Title :
Development of an electromagnetic shield against proximity heating around the terminal leads of a large hydrogenerator
Author_Institution :
GE Hydro, Peterborough, Ont., Canada
Abstract :
Due to space restrictions in the power house of a 612 MVA hydrogenerator, the terminal leads are routed through a magnetic steel structure. Without adequate shielding, the proximity heating in this support structure is expected to result in temperatures up to 500°C. This paper describes laboratory tests as well as time-harmonic finite element analyses that were carried out in the development of a novel shielding configuration of the steel structure. With this new shield, the temperature rise is reduced to 45°C which is confirmed by preliminary site tests
Keywords :
electromagnetic shielding; finite element analysis; heating; hydroelectric generators; machine testing; machine theory; 45 C; 612 MVA; electromagnetic shield development; hydrogenerator; laboratory tests; magnetic steel structure; proximity heating; shielding configuration; temperature rise; terminal leads; time-harmonic finite element analyses; Conductors; Electromagnetic heating; Electromagnetic shielding; Finite element methods; Hydroelectric power generation; Magnetic analysis; Magnetic shielding; Steel; Temperature; Testing;
Conference_Titel :
Electric Machines and Drives, 1999. International Conference IEMD '99
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5293-9
DOI :
10.1109/IEMDC.1999.769232
