Switching power supply circuit

Details Switching power supply circuit Switching power supply circuit

2007-01-30

2007-01-30

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S098000, C363S025000

Reexamination Certificate

active

11143987

ABSTRACT:
A switching power supply circuit includes a primary side series resonant circuit forming a current resonant converter, and a secondary side series resonant circuit formed by at least a secondary winding and a secondary side series resonant capacitor, whereby a coupling type resonant circuit is formed by magnetic coupling of an isolated converter transformer. In order to obtain a unimodal characteristic for this coupling type resonant circuit, the total coupling coefficient of the isolated converter transformer is set to 0.65 or lower. For power factor improvement, a power factor improving circuit of a power regeneration system or a voltage feedback system is provided.

REFERENCES:
patent: 4128868 (1978-12-01), Gamble
patent: 5274543 (1993-12-01), Loftus, Jr.
patent: 6310792 (2001-10-01), Drobnik
patent: 6583999 (2003-06-01), Spindler et al.
patent: 6930893 (2005-08-01), Vinciarelli
patent: 06-327246 (1994-11-01), None

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