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 language | English |
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Title of host publication | 11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022 |
Pages | 582-587 |
Number of pages | 6 |
ISBN (Electronic) | 9781665471404 |
DOIs | |
State | Published - 2022 |
Event | 11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022 - Istanbul, Turkey Duration: Sep 18 2022 → Sep 21 2022 |
Publication series
Name | 11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022 |
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Conference
Conference | 11th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2022 |
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Country/Territory | Turkey |
City | Istanbul |
Period | 9/18/22 → 9/21/22 |
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