D21.6 - An Improved Current-Fed Power Transmitter Design with CLC Compensation for Dynamic Wireless Electric Vehicle Charging

This paper presents the analysis and design of a current-fed wireless power transmitter with CLC compensation for in-motion charging of electric vehicles (EVs). With the rapid adoption rate of EVs, modernization of future EV charging infrastructure, especially dynamic wireless charging, is receiving great attention. Motivated by the need for efficient, reliable, and cost-effective dynamic wireless power transfer (DWPT) systems, this paper presents analysis and improved design of a current-fed transmitter with CLC compensation. Compared to existing methods, the proposed design offers the advantage of ensuring a specified level of switching harmonic attenuation in the transmitter coil current while maintaining high efficiency and satisfying other circuit requirements. In the proposed design, the transmitter module is paired with a receiver module employing LCC compensation and a passive rectifier. This paper further presents development of a 100 W wireless power transfer prototype to validate the proposed design method. Test results demonstrate full compliance with specified attenuation and gain requirements resulting in successful wireless power transfer.