Modeling and simulation of six-phase fault-tolerant permanent magnet motor vector control system

In order to improve the control performance of the six-phase fault tolerant permanent magnet (FTPM) motor drive in healthy and faulty conditions, the vector control technique for this motor drive is studied in this paper. Based on the analysis of the structure and operating principle, the mathematical models in the rotational coordinate system and the simulation model of vector control system using SVPWM technique for this motor drive are established. The simulation results shows that the designed vector control system for six-phase FTPM motor drive can quickly track the required speed and output torque. After one-phase open-circuit fault, through properly increasing the current in healthy windings, the motor drive can still provide the same output torque as in healthy operation and the torque ripple is not increased obviously.