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Analysis of the Temperature Field of a High-Speed Permanent Magnet Motor

机译:高速永磁电动机温度场分析

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When the high-speed motor is running, due to its ultra-high speed and the current frequency of thousands of hertz, the loss value of each part will increase greatly. High loss will inevitably lead to high temperature rise. Excessive temperature rise may cause problems such as motor insulation failure, permanent magnet demagnetization, and insufficient mechanical strength. This paper establishes a lumped parameter thermal network model of a 20 kW, 10 Wrpm surface-mount 2 pole 6 slot high speed permanent magnet motor, and conducts a finite element analysis, and analyzes the effect of a cooling method in the stator conductor. The final finite element analysis results show that the copper conductor temperature rise of this high-speed motor is 254.49 °C, and the maximum temperature rise of the motor is 258.71 °C. When the copper conductor has an internal cooling structure and cooling water is passed, the copper conductor temperature rise almost drops to 0 °C, and the maximum temperature rise of the motor has also dropped to 80.27 °C.
机译:当高速电机运行时,由于其超高速和数千赫兹的电流频率,因此每个部分的损耗值将大大增加。高损失将不可避免地导致高温升高。过高的温度升高可能导致电动机绝缘故障,永磁退磁和机械强度不足的问题。本文建立了20千瓦,10个WRPM表面安装2极6槽高速永磁电动机的总体参数热网络模型,并进行有限元分析,并分析冷却方法在定子导体中的效果。最终有限元分析结果表明,该高速电机的铜导体温度升高为254.49°C,电动机的最大温度升高为258.71°C。当铜导体具有内部冷却结构和冷却水时,铜导体温度上升几乎降至0°C,并且电动机的最高温度升高也降至80.27°C。

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