Electromagnetic Design and Temperature Field Analysis of a High Speed Claw Motor with Outer Permanent Magnetic Rotor

doi:10.11985/2015.09.001

Abstract

Abstract:

High speed permanent magnet motor can connect with the load without any medium and get rid of conventional speed-up gear boxes. Hence, the motor is more extensive used in industrial manufacturing and aerospace equipments recently. Inner punch rotor is widely adopted in conventional high speed permanent magnet motor, and in order to diminish pull stress of permanent magnet, a protection method is often used, which makes permanent magnet volume big, air-gap flux small and eddy-current loss great. But outer rotor high speed permanent magnet motor could avoid the problem. Based on a 3kW, 20 000r/min outer rotor high speed permanent magnet motor, electromagnetic parameters of the motor is designed in this paper, and finite element simulation is used to verify the rationality of electromagnetic design. Aiming at the great loss destiny and difficulty of heat dissipation, a inside-shaft water cooling system is designed and a 3D temperature field model is set up. Two-phase flow method is used to analyze the temperature distribution of the motor in detail. Finally, a prototype is manufactured and the correctness of this paper theoretical analysis is confirmed by prototype test.

Key words: High speed permanent magnetic motor, electromagnetic design, temperature distribution, finite element method

CLC Number:

TM355

Wang Shuangyi,Zhang Fengge,Liu Guangwei. Electromagnetic Design and Temperature Field Analysis of a High Speed Claw Motor with Outer Permanent Magnetic Rotor[J]. Journal of Electrical Engineering, 2015, 10(9): 1-7.

Figures/Tables 13

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名称	数值	名称	数值/mm
转子外径/mm	100	转子内径/mm	88
气隙长度/mm	2	定子外径/mm	79

名称	数值
额定功率P_N/W	3 000
极对数p	2
功率因数cos φ	0.85
效率η	0.8