Investigation on Optimal Distance between Transmitter and Receiver Coils in Wireless Power Transfer for Dynamic Charging System

Abstract

The usage of electric vehicles (EVs) has significantly increased because of the worldwide movement toward environmentally friendly transportation. Notwithstanding these advancements, creating a comfortable and effective infrastructure for charging EVs remains a significant obstacle to their broad adoption. To overcome this difficulty, wireless power transfer (WPT) technology—specifically, WPT-DCS—has shown promise. With Wireless Power Transfer (WPT)- Dynamic Charging System (DCS), physical connectors are no longer necessary, and EV batteries may be refilled while on the road. In this paper, the development of an optimal distance for wireless power transfer in a dynamic charging system for electric vehicles is proposed. Research that investigated square and circular spiral coils to solve the challenges of WPT-DCS implementation focused on the effects of spiral geometries' thickness as well as the magnetic flux distribution, coupling factor, the receiver (RX) efficiency, RX power, and mutual inductance between TX (transmitter) and RX. Determining the ideal distance between TX and RX and TX and TX is the main goal for dynamic EV charging systems. This paper also presents the hardware setup that replicates the dynamic charging environment for square and circular spiral coils. The concept of emf generation and its utilization for charging the battery while the vehicle is in motion is presented in this paper.