Martin Marietta Energy Systems, Inc.

Daoshen Chen

Jih-Sheng Lai

Matthew Bligh Scudiere

Clifford P White

John W McKeever

Robert W Young, Sr

George W Ott, Jr

A resonant, snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the main inverter switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter.

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Knoxville, TN, United States of America

Daoshen Chen