Effects of receiver parameters on the wireless power transfer system via magnetic resonance coupling

The wireless system with four-coil resonators is a popular configuration for mid-range wireless power transfer via magnetic resonance coupling. It has broad range of applications. But it is difficult to make the parameters of receiver ( including receiving coil and load coil) to be consistent with the parameters of transmitter ( including driving coil and transmitting coil) in different application environments. The parameters of receiving coil and load coil have strong impacts on efficiency of the wireless power transfer system. In this work, a comprehensive study on effects of receiver ( including receiving coil and load coil) parameters, such as coils radius, wire radius, number of turns and length of coil, is conducted. Some important observations on the effects of the receiver parameters are drawn based on theoretical studies and PSPICE simulation, which are also verified by experiments. It is shown that the radius of receiver has more significant impacts on the power transfer efficiency than other parameters.