D27.8 - Coil Design Methodology for SS-WPT Systems

Wireless Power Transfer (WPT) systems have emerged as a promising solution to mitigate range anxiety in electric vehicles (EVs). To achieve high power transfer efficiency and minimize reactive power (VA), the implementation of an appropriate compensation network is essential. Among various compensation topologies, the Series–Series (SS) configuration stands out due to its simplicity, reliability, and load-independent characteristics, making it particularly suitable for EV charging applications. A coil design methodology is proposed for the SS topology that determines the number of turns for both the transmitter (TX) and receiver (RX) coils based on the required output power. This approach eliminates the need for time-consuming ANSYS simulations or complex analytical calculations during the design phase. The proposed method also provides flexibility in selecting key design parameters such as transmission distance, inner-loop diameter, and coil geometry, including wire pitch and width. Consequently, critical parameters such as the number of turns, quality factor, and coupling coefficient can be directly derived using the proposed methodology.