A Bidirectional GaN-Based CLLC Converter for Plug-In Electric Vehicles On-Board Chargers

Ahmed Morsi Ammar, Kawsar Ali, Daniel J. Rogers

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

This paper presents a bidirectional CLLC converter solution for the dc-dc stage in plug-in electric vehicle (PEV) onboard battery chargers. The proposed architecture allows the converter to operate at resonance for the bidirectional constantpower (CP) load range with a variable bus voltage, while frequency modulation is employed for the constant-current (CC) load range in the grid-to-vehicle (G2V) mode with a fixed bus voltage, resulting in a limited bus voltage range. This enables the
use of 650-V Gallium nitride (GaN) devices for the primary and secondary sides’ switches. The design flow is presented and a 1-kW high-frequency prototype is implemented. GaN reverse conduction characteristics are investigated and employed for the high-frequency current rectification. The prototype operates with soft switching across the operational range, achieving an efficiency of up to 95.7%, with the resonant inductances integrated in the transformer.
Original languageEnglish
Title of host publicationProceedings of 46th Annual Conference of the IEEE Industrial Electronics Society
Number of pages7
PublisherIEEE
Publication statusAccepted/In press - 2021
Event46th Annual Conference of the IEEE Industrial Electronics Society - Marina Bay Sands Expo and Convention Centre, Singapore, Singapore
Duration: 18 Oct 202021 Oct 2020
http://www.iecon2020.org/

Conference

Conference46th Annual Conference of the IEEE Industrial Electronics Society
LocationMarina Bay Sands Expo and Convention Centre
CountrySingapore
CitySingapore
Period18/10/202021/10/2020
Internet address

Keywords

  • Electric vehicles
  • dc-dc converters
  • Resonant power conversion
  • Wide bandgap semiconductors
  • Bidirectional converters

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