基于转矩误差带的表贴式永磁同步电机MPTC系统精简策略  

Simplified Control Strategy for SPMSM MPTC System Based on Band of Torque Error

作　　者：李耀华[1] 曲亚飞 刘子焜 杨启东 LI Yaohua;QU Yafei;LIU Zikun;YANG Qidong(School of Automobile,Chang’an University,Xi’an 710064,China;Suzhou Inovance Technology Co.,Ltd.,Suzhou 215104,China)

机构地区：[1]长安大学汽车学院,陕西西安710064 [2]苏州汇川技术有限公司,江苏苏州215104

出　　处：《电机与控制应用》2020年第12期25-31,64,共8页Electric machines & control application

基　　金：国家自然科学基金项目(51207012);陕西省工业科技攻关项目(2016GY-069);陕西省微特电机及驱动技术重点实验室开放基金项目(2013SSJ2002);中央高校基本科研业务费专项资金项目(300102228201)。

摘　　要：传统表贴式永磁同步电机(SPMSM)模型预测转矩控制(MPTC)需要遍历逆变器生成的全部7个电压矢量,计算量较大。由于零电压矢量使得磁链和转矩缓慢变化,常在转矩误差较小时,被用于保持磁链和转矩。分析了不同转矩误差带下,传统MPTC对零电压矢量使用情况,提出通过转矩误差带动态调整备选电压矢量。当转矩误差位于误差带之内时,电机系统直接输出零电压矢量,无需MPTC,否则,采用逆变器生成的6个非零电压矢量。仿真结果表明:基于转矩误差带的精简控制策略的SPMSM系统运行正常。与传统MPTC相比,控制性能基本相当,平均开关频率降低至20%,平均遍历次数降低至12.43%,有效减少了系统计算负担。The conventional surface permanent magnet synchronous motor(SPMSM)model predictive torque control(MPTC)system uses all 7 voltage vectors generated by voltage source inverter(VSI),which causes large calculation burden.As zero voltage vector changes stator flux and torque very slowly,it is often used to maintain stator flux and torque when the torque error is small.The utilization rates of zero voltage vector in SPMSM MPTC system at different bands of torque error are analyzed.A simplified control strategy for SPMSM MPTC system based on band of torque error is proposed.When the torque error is within the band,the system outputs zero voltage vector directly without the MPTC calculation,otherwise 6 non-zero voltage vectors are used as candidate voltage vectors for MPTC.Simulation results show that the proposed SPMSM MDTC system works properly.Compared with the conventional MPTC,the control performance of the proposed system is almost the same,but the average switching frequency and the average MPTC calculation time decrease to 20%and 12.43%of those of the conventional one,respectively.Therefore,the simplified control strategy reduces the calculation burden dramatically.

关 键 词：表贴式永磁同步电机 模型预测转矩控制 零电压矢量 转矩误差带 计算负担 

分 类 号：TM341[电气工程—电机]