Robust Sliding Mode Control of On-Board Electric Vehicle Charger

This study introduces a robust outer-loop sliding mode control (SMC) approach for boost-type totem-pole power factor correction (PFC) rectifiers, utilizing singular perturbation theory to improve dynamic performance. Traditional control methods for boost converters often struggle with nonminimum phase behavior, leading to slow response, overshoot, and potential instability in voltage regulation. The proposed terminal (TSMC) effectively addresses these non-minimum phase issues, ensuring fast and stable dclink voltage control, zero steady-state error, and resilience to parametric uncertainties. A super-twisting algorithm is incorporated to minimize chattering while maintaining smooth control action. The control framework ensures accurate voltage tracking in the outer loop, seamlessly coordinating with the inner current loop to achieve high power quality and low total harmonic distortion (THD). Simulation and experimental results on a totem-pole PFC prototype validate the approach, demonstrating rapid transient response, negligible overshoot, and effective mitigation of non-minimum phase effects, making it suitable for high-performance grid-connected PFC rectifiers in electric vehicle (EV) charging systems.