An Optimized Hexagonal Geometry Magnetic Coupler for Floor-Mounted Electric Vehicles Wireless Charging System

Electric Vehicles (EVs) are rapidly gaining popularity as a sustainable mode of transportation. Wireless charging technology is a convenient and efficient way to recharge EVs, and the design of the charging pad plays a crucial role in the efficiency of the charging process. A novel implementation of a Double LCC compensated wireless power transfer (WPT) system with hexagonal coils can provide stable and reliable output under various operational conditions, including load variations and misalignments, for wireless charging systems. The proposed WPT system employs a Double LCC configuration with hexagonal coils to maintain a stable output current despite misalignments and load variations. The stability of the output is achieved by carefully designing the system parameters, particularly the denominator parameter a, which is the sum of two factors aA and aB that exhibit opposite trends under misalignment conditions. Experimental results demonstrate that the system can maintain a stable 13.5A output current with minimal fluctuations when the load varies between 5.2Ω-4.8Ω and the misalignment ranges up to ±120mm in the Y-axis and 60-100mm in the Z-axis. The proposed system with hexagonal coils is more straightforward, easier to implement, and does not require complex control algorithms or additional communication modules.