JP2024152456A - Electrical Equipment - Google Patents

Abstract

An electrical device is provided in which the intrusion of noise from a connector into wiring is suppressed.
[Solution] The electric device 1 comprises a substrate 18, an inverter 11, a motor 5, a motor bus bar 14, wiring 44, 45, 55, first connectors 40, 50, a second connector 30, and a housing 100 in which these are provided. The wiring has a conductor and an electromagnetic shield covering the conductor. The first connector connects the wiring to electrical components 3, 4. The second connector connects the inverter to a battery 2. A connector hole 34 is formed in the housing for passing the second connector through. A part of the motor bus bar is provided outside a projection area of the substrate in the thickness direction. A part of the motor bus bar and the connector hole are provided on the front side DP- of the substrate in the depth direction DP of the substrate. The first connector is provided on the back side DP+ of the substrate in the depth direction.
[Selected figure] Figure 2

Description

The disclosure herein relates to electrical equipment.

The power conversion device of Patent Document 1 includes a semiconductor module, a control circuit board, a control connector, and an output connector. The semiconductor module is connected to a high-voltage DC power supply and an AC load. The control circuit board controls the switching operation of the semiconductor module. The control connector connects the low-voltage DC power supply and the control circuit board, and also connects an external control device and the control circuit board, and is connected to the low-voltage DC power supply. The output connector is connected to the semiconductor module and the AC load.

JP 2016-77044 A

The semiconductor module and control circuit board are housed in the case of the power conversion device. A control connector is provided on the longitudinal wall of the case. An output connector is provided on the transverse wall of the case. If the control connector and output connector are close to each other, radiation noise emitted from the current flowing through the output connector can easily enter the connector terminal of the control connector, and there is a risk that the noise entering the connector terminal will not meet the standards.

The objective of this disclosure is to provide electrical equipment that prevents noise from entering the wiring from the connector.

According to one aspect of the present disclosure, there is provided an electrical device comprising:
A plate-shaped substrate (18);
an inverter (11) overlapping the substrate in a thickness direction (TD) of the substrate and electrically connected to the substrate;
a motor (5) overlapping the inverter in a thickness direction and electrically connected to the inverter;
a motor bus bar (14) electrically connecting the inverter and the motor;
Wiring (44, 45, 55) having a conductor and an electromagnetic shield covering the conductor and electrically connected to the substrate;
a first connector (40, 50) for electrically connecting the wiring and the electrical component (3, 4);
a second connector (30) that electrically connects the inverter and the battery (2);
a housing (100) in which a substrate, an inverter, a motor, a motor bus bar, wiring, a first connector, and a second connector are provided;
A connector hole (34) for passing a second connector through is formed in the housing;
A part of the motor bus bar is provided outside a projected area of the substrate in a thickness direction;
A part of the motor bus bar and the connector hole are provided on the front side (DP-) of the substrate in the depth direction (DP) of the substrate,
The first connector is provided on the back side (DP+) of the board in the depth direction.

This makes it easier to prevent noise radiated from the portion of the motor bus bar (14) located on the front side (DP-) of the substrate (18) and from the second connector (30) from entering the first connector (40, 50) through the space in the housing (100). It also makes it easier to prevent noise from entering the wiring (44, 45, 55) from the first connector.

The reference numbers in parentheses above merely indicate the corresponding relationship to the configurations described in the embodiments described below, and do not limit the technical scope in any way.

FIG. 2 is an electrical circuit diagram of an in-vehicle system including electrical equipment. 11 is a plan view of the electrical device when the second storage space is viewed from above in the thickness direction. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2.

Below, several embodiments for implementing the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment may be given the same reference numerals, and duplicated explanations may be omitted. In each embodiment, when only a part of the configuration is described, the other embodiment described previously may be applied to the other parts of the configuration.

In addition to combinations of parts that are explicitly stated as possible in each embodiment, it is also possible to partially combine embodiments together, embodiments and variations, and variations together, even if not explicitly stated, as long as there are no particular problems with the combination.

First Embodiment
<Electrical Equipment>
Fig. 1 is a schematic diagram of an in-vehicle system 1 equipped with an electric device 10. The components equipped in the in-vehicle system 1 will be described with reference to Fig. 1. The in-vehicle system 1 is equipped with a high-voltage battery 2, a low-voltage battery 3, a control device 7, and an electric device 10. The in-vehicle system 1 in Fig. 1 is mounted on a vehicle. The electric device 10 has an inverter 11, a motor generator 4, a physical quantity sensor 6, a gear device 5, and a drive shaft 8. The vehicle is a hybrid vehicle capable of running by switching between and/or combining the driving force of an engine and the driving force of the motor generator 4.

The electrical device 10 further includes a P-side high-voltage wiring, an N-side high-voltage wiring, a connecting bus bar 14, wiring 44, 45, 55, a control circuit board 18, a smoothing capacitor 20, a high-voltage connector 30, low-voltage connectors 40, 50, a cooler 60, and a housing 100 that holds and houses them. The P-side high-voltage wiring is a wiring that is connected to the positive electrode of the high-voltage battery 2. The N-side high-voltage wiring is a wiring that is connected to the negative electrode of the high-voltage battery 2. The P-side high-voltage wiring is composed of conductive members such as a P-side bus bar 110. The N-side high-voltage wiring is composed of conductive members such as an N-side bus bar 120. The connecting bus bar 14 is a bus bar that electrically connects the inverter 11 and the motor generator 4. The connecting bus bar 14 may be referred to as a motor bus bar. The low-voltage connectors 40, 50 may be referred to as a first connector. The high-voltage connector 30 may be referred to as a second connector.

The wiring 44, 45, 55 is a wiring that is electrically connected to the control circuit board 18. The wiring 44, 45, 55 has a conductor for transmitting a signal, a covering member that covers the conductor, and an electromagnetic shielding material between the conductor and the covering member. As an example of the electromagnetic shield, copper or aluminum is used. The conductor is covered with the electromagnetic shielding material. Covering the conductor with an electromagnetic shield makes it difficult for external noise to be carried by the conductor. The electromagnetic shielding material makes it difficult for the signal flowing through the conductor to be affected by noise. The wiring 44, 45, 55 has a power supply wiring 44, a control wiring 45, a first sensor wiring 53, and a second sensor wiring 54. The first sensor wiring 53 and the second sensor wiring 54 may be collectively referred to as sensor wiring 55. Details of the wiring 44, 45, 55 will be described later.

The inverter 11 is connected to the P-side bus bar 110 and the N-side bus bar 120. The inverter 11 has a plurality of semiconductor modules 12. Each semiconductor module 12 has two switching elements 13 and two diodes 13A. The two switching elements 13 are connected in series between the P-side bus bar 110 and the N-side bus bar 120.

The P-side input terminal 11A connected to the P-side bus bar 110 is connected to the collector electrode of one of the two switching elements 13 that is provided on the high potential side. The N-side input terminal 11B connected to the N-side bus bar 120 is connected to the emitter electrode of one of the two switching elements 13 that is provided on the low potential side. The anode of the diode 13A is connected to the emitter electrode of the corresponding switching element 13. The cathode of the diode 13A is connected to the collector electrode of the corresponding switching element 13.

An output terminal 11C connected to the motor generator 4 is connected to the emitter electrode of the P-side switching element 13 and the collector electrode of the N-side switching element 13. The multiple switching elements 13 convert DC power supplied from the high-voltage battery 2 into AC power capable of driving the motor generator 4. The converted power is supplied to the motor generator 4 via a connecting bus bar 14. In addition, a gate terminal 11D of the P-side switching element 13 and a gate terminal 11D of the N-side switching element 13 are electrically and mechanically connected to a control circuit board 18 via solder.

The control circuit is mounted on the control circuit board 18. The control circuit includes a microcomputer. As described above, the control circuit board 18 is connected to the low-voltage battery 3. The low-voltage battery 3 supplies the control circuit board 18 with operating power for operating the microcomputer. The microcomputer includes a CPU, memory, and the like. The control circuit generates a drive command for operating the switching element 13 based on the torque request input from the control device 7 and the signal detected by the physical quantity sensor 6. The control circuit outputs, for example, a PWM signal as the drive command.

The smoothing capacitor 20 mainly smoothes the DC voltage supplied from the high-voltage battery 2. The smoothing capacitor 20 is connected to the P-side bus bar 110 and the N-side bus bar 120. The smoothing capacitor 20 is connected in parallel to the inverter 11. The PN bus bars 110 and 120 electrically connect the inverter 11, the smoothing capacitor 20, and the high-voltage battery 2.

The high-voltage connector 30 is a connector that electrically connects the high-voltage battery 2 and the inverter 11. High-voltage power is supplied from the high-voltage battery 2 to the inverter 11 via the high-voltage connector 30. The high-voltage connector 30 has a conductive terminal 32 and a resin member 31 that seals and fixes a part of the terminal 32. A high-voltage power wiring 33 that connects to the high-voltage battery 2 is connected to one end of the terminal 32. The PN bus bars 110 and 120 are connected to the other end of the terminal 32. High-voltage power is supplied from the high-voltage battery 2 to the inverter 11 via the high-voltage power wiring 33, the high-voltage connector 30, and the PN bus bars 110 and 120.

The first low-voltage connector 40 is a connector that electrically connects the low-voltage battery 3 and the control circuit board 18, and also electrically connects the control device 7, which is a higher-level ECU, to the control circuit board 18. Low-voltage power is supplied from the low-voltage battery 3 to the control circuit board 18 via the first low-voltage connector 40, and a control signal is transmitted from the control device 7. The control circuit cooperates with the control device 7 to control the inverter 11 and auxiliary equipment included in the vehicle.

The first low-voltage connector 40 has a conductive terminal 42 and a resin member 41 that seals and fixes a portion of the terminal 42. A low-voltage power wiring 43 that connects to the low-voltage battery 3 and the control device 7 is connected to one end of the terminal 42. A power supply wiring 44 and a control wiring 45 that connect to the control circuit board 18 are connected to the other end of the terminal 42. A low-voltage power is supplied from the low-voltage battery 3 to the control circuit board 18 via the low-voltage power wiring 43, the first low-voltage connector 40, and the power supply wiring 44. A control signal is sent from the control device 7 to the control circuit board 18 via the low-voltage power wiring 43, the first low-voltage connector 40, and the control wiring 45.

The second low-voltage connector 50 is a connector that electrically connects the physical quantity sensor 6 and the control circuit board 18. The second low-voltage connector 50 may simply be referred to as a sensor connector. The physical quantity sensor 6 is provided in the motor generator 4. The control circuit has a function of acquiring a signal related to the physical quantity of the motor generator 4 from the physical quantity sensor 6. As an example, the physical quantity sensor 6 is a resolver that detects a signal related to the rotation speed of the motor generator 4. Note that the physical quantity sensor 6 is not limited to a resolver. As an example, the physical quantity sensor 6 may be a temperature sensor that detects a signal related to the temperature emitted by the motor generator 4. The physical quantity sensor 6 may be any detector that detects a signal related to the physical quantity of the motor generator 4.

The second low-voltage connector 50 has a conductive terminal 52 and a resin member 51 that seals and fixes a portion of the terminal 52. A first sensor wire 53 that is connected to the physical quantity sensor 6 is connected to one end of the terminal 52. A second sensor wire 54 that is connected to the control circuit board 18 is connected to the other end of the terminal 52. A signal related to the physical quantity of the motor generator 4 is transmitted from the physical quantity sensor 6 to the control circuit board 18 via the first sensor wire 53, the second low-voltage connector 50, and the second sensor wire 54.

In the drawings, a simplified form is shown in which the first sensor wiring 53 and the second sensor wiring 54 are connected to one second low-voltage connector 50. The second low-voltage connector 50 may have a male connector and a female connector, and may be configured by fitting the male connector and the female connector together. The first sensor wiring 53 may be connected to the male connector, the second sensor wiring 54 may be connected to the female connector, and the male connector and the female connector may be fitted together to electrically connect the physical quantity sensor 6 and the control circuit board 18.

The cooler 60 is a device that cools multiple semiconductor modules 12. The multiple semiconductor modules 12 and the cooler 60 constitute a power module 70. The cooler 60 has a layered cooling structure. The cooler 60 includes a supply pipe 61, a discharge pipe 62, and multiple relay pipes 63. The multiple relay pipes 63 are arranged in a ladder shape between the supply pipe 61 and the discharge pipe 62. The supply pipe 61 and the discharge pipe 62 are connected via the relay pipe 63 in a manner that allows the refrigerant to flow.

The semiconductor modules 12 are individually housed between adjacent relay pipes 63. The semiconductor modules 12 are sandwiched between adjacent relay pipes 63. The semiconductor modules 12 are housed in the cooler 60 to form a power module 70. Heat from the semiconductor modules 12 is easily dissipated efficiently to the relay pipes 63.

<Mechanical structure of electrical equipment>
Hereinafter, in constructing the mechanical structure of the electric device 10, the thickness direction of the control circuit board 18 may be referred to as the thickness direction TD. The control circuit board 18 has a plate shape with a small thickness in the thickness direction TD. The control circuit board 18 extends along a plane that spreads in two directions perpendicular to the thickness direction TD. The two directions perpendicular to the thickness direction TD may be referred to as the width direction WD and the depth direction DP. The thickness direction TD, the width direction WD, and the depth direction DP are three directions perpendicular to each other. FIG. 2 is a plan view of the electric device 10. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. 2.

The housing 100 has a bottom wall 130, a frame 140, a top wall 150, and a partition wall 160. The bottom wall 130, the frame 140, the top wall 150, and the partition wall 160 are made of metal members. The frame 140 has an annular wall that opens in the thickness direction TD. The frame 140 has a length in the thickness direction TD. The frame 140 has a first wall portion 141 and a third wall portion 143 that are spaced apart in the width direction WD, and a second wall portion 142 and a fourth wall portion 144 that are spaced apart in the depth direction DP. The first wall portion 141 to the fourth wall portion 144 are provided continuously in this order in a clockwise direction. The frame 140 has an annular shape with a portion that is convex in the width direction WD when viewed from the thickness direction TD.

One side in the width direction WD may be referred to as one width direction side WD-. The other side in the width direction WD may be referred to as the other width direction side WD+. The front side in the depth direction DP may be referred to as the front depth direction side DP-. The rear side in the depth direction DP may be referred to as the rear depth direction side DP+. A first wall portion 141 is provided on one width direction side WD-. A third wall portion 143 is provided on the other width direction side WD+. A fourth wall portion 144 is provided on the front depth direction side DP-, and a second wall portion 142 is provided on the rear depth direction side DP+.

The end of the second wall 142 on one widthwise side WD- is connected to the end of the first wall 141 on the depthwise rear side DP+. The end of the second wall 142 on the other widthwise side WD+ is connected to the end of the third wall 143 on the depthwise rear side DP+. The end of the fourth wall 144 on one widthwise side WD- is connected to the end of the first wall 141 on the depthwise front side DP-. The end of the fourth wall 144 on the other widthwise side WD+ is connected to the end of the third wall 143 on the depthwise front side DP-. The other end of the second wall 142 on the other widthwise side WD+ is located further on the other widthwise side WD+ than the other end of the fourth wall 144 on the other widthwise side WD+.

The third wall portion 143 has a first continuous wall portion 143A, a second continuous wall portion 143B, and a third continuous wall portion 143C, which are continuous from the second wall portion 142 to the fourth wall portion 144. One end of the first continuous wall portion 143A is connected to the end of the second wall portion 142 on the other width direction side WD+. One end of the third continuous wall portion 143C is connected to the end of the fourth wall portion 144 on the other width direction side WD+. The other end of the first continuous wall portion 143A is connected to one end of the second continuous wall portion 143B. The other end of the third continuous wall portion 143C is connected to the other end of the second continuous wall portion 143B. The third continuous wall portion 143C may be referred to as a first extension portion. The second continuous wall portion 143B may be referred to as a third extension portion. The first continuous wall portion 143A may be referred to as the second extension portion.

The first continuous wall portion 143A extends in the depth direction DP from the depth direction rear side DP+ to the depth direction front side DP-. The third continuous wall portion 143C extends in the depth direction DP from the depth direction rear side DP+ to the depth direction front side DP-. The other end of the first continuous wall portion 143A in the depth direction DP is positioned at the same position as the other end of the third continuous wall portion 143C in the depth direction DP. The second continuous wall portion 143B extends in the width direction WD to connect the other end of the first continuous wall portion 143A and the other end of the third continuous wall portion 143C.

The first continuous wall portion 143A is provided on the other width direction side WD+ than the third continuous wall portion 143C. The portion of the second wall portion 142 on the other width direction side WD+ and the second continuous wall portion 143B are disposed opposite each other in the depth direction DP. The portion of the second wall portion 142 on the other width direction side WD+, the first continuous wall portion 143A, and the second continuous wall portion 143B form a convex portion 146 that protrudes to the other width direction side WD+. The portion of the frame 140 excluding the convex portion 146 may be referred to as a main portion 145. The frame 140 has the main portion 145 and the convex portion 146. The main portion 145 and the convex portion 146 are continuous and made of the same material.

The upper side in the thickness direction TD may be referred to as the thickness direction upper side TD+. The lower side in the thickness direction TD may be referred to as the thickness direction lower side TD-. The bottom wall 130 is connected to the thickness direction lower side TD- of the frame 140. The top wall 150 is connected to the thickness direction upper side TD+ of the frame 140. The bottom wall 130 and the top wall 150 have a thin plate shape in the thickness direction TD. The bottom wall 130 and the top wall 150 extend along a plane that extends in two directions perpendicular to the thickness direction TD.

The bottom wall 130, frame 140, and top wall 150 define a space in which the inverter 11, control circuit board 18, motor generator 4, gear device 5, drive shaft 8, various wiring, and second low-voltage connector 50 are stored. The various wiring includes power supply wiring 44, control wiring 45, first sensor wiring 53, and second sensor wiring 54. The high-voltage connector 30 and the first low-voltage connector 40 are attached to the corresponding walls 142, 144, respectively.

The fourth wall portion 144 is provided with a high-voltage connector hole 34 for passing the high-voltage connector 30. By passing the terminal 32 of the high-voltage connector 30 through the high-voltage connector hole 34 and connecting the terminal 32 to the PN bus bars 110, 120 inside the housing 100, high-voltage power is supplied from the high-voltage battery 2 to the PN bus bars 110, 120. The second wall portion 142 is provided with a first low-voltage connector hole 46 for passing the first low-voltage connector 40. The terminal 42, power supply wiring 44, and control wiring 45 pass through the first low-voltage connector hole 46, and the wiring 44, 45 are connected to the control circuit board 18, so that low-voltage power and control signals are supplied from the low-voltage battery 3 and the control device 7 to the control circuit board 18.

A partition wall 160 is connected to the inner surface 140A of the frame 140. The frame 140 and the partition wall 160 are mechanically connected by, for example, bolts (not shown). The frame 140 and the partition wall 160 may be continuous by the same member. The partition wall 160 is provided between the end on the upper side TD+ in the thickness direction TD and the end on the lower side TD- in the thickness direction TD.

The partition wall 160 divides the space of the housing 100 into a first storage space 101 on the lower side TD- in the thickness direction, and a second storage space 102 on the upper side TD+ in the thickness direction. More specifically, the first storage space 101 is divided by the bottom wall 130, the portion of the frame 140 on the lower side TD- in the thickness direction, and the partition wall 160. The second storage space 102 is divided by the top wall 150, the portion of the frame 140 on the upper side TD+ in the thickness direction, and the partition wall 160.

As an example, the partition wall 160 has a first partition 161, a second partition 162, and a third partition 163. The first partition 161 is a portion connected to the inner surface 140A of the main portion 145. The second partition 162 is a portion connected to the inner surface 140A of the protrusion 146. With respect to the thickness direction TD, the second partition 162 is provided on the upper side TD+ in the thickness direction than the first partition 161. The third partition 163 is a portion connecting the first partition 161 and the second partition 162. The second partition 162 extends in the thickness direction TD. The first partition 161, the second partition 162, and the third partition 163 may be continuous and made of the same material, or the first partition 161, the second partition 162, and the third partition 163 may be separate and connected by a fastening member or the like.

The partition wall 160 is provided with a busbar hole 164 for passing the connecting busbar 14 and a second low-voltage connector hole 165 for passing the second low-voltage connector 50. The busbar hole 164 is provided in the first partition wall 161. The second low-voltage connector hole 165 is provided in the second partition wall 162. The connecting busbar 14 passes through the busbar hole 164. The second low-voltage connector 50 is provided in the second low-voltage connector hole 165. As an example, the busbar hole 164 is set to a size that allows the connecting busbar 14 to pass through. The second low-voltage connector hole 165 is set to a size that allows the second low-voltage connector 50 to pass through. The connecting busbar 14 passes through the busbar hole 164 and extends across the first storage space 101 and the second storage space 102. The second low-voltage connector 50 is provided between the first storage space 101 and the second storage space 102 through the second low-voltage connector hole 165.

The connecting bus bar 14 also has a first connecting bus bar 15 connected to the motor generator 4 and a second connecting bus bar 16 connected to the inverter 11. The first connecting bus bar 15 extends in the thickness direction TD across the first storage space 101 and the second storage space 102. The second connecting bus bar 16 extends in the second storage space 102 so as to move away from the inverter 11. The first connecting bus bar 15 and the second connecting bus bar 16 are electrically and mechanically connected via fastening members such as bolts.

<First storage space>
The first storage space 101 accommodates the motor generator 4, the gear device 5, the drive shaft 8, a portion of the first connecting bus bar 15, a portion of the second low-voltage connector 50, and the first sensor wiring 53. The motor generator 4 includes a motor section 4A including a rotor and a stator (windings), and a motor shaft 4B. The motor section 4A may be referred to as a drive section. The motor shaft 4B may be referred to as a shaft section.

The motor shaft 4B is the rotating shaft of the motor unit 4A. The motor shaft 4B extends along the depth direction DP. The rotor of the motor unit 4A is fixed to the motor shaft 4B. The stator of the motor unit 4A is electrically connected to the power module 70, etc., via the connecting bus bar 14, etc. The motor unit 4A is driven to rotate by the power supplied from the inverter 11.

The gear device 5 has a first gear 5A and a second gear 5B. The first gear 5A is a helical gear or a planetary gear that is passed through the motor shaft 4B. The motor section 4A and the first gear 5A are passed through the motor shaft 4B so that the motor section 4A and the first gear 5A are aligned in the depth direction DP. The second gear 5B is a helical gear or a differential gear that is passed through the drive shaft 8. The second low-voltage connector 50, the motor shaft 4B, and the drive shaft 8 are arranged side by side in the width direction WD.

The second low-voltage connector 50 is provided on the other widthwise side WD+ of the motor shaft 4B. The drive shaft 8 is provided on one widthwise side WD- of the motor shaft 4B. The second low-voltage connector 50 does not overlap with the motor generator 4, drive shaft 8, and gear device 5 in the thickness direction TD. The motor generator 4 is provided between the drive shaft 8 and the second low-voltage connector 50 in the width direction WD. The first gear 5A and the second gear 5B mesh with each other, transmitting power from the motor section 4A to the engine.

<Second storage space>
The control circuit board 18, the smoothing capacitor 20, the power module 70, the bus bars 14, 110, 120, the remainder of the second low-voltage connector 50, and the wiring 44, 45, 54 are provided in the second storage space 102. The first low-voltage connector 40 is provided in a portion of the second wall portion 142 that defines the second storage space 102. The high-voltage connector 30 is provided in a portion of the fourth wall portion 144 that defines the second storage space 102.

The bus bars 14, 110, and 120 refer to the remainder of the first connecting bus bar 15, the second connecting bus bar 16, the P-side bus bar 110, and the N-side bus bar 120. The wiring 44, 45, and 54 refer to the power supply wiring 44, the control wiring 45, and the second sensor wiring 54.

The second low-voltage connector 50 is provided in the space surrounded by the protrusion 146 in the second storage space 102. The other components described above, except for the second low-voltage connector 50, are provided in the space surrounded by the main portion 145 in the second storage space 102.

The control circuit board 18 extends along a plane along the width direction WD and the depth direction DP. As an example, the length of the control circuit board 18 in the width direction WD is approximately the same as the length of the fourth wall portion 144 in the width direction WD. As an example, the length of the control circuit board 18 in the depth direction DP is slightly shorter than the length of the third continuous wall portion 143C in the depth direction DP.

The control circuit board 18 has a substantially rectangular shape when viewed from the thickness direction TD. The control circuit board 18 has a first edge 18A and a third edge 18C spaced apart in the width direction WD, and a second edge 18B and a fourth edge 18D spaced apart in the depth direction DP. The first edge 18A extends in the depth direction DP while facing the first wall 141. The second edge 18B extends in the width direction WD while facing the second wall 142. The third edge 18C extends in the depth direction DP while facing the third wall 153. The fourth edge 18D extends in the width direction WD while facing the fourth wall 154.

The control circuit board 18 is disposed closer to the fourth wall 144 in the space enclosed by the main portion 145. In other words, the control circuit board 18 is disposed closer to the fourth wall 144 in the depth direction DP than the second continuous wall 143B in the space enclosed by the main portion 145. The control circuit board 18 is disposed closer to the front side DP- in the depth direction than the protrusion 146. In addition, a space is provided between the fourth edge portion 18D and the fourth wall portion 144 in which terminals and fastening members for electrical connection can be placed.

The smoothing capacitor 20, the power module 70, and the bus bars 14, 110, and 120 are provided on the lower side TD- of the control circuit board 18 in the thickness direction. These are provided on the partition wall 160 side of the control circuit board 18 in the thickness direction TD. These overlap the control circuit board 18 in the thickness direction TD. As described above, the motor generator 4 and the gear device 5 are provided in the first storage space 101. The motor generator 4 and the gear device 5 overlap the power module 70 and the control circuit board 18 on the lower side TD- of the thickness direction. The control circuit board 18, the power module 70, the motor generator 4, and the gear device 5 are arranged in this order from the upper side TD+ to the lower side TD- in the thickness direction TD. Although not shown, a metal plate-shaped member is provided between the control circuit board 18 and the power module 70. The control circuit board 18 is attached to the plate-shaped member. The plate-shaped member has an electromagnetic shielding function.

Furthermore, wiring 44, 45 extend from the second edge 18B side of the control circuit board 18 toward the first low-voltage connector 40. The second sensor wiring 54 extends from the second edge 18B side toward the second low-voltage connector 50. From the fourth edge 18D side of the control circuit board 18, the connection portion of the second connecting bus bar 16 with the first connecting bus bar 15 and the connection portion of the PN bus bars 110, 120 with the high-voltage connector 30 extend toward the fourth wall portion 144. In the space between the fourth edge 18D and the fourth wall portion 144, the connection portion of the second connecting bus bar 16 with the first connecting bus bar 15 and the connection portion of the PN bus bars 110, 120 with the high-voltage connector 30 are provided.

The connection portion of the PN busbars 110 and 120 with the high-voltage connector 30 is provided outside the projection area of the control circuit board 18 in the thickness direction TD. The connection portion of the second connecting busbar 16 with the first connecting busbar 15 is provided outside the projection area of the control circuit board 18 in the thickness direction TD. The connection portion of the PN busbars 110 and 120 with the high-voltage connector 30 is sometimes referred to as the PN exposed portion 111, 121 because it is exposed from the projection area of the control circuit board 18. The PN exposed portion 111, 121 can also be said to be a part of the PN busbars 110 and 120. The connection portion of the first connecting busbar 15 and the second connecting busbar 16 in the second storage space 102 is sometimes referred to as the front portion 17 because it is provided on the front side DP- in the depth direction from the control circuit board 18. The front portion 17 can also be said to be a part of the connecting busbar 14. The front side portion 17 is provided outside the projection area in the thickness direction TD of the control circuit board 18. The front side portion 17 can also be said to be a portion exposed from the projection area in the thickness direction TD of the control circuit board 18 to the front side DP- in the depth direction.

In the space between the fourth edge 18D and the fourth wall 144, the PN exposed portions 111, 121 and the front portion 17 are arranged side by side in the width direction WD. The PN exposed portions 111, 121 are arranged on one side in the width direction WD- of the front portion 17. The front portion 17 is arranged on the other side in the width direction WD+ of the PN exposed portions 111, 121. The PN exposed portions 111, 121 and the front portion 17 are arranged on the near side DP- in the depth direction of the fourth edge 18D. The PN exposed portions 111, 121 and the front portion 17 are arranged in the gap between the fourth edge 18D and the fourth wall 144.

The high-voltage connector 30 is passed through the high-voltage connector hole 34 provided in the fourth wall portion 144. The terminals 32 of the high-voltage connector 30 are connected to the PN exposed portions 111, 121. In the width direction WD, the front side portion 17 is provided on the other width direction side WD+ than the high-voltage connector 30 and the high-voltage connector hole 34. The PN exposed portions 111, 121, the front side portion 17, the high-voltage connector 30, and the high-voltage connector hole 34 are provided on the depth direction front side DP- than the fourth edge portion 18D of the control circuit board 18. It can also be said that the PN exposed portions 111, 121, the front side portion 17, the high-voltage connector 30, and the high-voltage connector hole 34 are provided on the fourth wall portion 144 side than the fourth edge portion 18D of the control circuit board 18.

As described above, the wiring 44, 45 extend from the second edge 18B toward the first low-voltage connector 40. The second sensor wiring 54 extends from the second edge 18B toward the second low-voltage connector 50. The first low-voltage connector 40 and the first low-voltage connector hole 46 are provided on the other DP+ side in the depth direction relative to the second edge 18B. The second low-voltage connector 50 is also provided on the deeper DP+ side in the depth direction relative to the second edge 18B.

The first low-voltage connector 40, the second low-voltage connector 50, the wiring 44, 45, 54, the first low-voltage connector hole 46, and the second low-voltage connector hole 165 are provided on the other depth direction side DP+ from the second edge 18B of the control circuit board 18. The first low-voltage connector 40, the second low-voltage connector 50, the wiring 44, 45, 54, the first low-voltage connector hole 46, and the second low-voltage connector hole 165 are provided on the second wall portion 142 side from the second edge 18B of the control circuit board 18.

The front side portion 17 has a U-phase connection exposed portion connected to the U-phase, a V-phase connection exposed portion connected to the V-phase, and a W-phase connection exposed portion connected to the W-phase. The connection exposed portions of the three phases are arranged side by side in the width direction WD. As described above, the second low-voltage connector 50 is provided on the protruding portion 146. The second low-voltage connector 50 is rectangular when viewed from the thickness direction TD. With respect to the thickness direction TD, the second low-voltage connector 50 has a length in the width direction WD and the depth direction DP. The second low-voltage connector 50 has four corners. Of the four corners of the second low-voltage connector 50, one provided on one side WD- in the width direction and the rear side DP+ in the depth direction may be referred to as the first corner portion 50A. Of the four corners of the second low-voltage connector 50, one provided on the other side WD+ in the width direction and the front side DP- in the depth direction may be referred to as the second corner portion 50B.

The straight line connecting the end of the high-voltage connector hole 34 on the one side in the width direction WD- and the first corner 50A may be referred to as the straight line L1. The straight line connecting the end of one of the three front portions 17 on the other side in the width direction WD+, which is located on the other side in the width direction WD+, and the second corner 50B may be referred to as the straight line L2. In this embodiment, a part of the second continuous wall portion 143B and a part of the third continuous wall portion 143C are provided in the intermediate region MA between the straight lines L1 and L2. A part of the second continuous wall portion 143B extends toward the straight line L2 side in the width direction WD in the intermediate region MA. A part of the third continuous wall portion 143C extends from the end of the second continuous wall portion 143B on the one side in the width direction WD- toward the straight line L1 side in the depth direction DP.

<Action and effect>
The electrical device 10 includes a control circuit board 18, an inverter 11, a motor generator 4, a connecting bus bar 14, wiring 44, 45, 55, a first low-voltage connector 40, a second low-voltage connector 50, and a housing 100 in which these are provided. The control circuit board 18 has a plate shape that is thin in the thickness direction TD. The inverter 11 is electrically connected to the high-voltage battery 2 and the control circuit board 18. The inverter 11 overlaps the control circuit board 18 with respect to the thickness direction TD. The motor generator 4 overlaps the motor generator 4 with respect to the thickness direction TD.

The wiring 44, 45, 55 are electrically connected to the control circuit board 18. The wiring 44, 45, 55 has a conductor for transmitting a signal, a covering material for covering the conductor, and an electromagnetic shielding material between the conductor and the covering material. The conductor is covered with the electromagnetic shielding material. The connecting bus bar 14 is a bus bar that electrically connects the inverter 11 and the motor generator 4. The low-voltage connectors 40, 50 are connectors that electrically connect the wiring 44, 45, 55 and the electrical components 3, 4. The housing 100 is formed with a high-voltage connector hole 34 for passing the high-voltage connector 30 that supplies current from the high-voltage battery 2 to the inverter 11. The electrical components 3, 4 correspond to the low-voltage battery 3 and the control device 7.

A part of the connecting bus bar 14 is provided outside the projection area of the control circuit board 18 in the thickness direction TD. A part of the connecting bus bar 14 and the high-voltage connector hole 34 are provided on the front side DP- of the control circuit board 18 in the depth direction DP of the control circuit board 18. The low-voltage connectors 40, 50 are provided on the rear side DP+ of the control circuit board 18 in the depth direction DP. This ensures that the distance between the part of the connecting bus bar 14 provided on the front side of the control circuit board 18, the high-voltage connector 30, and the low-voltage connectors 40, 50 is longer than the length of the control circuit board 18 in the depth direction DP.

The portion of the connecting busbar 14 provided in front of the control circuit board 18 is sometimes referred to as the front portion 17 because it is the portion exposed from the projection area in the thickness direction of the control circuit board 18. The current flowing in the front portion 17 and the radiated noise emitted from the current flowing in the high-voltage connector 30 are more likely to be prevented from entering the low-voltage connectors 40, 50 through the space in the housing 100. The noise is more likely to be prevented from entering the wiring 44, 45, 55 from the low-voltage connectors 40, 50.

The connecting busbar 14 is a current path through which high-voltage current flows between the inverter 11 and the motor generator 4. The front side portion 17 is a portion through which high-voltage current flows on the motor generator 4 side. In addition to the high-voltage current, noise current may also be contained in the connecting busbar 14. The high-voltage connector 30 is a current path through which high-voltage current flows between the high-voltage battery 2 and the inverter 11. The high-voltage connector hole 34 is an entrance through which the high-voltage current enters the housing 100. In addition to the high-voltage current, noise current may also be contained in the high-voltage connector 30. The noise current flowing through the connecting busbar 14 and the high-voltage connector 30 may be radiated into the space of the housing 100 as radiated noise.

If radiated noise gets into the wiring 44, 45, 55, it may no longer meet EMC standards. To prevent radiated noise from getting into the wiring 44, 45, 55, the conductors of the wiring 44, 45, 55 are covered with electromagnetic shielding material. This prevents radiated noise from directly getting into the wiring 44, 45, 55. However, the wiring 44, 45, 55 has low-voltage connectors 40, 50 at the ends.

The low-voltage connectors 40, 50 are made of metal terminals 42, 52 and resin members 41, 51 that cover and secure the terminals 42, 52. Radiation noise can pass through the resin members 41, 51. Therefore, radiation noise can pass through the resin members 41, 51 and enter the terminals 42, 52. Noise can enter the wiring 44, 45, 55 from the terminals 42, 52. This can result in the EMC standard not being met. Therefore, in this embodiment, the radiation noise is prevented from entering the terminals 42, 52, thereby preventing noise from entering the wiring 44, 45, 55.

The housing 100 has an annular frame 140 that opens in the thickness direction TD, and a partition wall 160 that is connected to the inner surface 140A of the frame 140 and partitions the space surrounded by the frame 140 in the thickness direction TD. The motor generator 4 is stored in a first storage space 101 partitioned by a part of the frame 140 and the partition wall 160. The inverter 11 and the control circuit board 18 are stored in a second storage space 102 partitioned by the remainder of the frame 140 and the partition wall 160. A bus bar hole 164 is formed in the partition wall 160 to pass the connecting bus bar 14 through. The connecting bus bar 14 is provided through the bus bar hole 164 to span the first storage space 101 and the second storage space 102.

The high-voltage connector hole 34, the front portion 17, at least a portion of the low-voltage connectors 40, 50, and the wiring 44, 45, 55 are provided in the portion of the frame 140 that forms the second storage space 102, or in the second storage space 102. This makes it easier to prevent radiated noise from entering the low-voltage connectors 40, 50 in an electrical device 10 having a two-story structure in which the housing 100 has different storage spaces in the thickness direction TD due to the dividing wall 160. It makes it easier to prevent noise from entering the wiring 44, 45, 55 from the low-voltage connectors 40, 50.

The electrical components 3 and 4 are provided on the motor generator 4 and have a physical quantity sensor 6 that measures a physical quantity of the motor generator 4. The low-voltage connectors 40 and 50 are provided on the partition wall 160 and have a second low-voltage connector 50 that is electrically connected to the physical quantity sensor 6. The wiring 43, 44, and 54 have a first sensor wiring 53 that connects the physical quantity sensor 6 and the second low-voltage connector 50 in the first storage space 101, and a second sensor wiring 54 that connects the second low-voltage connector 50 and the control circuit board 18 in the second storage space 102. This prevents radiation noise from entering the second low-voltage connector 50 in the electrical device 10 in which the second low-voltage connector 50 is provided on the partition wall 160. It is easier to prevent noise from entering the wiring 55 from the second low-voltage connector 50.

The high-voltage connector hole 34 is provided on the one side WD- in the width direction from the front side portion 17. The second low-voltage connector 50 is provided on the other side WD+ in the width direction from the front side portion 17. The straight line connecting the end of the high-voltage connector hole 34 on the one side WD- in the width direction and the end of the second low-voltage connector 50 on the one side WD- in the width direction may be referred to as the first straight line L1. The straight line connecting the end of the high-voltage connector hole 34 on the other side WD+ in the width direction and the end of the second low-voltage connector 50 on the other side WD+ in the width direction may be referred to as the second straight line L2. A part of the frame 140 is provided in the intermediate region MA between the first straight line L1 and the second straight line L2. According to this, the radiation noise radiated from the front side portion 17 and the high-voltage connector 30 is shielded by the part of the frame 140. The radiation noise is prevented from entering the second low-voltage connector 50.

The second low-voltage connector 50 does not overlap the control circuit board 18 in the thickness direction TD. The frame 140 has a first wall portion 141 and a third wall portion 143, and a second wall portion 142 and a fourth wall portion 144. The third wall portion 143 has a first continuous wall portion 143A, a second continuous wall portion 143B, and a third continuous wall portion 143C. The third continuous wall portion 143C extends in the depth direction DP along the third edge portion 18C. The first continuous wall portion 143A extends in the depth direction DP farther from the third edge portion 18C than the third continuous wall portion 143C. The second continuous wall portion 143B extends in the width direction WD to connect the third continuous wall portion 143C and the first continuous wall portion 143A.

The second low-voltage connector 50 is provided in the overlapping region between the first projection region in the width direction WD of the first continuous wall portion 143A and the second projection region in the depth direction DP of the second continuous wall portion 143B. A part of the second continuous wall portion 143B and a part of the third continuous wall portion 143C are provided in the intermediate region MA. This makes it possible to physically suppress the propagation of radiated noise while preventing the increase in the size of the housing 100.

The motor generator 4 includes a motor unit 4A and a motor shaft 4B. The motor shaft 4B is the rotating shaft of the motor unit 4A. The motor shaft 4B extends along the depth direction DP. The rotor of the motor unit 4A is fixed to the motor shaft 4B. The motor unit 4A is driven to rotate by power supplied from the inverter 11. The second low-voltage connector 50 does not overlap the motor shaft 4B in the thickness direction TD. This prevents the second low-voltage connector 50 from interfering with, for example, the motor unit 4A or the gear device 5 that is passed through the motor shaft 4B. There is no need to enlarge the housing 100 in the thickness direction TD to avoid interference. In addition, the degree of freedom in design is improved.

Other Embodiments
In the present embodiment, the housing 100 has been described as having the main portion 145 and the protruding portion 146, but the housing 100 does not have to have the protruding portion 146. It is only necessary that the inner surface 140A of the main portion 145 is provided with a wall capable of blocking the radiation noise emitted from the front portion 17 and the high-voltage connector 30.

Although the present disclosure has been described with reference to an embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, while various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more, or less are also within the scope and concept of the present disclosure.

100 housing, 101 first storage space, 102 second storage space, 11 inverter, 14 motor bus bar, 140 frame, 140A inner surface, 142B third extension, 143A second extension, 143C first extension, 160 partition wall, 164 bus bar hole, 17 front side portion, 18 board, 18C edge, 2 battery, 3 electrical component, 30 second connector, 34 connector hole, 4 electrical component, 40 first connector, 44, 45 wiring, 4A drive unit, 4B shaft, 5 motor, 50 first connector, 50 sensor connector, 53 first sensor wiring, 55 wiring, 54 second sensor wiring, 6 physical quantity sensor, DP depth direction, DP- Front side, DP+ Back side, L1 First straight line, L2 Second straight line, MA Middle area, TD Thickness direction, WD Width direction, WD- One side, WD+ Other side.

Claims (6)

A plate-shaped substrate (18);
an inverter (11) overlapping the substrate in a thickness direction (TD) of the substrate and electrically connected to the substrate;
a motor (5) overlapping the inverter in the thickness direction and electrically connected to the inverter;
a motor bus bar (14) electrically connecting the inverter and the motor;
Wiring (44, 45, 55) having a conductor and an electromagnetic shield covering the conductor and electrically connected to the substrate;
a first connector (40, 50) that electrically connects the wiring and an electrical component (3, 4);
a second connector (30) that electrically connects the inverter and the battery (2);
a housing (100) in which the substrate, the inverter, the motor, the motor bus bar, the wiring, the first connector, and the second connector are provided;
A connector hole (34) for passing the second connector through is formed in the housing,
a portion of the motor bus bar is provided outside a projected area of the substrate in the thickness direction;
A portion of the motor bus bar and the connector hole are provided on a front side (DP-) of the substrate in a depth direction (DP) of the substrate,
The electrical device, wherein the first connector is provided on the back side (DP+) of the board in the depth direction. The housing has an annular frame (140) that opens in the thickness direction, and a partition wall (160) that is connected to an inner surface (140A) of the frame and divides a space surrounded by the frame in the thickness direction,
A first storage space (101) is formed by a part of the frame and the partition wall,
A second storage space (102) is formed by the remainder of the frame and the partition wall,
The motor is accommodated in the first accommodation space,
The inverter and the circuit board are accommodated in the second accommodation space,
A bus bar hole (164) for passing the motor bus bar is formed in the partition wall,
the motor bus bar is provided across the first storage space and the second storage space through the bus bar hole,
The electrical device of claim 1, wherein the connector hole, a front portion (17) of the motor bus bar provided on the front side of the projection area, at least a portion of the first connector, and the wiring are further provided in a portion of the frame that forms the second storage space, or in the second storage space. The electrical component includes a physical quantity sensor (6) provided in the motor and configured to measure a physical quantity of the motor;
The first connector has a sensor connector (50) provided on the partition wall and electrically connected to the physical quantity sensor,
3. The electrical device according to claim 2, wherein the wiring includes a first sensor wiring (53) that connects the physical quantity sensor and the sensor connector in the first storage space, and a second sensor wiring (54) that connects the sensor connector and the substrate in the second storage space. the connector hole is provided on one side (WD-) in the width direction (WD) of the board relative to the front side portion,
the sensor connector is provided on the other side (WD+) in the width direction relative to the front side portion,
The electrical device described in claim 3, wherein a portion of the frame is provided in an intermediate region (MA) between a first straight line (L1) connecting the end portion on one side of the width direction of the connector hole and the end portion on one side of the width direction of the sensor connector, and a second straight line (L2) connecting the end portion on the other side of the width direction of the connector hole and the end portion on the other side of the width direction of the sensor connector. the sensor connector does not overlap the board in the depth direction;
the frame has a first extension portion (143C) extending in the depth direction along an edge portion (18C) provided on the other side of the width direction of the substrate, a second extension portion (143A) extending in the depth direction away from the edge portion to the other side of the width direction on the deeper side of the depth direction than the first extension portion, and a third extension portion (143B) extending in the width direction to connect the first extension portion and the second extension portion,
the sensor connector is provided in an overlapping region where a first projection region in the width direction of the second extension portion and a second projection region in the depth direction of the third extension portion overlap with each other;
The electrical device according to claim 4 , wherein a part of the first extension portion and a part of the third extension portion are provided in the intermediate region. The motor has a shaft portion (4B) extending in the depth direction and a drive portion (4A) provided around the shaft portion and driving the shaft portion,
The electrical device according to any one of claims 3 to 5, wherein the sensor connector and the shaft portion do not overlap in the thickness direction.

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