摘要
为了提高电力推进系统的可靠性,提出了带冗余特性三相永磁容错电机驱动系统的拓扑结构。为了研究绕组短路故障和逆变器开关短路故障对该驱动系统输出电磁转矩特性的影响,本文在分析两种短路故障等效电路的基础上,建立了短路电流和阻碍转矩的数学模型,通过仿真揭示了逆变器开关短路故障对驱动系统输出转矩特性的影响比绕组短路故障更严重的结论,并给出通过控制逆变器的开关状态将开关短路故障转化为绕组短路故障的实现方法。针对短路故障降低驱动系统平均输出电磁转矩和增大转矩脉动的问题,提出了基于稳态数学模型的最佳电流故障控制策略。仿真和实验结果验证了所提出的故障控制策略的有效性。
In order to increase the reliability, a three-phase fault-tolerant permanent magnet （FTPM） motor drive with redundancy was proposed. In order to study the effect of winding and switch short-circuit faults on output torque feature of this motor drive, the mathematical models of short-circuit and drag torque were built based on the analysis of the equivalent circuits in two faulty conditions. The conclusion that the switch short-circuit fault in inverters has more negative effect on output torque feature than the winding short-circuit fault was revealed through simulation. Then the realization method to transfer the switch short-circuit fault into winding short-circuit fault was provided. Since the average output torque was reduced and the torque ripple was increased due to the short-circuit fault, an optimal current fault control strategy based on the steady mathematical models was proposed. Both simulation and experimental results validate the effectiveness of the proposed fault control strategy.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第3期80-86,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51077007)
辽宁省科学技术计划(2011224004)资助项目
关键词
永磁电机
容错
冗余
短路故障
故障控制策略
Permanent magnet motor, fault-tolerant, redundancy, short-circuit fault, fault control strategy
