Title :
Approximate three-dimensional finite element analysis of large permanent magnet sychronous generators with stator radial ventilating ducts
Author :
Weizhong Fei ; Luk, Patrick Chi-Kwong ; Wu, Dalei ; Bing Xia
Author_Institution :
Dept. of Offshore, Process & Energy Eng., Cranfield Univ., Cranfield, UK
Abstract :
The stator lamination cores in most of the high-power permanent magnet synchronous machine (PMSM) are axially segmented into a number of substacks by stator radial ventilating ducts so that the effective thermal management of the stator windings can be accomplished. However, these radial cooling ducts will impose certain impacts on electromagnetic characteristics especially in the axial direction, which could potentially lead to inaccurate predictions from conventional two-dimensional (2-D) finite element analysis (FEA). Hence, complex three-dimensional (3-D) FEA, which is of high computational intensity, is essential to accurately evaluate the overall effects of these air ducts. A novel approach based on synthesized 3-D FEA with approximate boundary conditions is proposed in this paper in order to alleviate computational load. The results from the 2-D, proposed synthesized and comprehensive 3-D FEA methods have revealed that the proposed 3-D FEA method can not only deliver more accurate predictions than the conventional 2-D FEA one, but also consume much less computational time than the comprehensive 3-D FEA one.
Keywords :
ducts; finite element analysis; permanent magnet motors; stators; synchronous motors; ventilation; 2D FEA method; 3D FEA method; PMSM; air ducts; approximate boundary conditions; approximate three-dimensional finite element analysis; axial direction; electromagnetic characteristics; high computational intensity; high-power permanent magnet synchronous machine; large permanent magnet synchronous generators; radial cooling ducts; stator radial ventilating ducts; stator windings; thermal management; Ducts; Forging; Rotors; Solid modeling; Stator windings; Torque; direct drive; finite element analysis; permanent magnet synchronous machine; stator radial ventilating duct; three-dimensional;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6700349