Load-Independent Voltage Control for Multiple-Receiver Inductive Power Transfer Systems

This paper proposes a multiple-receiver inductive power transfer platformwhich is capable of controlling the load voltages to satisfy individually rated values andstabilizing the load voltages against the load variations.In the proposed charging platform, multiple transmitting resonators are employed to supporta voltage-driven source resonator in manipulating the energy flows toward individual receivers.This structure also helps the voltage source induce constant currents into the transmittingresonators, and therefore, is able to deliver load-independent voltages to the loads.As a result, when the loads are sufficiently large, the load voltage ratio is approximatelydetermined only by the mutual couplings of the coils.This means that the voltage control can be performed by effortlessly adjustingthe arrangement of the transmitting resonators inside the charging platform.EM simulation and experiment results verify effectiveness of the proposed system.