Direct torque control of multi-phase permanent magnet synchronous motor drive: application to a five-phase

This paper describes an investigation of direct torque control for multi-phase permanent magnet synchronous motor drives. First, using the multi-machine multi-converter system concept, a multi-phase drive is divided into a set of fictitious one or two-phase drives. Each reference voltage vector of a fictitious drive is then computed with a simple direct torque control (DTC) algorithm. Finally, the voltage vector of the real machine is computed according to the reference voltage vector of each fictitious drive. Experimental results are presented for a 750 W five-phase permanent magnet drive prototype