Open AccessDesign and performance evaluation of a bidirectional isolated dc–dc converter with extended dual‐phase‐shift scheme
Author(s) -
Wen Huiqing,
Su Bin,
Xiao Weidong
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0545
Subject(s) - ripple , control theory (sociology) , compensation (psychology) , power (physics) , inductor , voltage , materials science , electrical engineering , computer science , engineering , physics , thermodynamics , psychology , control (management) , artificial intelligence , psychoanalysis
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.