Title :
Computation of 3-D open boundary eddy-current fields in large transformers using T, ψ-φm method coupled with GTM
Author :
Tang, Renyuan ; Hu, Yan ; Liang, Zhenguang ; Xie, Dexin
Author_Institution :
Res. Inst. of Special Electr. Machines, Shenyang Univ. of Technol., China
fDate :
3/1/2002 12:00:00 AM
Abstract :
Three-dimensional distributions of eddy-current densities and loss densities in metals near heavy current leads in a large transformer are calculated by using the T, ψ-φm method coupled with the geometric transformation method. The method is verified through TEAM Problem 21. The local overheating regions can be found out according to the point where the maximum of the loss density is. The loss densities in the ascending flange are analyzed at the different materials and thicknesses of copper screen
Keywords :
current density; current distribution; eddy currents; finite element analysis; losses; power transformers; 3-D open boundary eddy-current fields; GTM; T, ψ-φm method; TEAM Problem 21; ascending flange; copper screen; eddy-current densities; finite-element method coefficient matrix; geometric transformation method; geometrical transformation method; heavy current leads; large transformers; lead current; local overheating regions; loss densities; loss density; overheating; Building materials; Copper; Distributed computing; Electric potential; Finite element methods; Flanges; Laplace equations; Mathematical model; Power transformers; Steel;
Journal_Title :
Magnetics, IEEE Transactions on
