WO2021235288A1 - Power circuit device - Google Patents

Power circuit device Download PDF

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Publication number
WO2021235288A1
WO2021235288A1 PCT/JP2021/018016 JP2021018016W WO2021235288A1 WO 2021235288 A1 WO2021235288 A1 WO 2021235288A1 JP 2021018016 W JP2021018016 W JP 2021018016W WO 2021235288 A1 WO2021235288 A1 WO 2021235288A1
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WO
WIPO (PCT)
Prior art keywords
power circuit
transformer
circuit device
transformers
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/018016
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 瀧川
隆 熊谷
健太 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2022524408A priority Critical patent/JP7305044B2/en
Publication of WO2021235288A1 publication Critical patent/WO2021235288A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC

Definitions

  • This disclosure relates to a power circuit device.
  • the transformer device described in Patent Document 1 Japanese Unexamined Patent Publication No. 2013-51258, is referred to as two printed wiring boards (hereinafter, "first printed wiring board” and “second printed wiring board”, respectively. ) And a plurality of transformers.
  • the first printed wiring board and the second printed wiring board are arranged facing each other with a gap.
  • the plurality of transformers are arranged in a matrix between the first printed wiring board and the second printed wiring board.
  • the spacing between the columns of two adjacent transformers in the row direction is constant along the column direction.
  • the present disclosure provides a power circuit device capable of enhancing the cooling uniformity for each transformer.
  • the power circuit device of the present disclosure is arranged between the first substrate and the second substrate, which are spaced apart from each other in the first direction, and between the first substrate and the second substrate, and is the first. It comprises a plurality of first transformers arranged so as to form a first row inclined with respect to a second direction orthogonal to one direction.
  • the power circuit device of the present disclosure it is possible to improve the uniformity of cooling for each transformer.
  • power circuit device 100 (First Embodiment)
  • power circuit device 100 the configuration of the power circuit device (hereinafter referred to as “power circuit device 100”) according to the first embodiment will be described.
  • FIG. 1 is a circuit diagram of the power circuit device 100. As shown in FIG. 1, the power circuit device 100 includes a primary side circuit 10, a secondary side circuit 20, and a transformer 30. The power circuit device 100 constitutes a DC / DC converter.
  • the primary side circuit 10 includes a ground terminal 11, an input terminal 12, an input side switching element 13a, an input side switching element 13b, an input side switching element 13c, an input side switching element 13d, and an input capacitor 14. doing.
  • the ground terminal 11 is grounded.
  • the input terminal 12, the input voltage V in of the power circuit 100 is applied.
  • the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are, for example, MOSFETs (Metal Oxide Field Effect Transistors).
  • the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d may be IGBTs (Insulated Gate Bipolar Transistors).
  • the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are formed on, for example, a silicon (Si) substrate.
  • the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d may be formed on a substrate made of silicon carbide (SiC) or gallium nitride (GaN).
  • Each of the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d has a drain, a source, and a gate.
  • the drain of the input side switching element 13a is connected to the input terminal 12.
  • the drain of the input side switching element 13b is connected to the source of the input side switching element 13a.
  • the source of the input-side switching element 13b is connected to the ground terminal 11.
  • the drain of the input side switching element 13c is connected to the input terminal 12.
  • the drain of the input side switching element 13d is connected to the source of the input side switching element 13c.
  • the source of the input-side switching element 13d is connected to the ground terminal 11.
  • the gates of the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are connected to a control circuit (not shown).
  • the input capacitor 14 is connected to the ground terminal 11 and the input terminal 12 so as to be in parallel with the input side switching element 13a and the input side switching element 13b (input side switching element 13c and input side switching element 13d).
  • the secondary circuit 20 includes a ground terminal 21, an output terminal 22, an output side rectifying element 23a, an output side rectifying element 23b, an output side rectifying element 23c, an output side rectifying element 23d, and an output capacitor 24.
  • the ground terminal 21 is grounded.
  • the output voltage V out of the power circuit device 100 is output from the output terminal 22.
  • the output side rectifying element 23a, the output side rectifying element 23b, the output side rectifying element 23c, and the output side rectifying element 23d are, for example, Schottky barrier diodes.
  • the output-side rectifying element 23a, the output-side rectifying element 23b, the output-side rectifying element 23c, and the output-side rectifying element 23d are formed on, for example, a substrate made of silicon, silicon carbide, or gallium nitride.
  • the output side rectifying element 23a, the output side rectifying element 23b, the output side rectifying element 23c, and the output side rectifying element 23d have a cathode and an anode.
  • the cathode of the output side rectifying element 23a is connected to the output terminal 22.
  • the cathode of the output side rectifying element 23b is connected to the anode of the output side rectifying element 23a.
  • the anode of the output side rectifying element 23b is connected to the ground terminal 21.
  • the cathode of the output side rectifying element 23c is connected to the output terminal 22.
  • the cathode of the output side rectifying element 23d is connected to the anode of the output side rectifying element 23c.
  • the anode of the output side rectifying element 23d is connected to the ground terminal 21.
  • the output capacitor 24 is connected to the ground terminal 21 and the output terminal 22 so as to be in parallel with the output side rectifying element 23a and the output side rectifying element 23b (output side rectifying element 23c and output side rectifying element 23d).
  • the transformer 30 is composed of a plurality of transformers that can be regarded as one transformer as an equivalent circuit.
  • the transformer 30 is composed of, for example, a transformer 31a to a transformer 31e, a transformer 32a to a transformer 32e, a transformer 33a to a transformer 33e, a transformer 34a to a transformer 34e, a transformer 35a to a transformer 35e, and a transformer 36a to a transformer 36e. ing.
  • the transformer 31a has a primary coil 37a, a secondary coil 37b, and a core 38.
  • the primary coil 37a and the secondary coil 37b are magnetically coupled by the core 38.
  • the primary side coil 37a and the secondary side coil 37b are conductive materials (for example, metal materials such as copper (Cu), gold (Au), copper alloy, nickel (Ni) alloy, gold alloy, silver (Ag) alloy, etc.). It is a winding formed by.
  • the core 38 is, for example, a ferrite core such as manganese (Mn) -zinc (Zn) -based ferrite, nickel-zinc-based ferrite, an amorphous core, or an iron dust core.
  • the primary coil 37a and the secondary coil 37b pass through a hole formed in the core 38.
  • the core 38 may be an EI type core.
  • the core 38 may be an EE type core, a U type core, an ER type core, or an ER type core.
  • the transformer 31a may be an outer iron type planar transformer. When the transformer 31a is an outer iron type planar transformer, the heat dissipation of the transformer 31a is improved.
  • the transformer 31a may be a transformer using a toroidal core. When the transformer 31a is a transformer using a toroidal core, the heat dissipation of the core 38 is improved.
  • Each of the transformers 31b to 31e, the transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e have the same configurations as the transformer 31a, for example. ing.
  • One end of the primary coil 37a of the transformers 31a to 31e is connected to the source of the input-side switching element 13a and the drain of the input-side switching element 13b.
  • the other ends of the primary coil 37a of the transformers 31a to 31e are connected to one end of the primary coils 37a of the transformers 32a to 32e, respectively.
  • the other ends of the primary coil 37a of the transformers 32a to 32e are connected to one end of the primary coils 37a of the transformers 33a to 33e, respectively.
  • the other end of the primary coil 37a of the transformer 33a to 33e is connected to one end of the primary coil 37a of the transformer 34a to 34e, respectively.
  • the other ends of the primary coil 37a of the transformers 34a to 34e are connected to one end of the primary coils 37a of the transformers 35a to 35e, respectively.
  • the other ends of the primary coil 37a of the transformers 35a to 35e are connected to one end of the primary coils 37a of the transformers 36a to 36e, respectively.
  • the other end of the primary coil 37a of the transformers 36a to 36e is connected to the source of the input-side switching element 13c and the drain of the input-side switching element 13d.
  • One end of the secondary coil 37b of the transformers 31a to 31e is connected to the anode of the output side rectifying element 23a and the cathode of the output side rectifying element 23b.
  • the other ends of the secondary coil 37b of the transformers 31a to 31e are connected to one end of the secondary coils 37b of the transformers 32a to 32e, respectively.
  • the other ends of the secondary coil 37b of the transformers 32a to 32e are connected to one end of the secondary coils 37b of the transformers 33a to 33e, respectively.
  • the other end of the secondary coil 37b of the transformers 33a to 33e is connected to one end of the secondary coil 37b of the transformers 34a to 34a, respectively.
  • the other end of the secondary coil 37b of the transformers 34a to 34e is connected to one end of the secondary coil 37b of the transformers 35a to 35e, respectively.
  • the other end of the secondary coil 37b of the transformers 35a to 35e is connected to one end of the secondary coil 37b of the transformers 36a to 36e, respectively.
  • the other end of the secondary coil 37b of the transformers 36a to 36e is connected to the anode of the output side rectifying element 23c and the cathode of the output side rectifying element 23d.
  • FIG. 2A is an exploded perspective view of the power circuit device 100.
  • the output side rectifying element 23a to the output side rectifying element 23d, the output terminal 22, and the output capacitor 24 are shown by dotted lines.
  • FIG. 2B is a perspective view of the power circuit device 100.
  • FIG. 2C is a perspective view of the power circuit device 100 in which the second substrate 50 is transparently displayed.
  • the power circuit device 100 further includes a first substrate 40 and a second substrate 50.
  • the first substrate 40 has a first surface 40a and a second surface 40b.
  • the first surface 40a and the second surface 40b are the main surfaces of the first substrate 40.
  • the second surface 40b is the opposite surface of the first surface 40a.
  • the second substrate 50 has a first surface 50a and a second surface 50b.
  • the first surface 50a and the second surface 50b are the main surfaces of the second substrate 50.
  • the second surface 50b is the opposite surface of the first surface 50a.
  • the first substrate 40 and the second substrate 50 are arranged at intervals in the first direction DR1 so that the first surface 40a and the second surface 50b face each other.
  • the ground terminal 11 (not shown in FIGS. 2A to 2C), the input terminal 12, the input side switching element 13a to the input side switching element 13d, and the input capacitor 14 are arranged on the first surface 40a.
  • the ground terminal 21 (not shown in FIGS. 2A to 2C), the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, and the output capacitor 24 are arranged on the second surface 50b.
  • the transformer 30 (transformer 31a to transformer 31e, transformer 32a to transformer 32e, transformer 33a to transformer 33e, transformer 34a to transformer 34e, transformer 35a to transformer 35e, and transformer 36a to transformer 36e) includes the first substrate 40 and the second substrate 50. (More specifically, between the first surface 40a and the second surface 50b).
  • FIG. 3A is a plan view of the power circuit device 100.
  • the illustration of the second substrate 50 is omitted.
  • the transformers 31a to 31e are arranged so as to form an inclined row (hereinafter, referred to as “first row L1”) with respect to the second direction DR2.
  • the transformers 32a to 32e are arranged so as to form an inclined row (hereinafter referred to as "second row L2") with respect to the second direction DR2.
  • the second direction DR2 is a direction orthogonal to the first direction DR1.
  • the transformers 31a to 31e are arranged in this order from one side in the second direction DR2 (corresponding to the upper side in FIG. 3A) to the other side in the second direction DR2 (corresponding to the lower side in FIG. 3A). ing.
  • the transformers 32a to 32e are arranged in this order from one side in the second direction DR2 toward the other side in the second direction DR2.
  • the cooling air for cooling the transformer 30 is blown from the other side in the second direction DR2 to one side in the second direction DR2.
  • the transformers 31a to 31e are arranged to face each other at a distance from the transformers 32a to 32e in the third direction DR3.
  • the third direction DR3 is a direction orthogonal to the first direction DR1 and the second direction DR2.
  • the distance between the transformer 31b and the transformer 32b in the third direction DR3 is wider than the distance between the transformer 31a and the transformer 32a in the third direction DR3.
  • the distance between the transformer 31c and the transformer 32c in the third direction DR3 is wider than the distance between the transformer 31b and the transformer 32b in the third direction DR3.
  • the distance between the transformer 31d and the transformer 32d in the third direction DR3 is wider than the distance between the transformer 31c and the transformer 32c in the third direction DR3.
  • the distance between the transformer 31e and the transformer 32e in the third direction DR3 is wider than the distance between the transformer 31d and the transformer 32d in the third direction DR3.
  • the distance between the first row L1 and the second row L2 in the third direction DR3 increases from one side in the second direction DR2 toward the other side in the second direction DR2. , Is spreading. That is, the distance between the first row L1 and the second row L2 in the third direction DR3 increases as it approaches the source of the cooling air.
  • the transformers 33a to 33e and the transformers 35a to 35e are arranged so as to form the first row L1 respectively. Further, the transformers 34a to 34e and the transformers 36a to 36e are arranged so as to form the second row L2, respectively.
  • FIG. 3B is a plan view of the power circuit device 100 according to the first modification.
  • FIG. 3C is a plan view of the power circuit device 100 according to the second modification.
  • the first row L1 and the second row L2 do not have to be linear in a plan view.
  • the distance in the third direction DR3 between the transformers belonging to two adjacent first row L1s (belonging to the second row L2) is from one side to the second in the second direction DR2. It may become smaller (see FIG. 3B) or larger (see FIG. 3C) toward the other side in the direction DR2.
  • FIG. 3D is a plan view of the power circuit device 100 according to the third modification.
  • FIG. 3E is a plan view of the power circuit device 100 according to the fourth modification.
  • the first row L1 and the second row L2 may be inclined in the same direction. In this case, the distance between the first row L1 and the second row L2 in the third direction DR3 does not widen from one side in the second direction DR2 toward the other side in the second direction DR2.
  • wiring is formed on the first substrate 40 and the second substrate 50.
  • the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24 and the transformer 30. are connected as shown in FIG.
  • the wiring of the primary circuit 10 is formed on the first substrate 40.
  • the wiring of the secondary circuit 20 is formed on the second substrate 50.
  • the first substrate 40 and the second substrate 50 may be formed with a solid pattern (a copper foil pattern that fills a large area) as a ground pattern at a portion where the above wiring is not formed.
  • FIG. 4A is a side view of the power circuit device 100 when viewed along the third direction DR3.
  • FIG. 4B is a side view of the power circuit device 100 when viewed along the second direction DR2.
  • the transformers (transformers 32a to 32e) belonging to the second row L2 are the transformers (transformers) belonging to the first row L1 respectively. It is in a position overlapping with 31a to 31e).
  • the transformers belonging to the first row L1 are positioned at different positions from each other, and the transformers belonging to the second row L2 are located.
  • the second direction DR2 is a direction in which the transformers belonging to the first row L1 (second row L2) appear to be offset from each other
  • the third direction DR3 is in the second row L2. This is the direction in which the transformer to which it belongs appears to overlap the transformer belonging to the first column L1.
  • the power circuit device 100 is not limited to the DC / DC converter.
  • the power circuit device 100 may be a circuit device including a transformer other than the DC / DC converter. Further, the above-mentioned number of rows and columns in the transformer 30 is an example.
  • power circuit device 200 the power circuit device 200 according to the comparative example.
  • the power circuit device 200 includes a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50. In this respect, the configuration of the power circuit device 200 is common to the configuration of the power circuit device 100.
  • FIG. 5 is a plan view of the power circuit device 200.
  • the illustration of the second substrate 50 is omitted.
  • the transformers 31a to 31e are arranged so as to form a row (hereinafter referred to as “third row L3”) along the second direction DR2.
  • the transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e are arranged so as to form the third row L3, respectively.
  • the configuration of the power circuit device 200 is different from the configuration of the power circuit device 100.
  • the transformers 31a to 31e, the transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e are located along the second direction DR2. Since they are arranged so as to form three rows L3, the cooling air supplied to the transformer is on the other side of the second direction DR2 from the transformer (that is, at a position closer to the source of the cooling air than the transformer). (There is) It is easy to be disturbed by other transformers. As a result, the cooling effect of the cooling air becomes smaller as the transformer is on one side in the second direction DR2.
  • the first row L1 and the second row L2 are inclined with respect to the second direction DR2, and between the first row L1 and the second row L2 in the third direction DR3. Since the interval extends from one side in the second direction DR2 toward the other side in the second direction DR2, the cooling air supplied to the transformer included in the first row L1 (second row L2) is in the first row. It is less likely to be disturbed by another transformer included in L1 and located on the other side of the second direction DR2 than the transformer.
  • the distance between the first row L1 and the second row L2 in the third direction DR3 is from one side to the second in the second direction DR2. Although it does not extend toward the other side in the direction DR2, it is included in the first row L1 (second row L2) because the first row L1 (second row L2) is inclined with respect to the second direction DR2.
  • the cooling air supplied to the transformer is contained in the first row L1 and is less likely to be obstructed by another transformer located on the other side of the second direction DR2 than the transformer.
  • the power circuit device 100 it is possible to improve the uniformity of cooling for each transformer. Further, as a result of increasing the cooling uniformity for each transformer, the power circuit device 100 can be further miniaturized and operated at a higher temperature.
  • the first board 40 and the second board 50 function as ducts. As a result, the cooling air can be supplied to the transformer 30 without being dissipated. Since the power circuit device 100 has a structure in which the transformer 30 is sandwiched between the first board 40 and the second board 50, the strength of the device can be increased.
  • the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 are mixed on one board. As a result, the substrate area increases. However, in the power circuit device 100, since the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 are formed on the first board 40 and the second board 50, respectively, the area of each board is reduced. This makes it possible to reduce the size of the device. Further, in the power circuit device 100, as a result of the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 being formed on the first board 40 and the second board 50, respectively, the wiring is simplified and the wiring impedance is increased. The resulting noise can be reduced.
  • the solid pattern When a solid pattern (a copper foil pattern that fills a large area) is formed on the first substrate 40 and the second substrate 50 as a ground pattern, the solid pattern functions as an electromagnetic shield by sandwiching the power circuit.
  • the amount of noise emitted to the outside and the amount of noise received from the outside can be reduced, and the noise resistance of the power circuit device 100 is improved. Further, in this case, the amount of the etching solution consumed in producing the first substrate 40 and the second substrate 50 can be reduced, so that the production cost can be reduced.
  • power circuit device 300 the configuration of the power circuit device (hereinafter referred to as “power circuit device 300”) according to the second embodiment will be described.
  • the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.
  • the power circuit device 300 has a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50.
  • the transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1.
  • the transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively.
  • the configuration of the power circuit device 300 is common to the configuration of the power circuit device 100.
  • FIG. 6 is a plan view of the power circuit device 300.
  • the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24, and The illustration of the second substrate 50 is omitted.
  • the distance in the second direction DR2 between two adjacent transformers increases from the other side in the second direction DR2 toward one side in the second direction DR2. That is, the distance in the second direction DR2 between two adjacent transformers increases as the distance from the source of the cooling air increases.
  • the configuration of the power circuit device 300 is different from the configuration of the power circuit device 100.
  • the distance between the two adjacent transformers in the second direction DR2 increases as the distance from the source of the cooling air increases, so that the distance from the source of the cooling air increases, the more the cooling air passes through.
  • the possible routes are widening. Therefore, in the power circuit device 300, it becomes easier to supply the cooling air to the transformer located at a position away from the source of the cooling air, so that the uniformity of cooling for each transformer can be further improved.
  • power circuit device 400 the configuration of the power circuit device (hereinafter referred to as “power circuit device 400”) according to the third embodiment will be described.
  • the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.
  • the power circuit device 400 has a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50.
  • the transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1.
  • the transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively.
  • the configuration of the power circuit device 400 is common to the configuration of the power circuit device 100.
  • FIG. 7 is a plan view of the power circuit device 400.
  • the illustration of the second substrate 50 is omitted.
  • each transformer included in the transformer 30 has a side surface 39.
  • Each transformer included in the transformer 30 is arranged so that the side surface 39 is inclined with respect to the second direction DR2. That is, each of the transformers included in the transformer 30 is arranged so that the side surface 39 is inclined with respect to the direction of the cooling air.
  • the configuration of the power circuit device 400 is different from the configuration of the power circuit device 100.
  • the power circuit device 400 since the side surface 39 is inclined with respect to the direction of the cooling air, turbulence is unlikely to occur when the side surface 39 and the cooling air collide with each other. As a result, according to the power circuit device 400, it becomes easier to supply the cooling air to the transformers located at a position away from the source of the cooling air, so that the uniformity of cooling for each transformer can be further improved.
  • power circuit device 500 the configuration of the power circuit device (hereinafter referred to as “power circuit device 500”) according to the fourth embodiment will be described.
  • the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.
  • the power circuit device 500 includes a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50.
  • the transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1.
  • the transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively.
  • the configuration of the power circuit device 500 is common to the configuration of the power circuit device 100.
  • FIG. 8A is a perspective view of the power circuit device 500.
  • FIG. 8B is a plan view of the power circuit device 500.
  • FIG. 8C is a cross-sectional view of the power circuit device 500.
  • FIG. 8C shows cross sections at positions corresponding to VIIIC-VIIIC in FIGS. 8A and 8B.
  • the first substrate 40 is formed with a through hole 40c that penetrates the first substrate 40 in the thickness direction.
  • the second substrate 50 is formed with a through hole 50c that penetrates the second substrate 50 in the thickness direction.
  • the through hole 40c and the through hole 50c are formed at positions overlapping with each of the transformers included in the transformer 30 in a plan view.
  • the power circuit device 500 further includes a resin member 60 and a resin member 70. In these respects, the configuration of the power circuit device 500 is different from the configuration of the power circuit device 100.
  • the resin member 60 has a first portion 61, a second portion 62, and a third portion 63.
  • the first portion 61 is on the first surface 40a and is in contact with each of the transformers included in the transformer 30. That is, each transformer included in the transformer 30 is adhered to the first substrate 40 by the resin member 60.
  • the second portion 62 is on the second surface 40b.
  • the third portion 63 is arranged in the through hole 40c and connects the first portion 61 and the second portion 62.
  • the outer diameter of the resin member 60 in the first portion 61 and the second portion 62 is larger than the inner diameter of the through hole 40c.
  • the resin member 70 has the same configuration as the resin member 60.
  • the resin member 70 has a first portion 71, a second portion 72, and a third portion 73.
  • the first portion 71 is on the second surface 50b and is in contact with each transformer included in the transformer 30 (each transformer included in the transformer 30 is adhered to the second substrate 50 by the resin member 70). Yes).
  • the second portion 72 is on the first surface 50a.
  • the third portion 73 is arranged in the through hole 50c and connects the first portion 71 and the second portion 72.
  • the outer diameter of the resin member 70 in the first portion 71 and the second portion 72 is larger than the inner diameter of the through hole 50c.
  • the resin member 60 and the resin member 70 are made of a resin material.
  • the resin material is, for example, polypropylene (PP), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), polycarbonate (PC), fluororesin, phenol resin, melamine resin, polyurethane, epoxy resin, silicone and the like.
  • the resin member 60 and the resin member 70 may be formed of polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), or the like containing a heat conductive filler.
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • PEEK polyetheretherketone
  • the heat generated in each of the transformers included in the transformer 30 is released to the surrounding space via the resin member 60 (resin member 70) and the first substrate 40 (second substrate 50). It will be. Therefore, according to the power circuit device 500, the heat dissipation performance is improved.
  • each transformer included in the transformer 30 is adhered to the first substrate 40 (second substrate 50) by the resin member 60 (resin member 70). Therefore, according to the power circuit device 500, the impact resistance can be improved.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Transformer Cooling (AREA)

Abstract

A power circuit device (100) comprises: a first substrate (40) and a second substrate (50) that are disposed spaced apart from and opposite one another in a first direction (DR1); and a plurality of first transformers (31a, 31b, 31c, 31d, 31e) that are disposed between the first substrate and the second substrate so as to form a first row (L1) that is inclined with respect to a second direction (DR2) orthogonal to the first direction.

Description

電力回路装置Power circuit equipment

　本開示は、電力回路装置に関する。 This disclosure relates to a power circuit device.

　特許文献１（特開２０１３－５１２５８号公報）に記載されているトランス装置は、２枚の印刷配線基板（以下においては、それぞれ「第１印刷配線基板」及び「第２印刷配線基板」とする）と、複数のトランスとを有している。 The transformer device described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2013-51258) is referred to as two printed wiring boards (hereinafter, "first printed wiring board" and "second printed wiring board", respectively. ) And a plurality of transformers.

　第１印刷配線基板及び第２印刷配線基板は、間隔を空けて対向配置されている。複数のトランスは、第１印刷配線基板と第２印刷配線基板との間において、マトリクス状に配列されている。行方向において隣り合う２つのトランスの列の間の間隔は、列方向に沿って一定となっている。 The first printed wiring board and the second printed wiring board are arranged facing each other with a gap. The plurality of transformers are arranged in a matrix between the first printed wiring board and the second printed wiring board. The spacing between the columns of two adjacent transformers in the row direction is constant along the column direction.

特開２０１３－５１２５８号公報Japanese Unexamined Patent Publication No. 2013-51258

　特許文献１に記載されているトランス装置においては、列方向における一方側から列方向における他方側に向かって冷却風が供給される際、トランスに供給される冷却風は、当該トランスよりも列方向における一方側にある別のトランスにより遮られやすいため、当該冷却風により冷却されがたい。すなわち、特許文献１に記載されているトランス装置においては、各々のトランスが均一に冷却されがたい。 In the transformer device described in Patent Document 1, when the cooling air is supplied from one side in the row direction to the other side in the row direction, the cooling air supplied to the transformer is in the row direction rather than the transformer. It is difficult to be cooled by the cooling air because it is easily blocked by another transformer on one side of the above. That is, in the transformer device described in Patent Document 1, it is difficult to uniformly cool each transformer.

　本開示は、各々のトランスに対する冷却の均一性を高めることが可能な電力回路装置を提供するものである。 The present disclosure provides a power circuit device capable of enhancing the cooling uniformity for each transformer.

　本開示の電力回路装置は、第１方向において互いに間隔を空けて対向配置されている第１基板及び第２基板と、第１基板と第２基板との間に配置されており、かつ、第１方向に直交している第２方向に対して傾斜している第１列をなすように配列されている複数の第１トランスとを備える。 The power circuit device of the present disclosure is arranged between the first substrate and the second substrate, which are spaced apart from each other in the first direction, and between the first substrate and the second substrate, and is the first. It comprises a plurality of first transformers arranged so as to form a first row inclined with respect to a second direction orthogonal to one direction.

　本開示の電力回路装置によると、各々のトランスに対する冷却の均一性を高めることが可能となる。 According to the power circuit device of the present disclosure, it is possible to improve the uniformity of cooling for each transformer.

電力回路装置１００の回路図である。It is a circuit diagram of a power circuit device 100. 電力回路装置１００の分解斜視図である。It is an exploded perspective view of the power circuit apparatus 100. 電力回路装置１００の斜視図である。It is a perspective view of the power circuit apparatus 100. 第２基板５０を透過表示させた電力回路装置１００の斜視図である。It is a perspective view of the electric power circuit apparatus 100 which made the 2nd board 50 transparently display. 電力回路装置１００の平面図である。It is a top view of the power circuit apparatus 100. 第１変形例に係る電力回路装置１００の平面図である。It is a top view of the power circuit apparatus 100 which concerns on 1st modification. 第２変形例に係る電力回路装置１００の平面図である。It is a top view of the power circuit apparatus 100 which concerns on the 2nd modification. 第３変形例に係る電力回路装置１００の平面図である。It is a top view of the power circuit apparatus 100 which concerns on 3rd modification. 第４変形例に係る電力回路装置１００の平面図である。It is a top view of the power circuit apparatus 100 which concerns on 4th modification. 第３方向ＤＲ３に沿って見た際の電力回路装置１００の側面図である。It is a side view of the power circuit apparatus 100 when viewed along the 3rd direction DR3. 第２方向ＤＲ２に沿って見た際の電力回路装置１００の側面図である。It is a side view of the power circuit apparatus 100 when viewed along the 2nd direction DR2. 電力回路装置２００の平面図である。It is a top view of the power circuit apparatus 200. 電力回路装置３００の平面図である。It is a top view of the power circuit apparatus 300. 電力回路装置４００の平面図である。It is a top view of the power circuit apparatus 400. 電力回路装置５００の斜視図である。It is a perspective view of the power circuit apparatus 500. 電力回路装置５００の平面図である。It is a top view of the power circuit apparatus 500. 電力回路装置５００の断面図である。It is sectional drawing of the electric power circuit apparatus 500.

　本開示の実施形態の詳細を、図面を参照しながら説明する。以下の図面においては、同一又は相当する部分に同一の参照符号を付し、重複する説明は繰り返さないものとする。 The details of the embodiments of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts shall be designated with the same reference numerals, and duplicate explanations shall not be repeated.

　（第１実施形態）
　以下に、第１実施形態に係る電力回路装置（以下においては、「電力回路装置１００」とする）の構成を説明する。 (First Embodiment)
Hereinafter, the configuration of the power circuit device (hereinafter referred to as “power circuit device 100”) according to the first embodiment will be described.

　図１は、電力回路装置１００の回路図である。図１に示されるように、電力回路装置１００は、一次側回路１０と、二次側回路２０と、トランス３０とを有している。電力回路装置１００は、ＤＣ／ＤＣコンバータを構成している。 FIG. 1 is a circuit diagram of the power circuit device 100. As shown in FIG. 1, the power circuit device 100 includes a primary side circuit 10, a secondary side circuit 20, and a transformer 30. The power circuit device 100 constitutes a DC / DC converter.

　一次側回路１０は、接地端子１１と、入力端子１２と、入力側スイッチング素子１３ａと、入力側スイッチング素子１３ｂと、入力側スイッチング素子１３ｃと、入力側スイッチング素子１３ｄと、入力コンデンサ１４とを有している。 The primary side circuit 10 includes a ground terminal 11, an input terminal 12, an input side switching element 13a, an input side switching element 13b, an input side switching element 13c, an input side switching element 13d, and an input capacitor 14. doing.

　接地端子１１は、接地されている。入力端子１２には、電力回路装置１００の入力電圧Ｖｉｎが印加される。 The ground terminal 11 is grounded. The input terminal 12, the input voltage V in of the power circuit 100 is applied.

　入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄは、例えばＭＯＳＦＥＴ（Metal　Oxide　Field　Effect　Transistor）である。入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄは、ＩＧＢＴ（Insulated　Gate　Bipolar　Transistor）であってもよい。 The input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are, for example, MOSFETs (Metal Oxide Field Effect Transistors). The input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d may be IGBTs (Insulated Gate Bipolar Transistors).

　入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄは、例えばシリコン（Ｓｉ）の基板に形成されている。入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄは、炭化珪素（ＳｉＣ）又は窒化ガリウム（ＧａＮ）の基板に形成されていてもよい。 The input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are formed on, for example, a silicon (Si) substrate. The input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d may be formed on a substrate made of silicon carbide (SiC) or gallium nitride (GaN).

　入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄの各々は、ドレインと、ソースと、ゲートとを有している。 Each of the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d has a drain, a source, and a gate.

　入力側スイッチング素子１３ａのドレインは、入力端子１２に接続されている。入力側スイッチング素子１３ｂのドレインは、入力側スイッチング素子１３ａのソースに接続されている。入力側スイッチング素子１３ｂのソースは、接地端子１１に接続されている。 The drain of the input side switching element 13a is connected to the input terminal 12. The drain of the input side switching element 13b is connected to the source of the input side switching element 13a. The source of the input-side switching element 13b is connected to the ground terminal 11.

　入力側スイッチング素子１３ｃのドレインは、入力端子１２に接続されている。入力側スイッチング素子１３ｄのドレインは、入力側スイッチング素子１３ｃのソースに接続されている。入力側スイッチング素子１３ｄのソースは、接地端子１１に接続されている。 The drain of the input side switching element 13c is connected to the input terminal 12. The drain of the input side switching element 13d is connected to the source of the input side switching element 13c. The source of the input-side switching element 13d is connected to the ground terminal 11.

　入力側スイッチング素子１３ａ、入力側スイッチング素子１３ｂ、入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄのゲートは、制御回路（図示せず）に接続される。 The gates of the input side switching element 13a, the input side switching element 13b, the input side switching element 13c, and the input side switching element 13d are connected to a control circuit (not shown).

　入力コンデンサ１４は、入力側スイッチング素子１３ａ及び入力側スイッチング素子１３ｂ（入力側スイッチング素子１３ｃ及び入力側スイッチング素子１３ｄ）と並列になるように、接地端子１１と入力端子１２とに接続されている。 The input capacitor 14 is connected to the ground terminal 11 and the input terminal 12 so as to be in parallel with the input side switching element 13a and the input side switching element 13b (input side switching element 13c and input side switching element 13d).

　二次側回路２０は、グランド端子２１と、出力端子２２と、出力側整流素子２３ａと、出力側整流素子２３ｂと、出力側整流素子２３ｃと、出力側整流素子２３ｄと、出力コンデンサ２４とを有している。 The secondary circuit 20 includes a ground terminal 21, an output terminal 22, an output side rectifying element 23a, an output side rectifying element 23b, an output side rectifying element 23c, an output side rectifying element 23d, and an output capacitor 24. Have.

　グランド端子２１は、グランドされている。出力端子２２からは、電力回路装置１００の出力電圧Ｖｏｕｔが出力される。 The ground terminal 21 is grounded. The output voltage V out of the power circuit device 100 is output from the output terminal 22.

　出力側整流素子２３ａ、出力側整流素子２３ｂ、出力側整流素子２３ｃ及び出力側整流素子２３ｄは、例えばショットキーバリアダイオードである。出力側整流素子２３ａ、出力側整流素子２３ｂ、出力側整流素子２３ｃ及び出力側整流素子２３ｄは、例えばシリコン、炭化珪素又は窒化ガリウムの基板に形成されている。 The output side rectifying element 23a, the output side rectifying element 23b, the output side rectifying element 23c, and the output side rectifying element 23d are, for example, Schottky barrier diodes. The output-side rectifying element 23a, the output-side rectifying element 23b, the output-side rectifying element 23c, and the output-side rectifying element 23d are formed on, for example, a substrate made of silicon, silicon carbide, or gallium nitride.

　出力側整流素子２３ａ、出力側整流素子２３ｂ、出力側整流素子２３ｃ及び出力側整流素子２３ｄは、カソードと、アノードとを有している。出力側整流素子２３ａのカソードは、出力端子２２に接続されている。出力側整流素子２３ｂのカソードは、出力側整流素子２３ａのアノードに接続されている。出力側整流素子２３ｂのアノードは、グランド端子２１に接続されている。出力側整流素子２３ｃのカソードは、出力端子２２に接続されている。出力側整流素子２３ｄのカソードは、出力側整流素子２３ｃのアノードに接続されている。出力側整流素子２３ｄのアノードは、グランド端子２１に接続されている。 The output side rectifying element 23a, the output side rectifying element 23b, the output side rectifying element 23c, and the output side rectifying element 23d have a cathode and an anode. The cathode of the output side rectifying element 23a is connected to the output terminal 22. The cathode of the output side rectifying element 23b is connected to the anode of the output side rectifying element 23a. The anode of the output side rectifying element 23b is connected to the ground terminal 21. The cathode of the output side rectifying element 23c is connected to the output terminal 22. The cathode of the output side rectifying element 23d is connected to the anode of the output side rectifying element 23c. The anode of the output side rectifying element 23d is connected to the ground terminal 21.

　出力コンデンサ２４は、出力側整流素子２３ａ及び出力側整流素子２３ｂ（出力側整流素子２３ｃ及び出力側整流素子２３ｄ）と並列になるように、グランド端子２１と出力端子２２とに接続されている。 The output capacitor 24 is connected to the ground terminal 21 and the output terminal 22 so as to be in parallel with the output side rectifying element 23a and the output side rectifying element 23b (output side rectifying element 23c and output side rectifying element 23d).

　トランス３０は、等価回路として１つのトランスと見做せる複数のトランスにより構成されている。トランス３０は、例えば、トランス３１ａ～トランス３１ｅと、トランス３２ａ～トランス３２ｅと、トランス３３ａ～トランス３３ｅと、トランス３４ａ～トランス３４ｅと、トランス３５ａ～トランス３５ｅと、トランス３６ａ～トランス３６ｅとにより構成されている。 The transformer 30 is composed of a plurality of transformers that can be regarded as one transformer as an equivalent circuit. The transformer 30 is composed of, for example, a transformer 31a to a transformer 31e, a transformer 32a to a transformer 32e, a transformer 33a to a transformer 33e, a transformer 34a to a transformer 34e, a transformer 35a to a transformer 35e, and a transformer 36a to a transformer 36e. ing.

　トランス３１ａは、一次側コイル３７ａと、二次側コイル３７ｂと、コア３８とを有している。一次側コイル３７ａと二次側コイル３７ｂとは、コア３８により磁気結合されている。 The transformer 31a has a primary coil 37a, a secondary coil 37b, and a core 38. The primary coil 37a and the secondary coil 37b are magnetically coupled by the core 38.

　一次側コイル３７ａ及び二次側コイル３７ｂは、導電性材料（例えば、銅（Ｃｕ）、金（Ａｕ）、銅合金、ニッケル（Ｎｉ）合金、金合金、銀（Ａｇ）合金等の金属材料）により形成されている巻線である。 The primary side coil 37a and the secondary side coil 37b are conductive materials (for example, metal materials such as copper (Cu), gold (Au), copper alloy, nickel (Ni) alloy, gold alloy, silver (Ag) alloy, etc.). It is a winding formed by.

　コア３８は、例えばマンガン（Ｍｎ）－亜鉛（Ｚｎ）系フェライト、ニッケル－亜鉛系フェライト等のフェライトコア、アモルファスコア又はアイアンダストコアである。一次側コイル３７ａ及び二次側コイル３７ｂは、コア３８に形成されている穴の中を通っている。コア３８は、ＥＩ型コアであってもよい。コア３８は、ＥＥ型コア、Ｕ型コア、ＥＥＲ型コア又はＥＲ型コアであってもよい。 The core 38 is, for example, a ferrite core such as manganese (Mn) -zinc (Zn) -based ferrite, nickel-zinc-based ferrite, an amorphous core, or an iron dust core. The primary coil 37a and the secondary coil 37b pass through a hole formed in the core 38. The core 38 may be an EI type core. The core 38 may be an EE type core, a U type core, an ER type core, or an ER type core.

　トランス３１ａは、外鉄形のプレーナトランスであってもよい。トランス３１ａが外鉄形のプレーナトランスである場合、トランス３１ａの放熱性が向上する。トランス３１ａは、トロイダルコアを用いたトランスであってもよい。トランス３１ａがトロイダルコアを用いたトランスである場合、コア３８の放熱性が向上する。 The transformer 31a may be an outer iron type planar transformer. When the transformer 31a is an outer iron type planar transformer, the heat dissipation of the transformer 31a is improved. The transformer 31a may be a transformer using a toroidal core. When the transformer 31a is a transformer using a toroidal core, the heat dissipation of the core 38 is improved.

　トランス３１ｂ～トランス３１ｅ、トランス３２ａ～トランス３２ｅ、トランス３３ａ～トランス３３ｅ、トランス３４ａ～トランス３４ｅ、トランス３５ａ～トランス３５ｅ及びトランス３６ａ～トランス３６ｅの各々は、例えば、トランス３１ａと同様の構成を有している。 Each of the transformers 31b to 31e, the transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e have the same configurations as the transformer 31a, for example. ing.

　トランス３１ａ～トランス３１ｅの一次側コイル３７ａの一方端は、入力側スイッチング素子１３ａのソース及び入力側スイッチング素子１３ｂのドレインに接続されている。トランス３１ａ～トランス３１ｅの一次側コイル３７ａの他方端は、それぞれ、トランス３２ａ～トランス３２ｅの一次側コイル３７ａの一方端に接続されている。トランス３２ａ～トランス３２ｅの一次側コイル３７ａの他方端は、それぞれ、トランス３３ａ～トランス３３ｅの一次側コイル３７ａの一方端に接続されている。 One end of the primary coil 37a of the transformers 31a to 31e is connected to the source of the input-side switching element 13a and the drain of the input-side switching element 13b. The other ends of the primary coil 37a of the transformers 31a to 31e are connected to one end of the primary coils 37a of the transformers 32a to 32e, respectively. The other ends of the primary coil 37a of the transformers 32a to 32e are connected to one end of the primary coils 37a of the transformers 33a to 33e, respectively.

　トランス３３ａ～トランス３３ｅの一次側コイル３７ａの他方端は、それぞれ、トランス３４ａ～トランス３４ｅの一次側コイル３７ａの一方端に接続されている。トランス３４ａ～トランス３４ｅの一次側コイル３７ａの他方端は、それぞれ、トランス３５ａ～トランス３５ｅの一次側コイル３７ａの一方端に接続されている。 The other end of the primary coil 37a of the transformer 33a to 33e is connected to one end of the primary coil 37a of the transformer 34a to 34e, respectively. The other ends of the primary coil 37a of the transformers 34a to 34e are connected to one end of the primary coils 37a of the transformers 35a to 35e, respectively.

　トランス３５ａ～トランス３５ｅの一次側コイル３７ａの他方端は、それぞれ、トランス３６ａ～トランス３６ｅの一次側コイル３７ａの一方端に接続されている。トランス３６ａ～トランス３６ｅの一次側コイル３７ａの他方端は、入力側スイッチング素子１３ｃのソース及び入力側スイッチング素子１３ｄのドレインに接続されている。 The other ends of the primary coil 37a of the transformers 35a to 35e are connected to one end of the primary coils 37a of the transformers 36a to 36e, respectively. The other end of the primary coil 37a of the transformers 36a to 36e is connected to the source of the input-side switching element 13c and the drain of the input-side switching element 13d.

　トランス３１ａ～トランス３１ｅの二次側コイル３７ｂの一方端は、出力側整流素子２３ａのアノード及び出力側整流素子２３ｂのカソードに接続されている。トランス３１ａ～トランス３１ｅの二次側コイル３７ｂの他方端は、それぞれ、トランス３２ａ～トランス３２ｅの二次側コイル３７ｂの一方端に接続されている。トランス３２ａ～トランス３２ｅの二次側コイル３７ｂの他方端は、それぞれ、トランス３３ａ～トランス３３ｅの二次側コイル３７ｂの一方端に接続されている。 One end of the secondary coil 37b of the transformers 31a to 31e is connected to the anode of the output side rectifying element 23a and the cathode of the output side rectifying element 23b. The other ends of the secondary coil 37b of the transformers 31a to 31e are connected to one end of the secondary coils 37b of the transformers 32a to 32e, respectively. The other ends of the secondary coil 37b of the transformers 32a to 32e are connected to one end of the secondary coils 37b of the transformers 33a to 33e, respectively.

　トランス３３ａ～トランス３３ｅの二次側コイル３７ｂの他方端は、それぞれ、トランス３４ａ～トランス３４ａの二次側コイル３７ｂの一方端に接続されている。トランス３４ａ～トランス３４ｅの二次側コイル３７ｂの他方端は、それぞれ、トランス３５ａ～トランス３５ｅの二次側コイル３７ｂの一方端に接続されている。 The other end of the secondary coil 37b of the transformers 33a to 33e is connected to one end of the secondary coil 37b of the transformers 34a to 34a, respectively. The other end of the secondary coil 37b of the transformers 34a to 34e is connected to one end of the secondary coil 37b of the transformers 35a to 35e, respectively.

　トランス３５ａ～トランス３５ｅの二次側コイル３７ｂの他方端は、それぞれ、トランス３６ａ～トランス３６ｅの二次側コイル３７ｂの一方端に接続されている。トランス３６ａ～トランス３６ｅの二次側コイル３７ｂの他方端は、出力側整流素子２３ｃのアノード及び出力側整流素子２３ｄのカソードに接続されている。 The other end of the secondary coil 37b of the transformers 35a to 35e is connected to one end of the secondary coil 37b of the transformers 36a to 36e, respectively. The other end of the secondary coil 37b of the transformers 36a to 36e is connected to the anode of the output side rectifying element 23c and the cathode of the output side rectifying element 23d.

　図２Ａは、電力回路装置１００の分解斜視図である。図２Ａ中において、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力端子２２及び出力コンデンサ２４は、点線により示されている。図２Ｂは、電力回路装置１００の斜視図である。図２Ｃは、第２基板５０を透過表示させた電力回路装置１００の斜視図である。図２Ａ、図２Ｂ及び図２Ｃに示されるように、電力回路装置１００は、第１基板４０と、第２基板５０とをさらに有している。 FIG. 2A is an exploded perspective view of the power circuit device 100. In FIG. 2A, the output side rectifying element 23a to the output side rectifying element 23d, the output terminal 22, and the output capacitor 24 are shown by dotted lines. FIG. 2B is a perspective view of the power circuit device 100. FIG. 2C is a perspective view of the power circuit device 100 in which the second substrate 50 is transparently displayed. As shown in FIGS. 2A, 2B and 2C, the power circuit device 100 further includes a first substrate 40 and a second substrate 50.

　第１基板４０は、第１面４０ａと、第２面４０ｂとを有している。第１面４０ａ及び第２面４０ｂは、第１基板４０の主面である。第２面４０ｂは、第１面４０ａの反対面である。第２基板５０は、第１面５０ａと、第２面５０ｂとを有している。第１面５０ａ及び第２面５０ｂは、第２基板５０の主面である。第２面５０ｂは、第１面５０ａの反対面である。第１基板４０及び第２基板５０は、第１面４０ａと第２面５０ｂとが互いに対向するように、第１方向ＤＲ１において間隔を空けて配置されている。 The first substrate 40 has a first surface 40a and a second surface 40b. The first surface 40a and the second surface 40b are the main surfaces of the first substrate 40. The second surface 40b is the opposite surface of the first surface 40a. The second substrate 50 has a first surface 50a and a second surface 50b. The first surface 50a and the second surface 50b are the main surfaces of the second substrate 50. The second surface 50b is the opposite surface of the first surface 50a. The first substrate 40 and the second substrate 50 are arranged at intervals in the first direction DR1 so that the first surface 40a and the second surface 50b face each other.

　接地端子１１（図２Ａ～図２Ｃ中において図示せず）、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ及び入力コンデンサ１４は、第１面４０ａ上に配置されている。グランド端子２１（図２Ａ～図２Ｃ中において図示せず）、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ及び出力コンデンサ２４は、第２面５０ｂ上に配置されている。 The ground terminal 11 (not shown in FIGS. 2A to 2C), the input terminal 12, the input side switching element 13a to the input side switching element 13d, and the input capacitor 14 are arranged on the first surface 40a. The ground terminal 21 (not shown in FIGS. 2A to 2C), the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, and the output capacitor 24 are arranged on the second surface 50b.

　トランス３０（トランス３１ａ～トランス３１ｅ、トランス３２ａ～トランス３２ｅ、トランス３３ａ～トランス３３ｅ、トランス３４ａ～トランス３４ｅ、トランス３５ａ～トランス３５ｅ及びトランス３６ａ～トランス３６ｅ）は、第１基板４０と第２基板５０との間（より具体的には、第１面４０ａと第２面５０ｂとの間）に配置されている。 The transformer 30 (transformer 31a to transformer 31e, transformer 32a to transformer 32e, transformer 33a to transformer 33e, transformer 34a to transformer 34e, transformer 35a to transformer 35e, and transformer 36a to transformer 36e) includes the first substrate 40 and the second substrate 50. (More specifically, between the first surface 40a and the second surface 50b).

　図３Ａは、電力回路装置１００の平面図である。図３Ａ中においては、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。図３Ａに示されるように、トランス３１ａ～トランス３１ｅは、第２方向ＤＲ２に対して傾斜している列（以下においては、「第１列Ｌ１」とする）をなすように配列されている。 FIG. 3A is a plan view of the power circuit device 100. In FIG. 3A, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24, and the like. The illustration of the second substrate 50 is omitted. As shown in FIG. 3A, the transformers 31a to 31e are arranged so as to form an inclined row (hereinafter, referred to as “first row L1”) with respect to the second direction DR2.

　トランス３２ａ～トランス３２ｅは、第２方向ＤＲ２に対して傾斜している列（以下においては、「第２列Ｌ２」とする）をなすように配列されている。第２方向ＤＲ２は、第１方向ＤＲ１に直交している方向である。 The transformers 32a to 32e are arranged so as to form an inclined row (hereinafter referred to as "second row L2") with respect to the second direction DR2. The second direction DR2 is a direction orthogonal to the first direction DR1.

　トランス３１ａ～トランス３１ｅは、第２方向ＤＲ２における一方側（図３Ａ中の上側に対応）から第２方向ＤＲ２における他方側（図３Ａ中の下側に対応）に向かって、この順で配列されている。トランス３２ａ～トランス３２ｅは、第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かって、この順で配列されている。なお、図示されていないが、トランス３０を冷却するための冷却風は、第２方向ＤＲ２における他方側から第２方向ＤＲ２における一方側へと送風される。 The transformers 31a to 31e are arranged in this order from one side in the second direction DR2 (corresponding to the upper side in FIG. 3A) to the other side in the second direction DR2 (corresponding to the lower side in FIG. 3A). ing. The transformers 32a to 32e are arranged in this order from one side in the second direction DR2 toward the other side in the second direction DR2. Although not shown, the cooling air for cooling the transformer 30 is blown from the other side in the second direction DR2 to one side in the second direction DR2.

　トランス３１ａ～トランス３１ｅは、第３方向ＤＲ３において、トランス３２ａ～トランス３２ｅとそれぞれ間隔を空けて対向配置されている。第３方向ＤＲ３は、第１方向ＤＲ１及び第２方向ＤＲ２に直交している方向である。 The transformers 31a to 31e are arranged to face each other at a distance from the transformers 32a to 32e in the third direction DR3. The third direction DR3 is a direction orthogonal to the first direction DR1 and the second direction DR2.

　第３方向ＤＲ３におけるトランス３１ｂとトランス３２ｂとの間の間隔は、第３方向ＤＲ３におけるトランス３１ａとトランス３２ａとの間の間隔よりも広い。第３方向ＤＲ３におけるトランス３１ｃとトランス３２ｃとの間の間隔は、第３方向ＤＲ３におけるトランス３１ｂとトランス３２ｂとの間の間隔よりも広い。 The distance between the transformer 31b and the transformer 32b in the third direction DR3 is wider than the distance between the transformer 31a and the transformer 32a in the third direction DR3. The distance between the transformer 31c and the transformer 32c in the third direction DR3 is wider than the distance between the transformer 31b and the transformer 32b in the third direction DR3.

　第３方向ＤＲ３におけるトランス３１ｄとトランス３２ｄとの間の間隔は、第３方向ＤＲ３におけるトランス３１ｃとトランス３２ｃとの間の間隔よりも広い。第３方向ＤＲ３におけるトランス３１ｅとトランス３２ｅとの間の間隔は、第３方向ＤＲ３におけるトランス３１ｄとトランス３２ｄとの間の間隔よりも広い。 The distance between the transformer 31d and the transformer 32d in the third direction DR3 is wider than the distance between the transformer 31c and the transformer 32c in the third direction DR3. The distance between the transformer 31e and the transformer 32e in the third direction DR3 is wider than the distance between the transformer 31d and the transformer 32d in the third direction DR3.

　このことを別の観点から言えば、第３方向ＤＲ３における第１列Ｌ１と第２列Ｌ２との間の間隔は、第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かうにしたがって、拡がっている。すなわち、第３方向ＤＲ３における第１列Ｌ１と第２列Ｌ２との間の間隔は、冷却風の発生源に近づくにつれて、拡がっている。 From another point of view, the distance between the first row L1 and the second row L2 in the third direction DR3 increases from one side in the second direction DR2 toward the other side in the second direction DR2. , Is spreading. That is, the distance between the first row L1 and the second row L2 in the third direction DR3 increases as it approaches the source of the cooling air.

　トランス３３ａ～トランス３３ｅ及びトランス３５ａ～トランス３５ｅは、それぞれ第１列Ｌ１をなすように配列されている。また、トランス３４ａ～トランス３４ｅ及びトランス３６ａ～トランス３６ｅは、それぞれ第２列Ｌ２をなすように配列されている。 The transformers 33a to 33e and the transformers 35a to 35e are arranged so as to form the first row L1 respectively. Further, the transformers 34a to 34e and the transformers 36a to 36e are arranged so as to form the second row L2, respectively.

　図３Ｂは、第１変形例に係る電力回路装置１００の平面図である。図３Ｃは、第２変形例に係る電力回路装置１００の平面図である。図３Ｂ及び図３Ｃ中において、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。図３Ｂ及び図３Ｃに示されるように、第１列Ｌ１及び第２列Ｌ２は、平面視において、直線状でなくてもよい。 FIG. 3B is a plan view of the power circuit device 100 according to the first modification. FIG. 3C is a plan view of the power circuit device 100 according to the second modification. In FIGS. 3B and 3C, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, and the output capacitor. Illustrations of 24 and the second substrate 50 are omitted. As shown in FIGS. 3B and 3C, the first row L1 and the second row L2 do not have to be linear in a plan view.

　このことを別の観点から言えば、隣り合う２つの第１列Ｌ１に属する（第２列Ｌ２に属する）トランスの間の第３方向ＤＲ３における間隔が、第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かうにしたがって、小さくなっていてもよく（図３Ｂ参照）、大きくなっていてもよい（図３Ｃ参照）。 From another point of view, the distance in the third direction DR3 between the transformers belonging to two adjacent first row L1s (belonging to the second row L2) is from one side to the second in the second direction DR2. It may become smaller (see FIG. 3B) or larger (see FIG. 3C) toward the other side in the direction DR2.

　図３Ｄは、第３変形例に係る電力回路装置１００の平面図である。図３Ｅは、第４変形例に係る電力回路装置１００の平面図である。図３Ｄ及び図３Ｅ中において、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。図３Ｄ及び図３Ｅに示されるように、第１列Ｌ１及び第２列Ｌ２は、同一方向に傾斜していてもよい。この場合、第３方向ＤＲ３における第１列Ｌ１と第２列Ｌ２との間の間隔は、第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かうにしたがって拡がっていない。 FIG. 3D is a plan view of the power circuit device 100 according to the third modification. FIG. 3E is a plan view of the power circuit device 100 according to the fourth modification. In FIGS. 3D and 3E, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, and the output capacitor. Illustrations of 24 and the second substrate 50 are omitted. As shown in FIGS. 3D and 3E, the first row L1 and the second row L2 may be inclined in the same direction. In this case, the distance between the first row L1 and the second row L2 in the third direction DR3 does not widen from one side in the second direction DR2 toward the other side in the second direction DR2.

　図示されていないが、第１基板４０及び第２基板５０には、配線が形成されている。この配線により、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及びトランス３０は、図１に示されるように接続されている。一次側回路１０の配線は、第１基板４０に形成されている。二次側回路２０の配線は、第２基板５０に形成されている。なお、第１基板４０及び第２基板５０には、上記の配線が形成されていない箇所において、グランドパターンとして、べたパターン（大面積を塗りつぶすような銅箔パターン）が形成されていてもよい。 Although not shown, wiring is formed on the first substrate 40 and the second substrate 50. With this wiring, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24 and the transformer 30. Are connected as shown in FIG. The wiring of the primary circuit 10 is formed on the first substrate 40. The wiring of the secondary circuit 20 is formed on the second substrate 50. The first substrate 40 and the second substrate 50 may be formed with a solid pattern (a copper foil pattern that fills a large area) as a ground pattern at a portion where the above wiring is not formed.

　図４Ａは、第３方向ＤＲ３に沿って見た際の電力回路装置１００の側面図である。図４Ｂは、第２方向ＤＲ２に沿って見た際の電力回路装置１００の側面図である。図４Ａに示されるように、第３方向ＤＲ３に沿って電力回路装置１００を見ると、第２列Ｌ２に属するトランス（トランス３２ａ～トランス３２ｅ）は、それぞれ、第１列Ｌ１に属するトランス（トランス３１ａ～トランス３１ｅ）に重なる位置にある。他方で、図４Ｂに示されるように、第２方向ＤＲ２に沿って電力回路装置１００を見ると、第１列Ｌ１に属するトランスの各々は互いにずれた位置にあり、第２列Ｌ２に属するトランスの各々は互いにずれた位置にある。このことを別の観点から言えば、第２方向ＤＲ２は、第１列Ｌ１（第２列Ｌ２）に属するトランスの各々が互いにずれて見える方向であり、第３方向ＤＲ３は第２列Ｌ２に属するトランスが第１列Ｌ１に属するトランスに重なって見える方向である。 FIG. 4A is a side view of the power circuit device 100 when viewed along the third direction DR3. FIG. 4B is a side view of the power circuit device 100 when viewed along the second direction DR2. As shown in FIG. 4A, when the power circuit device 100 is viewed along the third direction DR3, the transformers (transformers 32a to 32e) belonging to the second row L2 are the transformers (transformers) belonging to the first row L1 respectively. It is in a position overlapping with 31a to 31e). On the other hand, as shown in FIG. 4B, when the power circuit device 100 is viewed along the second direction DR2, the transformers belonging to the first row L1 are positioned at different positions from each other, and the transformers belonging to the second row L2 are located. Each of them is in a position offset from each other. From another point of view, the second direction DR2 is a direction in which the transformers belonging to the first row L1 (second row L2) appear to be offset from each other, and the third direction DR3 is in the second row L2. This is the direction in which the transformer to which it belongs appears to overlap the transformer belonging to the first column L1.

　上記において、電力回路装置１００の例として、ＤＣ／ＤＣコンバータを説明したが、電力回路装置１００は、ＤＣ／ＤＣコンバータに限られない。電力回路装置１００は、ＤＣ／ＤＣコンバータ以外のトランスを含む回路装置であってもよい。また、トランス３０における上記の行段数及び列段数は、例示である。 Although the DC / DC converter has been described above as an example of the power circuit device 100, the power circuit device 100 is not limited to the DC / DC converter. The power circuit device 100 may be a circuit device including a transformer other than the DC / DC converter. Further, the above-mentioned number of rows and columns in the transformer 30 is an example.

　以下に、電力回路装置１００の効果を、比較例に係る電力回路装置（以下「電力回路装置２００」とする）と対比しながら説明する。 Hereinafter, the effect of the power circuit device 100 will be described in comparison with the power circuit device (hereinafter referred to as “power circuit device 200”) according to the comparative example.

　電力回路装置２００は、一次側回路１０と、二次側回路２０と、トランス３０と、第１基板４０と、第２基板５０とを有している。この点に関して、電力回路装置２００の構成は、電力回路装置１００の構成と共通している。 The power circuit device 200 includes a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50. In this respect, the configuration of the power circuit device 200 is common to the configuration of the power circuit device 100.

　図５は、電力回路装置２００の平面図である。図５中においては、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。図５に示されるように、トランス３１ａ～トランス３１ｅは、第２方向ＤＲ２に沿う列（以下においては、「第３列Ｌ３」という）をなすように配列されている。 FIG. 5 is a plan view of the power circuit device 200. In FIG. 5, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24, and the like. The illustration of the second substrate 50 is omitted. As shown in FIG. 5, the transformers 31a to 31e are arranged so as to form a row (hereinafter referred to as “third row L3”) along the second direction DR2.

　トランス３２ａ～トランス３２ｅ、トランス３３ａ～トランス３３ｅ、トランス３４ａ～トランス３４ｅ、トランス３５ａ～トランス３５ｅ及びトランス３６ａ～トランス３６ｅは、それぞれ、第３列Ｌ３をなすように配列されている。この点に関して、電力回路装置２００の構成は、電力回路装置１００の構成と異なっている。 The transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e are arranged so as to form the third row L3, respectively. In this respect, the configuration of the power circuit device 200 is different from the configuration of the power circuit device 100.

　電力回路装置２００では、トランス３１ａ～トランス３１ｅ、トランス３２ａ～トランス３２ｅ、トランス３３ａ～トランス３３ｅ、トランス３４ａ～トランス３４ｅ、トランス３５ａ～トランス３５ｅ及びトランス３６ａ～トランス３６ｅがそれぞれ第２方向ＤＲ２に沿う第３列Ｌ３をなすように配列されているため、トランスに供給される冷却風が当該トランスよりも第２方向ＤＲ２における他方側にある（つまり、当該トランスよりも冷却風の発生源に近い位置にある）他のトランスにより妨げられやすい。その結果、第２方向ＤＲ２における一方側にあるトランスほど、冷却風による冷却効果が小さくなる。 In the power circuit device 200, the transformers 31a to 31e, the transformers 32a to 32e, the transformers 33a to 33e, the transformers 34a to 34e, the transformers 35a to 35e, and the transformers 36a to 36e are located along the second direction DR2. Since they are arranged so as to form three rows L3, the cooling air supplied to the transformer is on the other side of the second direction DR2 from the transformer (that is, at a position closer to the source of the cooling air than the transformer). (There is) It is easy to be disturbed by other transformers. As a result, the cooling effect of the cooling air becomes smaller as the transformer is on one side in the second direction DR2.

　他方で、電力回路装置１００では、第１列Ｌ１及び第２列Ｌ２が第２方向ＤＲ２に対して傾斜しているとともに、第３方向ＤＲ３における第１列Ｌ１と第２列Ｌ２との間の間隔が第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かって拡がっているため、第１列Ｌ１（第２列Ｌ２）に含まれるトランスに供給される冷却風は、第１列Ｌ１に含まれ、かつ当該トランスよりも第２方向ＤＲ２における他方側に位置する他のトランスにより妨げられにくい。 On the other hand, in the power circuit device 100, the first row L1 and the second row L2 are inclined with respect to the second direction DR2, and between the first row L1 and the second row L2 in the third direction DR3. Since the interval extends from one side in the second direction DR2 toward the other side in the second direction DR2, the cooling air supplied to the transformer included in the first row L1 (second row L2) is in the first row. It is less likely to be disturbed by another transformer included in L1 and located on the other side of the second direction DR2 than the transformer.

　なお、第３変形例及び第４変形例に係る電力回路装置１００においては、第３方向ＤＲ３における第１列Ｌ１と第２列Ｌ２との間の間隔が第２方向ＤＲ２における一方側から第２方向ＤＲ２における他方側に向かって拡がっていないが、第１列Ｌ１（第２列Ｌ２）が第２方向ＤＲ２に対して傾斜しているため、第１列Ｌ１（第２列Ｌ２）に含まれるトランスに供給される冷却風は、第１列Ｌ１に含まれ、かつ当該トランスよりも第２方向ＤＲ２における他方側に位置する他のトランスにより妨げられにくい。 In the power circuit device 100 according to the third modification and the fourth modification, the distance between the first row L1 and the second row L2 in the third direction DR3 is from one side to the second in the second direction DR2. Although it does not extend toward the other side in the direction DR2, it is included in the first row L1 (second row L2) because the first row L1 (second row L2) is inclined with respect to the second direction DR2. The cooling air supplied to the transformer is contained in the first row L1 and is less likely to be obstructed by another transformer located on the other side of the second direction DR2 than the transformer.

　このように、電力回路装置１００によると、各々のトランスに対する冷却の均一性を高めることが可能となる。また、各々のトランスに対する冷却の均一性が高められる結果、電力回路装置１００をさらに小型化すること及びさらに高温で動作させることが可能となる。 As described above, according to the power circuit device 100, it is possible to improve the uniformity of cooling for each transformer. Further, as a result of increasing the cooling uniformity for each transformer, the power circuit device 100 can be further miniaturized and operated at a higher temperature.

　電力回路装置１００においては、トランス３０が第１基板４０と第２基板５０とに挟み込まれているため、第１基板４０及び第２基板５０がダクトとして機能する。その結果、冷却風を散逸させることなくトランス３０に供給することができる。電力回路装置１００は、トランス３０が第１基板４０と第２基板５０に挟み込まれた構造を有しているため、装置の強度を高めることができる。 In the power circuit device 100, since the transformer 30 is sandwiched between the first board 40 and the second board 50, the first board 40 and the second board 50 function as ducts. As a result, the cooling air can be supplied to the transformer 30 without being dissipated. Since the power circuit device 100 has a structure in which the transformer 30 is sandwiched between the first board 40 and the second board 50, the strength of the device can be increased.

　電力回路装置１００を１枚の基板に実装する場合、１枚の基板に一次側回路１０の配線と二次側回路２０の配線が混在することになる。その結果、基板面積が増大してしまう。しかしながら、電力回路装置１００においては、一次側回路１０の配線及び二次側回路２０の配線をそれぞれ第１基板４０及び第２基板５０に形成しているため、各々の基板の面積を縮小することができ、装置の小型化が可能となる。また、電力回路装置１００においては、一次側回路１０の配線及び二次側回路２０の配線がそれぞれ第１基板４０及び第２基板５０に形成されている結果、配線が簡易になり、配線インピーダンスに起因したノイズを低減することができる。 When the power circuit device 100 is mounted on one board, the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 are mixed on one board. As a result, the substrate area increases. However, in the power circuit device 100, since the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 are formed on the first board 40 and the second board 50, respectively, the area of each board is reduced. This makes it possible to reduce the size of the device. Further, in the power circuit device 100, as a result of the wiring of the primary side circuit 10 and the wiring of the secondary side circuit 20 being formed on the first board 40 and the second board 50, respectively, the wiring is simplified and the wiring impedance is increased. The resulting noise can be reduced.

　第１基板４０及び第２基板５０にグランドパターンとしてべたパターン（大面積を塗りつぶすような銅箔パターン）が形成されている場合、当該べたパターンが電力回路を挟み込むことにより電磁シールドとして機能するため、外部に放出するノイズ量及び外部から受けるノイズ量を低減することができ、電力回路装置１００の耐ノイズ性が向上する。また、この場合、第１基板４０及び第２基板５０を生産する上で消費されるエッチング液の量を低減することができるため、生産コストを低下させることが可能となる。 When a solid pattern (a copper foil pattern that fills a large area) is formed on the first substrate 40 and the second substrate 50 as a ground pattern, the solid pattern functions as an electromagnetic shield by sandwiching the power circuit. The amount of noise emitted to the outside and the amount of noise received from the outside can be reduced, and the noise resistance of the power circuit device 100 is improved. Further, in this case, the amount of the etching solution consumed in producing the first substrate 40 and the second substrate 50 can be reduced, so that the production cost can be reduced.

　（第２実施形態）
　以下に、第２実施形態に係る電力回路装置（以下においては、「電力回路装置３００」とする）の構成を説明する。ここでは、電力回路装置１００の構成と異なる点を主に説明し、重複する説明は繰り返さない。 (Second Embodiment)
Hereinafter, the configuration of the power circuit device (hereinafter referred to as “power circuit device 300”) according to the second embodiment will be described. Here, the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置３００は、一次側回路１０と、二次側回路２０と、トランス３０と、第１基板４０と、第２基板５０とを有している。トランス３１ａ～トランス３１ｅ、トランス３３ａ～トランス３３ｅ及びトランス３５ａ～トランス３５ｅは、それぞれ第１列Ｌ１をなすように配列されている。トランス３２ａ～トランス３２ｅ、トランス３４ａ～トランス３４ｅ及びトランス３６ａ～トランス３６ｅは、それぞれ第２列Ｌ２をなすように配列されている。これらの点に関して、電力回路装置３００の構成は、電力回路装置１００の構成と共通している。 The power circuit device 300 has a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50. The transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1. The transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively. In these respects, the configuration of the power circuit device 300 is common to the configuration of the power circuit device 100.

　図６は、電力回路装置３００の平面図である。図６中においては、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。図６に示されるように、隣り合う２つのトランスの間の第２方向ＤＲ２における間隔は、第２方向ＤＲ２における他方側から第２方向ＤＲ２における一方側に向かうにしたがって、拡がっている。すなわち、隣り合う２つのトランスの間の第２方向ＤＲ２における間隔は、冷却風の発生源から遠ざかるにつれて、拡がっている。この点に関して、電力回路装置３００の構成は、電力回路装置１００の構成と異なっている。 FIG. 6 is a plan view of the power circuit device 300. In FIG. 6, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24, and The illustration of the second substrate 50 is omitted. As shown in FIG. 6, the distance in the second direction DR2 between two adjacent transformers increases from the other side in the second direction DR2 toward one side in the second direction DR2. That is, the distance in the second direction DR2 between two adjacent transformers increases as the distance from the source of the cooling air increases. In this respect, the configuration of the power circuit device 300 is different from the configuration of the power circuit device 100.

　以下に、電力回路装置３００の効果を説明する。ここでは、電力回路装置１００の効果と異なる点を主に説明し、重複する説明は繰り返さないものとする。 The effect of the power circuit device 300 will be described below. Here, the points different from the effect of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置３００においては、隣り合う２つのトランスの第２方向ＤＲ２における間の間隔が冷却風の発生源から遠ざかるにつれて拡がっているため、冷却風の発生源から遠ざかるほど、冷却風が通り抜けることのできる経路が広くなっている。そのため、電力回路装置３００においては、冷却風の発生源から離れた位置にあるトランスに冷却風をさらに供給しやすくなるため、各々のトランスに対する冷却の均一性をさらに高めることが可能となる。 In the power circuit device 300, the distance between the two adjacent transformers in the second direction DR2 increases as the distance from the source of the cooling air increases, so that the distance from the source of the cooling air increases, the more the cooling air passes through. The possible routes are widening. Therefore, in the power circuit device 300, it becomes easier to supply the cooling air to the transformer located at a position away from the source of the cooling air, so that the uniformity of cooling for each transformer can be further improved.

　（第３実施形態）
　以下に、第３実施形態に係る電力回路装置（以下においては、「電力回路装置４００」とする）の構成を説明する。ここでは、電力回路装置１００の構成と異なる点を主に説明し、重複する説明は繰り返さない。 (Third Embodiment)
Hereinafter, the configuration of the power circuit device (hereinafter referred to as “power circuit device 400”) according to the third embodiment will be described. Here, the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置４００は、一次側回路１０と、二次側回路２０と、トランス３０と、第１基板４０と、第２基板５０とを有している。トランス３１ａ～トランス３１ｅ、トランス３３ａ～トランス３３ｅ及びトランス３５ａ～トランス３５ｅは、それぞれ第１列Ｌ１をなすように配列されている。トランス３２ａ～トランス３２ｅ、トランス３４ａ～トランス３４ｅ及びトランス３６ａ～トランス３６ｅは、それぞれ第２列Ｌ２をなすように配列されている。これらの点に関して、電力回路装置４００の構成は、電力回路装置１００の構成と共通している。 The power circuit device 400 has a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50. The transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1. The transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively. In these respects, the configuration of the power circuit device 400 is common to the configuration of the power circuit device 100.

　図７は、電力回路装置４００の平面図である。図７中においては、入力端子１２、入力側スイッチング素子１３ａ～入力側スイッチング素子１３ｄ、入力コンデンサ１４、グランド端子２１、出力端子２２、出力側整流素子２３ａ～出力側整流素子２３ｄ、出力コンデンサ２４及び第２基板５０の図示が省略されている。 FIG. 7 is a plan view of the power circuit device 400. In FIG. 7, the input terminal 12, the input side switching element 13a to the input side switching element 13d, the input capacitor 14, the ground terminal 21, the output terminal 22, the output side rectifying element 23a to the output side rectifying element 23d, the output capacitor 24, and the like. The illustration of the second substrate 50 is omitted.

　図７に示されるように、トランス３０に含まれる各々のトランスは、側面３９を有している。トランス３０に含まれる各々のトランスは、側面３９が第２方向ＤＲ２に対して傾斜するように配置されている。すなわち、トランス３０に含まれる各々のトランスは、側面３９が冷却風の方向に対して傾斜するように配置されている。この点に関して、電力回路装置４００の構成は、電力回路装置１００の構成と異なっている。 As shown in FIG. 7, each transformer included in the transformer 30 has a side surface 39. Each transformer included in the transformer 30 is arranged so that the side surface 39 is inclined with respect to the second direction DR2. That is, each of the transformers included in the transformer 30 is arranged so that the side surface 39 is inclined with respect to the direction of the cooling air. In this respect, the configuration of the power circuit device 400 is different from the configuration of the power circuit device 100.

　以下に、電力回路装置４００の効果を説明する。ここでは、電力回路装置１００の効果と異なる点を主に説明し、重複する説明は繰り返さないものとする。 The effect of the power circuit device 400 will be described below. Here, the points different from the effect of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置４００においては、側面３９が冷却風の方向に対して傾斜しているため、側面３９と冷却風とが衝突した際に、乱流が発生しにくい。その結果、電力回路装置４００によると、冷却風の発生源から離れた位置にあるトランスに冷却風をさらに供給しやすくなるため、各々のトランスに対する冷却の均一性をさらに高めることが可能となる。 In the power circuit device 400, since the side surface 39 is inclined with respect to the direction of the cooling air, turbulence is unlikely to occur when the side surface 39 and the cooling air collide with each other. As a result, according to the power circuit device 400, it becomes easier to supply the cooling air to the transformers located at a position away from the source of the cooling air, so that the uniformity of cooling for each transformer can be further improved.

　（第４実施形態）
　以下に、第４実施形態に係る電力回路装置（以下においては、「電力回路装置５００」とする）の構成を説明する。ここでは、電力回路装置１００の構成と異なる点を主に説明し、重複する説明は繰り返さない。 (Fourth Embodiment)
Hereinafter, the configuration of the power circuit device (hereinafter referred to as “power circuit device 500”) according to the fourth embodiment will be described. Here, the points different from the configuration of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置５００は、一次側回路１０と、二次側回路２０と、トランス３０と、第１基板４０と、第２基板５０とを有している。トランス３１ａ～トランス３１ｅ、トランス３３ａ～トランス３３ｅ及びトランス３５ａ～トランス３５ｅは、それぞれ第１列Ｌ１をなすように配列されている。トランス３２ａ～トランス３２ｅ、トランス３４ａ～トランス３４ｅ及びトランス３６ａ～トランス３６ｅは、それぞれ第２列Ｌ２をなすように配列されている。これらの点に関して、電力回路装置５００の構成は、電力回路装置１００の構成と共通している。 The power circuit device 500 includes a primary side circuit 10, a secondary side circuit 20, a transformer 30, a first board 40, and a second board 50. The transformers 31a to 31e, the transformers 33a to 33e, and the transformers 35a to 35e are arranged so as to form the first row L1. The transformers 32a to 32e, the transformers 34a to 34e, and the transformers 36a to 36e are arranged so as to form the second row L2, respectively. In these respects, the configuration of the power circuit device 500 is common to the configuration of the power circuit device 100.

　図８Ａは、電力回路装置５００の斜視図である。図８Ｂは、電力回路装置５００の平面図である。図８Ｃは、電力回路装置５００の断面図である。図８Ｃには、図８Ａ中及び図８Ｂ中のＶＩＩＩＣ－ＶＩＩＩＣに対応した位置における断面が示されている。図８Ｃに示されるように、第１基板４０には、第１基板４０を厚さ方向に貫通している貫通穴４０ｃが形成されている。第２基板５０には、第２基板５０を厚さ方向に貫通している貫通穴５０ｃが形成されている。貫通穴４０ｃ及び貫通穴５０ｃは、平面視において、トランス３０に含まれる各々のトランスと重なる位置に形成されている。電力回路装置５００は、さらに、樹脂部材６０と、樹脂部材７０とを有している。これらの点に関して、電力回路装置５００の構成は、電力回路装置１００の構成と異なっている。 FIG. 8A is a perspective view of the power circuit device 500. FIG. 8B is a plan view of the power circuit device 500. FIG. 8C is a cross-sectional view of the power circuit device 500. FIG. 8C shows cross sections at positions corresponding to VIIIC-VIIIC in FIGS. 8A and 8B. As shown in FIG. 8C, the first substrate 40 is formed with a through hole 40c that penetrates the first substrate 40 in the thickness direction. The second substrate 50 is formed with a through hole 50c that penetrates the second substrate 50 in the thickness direction. The through hole 40c and the through hole 50c are formed at positions overlapping with each of the transformers included in the transformer 30 in a plan view. The power circuit device 500 further includes a resin member 60 and a resin member 70. In these respects, the configuration of the power circuit device 500 is different from the configuration of the power circuit device 100.

　樹脂部材６０は、第１部分６１と、第２部分６２と、第３部分６３とを有している。第１部分６１は、第１面４０ａ上にあり、かつトランス３０に含まれる各々のトランスに接している。すなわち、トランス３０に含まれる各々のトランスは、樹脂部材６０により第１基板４０に接着されていることになる。第２部分６２は、第２面４０ｂ上にある。第３部分６３は、貫通穴４０ｃ内に配置されているとともに、第１部分６１と第２部分６２とを接続している。第１部分６１及び第２部分６２における樹脂部材６０の外径は、貫通穴４０ｃの内径よりも大きい。 The resin member 60 has a first portion 61, a second portion 62, and a third portion 63. The first portion 61 is on the first surface 40a and is in contact with each of the transformers included in the transformer 30. That is, each transformer included in the transformer 30 is adhered to the first substrate 40 by the resin member 60. The second portion 62 is on the second surface 40b. The third portion 63 is arranged in the through hole 40c and connects the first portion 61 and the second portion 62. The outer diameter of the resin member 60 in the first portion 61 and the second portion 62 is larger than the inner diameter of the through hole 40c.

　樹脂部材７０は、樹脂部材６０と同様の構成を有している。樹脂部材７０は、第１部分７１と、第２部分７２と、第３部分７３とを有している。第１部分７１は、第２面５０ｂ上にあり、かつトランス３０に含まれる各々のトランスに接している（トランス３０に含まれる各々のトランスは、樹脂部材７０により第２基板５０に接着されている）。第２部分７２は、第１面５０ａ上にある。第３部分７３は、貫通穴５０ｃ内に配置されているとともに、第１部分７１と第２部分７２とを接続している。第１部分７１及び第２部分７２における樹脂部材７０の外径は、貫通穴５０ｃの内径よりも大きい。 The resin member 70 has the same configuration as the resin member 60. The resin member 70 has a first portion 71, a second portion 72, and a third portion 73. The first portion 71 is on the second surface 50b and is in contact with each transformer included in the transformer 30 (each transformer included in the transformer 30 is adhered to the second substrate 50 by the resin member 70). Yes). The second portion 72 is on the first surface 50a. The third portion 73 is arranged in the through hole 50c and connects the first portion 71 and the second portion 72. The outer diameter of the resin member 70 in the first portion 71 and the second portion 72 is larger than the inner diameter of the through hole 50c.

　樹脂部材６０及び樹脂部材７０は、樹脂材料により形成されている。この樹脂材料は、例えば、ポリプロピレン（ＰＰ）、アクリロニトリルブタジエンスチレン（ＡＢＳ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリカーボネート（ＰＣ）、フッ素樹脂、フェノール樹脂、メラミン樹脂、ポリウレタン、エポキシ樹脂、シリコーン等である。 The resin member 60 and the resin member 70 are made of a resin material. The resin material is, for example, polypropylene (PP), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), polycarbonate (PC), fluororesin, phenol resin, melamine resin, polyurethane, epoxy resin, silicone and the like.

　樹脂部材６０及び樹脂部材７０は、熱伝導性フィラーを含有しているポリブチレンテレフタレート（ＰＢＴ）、ポリフェニレンスルファイド（ＰＰＳ）又はポリエーテルエーテルケトン（ＰＥＥＫ）等により形成されていてもよい。 The resin member 60 and the resin member 70 may be formed of polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), or the like containing a heat conductive filler.

　以下に、電力回路装置５００の効果を説明する。ここでは、電力回路装置１００の効果と異なる点を主に説明し、重複する説明は繰り返さないものとする。 The effect of the power circuit device 500 will be described below. Here, the points different from the effect of the power circuit device 100 will be mainly described, and the duplicated description will not be repeated.

　電力回路装置５００では、トランス３０に含まれる各々のトランスにおいて発生した熱が、樹脂部材６０（樹脂部材７０）及び第１基板４０（第２基板５０）を介して周囲の空間へと放出されることになる。そのため、電力回路装置５００によると、放熱性能が改善される。電力回路装置５００では、トランス３０に含まれる各々のトランスが樹脂部材６０（樹脂部材７０）により第１基板４０（第２基板５０）に接着されている。そのため、電力回路装置５００によると、耐衝撃性を改善することができる。 In the power circuit device 500, the heat generated in each of the transformers included in the transformer 30 is released to the surrounding space via the resin member 60 (resin member 70) and the first substrate 40 (second substrate 50). It will be. Therefore, according to the power circuit device 500, the heat dissipation performance is improved. In the power circuit device 500, each transformer included in the transformer 30 is adhered to the first substrate 40 (second substrate 50) by the resin member 60 (resin member 70). Therefore, according to the power circuit device 500, the impact resistance can be improved.

　今回開示された実施形態は全ての点で例示であり、制限的なものではないと考えられるべきである。本開示の基本的な範囲は、上記の実施形態ではなく請求の範囲によって示され、請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 The embodiments disclosed this time are examples in all respects and should be considered not to be restrictive. The basic scope of the present disclosure is shown by the scope of claims rather than the embodiment described above, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

　１０　一次側回路、１１　接地端子、１２　入力端子、１３ａ，１３ｂ，１３ｃ，１３ｄ　入力側スイッチング素子、１４　入力コンデンサ、２０　二次側回路、２１　グランド端子、２２　出力端子、２３ａ，２３ｂ，２３ｃ，２３ｄ　出力側整流素子、２４　出力コンデンサ、３０　トランス、３１ａ，３１ｂ，３１ｃ，３１ｄ，３１ｅ，３２ａ，３２ｂ，３２ｃ，３２ｄ，３２ｅ，３３ａ，３３ｂ，３３ｃ，３３ｄ，３３ｅ，３４ａ，３４ｂ，３４ｃ，３４ｄ，３４ｅ，３５ａ，３５ｂ，３５ｃ，３５ｄ，３５ｅ，３６ａ，３６ｂ，３６ｃ，３６ｄ，３６ｅ　トランス、３７ａ　一次側コイル、３７ｂ　二次側コイル、３８　コア、３９　側面、４０　第１基板、４０ａ　第１面、４０ｂ　第２面、４０ｃ　貫通穴、５０　第２基板、５０ａ　第１面、５０ｂ　第２面、５０ｃ　貫通穴、６０　樹脂部材、６１　第１部分、６２　第２部分、６３　第３部分、７０　樹脂部材、７１　第１部分、７２　第２部分、７３　第３部分、１００，２００，３００，４００，５００　電力回路装置、ＤＲ１　第１方向、ＤＲ２　第２方向、ＤＲ３　第３方向、Ｌ１　第１列、Ｌ２　第２列、Ｌ３　第３列。 10 Primary circuit, 11 Ground terminal, 12 Input terminal, 13a, 13b, 13c, 13d Input side switching element, 14 Input capacitor, 20 Secondary circuit, 21 Ground terminal, 22 Output terminal, 23a, 23b, 23c, 23d Output side rectifying element, 24 output capacitors, 30 transformers, 31a, 31b, 31c, 31d, 31e, 32a, 32b, 32c, 32d, 32e, 33a, 33b, 33c, 33d, 33e, 34a, 34b, 34c, 34d, 34e, 35a, 35b, 35c, 35d, 35e, 36a, 36b, 36c, 36d, 36e transformer, 37a primary side coil, 37b secondary side coil, 38 core, 39 side surface, 40 first substrate, 40a first surface, 40b 2nd surface, 40c through hole, 50 2nd substrate, 50a 1st surface, 50b 2nd surface, 50c through hole, 60 resin member, 61 1st part, 62 2nd part, 63 3rd part, 70 resin member , 71 1st part, 72 2nd part, 73 3rd part, 100, 200, 300, 400, 500 Power circuit device, DR1 1st direction, DR2 2nd direction, DR3 3rd direction, L1 1st row, L2 2nd row, L3 3rd row.

Claims (9)

　第１方向において互いに間隔を空けて対向配置されている第１基板及び第２基板と、
　前記第１基板と前記第２基板との間に配置されており、かつ、前記第１方向に直交している第２方向に対して傾斜している第１列をなすように配列されている複数の第１トランスとを備える、電力回路装置。 The first substrate and the second substrate, which are arranged so as to face each other at a distance from each other in the first direction,
It is arranged between the first substrate and the second substrate, and is arranged so as to form a first row inclined with respect to the second direction orthogonal to the first direction. A power circuit device including a plurality of first transformers. 　前記第１基板と前記第２基板との間に配置されており、かつ、前記第２方向に対して傾斜している第２列をなすように配列されている複数の第２トランスとをさらに備え、
　前記第１方向及び前記第２方向に直交している第３方向における前記第１列と前記第２列との間の間隔は、前記第２方向における一方側から前記第２方向における他方側に向かうにしたがって拡がっている、請求項１に記載の電力回路装置。 Further, a plurality of second transformers arranged between the first substrate and the second substrate and arranged so as to form a second row inclined with respect to the second direction. Prepare,
The distance between the first row and the second row in the first direction and the third direction orthogonal to the second direction is from one side in the second direction to the other side in the second direction. The power circuit device according to claim 1, which is expanding toward the direction. 　前記第３方向から見たときに、前記第２トランスは、前記第１トランスに重なるように配置されており、
　前記第２方向から見たときに、前記第１トランスの各々は互いにずれて配置され、前記第２トランスの各々は互いにずれて配置されている、請求項２に記載の電力回路装置。 When viewed from the third direction, the second transformer is arranged so as to overlap the first transformer.
The power circuit device according to claim 2, wherein each of the first transformers is arranged so as to be offset from each other when viewed from the second direction, and each of the second transformers is arranged so as to be displaced from each other. 　隣り合う２つの前記第１トランスの間の前記第３方向における間隔は、前記第２方向における前記他方側から前記第２方向における前記一方側に向かうにしたがって拡がっている、請求項２又は請求項３に記載の電力回路装置。 Claim 2 or claim that the distance between the two adjacent first transformers in the third direction increases from the other side in the second direction toward the one side in the second direction. 3. The power circuit device according to 3. 　隣り合う２つの前記第１トランスの間の前記第３方向における間隔は、前記第２方向における前記他方側から前記第２方向における前記一方側に向かうにしたがって狭まっている、請求項２又は請求項３に記載の電力回路装置。 Claim 2 or claim that the distance between two adjacent first transformers in the third direction is narrowed from the other side in the second direction toward the one side in the second direction. 3. The power circuit device according to 3. 　隣り合う２つの前記第１トランスの間の前記第２方向における間隔は、前記第２方向における前記他方側から前記第２方向における前記一方側に向かうにしたがって拡がっている、請求項２～請求項５のいずれか１項に記載の電力回路装置。 Claims 2 to claim that the distance between the two adjacent first transformers in the second direction increases from the other side in the second direction toward the one side in the second direction. 5. The power circuit device according to any one of 5. 　前記第１トランスは、前記第２方向における前記一方側を向く側面を有し、
　前記側面は、前記第２方向に対して傾斜している、請求項２～請求項６のいずれか１項に記載の電力回路装置。 The first transformer has a side surface facing the one side in the second direction.
The power circuit device according to any one of claims 2 to 6, wherein the side surface is inclined with respect to the second direction. 　樹脂部材をさらに備え、
　前記第１基板は、前記第２基板側を向いている第１面と、前記第１面の反対面である第２面とを有し、
　前記第１基板には、平面視において前記第１トランスと重なる位置に貫通穴が形成されており、
　前記樹脂部材は、前記第１面上にあり、かつ、前記第１トランスに接している第１部分と、前記第２面上にある第２部分と、前記貫通穴内にあり、前記第１部分と前記第２部分とを接続している第３部分とを有する、請求項２～請求項７のいずれか１項に記載の電力回路装置。 With more resin members,
The first substrate has a first surface facing the second substrate side and a second surface opposite to the first surface.
A through hole is formed in the first substrate at a position overlapping the first transformer in a plan view.
The resin member is on the first surface and is in contact with the first transformer, the second portion on the second surface, and the first portion in the through hole. The power circuit device according to any one of claims 2 to 7, further comprising a third portion connecting the second portion and the second portion. 　前記第１基板と前記第２基板との間に配置されている複数のスイッチング素子及び複数の整流素子のいずれか一方又は両方をさらに備え、
　前記第１トランスは、第１領域に配置されており、
　前記スイッチング素子及び前記整流素子は、第２領域に配置されており、
　前記第１領域及び前記第２領域は、前記第２方向に沿って並んでいる、請求項１～請求項８のいずれか１項に記載の電力回路装置。 Further comprising one or both of a plurality of switching elements and a plurality of rectifying elements arranged between the first substrate and the second substrate.
The first transformer is arranged in the first region.
The switching element and the rectifying element are arranged in the second region.
The power circuit device according to any one of claims 1 to 8, wherein the first region and the second region are arranged along the second direction.
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