Expansion of Ramp Compensation and Comprehensive Evaluation in Boost Converter

A DC/DC switching converter is a strongly nonlinear control system. The study on chaotic phenomena and chaos control is a hotspot of the power electronics. In this paper the dynamical model of current-mode controlled boost converter has been studied. Based on expansion of ramp compensation method and parametric resonance perturbation method, we used three different perturbation signals (i.e. sine wave, saw tooth wave and triangular wave) to boost converter for controlling chaos, and presented criteria of performance evaluation. Meanwhile, from the evaluation principles introduced, it is indicated that triangular wave is a suitable choice of periodic compensation signal. Simulations and analysis are presented to provide practical and theoretical evidences for the proposed control method.