Calculation of Temperature Rise for Permanent Magnet Hub Motor Under Overload Condition

doi:10.11985/2019.01.002

Abstract

Abstract:

The calculation of internal temperature rise of permanent magnet hub motor under overload condition is very important for the safe operation and service life analysis. Taking a 30 kW permanent magnet hub motor as an example, a method for rapid analysis of ultimate overload capacity based on two-dimensional finite element model is proposed. Then, the three-dimensional finite element models are established to analyze the internal loss distribution of the motor under different load conditions, and the loss is used as heat source to import into the finite element temperature field. Based on natural cooling, the heat dissipation coefficients of each part of motor are calculated. The temperature distribution in permanent magnet hub motor under rated torque is analyzed by steady-state temperature field, and the temperature distribution in permanent magnet hub motor under ultimate overload is analyzed by transient temperature field. The research contents in this paper have certain theoretical reference value for overload capacity analysis and optimization design of heat dissipation structure of motor.

Key words: Permanent magnet hub motor, overload analysis, temperature rise calculation, finite element temperature field

CLC Number:

TM315

CHEN Lei,SUN Yue,FANG Jinlong,BAO Xiaohua. Calculation of Temperature Rise for Permanent Magnet Hub Motor Under Overload Condition[J]. Journal of Electrical Engineering, 2019, 14(1): 9-14.

Figures/Tables 10

References 10

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参数	数值
额定功率/kW	30
额定电压/V	240
额定转速/(r/min)	3000
极数	6
额定转矩/N·m	95.5
定子槽数	36
定子外径/mm	210
定子内径/mm	148
气隙长度/mm	0.6
转子内径/mm	48
铁心长度/mm	185

线圈	额定负载损耗/W	3.5倍额定负载损耗/W
1＃	55.3	526.1
2＃	35.6	338.9
3＃	28.1	300.4
4＃	24.1	256.7
5＃	23.1	219.4
6＃	19.9	189.5

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