Abstract
This paper presents a large-scale multi-objective design optimization for a direct-drive wind turbine generator concept that is based upon an experimentally validated computational model for a small-scale prototype motor of the same type. By integrating an outer reluctance-type rotor and a segmented stator with toroidally wound single-coil modules containing spoke-type PMs, the design optimization aims to minimize losses, active mass, and torque ripple while adhering to a power factor constraint. The AC windings and PMs are positioned in the stator and this concept enhances flux concentration, enabling the use of more affordable high energy non-rare-earth (special type) magnets. The exterior rotor follows a simplified reluctance-type configuration, eliminating active electromagnetic components. The operational principle, described in detail, guides design studies using electromagnetic 2D finite element analysis (FEA), showcasing the potential of this configuration to match rareearth PM performance, with special type PMs, thus addressing cost and supply challenges. Furthermore, alternative materials including the substitution of aluminum wire for copper wire, have also been investigated in this study. The proposed multiobjective design optimization uses the response surface method (RSM) to initiate the optimization and the results on a 3MW, 15rpm generator, highlight the benefits of this topology, achieving competitive metrics like goodness, specific thrust, and efficiency without rare-earth permanent magnets.
Document Type
Article
Publication Date
Summer 5-6-2024
Digital Object Identifier (DOI)
https://doi.org/10.1109/TIA.2024.3396792
Funding Information
QM Power, Inc.
Repository Citation
Mohammadi, Ali; Badewa, Oluwaseun A.; Chulaee, Yaser; Lewis, Donovin D.; Essakiappan, Somasundaram; Manjrekar, Madhav; and Ionel, Dan M., "Design Optimization of a Direct-Drive Wind Generator with a Reluctance Rotor and a Flux Intensifying Stator Using Different PM Types" (2024). Power and Energy Institute of Kentucky Faculty Publications. 92.
https://uknowledge.uky.edu/peik_facpub/92
Notes/Citation Information
A. Mohammadi et al., "Design Optimization of a Direct-Drive Wind Generator With a Reluctance Rotor and a Flux Intensifying Stator Using Different PM Types," in IEEE Transactions on Industry Applications, vol. 60, no. 4, pp. 6113-6123, July-Aug. 2024, doi: 10.1109/TIA.2024.3396792.