EDDY-CURRENT POWER LOSS IN TOROIDAL CORES WITH RECTANGULAR CROSS-SECTION

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.