In-plane eddy current analysis for end and interior stator core packets of turbine generators

Author

Yamazaki, Katsumi ; Yamato, Yuki ; Mogi, Hisashi ; Kaido, Chikara ; Nakahara, Akihito ; Takahashi, Kazuhiko ; Ide, Kazumasa ; Hattori, Kenichi

Author_Institution

Dept. of Electr. Electron. & Comput. Eng., Chiba Inst. of Technol., Narashino

fYear

2008

fDate

6-9 Sept. 2008

Firstpage

1

Lastpage

6

Abstract

This paper describes analyses of in-plane eddy currents, which are generated by the perpendicular flux at both of end and interior stator core packets of turbine generators. The 3-D finite element method considering lamination of the electrical steel sheets is applied to the calculation. The validity of the analysis is examined by a simple apparatus that simulates the stator core of the turbine generator. It is clarified that the in-plane eddy currents are generated not only at the end stator packets, but also at the interior packet 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.

Keywords

eddy currents; finite element analysis; stators; turbogenerators; 3D finite element method; electrical steel sheets; in-plane eddy current analysis; perpendicular flux; stator core packets; turbine generators; Conductivity; Ducts; Eddy currents; Finite element methods; Insulation; Magnetic flux; Stator cores; Steel; Teeth; Turbines;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines, 2008. ICEM 2008. 18th International Conference on

Conference_Location

Vilamoura

Print_ISBN

978-1-4244-1735-3

Electronic_ISBN

978-1-4244-1736-0

Type

conf

DOI

10.1109/ICELMACH.2008.4799913

Filename

4799913