JPH02103787U - - Google Patents
Info
- Publication number
- JPH02103787U JPH02103787U JP863089U JP863089U JPH02103787U JP H02103787 U JPH02103787 U JP H02103787U JP 863089 U JP863089 U JP 863089U JP 863089 U JP863089 U JP 863089U JP H02103787 U JPH02103787 U JP H02103787U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- emitter
- base
- saturable reactor
- circuit
- 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
Links
- 238000009499 grossing Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案に係る磁気制御型スイツチング
レギユレータの過電流保護回路の第１実施例を示
す回路図、第２図は本考案の第２実施例を示す回
路図、第３図は本考案の第３実施例を示す回路図
、第４図は本考案の第４実施例を示す回路図であ
る。
１……制御部、ＭＡ……可飽和リアクトル、Ｃ
Ｔ１，ＣＴ２……変流器、Ｑ１乃至Ｑ４……トラ
ンジスタ、Ｒ１乃至Ｒ６……抵抗、Ｄ１乃至Ｄ５
……ダイオード、Ｃ１……コンデンサ、ＣＨ……
チヨークコイル、ＰＴ……メイントランス。
FIG. 1 is a circuit diagram showing a first embodiment of an overcurrent protection circuit for a magnetically controlled switching regulator according to the present invention, FIG. 2 is a circuit diagram showing a second embodiment of the present invention, and FIG. 4 is a circuit diagram showing a third embodiment of the present invention, and FIG. 4 is a circuit diagram showing a fourth embodiment of the present invention. 1...Control unit, MA...Saturable reactor, C
T1, CT2... Current transformer, Q1 to Q4... Transistor, R1 to R6... Resistor, D1 to D5
...Diode, C1...Capacitor, CH...
Chiyoke coil, PT...main transformer.
Claims (1)
２次側に、可飽和リアクトルを介して整流平滑回
路を接続した磁気制御型スイツチングレギユレー
タにおいて、前記可飽和リアクトル又は前記整流
平滑回路のフライホイールダイオードに直列に変
流器の１次側を挿入し、該変流器の２次側の誘起
電圧を整流した電圧を、第１のトランジスタのベ
ース、エミツタ間に印加し、該第１のトランジス
タのベース、エミツタ間電圧を所定の値に調整す
るために該ベース、エミツタ間に抵抗を介して第
２のトランジスタを接続し、該第２のトランジス
タのベース、エミツタを所定の抵抗回路を介して
前記整流平滑回路出力両端に接続し、前記整流平
滑回路の出力側と前記可飽和リアクトルの出力側
端部との間に前記第１のトランジスタ及びリセツ
ト用ダイオードの直列回路を接続し、前記変流器
による過電流検出時に前記第１のトランジスタを
導通状態として前記可飽和リアクトルにリセツト
電流を流すことを特徴とする磁気制御型スイツチ
ングレギユレータの過電流保護回路。 In a magnetically controlled switching regulator in which a rectifying and smoothing circuit is connected to the secondary side of a main transformer that receives a square wave input on the primary side via a saturable reactor, the fly-over of the saturable reactor or the rectifying and smoothing circuit is The primary side of a current transformer is inserted in series with the wheel diode, and a voltage obtained by rectifying the induced voltage on the secondary side of the current transformer is applied between the base and emitter of the first transistor. In order to adjust the voltage between the base and emitter of the transistor to a predetermined value, a second transistor is connected between the base and the emitter via a resistor, and the base and emitter of the second transistor are connected via a predetermined resistor circuit. A series circuit of the first transistor and a reset diode is connected between the output side of the rectifier and smoothing circuit and the output side end of the saturable reactor. An overcurrent protection circuit for a magnetically controlled switching regulator, characterized in that when an overcurrent is detected by a current regulator, the first transistor is rendered conductive and a reset current is caused to flow through the saturable reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP863089U JPH076711Y2 (en) | 1989-01-27 | 1989-01-27 | Overcurrent protection circuit for magnetically controlled switching regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP863089U JPH076711Y2 (en) | 1989-01-27 | 1989-01-27 | Overcurrent protection circuit for magnetically controlled switching regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02103787U true JPH02103787U (en) | 1990-08-17 |
| JPH076711Y2 JPH076711Y2 (en) | 1995-02-15 |
Family
ID=31214680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP863089U Expired - Lifetime JPH076711Y2 (en) | 1989-01-27 | 1989-01-27 | Overcurrent protection circuit for magnetically controlled switching regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH076711Y2 (en) |
-
1989
- 1989-01-27 JP JP863089U patent/JPH076711Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH076711Y2 (en) | 1995-02-15 |
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