Single stage power converter and method of operation thereof

Details Single stage power converter and method of operation thereof Single stage power converter and method of operation thereof

1999-05-05

2000-11-07

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 17, H02M 3335

Patent

active

061445649

ABSTRACT:
A single stage power converter, a method of processing rectified AC power, and a power supply incorporating the converter or the method. In one embodiment, the converter is couplable via a rectifier to a source of AC power, has a filter capacitor and an isolation transformer with a primary winding, and includes: (1) a significant energy storage device coupled to the primary winding, (2) a first switch, coupled to the primary winding, that conducts intermittently to couple the primary winding to the rectifier to transfer a portion of rectified AC power to a magnetizing inductance of the isolation transformer and (3) a second switch, coupled between the primary winding and the significant energy storage device, that conducts alternately with the first switch, the first and second switches substantially zero-voltage switching and the converter correcting a power factor of the AC power.

REFERENCES:
patent: 4017702 (1977-04-01), Harmon et al.
patent: 5430633 (1995-07-01), Smith
patent: 5619400 (1997-04-01), Bowman et al.
patent: 5619404 (1997-04-01), Zak
patent: 5646832 (1997-07-01), Pulhamus, Jr. et al.
patent: 5719754 (1998-02-01), Fraidlin et al.
patent: 5796595 (1998-08-01), Cross
patent: 5822198 (1998-10-01), Fraidlin et al.

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