Analysis and Design of an Adaptive-Step-Size Digital Controller for Switching Frequency Autotuning

    Authors

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

    Comments

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

    Abbreviated Journal Title

    IEEE Trans. Circuits Syst. I-Regul. Pap.

    Keywords

    Adaptive control; conduction loss; digital control; efficiency; power; converter; power loss; step size; switching loss; variable frequency; DC-DC-CONVERTERS; VOLTAGE; IMPLEMENTATION; EFFICIENCY; Engineering, Electrical & Electronic

    Abstract

    An adaptive-step-size autotuning algorithm and controller for power converters' switching frequency optimization with improved convergence performance is presented in this paper. The controller automatically tracks and determines the switching frequency of a power converter in order to achieve the highest power conversion efficiency under variable operating conditions including temperature variation effects, component aging effects, component's manufacturing process differences, input voltage changes and load current changes. The adaptive-step-size function results in improved adaptive controller convergence speed, convergences error and stability. In this paper, the proposed autotuning control loop for a power converter is theoretically analyzed and its design and stability criteria are developed. The developed algorithm operation is verified by experimental results obtained from a proof of concept prototype.

    Journal Title

    Ieee Transactions on Circuits and Systems I-Regular Papers

    Volume

    56

    Issue/Number

    12

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    2749

    Last Page

    2759

    WOS Identifier

    WOS:000273568400005

    ISSN

    1549-8328

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