异步电机DTC系统转矩脉动最小化方案  

A Novel DTControl of Induction Motors for Minimum Torque Ripples

作　　者：李政学[1] 李正熙[2] 

机构地区：[1]延边大学,工学院,吉林延吉133002 [2]北方工业大学、电力电子与电气传动工程研究中心,北京100144

出　　处：《电力电子技术》2015年第8期83-85,共3页Power Electronics

基　　金：国家自然科学基金项目(51207003)~~

摘　　要：传统直接转矩控制(DTC)在电机低速运行时存在转矩脉动大、开关频率不固定等问题。在详细分析影响磁链和转矩脉动大小因素的基础上,提出一种新型DTC方法。该方法根据转矩斜率公式推导出转矩变化量最小的条件,进而确定出有效的电压矢量占空比。仿真和实验结果表明,新型DTC方法在保持传统DTC优点的基础上,能够有效减小转矩脉动,改善了传统DTC的性能。Disadvantages of traditional direct torque control （DTC） system for induction motor is high torque ripple and inconstant switching frequency in a low speed range.A novel DTC strategy of induction motors is proposed based on the detailed analysis of effect factors of flux linkage and torque ripples.In this method, the duty ratio of the active vector is calculated by the torque-ripple minimum condition.Simulation and experimental results show that the new DTC strategy has the advantages of traditional DTC and effectively reduces torque ripple which improve the performance of traditional DTC.

关 键 词：异步电机 占空比控制 直接转矩控制 

分 类 号：TM343[电气工程—电机]