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Discharging a DC bus capacitor of an electrical converter system

United States Patent

October 14, 2014
View the Complete Patent at the US Patent & Trademark Office
A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.
Kajouke; Lateef A. (San Pedro, CA), Perisic; Milun (Torrance, CA), Ransom; Ray M. (Big Bear City, CA)
GM Global Technology Operations LLC (Detroit, MI)
13/ 090,911
April 20, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided by the terms of contract number DE-FC26-07NT43123 awarded by the United States Department of Energy.