"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.
Chowdhury, Badrul H.
Corzine, Keith, 1968-
McMillin, Bruce M.
Electrical and Computer Engineering
Ph. D. in Electrical Engineering
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Review of dynamic response improvement approaches in dc-dc power electronic converters.
- Studies on flying capacitor voltage regulation in three-level dc-dc power converters.
- Dynamic response improvement in a buck type converter using capacitor current feed-forward control.
- A novel transient control strategy for dynamic response improvement in buck type converters.
- Dynamic response improvement in a new three-level buck type converter.
- Dynamic response improvement in an H-bridge enhanced buck converter.
- Unified charge balance controller and its applications in buck type converters.
xvi, 147 pages
© 2010 Lisheng Shi, All rights reserved.
Dissertation - Restricted Access
DC-to-DC converters -- Design
Electric current converters -- Stability
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Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu:80/record=b10128494~S5
Shi, Lisheng, "Advanced dynamic response improvement methods for dc-dc power electronic converters" (2010). Doctoral Dissertations. 1.
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