五相永磁容错电机的相间短路容错控制  

Inter-Phase Short-Circuit Fault-Tolerant Control for Five-Phase Permanent Magnet Fault-Tolerant Motors

作　　者：顾理成 陈前[1,2] 赵文祥 刘国海[1,2] 夏雨航 Gu Licheng;Chen Qian;Zhao Wenxiang;Liu Guohai;Xia Yuhang(School of Electrical and Information Engineering Jiangsu University,Zhenjiang 212013 China;National Center for International Research on Structural Health Management of Critical Components,Zhenjiang 212013 China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013 [2]高端装备关键结构健康管理国际联合研究中心,镇江212013

出　　处：《电工技术学报》2022年第8期1972-1981,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(52077097,51707083);江苏省高等学校自然科学研究项目(20KJA470003);江苏省高校优势学科项目资助。

摘　　要：永磁电机发生短路故障后,电机内的短路电流急剧增大,电机系统将失去平稳性,威胁重大装备的运行安全。与其他短路故障相比,相间短路破坏性最强。针对这一严重故障,该文提出一种五相永磁容错电机的相间短路容错控制。以稳定的输出转矩为目标,从消除相间短路引起的断相和短路电流这两个负面影响出发,构建最优容错电流。利用故障前后磁动势不变的基波降阶矩阵,重构非故障相电流,弥补相间短路下断相引起的转矩损失和转矩脉动。进一步地,在非故障相中注入补偿电流,以注入电流与短路电流的磁动势和为零为原则,抑制短路电流引起的转矩脉动。利用叠加原理合成所需容错电流,并通过载波脉宽调制技术固定所提容错控制的开关频率。最后,通过实测20槽/14极五相永磁容错电机故障,容错运行下的动、静态特性,验证了所提控制策略的正确性和可行性。After occurring a short-circuit fault in a permanent magnet motor, the short-circuit current increases sharply in the motor, and the motor system will lose stability, threatening the operational safety of major equipment. Compared with other short-circuit faults, the inter-phase short-circuit is the most destructive. For this serious fault, an inter-phase short-circuit fault-tolerant control of a five-phase fault-tolerant permanent magnet motor(FTPMM) is proposed. Aiming at stable output torque, the proposed method starts from eliminating the two negative effects of phase loss and short-circuit current caused by inter-phase short-circuit, and constructs the optimal fault-tolerant current. Using the fundamental reduction order matrix with the same magnetomotive force before and after fault, the non-fault phase current is reconstructed to compensate for the torque loss and torque ripple caused by the loss of phase under the inter-phase short circuit. Further, the compensation current is injected into the non-faulty phases, and the torque pulsation caused by the short-circuit current is suppressed based on the principle that the sum of the magnetomotive force of the injected current and the short-circuit current is zero. The superposition principle is used to synthesize the required fault-tolerant current, and the switching frequency of the proposed fault-tolerant control is fixed through the carrier pulse width modulation technology. Finally, the correctness and feasibility of the proposed control strategy are verified by measuring the dynamic and static characteristics of a 20-slot/14-pole five-phase FTPMM under fault and fault-tolerant operation.

关 键 词：五相永磁容错电机 相间短路 相缺失 基波降阶矩阵 

分 类 号：TM351[电气工程—电机]