This paper proposes a new 8/6-pole doubly salient permanent-magnet (DSPM) motor drive, which offers the advantages of higher power density, higher efficiency, and wider speed range. The corresponding control and operation of the motor drive are presented. A variable proportional-integral (PI) controller combined with bang-bang control for the DSPM motor drive is developed. Two operation modes, namely, four-phase and two-phase operation modes, are proposed for the 8/6-pole DSPM motor drive. The drive system is implemented and tested. The results show that the developed control scheme can operate the DSPM motor properly, and the DSPM motor drive offers high efficiency over wide power range and good dynamic performance. Furthermore, the two-phase operation mode of the 8/6-pole DSPM motor offers the possibility of eliminating the torque ripple of the motor drive.

本文从永磁同步电机的基本方程出发，通过对起动和牵入同步过程的分析，提出了永磁同步电机牵入同步判据，计算中考虑了脉动转矩幅值的变化和定子电阻的影响。对电机主要参数变化和负载性质不同时永磁电机牵入同步性能的变化规律进行了较深入的探讨，得出了一些有益的结论。