Variable-pole induction machine drive for electric vehicles

Elie Libbos, Bonhyun Ku, Shivang Agrawal, Samira Tungare, Arijit Banerjee, Philip T. Krein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High power density, high efficiency, and inexpensive drivetrains operating over wide speed and torque ranges are critical for electric vehicles (EVs). The induction machine (IM) offers a cost-effective and reliable alternative to permanent magnet-based solutions. A fixed pole IM's high torque requirement at low speed sacrifices its performance at partial loads and high speeds. A variable-pole IM has an additional degree of freedom which is the pole count. This paper uses a variable pole count to improve IM performance over a wide torque and speed range. An approach to select the best pole configuration for a given operation strategy is presented. For illustration, a maximum torque per ampere (MTPA) strategy is used on a 36-slot toroidally wound IM. Variable-pole operation increases the torque capability of the machine and enlarges its high efficiency region to a wide speed range. The analytical results provide guidelines for designing and operating a variable-pole machine tailored for this application.

Original languageEnglish (US)
Title of host publication2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages515-522
Number of pages8
ISBN (Electronic)9781538693490
DOIs
StatePublished - May 2019
Event11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States
Duration: May 12 2019May 15 2019

Publication series

Name2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019

Conference

Conference11th IEEE International Electric Machines and Drives Conference, IEMDC 2019
CountryUnited States
CitySan Diego
Period5/12/195/15/19

Keywords

  • Electric drives
  • Electric vehicle
  • Induction machine
  • Multiphase drives
  • Power electronics
  • Transportation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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  • Cite this

    Libbos, E., Ku, B., Agrawal, S., Tungare, S., Banerjee, A., & Krein, P. T. (2019). Variable-pole induction machine drive for electric vehicles. In 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 (pp. 515-522). [8785212] (2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IEMDC.2019.8785212