双三相永磁同步电动机直接转矩控制仿真研究

Study and Simulation of Direct Torque Control for Dual Three-Phase PMSM

针对双三相永磁同步电动机(PMSM)在采用传统的直接转矩控制时出现的定子谐波电流过大的问题,提出了一种基于三相解耦SVPWM技术的双三相PMSM直接转矩控制算法。通过重新合成12个基本电压矢量,不用改变开关表,在保证电机运行性能不受影响的情况下削弱定子电流的谐波分量,降低定子铜耗。该算法计算量小,易于实现,仿真结果证明了该算法的有效性。

High harmonic current will be produced in stator when the conventional direct torque control （DTC） method was applied to dual three-phase permanent magnet synchronous motors.A new DTC method was proposed for dual threephase PMSM based on three phase decomposition SVPWM technique.Twelve new basic voltage vectors were synthesized.With the same switch table,the motor can run with the same performance and the harmonic current can be reduced.This method has less calculation and is easy to realize.Simulation results show the effectiveness of the proposed method.