Torque and Power Capabilities of Coreless Axial Flux Machines with Surface PMs and Halbach Array Rotors

Yaser Chulaee, Donovin Lewis, Matin Vatani, John F. Eastham, Dan M. Ionel

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

6 Citations (SciVal)

Abstract

This paper investigates employing a Halbach PM rotor array to increase torque and power density within coreless axial flux permanent magnet (AFPM) machines. Analytical and 2/3-dimensional finite element analysis (FEA) methods are developed to study torque and power capabilities within an example double-rotor, single-stator coreless AFPM machine with a PCB stator. Compared to a surface PM topology of the same mass and volume, employing a Halbach array increases torque density by as much as 30% through increased airgap flux density amplitude. Multiple parametric studies are performed to explore methods of increasing torque and power density while employing Halbach arrays combined with enhanced cooling methods and coil transposition to minimize associated losses. A design procedure is also developed that relies on the advantages of coreless AFPM machines controlled by ultra-high-frequency SiC-based drive systems to maximize potential torque gain.

Original languageEnglish
Title of host publication2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023
Place of PublicationU. S. A.
PublisherIEEE
ISBN (Electronic)9798350398991
DOIs
Publication statusPublished - 6 Sept 2023
Event2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023 - San Francisco, USA United States
Duration: 15 May 202318 May 2023

Publication series

Name2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023

Conference

Conference2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023
Country/TerritoryUSA United States
CitySan Francisco
Period15/05/2318/05/23

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This paper is based upon work supported by the National Science Foundation (NSF) under Award No. #1809876. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF. The support of AN-SYS Inc., and University of Kentucky, the L. Stanley Pigman Chair in Power Endowment is also gratefully acknowledged.

Keywords

  • AFPM machines
  • Axial-flux
  • coreless machines
  • eddy current
  • FEA
  • Halbach-array
  • PCB stator
  • permanent-magnet machines

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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