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access icon free Design and performance evaluation of a bidirectional isolated dc–dc converter with extended dual-phase-shift scheme

  • Author(s): Huiqing Wen 1 ; Bin Su 2 ; Weidong Xiao 3
    • View affiliations
    • Affiliations: 1: Department of Electrical and Electronic Engineering, Xi'an Jiaotong-Liverpool University, Suzhou215123, People's Republic of China;
      2: Hangzhou Electric Power Bureau, State Grid Corporation of China, Hangzhou310012, People's Republic of China;
      3: Electrical Power Engineering Program, Masdar Institute of Science and Technology, Abu Dhabi, UAE
  • Source: Volume 6, Issue 5, May 2013, p. 914 – 924
    DOI:  10.1049/iet-pel.2012.0545 , Print ISSN 1755-4535, Online ISSN 1755-4543
© The Institution of Engineering and Technology
Received 01/10/2012, Accepted 16/02/2013, Revised 31/01/2013, Published

This study describes the design and performance evaluation of a bidirectional isolated dc–dc converter with an extended dual-phase-shift (EDPS) scheme. The operation principle and equivalent circuits with consideration of the deadband are presented. The deadband effect with EDPS is different from the conventional phase-shift (CPS) scheme, and the corresponding compensation coefficient is determined. Different operation modes are identified with respect to phase-shift angles of EDPS and load conditions. The safe operational area is also analysed with the comparison of different operation modes. The output voltage and output power characteristics with open-loop or closed-loop operation are discussed. The average theoretical 48.5% reduction in the output voltage ripple using EDPS has been achieved. The average reduction in inductor peak and rms with EDPS are statistically calculated as 37.8 and 26.8%. The measured efficiency has improved from 68.1% using CPS to 81.9% using EDPS for low-power application.

Inspec keywords: low-power electronics; DC-DC power convertors; equivalent circuits; compensation

Other keywords: equivalent circuits; extended dual-phase-shift scheme; output power characteristics; load conditions; safe operational area; output voltage ripple; CPS scheme; phase-shift angles; closed-loop operation; bidirectional isolated dc-dc converter; compensation coefficient; EDPS scheme; open-loop operation

Subjects: Power electronics, supply and supervisory circuits

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