Bi-Directional CLLC Converter with Synchronous Rectification for Plug-In Electric Vehicles

Shenli Zou, Jiangheng Lu, Ayan Mallik, Alireza Khaligh

Research output: Contribution to journalArticlepeer-review

112 Scopus citations


This paper presents an innovative technique for synchronous rectification in a bidirectional CLLC converter with an integrated transformer for plug-in electric vehicle applications. To improve efficiency and power density, the integrated transformer is introduced and simulated using finite element analysis. In addition, synchronous rectification is implemented by controlling the turn-on and turn-off timings based on the phase difference between primary gate pulse and secondary resonant current. Furthermore, a simplified closed-loop design is discussed and implemented on a digital signal processor (TMS320F28335). The effectiveness of the control loop is verified through a 3.3 kW proof-of-concept prototype with peak efficiency of 97.5%.

Original languageEnglish (US)
Pages (from-to)998-1005
Number of pages8
JournalIEEE Transactions on Industry Applications
Issue number2
StatePublished - Mar 1 2018
Externally publishedYes


  • Bidirectional converter
  • electric vehicles (EVs)
  • integrated transformer
  • phase control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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