Control Architecture for Full Bridge LLC Series Resonant Converters Using Output Diode Current

Anuj Maheshwari, Furkan Karakaya, Arijit Banerjee, John S. Donnal

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

Abstract

The controller design for LLC resonant dc-dc converter is challenging due to large number of poles whose locations varies with operating conditions. A controller's ability to reject input disturbance is required to reduce the input filter size and increase power density. Also, high bandwidth of the controller allows for fast transient response. This article proposes a control architecture utilizing the output diode current measurement that essentially reduces the control-to-output transfer function for an LLC resonant converter to a first order and provides a very high degree of input voltage disturbance rejection with a minimal increase in control-loop complexity. A small-signal model for the proposed control variable is derived and loop analysis using Bode plot highlights the advantages of the proposed method. Simulation results are given to show the controller's transient performance. The control architecture is validated using a 150W hardware prototype. Experimental results confirm the proposed method's stability and fast transient response.

Original languageEnglish (US)
Title of host publicationAPEC 2023 - 38th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages749-754
Number of pages6
ISBN (Electronic)9781665475396
DOIs
StatePublished - 2023
Externally publishedYes
Event38th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2023 - Orlando, United States
Duration: Mar 19 2023Mar 23 2023

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2023-March

Conference

Conference38th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2023
Country/TerritoryUnited States
CityOrlando
Period3/19/233/23/23

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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