A Load-Independent Multi-Output Wireless Power Transfer System Based on LCC-S Cascaded TResonant Circuit

Abstract

In order to solve the practical application of the need for a wireless power transfer system to provide power to multiple loads, a new topology of constant-current multi-output wireless power transfer system is designed by connecting multiple T-type resonant circuits in parallel at the common port of the receiver by using T-type circuit characteristics. Simulation and analysis of the T-type multi-output wireless power transfer system are carried out and our results show that the proposed T-type resonant constant-current multi-output wireless power transfer system has the following characteristics which read (1) a load-independent constant-current output can be obtained due to the characteristics of the T-resonant circuit, (2) the entire system is purely resistive, which means that the inverter output voltage and output current can achieve zero phase angle (ZPA), (3) the current of the different output channels can be adjusted by configuring the component parameters, and (4) each output channel is independent of each other, when one of the output channels is disturbed, the other output channels are not affected. Our analysis indicates the feasibility and validity of the proposed wireless power transfer system.