A Proposal for a New Generation Power Converter With Pseudo-Derivative Control

摘要

This paper describes the development of a new generation of dc converter used to supply power to telecommunications equipment. Traditional topologies have been single-phase two-stage designs. As a consequence of having a two-stage design there are losses across both stages, resulting in a cascading effect. A new type of converter is proposed that utilizes a three-phase single-stage design and as a result, has efficiency advantages over the traditional approach. Output regulation is normally achieved by means of a PI feedback control. However, under conditions of a step load change there is considerable overshoot. A control technique, known as pseudo-derivative feedback control (PDF) is introduced, and simulation results show an improved response to a step load change.