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Methods, systems and apparatus for controlling operation of two alternating current (AC) machines

United States Patent

June 5, 2012
View the Complete Patent at the US Patent & Trademark Office
A system is provided for controlling two alternating current (AC) machines via a five-phase PWM inverter module. The system comprises a first control loop, a second control loop, and a current command adjustment module. The current command adjustment module operates in conjunction with the first control loop and the second control loop to continuously adjust current command signals that control the first AC machine and the second AC machine such that they share the input voltage available to them without compromising the target mechanical output power of either machine. This way, even when the phase voltage available to either one of the machines decreases, that machine outputs its target mechanical output power.
Gallegos-Lopez; Gabriel (Torrance, CA), Nagashima; James M. (Cerritos, CA), Perisic; Milun (Torrance, CA), Hiti; Silva (Redondo Beach, CA)
GM Global Technology Operations LLC (Detroit, MI)
12/ 473,988
May 28, 2009
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.