On-the-Fly Topology-Morphing Control-Efficiency Optimization Method for LLC Resonant Converters Operating in Wide Input- and/or Output-Voltage Range

This paper presents a control method for efficiency improvement of the LLC resonant converter operating with a wide input-voltage and/or output-voltage range by means of topology morphing, i.e., changing of power converter's topology to that which is the most optimal for given input-voltage and...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2016-03, Vol.31 (3), p.2596-2608
Main Authors: Jovanovic, Milan M., Irving, Brian T.
Format: Article
Language:English
Subjects:
Control
Converters
Dc/Dc converters
efficiency optimization
Electric currents
Electric power
Inductance
Input output
LLC series resonant converter
Magnetic resonance
Morphing
Optimization
Prototypes
Switches
Topology
topology morphing
Transient analysis
Voltage control
wide range
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Summary:This paper presents a control method for efficiency improvement of the LLC resonant converter operating with a wide input-voltage and/or output-voltage range by means of topology morphing, i.e., changing of power converter's topology to that which is the most optimal for given input-voltage and/or output-voltage conditions. The proposed on-the-fly topology-morphing control maintains a tight regulation of the output during the topology transitions so that topology transitions are made without noticeable output-voltage transients. The performance of the proposed topology morphing method is verified experimentally on an 800-W LLC dc/dc converter prototype designed for a 100-V to 400-V input-voltage range.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2015.2440099