【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。更多还原

【Abstract】 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 continuous according to the different speeds,and different switching tables were established,thus the large torque ripple was avoided.The simulation results prove that torque ripple and current ripple are reduced significantly.更多还原