Torque-density improvement in brushless doubly-fed reluctance machines using additional stator winding

Shivang Agrawal, Arijit Banerjee

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

Abstract

Brushless doubly-fed machine (BDFM) is an attractive option for megawatt-scale wind-energy generation and electrified transportation due to its partially-rated power converter, reduced maintenance, and absence of permanent magnets. However, BDFMs have inherently poor torque density because of under-utilized machine magnetics in terms of achievable peak air-gap flux density that drastically offsets all the benefits. This paper proposes to use an additional electrical port to better utilize the machine magnetics through interaction of multiple spatial airgap harmonics that lead to additional torque production. Using FEA, the performance of the proposed motor is analyzed and compared with that of a BDFM with two electrical ports to highlight the merits of the proposed design. With the addition and appropriate excitation of the extra stator winding, torque is improved by 26% as compared to a conventional BDFM.

Original languageEnglish (US)
Title of host publication2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages314-321
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
Country/TerritoryUnited States
CitySan Diego
Period5/12/195/15/19

Keywords

  • Air-gap flux density
  • Brushless
  • Current rating
  • Doubly fed
  • Optimization
  • Rotor modulation

ASJC Scopus subject areas

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

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