Hybrid control approach of CLL resonant converter for EV battery chargers

Kerim Colak, Erdem Asa, Mariusz Bojarski, Dariusz Czarkowski

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


In this study, a CLL resonant converter with different control strategies; frequency, dc-link, and phase shift control are compared and a hybrid control is proposed to increase the efficiency of the system for Electric Vehicle (EV) battery charger applications. The comparison analysis is examined considering the battery charging control algorithms constant current (CC) and constant voltage (CV) with modeling the battery as a variable load. In order to improve charging efficiency, the system should operate in a close to resonant frequency, achieving ZVS and reducing circulating current. The presented control is achieved by staying around the resonant frequency in all charging conditions. The designed dc/dc resonant converter, fed by a power-factor-corrector (PFC) with 80-120 V output, provides 120 V / 10 A at 1.2 kW maximum power. The application results show that the proposed hybrid control improves overall efficiency 2 %.

Original languageEnglish (US)
Title of host publicationIECON Proceedings (Industrial Electronics Conference)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781479940325
StatePublished - Feb 24 2014

Publication series

NameIECON Proceedings (Industrial Electronics Conference)


  • Constant current (CC)
  • Constant voltage (CV)
  • Control resonant CLL
  • Converter
  • Dc link
  • Frequency
  • Phase shift

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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