Title :
A new formulation of anisotropic equivalent conductivity in laminations
Author :
Jian, Wang ; Heyun, Lin ; Yunkai, Huang ; Xikai, Sun
Author_Institution :
Sch. of Electr. Eng., Southeast Univ., Nanjing, China
Abstract :
A new and simple formulation of equivalent conductivity in the direction normal to the laminations is derived by analyzing and comparing the electromagnetic fields and the eddy current losses in a laminated iron core and a single lamination. Then the anisotropic conductivity tensor is updated. The conductivity formulation can make it easier to calculate numerically three-dimensional eddy current fields in laminations with good accuracy. The validity of the formulation is verified by comparing the eddy current losses, computed with the finite element method using the proposed conductivity formulation and the long known formula, in an analyzed model.
Keywords :
eddy current losses; electrical conductivity; electromagnetic fields; finite element analysis; laminations; magnetic cores; anisotropic conductivity tensor; anisotropic equivalent conductivity; conductivity formulation; eddy current fields; eddy current loss; electromagnetic field; finite element method; laminated iron core; single lamination; Anisotropic magnetoresistance; Conductivity; Eddy currents; Finite element methods; Frequency; Iron; Lamination; Magnetic cores; Tensile stress; Transformer cores;
Conference_Titel :
Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-7059-4
DOI :
10.1109/CEFC.2010.5481776
