Optimizing Grid-to- Vehicle Wireless Power Transfer with a Single-Phase Matrix Converter

This paper presents an improved Grid-to-Vehicle (G2V) Wireless Power Transfer (WPT) system utilizing a Single-Phase Matrix Converter (SPMC) circuit topology. The proposed topology employs a single-stage converter for direct AC to AC conversion at the transmitting coil, significantly reducing circuit complexity and power semiconductor losses. The SPMC is used to convert the input supply voltage from 50 Hz to 20 kHz, aligning with the switching frequency required for WPT functionality. This approach enables high-frequency AC-AC conversion and facilitates bidirectional power flow. At the receiver coil, an AC to DC converter rectifies the high-frequency voltage into DC form. The primary goal of this project is to enhance the circuit topology of electric vehicle charging infrastructure by replacing traditional multistage AC-DC-AC converters with an SPMC circuit. This minimal circuit topology reduces energy losses associated with multistage conversion processes and maximizes power transfer capabilities. The project encompasses theoretical analysis of voltage and current waveforms, and simulations using MATLAB/Simulink to evaluate the performance, feasibility, and reliability of the proposed G2V WPT system using an SPMC. Selected results are presented to verify the operation and effectiveness of the proposed circuit topology.