摘要
本文研究了永磁同步电机(PMSM)直接转矩控制(DTC)系统,DTC系统普遍存在着在低速运行时,转矩脉动比较大的不足。本文具体分析了零电压矢量对转矩的作用,根据加入的零电压矢量作出了新的开关表,仿真结果表明:在保持了PMSM直接转矩控制系统优良的特性同时,使转矩脉动有显著减小。
This paper studies the permanent magnet synchronous motor （PMSM） direct torque control （DTC） system, DTC has drawbacks that the ripples in torque are relatively higher at low speed. The thesis analyzes the reasons of DTC system for the existence of torque ripple, and uses the nonlinear perpendicular flux observer with compensation feedback, solves the problems associated with traditional flux observer, and studies the effect of zero-voltage vector to the torque, uses the switch table that add the zero-voltage vector. Through analyze the results of simulation, it can reduce the torque ripple.
出处
《电气技术》
2012年第7期8-10,30,共4页
Electrical Engineering
关键词
永磁同步电机
零电压矢量
直接转矩控制
仿真
PMSM
the zero voltage space vector~ direct torque control
DTC
simulation
