Title :
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
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;
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
DOI :
10.1109/ICEMS.2005.202929
