Abstract
This paper proposes a concept for a coreless axial flux permanent magnet (CAFPM) generator with a double-sided Halbach array rotor for direct-drive offshore wind turbine applications. The application of printed circuit board (PCB) technology is explored as applied to a concentrated winding stator due to its high reliability, repeatability, and fast mass production. A double-sided Halbach array rotor is employed to intensify the airgap flux density and to enable the elimination of the rotor back iron, decreasing the generator's total active mass. The effect of the Halbach array rotor pole number and magnet-to-magnet (M2M) gap on the airgap flux density and power capability is studied through analytical and 2/3-dimensional finite element (FEA) methods. Multiple parametric studies are performed for an example design to investigate the power capability of the proposed CAFPM generator concept. The parametric study results indicate that Halbach array implementation can reduce active mass with the trade-off of including significantly more magnetic material for a conventional machine of a similar size. Advancements in PCB technology or transitioning to alternative windings to improve winding fill factor could provide comparable performance to conventional cored machines with lower overall active mass.
| Original language | English |
|---|---|
| Title of host publication | 12th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2023 |
| Place of Publication | U. S. A. |
| Publisher | IEEE |
| Pages | 612-617 |
| Number of pages | 6 |
| ISBN (Electronic) | 9798350337938 |
| ISBN (Print) | 9798350337945 |
| DOIs | |
| Publication status | Published - 6 Oct 2023 |
| Event | 12th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2023 - Oshawa, Canada Duration: 29 Aug 2023 → 1 Sept 2023 |
Publication series
| Name | 12th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2023 |
|---|
Conference
| Conference | 12th IEEE International Conference on Renewable Energy Research and Applications, ICRERA 2023 |
|---|---|
| Country/Territory | Canada |
| City | Oshawa |
| Period | 29/08/23 → 1/09/23 |
Bibliographical note
Funding Information:This paper is based upon work supported by the National Science Foundation (NSF) under Award No. #1809876. The support for Donovin Lewis through an NSF Fellowship under Grant No. 1839289, and of ANSYS Inc., and University of Kentucky, the L. Stanley Pigman Chair in Power endowment is also gratefully acknowledged. Any findings and conclusions expressed herein are those of the authors and do not necessarily reflect the views of the NSF.
Funding
This paper is based upon work supported by the National Science Foundation (NSF) under Award No. #1809876. The support for Donovin Lewis through an NSF Fellowship under Grant No. 1839289, and of ANSYS Inc., and University of Kentucky, the L. Stanley Pigman Chair in Power endowment is also gratefully acknowledged. Any findings and conclusions expressed herein are those of the authors and do not necessarily reflect the views of the NSF.
Keywords
- AFPM machine
- coreless machine
- Direct-drive generator
- FEA
- Halbach array
- PCB stator
- wind turbine
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Electrical and Electronic Engineering
- Mechanical Engineering
- Control and Optimization
