A Generalized Fault-Tolerant Control Strategy for Five-Phase PM Motor Drives Considering Star, Pentagon, and Pentacle Connections of Stator Windings
A Generalized Fault-Tolerant Control Strategy for Five-Phase PM Motor Drives Considering Star, Pentagon, and Pentacle Connections of Stator Windings
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DOI：
10.1109/tie.2013.2247011
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发表时间：
2014-01-01
影响因子：
7.7
通讯作者：
Parsa, Leila
中科院分区：
文献类型：
--
作者：
Mohammadpour, Ali;Sadeghi, Siavash;Parsa, Leila
针对五相永磁电机系统的开路故障，提出了一种广义最优容错控制方法。除了传统的星星连接外，所提出的FTC技术还考虑了定子绕组的五边形和五边形连接。分析了电机定子绕组和逆变器开关的开路故障。优化目标是在开路故障条件下产生无纹波的电磁转矩，同时具有最小的欧姆损耗。这是通过一个简单的封闭形式的方程来计算参考最佳电流的所有情况下，其中的查找表被用来表示故障类型的影响。建议的FTC技术很容易扩展到PM机具有较高的相位数。五相永磁电机驱动器的实验结果证明所提出的FTC策略。除了对星星接法的五相电机分析单相和双相故障外，还考虑了五边形和五边形接法的三相故障。
In this paper, a generalized optimal fault-tolerant control (FTC) technique is proposed for open-circuit faults in five-phase permanent-magnet (PM) machine drives. The proposed FTC technique considers pentagon and pentacle connections of stator windings in addition to conventional star connection. Open-circuit faults in stator windings of the machine as well as switches of the inverter are analyzed. The optimization objective is to produce ripple-free electromagnetic torque with minimum ohmic losses under open-circuit fault conditions. This is achieved by a simple closed-form equation to calculate reference optimal currents in all cases where a lookup table is utilized to represent the effect of fault type. The proposed FTC technique is easily extended to PM machines with higher number of phases. Experimental results for a five-phase PM machine drive are provided to demonstrate the proposed FTC strategy. In addition to single and double faults, which are analyzed for five-phase machine with star connection, triple-phase faults are also considered in pentagon and pentacle connections.