JPH03124216U - - Google Patents

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Publication number
JPH03124216U
JPH03124216U JP3298790U JP3298790U JPH03124216U JP H03124216 U JPH03124216 U JP H03124216U JP 3298790 U JP3298790 U JP 3298790U JP 3298790 U JP3298790 U JP 3298790U JP H03124216 U JPH03124216 U JP H03124216U
Authority
JP
Japan
Prior art keywords
current
voltage
dummy
circuit
load
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
JP3298790U
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 JP3298790U priority Critical patent/JPH03124216U/ja
Publication of JPH03124216U publication Critical patent/JPH03124216U/ja
Pending legal-status Critical Current

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  • Control Of Voltage And Current In General (AREA)
  • Control Of Electrical Variables (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構成ブロツク
図、第2図は整流平滑化回路35の出力電圧o
utと負荷電流Ioutの説明図、第3図は第1
図の回路の出力電圧Voutと負荷電流Iout
の関係図、第4図は本考案の他の実施例を示す回
路図である。第5図は従来装置の要部回路図、第
6図は出力電圧Voutと負荷電流Ioutの関
係図である。 L&……可飽和リアクトル、20……マグアン
プ駆動回路、30……ダミー回路、40……ダミ
ー制御回路。
FIG. 1 is a configuration block diagram showing an embodiment of the present invention, and FIG. 2 shows the output voltage o of the rectifying and smoothing circuit 35.
An explanatory diagram of ut and load current Iout, Fig. 3 is the first
Output voltage Vout and load current Iout of the circuit shown in the figure
FIG. 4 is a circuit diagram showing another embodiment of the present invention. FIG. 5 is a circuit diagram of a main part of the conventional device, and FIG. 6 is a diagram showing the relationship between output voltage Vout and load current Iout. L&... saturable reactor, 20... mag amplifier drive circuit, 30... dummy circuit, 40... dummy control circuit.

Claims (1)

【実用新案登録請求の範囲】 一次巻線n1に印加される直流電圧をスイツチ
ング素子Qによつてオンオフし、二次巻線に誘起
されるスイツチング電圧をチヨークコイルL3を
有する整流平滑化回路により整流平滑化して所定
電圧の直流電圧をえるスイツチング電源において
、 前記二次巻線と整流平滑化回路の間に挿入され
た可飽和リアクトルL6と、 この二次巻線と可飽和リアクトルの間に設けら
れ負荷電流を検出するカレントトランスCTと、 この出力電圧が所定の基準電圧に一致する方向
に当該可飽和リアクトルの駆動信号を送るマグア
ンプ駆動回路20と、 前記整流平滑化回路の出力に接続されダミー電
流を消費するダミー回路30と、 このカレントトランスで求めた負荷電流と、前
記チヨークコイルの臨界電流に相当する値とを比
較し、軽負荷状態であれば当該ダミー回路にこの
臨界電流に相当するダミー電流を消費させ、軽負
荷状態に無ければダミー電流を抑止する制御信号
を出力するダミー制御回路40と、 を具備することを特徴とする多出力スイツチング
電源のダミー回路。
[Claims for Utility Model Registration] The DC voltage applied to the primary winding n1 is turned on and off by the switching element Q, and the switching voltage induced in the secondary winding is rectified and smoothed by a rectifying and smoothing circuit having a chiyoke coil L3. In a switching power supply that obtains a DC voltage of a predetermined voltage by converting the voltage into a saturable reactor L6 inserted between the secondary winding and the rectifying and smoothing circuit, and a load provided between the secondary winding and the saturable reactor, A current transformer CT that detects current; a mag-amp drive circuit 20 that sends a drive signal for the saturable reactor in a direction in which the output voltage matches a predetermined reference voltage; The dummy circuit 30 to be consumed compares the load current obtained by this current transformer with a value corresponding to the critical current of the chiyoke coil, and if the load is light, a dummy current corresponding to this critical current is applied to the dummy circuit. A dummy circuit for a multi-output switching power supply, comprising: a dummy control circuit 40 that outputs a control signal that causes consumption and suppresses dummy current if it is not in a light load state;
JP3298790U 1990-03-29 1990-03-29 Pending JPH03124216U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3298790U JPH03124216U (en) 1990-03-29 1990-03-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3298790U JPH03124216U (en) 1990-03-29 1990-03-29

Publications (1)

Publication Number Publication Date
JPH03124216U true JPH03124216U (en) 1991-12-17

Family

ID=31536301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3298790U Pending JPH03124216U (en) 1990-03-29 1990-03-29

Country Status (1)

Country Link
JP (1) JPH03124216U (en)

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