Direct-Drive Wind Generator Concept with Non-Rare-Earth PM Flux Intensifying Stator and Reluctance Outer Rotor

Ali Mohammadi, Oluwaseun A. Badewa, Yaser Chulaee, Dan M. Ionel, Somasundaram Essakiappan, Madhav Manjrekar

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

8 Scopus citations

Abstract

This paper proposes a novel concept for an electric generator in which both ac windings and permanent magnets (PMs) are placed in the stator. Concentrated windings with a special pattern and phase coils placed in separate slots are employed. The PMs are positioned in a spoke-type field concentrating arrangement, which provides high flux intensification and enables the use of lower remanence and energy non-rare earth magnets. The rotor is exterior to the stator and has a simple and robust reluctance-type configuration without any active electromagnetic excitation components. The principle of operation is introduced based on the concept of virtual work with closed-form analytical airgap flux density distributions. Initial and parametric design studies were performed using electromagnetic FEA for a 3MW direct-drive wind turbine generator employing PMs of different magnetic remanence and specific energy. Results include indices for the goodness of excitation and the goodness of the electric machine designs; loss; and efficiency estimations, indicating that performance comparable to PM synchronous designs employing expensive and critical supply rare-earth PMs may be achieved with non-rare earth PMs using the proposed configuration.

Original languageEnglish
Title of host publication11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022
Pages582-587
Number of pages6
ISBN (Electronic)9781665471404
DOIs
StatePublished - 2022
Event11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022 - Istanbul, Turkey
Duration: Sep 18 2022Sep 21 2022

Publication series

Name11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022

Conference

Conference11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022
Country/TerritoryTurkey
CityIstanbul
Period9/18/229/21/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

Keywords

  • Direct-drive generator
  • FEA
  • electric machine
  • flux-intensifying topology
  • spoke permanent magnets
  • toroidal winding
  • wind turbine

ASJC Scopus subject areas

  • Information Systems and Management
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Direct-Drive Wind Generator Concept with Non-Rare-Earth PM Flux Intensifying Stator and Reluctance Outer Rotor'. Together they form a unique fingerprint.

Cite this