双五相永磁同步电机串联系统SVPWM控制策略

Control Strategy for Dual Five-phase Permanent Magnet Synchronous Motors Series-connected System Based on SVPWM

针对反电动势为梯形波的双五相凸极式永磁同步电机(PMSM)串联系统,提出一种电机串联系统四矢量双平面空间矢量脉宽调制(SVPWM)控制策略。该策略在两台PMSM的电压基波平面选取4个电压矢量,分别合成参考电压矢量,从而实现两台五相PMSM转矩的解耦控制。该策略与基于开关矢量表的传统直接转矩控制(DTC)策略相比,具有转矩脉动小、计算量少等优势。通过仿真和实验验证了所提策略的正确性和可行性。

A double plane space vector pulse width modulation (SVPWM) algorithm based on four voltage vectors is proposed to control a series system of dual five-phase permanent magnet synchronous motor(PMSM) with trapezoidal wave back electromotive force.The algorithm selects four voltage vectors in two voltage fundamental planes of two motors. These voltage vectors are used to synthesize the reference voltage vector to realize decoupling control of two motors independently, without interference.Compared with the traditional direct torque control (DTC) algorithm based on the switch vector table, this algorithm has the advantages of smaller torque ripple, small amount of calculation.The correctness and feasibility of the proposed algorithm are verified by the simulation and experiment.