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Demagnetization factors of ringcores

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1 Author(s)
Clarke, D.B. ; Maritime Oper. Div., Aeronaut. & Mater. Res. Lab., Melbourne, Vic., Australia

The expression for the demagnetization of ringcores has evolved from the equation for the magnetic field inside simple-shaped objects whose magnetization is uniform. A modified expression that allows for the angular distribution of the magnetic field in the ringcore is developed from calculations for a infinite length tube. The modified expression is shown to provide a good fit to measured data. This modified equation is important when the product of the relative permeability and the demagnetization constant has a value around one or less

Published in:

Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 6 )