永磁同步电机相电流测量误差分析与补偿  

Measurement Error Analysis and Its Compensation for Phase Current of Permanent Magnet Synchronous Motor

作　　者：蔡志端[1] 王培良[1] 荀倩 姜媛媛[2] 荀博洋 

机构地区：[1]湖州师范学院工学院,湖州313000 [2]南京航空航天大学自动化学院,南京211106 [3]内蒙古农业大学机电工程学院,呼和浩特010018

出　　处：《电工技术学报》2016年第23期22-30,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(61573137);浙江省公益技术应用研究计划项目(2016C31115);湖州市公益性技术应用研究计划项目(2015GZ05)资助

摘　　要：为减小电流测量误差,满足永磁同步电机高性能调速要求,对相电流测量误差进行了分析与补偿。首先,介绍了电流测量误差产生原理,分析了测量误差对闭环调速系统性能的影响。然后,提出了一种对d轴电流进行分段积分的补偿策略,通过对d轴电流积分得到误差项,将其补偿到测量电流中。仿真和实验结果表明偏移误差和增益误差分别会引起转矩、转速在1倍角频率和2倍角频率处振荡,补偿策略可以很好地减小测量误差,从而减小转矩和转速周期性振荡。For permanent magnet synchronous motor,to reduce the measurement error of the phase current and meet the speed requirements of high performance,the measurement error analysis and its compensation for the phase current are completed in the paper. Firstly,the principle of the measurement errors is introduced,and the influence of the measurement errors on the performance of the closed-loop speed control system is analyzed. Then,a compensation strategy for the d-axis current in segmented integration is proposed. The d-axis current integration can get the error terms that is used for the compensation of the current measurement. Simulation and experimental results show that offset-errors and gain-errors will cause the oscillation of the torque and the speed with 1 time and 2 times angular frequencies. The compensation strategy can reduce the measurement errors greatly so as to reduce the periodic oscillation of the torque and the speed.

关 键 词：测量误差 偏移误差 增益误差 分段积分 周期性振荡 

分 类 号：TM315[电气工程—电机]