A Unipolar Coil-Based Multi-Load Inductive Power Transfer System with Decoupling Compensation Design

An inductive power transfer(IPT) system that can power multiple loads simultaneously is proposed in this paper. The reaper unit consisting of one receiving coil and one transmitting coil is used. Each repeater unit corresponds to one load. Thus, power can be transmitted from one unit to the next except for powering the local load connected to the repeater unit. Different from the previous publications, the unipolar coil rather than the bipolar coil is adopted in this design. In order to eliminate the magnetic coupling effect between the two coils in the same repeater unit, a full capacitance compensation network is designed. Moreover, constant load currents can be obtained in the proposed multi-load IPT system. Thus, load power can be controlled flexibly without affecting each other. Simulation results are provided to validate the effectiveness of the proposed design.