As a wheel traction motor used for electric vehicles (EVs), due to the requirement of high power/torque density and the poor working condition, it is more prone to cause severe inter-turn short circuit (ITSC) faults. In this paper, the ITSC faults characteristics of a permanent magnet synchronous machine (PMSM) used for wheel traction motors in EVs are deeply and comprehensively researched. The influence of fault intensity on machine’s parameters and performance are researched at different fault resistances through finite element method (FEM). Besides, factors that affect the amplitude of short circuit current are researched by mathematic formula and simulation, including load state, rotation speed, fault position and branch inductance. Then, the loss and thermal characteristics of the PMSM under different conditions are analyzed. In the last, experiments are conducted to validate the simulation results.

中文翻译：

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电动汽车用永磁同步电机匝间短路故障综合评价

作为用于电动汽车（EV）的车轮牵引电机，由于对功率/扭矩密度的要求较高，工作条件较差，更容易引起严重的匝间短路（ITSC）故障。本文对电动汽车车轮牵引电机用永磁同步电机 (PMSM) 的 ITSC 故障特性进行了深入而全面的研究。通过有限元法(FEM)研究了不同故障电阻下故障强度对机器参数和性能的影响。此外，通过数学公式和仿真研究了影响短路电流幅值的因素，包括负载状态、转速、故障位置和支路电感。然后，分析了不同条件下永磁同步电机的损耗和热特性。在最后，