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Electrical system for pulse-width modulated control of a power inverter using phase-shifted carrier signals and related operating methods

United States Patent

8,115,433
February 14, 2012
View the Complete Patent at the US Patent & Trademark Office
Systems and methods are provided for pulse-width modulated control of power inverter using phase-shifted carrier signals. An electrical system comprises an energy source and a motor. The motor has a first set of windings and a second set of windings, which are electrically isolated from each other. An inverter module is coupled between the energy source and the motor and comprises a first set of phase legs coupled to the first set of windings and a second set of phase legs coupled to the second set of windings. A controller is coupled to the inverter module and is configured to achieve a desired power flow between the energy source and the motor by modulating the first set of phase legs using a first carrier signal and modulating the second set of phase legs using a second carrier signal. The second carrier signal is phase-shifted relative to the first carrier signal.
Welchko; Brian A. (Torrance, CA)
GM Global Technology Operations LLC (Detroit, MI)
12/ 236,172
September 23, 2008
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.