永磁同步电机电流控制策略比较分析  

Comparative Analysis on Current Control Methods of Permanent Magnet Synchronous Motor

作　　者：王子昭 费骏韬 史林军[1] 朱瑛[1] 吴峰[1] WANG Zizhao;FEI Juntao;SHI Linjun;ZHU Ying;WU Feng(College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;State Grid Jiangsu Electric Power Company Research Institute, Nanjing 211103, China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]国网江苏省电力公司电力科学研究院,江苏南京211103

出　　处：《电机与控制应用》2019年第5期64-71,共8页Electric machines & control application

基　　金：国网总部科技项目(SGTYHT/17-JS-199)

摘　　要：在电机控制中根据场合要求会采用不同的电流控制策略。对永磁同步电机的4种主要电流控制策略进行了分析并总结了各自的特点。主要针对最大转矩电流比(MTPA)控制、零直轴电流(id=0)控制、单位功率因数(cosφ=1)控制以及恒磁链控制方法,在转矩确定的情况下,对交直轴电流、定子电流及功率因数进行比较分析。按照不同控制方式在MATLAB/Simulink中搭建了仿真模型。4种不同控制方法的仿真试验表明:定子电流幅值从高至低依次为cosφ=1控制、恒磁链控制、id=0控制和MTPA控制;功率因数从高至低依次为cosφ=1控制、恒磁链控制、MTPA控制和id=0控制。最后对比分析了凸极系数不同时4种控制方法的电流和功率因数变化。Different current control methods were adopted in motor control according to different occasion requirements. Four main current control methods of permanent magnet synchronous motor were analyzed and their characteristics were summarized. The changes of d-axis and q-axis current, stator current and power factor were analyzed when the torque was the same for the maximum torque per ampere (MTPA) control, zero d -axis current ( id= 0 ) control, unity power factor (cosφ=1) control and constant flux linkage control. Four simulation models were built in MATLAB/Simulink software corresponding to different control methods. The simulation results of four current control methods showed that the stator currents from high to low were those of cosφ=1 control, constant flux linkage control, i d=0 control, MTPA control;the power factors from high to low were those of cos φ=1 control, constant flux linkage control, MTPA control, i d=0 control. Finally, the changes of current and power factor of four control methods were compared and analyzed when salient coefficient was different.

关 键 词：永磁同步电机 最大转矩电流比控制 零直轴电流控制 单位功率因数控制 恒磁链控制 凸极系数 

分 类 号：TM301.2[电气工程—电机]