低速大转矩永磁电机的转子散热问题

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Abstract In this paper,the temperature rise was calculated by finite element method with a low speed and high torque permanent magnet motor,and the accuracy of the calculation method was verified by the experiment.The temperature rise of the motor was low,so the design was improved,the length of the iron core was shortened,the torque density was increased,and the material was saved.But in the improved motor,the high temperature of the rotor and permanent magnet(PM)can lead to PM demagnetization.Therefore,this paper has carried out the researching on this problem,the theoretical analysis and the calculation of fluid solid coupling method were used to solve the problem that the heating of the rotor of the improved motor.Firstly,the factors that affect the intensity of convective heat transfer were analyzed,and then the heating problem was solved by the installation of cooling wind thorn and rotor axial/radial ventilation duct.The heat dissipation effect of PM with different size of wind thorn was studied.The heat dissipation effect and temperature rise distribution of PM with the rotor axial/radial ventilation duct was studied.The accuracy of the research and the validity of the method were verified by the experiment.The research on the heat dissipation problem of the rotor has a certain guiding role for the design of the low speed and high torque permanent magnet motor.

Key words： Low speed and high torque permanent magnet machine rotor heat dissipation fluid solid coupling wind thorn ventilation duct

Received: 22 January 2016 Published: 17 April 2017

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TM315

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	Chen Lixiang
	Xie Zhilin
	Wang Xuebin

Cite this article:

Chen Lixiang,Xie Zhilin,Wang Xuebin. The Rotor Heat Dissipation Problem of Low Speed and HighTorque Permanent Magnet Motor[J]. Transactions of China Electrotechnical Society, 2017, 32(7): 40-48.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I7/40

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