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Eddy-current power loss in toroidal cores with rectangular cross section

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3 Author(s)
K. V. Namjoshi ; Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada ; J. D. Lavers ; P. P. Biringer

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

Published in:

IEEE Transactions on Magnetics  (Volume:34 ,  Issue: 3 )