Kv. Namjoshi et al., EDDY-CURRENT POWER LOSS IN TOROIDAL CORES WITH RECTANGULAR CROSS-SECTION, IEEE transactions on magnetics, 34(3), 1998, pp. 636-641
In this paper, we investigate eddy-current power loss in toroidal core
s with a rectangular cross section. Are analytical method is used in w
hich the field variables are. expressed in terms of products of Bessel
functions and trigonometric functions. A closed-form expression is de
rived for the power loss. The influence of various parameters such as
skin depth and core dimensions over a wide range is discussed, Simplif
ied expressions far the power loss at special cases such as very small
and very large skin depths are provided, A comparison with measured v
alues is presented.