Analysis of a CLL Resonant Converter with Semi-Bridgeless Active Rectifier and Hybrid Control

Erdem Asa, Kerim Colak, Dariusz Czarkowski

Research output: Contribution to journalArticlepeer-review


A novel CLL resonant converter with a semi-bridgeless active rectifier (S-BAR) is analyzed, and its hybrid control strategy is proposed in this paper. This topology is developed by replacing rectifier lower diodes with synchronous switches and regulation by a phase-shifted pulsewidth-modulation signal. Theoretical and simulation results show that the performance of the proposed S-BAR is appropriate for resonant converters and secondary-side controlled infrastructure requiring a wide voltage range control at the secondary side. The hybrid control algorithm is obtained with the phase-shift and frequency tuning considering the voltage at the load terminal. High efficiency can be maintained by this proposed control, reducing conduction losses and providing zero-voltage switching soft-switching condition with a wide output voltage range. To confirm the performance of the proposed converter, experimental results are provided for which the output voltage/current range from 0 to 80 V/0 to 8.75 A with an input of 120 V and an average efficiency value of 93%.

Original languageEnglish (US)
Article number7131532
Pages (from-to)6877-6886
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number11
StatePublished - Nov 1 2015


  • CLL converter
  • Frequency
  • hybrid
  • phase-shift
  • resonant
  • semi-bridgeless active rectifier

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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