Abstract：Inter-turn short circuit (ITSC) is a common winding fault of the motor, which will cause the increase of stator winding current and local overheating of the motor. If the motor operates under this condition for a long time, the motor performance will decline and cause economic losses. This paper took a 3kW permanent magnet synchronous motor as an example, and studied the influence of ITSC fault on the temperature of each part of the permanent magnet synchronous motor. A three-dimensional equivalent thermal model was established based on the motor parameters, the insulation material was equivalent to insulation layer, the shell was segmented along the axial direction and different boundary conditions were applied to the shell surface according to the wind speed, and the eddy current loss of permanent magnet and heat dissipation of terminal box were considered. The temperature distribution of the motor under normal and ITSC fault conditions was calculated by the finite element method. By rewiring the motor winding, the experimental platform was built, and the temperature at key points of the permanent magnet synchronous motor was measured. The temperature rise data before and after the ITSC fault was compared and analyzed. Then the change trend of the temperature distribution before and after the ITSC fault, and the local overheating position were obtained, which can provide a reference for the diagnosis and prevention of the ITSC fault.
谢颖, 胡圣明, 陈鹏, 马泽新. 永磁同步电机匝间短路故障温度场分析[J]. 电工技术学报, 2022, 37(2): 322-331.
Xie Ying, Hu Shengming, Chen Peng, Ma Zexin. Thermal Field Analysis on Inter-Turn Short Circuit Fault of Permanent Magnet Synchronous Motor. Transactions of China Electrotechnical Society, 2022, 37(2): 322-331.
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