Title

Analysis And Design Of An Adaptive-Step-Size Digital Controller For Switching Frequency Autotuning

Keywords

Adaptive control; Conduction loss; Digital control; Efficiency; Power converter; Power loss; Step size; Switching loss; Variable frequency

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. © 2009 IEEE.

Publication Date

1-1-2009

Publication Title

IEEE Transactions on Circuits and Systems I: Regular Papers

Volume

56

Issue

12

Number of Pages

2749-2759

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TCSI.2009.2016176

Socpus ID

77952116915 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77952116915

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