Calculation and analysis of 3D magnetic field for end region of large turbogenerators

Author

Jinxiang, Li ; Yutian, Sun ; Guijie, Yang

Author_Institution

Harbin Res. Inst. of Large Electr. Machinery

Volume

3

fYear

2005

fDate

29-29 Sept. 2005

Firstpage

2079

Abstract

In order to estimate the losses and temperature rise at the end of electrical machines, it gets more and more important to make detailed calculation on end region magnetic field of large turbogenerators. The magnetic field distribution in end region of a large generator is complicated. It is necessary to adopt 3D FEM. To investigate into the clamping bolts failure of a generator, a computation on 210 MW turbogenerator is made, where load magnetic field in end region is analyzed directly with software FLUX in two scalar potential in this paper. The field domain not only consists of pressing plate, clamping bolts and stator and rotor windings, but also parts of stator and rotor core in the end. The operational conditions for calculation mainly include no load, rated load with stator end winding at 30deg and 31.5deg conical angle. Comparison of calculated results and measured results are made in a turbogenerator of Qinghe power station

Keywords

electric machine analysis computing; finite element analysis; magnetic fields; rotors; stators; turbogenerators; 210 MW; 3D FEM; 3D magnetic field; Qinghe power station; clamping bolts failure; end region; losses estimation; magnetic field distribution; pressing plate; rotor core; rotor windings; software FLUX; stator core; temperature rise estimation; turbogenerators; Clamps; Failure analysis; Fasteners; Magnetic analysis; Magnetic fields; Pressing; Stator cores; Stator windings; Temperature; Turbogenerators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on

Conference_Location

Nanjing

Print_ISBN

7-5062-7407-8

Type

conf

DOI

10.1109/ICEMS.2005.202929

Filename

1575126