SU423072A1 - COIL FOR MEASUREMENT OF PARAMETERS OF MAGNETIC CORES - Google Patents

Description

one

The invention relates to the field of measurement technology and can be used to convert electromagnetic parameters into electrical circuit parameters and is intended to measure the characteristics of composite magnetic circuits of various sizes and purposes in laboratory studies and industrial output.

Known all-in-one coils used as converters of electromagnetic parameters of composite magnetic circuits of various shapes and sizes into electrical circuit parameters. However, such measuring coils placed at the time of the measurement in the inner cavity of the tested magnetic circuit do not provide the required reproducibility due to variations in the relative position of the coil and magnetic core, as well as due to the breakdown of the insulation of the measuring conductors (conclusions) and damage to the structural parts fixing the coil in the desired position. These drawbacks appear when measuring the characteristics of cores from armored ferrite in microminiature form.

The proposed measuring coil differs from the known one in that, in order to increase the stability of its own parameters, the primary (current) winding

made in the form of a rigid electrode and a tape electrically conductive material and at the same time is a constructive basis for the secondary (measuring) winding and protecting it from the abrasive action of the tested magnetic core.

FIG. 1 shows the electrical circuit of the measuring coil; in fig. 2 is the same general view; On fng. 3- design elements.

The windings of the measuring coil 1 and 2, one of which 1 - primary (current) is the source of a magnetic field of a given configuration, the other 2 - secondary (measuring), are located in the internal cavity of the magnetic circuit 3. By conclusions 4 and 5 of windings 1 and 2 can be a coil 6 with adjustable mutual inductance is connected, which allows to achieve a zero coefficient before the placement of windings 1 and 2 in the magnetic core

transmissions between terminals 7, 8 of the primary winding circuit and terminals 9, 10 of the secondary circuit.

The placement of the windings 1 and 2 in the test magnetic core causes an output signal,

determined by the properties of the magnetic circuit.

The primary winding 1, whose configuration is shown in FIG. 2, contains a groove And made along the entire billet of the primary winding, which has dimensions sufficient

for placing in it a secondary (measuring) winding, made as an insulated wire.

In terminals 4 and 7 (fig. 2) of the primary winding, the groove 11 is selected on one side, in the actual winding 1 — the electrode — from the opposite side. The transition of the secondary winding from the electrode 1 to the terminals 4, 7 is carried out through the holes or slots 12. Between the terminals 4 and 7, the dielectric 13 is bent, and the current electrode 1 is fastened with a metal ring 14 having a notch 15 (Fig. 3) according to the size of the leads 4 and 7, which is an element of additional protection of the secondary winding 2. The introduction of an insulating ring 16 between the electrode 1 and the metal ring 14 makes it possible to make a hollow groove 17 in the ring 16 and thereby significantly increase the strength of the coil. There are several options for placing the secondary winding 2 on the current & lektod "-1, in the groove, made around the inner side of the electrode 1, i.e. on the same side as the terminals 4 and 7; and in the groove on the front side of the electrode.

In addition, on the electrode 1, the dimensions of the groove II (Fig. 2) can be chosen sufficient for making the secondary winding 2 (Fig. 1) in the form of a multi-turn. It is possible to make several slots to accommodate several galvanically unrelated windings 2.

Subject invention

A gauge for measuring the parameters of magnetic hearts, for example, composite and irregular m, containing a primary winding in the form of an open coil with leads, made of electrically conductive tape material, and a secondary winding, characterized in that, in order to increase the stability of its own parameters and

reliability, along the perimeter of the primary winding there is a groove in which one is placed and secured, and at least one secondary winding.

  - And /

FIG. 2