Design and Analysis of a High Torque Performance Dual-Side PM Vernier Motor With Synergetic Modulation Enhancement

In this article, a dual-side permanent magnet vernier (DSPMV) motor is proposed for the potential application in high torque density direct drive applications, where the research efforts are focus on realizing torque performance improvement. The key of this article is to improve the airgap magnetic field by designing the synergistic modulation effect of the stator and rotor permeance. The synergetic modulation mechanism of the airgap magnetic field by the stator and rotor permeance of the DSPMV motor is analyzed. The modulation effect of the stator and rotor permeance on the dual PM magnetic field is synergistic, so as to realize the harmonics aggregation. Next, the relationship between airgap harmonics and torque performance is analyzed, and the main harmonics related to torque and torque ripple are selected. Based on this, the synergetic modulation effect on the airgap magnetic field of the motor is enhanced by optimizing the parameters related to the stator and rotor permeances, and by suppressing the harmonics that generate torque ripple and enhancing the harmonics that generate torque, the torque performance of the motor is effectively improved. Finally, the performance of the DSPMV motor is evaluated to verify the effectiveness of the design method.