Analysis and evaluation of input power splitting method between multiple transmitters for maximum wireless power transfer

摘要

This paper presents an evaluation for an input power splitting (IPS) method between multiple wireless power transmitters (MTWPT) system in order to obtain the maximum received power. First, the structure of MTWPT system is reviewed and the theoretical modeling is used to derive the output power relationship. Then, the IPS method is discussed and evaluated. The IPS method is realized by splitting the total constant/fixed input power P_total from the power source between multiple WPT transmitters. The power values P₁ through P_n that are injected into transmitter coil T_x1 through T_xn, respectively, can be unequal. Under different transmission distances (DIS) and misalignment conditions (MIS) between Tx coils and Rx coil, the maximum received/load power by Rx can be achieved with the optimum selection of P₁ through P_n values. An experimental prototype is built in the laboratory to evaluate the IPS method and model.