Power supply with power factor correction circuit

Details Power supply with power factor correction circuit Power supply with power factor correction circuit

1996-11-27

1997-11-25

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 16, 363 20, H02M 542, H02M 3335, H02M 768

Patent

active

056918909

ABSTRACT:
Disclosed is a power supply which includes a transformer having a primary winding and a secondary winding. A rectifier circuit rectifies an input AC mains signal to produce a DC rectified mains signal. A power factor correction circuit transfers electrical power from the rectifier circuit to the primary winding. A switch is provided for transferring electrical power from the primary winding to the secondary winding. The power factor correction circuit includes a first diode having an anode connected to the rectifier circuit and a cathode connected to one end of the primary winding and a second diode having an anode connected to the rectifier circuit and a cathode connected to said one end of the primary winding via a snubber network. The correction circuit may also include a third diode having an anode connected to the rectifier circuit and a cathode connected to a second end of the primary winding via an inductor.

REFERENCES:
patent: 4947308 (1990-08-01), Gulczynski
patent: 5267132 (1993-11-01), Gulczynski
patent: 5331534 (1994-07-01), Suzuki et al.
patent: 5367448 (1994-11-01), Carroll
patent: 5459651 (1995-10-01), Maehara

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