Novel single-sided ferrite-less magnetic coupler for roadway EV charging

Abstract

This paper introduces a new ferrite-less magnetic structure for roadway charging of Electric Vehicles (EVs). Most of the existing magnetic pads for roadside EV charging rely on ferrimagnetic materials to produce single-sided flux and boost power levels while minimizing undesired field emissions and losses. But the properties that roadway pads must have are mechanical robustness coupled with the ability to throw single-sided, high arching flux while being subjected to stringent conditions under asphalt, bitumen, or concrete. Ferrite is very brittle and expensive and its performance under transient forces when buried under a roadway is questionable. This new ferrite-less magnetic coupler is proposed as a primary pad for roadway EV charging. Simulated and experimental results are shown, followed by a discussion on its capabilities, limitations, and possible updates.