Fan Performance Analysis for Rotor Cooling of Axial Flux Permanent Magnet Machines

A. S. Fawzal, Remus M. Cirstea, Konstantinos N. Gyftakis, Tim J. Woolmer, Mike Dickison, Mike Blundell

Research output: Contribution to journalArticle

7 Citations (Scopus)
452 Downloads (Pure)

Abstract

The thermal management of an Axial Flux Permanent Magnet (AFPM) machine is essential because it determines the machine’s continuous power output and reliability. In this paper, a secondary cooling method is proposed using rotor cooling which allows better thermal management on the permanent magnets that are attached to the rotor. This will reduce the potential of the machine failing due to magnet demagnetization and degradation. Thermal analysis via Lumped Parameter (LM) networks is usually sufficient in predicting the motor’s thermal behaviour. However, the accuracy of the prediction can be increased especially for devices with complex flow regions by Computational Fluid Dynamics (CFD). In this study, the fan blade was attached to the rotor of a Yokeless and Segmented Armature (YASA) machine for flow validation and then three different fan blade designs from other engineering applications were tested. The evaluation includes the flow characteristic, power requirement and thermal characteristic for the AFPM’s rotor cooling applications. Additionally, the Rotor Cooling Performance Index (RCPI) is introduced to assess each fan design performance.

Publisher Statement: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Original languageEnglish
Pages (from-to)3295-3304
Number of pages10
JournalIEEE Transactions on Industry Applications
Volume53
Issue number4
Early online date1 Mar 2017
DOIs
Publication statusPublished - Jul 2017

Bibliographical note

© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

  • Axial flux
  • Permanent magnet machines
  • Fluid dynamics
  • Rotors
  • Cooling
  • Fluid flow
  • Thermal analysis
  • CFD
  • SAT
  • Yokeless and segmented armature machine

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