A Novel Torque Quality Improvement of an Asymmetric Windings Permanent-Magnet Synchronous Motor

This paper introduces a new control approach to improve the output torque quality of a surface-mounted permanent-magnet synchronous motor with asymmetric windings. The impact of the asymmetry is reflected in the newly developed mathematical model of the motor based on dq0 voltages, flux linkages, and torque. Using this model, a control strategy based on vector control technique is proposed. This algorithm aims to eliminate the zero-sequence current, thereby improving the motor performance. The capability of the proposed algorithm has been demonstrated via simulation and experimental results.