SU1314419A1 - Method of manufacturing magnetic circuits for electric machines - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to the technology of manufacturing the magnetic cores of rotors and electric motors. The purpose of the invention is the expansion of technological capabilities through the manufacture of magnetic cores with various degrees of opening of the groove. In the belt 1, the grooves are extruded by punching, the belt is bent on the edge with the arrangement of the teeth 2 on the outer side of the pas .J,,. / g t /, /, - "/. . 1 t ICG 20 Z2 keta and fasten the bag by welding. The grooves are made at a distance from the edge of the tape, corresponding to the height of the tooth crown in the area of the tooth. With a pitch equal to two teeth divisions, T-shaped cuts are made with the formation of crowns, and after the package is attached, the teeth 2 with crowns are deposited in the radial direction. With an even number of teeth in the magnetic core of teeth 2 of greater height and teeth 3 of smaller height, the same number. Moreover, teeth 2 are made with double-sided crowns 4 and 5 with a maximum tooth width along the crown equal to two tooth divisions on the straight belt 1, teeth 3 are made without crowns. In this case, the punching of the tooth-groove zones and the bending of the tape onto the rib are made from a continuous tape in the form of a continuous spiral magnetic circuit. After the precipitation of the teeth, a magnetic core with half-closed or closed grooves is obtained. 10 il. (L with 5 J / 4: o (rig.G

Description

one

The invention relates to electrical engineering, in particular to the technology of manufacturing the magnetic circuits of rotors and electric motors korea.

The purpose of the invention is the expansion of technological capabilities through the manufacture of magnetic cores with various degrees of opening of the groove.

FIG. 1 and 2 depict tapes containing a series of dentate-groove zones made by stamping; FIGS. 3 and 4 show blanks for the magnetic cores, respectively, with half-closed and closed-loop grooves with an even number of slots after bending the ribbon per edge j in FIG. 5 and 6 — parts of the magnetic cores obtained from the blanks of FIG. 3 and 4, respectively; in fig. 7 - section of the package along the teeth with crowns before the operation of the precipitation of the teeth; in fig. 8 and 8a are variants of the precipitation of teeth j in FIG. 9 is a strip of measured length after stamping for an embodiment of a magnetic circuit with an odd number of slots; in fig. 10 - part of the magnetic circuit made of a tape of measured length after the precipitation of teeth of greater height.

A method of manufacturing magnetic circuits of electric machines is carried out as follows.

Punching grooves in the tape

1 of electrical steel, wind tape on the edge with the arrangement of teeth on the outside of the package and fasten the package by welding, the grooves are performed at a distance from the edge of the tape, corresponding to the height of the tooth crown, in the area of the teeth in steps of two teeth division, are T-shaped cuts

with the formation of crowns, and after the package is fastened, the teeth with the crowns are deposited in the radial direction. With an even number of teeth in the magnetic core (Fig, 1, 2), the teeth

2 greater height and teeth 3 of lesser height, the same number, with teeth 2 performed with double-sided crowns 4 and 5 with a maximum tooth width along a crown equal to two tooth divisions on the straight belt 1, Teeth 3 are performed without crowns. -zone zones

and the bending of the ribbon onto the rib is made from a continuous ribbon in the form of a continuous, spiral magnetic circuit 6 and 7 (Fig. 3 and 4). After the precipitation of the teeth get the magnetic circuit with poluzakry10

14419 2

or closed slots (Fig. 5.6), respectively.

In the process of precipitation, the teeth are given a different shape depending on

 the design of the electrical machine and the technology of manufacturing the magnetic cores (Figs. 7 and 8). When an odd number of teeth in the magnetic core is punched out of a tape, with the formation of tooth-grooved zones, a strip 8 of a given measured length, and for teeth of a smaller height 9 (Fig. 9), one is larger than teeth 10 of a greater height, and the extreme teeth 9 on strips 8 curves with one-sided crowns and 12 In this case, the bend on the edge is produced from strips 8 of a given dimensional length, forming an annular magnetic circuit 13 with a junction 14 in each ring of the magnetic wire 20 formed by surfaces 15 and 16 (Figs. 9 and 10). manufacturing of rotors with a short-circuited winding - aketirovanie magnetic rings of bent carried out with

 the offset zones of the joints 14 between adjacent rings of the magnetic circuit.

The formation of magnetic conductors from the strips is carried out in three variants of the STRIPS are assembled into packages, the height of which corresponds to the required length of the magnetic conductor, then the package is bent onto the edge with the junction of zones 14; The strips are packed into packages, the height of which corresponds to only 35 parts of the required length of the magnetic cores, then the folded package is bent onto the edge, after which the magnetic core of the required length is assembled from several bent packages, each band is bent onto the edge, then the magnetic core is assembled from them packet length.

After the formation of an annular magnetic filament, it is fastened.

45 by welding on the inner surface 17, 18, 19 (Fig. 3, 4 and 10) in the axial direction. The number of welds during welding depends on the operating conditions of the electric machine, on the mechanical

50 of the strength of the joint and the dimensions of the mag - nit duct, therefore, may be different.

To ensure the constancy of the heights of all the teeth in the magnetic core, after

55 of the package attachment by welding, the teeth of a greater height are deposited (Figures 5, 6 and 10). For example, with a difference in the heights of teeth 2 and teeth 3, teeth of a greater height are produced by an amount.

thirty

313

Equal to this difference, the geometrical forms of the upset teeth can be different, depending on the machine design and the technology of manufacturing the magnetic cores (Fig. 8

The edges of the tape 20 and 21 (Fig, 1, 2 and 9), located on the opposite side of the divided teeth, can be made as solid, and with notches 22 and 23 with uniform intervals between them. Cuts or nails can be made against the slots, against the teeth, as well as in any area between them. The need to make cuts, their shape, location and number depend on the technology of bending the tape or strip to the edge on the size of the inner radius of bending of the ring magnetic circuit, as well as on the height of the bridge between the bottom of the groove and the whole edge. The incisions can be made in the form of an incomplete circle - an incision of 22, a triangle -

20

194

notch 23, trapezoid, rectangle, and other geometric shapes.

Claims (1)

Invention Formula A method of manufacturing magnetic circuits of electrical machines, including punching grooves in an electrical steel tape, bending a ribbon onto an edge with an arrangement of teeth on the outside of the package and securing the package by welding, characterized in that, in order to expand technological capabilities by manufacturing magnetic circuits with different degrees open the groove, the grooves are made at a distance from the edge of the tape, corresponding to the height of the tooth crown, in the area of the tooth arrangement with a step equal to two tooth divisions, incisions T-shaped second image to form crowns, and after bonding the package is produced precipitate t teeth with crowns in radial direction. 5 J 2 / / / figure 1 (rig 5 9UZ.6  ll ox CPu2.8 Fi.va , i9 f /  J Phi. ue.fff Editor M.Tovtin Compiled by A. Baldov Tehred A. Kravchuk Proofreader E. Roshko Order 2216/53 Circulation 661 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4