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| Intelligent Prediction Method for Thermal Dissipation State of Heatsink in Power Electronic Converter |
| Fu Heping1, Chen Jie1, Qiu Ruichang1, Liu Zhigang2 |
1. School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China;
2. Beijing Rail Transit Electrical Engineering Technology Research Center Beijing 100044 China |
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Abstract In this paper, a steady thermal resistance model and a fluid dynamical model of the heatsink are established to theoretically analyze the mechanism of declining thermal dissipation performance of the heatsink. Secondly, the thermal dissipation state prediction model and scheme based on lumped-parameter model are established. At the same time, the power loss calculation model of the power device is established, which is verified by simulation and experiment. Finally, the change curves of thermal resistance, thermal capacity and thermal time constant of the heatsink under different degrees of fouling are obtained, which provides a new feasible scheme for predicting the thermal dissipation state of the heatsink.
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Received: 07 July 2020
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2021, Vol. 36 
