Title :
Eddy-current power loss in toroidal cores with rectangular cross section
Author :
Namjoshi, K.V. ; Lavers, J. Douglas ; Biringer, P.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
5/1/1998 12:00:00 AM
Abstract :
In this paper, we investigate eddy-current power loss in toroidal cores with a rectangular cross section. An analytical method is used in which the field variables are expressed in terms of products of Bessel functions and trigonometric functions. A closed-form expression is derived for the power loss. The influence of various parameters such as skin depth and core dimensions over a wide range is discussed. Simplified expressions for the power loss at special cases such as very small and very large skin depths are provided. A comparison with measured values is presented
Keywords :
Bessel functions; eddy current losses; magnetic cores; skin effect; Bessel function; eddy current power loss; rectangular cross section; skin depth; toroidal core; trigonometric function; Closed-form solution; Coils; Conductivity; Current density; Magnetic cores; Permeability; Skin; Toroidal magnetic fields; Transformer cores; Wounds;
Journal_Title :
Magnetics, IEEE Transactions on
