多套三相永磁同步电机缺相容错电流统一计算方法

Semi-symmetry and full symmetry are two common stator winding structures for multi-set three-phase permanent magnet synchronous motors. Aiming at the asymmetric phase-loss faults of multi-set three-phase permanent magnet synchronous motors with different winding structures, and taking the maximum output torque as the optimization objective, this paper proposes a unified calculation method for phase-loss fault-tolerant currents. This method comprehensively considers the parity of the number of motor phases and the differences in winding structures. By introducing even-order harmonic vectors and generalized zero-sequence vectors to reconstruct the decoupling matrix, it is applicable to the calculation of phase-loss fault-tolerant currents for any multi-set three-phase permanent magnet synchronous motors. Finally, the correctness of the calculation results is verified through a phase-loss fault-tolerant control test on a 9kW nine-phase semi-symmetric permanent magnet synchronous motor.

半对称与全对称是多套三相永磁同步电机常见的2种定子绕组结构。该文针对不同绕组结构的多套三相永磁同步电机不对称缺相故障,以输出转矩最大为优化目标,提出一种统一的缺相容错电流计算方法。该方法综合考虑电机相数的奇偶性及绕组结构的差异性,通过引入偶数次谐波矢量及广义零序矢量重构解耦矩阵,适用于任意多套三相永磁同步电机缺相容错电流计算。最后,通过一台9kW九相半对称永磁同步电机的缺相容错控制试验,验证计算结果的正确性。