Advanced dynamic response improvement methods for dc-dc power electronic converters

<p>"Dc-dc power electronic converters supplying electric power to digital processors, data centers, and telecommunication systems are required to exhibit a fast dynamic response in response to their instantaneous electric load variations. This requirement is becoming more and more stringent as the operating voltage of such loads is continuously reducing. This voltage level reduction has reached a point where conventional control approaches can barely meet the dynamic response demanded by such loads. In order to overcome this issue, several approaches focusing on the dynamic response improvement for dc-dc converters have been proposed in the literature. Unfortunately, most of them have at least one of the disadvantages including less dynamic response improvements, potential instability issues, electromagnetic interference problems, power stage complexity, controller complexity, significant additional cost, and large volume. In this dissertation, new approaches which are relatively simple and affordable have been proposed. The solutions proposed herein utilize different power stage buck type topologies in addition to applying new control schemes during load transients. More specifically, a new three-level flying-capacitor buck dc-dc converter, a new H-bridge enhanced buck topology, an extended buck type topology, and three new transient controllers are introduced. In addition to the proposed new approaches, a comprehensive survey of the existing strategies has been presented. Furthermore, one of the existing methods has been generalized and applied to other buck-type dc-dc configurations. Most of the work presented in this dissertation has been analyzed in theory and then verified via simulation models and experimental hardware. It is demonstrated that the proposed solutions can significantly improve the dynamic response of dc-dc power supplies"--Abstract, page iv.</p>

Name thesis:degree_name

Ph. D. in Electrical Engineering

Grantor

Missouri University of Science and Technology

Year dc:date.available

2016

Author dc:creator

• Shi, Lisheng

• Electrical and Computer Engineering

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/1

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-1003