Variable Step-Size Switching Frequency Modulation For Synchronous Buck Converter

Keywords

Adaptive switching frequency; DC-DC power converter; Efficiency; Power loss model; Variable step-size

Abstract

A variable step-size switching frequency selection algorithm with fast convergence performance for power converters is presented in this paper. The algorithm can automatically track and detect the optimal switching frequency for a DC-DC converter in order to achieve the highest possible power conversion efficiency. This technique is theoretically analyzed and developed based on synchronous buck converter loss model and its behaviors. A digital control system is designed to apply the selected optimal switching frequency to modulate the PWM duty cycle accordingly. An experimental prototype is built to verify the proposed algorithm and validate the theoretical efficiency improvement.

Publication Date

12-26-2018

Publication Title

Proceedings: IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society

Number of Pages

1562-1567

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/IECON.2018.8591846

Socpus ID

85061527914 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85061527914

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