Magnetic Design for Three-Phase Dynamic Wireless Power Transfer with Constant Output Power

This paper details the design of a three-phase transmitter-receiver topology for use in a dynamic wireless power transfer (DWPT) system for heavy-duty electric vehicles. The proposed approach and topology eliminate the power oscillation and voltage/current sharing problems that plague planar three-phase DWPT systems. Multi-objective optimization is employed to maximize magnetic coupling and minimize undesired positive--negative sequence coupling, yielding a Pareto-optimal front that delineates the tradeoff between the two objectives for the proposed topology. Selected designs are simulated for a 200-kW/m DWPT system, verifying the elimination of power oscillation and phase imbalance with minimal impact on magnetic performance.