EP4038724A1 - Élément de bobine pour machine électrique - Google Patents

Élément de bobine pour machine électrique

Info

Publication number
EP4038724A1
EP4038724A1 EP20780684.5A EP20780684A EP4038724A1 EP 4038724 A1 EP4038724 A1 EP 4038724A1 EP 20780684 A EP20780684 A EP 20780684A EP 4038724 A1 EP4038724 A1 EP 4038724A1
Authority
EP
European Patent Office
Prior art keywords
coil
winding
elements
conductor elements
turning
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.)
Pending
Application number
EP20780684.5A
Other languages
German (de)
English (en)
Inventor
Stefan Reuter
Ralf Wittstadt
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP4038724A1 publication Critical patent/EP4038724A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • 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
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H02K15/0435—Wound windings
    • H02K15/0478—Wave windings, undulated windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to a coil element for an electrical machine with a distributed winding and an electrical machine with a corresponding winding.
  • the object of the present invention is to provide a coil element which keeps the required installation space as small as possible, in particular in the axial direction.
  • Another task is a winding scheme which is easy and quick to produce and enables the electrical machine to be operated with high performance and low losses.
  • a coil element for a coil of an electrical machine comprising at least two parallel conductor elements for arrangement in grooves of a coil body and at least one connecting section which connects the conductor elements to one another, wherein the conductor elements and the connecting section are formed in one piece, characterized in that only at a transition from a conductor element to the connecting section, a bending point is provided in a plane spanned by the two conductor elements, and that the connecting section runs in a straight line.
  • coil strands are used, which are formed from one or more Spulenelemen th from a piece of an electrically conductive material, for example copper wire, in particular with a rectangular cross section.
  • Coil elements as so-called hairpins, which in their initial form consist of two parallel conductor elements and a turning area connecting the conductor elements exist.
  • wave-shaped coil elements are also possible, please include a plurality of parallel conductor elements, two conductor elements being connected to one another via a turning area.
  • the terms hairpin, wavy conductor or waveguide also include coil elements in the sense of the application.
  • the conductor elements are placed in layers in the circumferential, axially extending grooves of a bobbin to form the winding.
  • the turning area in each case comprises a transition adjoining the conductor elements, in which the conductive material is bent in the direction of the respective other conductor element by a bending point.
  • the transitions are connected in one piece by a connecting portion that is viewed in a straight line in the radial direction. Due to the straight course, the required axial installation space for the coil head can be reduced and thus a compact design can be achieved.
  • Embodiments of a coil element are characterized in that the bending point is divided in the transition into two partial bending points connected by a straight intermediate section.
  • the bending point is divided into several partial bending points.
  • the partial bending points are advantageously connected by straight intermediate sections in order to space the areas of the insulating coating that are stressed by the bending.
  • Coil elements according to embodiments are characterized in that the connecting section has two further bending points in a plane which runs perpendicular to the plane spanned by the conductor elements, and that the further bending points are bent in opposite directions.
  • the conductor elements are arranged in different positions in the case of hairpins or alternately in different positions of the grooves in the case of waveguides. So that the turning areas, viewed in the axial direction, can be guided past one another over the circumference of the coil head, there is an S-shaped profile in the connecting section two opposing bending points provided. Due to the S-shaped profile, the connection areas can be arranged better next to one another in the radial direction, which saves space in the axial construction.
  • the two further bending points divide the connecting section into several areas and two of the areas run parallel.
  • the further bending points can be provided with a relatively large radius and merge directly into one another.
  • the further bending points share the connec tion section, however, in two rectilinear areas, viewed in the axial direction, which run parallel to one another.
  • a further straight loading area can be provided between the further bending points.
  • Coil elements according to embodiments are characterized in that the connection section or at least a region of the connection section delimited by bending points extends in a curved manner in a plane running perpendicular to the conductor elements.
  • the connecting section or areas of the connecting section it is also possible for the connecting section or areas of the connecting section to extend in a curved manner in a plane perpendicular to the conductor elements, that is to say in a radial plane. With this, too, the order of the turning areas can be improved in the radial direction and thus axial construction space can be saved.
  • Embodiments of coil elements are characterized in that the connecting section lies in a plane running perpendicular to the conductor elements.
  • the connecting portion is arranged parallel to the axial end of the Spulenkör pers, the required construction space can also be kept ge ring in the axial direction.
  • the wave winding can consist of several coil strands, which in turn are composed of several coil elements, such as hairpins, which are connected to one another in an electrically conductive manner, or each comprise one or more waveguides.
  • Embodiments of a wave winding are characterized in that at least two different coil elements are provided, which protrude with their connecting sections in the axial direction to different lengths over the coil body, and that at least the coil elements protruding further over the coil body are at least partially designed as coil elements according to the description .
  • coil elements according to the invention can reduce the required axial installation space.
  • the invention thus comprises a wave winding, which is a distributed winding in which the coils of the winding each over the circumference of the electrical Machine are distributed.
  • the electrical machine has at least one phase, in which several phases, in particular three phases, can also be provided.
  • a fixed number of magnetic poles is provided, which are distributed over an order of the electrical machine, this number corresponds to the number of poles and is an even number, since there is an equal number of magnetic north and south poles.
  • Either the rotor, the stator or the rotor and stator of the electrical machine have grooves for receiving the shaft winding.
  • Several coil strands connected in parallel can also be provided for each phase.
  • the electrical machine preferably has a number of holes of at least three, which means that a number of slots corresponding to the number of holes in the circumferential direction is provided for each pole.
  • the coil strands each have a connection pin at their two ends and are each divided into several sub-strands connected in series.
  • Each partial strand has a plurality of conductor elements corresponding to the number of poles of the electrical machine and thus extends once around the circumference.
  • Two adjacent conductor elements are each connected to one another by a turning area to form a hairpin.
  • the conductor elements are received in layers in the grooves and in each case two layers which are adjacent in the radial direction form a double layer, the conductor elements of a partial strand preferably being arranged in a double layer.
  • Each hairpin has contact areas at its free ends.
  • the turning area is preferably designed in one piece with the conductor elements.
  • the contact area is designed as a contact pin, which is connected to a corresponding contact pin of an adjacent hairpins of the coil strand for an electrically conductive connection, for example welding.
  • the contact area can also be designed as a connection pin, which is designed to connect the coil strand, more precisely the two ends of a coil strand, to power electronics for controlling the electrical machine.
  • contact pins and connection pins have the same geometric design, which reduces the number of different parts, which reduces costs and assembly effort, with different geometries also being possible, for example to facilitate the connection to the power electronics.
  • Wave windings according to the invention have two different variants of hairpins.
  • the turning area between the conductor elements has a shortened winding pitch WK.
  • the shortened winding step WK is one smaller than a theoretical standard winding step WS, which represents the distance between the grooves of the conductor elements to the theoretical value from the product of the number of holes and the number of phases, with the same per pole Groove position, for example right, middle or left with a number of holes of three, is occupied.
  • a change between the grooves is achieved through the shortened winding step WK.
  • the first variant of hairpins changes the conductor elements of a partial strand between adjacent grooves of the successive ones connected via the turning area of the hairpin , Pole. There is thus a change from a right to a middle or from a middle to a left groove, depending on the viewing direction and a number of holes of three.
  • Hairpins are therefore also provided in a second variant, the hairpins of the second variant having an extended winding step WL which is greater than the shortened winding step WK by the value of the number of holes q.
  • Both variants have in common that the contact areas are each shaped by half the standard winding pitch WS in the turning area in the opposite direction in order to achieve the standard winding pitch WS between interconnected conductor elements of adjacent hairpins.
  • wave windings according to the invention have a uniform winding step on the axial side of the contact areas for all layers, whereby the production as well as the connection binding, for example by welding, the corresponding contact areas with each other is simplified.
  • the deformation takes place per layer alternately in the opposite circumferential direction, since the conductor elements of each hairpin are arranged in different layers of a double layer.
  • a wave winding is characterized in that the coil element has several turning areas W, both turning areas W with a shortened winding pitch WK and with a lengthened winding pitch WL are provided. If waveguides are used, the coil elements have a plurality of turning areas W at both axial ends of the coil former. In order to achieve a desired winding pattern, turning areas W with at least partially different winding steps are therefore provided on a waveguide as Spu lenelement.
  • FIG. 1 For example analogous to the previously described embodiments with hairpins, turning areas with a standard winding step WS alternating with other winding steps are advantageously provided, so that these are on an axial side of the bobbin.
  • Embodiments of a wave winding are characterized in that the turning area W of the hairpins with an extended winding pitch WL continues axially over an NEN bobbin protrudes as the turning area W of the hairpins with a shortened winding pitch WK.
  • the turning areas of the hairpins connect the conductor elements in the grooves of the bobbin at one axial end of the bobbin.
  • the turning areas of the hairpins with a shortened winding step can be arranged next to one another and lead out with the same, preferably low, height.
  • the turning areas of the hairpins with an extended winding step protrude axially beyond the bobbin and span the turning areas with a shortened winding step.
  • Wave windings according to embodiments are characterized in that at least one hairpin with an extended winding pitch WL and at least two hairpins with a shortened winding pitch WK are provided per partial strand.
  • each partial strand has, on average, a distance between the conductor elements which corresponds to the standard winding pitch.
  • a number of hairpins with a shortened winding step corresponding to the number of holes minus one is provided for each hairpin with an extended winding step.
  • Embodiments of a wave winding are characterized in that at least one hairpin of a third variant is additionally provided per partial strand, which has a turning area W with a standard winding pitch WS. In this way, depending on the design, longer partial strands can also be provided, in which the average winding pitch corresponds to the standard winding pitch.
  • Embodiments of a wave winding are characterized in that the conductor elements per partial strand run through each of the slots associated with the number of holes with the same number of times. As a result, a high degree of symmetry is achieved for the coil strands, which is advantageous, among other things, with regard to reduced losses.
  • flair pins of a third variant are provided, these are provided with a number corresponding to the number of holes, or a multiple thereof, and are preferably arranged between the hairpins of the first and second variant.
  • Wave windings according to embodiments are characterized in that an integral multiple of parallel-connected coil strands are provided. Coils advantageously have several parallel strands. The same number of parallel strings are preferably provided for each phase, which is why an integral multiple of the number of phases is provided on parallel strings.
  • Embodiments of a wave winding are characterized in that the connection pins of the parallel coil strands are each arranged in the same pole. Due to the arrangement in the same pole, the outlay for interconnecting the coil strands can be simplified and made smaller. Thus, construction space can be saved.
  • Wave windings according to embodiments are characterized in that the two connection pins of a coil strand are arranged in the same position. Space can also be saved if both connection pins of a coil strand are arranged in the same, preferably outer, layer, since the interconnection makes them smaller or can only be arranged from one side or the connection pins can easily be reshaped in the radial direction .
  • Alternative embodiments of wave windings are characterized in that the two connection pins of a coil strand are arranged in directly adjacent layers of a double layer. Apart from the deformability in the radial direction, these embodiments have the same advantages as the aforementioned with an arrangement in one layer. Further alternative embodiments of a wave winding are characterized in that in each case one of the two connection pins of a coil strand is arranged in the radial inner layer and in the radially outer layer. Such an arrangement also provides easy access to the connection pins and it may be sufficient for the coil strands to pass through the coil body only once in the radial direction.
  • Embodiments of wave windings are characterized in that a part of each coil strand, which comprises at least one partial strand, is wound in the circumferential direction in the opposite direction, that the change in direction of the winding between the partial strands takes place in an outer position in the radial direction, that the connection is gebil det between the parts of the coil strand with different Licher direction of the winding by a bridge element or a deformed in the radial Rich direction and opposite circumferential direction contact area K, which are electrically connected to the contact areas K of the hairpins.
  • bridge elements By using bridge elements, the uniform deformation of the contact areas of the hairpins can be maintained, which simplifies production and at the same time an electrically conductive connection between the corresponding sub-strands can be achieved.
  • the bridge element can be used to easily create a connection over a required circumferential area. Another advantage is that, depending on the installation space available for the electrical machine, the bridge element is arranged either with an axial or particularly preferably with a radial orientation.
  • one of the corresponding contact areas can also be deformed radially outward and in the opposite circumferential direction in order to achieve a direct connection between the contact areas. This makes the forming process of the contact areas somewhat more complex, but the bridge elements and their positioning are omitted.
  • stator or a rotor for an electrical cal machine which is characterized in that the stator is provided with a wave winding according to the preceding description and an electrical cal machine in which a wave winding according to the above description is provided .
  • Fig. 1 a & 1 b each show a part of a coil element seen in the radial direction.
  • Fig. 3 shows a comparison of different turning areas side by side.
  • Fig. 4 shows a coil with a wave winding in a perspective view.
  • Fig. 5 shows an example of a winding scheme for a coil strand.
  • FIGS. 1 a and 1 b each show an exemplary embodiment of a coil element (6), only one turning area W with adjoining conductor elements (10) being shown is. If the coil element (6) is designed as a hairpin, contact areas K (not shown) are connected to the Lei terimplantation (10), if the coil element (6) is designed as a waveguide, a further turning area W or a correspondingly close to the conductor elements (10) Connection pin (5).
  • FIG. 1 a Both in Fig. 1 a and in Fig. 1 b, two parallel autismele elements (10) are shown, which are connected via a turning area W.
  • the turning area W each comprises a transition (9) adjoining the conductor elements (10) and a connecting section (8) arranged between the transitions (9).
  • a bending point (11; 11 ‘) is provided in the transition (9).
  • the connecting section (8) runs in a straight line in the plane shown, which is also spanned by the parallel conductor elements (10).
  • the transitions (9) each have two partial bending points (11 ‘), which together form the bending point (11), and a straight section in between.
  • transition (9) is formed by a continuously extending Bie frames (11).
  • FIGS. 2a and 2b each show an exemplary embodiment of a coil element (6), seen from an axial direction, whereby the plane shown runs perpendicular to the conductor elements (10).
  • FIGS. 2a and 2b also show a structure that is basically the same, with only the turning area W also being shown.
  • a transition (9) adjoins the connecting section (8) at both ends.
  • the connecting section (8) there are two further bending points (12) which are bent in opposite directions.
  • the further bending points (12) achieve an offset in the connecting section (8) with which, for example, changing the conductor elements (10) between different layers of the grooves (3) is simplified.
  • the other bending points (12) divide the connecting section into two parallel areas. Executions are also possible in which the further bending points (12) do not follow one another directly, but are separated from one another by a further area of the connecting section (8), as a result of which a greater offset can be achieved.
  • a common curvature is superimposed on the transitions (9) and the connecting section (8) in order to adapt their course to the diameter of a coil former (2).
  • a curvature can also be provided only at the transitions (9) or the connecting section (8).
  • Figures 1 a, 1 b, 2a and 2b are each with a symmetrical structure provides Darge.
  • embodiments are also possible which are not symmetrical and, for example, the transitions (9) are not designed in the same way or the further bending points (12) are not provided in the center of the connecting section (8).
  • bobbins (2) with wave windings are shown as comparative examples ne side by side.
  • the wave windings have the same winding scheme.
  • the coil elements (6 ‘) protruding axially further beyond the coil body (2) are designed differently.
  • the right comparative example with coil elements according to an embodiment according to the invention requires less installation space in the axial direction.
  • the coil can be made more compact in the axial direction or requires less space.
  • Fig. 4 shows a bobbin with a wave winding (1) according to the left comparison example according to FIG. 3, here as a stator.
  • a fol lowing wave winding described is also th with Spulenelemen according to the invention (6, 6 ') can be formed.
  • the stator has a coil body (2) in which grooves (3) are formed to accommodate the wave winding.
  • Robertele elements (10) are introduced in the example shown within the framework of Flairpins (6, 6 '), where several conductor elements (10) are introduced in layers for each groove (3).
  • the hairpins (6, 6 ') of the example shown each comprise two conductor elements (10), a turning area W in which the conductor elements (10) are integrally connected to one another, and contact areas K at the ends of the hairpins (6, 6').
  • the hairpins (6, 6 ') are, apart from the respective first and last hairpins (6, 6') of the individual coil strands, in their contact areas K with two contact pins (4) which each lead to the adjacent hairpin (6, 6) in the coil strand. 6 '), more precisely, be nem corresponding contact pin (4) are electrically connected.
  • the first and last hairpin (6, 6 ') of a coil strand has a contact pin (4) for connection to the adjacent hairpin (6, 6') of the coil strand and a connection pin (5) for connection to power electronics, not shown.
  • all contact pins (4) of the wave winding are arranged on the same axial side of the bobbin (2), whereby the turning areas W of the hairpins (6, 6 ') are accordingly on the opposite axial side of the bobbin (1 ) are arranged.
  • a uniform pattern with parallel turning areas W with a shortened winding pitch WK is formed, each of which is spanned by a turning area W with an extended winding pitch WL.
  • a number of hairpins (6) of the first variant with a shortened winding pitch WK and a hairpin (6 Hair) of the second variant with an extended winding pitch WL per pole are each provided adjacent to the number of holes q minus one.
  • two hairpins (6) of the first variant and one hairpin (6 ‘) of the second variant are each change from the right groove (3) to a middle groove (3) or from a middle groove (3) to a left groove (3) in the adjacent layer.
  • the hairpin (6 ‘) of the second variant is always used to switch between a left groove (3) and a right groove (3) in the adjacent layer.
  • FIG. 5 shows a winding scheme for a first coil strand analogous to the one shown in FIG.
  • grooves (3) with a number of holes of three, an embodiment with 54 grooves (3) being shown.
  • a development of the grooves (3) is shown with a representation of the eight layers here, and thus four double layers, per groove (3).
  • the conductor elements of the hairpins (6, 6 ') for parallel strands of a pole are shown in the three grooves (3) per pole and numbered in such a way that the number each has a letter for the strand and a two-digit Number includes.
  • the two conductor elements of the respective hairpin (6, 6 ‘) are differentiated with capital and small letters.
  • the first number indicates the double layer in which the hairpin (6, 6 ') is arranged, and the second number stands for consecutive numbering of the hair pins (6, 6') in the direction of current flow in this double layer .
  • connection pins (5) or, in other words, the corresponding first and last conductor elements of the coil strands are marked with arrows, the arrows for differentiating the different strands being shown with solid lines, dashed lines or dotted lines.
  • connection pins (5) of the individual coil strands are each provided in the radially outer position of the wave winding and the connection pins (5) of the parallel coil strands are each arranged in the same pole. Due to the arrangement in the radially outer layer, a connection to the power electronics can be made in the radial direction, so that no or only minimal construction space is required in the axial direction. Due to the arrangement in the same pole, the connection pins (5) for the cathode and the anode are each net angeord directly adjacent. The connection pins (5) of the parallel coil strands for the cathode and the anode are offset by one pole of the coil strand in the circumferential direction. Due to this training, only a small area of the scope is required for connection to the power electronics.
  • hairpins of the second variant are provided with an extended winding step WL.
  • two hairpins (6) of the first variant with a shortened winding pitch WK are provided in the exemplary embodiment shown in order to switch from a right to a middle groove (3) or from a middle to a left groove (3).
  • only hairpins (6, 6 ') of the first and second variant are provided. This achieves a high degree of symmetry, which reduces losses.
  • hairpins of a third variant with a standard winding step WS can also be provided.
  • the coil strands each first run through the radially outer double layer with the first partial strand.
  • the first sub-strand passes through a corresponding connection of the contact pins (4) into the second sub-strand, which runs through the next double layer in the same direction of the winding, analogous to the first sub-strand.
  • This transition between the double layers is shown in Fig.
  • the electrically conductive connection to the first contact pin (4) of the here fifth sub-strand is made by a bridge element (7).
  • a winding step corresponding to the standard winding step WS is carried out by the bridge element (7).
  • bridge elements (7) with different winding steps corresponding, for example, to the lengthened or shortened winding step are possible in order to switch between the grooves (3) at the transition between the partial strands.
  • the corresponding last or first contact pins (4) can be reshaped in the radial direction into a further layer and this to one of the original positions opposite circumferential direction are formed in order to be connected to the corresponding contact pin (4) directly, in the manner of the further contact pins (4), for example by means of welding.
  • the fifth part here which runs through the grooves in the opposite direction in the ra dial inner double layer, then merges into the sixth part, which also runs through the grooves (3) in the adjacent double layer. This transition is also indicated by way of example with an arrow with a dash-dot line.
  • the partial strands running back to the radially outer layer have an analogous structure to the aforementioned partial strands.
  • the last hairpin of the eighth partial strand here has at its end, which also shows the end of the coil strand, correspondingly to the connection pin (5) for connection to the power electronics.
  • connection pins (5) are provided on the radially inner layer or also embodiments in which connection pins (5) are provided on both the radially outer and the radially inner layer.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un élément de bobine (6, 6') pour une bobine de machine électrique, ledit élément comprenant au moins deux éléments conducteurs (10), qui s'étendent parallèlement et sont destinés à être placés dans des encoches (3) d'un corps de bobine (2), et au moins une partie de liaison (8) qui relie les deux éléments conducteurs (10) l'un à l'autre, les éléments conducteurs (10) et la partie de liaison (8) étant réalisés d'un seul tenant. L'invention est caractérisée en ce qu'un point de flexion (11, 11'), dans un plan défini par les deux éléments conducteurs (10), est situé uniquement au niveau d'une transition (9) entre un élément conducteur (10) et la partie de liaison (8), et en ce que la partie de liaison (8) s'étend en ligne droite. D'autres aspects de l'invention concernent un enroulement ondulé pour machine électrique comprenant au moins un tel élément de bobine ainsi qu'une machine électrique.
EP20780684.5A 2019-10-01 2020-09-25 Élément de bobine pour machine électrique Pending EP4038724A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019215097.7A DE102019215097A1 (de) 2019-10-01 2019-10-01 Spulenelement für eine elektrische Maschine
PCT/EP2020/076872 WO2021063822A1 (fr) 2019-10-01 2020-09-25 Élément de bobine pour machine électrique

Publications (1)

Publication Number Publication Date
EP4038724A1 true EP4038724A1 (fr) 2022-08-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20780684.5A Pending EP4038724A1 (fr) 2019-10-01 2020-09-25 Élément de bobine pour machine électrique

Country Status (5)

Country Link
US (1) US20220368186A1 (fr)
EP (1) EP4038724A1 (fr)
CN (1) CN114467243A (fr)
DE (1) DE102019215097A1 (fr)
WO (1) WO2021063822A1 (fr)

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DE102017218202A1 (de) * 2017-10-12 2019-04-18 Zf Friedrichshafen Ag Stator für eine elektrische Maschine
DE102018203471A1 (de) * 2018-03-08 2019-09-12 Zf Friedrichshafen Ag Wickelschema für eine elektrische Maschine
DE102018203469A1 (de) * 2018-03-08 2019-09-12 Zf Friedrichshafen Ag Wickelschema für eine elektrische Maschine

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WO2021063822A1 (fr) 2021-04-08
US20220368186A1 (en) 2022-11-17
DE102019215097A1 (de) 2021-04-01

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