摘要
针对异步电动机直接转矩控制系统中电压矢量对磁链幅值和转矩的不同影响,分析比较了两种12扇区磁链细分方法,在MATLAB环境下建立了异步电动机直接转矩控制系统的仿真模型,研究表明改进的12扇区磁链细分方法较常规12扇区磁链细分方法在磁链不能被精确观测情况下具有更好的控制性能,能有效地改善磁链轨迹畸变,减小转矩脉动.
Considering the influence of voltage space vector on the magnitude of stator flux and torque in direct torque control for asynchronous motor,a comparative analysis of two flux section subdividing methods is presented,and a DTC system model of asynchronous motor is constructed in MATLAB.The study proves that the improved 12 sections of flux section subdividing method has better control performance than the conventional one when the flux can not be observed accurately.It can improve the flux trajectory and reduce the torque ripples effectively.
出处
《大连交通大学学报》
CAS
2011年第4期83-86,共4页
Journal of Dalian Jiaotong University
关键词
直接转矩控制
12扇区开关表
转矩脉动
DTC； twelve-section voltage vector select tables； torque ripples
