Topology Design and Sliding Mode Controller Design for a Novel High Step-Up DC-DC Converter

Abstract

This paper discusses a high voltage gain boost converter with enhanced conversion efficiency. A passive clamped circuit is applied to the switch of quadratic boost converter. A step-up capacitor and resonant inductor is adopted to connected in series with the clamp capacitor through diodes. Those constitute a voltage multiplier cell that can absorb stray energy to clamp capacity, reduce the stresses of switch and diodes, and promote voltage gain. Furthermore, a sliding mode control (SMC) scheme with constant frequency is addressed for this converter. It is shown that the tracking error can converge to the equilibrium point against input voltage disturbance and load variation. Numerical simulations are given to verified the theoretical considerations.