Title :
Calculation of losses in the end region of turbogenerators
Author :
Jacobs, D.A.H. ; Minors, R.H. ; Steel, J.G. ; Myerscough, C.J. ; Rollason, M.L.J.
Author_Institution :
CEGB, Central Electricity Research Laboratories, Leatherhead, UK
fDate :
4/1/1977 12:00:00 AM
Abstract :
A method has been developed for computing electromagnetic fields and eddy-current heating in and around the core ends of large generators. The effect of tooth geometry. Pistoye slots, cooling ducts, anisotropy saturation, distributed eddy currents and variable stacking factor are included. The calculation is formulated as a 2-potential 3-dimensional nonlinear boundary-value problem, and solved by an iterative finite-difference scheme with crosscoupled harmonics. The predicted axial fields have been compared with measurements on a 500 MW machine.
Keywords :
boundary-value problems; eddy current losses; electromagnetic fields; finite element analysis; iterative methods; turbogenerators; 500 MW machine; eddy current heating; electromagnetic fields; iterative finite difference scheme; losses in end region; nonlinear boundary value problem; turbogenerators;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1977.0065
