Needle-probe techniques for local magnetic flux measurements

摘要: Numerical two-dimensional field investigations in the cross section of laminated nonoriented electrical steel sheet are performed order to verify possibilities and limitations two needle-probe technique for measurement local magnetic flux near cutting edge. If one needles approaches lamination edge or when inhomogeneities present distribution along strip width due properties altered by procedure, then signal from needle probes no longer represents through a rectangular surface under because E-field components perpendicular surface. The calculated is compared actual passing corresponding correction factors as function position away computed. Depending on positioning method, can give an under- overestimation flux. Corrections 15% 80% necessary if distances about thickness considered. This work suggests iterative numerical procedure interpretation experimental data obtained measurements.