In order to improve the performance of permanent magnet synchronous traction motor （PMSTM） in electric vehicle （EV） drive, a novel direct torque control （DTC） strategy is proposed. Based on the operating mode of PMSTM, zero voltage vectors are chosen to obtain quick dynamic torque response and reduce inverter switching loss. An optimization control method about stator flux linkage is presented to improve system efficiency, the core of which is the real-time regulation of stator flux linkage by measuring inverter input power. Simulation and experimental results prove the proposed strategy.
Transactions of China Electrotechnical Society
This project has been supported by China Postdoctoral Science Foundation and the National High Technology Research and Development Program of China （2003AA501100）.
Electric vehicle, permanent magnet synchronous traction motor, direct torque control
Xu Jiaqun, male, born in 1973, PhD degree, his research interest is special electrical machines technique.
Ouyang Minggao, male, born in 1958, Ph D degree, professor, director of state key laboratory of automotive safety and energy, his research interests are automotive powertrain and new energy technique.