JPS58108781U - power supply - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来例の構成を示す説明図、第２図は第１′図
の要部の動作波形図、第３図は本考案の構成を示す説明
図、第４図は第３図の要部の動作説明図であり、図中、
１は直流電源、２はトランス、Ｎ１は１次側巻線、Ｎ２
は２次側巻線、Ｎ３は補助巻線、３は主スィッチ（Ｓｌ
）、６は発振回路、８は整　″流用ダイオード、９はイ
ンダクタンス、１０はキャパシタンス、１１は検出増幅
回路、２１は主スィッチ（Ｎ２）、２２は制御回路、２
３は同期検出回路、２４は電流トランスを示す。 （ａ）過電流検出信号Fig. 1 is an explanatory diagram showing the configuration of a conventional example, Fig. 2 is an operational waveform diagram of the main part of Fig. 1', Fig. 3 is an explanatory diagram showing the configuration of the present invention, and Fig. 4 is an explanatory diagram of the main part of Fig. 3. It is an explanatory diagram of the operation of the main parts, and in the diagram,
1 is the DC power supply, 2 is the transformer, N1 is the primary winding, N2
is the secondary winding, N3 is the auxiliary winding, and 3 is the main switch (Sl
), 6 is an oscillation circuit, 8 is a rectifier diode, 9 is an inductance, 10 is a capacitance, 11 is a detection amplifier circuit, 21 is a main switch (N2), 22 is a control circuit, 2
3 indicates a synchronization detection circuit, and 24 indicates a current transformer. (a) Overcurrent detection signal

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＦＭ、”ＩＮ電圧を第１のスイッチ素子により断続して
トランスの１次側巻線に印加し、該トランスの２次側巻
線に誘起する電圧を整流して直流出力電圧とするＤＣ−
ＤＣコンバータより成る電源装置において、前記トラン
スの２次側巻線に整流用の断続−制御可能な第２のスイ
ッチ素子を接続し、前記トランスに補助巻線を設置、１
、該補助巻線に接続され゛前記第１のスイッチ素子に流
れる電流の立上りを検出する同期検出回路と、該同期検
出回路の検出信号により、前記第１のスイッチ素子の導
通開始に同期し、且つ該第１のスイッチ素子の最大導通
時間より前記第２のスイッチ素子の最大導通時間が短く
なるように該第２のスイッチ素子の断続動−作番制御す
る制御回路とを設けたことを特徴とする電源装置。　　
　゛FM, "DC-" in which the IN voltage is applied intermittently to the primary winding of the transformer by a first switching element, and the voltage induced in the secondary winding of the transformer is rectified to become a DC output voltage.
In a power supply device consisting of a DC converter, a second switch element capable of intermittent and controllable rectification is connected to the secondary winding of the transformer, and an auxiliary winding is installed in the transformer, 1
, a synchronization detection circuit connected to the auxiliary winding and detecting the rise of the current flowing through the first switch element, and synchronized with the start of conduction of the first switch element by a detection signal of the synchronization detection circuit, and a control circuit that controls the intermittent operation and operation number of the second switch element so that the maximum conduction time of the second switch element is shorter than the maximum conduction time of the first switch element. power supply.
゛