直接转矩控制在矿井运输电机控制系统中的应用  

Application of Direct Torque Control in Control System of Coal Conveyer

作　　者：周婧[1] 任一峰[1] 赵敏[2] 

机构地区：[1]中北大学,太原030051 [2]北京茨浮测控技术研究所,北京101101

出　　处：《煤矿机械》2011年第5期187-189,共3页Coal Mine Machinery

摘　　要：在矿井运输交流电机调速系统中,传统直接转矩控制开关频率低且不稳定,特别是低速区脉动大,不能满足高精度要求。提出了一种基于离散空间电压矢量调制(DSVM)的方法,并通过了Matlab/Simulink仿真。仿真结果表明,离散空间电压矢量调制方法能明显改善电流和转矩的波动且不增加电路和系统的复杂性。In speed modulation of coal conveyer,traditional direct torque control can＇t fulfill speed modulation in large-scale and high precision.It is especially obvious that the torque ripples are caused by the low and unstable switiching frequency in low speed range.A method based on DSVM is presented and a simulation with Matlab/Simulink is carried.Simulation results show that it significantly reduces the pulsation of torque and current without increasing the complexity of circuits and systems.

关 键 词：异步电机 直接转矩控制 离散空间矢量调制 转矩脉动 

分 类 号：TM301.2[电气工程—电机]