Optimizing operation of DC-to-AC power converter

Details Optimizing operation of DC-to-AC power converter Optimizing operation of DC-to-AC power converter

2008-04-02

2010-11-23

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

Reexamination Certificate

active

07839666

ABSTRACT:
In one embodiment, a power converter system includes an input terminal for receiving a DC input voltage. The power converter system delivers AC power to a load at an output terminal. A transformer is coupled between the input terminal and the output terminal. The transformer has a first winding, a second winding, and a third winding. The output terminal is coupled to the second winding. A half-bridge circuit, coupled between the input terminal and the first winding of the transformer, includes a first switch and a second switch coupled at a common node. The first and second switches are operable to be turned on and off for causing current to flow in the transformer during operation of the power converter system. Circuitry is close coupled to the first winding of the transformer. The circuitry is operable to provide a current path for transformer magnetizing current and reflected load current when both the first and second switches of the half-bridge circuit are turned off, thereby preventing energy from being fed back to the half-bridge circuit.

REFERENCES:
patent: 4308576 (1981-12-01), Clark, Jr.
patent: 7092259 (2006-08-01), Jacobs
patent: 7203080 (2007-04-01), Aso et al.
patent: 7242595 (2007-07-01), Yasumura
patent: 7254046 (2007-08-01), Kawasaki et al.

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