Fault Tolerant Strategy of Four-Leg for Permanent Magnet Synchronous Motor in Case of Open Circuit Fault
Meng Yunping1, 2, Zhou Xinxiu1, 2, Li Hong1, 2, Cui Yebing3
1. Science and Technology on Inertial Laboratory Beihang University Beijing 100191 China; 2. Fundamental Science on Novel Inertial Instrument & Navigation System Technology Laboratory Beihang University Beijing 100191 China; 3.Shanghai Aerospace Control Technology Research Institute Shanghai 201109 China
Abstract：This paper proposes a fault tolerant strategy based on four-leg voltage source inverter for the permanent magnet synchronous motor (PMSM) drives system to ensure safe and reliable operation in case of single-phase open circuit. Firstly, due to the relationship of the current and voltage of non-fault phase, the mathematical model of the three-phase four-leg topology is established, and the compensation current of non-fault phase is derived. Then, using the equivalent relationship between the phase compensation current and the zero-axis current, the zero-axis current reference control amount is calculated. Furthermore, in order to overcome the shortcomings of the traditional zero-axis voltage compensation strategy and improve the zero-axis current tracking performance, the design of the zero-axis current closed-loop internal model controller (IMC) based on the desired dynamic and static characteristics, so as to achieve high-precision zero-axis current tracking control. Finally, the simulation and experimental results show that compared with the traditional feedforward zero-axis voltage compensation strategy, the proposed fault tolerant strategy based on four-leg topology has better steady-state characteristics.
孟云平, 周新秀, 李红, 崔业兵. 基于四桥臂拓扑的永磁同步电机断相容错控制策略[J]. 电工技术学报, 2019, 34(15): 3158-3166.
Meng Yunping, Zhou Xinxiu, Li Hong, Cui Yebing. Fault Tolerant Strategy of Four-Leg for Permanent Magnet Synchronous Motor in Case of Open Circuit Fault. Transactions of China Electrotechnical Society, 2019, 34(15): 3158-3166.
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2019, Vol. 34 
