Multireference frame based asymmetric six-phase interior permanent magnet motor modeling and control strategy under single open-phase fault are investigated in this article. The motor modeling under healthy operation is firstly established based on a dual dq-axis synchronous rotating frame. With this dual dq-axis frame, the motor modeling considering the magnetic saturation effect under open-phase fault has been derived. By introducing a dual-direction rotating frame, the stator current under single open-phase fault can be treated as the sum of a positive current sequence and a negative current sequence. With this dual-direction rotating frame, the two current sequences can be transformed into two dc components for fault-tolerant operation. Fault-tolerant control schemes with maximum torque per ampere for copper loss minimization and torque maximization are developed, respectively. Finally, the validity of the proposed modeling and control are evaluated by experiments under both steady and transient scenarios.

中文翻译：

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基于多参考系的不对称六相内置永磁电机缺相故障建模与控制


本文研究了基于多参考框架的非对称六相内置式永磁电机建模和单相缺相故障下的控制策略。首先基于双dq轴同步旋转框架建立健康运行下的电机模型。利用该双dq轴框架，推导了考虑缺相故障下磁饱和效应的电机模型。通过引入双向旋转框架，可以将单次缺相故障下的定子电流视为正电流序列和负电流序列之和。通过这种双向旋转框架，两个电流序列可以转换为两个直流分量，以实现容错运行。分别开发了具有每安培最大扭矩的容错控制方案，以实现铜损最小化和扭矩最大化。最后，通过稳态和瞬态场景下的实验评估了所提出的建模和控制的有效性。