SU855864A1 - End-face electric machine magnetic core - Google Patents

Description

I

The invention relates to electrical engineering, specifically to magnetic conductors of AC electrical machines.

There are various designs of magnetic cores of electrical machines, for example, in the form of a torus,

wound from electrical steel, and the grooves obtained by mechanical or physico-chemical; The twisted tape magnetic cores are usually made of electrically-produced electrical steels in order to obtain the best electromagnetic characteristics f 1.

However, in such magnetic cores, the magnetic flux directed along the PM coincides with the magnetization line, but the magnetic flux enters and leaves perpendicular to this line and the magnetic anisotropy of these steels is large, therefore the jog zone is in the worst conditions. Magnetic anisotropy of steel leads to an increase in

The detection of losses in steel and magnetizing current. Such a structure has a large amount of electrical steel waste.

The purpose of the invention is to save active materials and increase energy indicators.

This goal is achieved by the fact that in the known magnetic core of the end electrical maine containing a rome made of steel tape and a dentate zone, the latter is made of a tape with radially arranged corrugations, which are folded fanlike in a ring, with the grooves formed by the corrugations facing the open part of the tape.

Figure 1 shows the rotor end of the electric machine; in Fig.2 the stator of the mechanical electric machine; on fig.Z and 4 - grooves with a winding.

The magnetic circuit of the electrical end machine contains a PMO I, made in the form of a multi-layer roll twisted from a steel tape, and a tooth zone 2, made of a steel tape with radially arranged corrugations, inside which is placed a winding. Steel tape, bent in the form of corrugations, rolled into a ring like a fan, the sharp ridges of which face the rym. In addition, to facilitate folding of the corrugated tape into a ring, special technological cuts in the form of a wedge are provided on the periphery of the ridges. The magnetic circuit can be one-sided and two-sided depending on. constructions of butt electrical mapine. Coping rings 3 (Fig. 1 are common to both sides of the rotor and that No. 1M attach the teeth to the bushing. This design of the rotor provides a high rigidity of the structure, which is of great importance for face machines because of the significant forces magnetic attraction. In this way, it becomes possible to sew the air gap and improve the energy of the electric machine.

This design of the magnetic circuit is quite applicable and d.p Sta.tora. . However, in this case, the magnetizing winding is made of separate sections 4, laid around the chassis (see Fig.2.} In special insulating grooves 5 Sfig.Z). After laying the windings of all phases and poles, toothed distributed magnetic zones are superimposed on the sides.} The fastener is made using impregnating varnishes, adhesives, and companies. 7) The winding sections are electrically connected to the required circuit on the outer diameter of the stator. Such a winding has very limited frontal parts, Tafc as there are no percodes on the side of the inner diameter. which saves scarce copper by 10-15%. The stator disc has a high mechanical strength, is very togic and its manufacture can be easily automated.

Before assembling the stitch disk, the stator and rotor disc must be compressed and, thus, imparted the necessary strength to the end parts and grind to obtain a thin film on a wide ridge of corrugations (Fig. 3). This operation is necessary for the above mapping characteristics (the Carter coefficient is reduced), since these areas are over-saturated and the thin steel film becomes magnetic-transparent for magnetic flux.

Thus, the described invention allows, firstly, to achieve high utilization of the active material - electrical steel without waste, and winding copper to save 10-15%, and secondly, to automate all processes, and therefore, the labor intensity of manufacturing is reduced several times. thirdly, to unify the magnetic cores

stator and rotor, which leads to savings in tooling and

equipment, in the fourth, to increase power due to the high utilization of the active part, as well as to improve the energy parameters of the mass one by attaining the uniformity of the air gap.

Claims (1)

Invention Formula The magnetic circuit of the frontal electrical machine, containing a 1МRM twisted steel strip and a dentate zone, which is different. by the fact that, in order to save active materials and increase energy indices, the cilia zone is made of a tape with radially arranged corrugations, rolled into a ring like a fan, with the grooves formed by the corrugations facing the rim of the open part. Sources of information taken into account in the examination 1, Electrotechnical production technologists, 1975, No. 11, pp.7-8.