摘要
传统的异步电动机直接转矩控制(DTC)受电压源逆变器(VSI)电压矢量数量限制,不能合理地制定开关表,造成了转矩脉动过大。采用离散空间矢量调制(DSVM)方法对其进行改进,增加了可选择的电压矢量,使电压矢量在幅值和相位上较为连续,并且根据转速不同分别制定了开关表,避免了较大转矩脉动出现。仿真结果证明转矩脉动、电流脉动明显减小。
Due to the limited number of the voltage vectors, direct torque control （DTC） can ＇ t establish the reasonable switching table, so the torque ripple is large. The problems of DTC was ouercome using discrete space vector modulation （DSVM） , in which, the number of voltage vectors was increased, the value and phase of voltage vectors were more continu- ous according to the different speeds, and different switching tables were established, thus the large torque ripple was avoi- ded. The simulation results prove that torque ripple and current ripple are reduced significantly.
出处
《微特电机》
北大核心
2009年第10期53-55,68,共4页
Small & Special Electrical Machines
基金
河南省科技攻关项目(082102240086)
河南科技大学科研基金项目(2003ZY27)
关键词
直接转矩控制
离散空间矢量调制
转矩脉动
direct torque control
discrete space vector modulation
torque ripple
