In‐plane eddy current analysis for end and interior stator core packets of turbine generators
| Autor: | Kenichi Hattori, Yuki Yamato, Chikara Kaido, Kazuhiko Takahashi, Katsumi Yamazaki, Kazumasa Ide, Akihito Nakahara, Hisashi Mogi |
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| Rok vydání: | 2010 |
| Předmět: |
Engineering
Stator business.industry Network packet Applied Mathematics Mechanical engineering Mechanics engineering.material Turbine Finite element method Computer Science Applications law.invention Computational Theory and Mathematics law Steam turbine Eddy current Duct (flow) Electrical and Electronic Engineering business Electrical steel |
| Zdroj: | COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 29:1218-1231 |
| ISSN: | 0332-1649 |
| DOI: | 10.1108/03321641011061434 |
| Popis: | PurposeThe purpose of this paper is to investigate the distribution of in‐plane eddy currents in stator core packets of turbine generators, and to reveal the loss reduction effect by the slits in the stator teeth.Design/methodology/approachThe in‐plane eddy currents are calculated by a 3D finite element method that considers lamination of electrical steel sheets. First, this method is applied to a simple model that simulates the stator core of the turbine generators. The calculated losses are compared with the measured losses in order to confirm the validity. Next, the same method is applied to a 250 MVA class turbine generator.FindingsThe validity of the calculation method is confirmed by the measurement of the simple model. By applying this method to the turbine generator, it is clarified that the considerable in‐plane eddy currents are generated not only at the end stator packets, but also at the top of the teeth of the interior packets due to the duct space. It is also clarified that the in‐plane eddy‐current loss decreases as nearly half by the slits of the stator teeth.Originality/valueA reliable calculation method for the in‐plane eddy‐current loss in the turbine generators is developed. The results obtained by this method are valuable for the design of the generator from the viewpoint of heat conduction. |
| Databáze: | OpenAIRE |
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