Reciprocating converter

Details Reciprocating converter Reciprocating converter

1996-12-31

1998-06-16

Tso, Edward

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 21, 363131, 363 41, 323288, H02M 100

Patent

active

057681180

ABSTRACT:
A power converter which transfers energy from an output circuit coupled to a secondary winding of a power transformer to an input circuit coupled to a primary winding of the power transformer in order to reduce the power loss and electromagnetic interference (EMI) originating from a primary switch. The reciprocating action of the converter is accomplished by placing the series switched path of a secondary switch in parallel with a diode in the output circuit. A control circuit is coupled to the primary switch and the secondary switch which allows the inherent capacitance of each switch to discharge before turning on the respective switch, thereby reducing the EMI and power losses occurring at these switches. The control circuit includes feedback and feedforward voltage control of the switching duty cycle. The control circuit varies the energy transferred from the output circuit to the input circuit according to changes in the accumulated charge on the primary switch.

REFERENCES:
patent: 4189764 (1980-02-01), Snyder
patent: 4460951 (1984-07-01), Fenter et al.
patent: 5057986 (1991-10-01), Henze et al.
patent: 5594629 (1997-01-01), Steigerwald

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