EP3729615A1 - Dispositif de stator/rotor pour moteurs électriques et procédé de fabrication d'un revêtement d'un dispositif de stator/rotor - Google Patents

Dispositif de stator/rotor pour moteurs électriques et procédé de fabrication d'un revêtement d'un dispositif de stator/rotor

Info

Publication number
EP3729615A1
EP3729615A1 EP18845340.1A EP18845340A EP3729615A1 EP 3729615 A1 EP3729615 A1 EP 3729615A1 EP 18845340 A EP18845340 A EP 18845340A EP 3729615 A1 EP3729615 A1 EP 3729615A1
Authority
EP
European Patent Office
Prior art keywords
stator
plastic
flow channel
rotor
winding groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18845340.1A
Other languages
German (de)
English (en)
Inventor
Jürgen FRANK
Thomas Ehrler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pvs Kunststofftechnik & Co KG GmbH
Original Assignee
Pvs Kunststofftechnik & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pvs Kunststofftechnik & Co KG GmbH filed Critical Pvs Kunststofftechnik & Co KG GmbH
Publication of EP3729615A1 publication Critical patent/EP3729615A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors

Definitions

  • the present invention relates to a stator / rotor device for electric motors with at least one or more stacked stator / Rotorvers adopted / s, wherein the stator / Rotorvers adopted / s as rotation to a rotation axis
  • symmetrically formed component is / are each stacked with one another arranged individual sheets, the individual sheets have a rotationally symmetrical circumferential contour spaced in the circumferential direction in a predetermined pitch arranged protrusion devices that form in a stacked state inwardly or outwardly pole pieces that of an electrically conductive Wire are each wrapped and in each case between the pole shoes Wickelnute are each provided with a Nuteingang, at least the inner peripheral contour of each winding groove and the top and bottom of the pole pieces has an electrically insulating, in particular sprayed, plastic layer.
  • the invention further relates to a method for producing a plastic coating of such a stator / rotor device.
  • Stator / rotor devices with stator / rotor package devices or segments of electric motor components are in the prior art in a variant in Spritzg screenver drive molded with plastic.
  • confirmation copy It fills the main requirement to ensure the insulation of live components to metallic parts of the building or housing.
  • contours can be created with the injection molding in the form of outline, which support the subsequent manufacturing process of the engine and greatly simplify. By order injection process can therefore be saved later individual assembly steps.
  • FIGS. 30 to 32 Such a stator is shown in FIGS. 30 to 32.
  • the any known stator device comprises a package 10 (Statorpac Vintage) of stamped or lasered individual sheets 12 with a respective ent speaking contour, which are congruent stacked and then joined together.
  • the stator / rotor core device 10 is formed as a rotationally symmetrical to a rotational axis D formed component and consists, as mentioned, of stacked congru ent single sheets 12.
  • the individual sheets 12 have a rota tion symmetric peripheral contour with spaced in the circumferential direction U in egg nem predetermined pitch projections arranged on the stacked in the stacked state in the
  • Winding grooves 16 are present in each case between the pole shoes 14, wherein in the final state, inter alia, the inner peripheral contour of each winding groove 16 has an electrically insulating molded plastic layer 30 made of thermoplastic or thermosetting material (see FIG. 31).
  • the pole pieces 14 may also face outward.
  • These individual sheets 12 are manufactured in many cases from sheet thicknesses of 0.12 to 0.50 mm, in engine found in dependence on the engine size and engine type and thicker sheets use. To ensure the desired magnetic properties, stand For this purpose, sheets 12 made of special steel / iron alloys with specific electromagnetic properties are available. The rolled-up metal strips (coils) of corresponding thickness are guided, for example, through a punching tool, and individual sheets 12 are punched out with corresponding contours. Other manufacturing methods such as lasers or similar cutting methods are known.
  • Welding procedure be added to a stable body.
  • stator / rotor core assemblies 10 Before the stator / rotor core assemblies 10 can be covered with copper wire, an insulating layer between copper wire and the bare metal surface of the stator / rotor core assembly 10 is required (the wrapped copper wires are not shown in FIGS. 30-32).
  • the injection molding process is also particularly suitable for this purpose.
  • the plastic performs the function of insulating the package for winding or other current-carrying elements in the motor assembly.
  • the plastic layer acts as an insulating layer between the metal surface of the laminated core and the introduced copper winding of the conductors, which can be formed as profiles or wires, for example, copper or aluminum or other conductive metals.
  • the injected plastic fulfills the function as a construction material for functional or assembly elements on the overmoulded raw package. Both the insulation and the functional elements are molded in the plastic injection process in one operation. The proportion for subsequent assembly work is significantly reduced, since most insulating elements and many assembly-supporting elements are already molded in one operation.
  • An object of the plastic injection technique is that in particular groove areas of the package, the adjacent pole shoes are subsequently wound with copper as thin as possible to be ejected with plastic to achieve a maximum winding space for the copper wire. This means a maximum number of copper windings that can be accommodated in the winding grooves in order to increase the ef efficiency and the efficiency of the electric motor.
  • Another advantageous effect of the overmolded insulating layer is the better heat transfer (the energy dissipation) during the operation of the copper from the plastic to the package, since there is no air gap between the insulation and the package surface and, moreover, a thermally conductive plastic can be used.
  • stator / Rotorbein- directions or segments of said components are produced by injection molding and sprayed usually at one end face of the package.
  • This Anspritzposition usually results from the package contour and the wall thickness design of the plastic.
  • One principle in injection molding is to spray on positions with large wall thicknesses wherever possible. These are primarily to be found on the front sides of the stator.
  • the package which is also called raw package ge
  • the injection mold is closed.
  • the already melted in the injection molding machine plastic is injected through one or more runners in the mold cavity and fills the contouring cavities of the cavity, which correspond to the desired plastic design of the molded package.
  • the finished package is removed from the mold.
  • the molten plastic emits heat to the cold wall of the cavity during the injection process or during its movement in the cavity in the manner of a source flow. This has far-reaching disadvantages.
  • contour areas where the melt stands and no new melt or heat flows in the center of the wall cross-section solidifies the melt over the wall thickness even faster. This means that the melt increasingly loses its temperature on its way through the cavity, causing the viscosity of the melt to increase at the same time.
  • the known one-sided / front-side gating limits the mögli che sprayable package height substantially.
  • essentially the factors mentioned above have been used, which have been correspondingly matched to the respectively existing injection situation with respect to the geometry of the package.
  • electric motors with package heights of> 100 mm will become increasingly important in the future.
  • package heights of this magnitude can hardly be achieved while at the same time having minimal wall thickness in the area of the winding groove.
  • the limit to this is essentially the maximum flow path length of the plastic.
  • flow fronts are created at several positions of the parcel, which spread in different directions depending on the position.
  • a flow front refers to the foremost position of the propagating source of the plastic.
  • Tie lines and air pockets are generally to be seen as a weak point in injection molding technology. Microstructures and fiber orientations show a lower load capacity. In mechanical stress, weld lines often show as a predetermined breaking point, which can affect the function very strong or can lead to failure. When electrical load, for example in the context of high voltage or breakdown tests, there is a punctual failure of the insulating layer or the plastic wall because of the known plastic molded packages. In addition, the resulting weld lines and air inclusions also have a negative impact on the required material tightness. Inso far is the desire, in the context of the required thin-wall Wickelnut Schemeen such weld lines and air pockets from iso lationstechnischer view absolutely to avoid.
  • Air entrapment problem can be largely avoided, an extension of the flow paths and an economic
  • the stator / rotor device according to the invention is accordingly characterized in that, in the stacked state of the individual plates / stator / rotor packet devices, at least one continuous flow channel extending in the longitudinal direction of the stator / rotor device is present in the region of at least one winding groove, which is connected to the Plastic layer is in communication connection and via which the plastic for producing the plastic layer on the inner wall of the winding groove is injected / injected.
  • a structurally particularly simple and advantageous embodiment to implement is characterized in that a first flow channel is formed in conjunction with a mold core used in the winding groove during the injection molding process characterized in that each individual sheet on the inner contour of at least one winding groove has at least one to the inside of the winding groove open towards F strictlykanalausANSung.
  • a particularly preferred development which ensures qualitatively very good and economically implementable solutions, is characterized in that a second flow channel is formed in conjunction with a mold core inserted in the winding groove during the injection molding process, in that the groove entrance during the
  • Injection molding is designed as a closed Nuteingang.
  • a particularly advantageous solution which enables economical use and particularly high qualities even with large sizes of engines, is characterized in that a first and a second flow channel is present and via the first and / or second flow channel for producing the plastic layer on the Inner wall of the winding groove plastic can be injected.
  • Stator / rotor device is characterized in that the FGHzitzalausANSung each have a concave
  • the maximum depth of the flow channel recess is preferably one or more times the thickness of the plastic layer.
  • a particularly advantageous embodiment which only minimally influences the magnetic properties of the device, is characterized in that the flow channel recess or the flow channel to a magnetically non-relevant part of the inner contour the winding groove, for example, preferably in the groove bottom of the winding groove, is arranged so that the same flow path lengths can be realized.
  • stator / rotor invention or therapies V which of the possible package height to be encapsulated components in particular with respect to particularly advantageous, is characterized in that at least one stator / rotor package device further comprising at least one or more directly one above the other congruently stacked Single sheet / s has / each have in the region of the groove bottom of each winding groove from the inside to the outside or vice versa continuous Anspritzkanalausnaturalung, which arranged one above the other form a Anspritzkanal which opens into the flow channel and on the plastic for producing the plastic layer the inner wall of the winding groove can be injected.
  • a structurally particularly advantageous embodiment is characterized in that the AnspritzkanalausEnglishung in one or more, stacked single sheet / s is present.
  • the Anspritzkanalaus strictly speaking can in a preferred
  • Embodiment each have straight parallel flanks or in an alternative embodiment have conically widening outward or tapered flanks.
  • an advantageous embodiment is characterized in that the injection channel in the upper and / or lower end edge region and / or in the central region of the stator /
  • Rotor package device is present.
  • an advantageous embodiment is characterized in that the stator / rotor device several stacked on each other, especially the same or
  • stator / rotor packet means having stacked, stator / rotor packet means, wherein an alternative embodiment characterized in that in stacked stator / Rotorken respondentsen an upper Anspritzkanal a lower stator / rotor packet means is arranged congruent to a lower Anspritzkanal an adjacent upper stator / rotor packet means.
  • the packages to be inserted into the injection mold can also be produced by stacking individual sheets, depending on the geometry. This creates no Symmetriefeh ler in the construction of the package stack, since each sheet can flexibly adjust the receiving contour of the injection molding tool. High sheet stacks can thus be inserted into the tool without clamping. According to the cross section, the position and the number of Anspritzkanalebenen be made flexible depending on the layer combination of different individual sheets. The inventive combination of injection channel with flow channel optimal Umspritzunglinger can be achieved.
  • the flow path length of the melt from the injection point divides into two approximately equal distances, since the injection point or the injection points can be arranged centrally over the existing injection channels in the overall package.
  • the flow paths are distributed unevenly in de directions. In comparison to the one-sided front-side gating the flow paths are still significantly shortened ver.
  • the flow path lengths do not necessarily have to be the same length in both filling directions.
  • Wall thicknesses of the plastic encapsulation layer and at the same time allows large flow paths and thus large package heights.
  • Wall thickness of the plastic layer, in particular in magnetic unimportant contour regions of the groove, can be achieved both in the case of external application and in the case of internal injection
  • the rotor / stator package is in a magnetically unrelevant area with a flow channel, formed by the
  • the flow channel is formed by a trough-like depression in the laminated core in a simple manner. This creates a channel with an enlarged cross-section of the wall thickness. This channel runs along the filling direction of the plastic. During the injection process, this flow channel supports the filling of the cavity or significantly improves the filling behavior. The channel can be brought in one, several or all winding grooves. Thus, the flow channel promotes better fillability of the stator / rotor packet device through the cross-sectional enlargement running in the filling direction. Due to the thickened wall thickness area along the flow path in the flow channel, the pressure loss is reduced by reduced flow path length with a small wall thickness, since the plastic mass can escape along the flow channel into the corresponding wall. This results in the following advantages:
  • thermoplastic or thermosetting plastic consists of thermoplastic or thermosetting plastic.
  • Production of a plastic coating of a stator / rotor device according to claim 1, in which the stacked individual sheets form flow channels, is characterized in that after introduction of stacked individual sheets or Single sheet packages in the injection mold of the plastic is injected through the flow channels.
  • a second variant of the method according to the invention for the preparation of a plastic coating of a stator / rotor V orcardi according to claim 9 with Anspritzkanälen and flow channels, is characterized in that after introduction of the individual plates or
  • FIG. 1 is a schematic perspective view of a stator /
  • Rotor package device with inwardly directed pole shoes and inwardly open
  • FIG. 1 shows a schematic perspective detail of a section of the packet according to FIG. 1 with two pole shoes and a winding groove with flow channel
  • FIG. 2 shows a schematic perspective detail of a section of the packet according to FIG. 1 with two pole shoes and a winding groove with flow channel
  • FIG. 3 is a schematic plan view of a stator / Rotorvers- device with outwardly directed Pol micn and outwardly open Wickelnutaus strictly adopted each having a flow channel in the groove bottom of the winding groove, wherein additionally each upper side a Anspritzkanal is present, with the respective flow channel in communication connection stands,
  • FIG. 4 shows a schematic perspective view of the stator / rotor packet device according to FIG. 3, FIG.
  • FIG. 5 is a schematic plan view of a detail of the stator /
  • FIG. 6 is a schematic perspective view of the detail of FIG. 5,
  • Fig. 7 is a schematic perspective view in side view of
  • FIG. 8 shows a schematic plan view of a detail of the stator / rotor packet device according to FIG. 3 with the formation of a flow channel in the groove base of the winding groove,
  • FIG. 9 is a schematic perspective view of the detail of FIG. 8,
  • 10 is a schematic detail plan view of an embodiment of a stator / rotor device with Anspritzkanal - recess and molded plastic layer
  • 11 is a schematic detail plan view of an embodiment of a stator / rotor device with formation of a flow channel with molded plastic layer
  • FIG. 12 schematic detail perspective of a stator / rotor pact in FIG.
  • FIG. 14 is a schematic plan view of the stator / Rotorvers- device of FIG. 3 with illustrated runner nozzle device, wherein for example in a groove a mold core is arranged,
  • Fig. 15 is a schematic plan view of FIG. 14 at a distance
  • 16 is a perspective view of two stacked stator /
  • Rotor package devices with a plastic injection device with nozzles, which are acted upon via a Anspritzkanal with subsequent flow channel, in the cut state,
  • FIG. 18 shows a perspective view of the stator / rotor packet devices according to FIG. 17 with the upper stator / rotor packet device removed
  • FIG. 19 is another perspective view of the stator / Rotorvers- device of FIG. 17 in a side view
  • stator / rotor packet devices with injection channel and flow channel
  • 21 a schematic perspective view of four stacked stator / rotor packet devices with injection channel and flow channel
  • FIG. 22 is a schematic perspective view of two stacked stator / rotor packet assemblies, each package having on its underside an outboard runner for each groove communicating with a flow channel.
  • FIG. 23 shows a schematic view of the stator / rotor packet device according to FIG. 22 in the region of the injection channel, FIG.
  • FIG. 24 is a schematic perspective view of two stacked stator / Rotord facilities, the lower package is rotated by 180 °, so that an enlarged outside Anspritzkanal is present,
  • FIG. 25 shows a schematic view of the stator / rotor packet device according to FIG. 24 in the region of the injection channel, FIG.
  • FIG. 26 schematic perspective view of the stator / rotor package device according to FIG. 22 with molded plastic layers or further plastic layer elements and representation of the injection points on the respective Anspritzkanal in dash-dotted lines
  • FIG. 27 is a schematic perspective view of the stator /
  • Rotor package device according to FIG. 24 with molded plastic layers or further
  • FIG. 28 is a schematic detail perspective of the positioning of the
  • Fig. 29 is a schematic plan view of the stator / rotor package
  • FIG. 30 is a schematic perspective view of a stator / rotor packet device consisting of stacked individual plates with inwardly facing pole shoes and grooves according to the prior art
  • stator 31 is a schematic detailed plan view of the stator /
  • FIG. 32 is a schematic detail perspective view of the plastic overmolding at the upper injection point on the upper side with a schematic representation of the flow process, FIG.
  • Fig. 33 is a schematic detail plan view of a winding groove with the
  • Example introduced copper wire or similar electrical conductors, 34 is a schematic perspective view of a stator /
  • FIG. 35 shows a schematic representation of the stator / rotor packet device according to FIG. 34 with a schematic representation of the all-round freely selectable sprue position for the groove inputs designed as a flow channel,
  • FIG. 36 is a schematic perspective view of the stator / rotor packet device according to FIG. 34 with the representation of possible gate positions,
  • FIG. 37 is a schematic perspective view of the stator / rotor package device according to FIG. 35 with representation of possible gate positions, FIG.
  • Fig. 38 is a schematic perspective view of the flow paths of
  • Fig. 39 is a schematic perspective view of the flow paths of
  • Fig. 40 is a schematic detail top view of a winding groove with
  • the individual sheets 41 is a schematic perspective view of a stator / rotor device with four stacked stator / rotor core assemblies with injection and flow channels showing the flow direction of the melt front in cascade-shaped injection molding starting at the upper Anspritzkanal and
  • FIG. 42 shows a schematic perspective illustration of a stator / rotor device with four stacked stator / rotor packet devices with injection and flow channels, showing the flow direction of the melt front in cascade-shaped injection molding starting at the middle injection channel.
  • FIGS. 30, 31 and 32 show a stator / rotor packet device 10, as known from the prior art and already described in the introduction to the description.
  • the stator / rotor package device 10 is encapsulated with electrically insulating plastic.
  • 16 mold cores are introduced into each groove, which are formed so that after the plastic injection process, the inner walls of the winding grooves 30 are surrounded by a thin electrically insulating plastic layer 30 (see Fig. 31).
  • Fig. 32 is highly schematic in a detail perspective, the flow behavior of
  • Plastic partially shown. Usually, a one-sided, front-side gating over the injection point A from above. The flow behavior of the plastic is shown in Fig. 32 with arrow F and dashed lines. It results in a relatively long
  • Rotor package device 10 limits are set. After the stator / Rotor package device 10 has been encapsulated with plastic, the pole pieces 14 are equipped with an electrical conductor (for example wire, strap or profile element), wherein the wrapped conductor in Figures 30, 31 and 32 are not provided.
  • an electrical conductor for example wire, strap or profile element
  • FIGS. 1 and 2 show a first exemplary embodiment of a stator / rotor packet device 10.1, which essentially corresponds in geometry to the geometry of the stator / rotor packet device 10 according to FIG. 30.
  • an essential difference consists in the fact that in the groove base of each winding groove 16 there is a flow channel recess 22 open in the groove inside, wherein the flow channel recess 22 of each individual sheet 12 is arranged congruently one above the other in the longitudinal direction L, so that
  • the stator / rotor package device 10.1 thus becomes in a magnetically unrelevant region, namely the groove bottom of the winding groove 16, with a
  • Flow channel 26 provided, which is formed by a trough-like depression (flow channel recess 22) in each single sheet 12 of the laminated core. This creates a flow channel 26 with an enlarged cross-section of the wall thickness. This flow channel 26 extends along the filling direction of the plastic. During the injection process, this flow channel 26 supports the filling of the capacity or improves the filling behavior.
  • a flow channel 26 is present in each winding groove 16.
  • the flow channel 26 promotes better fillability of the stator by the running in the filling direction cross-sectional enlargement. Due to the thickened wall thickness region along the flow path, the pressure loss is lower and it is possible to achieve reduced flow path lengths with a smaller wall thickness of the plastic layer.
  • FIGS. 8 and 9 the flow channel 26 formed by the flow channel recess 22 of the individual sheets is shown in detail.
  • FIG. 11 shows in detail in a plan view an inner surface of a winding groove 16 with flow channel 26 provided with a thin, insulating plastic layer 30.
  • FIGS. 28 and 29 the area of a winding groove 16 is shown in highly schematic form in a detailed perspective
  • the winding groove 16 is already encapsulated with a plastic layer 30 and further molded plastic portions 31 are shown schematically.
  • FIGS. 3 and 4 show a second exemplary embodiment of a stator / rotor core device 10. 2, which differs from the stator / rotor core device 10. 1 according to FIGS. 1 and 2 in that the pole shoes 14 face outward and those between the pole shoes 14 existing winding grooves 16 are open to the outside. Also in this embodiment, in the groove bottom of each winding groove 16 extending in the longitudinal direction L outwardly open flow channel 26 is present, the congruent one above the other
  • the stator / rotor core device 10.2 differs from the stator / rotor core device 10.1 according to FIGS. 1 and 2 further in that in the upper end region of the stator / rotor core
  • At least one or more individual sheets 12 have an injection channel recess 24 extending from the inside to the outside, which are arranged congruently one above the other, so that an injection channel 28 extending in the radial direction R is formed
  • Embodiment of Fig. 3 and 4 respectively opens into the flow channel 26.
  • the injection channel 28 as a single feature is shown schematically in detail in the region of a winding groove 16 in Figures 5 and 6.
  • the height of the Anspritzkanals 28 in the longitudinal direction L is determined by the number of Anspritzkanalausappelisme 24 of the individual sheets 12.
  • Anspritzkanalausnaturaleptept 24 of 7 in the end region stacked individual sheets is formed.
  • the channel cross section is thus determined by the number of sheets and the width of
  • Anspritzkanalausnaturalung 24 determined in the circumferential direction.
  • a winding groove 16 with a thin, electrically insulating plastic layer 30 molded onto the inner surface of the winding groove in the region of the injection channel 28 is shown schematically in a detailed plan view.
  • Figures 12 and 13 show in a detail perspective the
  • Fig. 14 is a schematic plan view of the state before the injection of the plastic in a stator / rotor package device 10.2 is shown. From the inside are at each Anspritzkanal 28th
  • Injectors 32 are connected, which open into a central injection channel in a star shape.
  • an inserted mold core 40 is exemplified, which ensures the inner coating of the inner surface of the groove 16.
  • the plastic material is pressed through the injector into the cavity and distributed both in lateral
  • each winding groove 16 is molded on the flow channel 26, for example via a tunnel gate.
  • the melt is passed over the Anspritzkanal 28 to the winding groove 16 and distributed in the winding area evenly in all directions.
  • stator of two stacked stator / Rotorwoven device 10.2 or 10.1 is composed see, for example, Figures 17, 18, 19, 22, 24, 26 and 27.
  • Stator / rotor packet devices for example 3 (see Fig. 23) or for example 4 (see Fig. 21) may be present.
  • the entire stator / rotor consists of two
  • stator / rotor packet assemblies 10.2 together.
  • injection channels 28 are present in the groove bottom of the grooves 16, so that each winding groove 16 is given a channel-shaped recess, which opens into the flow channel 26 respectively.
  • a closed injection channel 28 is created at the abutting surface, which in each case forms the
  • the entire package can be injected at approximately half the height of the injection channels 28.
  • the flow path divides into two
  • Anspritzkanals 28 results.
  • two stator / rotor packet devices 10.1 are stacked in opposite directions to one another, so that an injection channel 28 with twice the height H2 results.
  • FIGS. 26 and 27 which corresponds to the representation of FIGS. 22 and 24, the injection points on the injection channels 28 are indicated by dashed and dotted lines. Furthermore, FIGS. 26 and 27 show the stator / rotor package device 10.2, as it is encapsulated with plastic after the encapsulation process. In addition to the encapsulation of the inner surface of the winding groove 16 with a thin plastic layer 30 are still more plastic parts 31st
  • Fig. 33 the known method is shown schematically to introduce the electrical conductor 50 in the winding groove 16, wherein the electrical conductor in the illustrated embodiment as
  • Copper wire is formed, with which the pole piece is wrapped.
  • the pre-insulated stator / rotor packet device is wound over the slot opening with an endless wire / profile.
  • the pole piece 14 is doing with a certain predetermined number
  • flyer, needle or coil winding technology or the collection process also require open Nutein réelle 17th
  • stator / rotor package Other methods are also known, stator / rotor package
  • the groove 17 can be used according to the invention as a flow channel 26.2 and sprayed with plastic to ensure optimum flow, since the Nuteingang 17 with inserted mold core 20 in the groove 16 with the to be injected insulating layer 30 of the winding groove 16 in
  • the groove inlet 17 is used to use a flow channel 26.2 for injecting the plastic, since it is possible to introduce electrical conductors into the winding groove 16 without the presence of an open slot opening.
  • a hairpin method for introducing electrical conductors for example, individual rod-shaped
  • closed groove inputs 17 as flow channel 26. 2 is shown schematically in FIG. 34.
  • plastic Nuteingang 17 26.2 larger flow path lengths are achieved by the wall thickness or cross-sectional widening created by forming a flow channel and higher packages can be encapsulated for example by injection molding.
  • the gate position for the respective flow channels 26.2 can be freely selected over a circumferentially continuous collar injection area 34 all around when the flow channel 26.2 is connected without cross-sectional constriction to the adjacent design of the gate position.
  • This is exemplified in Fig. 35 by the dot-dashed arrow P indicating the variable gate position.
  • the individual inside webs the pole pieces 14 may be formed, for example, as a continuous wall 36.
  • FIGS. 36 and 37 in conjunction with FIGS. 38 and 39 show an example of possible sprue positions of the flow channel 26. 2 formed by the groove inlet 17. Via a central Anspritz position Z of the plastic is supplied and guided via star-shaped injection nozzles 32 to the second flow channels.
  • Winding groove 16, as shown for example in Fig. 38, is an essential inventive concept.
  • the flow paths F1 of the molded plastic are illustrated in a highly schematized manner via the second flow channel 26.2 formed by the groove inlet 17 between the outer wall of the mold core 40 and the inner wall of the winding groove 16.
  • Fig. 38 shows the situation that at the same time a first flow channel 26.1 is present, the corresponding in the groove bottom of the
  • Wickelnut 16 existing congruent flow channel recesses 22 arranged individual individual sheets is formed, for example, in Fig. 2 or 11.
  • the flow channel can also be formed by stacked laminated cores.
  • Fig. 39 shows the same arrangement without the formation of the first flow channel 26.1.
  • FIG. 40 shows a detail of a groove 16 with adjoining pole shoes 14 with the first flow channel 26. 1, the second flow channel 26. 2 and the insulation layer 30, wherein the electrical conductor 70 is / are not formed by a copper wire winding but by a profile element, which is inserted into the groove 16 and one of the inner peripheral contour of the groove 16 has adapted outer peripheral contour with reduced dimensions.
  • stator / rotor package devices 10.1 10.2 can be sprayed along the stacking height at one or more to 28 injection channels.
  • a stator / rotor device formed from a total of three or four stator / rotor packet devices 10. 2 stacked on top of one another has already been described above with reference to FIG.
  • stator / rotor pack device 10.1, 10.2 can be used to encapsulate the winding grooves 16 in cascade with the injection channels 28 in connection with the flow channels 26.1, 26.2 with a plastic layer 30 or to fill.
  • An exemplary embodiment of the cascade-shaped injection-molding is shown by way of example on the stator / rotor device according to FIG. 41 in a first exemplary embodiment.
  • the stator / rotor device corresponds to the already described with reference to FIG. 21 stator / rotor device with a total of four stacked stator / Rotorbeinrichtun conditions 10.2.
  • the stator / rotor packet devices 10.2 each have an injection channel 28 on the inside in the groove base of the winding groove 16, which is designated in FIG. 41 from top to bottom by reference numerals 28A, 28B, 28C and 28D.
  • the injection ports 28 each open into a first flow channel 26.1, which is continuously present in the longitudinal direction.
  • the injection process is started, for example, at the upper injection channel 28A.
  • the injection process on Anspritzkanal 28B is also started or switched on sezuedminister.
  • the flow front of the plastic is further driven from here and flows over the further course of the Anspritzkanal 28 C, then the second offset also plastic is molded.
  • the same procedure takes place in the Anspritzkanal 28D. Due to the time-delayed opening of Anspritzkanäle 28 A, 28 B, 28 C, 28 D depending on the progress of the melt front Bindenaht Struktur is largely avoided.
  • the flow direction that is, the propagation direction of the source flow direction of the melt front, shown schematically with the arrowheads Fl.
  • the process can be started at any desired injection channel 28 and the respectively adjacent injection channels 28 can be connected at the respective time of the overflow. This is illustrated by way of example in a second exemplary embodiment according to FIG. 42.
  • the injection process is started on the central injection channel 28C. In this case, flow fronts are created in both directions, namely downwards (direction Fl) and upwards (direction F2).
  • direction Fl downwards
  • F2 upwards
  • the aforementioned injection channels 28B and 28D are switched thereto, that is to say the injection process is started at the respective injection channel 28B, 28D and the melt stream is continued.
  • the cascade-type injection-molding method can be carried out, for example, on one or more winding grooves by correspondingly time-delayed injection of plastic channels over the injection channels 28. Furthermore, the cascade-shaped injection molding process can be carried out on both inner and outer grooves of stator / rotor package devices. A conversion to single sheet stacking is easily possible. Furthermore, combined stacks of different sheet metal can be easily converted. In conjunction with the Anspritzkanälen invention or flow channels, virtually any geometric design of stator / rotor packet devices can be encapsulated with an insulating plastic layer while largely avoiding weld seam formations in the region of the winding grooves.
  • the present invention is not limited to the illustrated embodiments.
  • the number of pole shoes or winding grooves can vary.
  • An essential advantageous feature consists in that there is a flow passage recess which is open in the interior of the winding groove on one, on several or all winding grooves, which together with the mold core present in the winding groove during the injection molding process has a cavity with the first flow channel forms or the Nuteingang is closed during the plastic injection and thereby forms in connection with the mold core, the first flow channel.
  • a second flow channel may be present, which is formed by the internally closed Nuteingang. Particularly advantageous is the combination of first and second flow channel.
  • the stacked individual sheets have defined AnspritzkanalausEnglishept so that at least one Anspritzkanal can be formed, which opens into the / the flow channel / flow channels, whereby the flow paths can be shortened and packages with high altitude can be easily umgespritzt without that the quality suffers.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un dispositif de stator/rotor pour moteurs électriques, comprenant au moins un ou plusieurs ensembles blocs de stator/rotor (10.1), le ou les ensembles blocs de stator/rotor (10.1) se présentant sous la forme d'un composant conçu de manière symétrique en rotation par rapport à un axe de rotation (D) comportant des plaques individuelles empilées les unes sur les autres, ces plaques individuelles (12) présentant un contour périphérique à symétrie de rotation avec des éléments en saillie disposés à distances les uns des autres dans la direction périphérique (U) dans une dimension modulaire prédéfinie, lesquels éléments, à l'état empilé, forment des pièces polaires (14) tournées vers l'intérieur ou l'extérieur, ces pièces étant chacune entourées par un fil électroconducteur, des rainures d'enroulement (16) comportant chacune une entrée de rainure (17) étant prévues entre lesdites pièces polaires (14), au moins le contour périphérique intérieur de chaque rainure d'enroulement (16) et la face supérieure et inférieure de la pièce polaire (14) présentant une couche de plastique électro-isolante, notamment extrudée. L'invention se caractérise en ce que, lorsque les plaques individuelles (12) ou les ensembles blocs de stator/rotor sont à l'état empilé, au moins un canal d'écoulement (26.1) traversant s'étendant dans la direction longitudinale (L) du dispositif de stator/rotor est prévu au voisinage d'au moins une rainure d'enroulement (16), ce canal étant en communication avec la couche de plastique, le plastique pouvant être ou étant injecté par l'intermédiaire dudit canal en vue de la formation de la couche de plastique sur la paroi intérieure de la rainure d'enroulement (16).
EP18845340.1A 2017-12-20 2018-12-19 Dispositif de stator/rotor pour moteurs électriques et procédé de fabrication d'un revêtement d'un dispositif de stator/rotor Withdrawn EP3729615A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202017006523.1U DE202017006523U1 (de) 2017-12-20 2017-12-20 Stator-/ Rotorvorrichtung für Elektromotoren
PCT/DE2018/000375 WO2019120354A1 (fr) 2017-12-20 2018-12-19 Dispositif de stator/rotor pour moteurs électriques et procédé de fabrication d'un revêtement d'un dispositif de stator/rotor

Publications (1)

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EP3729615A1 true EP3729615A1 (fr) 2020-10-28

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EP18845340.1A Withdrawn EP3729615A1 (fr) 2017-12-20 2018-12-19 Dispositif de stator/rotor pour moteurs électriques et procédé de fabrication d'un revêtement d'un dispositif de stator/rotor

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EP (1) EP3729615A1 (fr)
DE (2) DE202017006523U1 (fr)
WO (1) WO2019120354A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102018108329A1 (de) * 2018-04-09 2019-10-10 Schaeffler Technologies AG & Co. KG Stator mit einem Statorträger zur Integration in einer E-Maschine
CN109104003A (zh) * 2018-09-18 2018-12-28 珠海格力节能环保制冷技术研究中心有限公司 一种定子铁芯、绝缘骨架、定子以及绝缘骨架的注塑方法
DE202018004918U1 (de) 2018-10-23 2019-01-08 PVS-Kunststofftechnik GmbH & Co. KG Stator-/Rotorvorrichtung für Elektromotoren
DE102019205101A1 (de) * 2019-04-10 2020-10-15 Audi Ag Verfahren zum Herstellen eines elektromechanischen Bauteils

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US4015154A (en) * 1974-12-23 1977-03-29 Sony Corporation Motor and method for making same
JPS62141944A (ja) * 1985-12-16 1987-06-25 Toshiba Corp 固定子鉄心
DE10203796A1 (de) * 2002-01-31 2003-08-14 Bosch Gmbh Robert Stator für eine elektrische Maschine
JP2003324913A (ja) * 2002-05-08 2003-11-14 Aisin Aw Co Ltd 絶縁部材を備えたコアの製造方法及びそれにより製造されたコア
GB2420231B (en) * 2003-09-12 2006-08-02 Bosch Gmbh Robert Armature core for an electric motor

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WO2019120354A1 (fr) 2019-06-27
DE112018006510A5 (de) 2020-11-05

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