Cogging torque reduction in axial flux machines for small wind turbines

Min-Fu Hsieh, D. G. Dorrell, Yu Han Yeh, Samsul Ekram

Research output: Contribution to conferencePaper

12 Citations (Scopus)

Abstract

This paper presents a technique for cogging torque reduction in an axial-flux permanent-magnet (PM) generator suitable for use in a small wind turbine. These machines can be compact and have high power density; they are axially short with larger diameter which makes then very suitable for a wind turbine. The inherent cogging torque can cause problems during turbine start-up and cut-in. In this paper, a turbine is characterized via the measurement in a wind tunnel. The characteristics are then used to determine the specification for the generator. A method called "hybrid skew" is proposed for cogging torque reduction. 3-D finite element analysis is applied to evaluate the method and a 88 % reduction of peak cogging torque was obtained when combined with another known technique. This significantly improves the turbine performance at low start-up speed while maintaining high power density. The technique can reduce manufacturing confusion in N/S pole placement and allow a simple magnet shape for lower cost manufacturing.

Original languageEnglish
Pages4435-4439
Number of pages5
DOIs
Publication statusPublished - 2009 Dec 1
Event35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009 - Porto, Portugal
Duration: 2009 Nov 32009 Nov 5

Other

Other35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009
CountryPortugal
CityPorto
Period09-11-0309-11-05

Fingerprint

Wind turbines
Torque
Fluxes
Turbines
Permanent magnets
Wind tunnels
Magnets
Poles
Specifications
Finite element method
Costs

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Hsieh, M-F., Dorrell, D. G., Yeh, Y. H., & Ekram, S. (2009). Cogging torque reduction in axial flux machines for small wind turbines. 4435-4439. Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal. https://doi.org/10.1109/IECON.2009.5414896
Hsieh, Min-Fu ; Dorrell, D. G. ; Yeh, Yu Han ; Ekram, Samsul. / Cogging torque reduction in axial flux machines for small wind turbines. Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal.5 p.
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Hsieh, M-F, Dorrell, DG, Yeh, YH & Ekram, S 2009, 'Cogging torque reduction in axial flux machines for small wind turbines' Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal, 09-11-03 - 09-11-05, pp. 4435-4439. https://doi.org/10.1109/IECON.2009.5414896

Cogging torque reduction in axial flux machines for small wind turbines. / Hsieh, Min-Fu; Dorrell, D. G.; Yeh, Yu Han; Ekram, Samsul.

2009. 4435-4439 Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal.

Research output: Contribution to conferencePaper

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Hsieh M-F, Dorrell DG, Yeh YH, Ekram S. Cogging torque reduction in axial flux machines for small wind turbines. 2009. Paper presented at 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal. https://doi.org/10.1109/IECON.2009.5414896