JPH0249331U - - Google Patents
Info
- Publication number
- JPH0249331U JPH0249331U JP12631688U JP12631688U JPH0249331U JP H0249331 U JPH0249331 U JP H0249331U JP 12631688 U JP12631688 U JP 12631688U JP 12631688 U JP12631688 U JP 12631688U JP H0249331 U JPH0249331 U JP H0249331U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- voltage
- relay
- switching
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来のスイツチング電源回路の一例を示す回
路図、第３図は第２図の回路における出力電圧と
出力電流の関係を示す電圧・電流特性図である。
１……交流電源、２……整流器、３……電源リ
レー、６……主電源回路、７，３７……コンバー
タトランス、８，３８……スイツチングトランジ
スタ、９……電圧検出用抵抗、１０，３１……ト
ランジスタ、１３……ヒユーズ、２４……ＲＣ積
分回路、２５……ツエナーダイオード、２７……
サイリスタ、３３……待機用電源回路、４４……
リレードライブトランジスタ、４５……リモコン
受光部。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing an example of a conventional switching power supply circuit, and FIG. 3 is a voltage-current characteristic diagram showing the relationship between output voltage and output current in the circuit of FIG. 2. 1... AC power supply, 2... Rectifier, 3... Power supply relay, 6... Main power circuit, 7, 37... Converter transformer, 8, 38... Switching transistor, 9... Voltage detection resistor, 10 , 31... Transistor, 13... Fuse, 24... RC integration circuit, 25... Zener diode, 27...
Thyristor, 33... Standby power supply circuit, 44...
Relay drive transistor, 45...Remote control light receiving section.
Claims (1)
整流回路および前記交流電源を結ぶ電路にリレー
接点が介挿された電源リレーと、前記整流回路の
整流出力電圧をスイツチングトランジスタのスイ
ツチングレギユレータ動作により所定電圧に変換
するとともに、該スイツチングトランジスタに直
列接続された検出用抵抗の両端電圧が所定電圧以
上のとき前記スイツチングトランジスタのベース
電流を減少させる過電流リミツタを有した主電源
回路と、外部からオン指令信号入力時に前記電源
リレーのコイルに駆動電力を供給するリレー駆動
回路とを備えて成るスイツチング電源回路におい
て、 前記主電源回路の検出用抵抗の両端に接続され
た積分回路と、 前記積分回路の出力電圧が所定電圧以上のとき
前記リレー駆動回路の動作を停止せしめる保護回
路とを設けたことを特徴とするスイツチングレギ
ユレータの過電流保護回路。[Claims for Utility Model Registration] A rectifier circuit that rectifies the alternating current voltage of an alternating current power supply, a power supply relay in which a relay contact is inserted in an electric line connecting the rectifier circuit and the alternating current power supply, and a rectified output voltage of the rectifier circuit. The switching transistor converts the voltage into a predetermined voltage by the switching regulator operation, and also reduces the base current of the switching transistor when the voltage across the detection resistor connected in series with the switching transistor exceeds a predetermined voltage. A switching power supply circuit comprising a main power supply circuit having a current limiter and a relay drive circuit that supplies drive power to the coil of the power supply relay when an ON command signal is input from the outside, wherein a detection resistor of the main power supply circuit is provided. Overcurrent protection for a switching regulator, comprising: an integrating circuit connected to both ends; and a protection circuit that stops the operation of the relay drive circuit when the output voltage of the integrating circuit is equal to or higher than a predetermined voltage. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631688U JPH0249331U (en) | 1988-09-29 | 1988-09-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631688U JPH0249331U (en) | 1988-09-29 | 1988-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249331U true JPH0249331U (en) | 1990-04-05 |
Family
ID=31377734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12631688U Pending JPH0249331U (en) | 1988-09-29 | 1988-09-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007215347A (en) * | 2006-02-10 | 2007-08-23 | Nsk Ltd | Load protector |
-
1988
- 1988-09-29 JP JP12631688U patent/JPH0249331U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007215347A (en) * | 2006-02-10 | 2007-08-23 | Nsk Ltd | Load protector |
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