JPS6412489U

JPS6412489U -

Info

Publication number: JPS6412489U
Application number: JP10513787U
Authority: JP
Priority date: 1987-07-08
Filing date: 1987-07-08
Publication date: 1989-01-23
Anticipated expiration: 2002-07-08
Also published as: JPH0540714Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係るスイツチング電源の電気
回路図、第２図はブリツジ式のスイツチング電源
の回路図、第３図及び第４図は第２図のスイツチ
ング電源に用いられるパルストランス回路図、第
５図はハーフブリツジ式のスイツチング電源の回
路図、第６図及び第７図は第５図のスイツチング
電源に用いられるパルストランス回路図、第８図
は本考案に係るスイツチング電源の別の実施例に
おける電気回路図、第９図は従来のスイツチング
電源の電気回路図、第１０図ａ，ｂは同じく各部
の電圧波形図である。１……直流電源、２……電力変換用トランス、
３，３１，３２……スイツチング素子、４，４１
，４２……スイツチング素子、５，５Ａ，５Ｂ…
…パルストランス、１２，１２Ａ，１２Ｂ……コ
モンモードチヨークコイル、Ｂ_３，Ｂ_４，Ｂ_３１，Ｂ_３２，Ｂ_４１，Ｂ_４２……制御電極、Ｅ_３，
Ｅ_４，Ｅ_３１，Ｅ_３２，Ｅ_４１，Ｅ_４２……主電
極、Ｃ_３，Ｃ_４，Ｃ_３１，Ｃ_３２，Ｃ_４１，Ｃ_４
２……主電極。 FIG. 1 is an electric circuit diagram of a switching power supply according to the present invention, FIG. 2 is a circuit diagram of a bridge type switching power supply, and FIGS. 3 and 4 are pulse transformer circuit diagrams used in the switching power supply of FIG. Fig. 5 is a circuit diagram of a half-bridge type switching power supply, Figs. 6 and 7 are pulse transformer circuit diagrams used in the switching power supply of Fig. 5, and Fig. 8 is another embodiment of the switching power supply according to the present invention. FIG. 9 is an electric circuit diagram of a conventional switching power supply, and FIGS. 10a and 10b are voltage waveform diagrams of various parts. 1...DC power supply, 2...Power conversion transformer,
3, 31, 32...Switching element, 4, 41
, 42... switching element, 5, 5A, 5B...
...Pulse transformer, 12, 12A, 12B...Common mode choke coil, B ₃ , B ₄ , B ₃₁ , B ₃₂ , B ₄₁ , B ₄₂ ... control electrode, E ₃ ,
E ₄ , E ₃₁ , E ₃₂ , E ₄₁ , E ₄₂ ... Main electrode, C ₃ , C ₄ , C ₃₁ , C ₃₂ , C ₄₁ , C _{4
2} ...Main electrode.

Claims

[Claims for Utility Model Registration] (1) A power conversion transformer and a plurality of circuits whose main electrode circuits are connected in series to the input winding of the power conversion transformer and switch DC input supplied through the input winding. The device includes a switching element and a pulse transformer connected between a control electrode of the switching element and one main electrode, and converts the switching output taken out to the output winding of the power conversion transformer into direct current and outputs it. The switching power supply includes a switching element in which the one main electrode connected to the pulse transformer has an unstable potential, and the winding of the pulse transformer that drives the switching element has a common mode voltage.
A switching power supply characterized by having a chiyoke coil inserted and connected. (2) The switching power supply according to claim 1, wherein the chiyoke coil is connected to the output winding of the pulse transformer. (3) The switching power supply according to claim 1, wherein the chiyoke coil is connected to the input winding of the pulse transformer. (4) Utility model registration claim 1, characterized in that the plurality of switching elements connect a main electrode circuit in series through the input winding of the power conversion transformer and turn on and off at the same time. , second
The switching power supply according to item 3 or item 3. (5) The switching power supply according to claim 1, 2, or 3, wherein the plurality of switching elements constitute a bridge circuit. (6) The switching power supply according to claim 1, 2, or 3, wherein the plurality of switching elements constitute a half-bridge circuit. (7) The switching power supply according to claim 1, 2, or 3, wherein the plurality of switching elements constitute a push-pull circuit.