MX2014013540A

MX2014013540A - Plate bundle for manufacturing a stator.

Info

Publication number: MX2014013540A
Application number: MX2014013540A
Authority: MX
Inventors: Laszlo Toth; Daniel Gremmel; Steffen Didra
Original assignee: Bosch Gmbh Robert
Priority date: 2013-11-07
Filing date: 2014-11-07
Publication date: 2015-06-24
Also published as: DE102013222643A1; ES2547631R1; ES2547631B1; MX341251B; CN104638782B; ES2547631A2; HUP1400524A2; CN104638782A; HU230563B1

Abstract

The invention relates to a plate bundle for manufacturing a cylindrically-shaped arched stator (6) of an electrical machine, which comprises a plurality of sheets (2) with successive grooves (3) and teeth (4) with tooth tips (5). Winding wires (14) of a winding stator (10) are arranged in the grooves (3) and at the end portion thereof (12) projecting wires (9) extend from the winding stator (10) which, when the arched stator is completed (6) are inserted into the projecting grooves (11) at the opposite end (13) of the plate bundle. The tooth tips (5.1) adjacent the projecting grooves (11) for forming openings with wider grooves, comprise a width lower than the remaining tips with normal teeth (5) of the plate bundle.

Description

PIANO PACKAGE TO PRODUCE A STATOR FIELD OF THE INVENTION The invention relates to a flat package for producing a stator.

BACKGROUND OF THE INVENTION To produce a stator of an electrical machine, die-cut foil laminations can be used, which first come together in a so-called flat package. Each lamella has a series of grooves and sequential teeth, so that the series of grooves and teeth are formed correspondingly in the flat pack. In the slots, the wires of the stator winding can be introduced, so that the flat pack with the stator winding then inserted in a bending process can be bent to form a cylindrical stator.

The stator winding inserted into the slots can be formed in such a way that at one end of the flat pack five turns extend as excess wires, which are inserted into the corresponding slots at the other end of the flat pack, when the flat pack arches in shape of a cylindrical stator.

A machine is known from US 7,366,000 B1 electric that presents a cylindrical stator produced with a flat package. To reduce magnetic noise, the stator teeth are provided with teeth heads of different widths.

BRIEF DESCRIPTION OF THE INVENTION The flat package for the production of the cylindrically arcuate stator formed according to the invention and having the features of claim 1, has the advantage that the excess wires of the stator winding, which protrude at one end of the flat package, can be introduced without problems in the corresponding protruding grooves, when the flat pack arches in the form of a cylindrical stator and both ends of the flat pack are joined together.

The openings of the protruding grooves which are bounded on both sides by the heads of the teeth have an opening width that is greater than the width of the protruding wires to be introduced into the projecting grooves, including the insulation surrounding the wires outstanding. By means of an opening width of this size, the introduction of the projecting wires is particularly facilitated. The width of the opening of the protruding grooves can very advantageous to be 4% to 8% greater than the width of the opening of the other slots. With this, simple insertion into the projecting grooves is made possible on the one hand, which on the other hand in the cylindrical, arcuate state of the stator, the wires are held securely in the projecting grooves. By means of the cylindrical flexure of the flat pack, the amplitude of the opening is also reduced in the protruding grooves, in such a way that the protruding protruding wires are retained in the protruding grooves in a safe manner.

In a flat package whose grooves regularly have an opening width of 2.09 mm, for the projecting grooves an opening amplitude of 2190 mm is provided. With this, an essential simplification of the assembly of the projecting wires is obtained, which during the production of the cylindrical stator can be introduced without problems in the protruding grooves. Simultaneously it was achieved that the protruding wires were securely fastened in the finished stator.

It is particularly advantageous if the grooves protruding from the base of the groove to the tooth head have a greater height than is normal in the grooves. This makes it possible for the protruding wires to be inserted into the slots The insulators are surrounded by an insulator with an open C-shaped cross section, which can be used as an insulating material for insulation. Since the protruding wires with their insulation that surrounds the underside is placed on wires of the winding that are already in the protruding slots, there is a greater height in the protruding grooves for the placement of the winding wires than in the case of the normal grooves. The insulation surrounding the projecting wires, which is open upwards, in front of the insulation that is open downwards, has the advantage that the protruding wires with the insulation open upwards can essentially be inserted more easily into the protruding grooves. To obtain these assembly advantages, this is why the protruding grooves with a greater height are formed between the base of the groove and the heads of the teeth.

To obtain a greater height between the base of the groove and the teeth heads in the protruding grooves preferably the heads of the teeth have a reduced height in the protruding grooves in comparison with the normal teeth heads, with which however the Total length of the tooth including the tooth's head remains the same in all teeth. The reduction of Tooth heads can be performed without problems and does not produce considerable modifications in regard to the magnetic properties in the area of the protruding grooves.

BRIEF DESCRIPTION OF THE FIGURES The invention will be described in more detail with the aid of exemplary embodiments represented in the drawings, in which: Figure 1 shows a top view on the flat pack of a plurality of lamellae; Figure 2 shows the front view of the flat pack of Figure 1; Figure 3 shows the front view of an almost completely arched stator formed by a flat pack according to Figure 1; 4 shows an enlarged representation in the area of the ends of the arcuate plane packet which make contact with each other when the stator arches, and Figure 5 shows an enlarged representation of the front view of Figure 2 with the indicated protruding wires.

DETAILED DESCRIPTION OF THE INVENTION A sheet pack 1 shown in FIG. 1 in the form of a flat pack has a plurality of individual lamellas 2, which for example may have been punched out of a steel sheet with a thickness of 0.5 mm. In the front view of figure 2 the front lamella 2 of the foil pack 1 of figure 1 is observed.

Each of the lamellae 2 has grooves 3 and teeth 4. At the upper end of the teeth 4, tooth heads 5 are formed, whose width is selected in such a way that a suitable opening width is obtained between the tooth heads 5.

In the slots 3, the wires of the stator winding are introduced, which however are not shown in FIGS. 1 and 2.

With the help of FIGS. 3 and 4, it is now shown how a cylindrically shaped arched stator is produced from the flat pack according to FIGS. 1 and 2. In the front view of figure 3, the stator 6 almost completely arched is represented simplified, which on its inner side 7 has grooves 3 and teeth 4. For simplicity the grooves 3 and the teeth 4 are only represented in the lower area of the stator 6 in Figure 3, wherein both ends of the flat pack of Figure 1 have been joined to forming an annular stator 8 closed. To this end, the so-called protruding wires 9 of the stator winding 10 are introduced into the corresponding protruding grooves 11. In FIG. 4 this is clearly shown in an enlarged representation in the area of both ends 12, 13 of the arched sheet pack 1.

Figure 4 shows the wires of the winding 14 inserted into the grooves 3, which are surrounded by an insulating paper 15. Which has a C-shaped cross-section open upwards and surrounds the winding wires 14. The protruding grooves 11 they are not completely filled with winding wires 14, since the protruding wires 9 must be inserted into the protruding grooves 11 from above. So that the introduction of the projecting wires 9 can be carried out without problems, they are arched upwards with a small angle OI.

In addition, the protruding grooves 11 are formed with a greater opening width in the area of the tooth heads 5, as shown in more detail with the help of FIG. 5.

In FIG. 4 it can also be seen that the projecting wires 9 are surrounded by an insulation with a C-shaped cross-section facing upwards with insulating paper 16, in the form of an insulating paper 16. The insulation arranged in this way in the protruding wires 9 requires a receiving area a little higher in the protruding grooves 11, and this is with a height corresponding to the thickness of the material of the insulating paper 16.

In figure 5 the front view of a flat pack according to the invention is shown enlarged, in such a way that the measurements of the grooves and the heads of the teeth can be better recognized. At the left end 12 of the flat pack are the protruding wires 9 of the stator winding which is not shown here, as can also be seen in FIG. 4. The protruding wires 9 can, as shown in FIG. 4, be arched upwards with an angle a, before the flat pack arches to form a cylindrical stator 6, as shown in figure 3.

The protruding wires 9 are inserted into the protruding grooves 11, when the flat pack, as shown in FIGS. 3 and 4, arches in the shape of a cylindrical stator 6. The heads of the teeth 5.1 in the area of the protruding grooves 11 have a reduced width with respect to the other tooth heads 4, so that for the protruding grooves 11 a greater width of the opening w2 is formed compared to the width of normal opening wl. In figure 5 it can also be seen that the area of the projecting grooves 11 the tooth heads 5.1 have a lower height than the tooth heads 5. With this in the protruding grooves 11 from the base of the groove 17 to the tooth head 5.1 there is a height h2 greater than in the case of the regular tooth heads 5, which from the base of the slot 17 to the head of tooth 5 have the height hl. In the case of a stator already formed, the protruding blades 9 of the stator winding are introduced in the positions shown with dotted lines in the protruding grooves 11.

Claims

NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following is claimed as property:

1. Flat package for producing a cylindrically shaped stator (6) of an electrical machine, consisting of a plurality of lamellae (2) with grooves (3) and teeth (4) with sequential tooth heads (5) and in these grooves (3) the winding wires (14) of a stator winding (10) are found and at their end (12) protrude the projecting wires (9) of the stator winding (10), which when the arched stator is formed ( 6) are inserted into the protruding grooves (11) of the other end (13) of the flat pack, characterized in that the tooth heads (5.1) of the teeth (4) abutting the protruding grooves (11) to form more slot openings wide, have a smaller width than the other normal tooth heads (5) of the flat package.

2. Flat pack according to claim 1, characterized in that the openings of the protruding grooves (11) that adjoin both sides with the heads of tooth (5.1) each have an opening width (w2), which is equal to or greater than the width of the protruding wires (9) with their corresponding isolation, which will be introduced into the protruding grooves (11).

3. The flat pack according to claim 2, characterized in that the width of the opening (w2) of the protruding grooves (11) is 4% to 8% greater than the width of the openings (wl) of the other grooves (3). ).

4. The flat pack according to the preceding claims, characterized in that the protruding grooves (11) from the base of the groove (17) to the tooth heads (5.1) has a greater height (h2) than the other grooves (3).

5. The flat pack according to claim 4, characterized in that the height of the tooth heads (5.1) in the protruding grooves (11) is smaller compared to the height of the other tooth heads (5).

6. The flat pack according to the preceding claims, characterized in that the protruding wires (9) in the protruding grooves are inserted in an insulation with a C-shaped cross section, made of paper or any other insulating material in the form of a film, whose open side is oriented towards the opening of the slot.