Boost-up power factor correcting circuit using a power feedback

Details Boost-up power factor correcting circuit using a power feedback Boost-up power factor correcting circuit using a power feedback

1998-06-16

1999-08-31

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

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

363 60, H02M 3335

Patent

active

059462019

ABSTRACT:
A boost-up power factor correcting circuit using a power feed back capable of stably supplying the power source to the load by correcting a power factor, so that the power is fed-back in a high-frequency current using an auxiliary winding to be included in an SMPS transformer. The circuit includes a rectifying section for rectifying an inputted AC voltage, an inductor transformer, having a first inductor winding connected to the rectifying section and a second inductor winding, for accumulating a magnetic energy, an SMPS transformer having a primary winding connected to the first inductor winding of the inductor transformer and an auxiliary winding connected to the second inductor winding of the inductor transformer, the auxiliary winding generating a voltage having a phase opposite to that of a voltage applied to the primary winding, a power feedback section connecting in a closed loop the auxiliary winding of the SMPS transformer and the second inductor winding, for feedingback the magnetic energy accumulated at the auxiliary winding, and a switching control section connected to the primary winding of the SMPS transformer, for controlling the switching operation of the SMPS transformer.

REFERENCES:
patent: 4214189 (1980-07-01), Bohringer
patent: 4937722 (1990-06-01), Deierlein
patent: 4949233 (1990-08-01), Braunisch et al.
patent: 5513088 (1996-04-01), Williamson
patent: 5559395 (1996-09-01), Venkitasubrahmanian et al.
patent: 5751115 (1998-05-01), Jayaraman et al.
patent: 5877946 (1999-03-01), Fitzgerald

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