SU754577A1 - Electric machine slotless winding - Google Patents

Description

The invention relates to electrical engineering, in particular to the windings of ungasked stators of electrical machines.

The winding of an ungasked stator of an electric machine, made of tape foil placed in packages of a stator magnetic circuit, arranged in parallel [ί] is known. Winding is used in single-phase asynchronous motors. In these engines, between the packages of the magnetic circuit of the ungasked stator with the working winding of tape foil, there are packages with a starting winding, the conductors of which are made of round wire.

A disadvantage of the known technical solution is that the working and starting windings are performed in 20 different ways, in addition, reduced use of the active volume of the stator.

Also known is a winding of an ungassed stator of an electric machine, made of ribbon foil and having active and frontal parts [2].

Such a winding is closest to the invention by its technical essence, ^ is located in packages without gas

2

the stator, and in the sector-like gaps formed by the sides of these packages, the starting winding is placed of round conductors. The use of the active stator volume of such a technical solution is higher, however, the working and start windings are also carried out in various ways, and the use of tape foil winding is possible only in the case of a single-phase motor. These drawbacks are due to the complexity of molding the frontal winding parts of the tape foil to the curve.

The purpose of the invention is to simplify the technology of forming the frontal parts of the ^; hanks.

The goal is achieved by the fact that the foil at each turn of the winding at the transition from the active to the frontal part is made with a bend of 90 °, and the sections before and after the bend are aligned and form a right triangle, the hypotenuse of which is the line of bend, while curve shape.

Figure 1 shows a winding section.

zero-phase electric stator

cars with straight frontal parts;

3

754577

four

FIG. 2 is the same, with curved frontal parts; on fig.Z - section of the transition of the active part of the winding

in the frontal part, curved along the curve;

figure 4-coil winding._

The winding of the unstressed stator of an electric machine, made of ribbon foil 1) has active 2 and frontal 3 parts. During the transition from the active part to the frontal foil, it bends by 90 °, the foil areas before and after the bend are combined and form a right triangle 4, the hypotenuse of which is the line of bend.

Ferromagnetic plates 6 are superimposed on the active parts of each coil of the winding. Each subsequent coil of the winding, together with the ferromagnetic plates, is laid on the previous one, forming a package of the gas-free stator with a winding coil. Then the frontal parts are molded in a curve to obtain the desired shape of the coil.

Each turn of the coil can be immediately attached to the winding final shape using the necessary template.

In all cases, apply prior! insulated foil and ferromagnetic plates. Insulation can be film, oxide, lacquer.

The length of the ferromagnetic plates should not be longer than the length of the active parts of the coil winding, and the ferromagnetic plates should not be superimposed on the aligned foil areas where it is bent. As a result, voids in the active part of the gapless stator are eliminated.

The invention can be used in multiphase electric machines, since under the front parts of one coil can pass more active parts of other coils. The active parts of the winding at the expense of the corresponding bend of the front parts can be installed in the stator package at any angle to each other depending on the number of poles cars.

The difference between the coils of the winding from each other depending on the number of poles of the machine is only in the length of the lobo.

^{1 The} proposed winding of an ungassed stator of an electric machine allows you to radically simplify the technology of forming the frontal parts, makes it possible to increase the use of

15 active stator volume and expand the scope of such windings of non-stator stator to multi-phase electrical machines.

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Claims (1)

Claim The winding of the unstressed stator of an electric machine, made of tape foil and having active and "frontal parts, which are similar to the fact that, in order to simplify the technology of forming frontal parts, the foil on each turn of the winding when moving from the active part to the frontal part is performed on 9090 bend, and the sections before and after the bend are aligned and form a right triangle whose hypothesis is the kink line, while the frontal winding parts 35 have a curved shape.