SU1429220A1 - Toothed zone of electric machine magnetic core - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to improve reliability and improve the energy characteristics of the electric machine. The jagged area of the electric machine magnetic circuit contains teeth corrugated from tape 1, jumpers 3 between them and through slots 4, filled at each bend of tape. Due to the fact that the jumpers 3 are made convex along the length of the slot 4 towards the groove, the goal is achieved. 5 il.

Description

Fig-7

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11429220

. The invention relates to electrical engineering, in particular to the design of the magnetic circuits of electrical machines

: The aim of the invention is to increase: reliability of operation and improvement of: the energy characteristics of electric machines,

I Figo 1 shows the tooth area of the magnetic circuit of an electrical machine; in fig. 2 - the same, before machining; in fig. 3 - tape and made through the slot; Fig 4 - view A on fng. one; in fig. 5 - view B in FIG. 2o

The teeth of the electric machine magnetic circuit is made of non-corrugated corrugated tape 1. The ribs of the corrugations 2 form teeth, between which jumpers 3 are placed, separated from the edges of the corrugations 2 by through slots A. The slits 4 are limited in length along the edges of the ribbon by solid non-cut sections. When corrugating the ribbons on the ridges of the t-ofres in areas of the folds, pads 5-7 are formed, and pads 5 of the solid not cut sections protrude above the plots of the cut sections by 5 and S, respectively, and bridges 3 between the teeth become arcuate in shape 8 side open slots 9.

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By bringing the surfaces of the teeth in the bend zones on the solid non-cut areas to the level of the surfaces of the cut-out bent areas of the teeth.

The manufacture of the tooth zone of the magnetic circuit of the electric machine is carried out as follows.

An electrical steel tape of the required width is installed on a single-position device, where the formation of through-slots with the required spacing between them, for example, punching, is completed at the first position, while the solid non-cut sections are left at KpaJTX to preserve the integrity of the tape. In the second position, the corrugations are made with the formation of teeth and jumpers between them, moreover, the bending is carried out along lines coinciding with the direction of the slots, and during the formation of the groove, the bridges between the teeth with a bulge in the direction of open grooves are drawn. Upon reaching a predetermined length of the dentate zone, its separation is carried out. This operation is performed at the third position. In the fourth position, the dentate zone is rolled up into a ring, then mechanical treatment, such as firmware, groove, boring, and distillation, is completed. The mechanical treatment ensures the constancy of the height of the corrugations of the teeth in the longitudinal accumulation by bringing the surfaces of the teeth in the bend zones on solid non-30

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The values of 8, and approximately the same, correspond to values of (0.4-0.6) S, where S is the initial thickness of the deformable tape in millimeters, and the coefficients 0.4-0.6 depend on the steel grade of the deformable len Q of the cut areas to the level of the surfaces of the cut through bend the areas of the teeth. Calibration and connection of the joints of the rolled into 1 are performed in the fifth position, the tooth face and the bending method are flexible. The deflection of the bridge and in its middle part depends on the tape thickness, the length of the cut part of the jumper and its width and for each design of the tooth zone must be chosen constructively. For example, for a tooth zone made of 0.5 mm tape, The slit width is 2 mm, and the length of the cut part of the jumper is 30 mm, the optimum deflection & in the middle part of it is 0.5 mm

To eliminate the jaggedness of the surfaces on the ridges of the ribs of the corrugations formed after bending, the mechanical treatment of the dentate zone is ensured, which ensures the constant height of the corrugations of the teeth in the longitudinal direction, for example, by laser welding. Next, the ready-toothed area of the magnetic circuit is transferred to the following operations.

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Making cuts on the tape allows to reduce the efforts in the formation of the dentate zone, to improve the accuracy of the manufacture of the denta zone, and to increase the productivity of manufacture.

Making bridges between the teeth of an arcuate shape with a bulge on the side of open grooves increases the reliability of the electric machine by preventing sagging10

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By bringing the surfaces of the teeth in the bend zones on the solid non-cut areas to the level of the surfaces of the cut-out bent areas of the teeth.

The manufacture of the tooth zone of the magnetic circuit of the electric machine is carried out as follows.

An electrical steel tape of the required width is installed on a single-position device, where the formation of through-slots with the required spacing between them, for example, punching, is completed at the first position, while the solid non-cut sections are left at KpaJTX to preserve the integrity of the tape. In the second position, the corrugations are made with the formation of teeth and jumpers between them, moreover, the bending is carried out along lines coinciding with the direction of the slots, and during the formation of the groove, the bridges between the teeth with a bulge in the direction of open grooves are drawn. When a given length of the dentate zone is reached, its separation is performed. This operation is performed at the third position. In the fourth position, the dentate zone is rolled up into a ring, then mechanical treatment, such as firmware, groove, boring, and distillation, is completed. The mechanical treatment ensures the constancy of the height of the corrugations of the teeth in the longitudinal accumulation by bringing the surfaces of the teeth in the bend zones on solid non-30

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Q cut areas to the level of the surfaces of the cut out bend the teeth areas. Calibration and joining of the joints rolled in 1 are performed in the fifth position, for example, laser welding. Next, the ready-toothed area of the magnetic circuit is transferred to the following operations.

Making cuts on the tape allows to reduce the efforts in the formation of the dentate zone, to improve the accuracy of the manufacture of the denta zone, and to increase the productivity of manufacture.

Making bridges between the arcuate teeth with a bulge on the side of the open grooves increases the reliability of the electric machine by preventing the bridges of the teeth of the stator and rotor zones from sagging towards the main working air gap, which causes the rotor to wedge.

The implementation of the constant height of the corrugations of the teeth in the longitudinal direction using machining ensures uniformity of the technological and working gaps, and also reduces the size of the technological gaps, which, in turn, reduces the magnetization losses and leads to an increase in the efficiency of the machine.

Making the bridges between the arcuate teeth and performing the machining of the tooth zone also improves the quality of the product.

Thus, the proposed technical solution allows to increase the reliability of the electric

tires, to eliminate defects from jamming and rotor, to improve the energy characteristics of electric machines, to improve the quality of the fabrication of the toothed zone of the magnetic circuit and the machine as a whole, to increase the productivity of manufacturing of the toothed zones,

Claims (1)

Invention Formula The teeth of the magnetic circuit of an electric machine, the teeth corrugated from the tape and the jumpers between them, through slots, tape bored at each bend, and areas formed by the sides of the slot bent when the tape is bent, in order to increase reliability and improve The energy characteristics of the electric machine, the jumpers of the small teeth are made convex to the side of the groove along the length of the slot. Srig.G. Vida