Digital deadbeat controller for coupled inductor boost converter

Abstract

In this paper analysis and design of deadbeat current control for the coupled inductor boost dc-dc converter is proposed. With the help of state-space technique, mathematical models are formulated, and then the discrete compensator designed using deadbeat control theory. Salient features of the coupled inductor topology are compared with the conventional boost topology. The compensator design is validated through simulations, when the converter is subjected to disturbances such as source and load fluctuations. For demonstration simulation and experimental results are presented for 12 to 36 V, 30 W, 50 KHz converter system. These studies show that the proposed digital controller resulting better dynamic response together with robust performance for a given range of parameter variation.