Interoperability of the Voltage/Current Doubler Converter Employing Bipolar Pads with the SAE J2954 VA WPT2/Z2 for EV Wireless Charging

Francesca Grazian, Thiago Batista Soeiro, Pavol Bauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

This paper investigates the interoperability of the proposed voltage/current doubler (V/I-D) converter used for wireless charging of electric vehicles (EVs), which achieves high efficiency when charging both 400V and 800V batteries at the same power. Nominally, the V/I-D converter employs bipolar pads (BPP) at both the primary and the secondary circuits. In this study, the functionality of the converter is assessed when the primary BPP is coupled with a standard secondary coil, here being the VA test station WPT2/Z2 from SAE J2954. First, the intended operation of the V/I- D converter is explained. After that, the equivalent circuit of the BPP primary coupled with the standardized secondary coil is modeled analytically. The operation based on the misalignment is discussed. Then, the interoperability is verified through experimental results for the entire constant current charging mode for a rated output power of 7.2kW. Even though the functionality of the V/I-D converter is not optimal during the interoperability, the measured DC-to-DC power transfer efficiency in the considered operating range reaches the maximum at 95.22%, while the minimum is 92.86%.
Original languageEnglish
Title of host publicationProceedings of the 2022 IEEE 20th International Power Electronics and Motion Control Conference (PEMC)
PublisherIEEE
Pages346-352
Number of pages7
ISBN (Electronic)978-1-6654-9681-0
ISBN (Print)978-1-6654-9682-7
DOIs
Publication statusPublished - 2022
Event2022 IEEE 20th International Power Electronics and Motion Control Conference (PEMC) - Brasov, Romania
Duration: 25 Sept 202228 Sept 2022
Conference number: 20th

Publication series

Name2022 IEEE 20th International Power Electronics and Motion Control Conference, PEMC 2022

Conference

Conference2022 IEEE 20th International Power Electronics and Motion Control Conference (PEMC)
Country/TerritoryRomania
CityBrasov
Period25/09/2228/09/22

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Battery voltage
  • bipolar pads
  • compensation networks
  • cross-coupling
  • electric vehicles
  • inductive power transfer
  • interoperability
  • rectangular coils
  • wireless charging

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