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Q. What is the flux density range that can be measured with a B-H analyzer?
A. Under sinusoidal excitation in the non-saturated region, the relationship between the maximum flux density Bm of the B-H curve and the induced voltage V2 is given by the following formula.
f: measurement frequency Ae: effective cross-sectional area of the specimen N2: number of turns of the secondary winding
Therefore, measurement can be performed over the Bm range corresponding to V2 within the voltage detection range of the B-H analyzer used in the non-saturated region. The maximum allowable V2 for the SY-8218 and SY-8219 is 200 V. Note that this formula does not hold under non-sinusoidal excitation or in the saturated region.
Q. What magnetic field (strength) can be excited by a B-H analyzer?
A. The maximum magnetic field Hm that can be excited is determined by the following formula.
I: excitation current N1: number of turns of the primary winding Le: mean magnetic path length
The excitation current depends on the power amplifier used.
