笼型转子端环断裂引发电机各场量变化情况的分析

doi:10.16180/j.cnki.issn1007-7820.2021.10.003

Abstract

Abstract:

In view of the problems of broken rotor bar and broken end rings of induction motor, in this study, using the finite element method, a Y160L-6 asynchronous motor is taken as an example to establish the finite element models of the normal motor, the broken aluminum strip and the broken end ring motor. The transient magnetic field calculation is carried out, and the change of stator and rotor current and the change of air gap magnetic density are analyzed. Based on the loss results calculated by the electromagnetic field, the three-dimensional steady-state temperature field distribution of the motor is calculated, and the results show that different faults can cause the temperature distribution of the motor to increase in different degrees. The stress distribution of the rotor is calculated using the calculation result of the temperature field as the load. Different faults lead to different degrees of increase in rotor thermal stress distribution. The fracture of the aluminum bar and the end ring induce a significant change in the stress at the connection between the aluminum bar and the end ring.

Key words: induction motors, loss, broken rotor bar, broken end rings, electromagnetic field, thermal field, thermal stress field, finite element

CLC Number:

TP391

WANG Xinzhang,GUO Qiang,XU Xiaozhuo. The Analysis of Field Changes for Induction Motor with Broken End Rings[J].Electronic Science and Technology, 2021, 34(10): 18-26.

Figures/Tables 14

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参数名称	参数值
额定功率/kW	11
额定电压/V	380
电源频率/Hz	50
定子外径/mm	260
定子内径/mm	180
转子槽数	33
铁芯长度/mm	195
气隙长度/mm	0.4
极数	6

The Analysis of Field Changes for Induction Motor with Broken End Rings

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