Abstract The traditional capacitive power transfer (CPT) system utilizes single-phase H-bridge inverter and single transmitter to transfer power. Because of the CPT system is limited by the capacity constraints of the inverter, so that it may not be able to meet the high power requirement of rail transit applications. To realize the system’s high power output, dual transmitting and single receiving terminal CPT system is proposed in this paper by paralleling two inverters so that the total capacity of input power is enhanced. The six-plate capacitive coupler model is simplified as three-port circuit, and finite element analysis (FEA) by Maxwell is used to simulate the coupling capacitors. Considering the effect of mutual coupling between two transmitting mechanisms, this paper presents the resonant circuit parameter configuration method. At last, the system’s working principle is analyzed in detail, and an experiment is designed at the working frequency of 500 kHz. The DC-DC efficiency is up to 90.6% when the output power is 1.47 kW. The current flowing through the switching device in the dual transmitters is half of that in the single transmitter with the same power output in the CPT system. The experimental results show that the proposed methods are effective and feasible.
Hu Jie,Chen Lihua,Luo Bo等. Electric Field Coupled Power Transmission System with Dual Transmitting Terminals Based on Full-Capacitive Coupling Model[J]. Transactions of China Electrotechnical Society, 2019, 34(17): 3542-3551.
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2019, Vol. 34 
