JPH0458091U

JPH0458091U -

Info

Publication number: JPH0458091U
Application number: JP10048790U
Authority: JP
Priority date: 1990-09-26
Filing date: 1990-09-26
Publication date: 1992-05-19

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の構成図、第２図
は従来例の構成図、第３図は各部の波形図を示す
図である。２……コンバータトランス、２Ｐ……１次巻線
、２Ｓ……２次巻線、２Ｂ……ベース巻線、３，
２３，２５……トランジスタ、２１……ＰＮＰ形
トランジスタ、４，９，１３……コンデンサ、１
２……ダイオード、１８……比較器。 FIG. 1 is a block diagram of an embodiment of this invention, FIG. 2 is a block diagram of a conventional example, and FIG. 3 is a diagram showing waveforms of various parts. 2...Converter transformer, 2P...Primary winding, 2S...Secondary winding, 2B...Base winding, 3,
23, 25...Transistor, 21...PNP transistor, 4,9,13...Capacitor, 1
2...Diode, 18...Comparator.

Claims

[Claims for Utility Model Registration] A DC power source is connected to a series circuit of a switching element consisting of a primary winding of a converter transformer and a transistor, and the base winding of the converter transformer is connected to the base of the transistor. In a ringing chain converter type power supply device, the DC power supply is connected to the DC power supply via a starting resistor, and the voltage obtained at the secondary winding of the converter transformer is rectified and smoothed to obtain an output voltage. A variable impedance element is inserted between the base and the base winding of the converter transformer, and level detection means for detecting the level of the output voltage is provided, and based on the detection signal from the level detection means, the variable impedance element is A ringing chain yoke converter power supply with controlled impedance.