Voltage-controlled tunable capacitor based resonant power converter

Ben Guo, Suman Dwari, Shashank Priya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


The conventional resonant converters are based on fixed passive components which are required to be operated by variable switching frequency control with limited regulation capabilities under changing operating conditions. This includes the variations of load, source, and components. The variable switching frequency operation not only increases the size of the EMI and the harmonic filters but also reduces the efficiency of a converter. To address these challenges, a fixed frequency resonant power converter based on voltage-controlled tunable capacitor is proposed in this work. In the proposed converter, the capacitance of the resonant tank is varied to control the gain of the resonant converter by changing the dc control voltage across a tunable capacitor bank. Detailed analysis and design of the proposed converter, utilizing LLC resonant tank structure, for achieving high efficiency and fixed frequency operation are presented. Experimental results are presented to validate the operation and high performances of the proposed resonant converter.

Original languageEnglish (US)
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781728103952
StatePublished - Sep 2019
Externally publishedYes
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019


Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States

Bibliographical note

Funding Information:
This research was developed with funding from the Defense Advanced Research Projects Agency (DARPA). The views, opinions, and/or findings expressed are those of the author(s) and should not be interpreted as representing the official views or policies of the Department of Defense or the U.S. Government, United Technologies Research Center, Virginia Polytechnic Institute and State University, and AVX Corporation.

Funding Information:
This work is funded by DARPA FAIN: W911NF-16-2-0010.

Publisher Copyright:
© 2019 IEEE.


  • Active tuning
  • Resonant power converter
  • Tunable capacitor
  • Tunable resonant converter


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