Title:
RESONANT DC-DC CONVERTER
Document Type and Number:
Japanese Patent JP2561201
Kind Code:
B2
Abstract:
PURPOSE: To obtain a resonant DC-DC converter in which switching loss is reduced by controlling output voltage in PWM system while taking advantage of the features of resonant DC-DC converter.
CONSTITUTION: When a first switching element 11 is turned ON by a signal delivered from a PWM control circuit 41, a DC power supply 10 applies a square wave Vi onto a primary winding 14 thus transmitting energy to a secondary winding 15. Consequently, current in the resonant circuit for the secondary winding 15 increases gradually from 0 and eventually makes a transition to ON state. Thereafter, the current decreases along a resonant arch and finally reaches 0. ON interval of the first switching element 11 is controlled within a range not shorter than the resonant frequency. It is also true when a second switching element 12 is turned ON. In such a manner, ON interval of the first switching element 11 is controlled constant depending on the fluctuation of Vi or Vo.
Inventors:
KAWACHI TAMOTSU
Application Number:
JP15160892A
Publication Date:
December 04, 1996
Filing Date:
May 19, 1992
Export Citation:
Assignee:
MELS CORP
International Classes:
H02M3/28; (IPC1-7): H02M3/28
Domestic Patent References:
| JP2202359A | ||||
| JP6426363A | ||||
| JP62290356A | ||||
| JP3135368A | ||||
| JP356069A | ||||
| JP1110058A | ||||
| JP49125220U | ||||
| JP6226267B2 |
Attorney, Agent or Firm:
Toshiaki Furusawa (1 outside)
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