JPS61177165A - Power source circuit - Google Patents

Power source circuit

Info

Publication number
JPS61177165A
JPS61177165A JP60017280A JP1728085A JPS61177165A JP S61177165 A JPS61177165 A JP S61177165A JP 60017280 A JP60017280 A JP 60017280A JP 1728085 A JP1728085 A JP 1728085A JP S61177165 A JPS61177165 A JP S61177165A
Authority
JP
Japan
Prior art keywords
capacitor
winding
transistor
diode
voltage
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.)
Granted
Application number
JP60017280A
Other languages
Japanese (ja)
Other versions
JPH0247198B2 (en
Inventor
Shigenori Uesugi
茂紀 上杉
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.)
Usac Electronic Ind Co Ltd
Original Assignee
Usac Electronic Ind Co Ltd
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 Usac Electronic Ind Co Ltd filed Critical Usac Electronic Ind Co Ltd
Priority to JP60017280A priority Critical patent/JPS61177165A/en
Publication of JPS61177165A publication Critical patent/JPS61177165A/en
Publication of JPH0247198B2 publication Critical patent/JPH0247198B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To simplify a circuit by connecting a diode pump made of a capacitor and a diode with a feedback winding to supply power to a controller, and turning ON or OFF the controller by the output of a reference voltage generator. CONSTITUTION:When a transistor (TR)5 is turned ON, a voltage shown by an equation I (where N1, N3 are numbers of turns of windings 1, 3) is generated to charge a capacitor 15. When TR5 is turned OFF, a voltage shown by an equation II (where N2 is the number of turns of a winding 2) is generated at the winding 3 to charge a capacitor 16. When the TR5 is again turned ON, the voltage of the capacitor 15 becomes an equation III (where C15, C16 are capacities of the capacitors 15, 16) to become the power of a controller 12. When the output voltage Vout becomes larger than a reference voltage 29, a photodiode 31 emits a light by the output of an operational amplifier 30, phototransistors 23, TR22, 21 are turned ON, and the controller 12 reduces the output of the TR5. Thus, an auxiliary winding can be eliminated to simplify the circuit.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、リンギング・チョーク・コンバータ（ＲＣＣ
）方式の電源回路の改良に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a ringing choke converter (RCC).
) type power supply circuit.

〔従来技術と問題点〕[Prior art and problems]

第２図は従来のＲＣＣ方式の電源回路の概要を示す図で
ある。第２図において、Ｔは変圧器、１は変圧器Ｔの１
次巻線、２は２次巻線、３はフィードバック巻線、４は
補助巻線、５はトランジスタ、６と７は抵抗、８と９は
コンデンサ、１０と１１はダイオード、１２は制御回路
、１３は電圧検出回路をそれぞれ示している。第２図の
電源回路は下記のようにして動作する。トランジスタ５
がオンすると、巻線１，３．４に電流が流れ、巻線３の
誘起電圧によってトランジスタ５のベースに電流が供給
される。ベースに電流が供給されると、トランジスタ５
は益々電流を流し、トランジスタ５は飽和する。トラン
ジスタ５の電流がフィードバックにより制御される値に
達すると、トランジスタ５はオフし、変圧器Ｔに蓄積さ
れた磁気エネルギーは２次巻線２から放出される。電圧
検出回路１３は、出力電圧が規定値より大きいか否かを
検出するものであり、制御回路１２はその検出結果に従
ってトランジスタ５のベース電流を制御するものである
。電圧検出回路１３と制御回路１２はホト・カプラで結
合されている。補助巻線４は制御回路１２に電力を供給
するためのものである。FIG. 2 is a diagram showing an outline of a conventional RCC type power supply circuit. In Figure 2, T is a transformer, 1 is 1 of the transformer T
Next winding, 2 is a secondary winding, 3 is a feedback winding, 4 is an auxiliary winding, 5 is a transistor, 6 and 7 are resistors, 8 and 9 are capacitors, 10 and 11 are diodes, 12 is a control circuit, Reference numeral 13 indicates a voltage detection circuit. The power supply circuit of FIG. 2 operates as follows. transistor 5
When turned on, current flows through the windings 1, 3.4, and the induced voltage in the winding 3 supplies current to the base of the transistor 5. When current is supplied to the base, transistor 5
conducts more and more current, and transistor 5 saturates. When the current in transistor 5 reaches a value controlled by the feedback, transistor 5 is turned off and the magnetic energy stored in transformer T is released from secondary winding 2. The voltage detection circuit 13 detects whether the output voltage is greater than a specified value, and the control circuit 12 controls the base current of the transistor 5 according to the detection result. Voltage detection circuit 13 and control circuit 12 are coupled by a photocoupler. The auxiliary winding 4 is for supplying power to the control circuit 12.

第２図の電源回路は、補助巻線を有しているので、比較
的に製造コストが高くなるという欠点を有している。The power supply circuit of FIG. 2 has the disadvantage that the manufacturing cost is relatively high because it has an auxiliary winding.

〔発明の目的〕[Purpose of the invention]

本発明は、上記の考察に基づくものであって、制御回路
に電力を供給するための補助巻線を除去し、且つ低電圧
入力時又は負荷短絡時の何れの場合でも制御回路が確実
に動作出来るようにしたＲＣＣ方式の電源回路を提供す
ることを目的としている。The present invention is based on the above considerations, and eliminates the auxiliary winding for supplying power to the control circuit, and ensures that the control circuit operates reliably even when low voltage is input or when the load is short-circuited. The purpose of the present invention is to provide an RCC type power supply circuit that enables the following.

〔目的を達成するための手段〕[Means to achieve the purpose]

そしてそのため本発明の電源回路は、１次巻線と２次巻
線とフィードバック巻線を有する変圧器と、コレクタが
上記１次巻線の下端に接続されエミッタが上記フィード
バック巻線の上端に接続されたトランジスタと、上記ト
ランジスタのベース電流を制御する制御回路とを具備し
、且つ上記フィードバック巻線に誘起した電圧によって
上記トランジスタにベース電流を供給するように構成さ
れたリンギング・チョーク・コンバータ方式の電源回路
において、上記制御回路の電源端子と上記トランジスタ
のエミッタ間に第１のコンデンサを配置し、上記フィー
ドバック巻線の下端に第１のダイオードのアノードを接
続すると共に上記電源端子に上記第１のダイオードのカ
ソードを接続し、上記フィードバック巻線の下端に第２
のコンデンサの一端を接続し、該第２のコンデンサの他
端に第２のダイオードのカソードを接続すると共に該第
２のダイオードのアノードを上記フィードバック巻線の
上端に接続し、第３のダイオードのアノードを上記電源
端子に接続すると共に該第３のダイオードのカソードを
上記第２のコンデンサの他端に接続したことを特徴とす
るものである。Therefore, the power supply circuit of the present invention includes a transformer having a primary winding, a secondary winding, and a feedback winding, a collector connected to the lower end of the primary winding, and an emitter connected to the upper end of the feedback winding. a ringing choke converter, the ringing choke converter comprising: a transistor having a radial conductivity, a control circuit for controlling a base current of the transistor, and a voltage induced in the feedback winding to supply the base current to the transistor; In the power supply circuit, a first capacitor is disposed between the power supply terminal of the control circuit and the emitter of the transistor, the anode of the first diode is connected to the lower end of the feedback winding, and the first capacitor is connected to the power supply terminal. Connect the cathode of the diode and connect the second
The cathode of a second diode is connected to the other end of the second capacitor, and the anode of the second diode is connected to the upper end of the feedback winding. The third diode is characterized in that its anode is connected to the power supply terminal and the cathode of the third diode is connected to the other end of the second capacitor.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明を図面を参照しつつ説明する。 Hereinafter, the present invention will be explained with reference to the drawings.

第１図は本発明の１実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.

第１図において、１５と１６はコンデンサ、１フないし
１９はダイオード、２０は抵抗、２１と２２はトランジ
スタ、２３はホト・トランジスタ、２４と２５は抵抗、
２６はコンデンサ、２７と２８は抵抗、２９は基準電源
、３０は演算増幅器、３１はホト・ダイオードをそれぞ
れ示している。In FIG. 1, 15 and 16 are capacitors, 1 through 19 are diodes, 20 is a resistor, 21 and 22 are transistors, 23 is a phototransistor, 24 and 25 are resistors,
26 is a capacitor, 27 and 28 are resistors, 29 is a reference power supply, 30 is an operational amplifier, and 31 is a photodiode.

コンデンサ１５と１６、ダイオード１６ないしｌ　　、
８の部分はダイオード・ポンプを構成しており、トラン
ジスタ２１と２２、ホト・トランジスタ２３、抵抗２４
と２５、コンデンサ２６の部分は制御回路１２を構成し
ている。また、抵抗２７と２８、基準電源２９、演算増
幅器３０、ホト・ダイオード３１の部分は電圧検出回路
１３を構成している。Capacitors 15 and 16, diodes 16 to l,
The part 8 constitutes a diode pump, which includes transistors 21 and 22, a phototransistor 23, and a resistor 24.
25 and the capacitor 26 constitute the control circuit 12. Further, the resistors 27 and 28, the reference power supply 29, the operational amplifier 30, and the photodiode 31 constitute the voltage detection circuit 13.

次に第１図の電源回路の動作について説明する。Next, the operation of the power supply circuit shown in FIG. 1 will be explained.

トランジスタ５がオンの時、フィードバック巻線３には
、 なる電圧が誘起する。但し、Ｎ１は巻線１の巻線数、Ｎ
３は捲線３の巻線数、Ｖｉｎは入力電圧をそれぞれ示す
。巻線３にＶ、なる電圧が誘起されると、コンデンサ１
６の電荷が零の場合には、ダイオード１８を介してコン
デンサ１５は■１まで充電される。次にトランジスタ５
がオフになった時、ダイオード１９の順方向電圧降下を
省略すると、巻線３には、 ＮＺ なる電圧が誘起し、コンデンサ１６はＶ２まで充電され
る。但し、Ｎ２は巻線２の巻線数である。When the transistor 5 is on, a voltage is induced in the feedback winding 3. However, N1 is the number of turns of winding 1, N
3 indicates the number of turns of the winding 3, and Vin indicates the input voltage. When a voltage of V is induced in the winding 3, the capacitor 1
When the charge of 6 is zero, the capacitor 15 is charged to 1 through the diode 18. Next, transistor 5
When is turned off, if the forward voltage drop of the diode 19 is omitted, a voltage of NZ is induced in the winding 3, and the capacitor 16 is charged to V2. However, N2 is the number of turns of the winding 2.

次にトランジスタ５がオンすると、コンデンサ１５の両
端の電圧は、 Ｃｌ５ｆＣ１６ なる電圧まで上昇する。但し、Ｃｌ５はコンデンサ１５
の容量、Ｃｌ６はコンデンサ１６の容量をそれぞれ表す
。出力が短絡状態の時は■２＝０となるから、制御回路
１２の最低動作電圧よりＶ、が大きければ、制御回路１
２は安定に動作することが出来る。また、出力開放状態
でＶ　ｉｎが非常に小さいレベルまで降下した場合、ｖ
、＝Ｏとなるが、制御回路１２の最低動作電圧よりｖ２
が大きければ、出力が過電圧状態になることなく、安定
に制御できることが判る。Next, when transistor 5 is turned on, the voltage across capacitor 15 rises to a voltage of Cl5fC16. However, Cl5 is capacitor 15
and Cl6 represent the capacitance of the capacitor 16, respectively. When the output is short-circuited, ■2=0, so if V is larger than the minimum operating voltage of the control circuit 12, the control circuit 1
2 can operate stably. Also, if V in drops to a very small level with the output open, v
, =O, but from the lowest operating voltage of the control circuit 12 v2
It can be seen that if is large, the output can be stably controlled without going into an overvoltage state.

出力電圧が基準電圧より大きい場合、演算増幅器３０は
負の出力を生じ、ホト・ダイオード３１が発光する。ホ
ト・ダイオード３１からの光はホト・トランジスタ２３
により受光され、トランジスタ２２を導通状態にする。If the output voltage is greater than the reference voltage, operational amplifier 30 produces a negative output and photodiode 31 emits light. The light from the photodiode 31 is transferred to the phototransistor 23
The light is received by the transistor 22, and the transistor 22 becomes conductive.

トランジスタ２２が導通状態になると、トランジスタ２
１も導通状態になり、この結果、制御回路１２はトラン
ジスタ５のベース電流が減少し、出力電圧を低下させる
ように制御する。When transistor 22 becomes conductive, transistor 2
1 also becomes conductive, and as a result, the control circuit 12 controls the base current of the transistor 5 to decrease, thereby lowering the output voltage.

〔発明の効果〕〔Effect of the invention〕

以上の説明から明らかなように、本発明によれば、補助
巻線を設けることな（、ＲＣＣ方式の電源回路の制御回
路に電力を安定に供給できるという顕著な効果を奏する
ことが出来る。As is clear from the above description, according to the present invention, it is possible to achieve the remarkable effect that power can be stably supplied to the control circuit of the RCC type power supply circuit without providing an auxiliary winding.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の１実施例のブロック図、第２図は従来
のＲＣＣ方式の電源回路の１例を示す図である。 Ｔ・・・変圧器、１・・・変圧器Ｔの１次巻線、２・・
・２次巻線、３・・・フィードバック巻線、４・・・補
助巻線、５・・・トランジスタ、６と７・・・抵抗、８
と９・・・コンデンサ、１０と１１・・・ダイオード、
１２・・・制御回路、１３・・・電圧検出回路、１５と
１６・・・コンデンサ、１７ないし１９・・・ダイオー
ド、２０・・・抵抗、２１と２２・・・トランジスタ、
２３・・・ホト・トランジスタ、２４と２５・・・抵抗
、２６・・・コンデンサ、２７と２８・・・抵抗、２９
・・・基準電源、３０・・・演算増幅器、３１・・・ホ
ト・ダイオード。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a conventional RCC type power supply circuit. T...Transformer, 1...Primary winding of transformer T, 2...
・Secondary winding, 3... Feedback winding, 4... Auxiliary winding, 5... Transistor, 6 and 7... Resistor, 8
and 9...capacitor, 10 and 11...diode,
12... Control circuit, 13... Voltage detection circuit, 15 and 16... Capacitor, 17 to 19... Diode, 20... Resistor, 21 and 22... Transistor,
23...Phototransistor, 24 and 25...Resistor, 26...Capacitor, 27 and 28...Resistor, 29
... Reference power supply, 30 ... Operational amplifier, 31 ... Photo diode.

Claims (1)

【特許請求の範囲】[Claims] １次巻線と２次巻線とフィードバック巻線を有する変圧
器と、コレクタが上記１次巻線の下端に接続されエミッ
タが上記フィードバック巻線の上端に接続されたトラン
ジスタと、上記トランジスタのベース電流を制御する制
御回路とを具備し、且つ上記フィードバック巻線に誘起
した電圧によって上記トランジスタにベース電流を供給
するように構成されたリンギング・チョーク・コンバー
タ方式の電源回路において、上記制御回路の電源端子と
上記トランジスタのエミッタ間に第１のコンデンサを配
置し、上記フィードバック巻線の下端に第１のダイオー
ドのアノードを接続すると共に上記電源端子に上記第１
のダイオードのカソードを接続し、上記フィードバック
巻線の下端に第２のコンデンサの一端を接続し、該第２
のコンデンサの他端に第２のダイオードのカソードを接
続すると共に該第２のダイオードのアノードを上記フィ
ードバック巻線の上端に接続し、第３のダイオードのア
ノードを上記電源端子に接続すると共に該第３のダイオ
ードのカソードを上記第２のコンデンサの他端に接続し
たことを特徴とする電源回路。A transformer having a primary winding, a secondary winding, and a feedback winding; a transistor having a collector connected to a lower end of the primary winding and an emitter connected to an upper end of the feedback winding; and a base of the transistor. A ringing choke converter type power supply circuit comprising a control circuit for controlling a current and configured to supply a base current to the transistor by a voltage induced in the feedback winding, the power supply circuit for the control circuit A first capacitor is disposed between the terminal and the emitter of the transistor, an anode of a first diode is connected to the lower end of the feedback winding, and the first capacitor is connected to the power supply terminal.
The cathode of the diode is connected, one end of the second capacitor is connected to the lower end of the feedback winding, and the second
The cathode of a second diode is connected to the other end of the capacitor, and the anode of the second diode is connected to the upper end of the feedback winding, and the anode of a third diode is connected to the power supply terminal. A power supply circuit characterized in that the cathode of the diode No. 3 is connected to the other end of the second capacitor.
JP60017280A 1985-01-31 1985-01-31 Power source circuit Granted JPS61177165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60017280A JPS61177165A (en) 1985-01-31 1985-01-31 Power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60017280A JPS61177165A (en) 1985-01-31 1985-01-31 Power source circuit

Publications (2)

Publication Number Publication Date
JPS61177165A true JPS61177165A (en) 1986-08-08
JPH0247198B2 JPH0247198B2 (en) 1990-10-18

Family

ID=11939564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60017280A Granted JPS61177165A (en) 1985-01-31 1985-01-31 Power source circuit

Country Status (1)

Country Link
JP (1) JPS61177165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1630938A3 (en) * 1996-05-15 2009-07-22 Deutsche Thomson-Brandt Gmbh Switched mode power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1630938A3 (en) * 1996-05-15 2009-07-22 Deutsche Thomson-Brandt Gmbh Switched mode power supply

Also Published As

Publication number Publication date
JPH0247198B2 (en) 1990-10-18

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