Title

Adaptive Digital Controller and Design Considerations for a Variable Switching Frequency Voltage Regulator

Authors

Authors

W. Al-Hoor; J. A. Abu-Qahouq; L. Huang; W. B. Mikhael;I. Batarseh

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

IEEE Trans. Power Electron.

Keywords

Adaptive control; dc-dc converter; digital control; dynamic response; efficiency; limit cycle; variable frequency; DC-DC CONVERTERS; IMPLEMENTATION; ARCHITECTURE; EFFICIENCY; Engineering, Electrical & Electronic

Abstract

An auto-tuning adaptive digital controller with maximum efficiency point tracking to optimize dc-dc converter switching frequency is presented in this paper. The adaptive-frequency-optimization (AFO) controller adjusts the dc-dc converter switching frequency while tracking the converter minimum input power (maximum efficiency) point under variable operation conditions of the power converter. The AFO digital controller continuously finds the optimum switching frequency that will result in minimum total power loss while converter parameters and conditions vary. Moreover, the presented controller addresses the issues that are associated with implementing variable switching frequency in digital controllers, including limit cycle oscillation and possible performance degradation, by using a dynamic algorithm to maintain converter system stability under variable switching frequency operation. In this paper, the proposed controller is discussed, analyzed, and its digital control algorithms and experimental results are presented.

Journal Title

Ieee Transactions on Power Electronics

Volume

24

Issue/Number

11

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

2589

Last Page

2602

WOS Identifier

WOS:000272998800008

ISSN

0885-8993

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