Variable Frequency Multiplier Technique for High-Efficiency Conversion Over a Wide Operating Range
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Perreault_Variable frequency.pdf
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2.08 MB
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Author(s)
Afridi, Khurram K.
Inam, Wardah
Perreault, David J
Date Issued
July 2015
Journal
IEEE Journal of Emerging and Selected Topics in Power Electronics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Inam, Wardah, et al. “Variable Frequency Multiplier Technique for High-Efficiency Conversion Over a Wide Operating Range.” IEEE Journal of Emerging and Selected Topics in Power Electronics 4, 2 (June 2016): 335–343 © 2016 Institute of Electrical and Electronics Engineers (IEEE)
Version
Author's final manuscript
Abstract
This paper presents a variable frequency multiplier (VFX) technique that enables the design of converters for wide input and/or output voltage ranges while preserving high efficiency. The technique is applied to an LLC converter to demonstrate its effectiveness for converters having a wide input voltage variation such as universal input power supplies. This technique compresses the effective operating range required of a resonant converter by switching the inverter and/or the rectifier operation between processing energy at a fundamental frequency and one or more harmonic frequencies. The implemented converter operates over an input voltage range of 85-340 V, but the resonant tank and conversion ratio have only been designed for half this range; a VFX mode of the inverter is used to enhance this to the full range. The experimental results from a 50-W converter show an efficiency of 94.9%-96.6% across the entire input voltage range, demonstrating the advantage of using this technique in such applications.
MIT Department
Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1109/jestpe.2015.2461615
