采用VSIC-MTPA的五相内嵌式永磁容错电机短路容错控制  

A Short-circuit Fault-tolerant Control for Five-phase IPMFTM by Adopting Virtual-signal-injection-based MTPA

作　　者：陈前[1] 顾理成 赵文祥[1] 刘国海[1] CHEN Qian;GU Licheng;ZHAO Wenxiang;LIU Guohai(Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle(School of Electrical and Information Engineering,Jiangsu University),Zhenjiang 212013,Jiangsu Province,China)

机构地区：[1]江苏省电动车辆驱动与智能控制重点实验室(江苏大学电气信息工程学院),江苏省镇江市212013

出　　处：《中国电机工程学报》2020年第21期7087-7093,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51707083,51877098);江苏省高校优势学科项目。

摘　　要：五相内嵌式永磁容错电机(five-phase interior permanent magnet fault-tolerant motor,IPMFTM)发生短路故障后,现有id=0容错控制策略不能利用电机内的磁阻转矩,无法维持容错运行的高转矩输出能力。为此,该文提出一种基于虚拟信号注入最大转矩电流比(virtual signal injection control-maximum torque per ampere,VSIC-MTPA)的短路容错控制。首先根据故障前后基波磁动势不变原则推导出基波降阶矩阵,构建故障下基波解耦模型;其次采用短路相电流与其反电势的关系求取抑制短路电流负面影响的补偿电压;最后通过注入虚拟高频信号获取容错控制下的MTPA因子,使电机运行于最大转矩点。通过实测20槽/14极IPMFTM故障运行下的动、静态特性,验证理论分析的正确性和可行性。When a five-phase interior permanent magnet fault-tolerant motor(IPMFTM) operates under a short-circuit fault, the existing i_d=0 fault-tolerant control strategy cannot use the reluctance torque of the motor and cannot maintain the high torque output. Therefore, a new short-circuit fault-tolerant control strategy based on virtual signal injection controlmaximum torque per ampere(VSIC-MTPA) was proposed. Firstly, the fundamental reduction matrix was derived based on the principle of maintaining the fundamental magnetomotive force pre-and post-fault, and the fundamental decoupling model under fault was constructed. Secondly, the relationship between the phase short-circuit current and its back-EMF was used to obtain the voltage that suppresses the influence of the short-circuit current. Finally, the MTPA factor under fault tolerance control was obtained by injecting a virtual highfrequency signal, so that the motor operates at the maximum torque point. The correctness and feasibility of the theoretical analysis was verified by measuring the dynamic and static characteristics of a 20-slot/14-ploe IPMFTM under fault operation.

关 键 词：五相内嵌式永磁电机 短路 磁阻转矩 虚拟信号注入最大转矩电流比 

分 类 号：TM351[电气工程—电机]