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中文摘要：
高速电动机的损耗密度大,散热困难,因绕组绝缘易过热而出现寿命减短甚至失效的问题,因此准确地计算异步电动机各个损耗以及准确预测电动机温度场变得尤为重要.本文以一台额定转速为40000r/min的高速异步电动机为例,进行了高速异步电动机损耗的全面分析,基于磁-热单向耦合的有限元方法对高速异步电动机的整体温度场进行了准确计算,并与实验结果进行比较.研究表明,可以忽略高速异步电动机的转子铁耗,高速异步电动机在运行超过某一转速后,电动机温升呈指数规律增加,需要对电动机温升进行监测,同时,磁-热耦合的方法具有一定的准确性.
英文摘要：
Due to high loss density, cooling difficulties, high speed asynchronous motors are easy to occur reduction of winding insulation life and even failure. So accurately calculating motor loss and predicting the temperature field are particularly important. In this paper, a high speed asynchronous motor with a rated speed of 40000r/min is designed for studying, and its loss is analyzed wholly. Based on the method of magnetic-heat coupled FEM, the whole temperature field of the motor is calculated accurately, and the results of temperature field are compared with the experimental results. The research has shown that： the rotor＇s iron loss of the high speed asynchronous motor can be ignored, and after the rotor runs above a certain speed, its temperature rises with exponential rule, and temperature monitoring is also needed. Meanwhile, the method of magnetic-heat coupled has a certain accuracy.
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