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

    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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