Calculation of the Energy Loss in Magnetic Sheet Materials Using a Domain Model

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Abstract
The energy loss resulting from eddy currents is calculated for magnetic sheet materials with a simple domain configuration. The domain model used is considered to be applicable for any induction up to saturation and for the frequency range up to that used in most electrical power applications. The eddy current losses have been calculated explicitly for the case of sinusoidal induction excitation, and expressed in terms of the ratio of domain wall spacing to sheet thickness. The results are in a form more suitable for quantitative comparison with measured values on materials, such as grain oriented silicon iron, than have been available.