Title:
SWITCHING POWER SUPPLY
Document Type and Number:
Japanese Patent JP3235711
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To highly efficiently operate a switching power supply while the loss, noise, and surge of the power unit are reduced by providing a serial circuit of two auxiliary switching elements in parallel with a serial circuit of two main switching elements.
SOLUTION: A serial circuit of switching elements 26 and 27 is connected in parallel with a serial circuit of switching elements 4 and 7 constituting a half-bridge circuit and diodes 30 and 31 are respectively connected in series with the elements 26 and 27 in the forward direction. A serial circuit of the auxiliary winding 13-1 of a main transformer 12 and a reactor 25 is connected between the common point of the elements 4 and 7 and that of the elements 26 and 27 so that switching energy can be fed back to a power supply through the primary winding of the transformer 13. Therefore, the switching losses of the main switching elements can be reduced by utilizing the resonant action of the switching.
Inventors:
Yoshiaki Matsuda
Taisuke Endo
Joe Kumagai
Taisuke Endo
Joe Kumagai
Application Number:
JP2333596A
Publication Date:
December 04, 2001
Filing Date:
January 16, 1996
Export Citation:
Assignee:
Shindengen Industry Co., Ltd.
International Classes:
H02M3/335; H02M7/48; H02M7/5387; (IPC1-7): H02M3/335; H02M7/48; H02M7/5387
Domestic Patent References:
| JP2155467A | ||||
| JP1164267A |