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

United States Patent

February 14, 2012
View the Complete Patent at the US Patent & Trademark Office
A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase PWM inverter module coupled to the two AC machines, and a boost converter coupled to the inverter module and the DC input voltage source. The boost converter is designed to supply a new DC input voltage to the inverter module having a value that is greater than or equal to a value of the DC input voltage. The VBCCM generates a boost command signal (BCS) based on modulation indexes from the two AC machines. The BCS controls the boost converter such that the boost converter generates the new DC input voltage in response to the BCS. When the two AC machines require additional voltage that exceeds the DC input voltage required to meet a combined target mechanical power required by the two AC machines, the BCS controls the boost converter to drive the new DC input voltage generated by the boost converter to a value greater than the DC input voltage.
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/ 473,964
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.