SU851646A1 - Electric machine slotless stator - Google Patents

Description

(54) SPARE PARTS ELECTRIC MACHINE

one

The invention relates to electric machines.

Known baseless stators of electrical machines, characterized by simpler manufacturing technology compared to slotted stators, have a distributed winding in the active part made of a number of packages assembled from alternating conductors and separated by an insulating layer of ferromagnetic sheet metal elements. The layer of conductors is placed on the same level 1.

However, the known baseless stators are characterized by the complexity of manufacturing technology, insufficient reliability of active packages consisting of conductors and ferromagnetic elements, as well as low use of electrical materials and the volume of machines, which degrades the energy performance of the stator.

Closest to the proposed unstressed electric machine stator, which contains an insulated RMO, an active part made of a number of packages, each package consists of groups with different lengths of frontal parts according to the number of machine phases made of separate isolated from each other and interconnected elements having cut-outs, by means of which groups articulated with each other form a package, and the elements also have cut-outs for the placement of the frontal parts and are bent by 180 ° along the longitudinal axis of the cut-outs. Moreover, the groups in the frontal part are M-shaped, which is obtained by bending to balance the height of element 2.

The disadvantage of a non-stator stator, Q, is an M-shaped bend, which leads to an increase in the size of the machine, an increase in material consumption, and the bends themselves require special manufacturing techniques.

The purpose of the invention is to reduce the size of the machine, to save material, to simplify the manufacturing technology.

This goal is achieved by the fact that, in a baseless stator of an electric machine, there is an armature and an active part isolated from it, made of a series of packets, each of which consists of groups with different lengths of frontal parts according to the number of maschine phases, made of separate isolated from each other and interconnected elements having cutouts, by which groups, articulated with each other, form a package, and the elements also have cutouts for the placement of the frontal parts - and are bent by 180 ° along the longitudinal axis of the cutouts, all The elements of the group in the frontal part are U-shaped in cross section. FIG. Figure 1 shows the construction of a bespodny stator of a cylindrical design (right part, section); in fig. 2- a group of three identical elements; in fig. 3 group of three elements with different width of frontal connections; in fig. 4 — strip with stamped notches and different width of frontal connections (for the third group); in fig. 5 - third group of folded strip; in fig. 6 - the same, after bending along the longitudinal axis; in fig. 7 - the same, after stretching; in fig. 8 - the same, end view; in fig. 9 - the same, top view; in fig. 10 - strip with stamped notches (fourth group); in fig. 11th group from the folded band; in fig. 12 - the same, after bending along the longitudinal axis; in fig. 13 - the fifth group of the folded band; in fig. 14 - pack assembled from three groups; in fig. 15 - package end view; in fig. 16 - the same, top view; in fig. 17 - the same, in a perspective view. The baseless stator has a PMO 1 made of electrical steel with insulated rings and a distributed active layer 2 consisting of magnetoelectric active sides of the coil groups 3-8, manufactured independently of rome. Each group consists of two active sides, for example 5-5 (Fig. 1). The active sides in the group consist of elements 9. The elements of the two active sides of the group are interconnected by frontal parts 10, which are U-shaped in cross section, which are integral with element 9. The group is integral with the insulation 11 all active elements and frontal connections. The active elements are insulated 12 from the PM. The coil groups are interconnected depending on the design of the windings (three-phase, single-phase, etc.) and the received connection scheme (parallel or serial). The package combines several groups. In this case, for three-phase winding three groups (for example, in accordance with the design in Fig. 1, groups 3-5 form one package, and groups 6-8 the second package). Groups are made up of isolated and interconnected elements made of a material that is magnetic conductive and electrically conductive, such as bimetal. If a group is assembled from the same elements, then the result is a difference in the length of the active elements (Fig. 2) Nap |, p, element 13 is higher, then elements 14, 15, etc. go. In order to align or balance the height of the elements in the known device, a special bend in the frontal parts is used, for example, elements 15, 14 and their active parts are raised upwards and compared in height to element 13. In order to make the same height 16 parts , without resorting to bending in the frontal parts, it is necessary to perform elements with different widths of 17 frontal parts of the elements (Fig. 4). According to FIG. 2, the height inequality of the elements is due to the thickness of the 18 and 19 elements and its frontal part. If the thickness 18 and 19 are denoted by a, then the element, for example, 14 is omitted by a value of 20, equal to 2a. In order for the elements to be at the same level 16 (Fig. 3), the width of the frontal parts of the individual elements must be different. The width of the frontal part of any element based on FIG. 2 and 3 can be found by the formula. Shp Sho-4pa, where W f is the width of the frontal part of the element n; Shd-width of the initial element (the largest); n is the number of the shortened element; a is the thickness of the element with regard to insulation and styling. In the strip (Fig. 4), a cutout 21 is stamped on one side, then the same cutout is stamped on the other hand, the width 17 of the frontal part of these notches is W o. with a width of Sha, etc. After stamping, the strip is insulated and folds along dotted lines 25 and 26. To form a coil group 3 (Fig. 5), with two active sides 27 and 28, made of elements 9 connected by frontal parts 10 of different widths. The smallest width is indicated by the position 29 (Fig. 5). The resulting group is bent according to the lines of symmetry 30-31 and a coil group is obtained as shown in FIG. 6. Distance 32 (FIG. 3) is 2/3 pole division t. Distance 33 is equal to pole division, distance 34 is 4/3-g. In FIG. 7 shows the third group after stretching the frontal parts, the end view is shown in FIG. 8, where the frontal parts 10 of the U-shaped form of the group itself are clearly visible. The group consists of three elements. These elements form the active sections 35 through which the magnetic flux passes in the stator s frame (Fig. 1). FIG. Figure 9 shows a top view of the third group with the designation of the width of the frontal part 36 and length 37. Group 4 is made similarly to group 3. But there is a difference in stamping. In strip 38, cutouts are cut as indicated.

in fig. 10, and the departures of the frontal parts 39 are longer than that of the group 3 by the length of the frontal part of FIG. 4. Frontal parts of different groups have different lengths. The width of the frontal parts of the respective elements is the same. For example, the first sections 17 in FIG. 4 and 10 are the same. The same and sections 23, etc. The cuts 40 and 41 are made to accommodate the front parts of the group 3. After the stamping, the strip 38 is folded along the dotted lines and the group 4 is formed (Fig. 11). Group 4 bends along the axis of symmetry 42-43 and takes the form shown in FIG. 12. The active elements 9 are connected to the right and barely frontal parts 44 and 45, (from the dotted line). Similarly to group 4, group 5 is made, but in this case, the length of the notches 40 and 41 is changed by the length of the frontal part, since the frontal parts of groups 3 and 4 must be placed in these notches. The length of the whole group increases by a double length of 37. After by bending the stamped strip, we obtain group 5 (FIG. 13) which, after bending along the axis 46-47, takes the form shown in FIG. 14, which shows all three groups assembled in a package.

Assembled and insulated interfacial groups are easily assembled into a bag, since there is a distance of 2 / 3t between their walls (see Figs. 3, 8, 9, size 32, 36). Groups are made of rectangular or shaped material. Group 3 is worn on group 4, with which they are worn on group 5. The front parts of group 3 enter the cutouts for the front parts of group 4, and the front parts of groups 3 and 4, in turn, enter the cutouts for front parts of group 5 The assembled bag is shown in FIG. 14-16 and is more compact than in the known device. The manufactured bag is insulated to form one monolithic whole, and in this form is placed in the rom stator.

GO

The proposed stator is compared with the known smaller size of the stator; simpler fabrication technology, and less material is used to make the stator.

The reduction in size is achieved due to the absence of an equalizing protrusion in the third (smallest of the three) group. The group has two sides and due to the alignment two more are added (four in total).

The other two groups have two sides, and only 8 sides. The proposed design has 6 sides. The reduction of material for the manufacture of frontal parts takes place at the expense of all groups.

15

Claims (2)

1. USSR Author's Certificate No. 278836, cl. H 02 K 15/10, 1968. 2. USSR author's certificate for application number 2648719, cl. H 02 K 1/06, 1978. f 1 P 15 IG about 25V  fo I / 26p 7 n Jj ig. 21 (/ Fy five iQ 32 Fig.8 FIG. 9 -y f / 1 , four Ix fJ 4.2 / 6 (.//  I X fe, / 2 "7 FIG. f3 J 5 / / / ig.P (Reg. 15