CONSTANT CURRENT CHARGING WITH LCC-P COMPENSATION AND MUTUAL COUPLING ESTIMATION IN DYNAMIC WIRELESS CHARGING FOR EVS

Abstract

This study presents a constant current charging method for dynamic wireless charging (DWC)  systems, incorporating an LCC-P compensation topology and a mutual coupling estimation technique between the transmitting and receiving coils. The charging current is precisely regulated through the control of the DC/AC converter on the transmitting side, while system efficiency across the entire load range is systematically analyzed. A DWC system has been designed, consisting of two main parts: the transmitting side and the receiving side. The transmitting side comprises a charging lane with adjacent transmitting coils integrated beneath the road surface, connected to a high-frequency inverter system via a transmitting-side compensation circuit. The receiving side includes a receiving coil, a receiving-side compensation circuit, and a rectifier, all of which are integrated into the vehicle. Simulation results indicate that the proposed estimation and control method achieves high accuracy, with an estimation error of less than 2%, while maintaining an efficiency exceeding 90% across the entire load range.