Study on transmission characteristics of resonant coupling wireless power transfer system with double receivers

Wireless power transfer system with single transmitter and double receivers are introduced and modeled. By comparing single receiving coil with double receiving coils (each receiver of double receivers is the same parameters as the singleload receiver) when the transmitter is the same one, transmission characteristics of system are analyzed with the method of equivalent mutual inductance circuits. As the requirement of the size of the receiver is not strict, calculated by the Matlab, output power and transmission efficiency of double receivers in the best power receiving position are much higher than that of single-load receiver when the power supply voltage is constant. Finally, contrast experiments are carried out to verify the correctness of theoretical analysis.