SU79651A1 - Differential electrodynamic system to determine the magnetic loss of ferromagnetic materials - Google Patents

Description

Differential electrodynamic system devices for determining magnetic lotteries of ferromagnetic materials during magnetic reversal are known.

The described device differs from the known ones in that the movable frame is formed from two oppositely included turns, inside one of which is put this etalon sample, and the subject is inserted inside the other.

FIG. 1 shows a schematic longitudinal section of the tool; in fig. 2-three projections of the moving frame.

The magnetizing coil 1, located on the ebony frame, creates a uniform magnetic field; the coil is powered by an alternating current of 50 Hz.

In the coil field, the subject is educated. 2 and reference sample 3 of ferromagnetic material. Which are covered by measuring frame 4.

The measuring frame represents co6oii two elongated turns a and b, connected by a figure eight, i.e. towards it. “The eight in the place of skrenshvani turns is bent in the form of 6yKiibi Y (in plan); the crossing point is insulated. The subject and this sample pass through the corresponding turns of the frame. The frame is suspended on a metal elastic filament 5 and is shielded from electrostatic influence on an magnetized tubule 1 with a brass truss-shield 6, equipped with a longitudinal slit to prevent the appearance of Foucault currents.

If the magnetic tray in the test sample is different from the magnetic flux in the reference sample, then a current appears in the frame.

 79651--2-

As is well known, the strength of the magnetic field in the air at a surface-ferromagnet is equal to the intensity inside it, since the tangential components of the magnetic field strength at the surface of the section are equal.

The interaction of the current in the frame with the magnetic zero at the surface of the samples will cause the deviation of the instrument frame. The angle of deviation of the frame will be ironically equivalent to the difference of the magnitude loss during non-magnetisation in the test and reference samples. The frame angle is counted using mirrors a. 7.

Subject invention

A differential electrodynamic device for determining the magnetic losses of ferromagnetic materials during remagnetization, which also means that, in order to determine the difference between the magnetic notes of the measured and reference samples, the moving frame of the iribor consists of two mutually connected turns, inside each of which, respectively, are inserted reference and measurable samples.