Robust power factor correction and DC-link regulation of a single-phase PWM boost rectifier for wireless EV charging

Abstract

This paper proposes a robust sliding-mode control (SMC) strategy for a single-phase PWM AC–DC boost rectifier intended for wireless electric vehicle charging systems. The controller is designed to achieve two main objectives: accurate synchronization of the input current with the grid voltage for power-factor correction and stable DC-link voltage regulation under load variations and parameter uncertainties. To improve practical implementation, a continuous approximation of the discontinuous SMC term is introduced to reduce chattering while preserving robustness. The novelty of this work lies in the unified current–voltage SMC formulation, which combines input current shaping for power-factor correction and DC-link voltage regulation within the same control framework for a receiver-side rectifier used in wireless EV charging. The proposed approach is evaluated in MATLAB/Simulink and compared with a conventional PI controller and a hybrid PI + SMC current-loop scheme. Simulation results demonstrate fast voltage dynamics, with a settling time of about 8 ms, effective tracking under variable DC-link reference changes, and improved input power quality. The input current total harmonic distortion (THD) is reduced to 0.73%, while the power factor increases up to 0.999. Under the considered operating conditions, the conversion efficiency reaches 97%.