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Title: Resonant snubber inverter

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.
Inventors:
 [1];  [2];  [1];  [2];  [1];  [1];  [2]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
Issue Date:
OSTI Identifier:
871021
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5642273
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
resonant; snubber; inverter; snubber-based; soft; switching; circuit; achieves; lossless; dc-to-ac; power; conversion; conditioning; minimum; component; count; size; current; supplied; branches; solely; main; switches; reduced; single; semiconductor; switch; maximizing; stray; capacitances; parallel; capacitors; resonance; charging; discharging; allows; zero; voltage; embodiment; minimized; achieving; three-phase; resonant snubber; component count; voltage switching; power conditioning; circuit component; zero voltage; power conversion; semiconductor switch; resonant capacitors; soft switching; parallel resonant; circuit achieves; minimum component; voltage switch; lossless switching; achieves lossless; dc-to-ac power; inverter circuit; /363/