Fast Sizing Tool and Optimization Technique for Concentrated Wound Slotless Outer Rotor Motor for eVTOL Application

Nisarg Dave, David Gerada, Gaurang Vakil, Alan Zhang, Bowen Shi, Fengyu Zhang, Jing Li, Chris Gerada

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

This paper aims to present the feasibility and advantages of slotless motors for electric aircraft applications. Currently, eVTOL (electric vertical takeoff and landing) aircraft are equipped with a slotted motor with concentrated windings and an outer rotor with strong magnets. Slotless machines with Halbach array can offer significant advantages over traditional slotted machines. Instead of using the round conductor, this paper is focused on the slotless coils made up of stranded copper strips, which leads to a low inductance machine. Furthermore, employing a drive made up of wide bandgap semiconductors enables slotless technology. The paper presents analytical modelling of the slotless machine and compares different groupings of the concentrated winding for the same number of poles. This analytical model is coupled with the optimization tool to find the most power-dense design, and these designs are validated with the commercially available FEA software to demonstrate the accuracy of the proposed method.

Original languageEnglish
Title of host publication2022 International Conference on Electrical Machines, ICEM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2094-2099
Number of pages6
ISBN (Electronic)9781665414326
DOIs
Publication statusPublished - 2022
Event2022 International Conference on Electrical Machines, ICEM 2022 - Valencia, Spain
Duration: 5 Sep 20228 Sep 2022

Publication series

Name2022 International Conference on Electrical Machines, ICEM 2022

Conference

Conference2022 International Conference on Electrical Machines, ICEM 2022
Country/TerritorySpain
CityValencia
Period5/09/228/09/22

Keywords

  • airgap winding
  • concentrated winding
  • eVTOL
  • fast sizing tool
  • Halbach magnets
  • optimization
  • power density
  • Slotless machine

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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