Abstract：As the realization link of electromagnetic to thermal conversion, the resonant circuit in electromagnetic thermal energy storage system affects the power and efficiency of the system. In actual working conditions, the high-frequency large current flowing through the heating tube in the resonance circuit will change the inductance of the tube, which will affect the power and efficiency of the system. The resonant circuit in the 50kW electromagnetic thermal energy storage system was taken as the research object. Firstly, the finite element transient field calculation was performed on the solution domain to determine the magnetic coenergy and current variation curve. Secondly, the magnetic coenergy function expansion method was used to describe the flux linkage function accurately. Then the dynamic inductance function of the heating tube in the resonant circuit was obtained. The capacitor was matched to form the resonant circuit based on the fundamental harmonic analysis method, so that the electromagnetic thermal energy storage system could maintain high efficiency operation at the designed power. Finally, the experiment was carried out. The calculated value and the experimental value are compared, the resonant circuit voltage waveform, current waveform and phase are anastomosed, and the dynamic inductance calculation is accurately. This paper has certain reference value for the design and research of resonant circuit of electromagnetic thermal energy storage system.
李岩, 郭昊, 敖前, 井永腾. 电磁热储能系统中谐振电路的机理研究[J]. 电工技术学报, 2020, 35(21): 4439-4447.
Li Yan, Guo Hao, Ao Qian, Jing Yongteng. Research on Mechanism of Resonant Circuit in Electromagnetic Thermal Energy Storage System. Transactions of China Electrotechnical Society, 2020, 35(21): 4439-4447.
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2020, Vol. 35 
