Axial-field Vernier-type Flux Modulation Machines for Low-speed Direct-drive Applications

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13 Scopus citations

Abstract

This paper proposes different configurations of axial-field machines featuring a very large ratio of the number of rotor poles to stator teeth and coils suitable for low-speed direct-drive traction applications. The machines have a single rotor with spoke-type permanent magnets and the stator teeth include auxiliary slots, the function of which is to enhance the high-polarity component of the stator magnetomotive force interacting with the rotor to produce a net torque. The machines can be constructed with three or two phases, in which case they inherently exhibit high tolerance to faults due to the combined effect of a lack of coupling between phases and a relatively large phase inductance. A preliminary comparative simulation study shows performance improvement over a conventional reference permanent magnet synchronous machine.

Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3123-3128
Number of pages6
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Externally publishedYes
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States
CityBaltimore
Period09/29/1910/3/19

Funding

ACKNOWLEDGMENT The support of National Science Foundation NSF Grant #1809876, of University of Kentucky, the L. Stanley Pigman endowment and of ANSYS, Inc. is gratefully acknowledged. The authors would also like to thank Professor Ion G. Boldea from University of Politehnica of Timisoara, Timisoara, Romania, for valuable suggestions and discussions.

Keywords

  • Axial-field
  • Direct-drive
  • Fault tolerance
  • Flux concentration
  • Flux modulation
  • Low-speed
  • Permanent magnet synchronous machine

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