Abstract

Dynamic wireless power transfer can reduce the battery capacity of charged devices. This paper proposes a dynamic capacitive power transfer (CPT) system with a compact receiver structure and a reduced transmitter cost. Compared with the conventional solution, the specially designed coupler can reduce the transmitter copper usage by 50% while still achieving stable output. A series compensation with a compensating inductor is adopted on the transmitter side and there is no compensation on the receiver side to minimize the element count and size, especially on the receiver side. Design procedures of the coupler and the compensation network are provided. The mathematical model of the dynamic CPT system is established. Simulation results have verified the effectiveness of the proposed method.

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