TRANSIENT THERMAL ANALYSIS OF AN INDUCTION ELECTRIC MOTOR
TRANSIENT THERMAL ANALYSIS OF AN INDUCTION ELECTRIC MOTOR
复制标题
感应电动机的瞬态热分析
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Oliveira
中科院分区：
文献类型：
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作者：
C. A. Cezario;M. Verardi;S. S. Borges;J. Silva;A. Antonio;M. Oliveira
本文提出了一种热路模型，以模拟电动机在额定负载下从瞬态工作到稳态运行的行为。所提出的模型允许在电动机的径向方向上的温度分布的计算，从轴内部到电机框架表面。考虑了电机内部的几种热源以及导热和接触热阻。采用传热系数法模拟了电机内部和电机外表面的表面对流换热。在纵向方向上，只考虑电机内部的对流阻力。由于其灵活性和易于实施，AMESim ®软件被用作建模和仿真的平台。在一台37 kW WEG电机上进行了实验，仿真结果与实验结果吻合较好。模拟指出了正确建模内部发热和接触电阻的重要性，以便预测瞬态行为。
This paper presents a thermal circuit model to simulate the behavior of an electric motor during the transient duty leading to steady-state operation under rated load. The proposed model allows the calculation of the temperature distribution in the radial direction of the electric motor, from the shaft inside to the motor frame surface. Several heat sources inside the motoras well as the heat conduction and the thermal contact resistances have been considered. The surface convection heat transfer inside the motor and at its external surfaces is modeled by using heat transfer coefficients. In the longitudinal direction, only the convection resistances inside the motor were considered. Due to its flexibility and ease of implementation, the software AMESim ® was used as the platform for modeling and simulation. The experiments has been carried out with a 37 kW WEG motor, and the simulated results reproduced the experimental behavior properly. The simulation points out the importance for a correct modeling of internal heat generation and contact resistances in order to predict the transient behavior.