间接矩阵变换器供电电励磁同步电动机DTC

摘要

Conventional matrix converter has the advantages of no DC capacity, bidirectional power flowing,adjustable input power factor and pure sine waveforms at line and load sides. However,commutation problem is complicated. A new direct torque control(DTC) for electrically excited synchronous motor(ESM) supplied by indirect matrix converter(IMC) was investigated, where, the rectify stage controls the input power factor,the inversion stage controls torque and stator flux linkage,and all bidirectional switches at line side turn on and turn off at zero current by inserting zero voltage vector at the inverter side. The experimental results are provided to verify its feasibility.%直接型矩阵变换器具有无直流储能环节、输入与输出电流波形均为正弦波、能量双向流通、网侧功率因数可控等优点,但换流复杂.研究了一种间接矩阵变换器(IMC)供电电励磁同步电动机(ESM)直接转矩控制(DTC)系统,其整流级实现电网侧单位功率因数控制,逆变级实现转矩和磁链控制,采用逆变级插入零矢量方式实现前端整流级双向开关的换流.实验结果证明了这一控制策略的可行性.