Direct torque control of novel transverse flux permanent magnet motor based on phase advance commutation

Novel transverse flux permanent magnet motor (TFPMM) with Brushless DC drive is expected to be applied to direct-drive electric vehicles. To reduce torque ripple and obtain faster torque response, direct torque control (DTC) with position sensors instead of flux linkage observer has been employed. The voltage vectors are determined by position of magnetic poles as well as torque hysteresis comparator. In consideration of much longer commutation process caused by the features of novel TFPMM, phase advance commutation has been brought in DTC to achieve maximum torque per ampere. Simulation results have been presented to verify the effectiveness of the proposed method.