Direct torque control of speed sensorless five-phase IPMSM based on adaptive input-output feedback linearization

Nowadays, the five-phase permanent magnet motors have attracted the attention of many researchers. In this paper, discusses a direct torque control (DTC) of five-phase permanent magnet motor based on adaptive input-output feedback linearization. The reference values of the controller are obtained on the basis of the maximum torque per ampere (MTPA) strategy. Direct and quadrature axis inductances (Ld, Lq) of the machine are online estimated by the use of Lyapunov stability theorem. A two-level SVPWM inverter is desired to feed the motor. The switching pattern of this inverter is designed to eliminate the zero sequence current. The capability of the proposed method is verified by computer simulation results.