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
Application number
JP12631688U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP12631688U priority Critical patent/JPH0249331U/ja
Publication of JPH0249331U publication Critical patent/JPH0249331U/ja
Pending legal-status Critical Current

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  • Protection Of Static Devices (AREA)
  • Dc-Dc Converters (AREA)

Description

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

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)

【実用新案登録請求の範囲】 交流電源の交流電圧を整流する整流回路と、該
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.
JP12631688U 1988-09-29 1988-09-29 Pending JPH0249331U (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007215347A (en) * 2006-02-10 2007-08-23 Nsk Ltd Load protector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007215347A (en) * 2006-02-10 2007-08-23 Nsk Ltd Load protector

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