基于多场耦合的电机暂态温度场研究

doi:10.16180/j.cnki.issn1007-7820.2020.05.003

Abstract

Abstract:

To solve the transient calculation of temperature field problem caused by unstable heating of the motor under complex working conditions, a two-dimensional coupling model of electromagnetic field and temperature field was established according to the law of unstable heat. Based on the structural characteristics of small type asynchronous motor, the structural parameters, boundary condition parameters, electrical and thermal physical parameters calculation, equivalent and configuration of the electromagnetic field-thermal field two-dimensional model were performed. According to the law of heating variation under complex working conditions, the coupling frequency and heat source coupling mode were designed, and the relevant parameters were calculated and configured. The transient temperature field calculation of the motor under unstable load was realized, and the actual maximum temperature distribution of each part of the motor was investigated. The temperature rise experiment was carried out through the scheme design and construction of the experimental platform. The simulation and experimental results of the transient temperature field of the motor showed that the rationality of parameters equivalence of the two-dimensional model and multi-field coupling method could accurately calculate the full transient temperature field of the motor under complex conditions.

Key words: complex working condition, two-dimensional model, unstable load, transient temperature field, parameters equivalence, multi-field coupling

CLC Number:

TP391.9

SONG He,WU Yaohui,WU Haozhen. Research on Transient Temperature Field of Motor Based on Multifield Coupling[J].Electronic Science and Technology, 2020, 33(5): 15-20.

Figures/Tables 12

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参数名称	参考值	参数名称	参数值
额定功率/W	100	气隙长度/mm	0.18
额定电压/V	220	定子槽数	24
额定电流/A	0.5	转子槽数	30
额定转速/r·min^-1	1 420	定子外径/mm	120
铁心长度/mm	50	定子内径/mm	71.16

负载/Nom	时间/min	求解模型	时间	步长
额定负载	5	电磁场	420 ms	1 ms
1.3倍负载	5	温度场	176 min	1 min
1.5倍负载	1	耦合模型	176 min	5 min

参数	数值
时间/min	44	88	132	176
转子/℃	56.2	66.7	72.3	75.9
槽内下/℃	52.3	62.2	67.7	71.1
槽内中/℃	53.5	63.5	69.0	72.5
槽中顶/℃	53.0	62.9	68.4	71.9
端齿顶℃	51.6	61.6	66.9	70.4
轭外中/℃	50.2	59.9	65.1	68.5
外壳/℃	48.7	57.9	62.9	66.2

参数	数值
时间/min	44.0	88.0	132.0	176.0
转子/℃	55.8	65.7	72.3	75.3
槽内下/℃	51.4	62.1	67.8	71.0
槽内中/℃	52.5	63.4	69.4	72.3
槽中顶/℃	52.0	62.8	68.4	71.8
端齿顶℃	50.7	61.3	66.9	70.3
轭外中/℃	49.0	59.5	65.0	68.3
外壳/℃	46.9	56.8	62.1	64.9

Research on Transient Temperature Field of Motor Based on Multifield Coupling

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