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Impact of the Transformer Magnetizing Inductance on the Performance of the Dual-Active Bridge Converter

Conference ·
 [1];  [1];  [1];  [1];  [2]
  1. ORNL
  2. Georgia Institute of Technology, Atlanta
+ Show Author Affiliations
The magnetizing inductance of the high-frequency transformer in the dual-active bridge (DAB) converter is usually assumed to be much larger than its leakage inductance, thereby the magnetizing current can be negligible. However, ignoring the magnetizing current will lead to an error in the DAB converter design process. This paper analyzes the operation and performance of the DAB converter for a general case in which the transformer magnetizing inductance is taken into consideration. The analysis shows that the magnetizing inductance impacts the soft-switching region, the power transfer capability, and the leakage inductor current. A simulation case study is provided to verify the analysis. A DAB converter prototype is built to experimentally validate the analysis as well.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1855667
Country of Publication:
United States
Language:
English

References (7)

Extending the ZVS operating range of dual active bridge high-power DC-DC converters conference June 2006
Comparison of Simulation of Dual-Active Bridge in Different Simulators and Using Different Simulation Methods conference November 2021
Unified Boundary Trapezoidal Modulation Control Utilizing Fixed Duty Cycle Compensation and Magnetizing Current Design for Dual Active Bridge DC–DC Converter journal March 2017
Performance characterization of a high-power dual active bridge DC-to-DC converter journal January 1992
Dynamic Control and Performance of a Dual-Active-Bridge DC–DC Converter journal September 2018
A three-phase soft-switched high-power-density DC/DC converter for high-power applications journal January 1991
Maintaining Continuous ZVS Operation of a Dual Active Bridge by Reduced Coupling Transformers journal December 2018

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