A drive system for a three phase brushless AC motor is arranged to optimise the transistor switching pattern to improve power output whilst allowing current measurement in all of the phases using a single sensor. This is achieved by defining voltage demand vectors x where more than two states are required to meet a minimum state time requirement determined by the single sensor method, and calculating three or more state vectors which produce the demanded vector x whilst still allowing single current sensing. Various methods of optimising the PWM pattern so as to give maximum output whilst using single current sensing are also disclosed.
申请公布号
DE60334323(D1)
申请公布日期
2010.11.04
申请号
DE2003634323
申请日期
2003.06.05
申请人
TRW LTD.;TRW AUTOMOTIVE U.S. LLC
发明人
WILLIAMS, CONNEL BRETT;COLES, JEFFREY RONALD;SZABO, ADRIAN;DIXON, CHRISTOPHER DAVID;LI, JIANG;FARDOUN, ABBAS AHMAD