SU1220062A1 - Method of manufacturing isolated template coils for electric machines - Google Patents

Description

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The invention relates to a technology for manufacturing pattern coils with several turns on each coil, in particular high voltage stator coils for rotating three-phase motors of medium and high power and for linear motors with two-layer winding.

A known method of making a pattern coil for multilayer windings, in which individual turns in the groove parts are arranged one above the other, in the frontal parts is bent like a wall, so that in the middle of the frontal parts are located one next to the other, and they pile up and then converge so that in the other slot part again they are placed one above the other (GDR patent No. 50901, Cl. 21 d 51 ,, 1967

The known manufacturing method does not solve the problem of the formation of the frontal parts of the coils due to the formation of the frontal part of the winding when mounting the coils into the core. In addition, the ventilation is difficult, especially radial, and the winding is complicated, so. as each coil has its own special appearance and in the middle of the frontal parts all the coils are arranged with their edges one to another, which, in turn, is unfavorable for stability and insulation of the coil.

A known method of making isolated patterned coils for electric machines is the best solution of the invention, including winding the wire as a flat body onto a rotating template in two planes parallel to each other, insulating the frame that stabilizes it in shape, displacing the parallel the planes of the layers of the wire, the displacement of the sides of the coil, which are the lower and upper layers in the grooves, the molding of the straight parts of the coil in an inclined one to another position corresponding to the angle of the solution coils and molding of frontal parts (Zi-MiiH V.I. and others. Winding of electrical machines, - M,: Gosenergoizdat, 1961, p., 335-350).

Since upon receipt of short longitudinal dimensions of the wire and magnitude bending is formed narrowly, there is a danger of breaking the insulator 10

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wire and even damage to the conductor itself. In addition, such a narrow bend is unnecessary when the coil conductors are clinging. ; When insulating, the groove parts and areas of the frontal parts are mechanically wrapped with insulating material with scarlet, but the narrow bend is wrapped only manually.

The purpose of the invention is to avoid narrow bends at the coils and to provide a mechanical overlay of the insulating material on the coils without complicating the process of manufacturing the coils.

This goal is achieved by the fact that, according to the method of manufacturing insulating pattern coils for electrical machines, including winding the wire as a flat body onto a rotating pattern in two parallel planes one another, isolating the coil with subsequent stabilization: its shape, offset the parallel planes of the layers wires according to the displacement of the sides of the coil, which are the lower and upper layers in the grooves, forming the straight parts of the coil in an inclined one to another position, corresponding to the angle of the solution cat the lugs, and the shaping of the frontal parts, the offset of the parallel planes of the wire layers according to the displacement of the sides of the coil, which are the lower and upper layers in the grooves, are carried out by winding the wire on a template with two transitions from the plane to the plane in the middle of both frontal portions of the coil, the winding wire fed to the edge is held on the right when winding one plane, on the left when winding another plane and when forming transitions it is twisted alternately forward and back along the longitudinal axis 180 the lugs are produced continuously throughout the entire length, and the molding of the straight parts of the coil into an inclined one to another position, corresponding to the angle of the solution, is performed simultaneously with the molding of the frontal parts.

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Winding wire at the formation of research institutes of all subsequent for the first

on one side of the coil to the right, on the other side of the coil - to the left on the front

the blowing coil, and in transitions from one plane of winding to another, the winding wire is guided flat along the previous coil.

When insulating coils, the speed of operation of the belt-binding machine is reduced or the machine is stopped at the ends of the coil, the insulating tape is manually guided and raised above the ends of the coil.

Isolation of the ends of the coil is done manually, and then, with mechanical isolation, the elevation angle of the tape overlap is increased.

At the same time, in order to apply a greater thickness of insulation on the straight portions, the angle of lifting of the tape when smearing is reduced.

The invention is explained in more detail by the example of a four-pole three-phase asynchronous motor pa 1000 kW, 6000 V.

The motor has a two-layer winding consisting of single-disk template coils with six turns on each coil. The coils are insulated with micalentum, which already contains the required amount of binder material in the form of a thermally hardening epoxy resin.

FIG. Figure 1 shows the front part of the proposed pattern coil, after being insulated prior to final volumetric molding, suitable for linear motors; an axial front view of FIG. 2 - the same, radial view from above; in fig. 3 - execution of the ends of the coil.

The template coil consists of straight parts 1 and 2 and front parts 3. The parallel straight parts to each other are located in two planes that are offset from each other to a clear light distance of 50 MI :. The cross section of the coil is 30-10 mm. The frontal parts of the coil are spiral-shaped in an arc of 180 °, curved around an imaginary straight cylinder 4 with a diameter of 50 mm. When volumetric molding of the coil, the straight cylinder 4 passes into a segment of a circular cylinder, the arc of the coil-shaped portion of the coil increases by more than 180, and both straight portions are located corresponding to the angle of the coil solution. One horse 5 of the coil at its beginning superimposed along the spiral-shaped portion of the frontal

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Part 3 coils to the other end 6 coils. The advantage of this is that when mechanically applying an insulating tape, an automatic 5-screen isolation process needs to be stopped only once in each layer of tape so that the insulating tape is manually guided and raised above the ends of the coil. Have

(There is no longer a narrow curvature of this coil. Thus, the danger of damage to the insulated conductors during the manufacture of the coils is eliminated. The length of the conductors is shorter,

15 since there are no narrow bends of the eyes at the coil, two-sidedly axially following along other curved sections of the coil, the arc, usually realized in the eyes, here is in the form of a spiral laid by other arcs. At the same time, the coil overhang is reduced, which, in turn, entails a reduction in the length of the entire machine. In addition, the absence of all narrow 25 bends allows continuous mechanical insulation with an insulating tape on a tape wrapping machine. Such a machine can work with optimal efficiency.

jg, since the coil is flat when insulated. Complicated hand-wrapping completely disappears and the working conditions are improved, since touching the adhesive insulating tape with health-related uncured epoxy resin and solvent occurs only at the ends of the coil.

The coil is made by winding

 in the form of a flat body. Corresponding to the average displacement of both sides of the coil (lower and upper layer) by 80 mm at a clear distance of 50 mm, the winding planes are also shifted.

 winding pattern. The wire is supplied to the edge and bends to the edge in the zone of the frontal parts of the coil. When winding the first coil, the wire is supported by a winding pattern,

50 then this task is performed respectively by the previous turn. During the formation of transitions from one winding plane to another, the supplied wire is twisted around its

55 longitudinal axis 180, and with a different direction of twisting on both frontal parts. At the same time, the wire is shifted

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from one to the other plane of the winding, constituting the first turn coil 58j {mm (thickness of the winding wire plus double insulation thickness, iirooc offset 50 mm) and increasing by twice the thickness of the wire with each further turn. By simultaneously twisting the wire of the winding wire and displacing the ends of the pattern, the wire gets a spiral shape and forms a free volume, which includes a 50 mm diameter. The next coils are layered flat on top of each other so that the entire coil around this imaginary cylinder. Now, in some places, the coil is tied up with a tape so that it does not disintegrate, and after this, the coil is tapered onto a zshayush, and the machine is continuously wrapped with insulating tape with an insulating tape. At both ends, which are in the same place, the tape-wrapping machine must operate at a slow speed, which allows you to manually raise the insulating tape over the perpendicularly protruding ends of the coil. The downturn head is fed in transitions from one winding band to another. When wrapping the grooves, the elevation angle of the wrapping is reduced. Insulating tape laid in a semi-gloss over the frontal parts x5 is applied more densely, which increases the thickness of the insulation and lengthens the creepage distance. At the same time, the insulation of the slot parts is thicker. than the insulation of the frontal parts, which is achieved without an additional layer of insulating tape 1, After finishing the insulation of the flat coil, the direct parts: the coils are inserted into the heated press, heated, pressed to the required size and cooled (stabilizing the shape). Finally, a flat coil is put into a traditional tire 5 / to unclamp and form a coil, and if the coil unwrapping process is abandoned, it is clamped with its straight parts and obtains its final volumetric shape. In case of refusal from the process of unclamping, strong deformations and related Damages do not occur. In this case, the main advantage of optimum isolation of the coils in the flat form with the help of band breaking machines is achieved. The horizontal spruce winding pattern consists of two interconnected wooden halves, each for one side of the coil. They are provided with radial and axial axes for the winding wire. Both halves are axially displaced one to the other, at the right half of the axial guide - to the left, at the left - to the right. The magnitude of the displacement such

In the case of axial guides, it reaches 50 mm in the case of the pattern coil of this example. In the lobovk parts, both halves of the template provide a tangentially free space of 100 mm, necessary for the formation of spiral-shaped sections of the frontal parts of the coil. The pattern drive rotates a slit-shaped guide wire consisting of two pairs of rollers perpendicular to each other. Such a winding device is only slightly more complicated than the same conventional needle or fish catheter, and provides

without significant additional costs for the manufacture of the proposed pattern coils,

It is recognized by the invention according to the results of the examination carried out

Department of Invention DD /

J i

FIG. 3

Compiled by V.Pshpsina Editor N.Gunko Tehred o.Sopke

Order 1328/57 Circulation 631 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

. Fi. Z

Proofreader V.Sinitska

Claims (5)

I. METHOD FOR PRODUCING INSULATED TEMPLATE REELS FOR ELECTRIC MACHINES, including winding the wire as a flat body on a rotating template in two planes parallel to one another, insulating the coil with its subsequent stabilization in shape, shifting parallel planes :: wire layers according to the offset of the sides of the coil, which are " lower and upper layers in the grooves, forming the direct parts of the coil in an inclined position to one another, corresponding to the angle of the solution of the coil, and forming the frontal parts, · characterized in about the offset of the parallel planes of the layers of the wire, respectively, the displacement of the sides of the coil, which are the lower and upper layers in the grooves, is carried out when winding the wire on the template with two transitions from a plane to a plane in the middle of both frontal parts of the coil, while the winding wire supplied to the edge when winding one plane is carried out on the right, when winding another plane - on the left and when the transitions are formed, it is twisted along its longitudinal axis 180 alternately forward and backward, the coil is insulated continuously throughout length, and the molding of the direct parts of the coil in an inclined position to one another, corresponding to the angle of the solution of the coil, is carried out simultaneously with the molding of the frontal parts. 2. The method according to π. 1, characterized in that the winding wire in the formation of all subsequent turns after the first turn of the coil is laid on one side of the coil to the right, on the other side of the coil to the left of the previous turn, and in transitions from one plane of the winding to the other, the winding wire is directed flat along the previous turn. 3. The method of pop. 1, characterized in that. When insulating the coils, the speed of the tape wrapping machine is reduced or the machine is stopped at the ends of the coil, and the insulating Tape is manually guided and raised above the ends of the coil. 4. The method of pop. 3, characterized in that the insulation of the ends of the coil is done manually, and then, with mechanical isolation, the angle of elevation of the application of the tape is increased. 5. The method according to π. 1, characterized in that in order to impose insulation of greater thickness on the straight parts, the angle of elevation of the tape during winding is reduced. Ct _ $ q 1220062 12.20062