A Unilateral Compensation Network With Any Constant Current Output in WPT System

The compensation network in the wireless power transfer (WPT) system directly affects the performance of the system and is one of the research focuses in the WPT technology. Considering that the transmitter side and the receiver side are challenging to resonate simultaneously in the existing compensation network, the compensation capacitance of the transmitter side cannot be used in some special applications. Based on the multi-solvability of the transformer T-network model, this paper deduces the principle of unilateral compensation to achieve constant voltage or constant current output. It proposes a series-parallel (/SP) compensation network structure that can realize any stable current output characteristics. The structure obtains different transfer admittance characteristics by compensating and controlling the leakage inductance impedance on the receiver side. The experimental results verify the correctness and feasibility of the theoretical analysis.