Finite element and finite difference analysis of losses in laminated material

Eddy-current losses in laminated ferromagnetic material are computed, using the finite-element and finite-difference methods. The excitation is periodic with only one component, and the theoretical development uses a quasistationary analysis in which only the planar component is considered in the laminated stack that is exposed to the time-varying field. Good agreement is found between analysis and test results for tooth ripple loss in the pole face of an alternator.<
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