Abstract
The primary side series-secondary side series (SS) compensation network of a wireless power transfer system has a simple structure. But its output voltage changes with different load resistances. This limits its applications in certain circumstances need a stable output voltage. Aiming at this problem, this paper presents a novel resonant network with output voltage stability when load resistance changes. The resonant network presented in this paper is based on an LCL (inductance-capacitance-inductance) immittance converter, and is improved of the basic SS compensation network. First of all, the operational principle and the frequency characteristics of the LCL-SS resonant network are discussed. Then, output characteristics of the LCL-SS and the SS compensation network are analyzed in a simulation model, and the simulation results illustrate the advantages of the proposed resonant converter. At last, an experimental prototype, delivering 254W power to a resistive load at the distance of 15cm, is constructed based on this resonant converter. The theoretical analysis and the feasibility of the proposed method are verified by the experimental results.
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