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Adjustable Multi-band and Multi-load Wireless Power Transfer System Based on Frequency Splitting
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  • Nenghong Xia,
  • Jialiang Lin,
  • Yimin Zhu,
  • Fan Zhang,
  • Huaishen Li
Nenghong Xia
Shanghai University of Electric Power

Corresponding Author:[email protected]

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Jialiang Lin
Shanghai University of Electric Power
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Yimin Zhu
Shanghai University of Electric Power
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Fan Zhang
Shanghai University of Electric Power
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Huaishen Li
Shanghai University of Electric Power
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Abstract

In magnetically coupled resonant wireless power transfer system, when two or more coils work under over-coupling, the original resonant frequency will split, thereby reducing the power transfer efficiency. For multi-load systems with different operating frequencies, a packetized multi-frequency wireless charging method based on frequency splitting is proposed. Two adjustment modes, axial and lateral, are designed for the adjustment coil. By adjusting the coupling coefficient, it is possible to switch different groups of loads for charging. The experimental results confirm that the two load coils receive 1.2W and 1.4W of power, respectively, when the proposed system is input with a DC voltage of 10V.