JPS6351584U

JPS6351584U -

Info

Publication number: JPS6351584U
Application number: JP14341386U
Authority: JP
Priority date: 1986-09-18
Filing date: 1986-09-18
Publication date: 1988-04-07

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例による回路構成図、
第２図は本考案の他の実施例による回路構成図、
第３図、第４図および第５図は本考案の動作説明
図、第６図は本考案の１次側から見た抵抗分等価
回路、第７図は従来のスイツチング電源回路の構
成図である。ＴＦは絶縁トランス、Ｓ_１，Ｓ_２，Ｓ_３はスイ
ツチング素子、Ｄはダイオード、Ｃ，Ｃ_１は平滑
用コンデンサ、Ｃ_２はサージ吸収用コンデンサ、
Ｒは抵抗、Ｒ_１は負荷側の１次側より見た等価抵
抗、Ｖ_０は直流出力電圧、１はスナバ回路、２は
ダイオードブリツチによる整流回路、３，４は第
２のスイツチング回路、５は第１のスイツチング
回路。 FIG. 1 is a circuit configuration diagram according to an embodiment of the present invention.
FIG. 2 is a circuit diagram according to another embodiment of the present invention;
Figures 3, 4, and 5 are explanatory diagrams of the operation of the present invention, Figure 6 is a resistance equivalent circuit of the present invention as seen from the primary side, and Figure 7 is a configuration diagram of a conventional switching power supply circuit. be. TF is an isolation transformer, S ₁ , S ₂ , S ₃ are switching elements, D is a diode, C, C ₁ are smoothing capacitors, C ₂ is a surge absorption capacitor,
R is a resistance, _R1 is an equivalent resistance seen from the primary side of the load side, _V0 is a DC output voltage, 1 is a snubber circuit, 2 is a rectifier circuit using a diode brittle, 3 and 4 are a second switching circuit, 5 is the first switching circuit.

Claims

[Claims for Utility Model Registration] (1) In a switching power supply circuit having an isolation transformer and a switching element connected in series with a DC power supply, a first switch is connected in parallel with the switching element and is turned on when the switching element is turned off. 1. A switching power supply circuit comprising: a series circuit of a switching circuit and a surge absorbing capacitor; and a second switching circuit connected in antiparallel to the first switching circuit. (2) The switching power supply circuit according to claim 1, wherein the first switching circuit comprises a thyristor. (3) The switching power supply circuit according to claim 1, wherein the first switching circuit is composed of a diode.