关键词: 负载线圈, 谐振无线输电, 传输功率, 传输效率

Abstract:

In this paper,a model of the magnetic resonant coupling-based wireless power transfer system with two receivers is constructed. Thus,the expressions of the transfer power and efficiency of the system are deduced. The operation characteristics of the system are analyzed by considering the relative positions of the transmitter and the two receivers,and the corresponding experiments are carried out,thus verifying the correctness of the model and characteristic analyses. It is found that the extreme points of the output power and efficiency of the system with the two receivers placed on the same side of the transmitter are both different from those on the different sides,and that they occur at a resonant frequency on the same side,but not on the different side. The findings provide a theoretical basis for the optimization design of the system.

Key words: receiver, resonant wireless power transfer, transfer power, transfer efficiency