Anti-deflection and interoperability study of WPT based on distributed transmitting coils
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Abstract:
The offset in the relative position between the receiver and the transmitter in a radio energy transmission system can significantly impact transmission efficiency. We investigate the full-range offset resistance and the interoperability of the coupling mechanism, and propose a novel many-to-one coupling mode. By utilizing planar distributed transmit unit coil combination and studying the open mode of the distributed transmit coil with various receive coil types, axial offset conditions and rotational offset conditions, the interoperability and wide-range all-directional offset resistance of the receive coil is achieved. To improve the degree of freedom of the distributed transmit coil, a distributed series control logic circuit is proposed, and the resonance parameters of the transmit coil are designed for series connection condition to reduce cross-coupling effect. A search strategy for receiving coil position detection is proposed by combining the magnetic field characteristics of the distributed transmit coil with a pickup voltage detection method based on the LCC-S resonant topology. An experimental setup is constructed with considering axial and rotational offsets in all positions. The maximum efficiency fluctuation of the planar receiving coil is found to be 3.3%, the maximum for the vertical receiving coil is 5.57%, and for the solenoid receiving coil is 4.45%. Experimental results show that the proposed system exhibits good anti-offset characteristics and interoperability, verifying the feasibility and efficiency of the system.
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Supported by Guangxi Power Grid Company Technology Project （040200KK52210009）.
