Title :
Computing ferrite core losses at high frequency by finite elements method including temperature influence
Author :
Ahmed, Beena ; Ahmed, Boucetta ; Guy, Grellet
Author_Institution :
Lab. d´´Electrotech. et d´´Electron. de Puissance, Univ. Claude Bernard, Villeurbanne, France
fDate :
9/1/1994 12:00:00 AM
Abstract :
A finite elements method coupled with the Preisach model of hysteresis is used to compute the ferrite losses in medium power transformers (10-60 kVA) working at relatively high frequencies (20-60 kHz) and with an excitation level of about 0.3 Tesla. The dynamic evolution of the permeability is taken into account. The simple and doubly cubic spline functions are used to account for temperature effects respectively on electric and on magnetic parameters of the ferrite cores. The results are compared with test data obtained with 3C8 and B50 ferrites at different frequencies
Keywords :
ferrite devices; finite element analysis; high-frequency transformers; magnetic cores; magnetic hysteresis; magnetic permeability; power transformers; splines (mathematics); transformer cores; 0.3 T; 10 to 60 kVA; 20 to 60 kHz; 3C8 ferrites; B50 ferrites; Preisach model; cubic spline functions; dynamic evolution; electric parameters; excitation level; ferrite core losses; finite elements method; high frequency; hysteresis; magnetic parameters; medium power transformers; permeability; temperature effects; Core loss; Ferrites; Finite element methods; Frequency; Magnetic cores; Magnetic hysteresis; Permeability; Power transformers; Spline; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
