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DC magnetic field sensor employing multifield eddy-current effects

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2 Author(s)
Kaplan, B.-Z. ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel ; Rabinovici, R.

An eddy-current sensor for DC and low-frequency magnetic fields is treated. It is based on a direct application of eddy-current effects in nonlinear ferromagnetic conductors, in the presence of several alternating magnetic fields of different frequencies (multifield eddy-current effects). The one-dimensional multifield eddy-current effect is examined to elucidate the principle of operation of the sensor. The transduction gain of the sensor is evaluated, using a simplified model of its operation. Experimental results confirm the applicability of the model and demonstrate a sensitivity of 0.1 nT

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Magnetics, IEEE Transactions on  (Volume:24 ,  Issue: 1 )