Current Balance Design for Inductive Power Transfer Systems with Secondary Multiple Parallel Branches

Abstract

In inductive power transfer (IPT) systems, the coils with multiple parallel branches can effectively solve the spatial problem caused by the coil thickness. Traditional compensation methods take the multiple parallel branches as a whole and uses a single capacitor to compensate the reactive power. Current unbalance between the multiple parallel branches has not yet been solved. This paper illustrates the reason for the current imbalance, proposes a current balance compensation method, details the compensation parameter design, and experimentally validate the method and design.