Single-stage AC/DC conversion with PFC-tapped transformers

Details Single-stage AC/DC conversion with PFC-tapped transformers Single-stage AC/DC conversion with PFC-tapped transformers

1997-08-29

1999-12-21

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

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

363131, H02M 3335

Patent

active

060057807

ABSTRACT:
Improved AC/DC conversion in power supplies having an isolation transformer located between rectified-AC input and DC output leads. The transformer is given a primary winding having one or more taps, and a positive input lead is connected thereto by a corresponding number of intermediate leads, each containing selected components. The improvement not only enables power factor correction (PFC) but also desired adjustment of or control over other operational variables, such as bulk capacitor voltage stress, output regulation, and overall efficiency, often at a reduction in circuit complexity and cost.

REFERENCES:
patent: 4607319 (1986-08-01), Assow et al.
patent: 5331534 (1994-07-01), Suzuki et al.
patent: 5600546 (1997-02-01), Ho et al.
patent: 5652700 (1997-07-01), Tsai et al.
patent: 5673184 (1997-09-01), Rilly et al.
patent: 5790389 (1998-08-01), Hua

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