Power supply circuit

Details Power supply circuit Power supply circuit

1993-04-26

1996-03-12

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 19, 363132, H02M 3325

Patent

active

054991757

ABSTRACT:
A power supply circuit includes a DC--DC converter, a switching inverter circuit connected to an output terminal of the DC--DC converter and an output circuit for rectifying and smoothing an output of the switching inverter circuit to provide a dc output. The DC--DC converter has a first inductance element inserted in series in at least one of an input terminal and an output terminal, and a second inductance element inserted between a reference potential terminal. The switching inverter circuit includes a switching circuit including an on-off controllable switching element for switching an input voltage to convert it to ac and outputting it, a current resonance circuit formed in series to current flowing to an output terminal of the switching circuit, a voltage resonance circuit formed in parallel to voltage produced at the output terminal of the switching circuit, and a timing control circuit for turning off the switching element of the switching circuit when its main current is zero and turning on the switching element when voltage across the switching element is zero.

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