JPS5815491U

JPS5815491U - power conversion circuit

Info

Publication number: JPS5815491U
Application number: JP10537081U
Authority: JP
Inventors: 広瀬　勝久
Original assignee: 沖電気工業株式会社
Priority date: 1981-07-17
Filing date: 1981-07-17
Publication date: 1983-01-31

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

[Brief explanation of drawings]

第１図は従来の他励発振によるリンギングチョークコン
バータ電源の構成と電力変換回路を示す回路図、第２図
、第３図は従来の電力変換回路の実施例、第４図ａ及び
ｂ１１ｂ図ａ及びｂ、第６図ａ及すは、第１図、第２図
、第３図の電力変換回路における主スイツチングトラン
ジスタの動作波形、及び負荷曲線の特性図、第７図は本
考案の電力変換回路と周辺部の実施例を示す回路図、第
８図ａ、　ｂ、　　ｃ、　　ｄ、　　ｅは第７図の動作
タイムチャート図、第９図ａ、　　ｂは、本考案の電力
変換回路のターンオン、ターンオフ時の等価回路図、第
１０図は、本考案の電力変換回路のスイッチ損を示す負
荷曲線特性図である。ｌａ、　　ｌｂ・・・・・・入力端子、２・・・・・・
フィルタ、３・・・・・・過電流保護回路、４・・・・
・・発振回路、５・・・・・・パルス変調回路、６・・
・・・・ドライブ回路、７・・・・・・電力変換回路、
７ａ・・・・・・リンギングチョークコンバータ用トラ
ンス、７ｂ・・・・・・主スイツチングトランジスタ、
７Ｃ・・・・・・整流ダイオード、７ｄ・・・・・・整
流コンデンサ、７ｇ・・・・・・トランス、７ｅ・・・
・・・コンデンサ、７ｈ・・・・・・ダイオード、７１
・・・・・・トランジスタ、１０・五・・第１波形整型
回路、１１・・・・・・第２波形整型回路、８・・・・
・・誤差増幅回路、９ａ、　　９ｂ・・・・・・出力端
子。Figure 1 is a circuit diagram showing the configuration and power conversion circuit of a conventional ringing choke converter power supply using separately excited oscillation, Figures 2 and 3 are examples of conventional power conversion circuits, Figures 4a and b11b, Figure a and b, Fig. 6a and the characteristic diagram of the operating waveform and load curve of the main switching transistor in the power conversion circuits of Figs. 1, 2, and 3; 8a, b, c, d, and e are operation time charts of FIG. 7, and FIGS. 9a and b are circuit diagrams showing an example of the conversion circuit and peripheral parts. FIG. 10, an equivalent circuit diagram at turn-on and turn-off, is a load curve characteristic diagram showing switch loss of the power conversion circuit of the present invention. la, lb...input terminal, 2...
Filter, 3... Overcurrent protection circuit, 4...
...Oscillation circuit, 5...Pulse modulation circuit, 6...
... Drive circuit, 7... Power conversion circuit,
7a...Transformer for ringing choke converter, 7b...Main switching transistor,
7C... Rectifier diode, 7d... Rectifier capacitor, 7g... Transformer, 7e...
...Capacitor, 7h...Diode, 71
...... Transistor, 10.5... First waveform shaping circuit, 11... Second waveform shaping circuit, 8...
...Error amplification circuit, 9a, 9b...Output terminal.

Claims

[Scope of utility model registration request]

Ringing choke converter transformer 7a and part 1
Main switching transistor 7b inserted into the next current path
In the power conversion circuit, a transformer 7g is provided, a series circuit of the primary coil of the transformer 7g and a capacitor 7e is connected between the collector and emitter of the main switching transistor 7b, and a secondary coil of the transformer 7g is connected between the collector and the emitter of the main switching transistor 7b. A series circuit consisting of a diode 7h connected in a direction to block the reverse activation force of the transformer 7g and a collector-emitter circuit of a transistor 71 is connected between both ends of the transistor 71, and the base of the transistor 71 is connected to the main switching transistor 7b. A pulse voltage is applied throughout the transistor 71 almost during switching, so that the transistor 71 becomes conductive.
The on/off operations of the transformer 7g change the primary side reactance of the transformer 7g, thereby delaying the rise of the back electromotive voltage and reducing the discharge current in order to reduce the turn-off loss and the second turn-off loss of the main switching transistor 7b. A power conversion circuit characterized by suppressing.