DE102014222376A1 - Stator winding for an electric machine, electric machine with the stator winding, and method for its production - Google Patents

Stator winding for an electric machine, electric machine with the stator winding, and method for its production Download PDF

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Publication number
DE102014222376A1
DE102014222376A1 DE102014222376.8A DE102014222376A DE102014222376A1 DE 102014222376 A1 DE102014222376 A1 DE 102014222376A1 DE 102014222376 A DE102014222376 A DE 102014222376A DE 102014222376 A1 DE102014222376 A1 DE 102014222376A1
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Prior art keywords
wire
sections
predetermined
winding
width
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DE102014222376.8A
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German (de)
Inventor
Philipp Schlag
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE102014222376.8A priority Critical patent/DE102014222376A1/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines

Abstract

The invention relates to a stator winding for an electrical machine, in particular for an electric motor, and to a method for the production thereof. The stator winding has a coil comprising a bundle (1) of a plurality of wire sections (2), wherein the individual wire sections (2) of the plurality of wire sections (2) of the bundle (1) each in one of a plurality, along a Winding height direction (Y) superposed layers (3) are arranged, and a cross section of a wire portion (2) of a layer (3) has a predetermined width (B) along a winding width direction (X), and the predetermined width (B) of a wire portion of a Layer (3) is different from a predetermined width (B) of a wire section (2) of another layer (3).

Description

  • The present invention relates to a stator winding for an electric machine, in particular an electric motor.
  • Furthermore, the invention relates to an electric machine, in particular an electric motor, with such a stator winding and a vehicle with such an electric machine.
  • Furthermore, the invention relates to methods for producing such a stator winding and for producing such an electrical machine.
  • An electrical machine embodied as an electric motor usually comprises a stationary component called a stator, and a rotating component called a rotor. In this case, a force which is exerted on the rotor by a magnetic field which is generated by current-carrying conductors of a coil arranged in the stator or several coils arranged in the stator is converted into a rotating movement of the rotor. In a synchronous machine, a constantly magnetized rotor, a so-called rotor, is driven synchronously by a moving magnetic rotating field in the stator, wherein the magnetic field in the rotor can be generated by permanent magnets or external electromagnetic excitation. In general, the coils consist of several turns of a conductor, such as a copper enamel wire, which can first be wound on a bobbin.
  • In one way of producing electric motors, the coils or groups of coils, which may consist of two or more coils, after the winding of the conductor, in particular of the wire, on the bobbin, by means of a corresponding tool, for example a Spuleneinziehmaschine, in designated grooves introduced in the stator.
  • In order to achieve a high efficiency of the electric motor, it is advantageous to fill the groove as closely as possible with wire material or with form bars.
  • By introducing wires with a large conductor cross-section, the space of the groove is usually well filled, but in the case of a large conductor cross-section of the individual, densely packed wires, a proximity effect or Stromverdrängungseffekt occurs, creating a Stromeinschnürung between two closely adjacent wires under the influence of alternating currents due to the magnetic leakage flux between them.
  • However, if wires are used with small conductor cross-sections, the individual wires are usually arranged irregularly in the groove, so that between the individual wires, a gap is formed, which is initially filled with air. For this reason, the space in the grooves is not maximized, thereby reducing the efficiency of the electric machine. To better fill the space in the grooves with conductor material, the wires can be pressed with small conductor cross-sections simultaneously after they have been stored, for example by means of Spuleneinziehmaschine in the groove. In this case, however, the individual wires are pressed against one another in an undefined manner, as a result of which damage to the lacquer or insulation layer, and thus short-circuits between the individual wires, may occur at some points. Furthermore, under certain circumstances, optimal space utilization can not be achieved in this case if the wires partly cross each other.
  • From the EP 2 112 747 A1 For example, an electric machine is known in which a set of a plurality of different cross-sectional shape bars together form a coil which is inserted into a groove of a stator to optimize the groove filling, wherein the forming bars are electrically insulated from each other by means of an insulating material.
  • Furthermore, in the EP 2 648 317 A1 discloses a method of simplifying the winding of a wire around a stator core and increasing the fill level. In this case, individual conductor wire bundles are formed, which are enclosed by a flexible, electrically insulating material, and a plurality of the individual conductor wire bundles introduced into a groove of the stator, wherein the shape of the individual conductor wire bundles can adapt to the shape of the respective groove.
  • In the US 2002/0043886 A1 there is described a stator for an electric machine and a method of manufacturing the same, in which a plurality of mold bars are inserted into a groove of the stator with the aim of increasing a degree of filling of the groove with the forming bars. In the method, the raw material of the forming bars is formed by pressing either before inserting the forming bars into the groove of the stator by means of rolling, or after insertion into the groove of the stator to form the forming bars.
  • At one in the FR 2 846 806 In accordance with the disclosed method, the starting material of forming bars is subjected to a stamping operation in order to adapt the formed bars to a shape of the grooves of a stator.
  • If the winding of the stator of the electric machine, in particular of the electric motor, has shaped bars which are introduced into the slots of the stator, a relatively high degree of filling of the slots of the stator can generally be achieved. However, this technology has the disadvantage that every single one of the shaped rods has to be bent and interconnected after insertion into the groove, and each individual shaped rod usually has a large cross section.
  • It is an object of the present invention to provide a stator winding and a method of manufacturing the same by which an improved space utilization of the slots of a stator is ensured, and thus the efficiency of an electric machine having the stator winding can be increased.
  • These objects are achieved by a stator winding having the features of patent claim 1 and by a method for producing a stator winding having the features of patent claim 12.
  • Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.
  • A stator winding according to the invention for an electrical machine, in particular for an electric motor, comprises a coil which comprises a bundle of a plurality of wire sections, preferably substantially rectilinear, wherein the individual wire sections of the plurality of Wire sections of the bundle are each arranged in one of a plurality of layers arranged on a winding height direction, and a cross section of a wire portion of a layer has a predetermined width along a winding width direction, and the predetermined width of a wire portion of a first layer different from a predetermined width of a wire portion of a second layer is different from the first layer.
  • Due to the different predetermined widths of individual wire sections, it is possible to significantly increase the Nutfüllgrad or the mechanical filling factor of a groove of a stator of the electric machine, because the width of a layer by suitable selection of the predetermined widths of the wire sections located in this position to the cross section of Groove can be adjusted. As a result, a higher overall efficiency of the electric machine, in particular of the electric motor can be achieved. At the same time, the heat dissipation from the winding is improved by increasing the mechanical filling factor of the groove.
  • Since the coil of the stator winding comprises a bundle of wire sections, ie a bundle of thin, slightly flexible electrical conductors, and no forming bars as in the prior art, bending of the sections of the wires not covered by the bundle may occur Furthermore, a minimum winding head height can be provided, whereby manufacturing costs and heat losses can be reduced.
  • According to an embodiment, in one layer, a plurality of wire sections may be arranged side by side along the winding width direction, and each of the plurality of wire sections of a layer may have the same predetermined width.
  • Furthermore, a cross section of a wire section of a layer may have a predetermined height along the winding height direction, wherein the predetermined height of a wire section of the first layer is different from a predetermined height of a wire section of the second layer.
  • Preferably, the same number of wire sections is arranged in each of the several layers. In this case, the wire portions of the plurality of sheets may be formed one after another by reforming a number of wires corresponding to the number of wire portions of the sheets.
  • According to one embodiment, the bundle is adapted to be received in a groove of a stator of the electric machine, wherein the predetermined width and the predetermined height of a wire portion of a layer depending on a predetermined cross-section of the groove and a predetermined position of the layer are selected in the groove.
  • Preferably, a sum of the widths of the wire sections corresponds to a position of a width of the groove at the predetermined position in order to achieve a high mechanical filling factor of the groove.
  • According to one embodiment, the wire sections are formed by forming a wire having a predetermined cross section.
  • In the event that the coil of the stator winding is first wound, and only then inserted into a groove of a stator, the wire sections may be at least partially fixed by means of a fixing means to facilitate insertion into the groove of the stator. In this case, the front ends of the wire sections are preferably not fixed in order to ensure a certain elasticity and deformability when passing through an end narrowing of the groove.
  • A positive side effect of fixing the individual wire layers by means of a plastic coating material is the simultaneous electrical insulation of the wires from the stator. Thus, the previous separately added groove insulation from a paper-plastic mixture may be omitted.
  • According to an embodiment, a height of the individual layers along the winding height direction may decrease, and a width of the individual layers increase along the winding height direction.
  • An electric machine according to the invention, in particular an electric motor, comprises a stator, which has a groove, and a stator winding described above, wherein the bundle of the coil of the stator winding is received in a form-fitting manner in the groove of the stator.
  • The vehicle according to the invention, in particular motor vehicle, preferably hybrid or electric vehicle, has the above-described electrical machine according to the invention.
  • An inventive method of manufacturing a stator winding for an electrical machine, in particular for an electric motor, wherein a coil of the stator winding comprises a cluster of a plurality of wire sections of the wire, the individual wire sections of the plurality of wire sections of the bundle, respectively are arranged in one of a plurality of layers stacked along a winding height direction, and at the cross section of a wire portion of a layer has a predetermined width along a winding width direction, providing a wire having a predetermined cross section comprises predetermining a first layer in which a first portion of the wire, and a first intended width of the first portion of the wire, a predetermining a second layer in which a second portion of the wire is to be arranged, and a second provided width of the second portion of the D Rahts, wherein the first predetermined width is different from the second predetermined width, reshaping the cross section of the first portion of the wire to form a first wire portion, which has the predetermined first width, reshaping the cross section of the second portion of the wire forming a second wire section having the predetermined second width, and disposing the first wire section in the first layer and the second wire section in the second layer.
  • According to an embodiment, in one layer, a plurality of wire sections may be arranged side by side along the winding width direction, the method further comprising: predetermining a layer in which a plurality of sections of the wire are to be arranged and an intended width of each of the plurality of sections of the wire; Cross sections of the plurality of sections of the wire to form a plurality of wire sections, which have the predetermined width, and arranging the plurality of wire sections in the position next to each other along the winding width direction.
  • Furthermore, a cross-section of a wire portion of a layer may have a predetermined height along the winding height direction, the method further comprising: predetermining a first intended height of the first portion of the wire, setting a second intended height of the second portion of the wire, the first predetermined Height is different than the second predetermined height, wherein reshaping the cross section of the first portion of the wire further comprises reshaping to form the first wire portion having the predetermined first height, and reshaping the cross section of the second portion of the wire further comprises reshaping to form the second wire section having the predetermined second height.
  • Preferably, in each of the plurality of layers, the same number of wire sections are obtained, which are obtained by reshaping the cross section of sections of the wire.
  • The trade of the spool may be intended to be received in a groove of a stator of the electric machine, having an intended width and an intended height of a portion of the wire in dependence on a predetermined cross section of the groove and a predetermined position of the position in the groove are predetermined, the cross section of the portion of the wire is formed to form a wire portion having the predetermined width and the predetermined height, and the wire portion is arranged in the predetermined position.
  • Further, a layer may be set in which a plurality of sections of the wire are to be arranged, and the designated widths of the plurality of sections of the wire may be set such that the sum of the intended widths corresponds to a width of the groove at the predetermined position, the cross sections the plurality of sections of the wire are formed to form a plurality of wire sections with the predetermined widths, and the plurality of wire sections are arranged in the predetermined position.
  • According to one embodiment, the wire sections can be fixed at least in sections by means of a fixing means.
  • The forming of the wire can be done by means of a forming device having a pair of rollers or formed as a press.
  • The wire sections of the bundle formed by the forming of the wire can be arranged in a winding template.
  • The process of forming the wires does not cause additional time and is easily integrated into a winding process using the winding template. In addition, a process-reliable and wire-sparing introduction of the coil of the stator winding in the groove of the stator can be realized.
  • An inventive method for producing an electrical machine, in particular an electric motor, comprises a method described above for producing a stator winding and arranging the bundle of the coil of the stator winding in a groove of a stator of the electric machine.
  • Preferred embodiments of the invention are explained below by way of example with reference to FIGS.
  • Show it:
  • 1 FIG. 2 shows a schematic cross-sectional view of a portion of an embodiment of a stator winding according to the invention, FIG.
  • 2 1 is an illustration for explaining a step of an embodiment of a method for producing the stator winding according to the invention;
  • 3 another illustration for explaining the step of the embodiment of the method for producing the stator winding according to the invention, and
  • 4 a representation for explaining a further step of an embodiment of the method for producing the stator winding according to the invention.
  • 1 is a schematic cross-sectional view of a portion or section 1 an embodiment of a stator winding according to the invention, and in particular a cross-sectional view of a portion or a portion of a coil of the stator winding. The stator winding has an electrically conductive wire which has been converted into coils by a winding method, each having two or more coils, the coils each having a plurality of individual turns. In this case, the ends of the individual coil groups are electrically interconnected in a known manner to form the stator winding.
  • In other embodiments, the coil or coil group may comprise a plurality of individual turns of an electrical conductor, wherein the electrical conductor has a plurality of individual electrically conductive wires whose respective ends are electrically connected to each other so that the individual electrically conductive wires in series are switched.
  • The electrically conductive wire or the plurality of electrically conductive wires is provided with an electrically insulating material (not shown in FIG 1 ), for example, a paint insulation, for electrically insulating a portion of a wire or a wire portion of other portions of the wire or other wire sections provided.
  • In 1 is in particular a cross section of a partial area or of a section 1 a coil of the stator winding, which is intended to be in a single groove 4 a plurality of slots of a stator of an electric machine such as an electric motor (not shown in FIG 1 ) or already in the single groove 4 of the stator is arranged. In the present embodiment, the section 1 the coil of the stator winding in a wedge-shaped groove 4 of the stator which widens in a radial direction Y of the stator.
  • The section 1 the coil of the stator winding has a wire bundle 1 or an arrangement 1 from a variety of wire sections 2 or parts or components 2 a single wire or a wire bundle 1 or an arrangement 1 from a variety of wire sections 2 or portions of a plurality of wires, wherein the Drahlabschnitte 2 substantially rectilinear in a direction perpendicular to a plane of the drawing 1 run. The individual wire sections 2 of the wire bundle 1 are in respective locations 3 of the wire bundle 1 which are arranged one above the other along a first direction Y or along a winding height direction Y, which in the present case corresponds to the radial direction Y of the stator, wherein by way of example in FIG 1 each a row of four adjacent to each other, along a second direction X and along a winding width direction X, which is different from the first direction Y, arranged wire sections 2 a respective situation 3 form. In other embodiments of the invention, a layer 3 also five or more adjacent to each other along the winding width direction X arranged wire sections 2 or two or three adjacent to each other along the winding width direction X arranged wire sections 2 include.
  • To a high degree of filling or a high mechanical filling factor of the groove 4 of the stator is a cross-section of the wire bundle 1 to the cross section of the groove 4 adapted to the stator, in which the wire bundle 1 should be introduced or in which the wire bundle 1 is arranged. These are the cross sections and the number of wire sections 2 the individual layers 3 selected or predetermined such that in an arrangement of the wire bundle 1 in the groove 4 of the stator a positive connection between the wire bundle 1 and the groove 4 of the stator takes place.
  • In particular, the cross sections of the wire sections 2 a particular situation 3 such a predetermined width B that the sum of the widths B of the wire sections 2 the respective situation 3 substantially equal to a width of a respective predetermined portion of the groove 4 the stator is in which the respective position 3 should be arranged or is. Here are the wire sections 2 a particular situation 3 preferably arranged such that adjacent the wire sections 2 the respective situation 3 abut each other.
  • Due to the above-mentioned widening in the radial direction wedge-shaped cross section of the groove 4 of the stator, for example, is the width of a portion of the groove 4 low near the central axis of the stator, the width of the groove 4 increases with increasing distance from the central axis.
  • Consequently, a first layer 3-1 of the wire bundle 1 or section 1 the coil of the stator winding on a small width, while a last layer 3-4 of the wire bundle 1 or section 1 the coil of the stator winding has a large width. As in the present embodiment each layer 3 the same number of wire sections 2 have, are the predetermined widths B of the wire sections 2 the first location 3-1 less than the predetermined widths B of the wire sections 2 the last situation 3-4 ,
  • It takes in particular, as in 1 shown starting from the first position 3-1 with increasing winding height Y of the section 1 the coil of the stator winding the width of the layers 3 , where by way of example the layers 3-2 . 3-3 in the 1 are designated, up to the last position 3-4 to, and accordingly also the width of the individual wire sections 2 the layers 3 increases with increasing winding height Y.
  • This adaptation of the cross sections of the individual wire sections 2 is by a below with reference to the 2 and 3 described forming a wire or wire section used as a starting material for forming the coil of the stator winding 5 achieved, which has a predetermined, preferably circular cross-section.
  • By this transformation to adapt the width B of a wire section to the groove 4 the stator also becomes the height H of the wire 5 amended. Consequently, the wire sections 2 a location 3 a height H, which is different from a height H of the wire sections 2 another situation 3 is.
  • In particular, the wire sections 2 the first location 3-1 the highest height H, and the wire sections of the last layer 3-4 the lowest height H on, with the height of each wire section 2 the layers 3 starting from the first position 3-1 decreases with increasing winding height Y.
  • To the arrangement of the individual wire sections 2 set before this into the groove 4 The stator can be inserted, for example, a template 9 (please refer 4 ) are provided, the cross-sectional shape of the cross section of the groove 4 of the stator, and in which the wire sections 2 stored or arranged after the transformation.
  • The 2 and 3 show representations for explaining a step of a method for producing the stator winding according to the invention, and in particular for producing a coil of the stator winding.
  • According to the invention, the cross sections of the individual wire sections 2 of in 1 shown wire bundle 1 , which is intended to be in the groove 4 of the stator, depending on their intended position within the groove 4 the stator individually or simultaneously all wire sections 2 which are intended for a single location 3 to be arranged, reshaped before the wire or the wires of a layer 3 be wound up.
  • The deformation can, for example by means of in the 2 and 3 shown forming device 6 respectively. The forming device 6 has one or more pairs, for example, three pairs as in 2 represented, from opposite, rotatably mounted rollers or rollers 7 on. In this case, a distance between the two rollers 7 a respective pair, as represented by the in 2 indicated arrow, can be adjusted from each other.
  • To form a respective wire section 2 becomes a starting material used electrically conductive wire 5 by means of the pair or by means of the several pairs of rollers 7 the forming device 6 rolled, whereby a dimension, in particular a height of a cross section of the wire 5 is reduced while at the same time a width of the wire 5 is increased to the wire section 2 with the predetermined height H and the predetermined width B to form.
  • As in particular from 3 can be seen, the formation of wire sections 2-1 . 2-2 . 2-3 . 2-4 a location 3 occur simultaneously when multiple wires used as the starting material 5-1 . 5-2 . 5-3 . 5-4 by means of the pair or by means of the several pairs of rollers 7 the forming device 6 rolled at the same time. In this case, the individual wire sections 2-1 , ..., 2-4 Being in a position to arrange 3 are provided, after the forming of the wires 5-1 , ..., 5-4 by means of a guide device 8th be guided so that adjacent the wire sections 2-1 , ..., 2-4 abut each other and the undersides of the wire sections 2-1 , ..., 2-4 lie in one plane. In this state, the wire sections 2-1 , ..., 2-4 that for a single location 3 of the wire bundle 1 are provided, by means of a fixing agent, such as a plastic material, around the wire sections 2-1 , ..., 2-4 is sprayed, or by means of an electrically insulating adhesive on the wire sections 2-1 , ..., 2-4 is applied, fixed to a re-deformation of the wire sections 2-1 , ..., 2-4 when inserted into the groove 4 to prevent the stator.
  • In the case of a forming device with only a pair of opposing rollers 7 will be the distance of the two rollers 7 depending on the intended position of the portion of the wire to be machined 5 or the wires 5-1 , ..., 5-4 in the groove 4 of the stator adjusted so that the distance between the rollers 7 the height H of the corresponding wire section 2 or the corresponding wire sections 2-1 , ..., 2-4 of the wire bundle corresponds.
  • In the case of a forming device with several pairs of opposing rollers 7 the deformation of the wire takes place 5 gradually, using each of the roller pairs 7 the height of the wire 5 is reduced, and the distance of the roller pair 7 with which the wire 5 last processed, depending on the intended position of the portion of the wire to be machined 5 or the wires 5-1 , ..., 5-4 is set in the groove of the stator such that the distance between the rollers 7 the height H of the corresponding wire section 2 or the corresponding wire sections 2-1 , ..., 2-4 of the wire bundle corresponds.
  • In one embodiment, not shown, the forming device may also have four of the rollers or rollers through which the wire 5 is processed simultaneously. In this case, the axes of rotation of a first pair of rollers are preferably arranged parallel to each other, and the axes of rotation of a second pair of rollers are arranged parallel to each other and perpendicular to the axes of rotation of the first pair of rollers. In this way, the cross section of the shaped wire section 2 be formed so that it has a rectangular shape, whereby the mechanical filling factor of the groove 4 of the stator can be further increased.
  • In another embodiment, not shown, the deformation of the wire used as the starting material 5 in the corresponding wire sections 2 with the respective predetermined height H and the respective predetermined width B also be carried out using a pressing tool or using any other suitable tool.
  • 4 shows representations for explaining a further step of an embodiment of a method for producing the stator winding according to the invention, in particular for producing a coil of the stator winding. 4a shows a side view of a winding template 9 , on which a part of the turns of the stator winding, in particular a part of the turns of a coil of the stator winding is wound, and 4b shows a sectional view of 4a along the through in the 4 specified directions X and Y plane spanned.
  • The winding template 9 has a cross section which corresponds to the cross section of the corresponding groove 4 of the stator corresponds.
  • The deformed wire 5 , which the respective wire sections 2 having the respective predetermined heights H and widths B, the winding template 9 supplied, and in the winding template 9 becomes a wire section 2 arranged or stored at a position that the intended position of this wire section 2 in the groove 4 of the stator corresponds. This is the winding template 9 rotated continuously about its axis along the X direction, and the next wire section 2 with the same or a different predetermined height H in the winding template 9 stored at a position that the intended position of the next wire section 2 in another groove 4 of the stator corresponds. The winding heads connect 10 the exciter coil the respective sections 1 , which are intended to be in the grooves 4 of the stator.
  • If the wires 5-1 , ..., 5-4 a location 3 can be reshaped simultaneously, the formed wires 5-1 , ..., 5-4 which the respective wire sections 2-1 , ..., 2-4 a location 3 having the predetermined height H and the predetermined width B, also at the same time in the winding template 9 are stored at positions that the intended positions of the wire sections 2-1 , ..., 2-4 a location 3 in the groove 4 of the stator. This is the winding template 9 rotated continuously about its axis along the X direction, and the next wire sections 2-1 , ..., 2-4 a location 3 with the same or a different predetermined height H in the winding template 9 stored at positions that the intended positions of these next wire sections 2-1 , ..., 2-4 this location 3 in the other groove 4 of the stator.
  • After like in the 4c which is one of 4a corresponding side view shows, and 4d which is one of 4b corresponding side view shows, shown, the coil completely on the winding template 9 was wound up, the respective sections 1 the stator winding, in particular the respective sections 1 the coil of the stator winding in the respective grooves 4 of the stator, and the respective ends of the wires are preferably electrically connected to each other simultaneously, for example, by a spot welding method.
  • To a reverse deformation of the individual wire sections 2 when inserted into the groove 4 To prevent the wire sections 2 the individual layers 3 be fixed before introduction by means of a fixing agent. In this case, the fixing agent may, for example, a plastic material which is sprayed around the wires, or an adhesive which is applied to the wires and adheres to the wires by heating.
  • The groove 4 of the stator usually has at its front ends a constriction, through which the wire bundle 1 must be drawn. To the wire bundle 1 to be able to introduce into the groove by this constriction, is a certain elasticity and deformability of at least a portion of the wire bundle 1 required so that the wire sections 2 a location 3 preferably only partially or in sections are fixed to each other, and in particular on the front side of the wire bundle 1 not be fixed to the insertion of the wire bundle 1 in the groove 4 to facilitate the stator.
  • Furthermore, the fixing may also be done using appropriate clips which are inserted during the insertion of the wire bundle 1 in the groove 4 be removed from the stator.
  • In another embodiment, after the wire 5 has been reshaped so that he the respective wire sections 2 having the respective predetermined height H and the respective predetermined width B, the respective wire sections 2 also directly in the groove 4 of the stator are stored at the respective predetermined position by means of a needle winding technique.
  • Although a subsequent pressing of the wire bundle 1 Following the procedure described above is no longer required, at least a portion of the wire bundle 1 which layers 3 contains, where the degree of deformation of the individual wire sections 2 is very small, and whose diameter has remained almost round, be additionally pressed. In this way, the remaining, filled in these spaces, filled with air gaps between the individual wire sections 2 be compressed, whereby the mechanical filling factor can be further increased.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • EP 2112747 A1 [0009]
    • EP 2648317 A1 [0010]
    • US 2002/0043886 A1 [0011]
    • FR 2846806 [0012]

Claims (22)

  1. Stator winding for an electric machine, in particular for an electric motor, comprising a coil, which is a bundle ( 1 ) of a plurality of wire sections ( 2 ), wherein the individual wire sections ( 2 ) of the plurality of wire sections ( 2 ) of the bundle ( 1 ) in each case in one of several, along a winding height direction (Y) superimposed layers ( 3 ) are arranged, and a cross section of a wire section ( 2 ) a situation ( 3 ) has a predetermined width (B) along a winding width direction (X), and the predetermined width (B) of a wire portion (FIG. 2 ) a first layer ( 3-1 ) different from a predetermined width (B) of a wire section ( 2 ) a second layer ( 3-2 . 3-3 . 3-4 ), which differs from the first situation ( 3-1 ) is different.
  2. Stator winding according to claim 1, wherein in one position ( 3 ) several wire sections ( 2 ) are arranged side by side along the winding width direction (X), and each of the plurality of wire sections (X) 2 ) a situation ( 3 ) has the same predetermined width (B).
  3. Stator winding according to claim 1 or 2, wherein a cross section of a wire section ( 2 ) a situation ( 3 ) has a predetermined height (H) along the winding height direction (Y), and the predetermined height (H) of a wire portion ( 2 ) of the first layer ( 3-1 ) different from a predetermined height (H) of a wire section of the second layer ( 3-2 . 3-3 . 3-4 ).
  4. Stator winding according to one of claims 1 to 3, in which in each of the plurality of layers ( 3 ) the same number of wire sections ( 2 ) is arranged.
  5. Stator winding according to one of claims 1 to 4, wherein the bundle is adapted to be in a groove ( 4 ) of a stator of the electric machine, and the predetermined width (B) and the predetermined height (H) of a wire section ( 2 ) a situation ( 3 ) in dependence on a predetermined cross section of the groove ( 4 ) and a given position of the situation ( 3 ) in the groove ( 4 ) are selected.
  6. Stator winding according to claim 5, wherein a sum of the widths (B) of the wire sections ( 2 ) a situation ( 3 ) a width of the groove ( 4 ) corresponds to the predetermined position.
  7. Stator winding according to one of Claims 1 to 6, in which the wire sections ( 2 ) by forming a wire ( 5 ) are formed with a predetermined cross-section.
  8. Stator winding according to one of Claims 1 to 6, in which the wire sections ( 2 ) are fixed at least in sections by means of a fixing agent.
  9. Stator winding according to one of claims 1 to 8, wherein a height (H) of the individual layers ( 3 ) decreases along the winding height direction (Y), and a width of the individual layers ( 3 ) increases along the winding height direction (Y).
  10. Electric machine, in particular electric motor, comprising a stator, which has a groove, and a stator winding according to one of Claims 1 to 9, in which the bundle ( 1 ) of the coil of the stator winding form-fitting in the groove ( 4 ) of the stator is received.
  11. Vehicle, in particular motor vehicle, preferably hybrid or electric vehicle, comprising an electric machine according to claim 10.
  12. Method for producing a stator winding for an electric machine, in particular for an electric motor, wherein the stator winding has a coil which forms a bundle ( 1 ) of a plurality of wire sections ( 2 ), the individual wire sections ( 2 ) of the plurality of wire sections ( 2 ) of the bundle ( 1 ) in each case in one of several, along a winding height direction (Y) superimposed layers ( 3 ) are arranged, and a cross section of a wire section ( 2 ) a situation ( 3 ) has a predetermined width (B) along a winding width direction (X), and wherein the method comprises providing a wire (FIG. 5 ) having a predetermined cross-section, predetermining a first layer ( 3 ), in which a first section of the wire ( 5 ) and a first intended width (B) of the first section of the wire ( 5 ), a predetermining a second position ( 3 ), in which a second section of the wire ( 5 ) and a second intended width (B) of the second section of the wire ( 5 ), wherein the first predetermined width (B) is different from the second predetermined width (B), reshaping the cross section of the first portion of the wire (FIG. 5 ) to a first wire section ( 2 ) having the predetermined first width (B), reshaping the cross section of the second portion of the wire (FIG. 5 ) to a second wire section ( 2 ) having the predetermined second width (B) and arranging the first wire portion (FIG. 2 ) in the first situation ( 3 ) and the second wire section ( 2 ) in the second position ( 3 ).
  13. Method according to claim 12, wherein in one layer ( 3 ) several wire sections ( 2 ) are arranged side by side along the winding width direction (X), and the method further comprises: predetermining a layer ( 2 ), in which several sections of the wire ( 5 ) and an intended width (B) of each of the plural sections of the wire (FIG. 5 ), Reshaping the cross sections of the several sections of the wire ( 5 ) to several wire sections ( 2 ) having the intended width (B) and arranging the plurality of wire sections (FIG. 2 ) in a position ( 2 ) side by side along the winding width direction (X).
  14. Method according to claim 12 or 13, wherein a cross-section of a wire section ( 2 ) a situation ( 3 ) has a predetermined height along the winding height direction (Y), and the method further comprises: specifying a first intended height (H) of the first portion of the wire (FIG. 5 ), a predetermined second height (H) of the second section of the wire ( 5 ), wherein the first predetermined height (H) is different from the second predetermined height (H), wherein the reshaping of the cross section of the first portion of the wire ( 5 ) further comprises a forming around the first wire section ( 2 ) with the predetermined first height (H), and reshaping the cross section of the second section of the wire (FIG. 5 ) further comprises a forming around the second wire section ( 2 ) with the predetermined second height (H).
  15. Method according to one of claims 12 to 14, wherein in each of the several layers ( 3 ) the same number of wire sections ( 2 ) can be arranged by forming the cross-section of sections of the wire ( 5 ).
  16. Method according to one of claims 12 to 15, wherein the bundle ( 1 ) is provided in a groove ( 4 ) of a stator of the electric machine, an intended width (B) and an intended height (H) of a portion of the wire ( 5 ) in dependence on a predetermined cross section of the groove ( 4 ) and a given position of the situation ( 3 ) in the groove ( 4 ), the cross section of the section of the wire ( 5 ) is converted to a wire section ( 2 ) with the predetermined width (B) and the predetermined height (H), and the wire section (FIG. 2 ) in the given position ( 3 ) is arranged.
  17. Method according to claim 16, wherein a layer ( 3 ), in which several sections of the wire ( 5 ) and the intended widths (B) of the several sections of the wire ( 5 ) are predetermined such that the sum of the intended widths (B) of a width of the groove ( 4 ) corresponds to the predetermined position, and the cross-sections of the several sections of the wire ( 5 ) are converted to multiple wire sections ( 2 ) with the predetermined width (B), and the several wire sections ( 2 ) in the given position ( 3 ) to be ordered.
  18. Method according to one of Claims 12 to 17, in which the wire sections ( 2 ) are fixed at least in sections by means of a fixing agent.
  19. Method according to one of claims 12 to 18, wherein the forming by means of a forming device ( 6 ), which is a pair of rollers ( 7 ), or which is designed as a press.
  20. Method according to one of claims 12 to 19, wherein the wire sections ( 2 ) in a winding template ( 9 ) to be ordered.
  21. Method for producing an electrical machine, in particular an electric motor, comprising a method for producing a stator winding according to one of claims 12 to 20, further comprising arranging the bundle of the coil of the stator winding in a groove ( 4 ) of a stator of the electric machine.
  22. A method according to claim 21, wherein the arranging of the wire sections ( 2 ) by means of a needle winding method.
DE102014222376.8A 2014-11-03 2014-11-03 Stator winding for an electric machine, electric machine with the stator winding, and method for its production Pending DE102014222376A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3285367A3 (en) * 2016-08-04 2018-03-07 Otis Elevator Company Winding assembly for rotary electric machine and method of manufacturing

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Publication number Priority date Publication date Assignee Title
US20020043886A1 (en) 2000-10-16 2002-04-18 Mitsubishi Denki Kabushiki Kaisha Stator for an alternator and method of manufacturing the same
JP2003244906A (en) * 2001-12-13 2003-08-29 Asmo Co Ltd Manufacturing method for rotating electric machine and rotating electric machine
FR2846806A1 (en) 2002-09-16 2004-05-07 Valeo Equip Electr Moteur Method of fabrication of electrical conductors in the form of U-shaped pins, includes die stamping apparatus for this fabrication
EP2112747A1 (en) 2008-04-24 2009-10-28 Magneti Marelli Holding S.p.A. Electrical machine and method for manufacturing the same
US20110210558A1 (en) * 2010-02-26 2011-09-01 Henrik Stiesdal Stator for an energy converting apparatus and energy converting apparatus using the same
EP2648317A1 (en) 2011-04-28 2013-10-09 Aisin Aw Co., Ltd. Stator for rotating electric machine
WO2014045246A2 (en) * 2012-09-20 2014-03-27 Wilic S.Ar.L. Active assembly of a wind turbine rotating electric machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020043886A1 (en) 2000-10-16 2002-04-18 Mitsubishi Denki Kabushiki Kaisha Stator for an alternator and method of manufacturing the same
JP2003244906A (en) * 2001-12-13 2003-08-29 Asmo Co Ltd Manufacturing method for rotating electric machine and rotating electric machine
FR2846806A1 (en) 2002-09-16 2004-05-07 Valeo Equip Electr Moteur Method of fabrication of electrical conductors in the form of U-shaped pins, includes die stamping apparatus for this fabrication
EP2112747A1 (en) 2008-04-24 2009-10-28 Magneti Marelli Holding S.p.A. Electrical machine and method for manufacturing the same
US20110210558A1 (en) * 2010-02-26 2011-09-01 Henrik Stiesdal Stator for an energy converting apparatus and energy converting apparatus using the same
EP2648317A1 (en) 2011-04-28 2013-10-09 Aisin Aw Co., Ltd. Stator for rotating electric machine
WO2014045246A2 (en) * 2012-09-20 2014-03-27 Wilic S.Ar.L. Active assembly of a wind turbine rotating electric machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3285367A3 (en) * 2016-08-04 2018-03-07 Otis Elevator Company Winding assembly for rotary electric machine and method of manufacturing

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