SU824372A1 - Electric machine slotless stasor - Google Patents

Description

(54) SECURITY ELECTRIC MACHINE STATOR

 This invention relates to electrical construction. Known bespazovy stator elekt. The pkkeyekoy G1ashiny, containing the active part, made of a number of packages, and isolated from them rmo IjIn this stator, the packages are made of alternating conductors and separated by a layer of sheet insulation. ferromagnetic elements. The disadvantage of such a stator is the low reliability of active packages consisting of wires and ferromagnetic elements, as well as the small use of electrical materials and the volume of the machine, which degrades the energy performance of the stator. This goal is achieved by the fact that, in the known baseless stator of an electric machine, each package consists of groups with different lengths of frontal parts according to the number of machine phases made of separate elements isolated from each other and interconnected elements having cutouts with the other, they form a package, whereby the elements also have cuts for placing the frontal parts and bent by 18 ° along the longitudinal axis of the cuts. FIG. 1 shows the unbraked stator of a cylindrical electric machine; in fig. 2 - connection of coil groups; in fig. 3 profiled strip for making the band; in fig. 4 - the same, side view; in fig. 5-11 shows options for making a strip; in fig. 12 - strip with stamped notches for one group; in fig. 13 - a group of folded strip (third); in fig. 14 the same, after bending along the longitudinal axis; in fig. 15 - the same, side view; in fig. 16 is a strip with vyytag povalnye notches (fourth group); FIG. 17 - a group of folded strip (fourth); in fig. 18 - the same, after bending along the longitudinal axis; in fig. 19 - the fifth group from the folded band; in fig. 20 - the same, after bending along the longitudinal axis; on Fig package in assembled form; in fig. 22 the same, top view; in fig. 23 - the same, side view; in fig. 24 - the same, bottom view; in fig. 25 - stator, break-through incision; FIG. 26 is a schematic iso-reflection of a coil of a group.

The baseless stator has a PMO 1, made of electrical steel rings with insulation, and a distributed active part consisting of the magnetoelectrically active sides of the coil groups 3–8, manufactured independently of the rome.

Each group consists of two active sides, for example, 5-5 (Fig. 1). The active parties in the group consist of elements 9 (Fig. 1.12). The elements of the two active sides of the group are interconnected by the frontal parts 10 (Fig. 5.16), which are integral with element 9.

The group is integrally formed with the insulation 11 of all active and frontal parts (Fig. 1). The active elements are insulated 12 from rm 1. The coil groups are interconnected depending on the design of the windings (three-phase, single-phase, etc.) and the connection scheme adopted.

An embodiment of the three-phase, non-gap, four-pole winding is shown in FIG. 2, where the connection is shown: coil groups 3-6, forming phase A, coil groups 4-7 forming phase B and coil. 5-8 groups forming phase C.

The active side of the coil group shown in FIG. 2 one line consists of n active elements 9.

The package combines several groups. In our case, for three-phase winding - three groups (for example, in Fig. 1 - groups 3, 4, 5, one package and 6, 7, 8 - another package).

The elements are interconnected and made of a material that is magnetic conductive and electrically conductive, such as bimetal.

FIG. 3 and FIG. Figure 4 shows the profiled strip 13 from which the group is made. This strip can be obtained, for example, by the rolling method. The strip has an upper 14 and lower 15 conical parts. interconnected by a rectangular section 16. The upper and lower edges of the strip are rectangular. By their structure, the strip can be made of a ferromagnetic material (FIG. 5) and a bimetal (FIG. 6 - FIG. 10). FIG. 6 shows a cross section of a strip consisting of a ferromagnetic material 17 and a material of high conductivity (for example, copper) 18. In Fig. 7, high conductive material 19 is inside and in FIG. 8, the high conducting material 20, 21 is on both sides of the strip. The proposed strip can be obtained completely by the rolling method or it can be, for example, rolled ferromagnetic

Part of it is electrolytically or otherwise known / 1, and a layer of a cushioning material is applied by methods. Depending on the band structure, the flux varies. In FIG. 9, the high conductive material is located at the ends, and in FIG. 10, the high conductive material may be arranged as in FIG. 6, 7, 8, 9. The taper of the strip depends on the ratios of the inner and outer diameters (Fig. 1) and the number of elements 9 of the entire stator.

FIG. Figure 11 shows the profile of a rectangular strip that can be made in bimetallic design.

When designing a statorless winding, it is necessary to select the number of elements 9 in such a way as to obtain strip sizes that are convenient for bending and, if necessary, create parallel circuits. In the above-mentioned engine, the number of parallel elements is six (three parallel circuits and in each of them two elements in parallel). Thus, the size of the strip must be selected from technological conditions and economic considerations, which must be optimal in terms of losses, both electrical and magnetic.

At that time, as the electrical losses depend on the correct choice of the cross section of the element, the magnetic losses depend on the upper and lower thickness of the elements (Fig. 3) and their structure, i.e. the ratio of the ferromagnetic and highly conductive parts, which can vary from zero to 100 percent. In general, the thickness of the element is not large.

On one side of the strip, the notch 22 is stamped, then the same notch 23 is stamped on the opposite side of the strip, and so on. The length 24 of the notch is longer than the length of the element by the length 25 of the frontal part, and the depth 26 of the notch is greater than the height of the 27th element by the length of the frontal part. After stamping, the strip is folded along the dotted lines (Fig. 12) and a coil group is formed, for example, shown in Fig. 1c and consisting of two active sides 28 and 29, made of elements 9 connected by frontal parts 10.

The resulting group is bent along the line of symmetry 30-31 and a coil group is obtained (Figs. 4 and 15).

Group 4 is made in the same way as Group 3, only there is a difference in the stamping. In yolo, se in fig. 3, a notch is stamped as indicated in FIG. 16, and the departures of the frontal parts are longer than that of the -group 3 for the width of the two frontal parts of figure 12 (the width of all the frontal connections of all groups is the same). The frontal parts of different groups have different lengths. FIG. Figure 17 shows a coil group formed by bending a strip 13 at the ends, when the group length is obtained across the line of curvature. It is possible to produce the strip 13 and thus, when the length of the coil group will be parallel to the bend line. In this case, the manufacturing process is somewhat more complicated and the lib compounds are worse used. After stamping, lane 32 is folded in dotted lines and group 4 is formed (Fig. 17). Group 4 bends along the axis of symmetry 33-34 and takes the shape shown in FIG. 18. Active elements 9 are connected to the serrava and to the left (from the dotted line) with frontal connections 35 and 36. Similarly to group 4, group 5 is made, but in this case the length of the notches 37, 38 changes to the width of the frontal parts. After bending the stamped floor, we obtain group 5 (Fig. 19), which after bending along the axis 39-40 takes the form shown in Fig. 20. Having fabricated in a similar way all groups of non-gasless windings, I proceed to assembling groups into packages. We enter:; ice leap in the image. Ber group 3 (Fig. 14), we open a little and half of it is exposed to the formation 41 of group 4 (Fig. 17) and we put on the protrusion 42 of the active element. The assembled halves of the two groups are placed in the opening 43 of group 5 on the EXHIBITION 44. After the deposition of all the coil groups, we receive a package 45, which is shown in FIG. 21-23. From the figures one can see the disposition of all three groups in the package 45, namely, groups 3, 4, 5. All frontal parts have a bend 46 that equalizes the height of the element (Fig. 15–23). The length of the frontal parts of individual groups is not the same (Fig. 21-23). Therefore, in the manufacture of a baseless machine, it is necessary to adjust the length of the frontal parts, using groups with different lengths of frontal parts in each phase as for ordinary machines. All the packages are assembled into the template and then placed with the RMO 1. The active Section 47 formed in the packages is covered with insulation 12. The room in the PMO can be made by pressing, by heating the ROM, and so on. The yoke itself with a baseless winding is placed in housing 48 (Fig. 25). The yoke in the case is fixed by rings 49, 50. The winding packages are fixed due to the existing taper and in addition, due to annular inserts 51, 52, which are clamped by rings 53, 54. Inserts 51, 52 can be manufactured as magnetic circuit elements for conducting magnetic flow frontal parts. Having considered the 1st stator on the air gap side, it can be established that the frontal sections of the unsplit winding, being a continuation of the active section 9, are distributed between the side M of coil groups and are essentially active in this winding design. FIG. 24 shows the view of the package from the air. Here, to the right and left of the dotted lines 53,54 are the frontal parts. In the design of the non-winding, sections 55, 56 in all phases can be fully utilized, which gives a noticeable additional technical effect due to the elimination by 50% of the inactive front part for one part of the phase and the reduction by 40% of the inactive front parts of others. Due to the elongation of the rotor, other parts of the frontal parts are used, for example sections 57, 58. The current in the element passes through the ferromagnetic part of the element and at the same time through a part of highly conductive material. Such a design allows better utilization of the entire volume of the machine. The current passing through the elements creates a magnetic field, which in the whole pole division will pass through the ferromagnetic parts of the elements. Thus, the element is a conductor in one direction and a magnetic conductor in the perpendicular direction. The magnetic flux passes through the ferromagnetic part of the elements 9, the air gap (insulation 12), rm 1, then on the pole division it is closed through the insulation 12, elements 9, the air gap and the rotor. A portion of the work flow closes along the frontal portions of the bags (Fig. 26). Figure 26 schematically depicts a coil of a group and indicates the passage of a current G. This current creates a magnetic field forming the S and N poles. Emf. Thus, in the described device, the frontal parts are in addition to the active elements 9, the magnetic flux F passes through them and an emf is created. The proposed stator makes it possible to increase the reliability of operation of baseless machines due to the reliability of the package fastening and the solidity of the frontal parts. The use of active materials is also enhanced by the winding design, which makes it possible to better use the frontal parts, which are active sites for the passage of not only current, but also magnetic flux.

Claims (1)

1. USSR author's certificate No. 278836, class, H 02 K 15/10, 1968. eight eleven Fig 2 (rig. J 20 x2 / (pu & S t / g.ffi Yu .11 g ten Fig., Fc f S P 28 3ff L u 17 44 "J J j 39 t / g f9 S J / / /  fff 9 4g ig f & / fpui zo 1 / g 22 u2 fpuei