Design of a novel nonlinear discrete-time control Method for switching converters

摘要

Based on the high frequency and large signal discrete-time model for switching converters, a non- linear discrete-time control method is designed on the principle of dynamic programming. In one switch peri- od the optimal duty ratio is got in accordance with a minimum error of the output voltage, then the duty ra- tio is checked and regulated with the energy function in order to make the global performance best. In this way the complete objective function is obtained. Based on the objective function, the fast and accurate con- trol effect is accomplished.