Novel Actively Tuned Resonant Filter Based Buck Converter Using Tunable Capacitor

Ben Guo, Suman Dwari, Shashank Priya, Khai Ngo, Rolando Burgos, Craig Nies

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

Abstract

In power electronic converters, resonant filters can be significantly smaller compared to the conventional low-pass filters. Such improvement is achieved due to the high attenuation offered by the resonant filter at the Pulse Width Modulation (PWM) frequency or switching frequency of the power converter. However in traditional resonant filters, due to the variation of filter component values under dynamic operating conditions, the high attenuation at the switching frequency cannot be maintained. In prior research, Tuned Resonant Filter (TRF) based on tunable capacitor has been introduced to address this problem. Tunable capacitor is intended to compensate the variations of the filter components. In this work, a novel control scheme for resonant filters with tunable capacitor is proposed that can automatically tune the capacitor value to achieve the desired filter performances under varying operating conditions. The proposed control scheme is realized through combination of tank voltage sensing, feedback, PI controller and driver circuits that can regulate capacitor bias voltage such that the effective impedance of the resonant filter is tuned to achieve the intended filtering operation. Analysis, design, and implementation of the proposed control scheme in a synchronous buck converter are presented to demonstrate an efficient circuit implementation. Experimental results are presented to validate the hypothesis that the proposed controller can successfully provide automatic tuning of the resonant filter under changing operating conditions and maintain the desired filter performance.

Original languageEnglish (US)
Title of host publication2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages149-154
Number of pages6
ISBN (Electronic)9781479973118
DOIs
Publication statusPublished - Dec 3 2018
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: Sep 23 2018Sep 27 2018

Publication series

Name2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Other

Other10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
CountryUnited States
CityPortland
Period9/23/189/27/18

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management

Cite this

Guo, B., Dwari, S., Priya, S., Ngo, K., Burgos, R., & Nies, C. (2018). Novel Actively Tuned Resonant Filter Based Buck Converter Using Tunable Capacitor. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 149-154). [8558002] (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8558002