Electronics: Organic growth

Abstract

This chapter provides basic and advanced skills to control electronic power converters, considering that the control of switching power converters is a vast and interdisciplinary subject. State-space models provide a general and strong basis for dynamic modeling of various systems including switching converters. State-space models are useful to design the needed linear control loops and can also be used to computer simulate the steady state and the dynamic behavior of the switching converter fitted with the designed feedback control loops and subjected to external perturbations. Current-mode control in switching power converters is the simplest form of state feedback. Closed-loop control of resonant converters can be achieved using the outlined approaches if the resonant phases of operation last for small intervals compared to the fundamental period. The first step in the fuzzy controller synthesis procedure is to define the input and output variables of the fuzzy controller. This is done accordingly with the expected function of the controller. There are no general rules to select those variables, although typically the variables chosen are the states of the controlled system, their errors, error variation, and error accumulation.