Frequency Hopping Wireless Power Transfer within the SAE J2954 Operating Frequency Bandwidth - A Concept Design

The proliferation of electric vehicles (EVs) necessitates advancements in wireless power transfer (WPT) technologies to enhance security and efficiency. This paper introduces an enhanced Frequency Hopping Wireless Power Transfer (FHWPT) system designed to operate within the Society of Automotive Engineer's (SAE) J2954 recommended frequency bandwidth (79kHz to 90kHz). The proposed FHWPT system utilizes frequency hopping to secure WPT operations against potential radio frequency interferences and cyber threats. The authors explore various mono resonant compensation circuit topologies and select the Series-Series topology for its simplicity and efficiency. An Impedance Matching Circuit (IMC) is integrated into both the transmitter and receiver circuits, enhancing the system's robustness by detecting misalignments and preventing power theft. Furthermore, the system dynamically selects operating frequencies using a microcontroller to manage interferences effectively, ensuring a resilient charging process. The paper confirms the potential of frequency hopping to improve the security and operational integrity of WPT systems for EVs.