SU1654928A1 - Method of manufacture of squirrel-cage rotor with two- layer magnetic core - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is the simplification of manufacturing technology and the improvement of quality. Lined packages 1 and 2 are assembled into a single package, ensuring that they can rotate relative to each other along the surface of the connector. The upper groove 3 of the outer part is set against the groove 4 of the inner part of the magnetic circuit. The whole-closed winding blanks are made of flexible metal foil with a longitudinal notch in accordance with the geometry of the two-layer winding rods, its frontal joints 7 and 8 and the shape of jumpers 9 forming the fan blades. After installation, the workpiece is produced by force 00 CO yu 00

Description

Howling reversal of the layers of the magnetic package. In the course of a turn, the necessary shaping of the whole-closed winding sections and the formation of rotor fan blades take place. The magnetic circuit is fixed in the position of maximum magnetic conductivity. 4 il.

The invention relates to asynchronous electric machines, in particular to the technology of manufacturing a short-circuited rotor with a two-layer magnetic circuit, and can be used in the production of asynchronous electric motors, mainly of low power.

The aim of the invention is to simplify the manufacturing technology and improve the quality,

FIG. 1 shows a short-circuited rotor, a section, FIG. 2 - a flat billet of a single-turn section of a winding with a longitudinal notch; in FIG. 3 — two options for terminating the sharpening of a winding; in FIG. after turning the layers of the magnetic circuit

The method of manufacturing a composite rotor with closed grooves and a two-layer multi-phase short-circuited winding without casting is carried out as follows.

The sufficiently rigid components of the magnetic core, made by any method (for example, laminated bags 1 and 2, glued together or fastened with studs) are assembled into a single package (Fig. 1), while ensuring technological freedom of their rotation relative to each other along a cylindrical (or conical) frame. a) the surface of the connector, and set the package of the magnetic circuit to the initial position of the upper groove 3 against the groove ° 4 of the internal part of the magnetic circuit (a tooth against the tooth). In necessary cases, traditional slotted insulation is inserted into the closed grooves.

All-closed winding blanks (Fig. 2) are made quite flexible from one or several layers of metal foil (aluminum, copper) with a longitudinal notch in accordance with the geometry of the rods 5 and 6 of the two-layer winding and its lobo

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outlets 7 and 8, taking into account the selected form of jumpers 9 (Fig. 2, 3), forming the blades of the rotor fan. The electrical insulation of the workpiece is carried out in any known manner - oxidation, coating with insulating varnish, etc. At the same time, the cross-section of insulated blanks should be similar to the form of grooves 3 and 4 of the outer and inner tees of a two-layer magnetic core and slightly smaller in size, providing a subsequent technological operation — placing the blanks in all closed grooves 3 and 4 from the end of the magnetic core.

After installing the workpiece and aligning it, the layers of the magnetic core package are inserted with the workpieces inserted into its closed grooves 3 and 4 at an angle corresponding to the pole division of the machine, taking into account the required shortening of the step, while in the process of reversal, the whole-closed single-turn sections of the rotor winding are formed with deformation of frontal connections 7 and 8 (Fig. 4) and the formation of rotor fan blades. Next, the structure is fixed by any known method (gluing, compounding, mechanical devices in the rotor body, etc.), while it is necessary to ensure fixation of the composite magnetic circuit in the position of the maximum magnetic conductivity of the toothed layer (tooth against tooth).

The proposed method of manufacturing a short-circuited winding eliminates the need for hot casting, which, together with improved processability, reduced consumption of conductive material (mainly aluminum), expands the possibilities of machine geometry variation, for example, increasing the active length of the rotor, including when using copper winding . In principle, this method of manufacturing a winding can

to be extended for the manufacture of windings of a double-layer stator with closed grooves when using instead of whole-closed single-turn billets of a spooled multi-turn coils. It is also obvious that it is possible to apply the proposed method for manufacturing a winding in closed grooves of a composite waste-free magnetic conductor for linear electric motors of both the rotor and the stator.

Claims (1)

Invention Formula A method for manufacturing a short-cranked rotor with a double-layer magnet duct, in which grooves are radially opposite to each other in the inner magnetic conduit on the outer surface, in the outer magnetic conductor on its inner surface. five 0 They use a two-layer multi-phase short-circuited winding with frontal parts and form fan blades, characterized in that, in order to simplify manufacturing technology and improve quality, each turn of the winding is made of a sheet material blank with an applied insulation layer. the blank is made a longitudinal notch corresponding to the length of the half-turn, and installed from the end into the grooves of the magnetic conductor, align the overhangs of the frontal parts, then turn the layers of the magnetic core relative to each other to tangeness The fan blades from the connecting layers of the windings of jumpers 8 form the angle direction corresponding to the pole division, and then the windings are fixed in the magnetic core. Phi% 1 tt Thebes. 2 0U9.3