Single-stage AC/DC converters with saturable conductor PFC

Details Single-stage AC/DC converters with saturable conductor PFC Single-stage AC/DC converters with saturable conductor PFC

1998-06-01

2000-09-12

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

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

H02M 3335

Patent

active

061186732

ABSTRACT:
Single-stage switched AC/DC converters are provided with a PFC (power factor correction) lead enhanced by inclusion of a saturable reactor and/or by connecting the PFC lead to an intermediate tap in a primary winding of the customary isolation transformer located in the DC/DC conversion part of the converter. An important resulting improvement is reduction in the voltage stress on the energy-storage (or "bulk") capacitor. Included are various circuit arrangements of resetting the saturable inductor, for designer or user selection.

REFERENCES:
patent: 4553199 (1985-11-01), Harada et al.
patent: 5543704 (1996-08-01), Thoren
patent: 5636114 (1997-06-01), Bhagwat et al.
patent: 5652700 (1997-07-01), Tsai et al.
patent: 5764494 (1998-06-01), Schutten et al.
patent: 5790389 (1998-08-01), Hua
patent: 5815386 (1998-09-01), Gordon

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