SU1718336A1 - Single-cycle asynchronous motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in single-phase asynchronous motors. The purpose of the invention is to reduce the consumption of ferromagnetic material. The electric motor contains a rotor 1, an excitation coil 2, a core 3 of the excitation coils and a core of 4 poles with interpolar jumpers 5 and protruding parts, between which a core 3 is installed. Both protruding parts of the core 4 on the side of mating surfaces each have one rectangular tooth and the symmetrical surfaces of the core 3 have the shape of a rectangular recess and a convex cylindrical surface. 1 hp f-ly, 2 ill. w and 00 with so about 8 Yu 7

Description

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The invention relates to electrical engineering and can be used in the production of single-phase asynchronous motors.

Single-phase asynchronous motors are known, comprising a rotor, an excitation coil assembled from ferromagnetic plates, an excitation coil core, and a pole core with interpolar jumpers, having a portion encompassing the rotor, and protruding parts, between which the core with the exciter coil is mounted. The core of the excitation coil is in the shape of a dog bone. The matching surface of the core of the poles and the core of the excitation coil is cylindrical.

The disadvantage of the engines is the increased consumption of ferromagnetic material and the increased labor intensity of insulating and winding operations due to the shape of the dog bone shape.

The aim of the invention is to reduce the consumption of ferromagnetic materials.

The goal is achieved by the fact that both protruding parts of the core of the poles on the side of the mating surfaces contain one rectangular tooth, and the recesses of a cylindrical shape symmetrically located relative to the rectangular teeth, the axes of symmetry of the cylindrical surfaces of these recesses being shifted by the same value relative to the axis of symmetry of the width of these recesses towards the rectangular teeth, both mating surfaces of the core of the excitation coil are in the form of a rectangular notch and a cylindrical surface, use repeat form a mating guide surface (tooth cylindrical shape and the recess) of the poles of the core and in the outer corner portions of the pole core recesses repeated guides form part of its surface consisting of a cylindrical recess extreme form.

In order to increase the reliability, an insulating gasket is installed between the field coil and the interpolar bridge. .

FIG. 1 schematically shows the proposed single-phase asynchronous motor, cross section; Fig. 2 shows the low-waste use of a steel (ferromagnetic) tape, which is achieved in the manufacture of this single-phase asynchronous motor.

A single-phase asynchronous motor contains a rotyr 1, the core of which is laminated from ferromagnetic plates, the excitation coil 2, assembled from ferromagnetic plates, the tip 3 excitation coils, the core of 4 poles with interpolar

jumpers 5 The protruding portions of the core of the poles on the side of the mating surfaces contain one rectangular tooth 6. The relatively rectangular teeth 6 are symmetrically arranged notches 7 of cylindrical shape. The symmetry axes of the cylindrical surfaces (having a diameter d equal to 1.05-1.35 of the outer diameter of the rotor) of these grooves7 are shifted by the same amount

5 a, equal to 0.05–0.25 width from the core of the coil, relative to the axis of symmetry of the width b of these notches, equal to 0.5 to 0.9 width from the core of the coil, towards the rectangular teeth 6. The coil is active

0 2 excitation (windings wound on a plastic frame 8) is located in a window 9 bounded by a core of 4 poles and a core of 3 excitation coils. To increase safety, an insulating (plastic) gasket 10 is installed between the excitation carcass 2 (frame 8) and the interpolar bridge 5. In the corner portions of the pole core there are recesses 11 that repeat the shape

0 parts, its surface, including the extreme v.eymku cylindrical shape.

The rotor 1 plates, coil core 3 plates (shaded in Fig. 2) and the 5 core plates 4 of the poles are punched out of the steel strip, at the same time forming a spherical part of the mating surface separated from the edge of the poles of the subsequent plate. The core plates 3 of the coil are wrapped, turned in the same plane by 180 °, the excitation coil 2 is put on the core of the coil, then mates with the core of 4 poles along the straight surface of the rectangular tooth and more distant from the rotor of the spherical surface. The presence of the recesses 11 makes it possible to shorten the punching step.

Performing the mating surface of the core of the excitation coil with

0 by the core of the poles in the form of a spherical surface and a section of the direct surface makes it possible to obtain a sufficiently dense connection.

Making the grooves at the edges of the poles in the proposed design eliminates the magnetically underloaded parts, the poles, and the steel removed to form the window of the excitation coil as a useful magnetic conductor.

Claims (2)

The presence of an insulating gasket installed between the excitation coil and the inter-pole jumper allows to meet the requirements for enhanced insulation without increasing the consumption of ferromagnetic materials, increasing reliability; Claim 1, Single-phase asynchronous motor comprising a rotor, an excitation coil assembled from ferromagnetic plates, an excitation coil core and a pole core with interpolar jumpers, having a portion encompassing the rotor, and protruding parts, between which the core is coupled to the excitation coil, This is due to the fact that, in order to reduce the consumption of ferromagnetic materials, both protruding parts of the core of the poles on the side of the mating surfaces contain one square each th tooth and symmetrically located relative to each five 0 From the rectangular teeth, the recesses are cylindrical, and the symmetry axes of the cylindrical surfaces of these recesses are shifted by the same magnitude with respect to the axis of symmetry of the width of these recesses towards the rectangular teeth; both matching surfaces of the core of the excitation coil have the shape of a rectangular recess and cylindrical surface; the matching shape of the mating surface of the rectangular tine and the notches of the cylindrical shape of the core of the poles, and in the outer corner parts of the core of the poles are made notches, p guides form part of its surface consisting of a cylindrical recess extreme form. 2. An engine as claimed in claim 1, in accordance with the rule of law and so that, in order to increase reliability, an insulating gasket is installed between the drive coil and the interpolar bridge. Ltd ь г г but ABOUT Ltd