US 7,528,562 B2
Method and apparatus for controlling an electric motor using star voltage modulation
Paul H. Kahler, Shelby Township, Mich. (US); and Kevin McLaughlin, Troy, Mich. (US)
Assigned to TRW Automotive U.S. LLC, Livonia, Mich. (US)
Filed on May 12, 2006, as Appl. No. 11/433,374.
Prior Publication US 2007/0262744 A1, Nov. 15, 2007
Int. Cl. H02P 21/00 (2006.01)
U.S. Cl. 318—400.02  [318/432; 318/434] 45 Claims
OG exemplary drawing
 
1. A method for controlling an electric motor, said method comprising the steps of:
determining multi-phase voltage command values;
determining a star voltage of the electric motor;
determining multi-phase voltage output command values as a function of said star voltage and said multi-phase voltage command values; and
supplying multi-phase voltage to said electric motor in accordance with said multi-phase voltage output command values to energize the electric motor.