Fast Switching SiC Cascode JFETs for EV Traction Inverters

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  • Additional Information
    • Publication Information:
      IEEE
    • Publication Date:
      2020
    • Abstract:
      This paper investigates the potential performance of high speed SiC cascode JFETs in EV traction inverters with high switching frequencies. Traction inverters implemented with SiC devices have shown improved energy conversion efficiency compared to IGBT based traction inverters however SiC MOSFETs suffer from unstable threshold voltage due to charge trapping at the SiC/SiO 2 (due to high density of traps). Since SiC cascode JFETs combine low voltage silicon MOSFETs (at the input) with high speed/high-power density SiC JFETs (at the output), cascode JFETs combine the electrical gate oxide reliability of silicon devices with the power density of SiC. This paper simulates an EV driving cycle using experimental power loss measurements (at different currents and temperatures) of commercially available 650V SiC cascode JFETs and SiC MOSFETs. The inverter has been simulated at 10, 25 and 50 kHz to investigate the impact of increased switching frequency on device losses. The model is fully electrothermal since conduction and switching losses have been measured at different junction temperatures and used as inputs to the model. The results show the potential of superior performance of the SiC cascode JFET in terms of power loss and junction temperature swings. Furthermore, since higher switching frequencies might be desirable in future high-speed traction motors, the fast switching and low loss performance of SiC Cascode JFETs becomes more attractive.
    • Contents Note:
      Conference Acronym: APEC
    • Author Affiliations:
      University of Warwick,School of Engineering,Coventry,UK
    • ISBN:
      978-1-7281-4829-8
      978-1-7281-4828-1
    • ISSN:
      2470-6647
    • Relation:
      2020 IEEE Applied Power Electronics Conference and Exposition (APEC)
    • Accession Number:
      10.1109/APEC39645.2020.9124052
    • Rights:
      Copyright 2020, IEEE
    • AMSID:
      9124052
    • Conference Acronym:
      APEC
    • Date of Current Version:
      2020
    • Document Subtype:
      IEEE Conference
    • Notes:
      Conference Location: New Orleans, LA, USA, USA

      Conference Start Date: 15 March 2020

      Conference End Date: 19 March 2020
    • Accession Number:
      edseee.9124052
  • Citations
    • ABNT:
      WU, R. et al. Fast Switching SiC Cascode JFETs for EV Traction Inverters. 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, [s. l.], p. 3489–3496, 2020. DOI 10.1109/APEC39645.2020.9124052. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edseee&AN=edseee.9124052. Acesso em: 30 set. 2020.
    • AMA:
      Wu R, Gonzalez JO, Davletzhanova Z, Mawby P, Alatise O. Fast Switching SiC Cascode JFETs for EV Traction Inverters. 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE. March 2020:3489-3496. doi:10.1109/APEC39645.2020.9124052
    • APA:
      Wu, R., Gonzalez, J. O., Davletzhanova, Z., Mawby, P., & Alatise, O. (2020). Fast Switching SiC Cascode JFETs for EV Traction Inverters. 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, 3489–3496. https://doi.org/10.1109/APEC39645.2020.9124052
    • Chicago/Turabian: Author-Date:
      Wu, Ruizhu, Jose Ortiz Gonzalez, Zarina Davletzhanova, Philip Mawby, and Olayiwola Alatise. 2020. “Fast Switching SiC Cascode JFETs for EV Traction Inverters.” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, March, 3489–96. doi:10.1109/APEC39645.2020.9124052.
    • Harvard:
      Wu, R. et al. (2020) ‘Fast Switching SiC Cascode JFETs for EV Traction Inverters’, 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, pp. 3489–3496. doi: 10.1109/APEC39645.2020.9124052.
    • Harvard: Australian:
      Wu, R, Gonzalez, JO, Davletzhanova, Z, Mawby, P & Alatise, O 2020, ‘Fast Switching SiC Cascode JFETs for EV Traction Inverters’, 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, pp. 3489–3496, viewed 30 September 2020, .
    • MLA:
      Wu, Ruizhu, et al. “Fast Switching SiC Cascode JFETs for EV Traction Inverters.” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, Mar. 2020, pp. 3489–3496. EBSCOhost, doi:10.1109/APEC39645.2020.9124052.
    • Chicago/Turabian: Humanities:
      Wu, Ruizhu, Jose Ortiz Gonzalez, Zarina Davletzhanova, Philip Mawby, and Olayiwola Alatise. “Fast Switching SiC Cascode JFETs for EV Traction Inverters.” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE, March 1, 2020, 3489–96. doi:10.1109/APEC39645.2020.9124052.
    • Vancouver/ICMJE:
      Wu R, Gonzalez JO, Davletzhanova Z, Mawby P, Alatise O. Fast Switching SiC Cascode JFETs for EV Traction Inverters. 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), Applied Power Electronics Conference and Exposition (APEC), 2020 IEEE [Internet]. 2020 Mar 1 [cited 2020 Sep 30];3489–96. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edseee&AN=edseee.9124052