Fault Tolerant Multi-leg Inverter Fed Roadway Wirelessly Powered Charging System

Resonant Inductive Power Transmission (RIPT) is an advanced wireless technology for charging EV batteries, offering a safe and practical solution. RIPT systems require high-power transmission, reliability, durability, and cost-effectiveness to enable highway charging. This study presents a fault-tolerant multi-legged quasi-dynamic wireless charging system, aiming to reduce costs by utilizing individual legs of the inverter for each Transmitter (Tx) coil. In a leg fault, a fast-acting changeover switch redirects the Tx coil to an adjacent leg. Fuses/Circuit Breakers are integrated into each leg for protection during fault conditions, ensuring system safety. Additionally, each Tx coil has a sensor that triggers charging when a Receiver (Rx) coil passes over the charging path, facilitating efficient power transfer. Driving the Tx coil is achieved by configuring each leg of the converter as a half-bridge inverter circuit, enabling effective power transfer and control. In this study, the misalignment effect is not considered. The proposed system is verified using MATLAB simulation and results are analyzed.