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Effective parameters for toroidal cores based on nonlinear magnetization

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3 Author(s)
Nakmahachalasint, P. ; Dept. of Electr. Eng., Thammasat Univ., Pathumthani, Thailand ; Ngo, K.D.T. ; Vu-Quoc, L.

We propose a method to determine the effective parameters for toroidal cores. We have found the method effective in generating the initial flux-magnetomotive-force curve, as well as minor and major flux-MMF loops for a wide range of commercial toroids, using three commercial power manganese-zinc (MnZn) ferrites. In the method, a material-dependent function is used to approximate the initial magnetization curve. Material-independent, geometry-dependent expressions are then derived for the effective parameters. We compare initial-magnetization-based le and Ae with those published by core producers.

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Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 9 )