Abstract：In electric field coupled power transfer system, the passive resonant components often bear a large voltage due to its small coupling capacitance and high operating frequency. Especially at the system maximum power point, high-level voltage may break down components, causing system detuning and even causing safety problems. In order to overcome this problem, this paper presents a method to optimize the voltage of passive resonant elements. This method, according to the CLLC-L topology, achieves the optimized voltage of the passive resonant elements by reasonably configuring the parameters of the passive resonant elements. Based on the proposed method, this paper designs a capacitive power transmission system with transmission distance of 150mm and equivalent coupling capacitance of only 13pF. When the transmitting power reaches 2.12kW, the DC-DC system efficiency is up to 89%. The coincidence between the experimental voltage and the calculated voltage shows that the voltage optimization method can effectively lower the voltage stress of the passive resonant elements, which improves the safety margin of the system.
陈阳琦, 陈丽华, 罗博, 胡杰, 麦瑞坤. 一种电场耦合式无线电能传输系统无源谐振元件电压优化方法[J]. 电工技术学报, 2018, 33(10): 2237-2244.
Chen Yangqi, Chen Lihua, Luo Bo, Hu Jie, Mai Ruikun. Voltage Optimization Method of Passive Resonant Elements in Electric Field Coupled Power Transmission System. Transactions of China Electrotechnical Society, 2018, 33(10): 2237-2244.
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2018, Vol. 33 
