WO2018019969A1

WO2018019969A1 - Method for introducing an insulation paper

Info

Publication number: WO2018019969A1
Application number: PCT/EP2017/069095
Authority: WO
Inventors: Veronika SCHALLER; Korbinian SEIDEL; Ralf RAUSCHER; Martin Otter
Original assignee: Grob-Werke Gmbh & Co. Kg
Priority date: 2016-07-27
Filing date: 2017-07-27
Publication date: 2018-02-01
Also published as: DE102016113898A1

Abstract

The invention relates to a method for introducing an insulation paper into at least one groove chamber of a component, in particular of a rotor or stator, of an electric motor, wherein the groove chamber is provided in order to receive at least one electrical conductor, wherein the insulation paper is first pushed onto the at least one electrical conductor and then the at least one electrical conductor is introduced into the groove chamber together with the insulation paper.

Description

Method for introducing an insulating paper "

The invention relates to a method for introducing an insulating paper into at least one groove space of a component, in particular a rotor or stator, of an electric motor, wherein the groove space is provided to receive at least one electrical conductor.

The insulating paper has the task of producing an electrical insulation between the component of the electric motor, the rotor or the stator and the at least one electrical conductor.

In the prior art, it is known for this purpose in the grooves of the component, each of which forms the respective groove space, insert individual insulating paper pieces and then introduce into the groove or the groove space the at least one electrical conductor.

Usually, the device is rotationally symmetrical and it is correspondingly difficult to reliably hold the individual Isolierpapierstücke in the respective groove until the at least one electrical conductor is used.

The invention has therefore taken on the task of improving this prior art.

To solve this problem, the invention proposes a method for introducing an insulating paper into at least one groove space of a component, in particular a rotor or stator, an electric motor, wherein the groove space is provided to receive at least one electrical conductor, wherein first the insulating paper on the at least one electrical conductor is pushed and then the at least one electrical conductor is introduced together with the insulating paper in the groove space.

The whistle of the invention is that the at least one electrical conductor outside of the component is combined with the respective insulating paper and this assembly is then installed together in the component. In this case, one makes use of the fact that for a positionally accurate introduction of the at least one electrical conductor per groove or groove already appropriate precautions are taken, ie guiding or guiding elements or holding elements are provided, which are then cleverly also used to the insulating paper hold. At the same time, the insulating paper which is pushed onto the at least one electrical conductor serves as mechanical protection of the at least one electrical conductor, since it is precisely the insertion of the at least one electrical conductor into the groove which can lead to damage of the insulating lacquer of the at least one electrical conductor.

The invention relates to the groove space of a component of an electric motor. As a component of an electric motor, the rotor or stator is to be understood. These are often formed in a known manner as a rotor core or laminated stator core and have a plurality of longitudinal grooves. These grooves each form a groove space, which is provided in each case for receiving at least one electrical conductor.

The invention provides for the design of the at least one electrical conductor before a plurality of variants.

First, it is provided that the at least one electrical conductor is part of a, even multi-layered wire winding.

Furthermore, it is provided that the electrical conductor is designed as a hairpin. This is a U-shaped bent wire segment having straight, parallel ends. These are inserted on one side into the component, wherein the ends each pass different grooves. Subsequently, the wire ends are deformed on the opposite side of the component, so that in each case two conductors can be mechanically and electrically connected by a suitable method and thus form the windings of the component. It should be noted that there are a large number of variants of the hairpin method, which are likewise encompassed by the invention.

As a rule, the at least one electrical conductor, while passing the groove, is oriented straight. It is clear that the inventive proposal includes both solutions with only one electrical conductor per groove or groove space, which is also formed with a plurality of electrical conductors or wires, wherein the electrical conductor itself, for example, as a flat wire, shaped rod or as a wire can be formed.

The at least one electrical conductor is part of a wire winding. The wire winding consists at least of an electrically continuous line which forms an electrical conductor in the respective passages of the individual grooves in the sense of this disclosure. It will be appreciated that a wire winding has a plurality of leads in parallel and each lead forms a plurality of electrical conductors.

Advantageously, it is provided that a holding element is provided which serves to hold the pushed onto the at least one electrical conductor insulating paper on this. This may be a separate component or another function of a component used anyway, such as a joining tool, as will be described below.

Furthermore, it is advantageously provided in the proposal that the insulating paper in a, relative to the longitudinal axis of the component or a joining tool, predominantly axial or radial movement is pushed onto the at least one electrical conductor. The at least one electrical conductor is oriented straight in the groove space at the end. Equivalent to this proposal is therefore a direction of movement of the insulating paper parallel to the longitudinal extent of the electrical conductor or at right angles thereto. Of course, the proposal according to the invention also includes this oblique directions of movement, which thus include an acute angle with the longitudinal extent of the wire or the longitudinal axis. A joining tool is understood to be a tool that serves to arrange the wire winding, which has been produced, for example, in a preceding process step, in an orderly, reliable manner and with high reliability in the component, for example a stator. The joining tool has a plurality of groove-like receiving spaces. They serve to accommodate the at least one electrical conductor for mounting purposes in the stator and so for example to transport or store.

The joining tool is preferably actively formed, i. It has corresponding movable elements which can perform certain movements by one or more drives and thus, for example, uses the at least one electrical conductor, for example as part of a wire winding, from the joining tool into the stator.

The longitudinal axis of the component is often the axis of symmetry of the component or the rotational or central axis of the respective component or of the electric motor. The longitudinal axis is often parallel to the longitudinal extent of the respective grooves.

In a preferred embodiment of the proposal is provided that the at least one electrical conductor is introduced together with the insulating paper in a relative to the longitudinal axis of the component predominantly axial or radial movement in the Nuträum.

Furthermore, it is provided that the insulating paper is folded in a U-shape or V-shape, so that it forms a first leg and a second leg, and is pushed onto the at least one electrical conductor such that these (r) between the legs of insulating paper is located. In an advantageous embodiment, it is provided that the component has a plurality of Nuträumen, in each of which at least one electrical conductor is introduced.

Clever way is provided that in each groove space of the component, a plurality of electrical conductors are introduced.

In a further preferred embodiment it is provided that a respective separate insulating paper is introduced into each groove space of the component.

Furthermore, it is advantageously provided that the insulating paper during insertion into the groove space mechanically shields the electrical conductor relative to the component.

Advantageously, it is provided that the insulating paper completely lines the groove space after insertion.

Furthermore, it is advantageously provided in the proposal that the insulating paper is pushed onto the electrical conductor, while the electrical conductor is located in a joining tool.

In a preferred embodiment of the proposal it is provided that the electrical conductor is introduced together with the insulating paper by means of a slider of the joining tool in the groove space.

Furthermore, it is provided that the electrical conductor is introduced together with the insulating paper by means of a moving along a longitudinal axis, widening with respect to the longitudinal axis joining tool in the groove space.

Furthermore, the object according to the invention is achieved by a method for introducing an insulating paper into at least one groove space of an insulating paper. solved a component, in particular a rotor or stator, an electric motor, wherein the groove space is provided to receive at least one electrical conductor. In this case, provision is made in particular for the at least one electrical conductor, for example as part of a wire winding, to be inserted in one of a plurality of receiving spaces of a joining tool, followed by an insulating paper, in particular in a movement substantially perpendicular to the longitudinal extent of the at least one electrical conductor is pushed onto this in the receiving space, after which the joining tool with the at least one electrical conductor and the insulating paper is positioned on or in the component and thereafter the at least one electrical conductor together with the insulating paper in one, relative to the longitudinal axis of the rotor or stator predominantly radial Movement is moved from the receiving space of the joining tool in the groove space of the rotor or stator.

In an advantageous embodiment, it is provided that before the at least one electrical conductor is moved from the receiving space into the groove space, the receiving space is reduced.

Furthermore, the object of the invention is achieved by a system for positioning at least one insulating paper on at least one electrical conductor of a stator or rotor, the system comprising a joining tool having a plurality of receiving spaces and an insulating paper insertion device, the receiving spaces are provided for each at least one electrical conductor and the Isolierpapiereinbringvorrichtung is arranged laterally next to the joining tool such that it at least at least one insulating paper in the receiving space so penetrated that the at least one electrical conductor is covered in the receiving space of the insulating paper.

In this context, it is particularly pointed out that all features and properties described in relation to the system, but also methods, can also be applied mutatis mutandis with regard to the formulation of the method according to the invention and can be used within the meaning of the invention. The same also applies in the opposite direction, that is to say that structural features which are in accordance with the invention are only considered and claimed within the scope of the claims of the system and are likewise part of the disclosure.

In the drawing, the invention is shown schematically in particular in several embodiments. Show it:

Fig. La, lb, lc, 3a each in a schematic plan view different steps of a first embodiment of the invention

process

Fig. Ld is a detail of Fig. Lb

2a, 2b, 2c, 2f, 3a each in a schematic plan view different steps of a second embodiment of the invention

process

Fig. 2d detail of Fig. 2b

Fig. 2e is a detail of Fig. 2c

Fig. 3b shows a detail of Fig. 3a In the figures, the same or corresponding elements are denoted by the same reference numerals and therefore, if not appropriate, will not be described again. To distinguish a plurality of similar objects, letters (for example, Ia, Ib, etc.) are added to the respective reference characters. The disclosures contained in the entire description is mutatis mutandis to the same parts with the same reference numerals or identical component names transferable. Also, the position information selected in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to a new position analogous to the new situation. Furthermore, individual features or feature combinations from the different exemplary embodiments shown and described can also represent separate, inventive or inventive solutions.

In FIG. 1a, the reference numeral 5 shows a joining tool. The joining tool 5 serves to receive the wire winding produced at the upstream location. The wire winding consists at least of a continuous electrical current-conducting wire, but preferably of a plurality of wires, which, in the respective passage through a groove 31 of the component 3 (see, for example, Figure lc) forms an electrical conductor 4.

At its outer edge, the joining tool 5 has a plurality of radially inwardly extending, groove-like receiving spaces 51, 51a, 51b. Between the receiving spaces 51a and 51b is the baffle 50th

In the receiving spaces at 51 a, 51 b are already a plurality of electrical conductors 4. The joining tool 5 shown here is rotationally symmetrical about its longitudinal axis 54, around which the joining tool 5 is also rotatable (see arrow 55). The receiving chambers 51, 51a, 51b are located on the outside of the cylinder-like joining tool 5 and extend over its entire height. The longitudinal extent of the groove-like receiving spaces 51, 51 a, 51 b is oriented parallel to the longitudinal axis 54.

All receiving spaces 51, 51 a, 51 b are filled with corresponding electrical conductors 4. Below the joining tool 5, the insulating paper positioning device 6 is shown schematically here. It has a feed channel 60 into which the isolated, U- or V-prefolded insulating papers 2, 2a are introduced. The object of the insulating paper positioning device 6 is to introduce the conveyed insulating papers 2, 2a into the receiving spaces 51d such that the respective legs, the first leg and the second leg of the insulating paper between the electrical conductors 4 and the respective guide plates 50c and 50d are positioned.

There is provided a relative movement between the insulating paper position device 6 and the joining tool 5 such that the insulating paper position device 6 reaches each receiving space 51 of the joining tool 5. In the embodiment shown here, the joining tool 5 is rotatable about the rotational axis or longitudinal axis 54 and thus able to position each receiving space 51 at the end of the feed channel 60 insulating paper positioning device 6.

In the direction of rotation 55 after the insulating paper position device 6 it can be seen that in the respective receiving spaces 51, the insulating paper 2 has been introduced, which takes place for example by compressed air or by a mechanical slide. In the direction of rotation 55 in front of insulating paper positioning device 6, the electrical conductors 4 are still unprotected. In Figure lb, and enlarged in Figure ld, the situation is shown when all the receiving spaces 51 are filled with a corresponding insulating paper 2. The U-shaped folded insulating paper 2 has a first leg 21 and a second leg 22, which are interconnected by the web 20. The web 20 is arranged at the radially outer end of the joining tool.

The first leg 21 is located between the / n electrical conductor / n 4 and the baffle 50 a, the second leg 22 is located between the / n electrical conductor / n 4 and the second baffle 50 b.

Thereafter, the joining tool 5 is brought to the component 3, here for example a stator 30, or introduced into it, as shown in FIG. 1c. The longitudinal axis 54 of the joining tool 5 is identical to the stator axis 33. The component 3 shown here, a stator 30 or formed from individual sheets stator 30 has a plurality of grooves 31 which are radially oriented and open on the inside of the stator. Each individual groove 31 forms a groove space 32. Between the grooves 31 are stator webs 34.

The joining tool 5 shown in Figure la, lb, lc remains constant in its outer diameter. It has for each receiving space 51, a slide, which allows the unit of electrical conductor / n 4 and 2 pushed insulation paper in the radial direction, here radially outward from the respective receiving space 51 of the joining tool 5 out into the respective groove space 31 of the device 3 / Stators 30 to push (indicated by the arrows 56a, 56b). It is clear that the number of the receiving spaces 51 and the Nuträume 31 are coordinated.

The fully assembled stator 30 thus produced is shown in FIG. 3a. For this purpose, a detail is shown in FIG Joining tool 5 outer web 20 of the insulating paper 2 is now at the bottom of the groove 31 and here isolates the electrical conductors 4 against the stator 30. The first leg 21 is located between the / n electrical conductor / n 4 and the stator bar 34 b, the second leg 22 is located between the / n electrical conductor / n numeral 4 and the stator bar 34 a.

The second exemplary embodiment of the method according to the invention, which is shown in FIGS. 2a, 2b, 2c and 2f, is identical in many respects to what has been described above with regard to FIGS. 1a, 1b, 1c. To avoid repetition, only the differences are described.

In contrast to the first embodiment according to FIG. 1 a, the joining tool 5 shown in FIG. 2 a has a variable outer diameter.

In Figure la, the joining tool 5 is formed like a ring. In the embodiment shown in Figure 2a, the joining tool 5 is formed of a plurality of ring-segment-like, movable guide plates 52, which are relative to the longitudinal axis 54, in their position radially variable. This results in that the outer diameter of the joining tool 5 is variable according to Figure 2a. Between these movable baffles 52,52a, 52b, 52c, the receiving spaces 53,53 a, 53 b is formed. Due to the radial position change of the movable baffles 52,52a, 52b, 52c, the volume or the size of the receiving space 53 changes. This circumstance will be used in this embodiment.

Furthermore, it is provided in the embodiment shown here to use a V-shaped pre-folded insulating papers 2, the open ends of which are further apart, as the ends connected by the web. Due to the variability of the outer diameter of the joining tool 5, the insulating paper 2 is pushed in the state on the head 4, in which the joining tool 5 has the larger or largest diameter. This is achieved in that the ring-segment-like guide plates 52 a, 52 b, 52 c are moved radially outward. This also expands the distance at their radially outer ends, in the region of the receiving spaces 53 and thus facilitates the introduction of the insulating papers 2. Ultimately, thereby the gap between the guide plates 52 and the / n electrical conductor / n 4 is increased accordingly.

In FIG. 2 b, the state is shown that the joining tool 5 still has the larger or largest outer diameter and the insulating paper 2, as described, is pushed onto the respective electrical conductors 4 in all receiving spaces 53.

The outer diameter of the joining tool 5 is now reduced again by the movable guide plates 52 are moved radially inwardly, as shown by a plurality of arrows 57.

This retraction movement 57 also reduces the receiving space 53, i. the gap between the conductors 4 and the baffles 52 decreases, which is held to a deferred insulating paper 2 and on the other hand, the accumulation of electrical conductors 4 is compressed.

Figure 2c shows the state of the joining tool 5 with the smallest possible outside diameter. The outer diameter is reduced to such an extent that the joining tool 5 can be inserted into the stator 30 according to FIG. 2f. It can be clearly seen that the situation in FIG. 2c corresponds to the situation according to FIG. 1b and the situation according to FIG. 2f corresponds to that according to FIG. The final result of the Persian method according to the second embodiment is again shown in FIGS. 3a and 3b.

The claims now filed with the application and later are without prejudice to the attainment of further protection.

If, on closer examination, in particular also of the relevant prior art, it appears that one or the other feature is beneficial for the purpose of the invention, but not crucial, it is of course already desired to have a formulation which is such a feature , in particular in the main claim, no longer having. Such a sub-combination is also covered by the disclosure of this application.

It should further be noted that the embodiments and variants of the invention described in the various embodiments and shown in the figures can be combined with one another as desired. Here, one or more features are arbitrarily interchangeable. These feature combinations are also disclosed with.

The referenced in the dependent claims refer back to the further development of the subject of the main claim by the features of the respective subclaim. However, these are not to be understood as a waiver of obtaining independent, objective protection for the features of the dependent claims.

Features which have been disclosed only in the description or also individual features from claims which comprise a plurality of features can at any time be taken over as being of essential importance for the purpose of differentiation from the prior art in the independent claim (s), even then, if such characteristics have been mentioned in relation to other features. achieve particularly favorable results in relation to other characteristics.

Claims

Claims:

1. A method for introducing an insulating paper in at least one groove space of a component, in particular a rotor or stator, an electric motor, wherein the groove space is provided to receive at least one electrical conductor, wherein first the insulating paper is pushed onto the at least one electrical conductor and then the at least one electrical conductor is introduced into the groove space together with the insulating paper.

2. The method according to claim 1, characterized in that the

Insulating paper in one, based on the longitudinal axis of the component or a joining tool, predominantly axial or radial movement is pushed onto the at least one electrical conductor. Method according to one of the preceding claims, characterized in that the at least one electrical conductor is introduced together with the insulating paper in a relative to the longitudinal axis of the component predominantly axial or radial movement in the groove space.

Method according to one of the preceding claims, characterized in that the insulating paper is U-shaped or V-shaped folded so that it forms a first leg and a second leg, and is pushed onto the at least one electrical conductor, that ( r) is located between the legs of the insulating paper.

Method according to one of the preceding claims, characterized in that the component has a plurality of Nuträumen, in which in each case at least one electrical conductor is introduced.

Method according to one of the preceding claims, characterized in that the insulating paper during insertion into the groove space mechanically shields the electrical conductor relative to the component and / or the insulating paper completely lined after insertion of the groove space.

Method according to one of the preceding claims, characterized in that the insulating paper is pushed onto the electrical conductor, while the electrical conductor is in a joining tool and / or the electrical conductor is introduced together with the insulating paper by means of a slider of the joining tool in the groove space and / or the electrical conductor together with the insulating paper by means of a moving along a longitudinal axis, with Be zug on the longitudinal axis expanding joining tool is introduced into the groove space.

8. A method for introducing an insulating paper in at least one groove space of a component, in particular a rotor or stator of an electric motor, wherein the groove space is provided to receive at least one electrical conductor, in particular according to one of the preceding claims, characterized in that the at least one electrical conductor, for example, as part of a wire winding, is inserted into one of a plurality of receiving spaces of a joining tool, after which an insulating paper, in particular in a movement substantially perpendicular to the longitudinal extent of the at least one electrical conductor is pushed onto this in the receiving space, thereafter the Joining tool with the at least one electrical conductor and the insulating paper is positioned on or in the component and thereafter the at least one electrical conductor together with the insulating paper in a, relative to the longitudinal axis of the rotor or stator predominantly radial movement ung, is moved from the receiving space of the joining tool in the groove space of the rotor or stator.

9. The method according to any one of the preceding claims, characterized in that before the at least one electrical conductor is moved from the receiving space into the groove space of the receiving space is reduced.

10. A system for positioning at least one insulating paper on at least one electrical conductor of a stator or rotor, wherein the system comprises a joining tool having a plurality receiving chambers and a Isolierpapiereinbringvorrichtung, the receiving chambers are provided for each to receive the at least one electrical conductor and the Isier llerpapiereinbringvorrichtung laterally adjacent to the joining tool is arranged such that it penetrates at least one insulating paper in the receiving space such that the at least one electrical conductor is hidden in the receiving space of the insulating paper.