Design of Edge-Enhanced Coil Structure to Obtain Constant Mutual Inductance With Horizontal Misalignment in Wireless Power Transfer Systems of Electric Vehicles

I. IntroductIonW IRELESS power transfer (WPT) technology is receiv- ing increasing attention because of the convenience and safety of this technology [1]-[3].This technology is widely used in electric vehicles (EVs) [4], automatic guided vehicles (AGVs) [5], [6], underwater vehicles (UVs) [7], [8], and drones [9], [10].The advantage of WPT technology is that EVs can be charged while on the road using a dynamic WPT system, eliminating the need for batteries.