Abstract Wireless power transfer (WPT) system with multiple loads employs a single- transmitter-single-receiver magnetic coupling structure and single resonant frequency currently. However, this structure suffers from large circuit volume, high system cost, and poor adaptability to versatile wireless power delivery scenarios. To enhance wireless power transfer in multi-frequency and multi-load power delivery applications, a multi-frequency resonance method with single-transmitter- multiple-receiver magnetic-coupling structure is proposed. And the impact of pulse width modulation (PWM) on the wireless power transfer characteristics is analyzed using an equivalent circuit model of a single-phase full-bridge inverter and series/series (SS) resonant compensation network. On this basis, a multi-frequency pulse width modulation (MFPWM) strategy is designed based on unipolar control, allowing for effective transmission of multiple magnetic coupling resonant frequencies simultaneously. Finally, a system simulation model is implemented using Matlab/Simulink to validate the feasibility and effectiveness of the proposed multi-frequency resonant wireless power transfer method.
LI Jiangnan,LI Ruihua,HU Bo. A single-transmitter-multiple-receiver magnetic coupling multi-frequency resonant wireless power transfer method[J]. Electrical Engineering, 2023, 24(11): 1-9.
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2023, Vol. 24 
