Asymmetrical pulse width modulated resonant DC/DC converter

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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363 24, 363 98, 363131, H01M 3337

Patent

active

051595419

ABSTRACT:
New topologies for pulse width modulated resonant DC/DC converters are disclosed. The converters include a bridged chopper to convert the DC input to a high frequency AC which in turn is fed to a high frequency transformer whose secondary AC is rectified and filtered to produce a stable DC output. The bridged chopper has at least two semiconductor switches which alternately conduct. The duty cycles of the conduction of the switches are complementary with one another and adjustable to control the stable DC output. A resonant circuit is connected between the chopper and the high frequency transformer and contains a series capacitor, and a series or parallel inductor depending upon the preferred embodiment.

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