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The inverse problem methodology for the measurement of the permeability of the ferromagnetic materials

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1 Author(s)
Fouladgar, J. ; Lab. de Recherche des Tech. Inductives, CRTT, St. Nazaire, France

The inverse problem methodology is used to evaluate the permeability of the ferromagnetic materials from the measurement of the impedance of a sensor. The linear case is studied by a harmonic A-V formulation of the Maxwell equations. The nonlinear case is elaborated by a first harmonic equivalent permeability. The Nelder-Mead simplex search method is then used to solve the inverse problem. To obtain the best operating frequency of the installation, the sensitivity of the sensor is calculated as a function of the frequency

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 2 )