UA62647A - Insert for the magnetic core of an electrical reactor - Google Patents

Abstract

The proposed insert for the magnetic core of an electrical reactor contains a stack of electric steel strips that are bond with adhesive, an insulating plate, and a binding. The gap between the insert surface and the insulating plate is filled with adhesive.

Description

Description of the invention

The invention belongs to the field of electrical engineering and can be used in the construction of dry smoothing 2 reactors.

There is a well-known method of gluing a package of metal plates (see German patent Mo246109; 21 a2, 48; 1964), which is used for the manufacture of transformer cores, chokes and similar induction devices, which consists in the fact that the metal plates are first loosely folded into a package and in such a way condition, they are impregnated with adhesive, then the package is clamped and heated to harden the adhesive. At the same time, for fixing and crimping 70 charged bags, a tape is used that shrinks under the influence of heat.

The disadvantage of the known method is: increased labor costs of manufacturing the core; high costs of adhesive mass; the presence of energy costs for heating to harden the adhesive mass. 12 A known method of manufacturing transformer cores (see British patent Mo1118387; NOTES/00; 1967), according to which a sheet of steel is cut into plates of different and equal widths, the length of which is equal to the total length of all rods and yokes. The plates are placed one on top of the other, and then filled with epoxy resin so that a solid block is formed, from which the rods and yokes are then cut. The disadvantages of the known method are: increased heating of the magnetic wire due to the presence of burrs when cutting rods and gaps of the required length, or additional costs for eliminating burrs; high costs of adhesive mass; the presence of energy costs for heating to harden the adhesive mass.

A plate magnetic core for induction devices is known (see British patent Mo1326766; HO1E27/26; 1970; US priority from 1969), which consists of a package of ferromagnetic plates with deformed edges of the long sides, between which gaps are formed. On the side of the bag, where the deformed edges protrude, a coating of thermosetting resin is applied, part of which penetrates into the cracks. After that, the resin is subjected to vulcanization. Before applying the coating, the package of plates is tightened with bandages, which are removed after the vulcanization of the resin.

We take the well-known magnetic core for induction devices as a prototype. in

The disadvantages of the known plate magnetic core are the insufficient mechanical connection of the plates in the rod, which leads to an increase in vibration and, accordingly, to an increase in the noise level. The same energy costs for vulcanization of thermosetting resin remain. eh

The basis of the invention is the task of developing an insert for the magnetic wire rod of an electric reactor, which ensures ease of assembly, reduction of labor costs and costs of adhesive epoxy compound, exclusion

From energy costs for its hardening. at

The solution to the problem is provided by the insert of the core of the magnetic wire of the electric reactor, which consists of packages of strips of electrical steel, fastened with an adhesive compound, an insulating strip and a bandage due to the fact that the gap formed by the side stepped surface of the insert and the insulating strip is filled with an adhesive compound. At the same time, the package strips have a rolling direction along the axis of the insert, the height Z of the insulating strip exceeds its height, and the gap formed by the side step surface of the insert and the insulating strip is filled with a cold-hardening epoxy compound. with" Technical result achieved when using the invention: simplified manufacturing technology and reduced labor costs; there are no energy costs for hardening the adhesive compound.

The claimed insert of the magnetic wire rod of the electric reactor is explained by the following description and drawings, where: Fig. 1 is a side view of the magnetic wire rod insert of the electric reactor,

Fig. 2 - a top view of the insert of the magnet wire rod of the electric reactor. b According to the invention, the insert of the core of the magnetic wire of the electric reactor consists of packages 1 (see Fig. 1, "Iz" 20 Fig. 2) strips of cold-rolled electrical steel, which successively decrease in length and the number of strips in them as they move away from its center. The insert has a stepped, close to round, perimeter. tm On the side surface of the insert, an insulating strip 2 is installed, and then an external bandage C made of glass tape.

The insulating strip 2 overlaps the steps of adjacent packages 1, forming channels 4, which are filled with an adhesive compound. To limit the overflow of the adhesive compound, the insulating strip 2 has a height that exceeds 29 the height of the insert (see Fig. 1, Fig. 2). Shimming and subsequent screeding of the inserts are performed in a technological detachable in. ring device (not shown), which is installed on the ends of the insert. After tightening the insert, the inner brace (not shown) is installed and the tightening device is dismantled. Next, an insulating strip 2 is installed, for example, made of fiberglass, which is clamped with an external bandage 3. After that, the channels 4, formed by the side step surface of the insert and the insulating strip, are filled with epoxy 60 compound of cold hardening. To reduce the heating of the packages outermost from the center of the circle, the latter have cuts into which electrical insulating pads 5 are installed.

In the declared design of the magnetic core insert of the electric reactor, the magnetic flux is directed along the rolled steel, which reduces losses in the magnetic core and its heating.

The insertion of the core of the magnetic wire of the electric reactor allows: to simplify the manufacturing technology and reduce the labor intensity;

to save the compound, which is expensive; eliminate energy costs for hardening the adhesive compound.

Claims (4)

2 Formula of the invention 1. The insert of the core of the magnetic wire of the electric reactor, which consists of packages of strips of electrical steel, fastened with an adhesive compound, an insulating strip and a bandage, which is distinguished by the fact that the gap formed by the side stepped surface of the insert and the insulating strip is filled with adhesive /o0 / Hompound. 2. Insert according to claim 1, which differs in that the height of the insulating strip exceeds the height of the insert. Q. The insert according to claim 1, 2, which differs in that the package strips have a rolling direction along the axis of the insert. 4. The insert according to claim 1, which differs in that the gap formed by the side stepped surface of the insert and the insulating strip is filled with a cold-hardening epoxy compound. « in « (Se) with (Se) - and? (o) name) (o) sh» that 60 b5