Abstract
In this article, an optimal design for mid-range wireless power transfer system based on multiple repeaters is proposed, which aims at powering high-voltage side sense module in HVdc applications. The mathematical model of the system is established. The characteristics of current distribution and impedance angle are analyzed under equally spaced situations. To further optimize the system, the optimized spaced structure with different distances is investigated, which can improve transferring efficiency under same distance requirement. The effect of load is also analyzed. A 1.5 m prototype with eight repeaters is built and the experimental results verify the feasibility of optimized coil arrangement, which can effectively improve efficiency, especially under light load situations.
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