AC-DC converter

Details AC-DC converter AC-DC converter

1993-09-28

1995-10-10

Pellinen, A. D.

Electric power conversion systems

Current conversion

With voltage multiplication means

323222, 363 49, H02M 318

Patent

active

054576229

ABSTRACT:
A power-factor improved AC-DC converter has a rectifier circuit, a booster converter circuit and a DC-DC converter circuit. A winding on a converter transformer of the DC-DC converter circuit supplies power to both a DC-DC converter control circuit and a booster converter control circuit. In starting up the AC-DC converter, the DC-DC converter circuit is started first, followed by start of operation of the booster converter circuit. With this arrangement, power-factor improved AC-DC converter can be realized with minimum increase in the size and production cost, and the start-up characteristic is improved to avoid failure of start up of the AC-DC converter.

REFERENCES:
patent: 4866590 (1989-09-01), Odaka et al.
patent: 5359274 (1994-10-01), Bandel
patent: 5371667 (1994-12-01), Nakao et al.
patent: 5373195 (1994-12-01), De Doncker et al.

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