Abstract：The heat generated by the coil and the environment temperature will affect the dynamic characteristics of relay electromagnetic mechanism. The ignorance of the temperature impacts will decrease the calculating accuracy of dynamic characteristics. To resolve the issue, an electromagnetic- thermal coupling model was established by finite element method, based on mathematic equations of dynamic characteristics and thermal calculation. Considering the similarity principle, the temperature coefficient of resistance and J-A model, a completed coupling model was built in the paper by the combined simulation of a finite element software and Matlab/Simulink. In this model, the conduct thermal coefficient, coil resistance and the soft-magnetic material's properties are considered. The coupling modeling method was used to analyze the dynamic characteristics of high power dc relay GL200 in different environmental temperatures and repeated short working condition. The experimental results of the coupling model are more reasonable than those without considering the temperature impacts.
杨文英, 郭久威, 王茹, 翟国富. 继电器电磁机构电磁-热耦合模型建立与计算方法[J]. 电工技术学报, 2017, 32(13): 169-177.
Yang Wenying, Guo Jiuwei, Wang Ru, Zhai Guofu. Establishing and Calculating Methods of Electromagnetic-Thermal Coupling Model of Relay’s Electromagnetic Mechanism. Transactions of China Electrotechnical Society, 2017, 32(13): 169-177.
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