Designing and Prototyping an Axial-Flux Machine Using Ferrite PM and Round Wire for Traction Applications: Comparison with a Radial-Flux Machine Using Nd-Fe-B PM and Rectangular Wire

Ren Tsunata, Kosuke Izumiya, Masatsugu Takemoto, Jun Imai, Tatsuya Saito, Tomoyuki Ueno

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This paper proposes a novel axial-flux permanent magnet machine (AFPM) employing ferrite permanent magnets (PMs) and round copper wire. The proposed AFPM adopts a novel rotor structure and uses tooth-tips with a suitable trapezoidal shape. These structures compensate for the low magnetomotive force of the round copper wire and ferrite PMs, achieving high performance at low cost. Additionally, compared with an off-the-shelf radial-flux permanent magnet machine (RFPM) using Nd-sintered PMs and rectangular copper wire, the proposed AFPM achieves the same output power and higher efficiency, despite using ferrite PMs and the round copper wire. Finally, a prototype of the proposed AFPM was manufactured and evaluated experimentally. The prototype achieved a high efficiency of over 95% across a wide operating area while maintaining required maximum torque, suggesting its potential for traction applications.

Original languageEnglish
Pages (from-to)1-15
Number of pages15
JournalIEEE Transactions on Industry Applications
DOIs
Publication statusAccepted/In press - 2024

Keywords

  • axial gap motor
  • axial-flux machine
  • carbon fiber rotor
  • carbon fiber-reinforced plastic
  • city commuter
  • Copper
  • Costs
  • ferrite magnet
  • Ferrites
  • flat copper wire
  • high circumferential speed
  • radial-flux machine
  • Rotors
  • Stator cores
  • Torque
  • Wires

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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