In this paper, a method is proposed to detect and identify the types of rotor faults in single stator single rotor axial flux permanent magnet synchronous motors, due to manufacturing and assembly errors. Three types of faults are considered: A shift in the rotor geometry along the axial direction, a parallel shift of the rotor geometry axis with respect to the stator axis, and inclined rotor. The proposed method is based on using the motor voltages $(V_d$ and $V_q)$, extracted from the controller, as features for detecting the type of the faults and estimating it's severity. The change of the point $(V_d,V_q)$ in the $V_d$–$V_q$ plane is used as a fault indicator. The shift direction is used to detect the fault's type, and the amount of the shift is used to estimate the severity. A quasi-3D computation is used to model the axial flux motor under healthy operation and the three types of faults. A three dimensional (3D) Finite Element Analysis and experimental tests are performed on a 6 slots, 8 poles axial flux motor to validate the quasi-3D computation. Finally, an algorithm is proposed to detect and discriminate between the different faults under different operating conditions.

中文翻译：

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轴向磁通永磁同步电机由于制造和装配缺陷引起的转子故障的检测和识别

在本文中，提出了一种方法来检测和识别单定子单转子轴向磁通永磁同步电机中由于制造和装配错误引起的转子故障类型。考虑了三种类型的故障：转子几何沿轴向的偏移、转子几何轴相对于定子轴的平行偏移以及转子倾斜。所提出的方法是基于使用电机电压$(V_d$ 和 $V_q)$，从控制器中提取，作为检测故障类型和估计其严重性的特征。点的变化$(V_d,V_q)$ 在里面 $V_d$——$V_q$平面用作故障指示器。偏移方向用于检测故障类型，偏移量用于估计严重性。准 3D 计算用于对健康运行和三种故障类型的轴向磁通电机进行建模。在 6 槽 8 极轴向磁通电机上进行了三维 (3D) 有限元分析和实验测试，以验证准 3D 计算。最后，提出了一种算法来检测和区分不同运行条件下的不同故障。