A Modular Pad Design compatible with SAE J2954 for Dynamic Inductive Power Transfer

Abstract

Electric vehicle OEMs are utilizing Inductive Power Transfer (IPT) as a solution to charge Electric Vehicles (EVs). Dynamic IPT systems enable in motion charging of EVs hence reducing the range anxiety with operating an EV. Constant power delivery in dynamic IPT systems is a challenge due to the coupling variation between the ground assemblies (GAs) and the vehicle assembly (VA). Typically magnetic coupling decreases when the VA is located between two GAs resulting in reduced power transfer. This paper proposes a new GA geometry to reduce magnetic coupling variations during pad transitions. The proposed GA (Booster Coil) is designed to transfer 10 KW to a SAE J2954 WPT3Z3 VA and 30KW to a newly designed VA, respectively. The Booster coil GA offers modularity and compatibility with SAE J2954 WPt3Z3 VA.