Robust Dynamic Control of Constant‐Current‐Source‐Based Dual‐Active‐Bridge DC/DC Converter Used for Off‐Board EV Charging

Muhammad Husnain Ashfaq, Zulfiqar Ali Memon, Muhammad Akmal Chaudhary, Muhammad Talha, Jeyraj Selvaraj*, Nasrudin Abd Rahim, Muhammad Hussain*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
54 Downloads (Pure)

Abstract

Due to the high-power density, inherent zero‐voltage‐switching (ZVS), and high voltage conversation ratio, the current source‐based isolated dual‐active‐bridge DAB–DC/DC converters are extensively used for charging EVs under constant‐current mode. However, the fast dynamic response of an output current is a crucial requirement for dual‐active‐bridge DC/DC converters operating as a constant‐current source. This study proposes a fast current controller (FCC) for tracking the desired output current under various input/output parameter disturbances/variations. The proposed control strategy can ensure a fast transient response with negligible overshoot/undershoot for output current during start‐up and when there are variations in the load or input voltage. Furthermore, the dynamic behavior of the current control against change in the reference current value has also been improved. A constant‐current‐based DAB–DC/DC converter is modeled and simulated in MATLAB/Simulink software and a scaled‐down 300 W lab prototype DAB–DC/DC converter is designed with the TMS320F28335 DSP controller of Texas Instruments. To verify the effectiveness of the proposed current controller, different test cases, such as a change in the load, a change in the input voltage, and a change in the desired output current, are considered. Moreover, under these test cases, the proposed current‐control strategy is compared with the conventional proportional-integral (PI) current controller, model‐based phase‐shift controller (MBPS) and load current feed‐forward controller (LCFF). Both the experimental and simulation results have validated the effectiveness of the proposed control strategy.
Original languageEnglish
Article number8850
JournalEnergies
Volume15
Issue number23
Early online date23 Nov 2022
DOIs
Publication statusPublished - Dec 2022

Keywords

  • bidirectional DAB–DC/DC converter
  • constant-current control
  • fast dynamic performance
  • off-board EV charging
  • renewable energy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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