Analysis of Light Load Fast Response LCC Resonant Converter Based on Simplified State Trajectory

Hanwen Long, Deshang Sha, Guangshan Tang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Rapid dynamic response has been a crucial performance metric in the control of LCC resonant converter. In this article, the simplified state trajectory of the LCC resonant converter under light load and heavy load are examined. By analyzing the geometric characteristics of the steady-state trajectories and the charge transfer properties of the resonant tank, deriving the coordinates of various points and the state trajectory equations under various loads becomes a straightforward task. The optimal trajectories under light load are designed, and the time required for trajectory switching is also calculated through the corresponding trajectory equations. Through experimental validation, it has been demonstrated that state variables of resonant tank can smoothly transition to the next steady trajectory within one cycle under light load. The voltage overshoot is reduced by more than 80%, and the settling time has been shortened by 75%. Ultimately, fast dynamic response under light load is achieved.

Original languageEnglish
Title of host publication2024 IEEE 19th Conference on Industrial Electronics and Applications, ICIEA 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350360868
DOIs
Publication statusPublished - 2024
Event19th IEEE Conference on Industrial Electronics and Applications, ICIEA 2024 - Kristiansand, Norway
Duration: 5 Aug 20248 Aug 2024

Publication series

Name2024 IEEE 19th Conference on Industrial Electronics and Applications, ICIEA 2024

Conference

Conference19th IEEE Conference on Industrial Electronics and Applications, ICIEA 2024
Country/TerritoryNorway
CityKristiansand
Period5/08/248/08/24

Keywords

  • LCC converter
  • light load
  • state trajectory

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