Winding, component for an electric machine, electric machine, electric axle drive and motor vehicle

Abstract

A winding (110) for a component of an electric machine has an annular laminated core with slots for receiving a winding strand (111) of the winding (110) in a plurality of winding layers (L1, L2, L3, L4, L5, L6, L7, L8, L9). The winding strand (111) is composed of a first wire (U1) and a second wire (U4). First adjacent winding layers (L1, L2) are allocated to a first group (710), second adjacent winding layers (13, L4, 15, L6) are allocated to a second group (715), third adjacent winding layers (17, 18) are allocated to a third group (720) and one winding layer (L9) is allocated to a fourth group (725). A first partial section (220) of the first wire (U1) extending between the first group (710) and the second group (715) and / or a first partial section (225) of the second wire (U4) spans a first number of slots. A second partial section (230) of the first wire (U1) extending within the second group (715) and / or a second partial section (235) of the second wire (U4) spans a second number of slots. A third partial section (830) of the first wire (U1) extending between the third group (720) and the fourth group (725) spans a third number of slots.

Description

[0001] Winding, component for an electrical machine, electrical machine, electric axle drive and motor vehicle

[0002] The present invention relates to a winding, a component for an electrical machine, an electrical machine, an electric axle drive and a motor vehicle.

[0003] Electrical machines may include components with windings made of, for example, copper wires for conducting electrical energy to generate magnetic fields.

[0004] Against this background, the present invention provides an improved winding, an improved component for an electric machine, an improved electric machine, an improved electric axle drive, and an improved motor vehicle according to the main claims. Advantageous embodiments emerge from the subclaims and the following description.

[0005] The winding presented here advantageously has a compact circuit, which saves axial space.

[0006] A winding is provided for a component of an electrical machine, wherein the component comprises an annular laminated core with a plurality of grooves extending axially through the laminated core for receiving at least one winding strand of the winding in a plurality of radially adjacent winding layers. The winding comprises the winding strand, which is composed of a first wire and a second wire. The first wire forms a first connection pin and a further first connection pin, wherein the second wire forms a second connection pin and a further second connection pin. The wires are connected to one another via the further first connection pin and the further second connection pin.A first number of adjacent winding layers is assigned to a first group, a second number of adjacent winding layers is assigned to a second group, a third number of adjacent winding layers is assigned to a third group, and one winding layer is assigned to a fourth group. A first section of the first wire and / or the second wire running between the first group and the second group spans a first number of slots in the laminated core. A second section of the first wire and / or the second wire running within the second group spans a second number of slots in the laminated core that differs from the first number. A third section of the first wire running between the third group and the fourth group spans a third number of slots in the laminated core that differs from the first number and the second number.

[0007] The electrical machine can be, for example, an electric drive or another electrical machine, for example for a vehicle. The electrical machine can comprise various components, such as a rotor and a stator, similar to known electric motors. The component, for example an annular stator, can be designed as a laminated core made up of several individual sheets through which the slots for receiving the winding strand of the winding extend. The slots can be numbered along the circumference of the laminated core so that each slot can be assigned a unique position. The first group can correspond to a radially outer group, the second group and the third group can correspond to radially central groups, and the fourth group can correspond to a radially inner group. A winding strand can be composed of two wires.An electrical voltage can be applied to the winding strand via the connection pins. The winding can, for example, be a embossed and braided winding, a so-called braided winding.

[0008] Spanning the first and third number of slots of the lamination stack can each represent a phase shift. The phase shifts can also be referred to as an extended layer jump or a shortened layer jump and / or chord. In a multilayer winding, chord can be defined as the shifting of the winding layers. This shift can smooth the excitation curve and thus reduce the harmonics of the induced voltage. The chord can reduce the induced voltage amplitude, which is taken into account by the chord factor.

[0009] The approach presented here can therefore also be understood as braided winding with an odd number of layers and chord and / or as a continuous distributed winding for the electrical machine with an odd number of layers and chord.

[0010] The first number may be greater than the second number and the third number. The third number may be smaller than the first number. The first number may correspond to a number of exactly eight or at least eight or at least eleven grooves. The second number may correspond to a number of exactly seven or at least seven grooves, and the third number may correspond to a number of exactly six or at least six grooves.

[0011] A circuit area with a plurality of connection pins can be formed on a connection side of the winding. The subsections spanning the first and third number of slots of the laminated core are arranged exclusively within the circuit area.

[0012] The second wire can be wound exclusively in at least one winding layer and the first wire can be wound both in the at least one winding layer and in at least one further winding layer of the winding layers that differs from the at least one winding layer.

[0013] The first connection pin of the first wire and the second connection pin of the second wire can be arranged on the winding layer. The further first connection pin of the first wire can be arranged on the further winding layer.

[0014] The further second connection pin of the second wire can be arranged on an additional winding layer arranged adjacent to the further winding layer. This winding pattern can advantageously achieve electrical and mechanical symmetry of the winding. The winding layer can correspond to a radially outer winding layer or a radially inner winding layer. If the winding layer corresponds to the radially outer winding layer, the further winding layer can correspond to the radially inner winding layer. If the winding layer corresponds to the radially inner winding layer, the further winding layer can correspond to the radially outer winding layer.

[0015] The first wire can be wound in adjacent radially outer winding layers and in adjacent radially inner winding layers. The second wire can be wound exclusively in adjacent radially outer winding layers or exclusively in adjacent radially inner winding layers. This winding pattern allows for a compact winding head width.

[0016] The majority of the radially adjacent winding layers can correspond to an odd number of winding layers. This allows for high flexibility in electromagnetic designs.

[0017] The winding can comprise a second winding strand, which can be composed of a third wire and a fourth wire. The third wire can form a third connection pin and a further third connection pin. The fourth wire can form a fourth connection pin and a further fourth connection pin. The wires can be connected to one another via the further third connection pin and the further fourth connection pin. A first section of the third wire and / or the fourth wire running between the first group and the second group can each span a first number of slots in the laminated core. A second section of the third wire and / or the fourth wire running within the second group can each span a second number of slots in the laminated core that is different from the first number.A third subsection of the third wire extending between the third group and the fourth group can span a third number of slots in the laminated core that differs from the first number and the second number. The fourth wire can be wound exclusively in at least one winding layer, and the third wire can be wound both in the at least one winding layer and in at least one further winding layer of the winding layers that differs from the at least one winding layer. This combination advantageously allows the previously described advantages to be optimally implemented.

[0018] Furthermore, a component for an electrical machine with a variant of the previously presented winding is presented. The component comprises the annular laminated core with a plurality of grooves extending axially through the laminated core for receiving at least one winding strand of the winding in a plurality of radially adjacent winding layers. This combination advantageously allows the previously described advantages to be optimally implemented.

[0019] The component can have an additional winding, wherein the grooves are designed to accommodate at least one additional winding strand of the additional winding in the plurality of radially adjacent winding layers. According to one embodiment, the component can comprise three windings. The windings can, for example, correspond to three different phases, all of which can be wound according to the same winding pattern. This advantageously allows for the realization of a compact component with optimized interconnection of the individual phases.

[0020] An electrical machine may comprise a component, which may be embodied either as a stator or as a rotor. For example, the component may comprise the winding.

[0021] The electric machine is suitable, for example, for an electric axle drive. Such an electric axle drive for a motor vehicle comprises at least one named electric machine, a transmission device, and a power converter. The power converter can be designed, for example, as an inverter. Using the power converter, an electrical current required to operate the electric machine can be provided. Using the transmission device, a torque provided by the electric machine can be converted into a drive torque for driving at least one wheel of the motor vehicle. The transmission device can have a gearbox for reducing the speed of the electric machine and optionally a differential.

[0022] Accordingly, a motor vehicle may comprise a said electric machine and additionally or alternatively a said electric axle drive.

[0023] The invention is explained in more detail by way of example with reference to the accompanying drawings. They show:

[0024] Fig. 1 is a schematic representation of an embodiment of a component; Fig. 2 is a schematic representation of a winding strand of an embodiment of a winding;

[0025] Fig. 3 is a partial view of an embodiment of a component;

[0026] Fig. 4 is a schematic representation of an embodiment of a component;

[0027] Fig. 5 is a representation of an embodiment of a component;

[0028] Fig. 6 is a representation of an embodiment of a component;

[0029] Fig. 7 is a tabular representation of a winding diagram for an embodiment of a winding;

[0030] Fig. 8 is a tabular representation of a winding diagram for an embodiment of a winding; and

[0031] Fig. 9 is a representation of an embodiment of a motor vehicle.

[0032] In the following description of preferred embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, whereby a repeated description of these elements is omitted.

[0033] Fig. 1 shows a schematic representation of an exemplary embodiment of a component 100 for an electrical machine 105. Component 100 is shown in a three-dimensional view. According to the exemplary embodiment shown here, component 100 has a winding 110, a further winding 120, and an additional winding 130.

[0034] The component 100 is designed merely as an example as a stator and comprises an annular laminated core 115 with a plurality of slots N extending axially through the laminated core 115, of which, for the sake of clarity, only one is provided with the reference symbol N. The slots N are designed to accommodate at least one winding strand 111 of the windings 110, 120, 130 in a plurality of radially adjacent winding layers.

[0035] The component 100 has a connection side 112 and a wiring side 113. Connection pins of the windings 110, 120, 130 are arranged on the wiring side 113.

[0036] The stator shown here is designed merely as an example to accommodate a total of three windings 110, 120, 130, with winding 110 being assigned to a U-phase, the further winding 120 being assigned to a W-phase, and the additional winding 130 being assigned to a V-phase. In one embodiment, each winding 110, 120, 130 is formed with three parallel-wound winding strands 111.

[0037] Each winding strand consists of two wires, each of which forms two connecting pins. The wires are connected to each other via two of the connecting pins. Winding strand 111 is described and illustrated in more detail in Fig. 2.

[0038] According to one embodiment, each of the windings 110, 120, 130 has a plurality of connection pins for applying an electrical voltage at the innermost winding layer and / or at the outermost winding layer. For example, the windings 110, 120, 130 each have 18 connection pins at the innermost winding layer. Furthermore, each of the windings 110, 120, 130 has a plurality of connection pins for connecting wires of individual winding strands. For example, the windings 110, 120, 130 each have 9 connection pins at the outermost winding layer and 9 connection pins at a winding layer adjacent to the outermost winding layer.

[0039] According to one embodiment, first connection pins of three winding strands of the winding 110, first connection pins of three winding strands of the further winding 120, first connection pins of three winding strands of the additional winding 130, second connection pins of the three winding strands of the winding 110, second connection pins of the three winding strands of the further winding 120 and second connection pins of the three winding strands of the additional winding 130 are arranged directly adjacent to one another in the innermost winding layer.

[0040] According to one exemplary embodiment, in the outermost winding layer, further first connection pins of three winding strands of winding 110, further first connection pins of three winding strands of the further winding 120, and further first connection pins of three winding strands of the additional winding 130 are arranged directly adjacent to one another. Furthermore, in a winding layer adjacent to the outermost winding layer, further second connection pins of the three winding strands of winding 110, further second connection pins of the three winding strands of the further winding 120, and further second connection pins of the three winding strands of the additional winding 130 are arranged directly adjacent to one another, in the same grooves N as in the outermost winding layer.

[0041] Fig. 2 shows a schematic representation of a winding strand 111 of an exemplary embodiment of a winding. The winding strand 111 is similar to or corresponds to the winding strand shown in Fig. 1.

[0042] The winding strand 111 is composed of a first wire U1 and a second wire U4, wherein the wires U1, U4 represent connected sections of the winding strand 111.

[0043] The first wire U1 forms a first connection pin 200 and another first connection pin 210. The second wire U4 forms a second connection pin 205 and another second connection pin 215. The wires U1, U4 are connected to each other via the additional first connection pin 210 and the additional second connection pin 215. An electrical voltage is applied to the winding strand 111 via the connection pins 200, 205 of the winding strand 111.

[0044] Each of the wires U1, U4 has a plurality of subsections 220, 230, 225, 235, which are guided in a loop-like manner through the grooves of the laminated core.

[0045] The subsections 220, 230, 225, 235 span a different number of slots in the laminated core when wound. For example, a first subsection 220 of the first wire U1 spans eleven slots, and a second subsection 230 of the first wire U1 spans seven slots. A third subsection spans six slots, for example. A first subsection 225 of the second wire U2 also spans eleven slots, and a second subsection 235 of the second wire U2 spans seven slots. The subsections 220, 230, 225, 235 run between and / or within groups of the winding layers, as shown, for example, in Fig. 8.

[0046] Spanning the merely exemplary eight and / or eleven grooves represents an extended layer jump, and spanning the merely exemplary six grooves represents a shortened or reduced layer jump. Spanning merely exemplary seven grooves corresponds to a normal layer jump.

[0047] Fig. 3 shows a partial representation of an embodiment of a component 100 for an electrical machine with the windings 110, 120, 130. The component 100 is similar to or corresponds to the component from Fig. 1.

[0048] Shown is a section of a side view of component 100. This shows, for example, the connection pins of the winding phases. The winding phases assigned to winding 110 have, for example, a total of six connection pins. A circuit region 300 is marked by a double arrow. The circuit region 300 represents, merely by way of example, the region in which the at least one extended layer jump and the shortened layer jump occur. According to one exemplary embodiment, all connection pins of the winding phases are located within the circuit region 300. The circuit region 300 extends, for example, over approximately a quarter of a circumference of the laminated core 115, for example over less than a half and more than a third of the circumference.

[0049] Due to the wiring and routing of the winding 110, a low winding head height 305 is possible. The height of the winding heads increases only locally in the circuit area 300.

[0050] Fig. 4 shows a schematic representation of an embodiment of a component 100 for an electrical machine with windings 110, 120, 130. The component 100 is similar to or corresponds to the component from one of the figures described above.

[0051] Shown is a top view of the circuit side 113 of the component 100. The circuit area 300 is marked by double arrows.

[0052] Fig. 5 shows an illustration of an embodiment of a component 100. Component 100 is similar to the component from one of the figures described above. A section of component 100 is shown in plan view.

[0053] Each winding 110, 120, 130 has three winding strands which are wound continuously in the winding layers L1, L2, L3, L4, L5, L6, L7, L8, L9.

[0054] According to one embodiment, an extended layer jump occurs between the second winding layer L2 and the third winding layer L3. A shortened layer jump occurs between the eighth winding layer L8 and the ninth winding layer L9. Fig. 6 shows an illustration of an embodiment of a component 100. The component 100 is similar to the component from Fig. 5, with the winding strands of the windings 110, 120, 130 being wound according to a different winding pattern.

[0055] Fig. 7 shows a tabular representation of a winding pattern 700 for an exemplary embodiment of a winding 110 for a component. More specifically, the winding pattern 700 is shown for the three windings 110, 120, 130.

[0056] The winding pattern 700 shown here is exemplified for a component with a laminated core with, for example, 72 slots and a respective number of holes 3 for accommodating, for example, three windings 110, 120, 130. The positions 1 to 72 of the slots along the circumference of the laminated core are indicated in the top four rows of the table, wherein the top row corresponds to an outer backtwist layer 705, the row arranged below it corresponds to the winding 110, the row arranged below it corresponds to the further winding 120 and the row arranged below it corresponds to the additional winding 130.

[0057] The winding 110 is assigned, for example, to the U phase, the further winding 120 is assigned, for example, to a W phase, and the additional winding 130 is assigned, for example, to the V phase. For example, each winding 110, 120, 130 is formed with a total of three parallel wound winding strands, each with a plurality of wires U1, U2, U3, U4, U5, U6.

[0058] Nine rows below the position markings correspond, by way of example, to nine winding layers L1, L2, L3, L4, L5, L6, L7, L8, L9 of the windings 110, 120, 130. In this case, the first winding layer L1 shown in the topmost of the ten rows in the illustration shown here corresponds, by way of example, to a radially outermost winding layer. A second winding layer L2 is arranged adjacent to the first winding layer L1, i.e. in the row directly below it in the table shown here. The third winding layer L3 is arranged adjacent to the second winding layer L2, and the fourth winding layer L4 is arranged adjacent to the third winding layer L3. The fifth winding layer L5 is arranged adjacent to the fourth winding layer L4, and the sixth winding layer L6 is arranged adjacent to the fifth winding layer L5. Adjacent to the sixth winding layer L6 is the seventh winding layer L7, followed by the eighth winding layer L8 and the ninth winding layer L9.The majority of the radially adjacent winding layers L1, L2, L3, L4, L5, L6, L7, L8, L9 corresponds to an odd number of winding layers.

[0059] The winding layers L1, L2, L3, L4, L5, L6, L7, L8, L9 are assigned to different groups, with the winding layers L1, L2 being assigned to a first group 710. The winding layers L3, L4, L5, L6 are assigned to a second group 715, the winding layers L7 and L8 to a third group 720, and the winding layer L9 is assigned to a fourth group 725. According to one exemplary embodiment, the first group 710 corresponds to a radially outer group of the exemplary three-layer winding 110. The second group 715 and third group 720 correspond to radially central groups, and the fourth group 725 corresponds to a radially inner group of the winding 110.

[0060] In the bottom row of the table shown here, inputs and outputs for inserting wires of the windings 110, 120, 130 into the laminated core and for leading wires of the windings 110, 120, 130 out of the laminated core are marked merely as examples.

[0061] The winding pattern 700 is shown and described in more detail in the following Fig. 8.

[0062] Fig. 8 shows a tabular representation of the winding pattern 700 for an exemplary embodiment of a winding 110 for a component. The winding pattern 700 corresponds to the winding pattern described in Fig. 7, with the exception that a section of the winding pattern 700 and the connection pins of the winding 110 are shown. In this exemplary embodiment, the winding 110 comprises, for example, three winding strands. The first winding strand is composed of the first wire U1 and the second wire U4.

[0063] The first wire U1 forms a first connection pin 200 and a further first connection pin 210. The second wire U4 forms a second connection pin 205 and a further second connection pin 215. The wires U1, U4 are connected to one another via the further first connection pin 210 and the further second connection pin 215. The first connection pin 200 and the second connection pin 205 are each shown by means of an arrow only as an example. The direction of the arrow of the first connection pin 200 additionally indicates the position in which the winding strand 111 is inserted into the first winding layer L1, here only as an example. The direction of the arrow of the second connection pin 205 indicates the position in which the winding strand 111 is led out of the first winding layer L1. The connection pins 200, 205 are therefore arranged on the first winding layer L1.The further first connection pin 210 is located on the ninth winding layer L9, and the further second connection pin 215 is located on the eighth winding layer L8. This is where the first wire U1 and the second wire U4 connect.

[0064] According to the winding scheme 700 shown here, the second wire U4 is wound exclusively in the winding layers L1, L2, L3, L4, L5, L6, L7, L8 and the first wire U1 is wound both in the winding layers L1, L2, L3, L4, L5, L6, L7, L8 and in the radially inner winding layer L9.

[0065] Alternatively, a reversed arrangement is also possible, so that the second wire U4 is wound in the winding layers L1, L2, L3, L4, L5, L6, L7, L8 as well as in the radially inner winding layer L9 and the first wire U1 is wound in the winding layers L1, L2, L3, L4, L5, L6, L7, L8 as well as in the radially inner winding layer L9.

[0066] The extended layer jump 520 and shortened layer jump 530 described in the previous figures, i.e., spanning a certain number of slots, are shown here only as examples. To explain the approach presented here, the winding pattern 700 is described only as an example using the first wire U1 and the second wire U4.

[0067] The first wire U1 is arranged, for example, in an entry slot of the slots, wherein the entry slot is arranged at an entry position 68 within the first winding layer L1. Starting from the entry position, the first wire U1 is guided in a winding direction R into the second winding layer L2. From the second winding layer L2, the first wire U1 is guided back into the first winding layer L1. The first wire U1 is thus continuously wound in the radially adjacent winding layers L1, L2 of the first group 710. Starting from a position 6 within the second winding layer L2, the first wire U1 is guided into the third winding layer L3. The first partial section 220 of the first wire U1 spans the first number of slots of the laminated core, here only eight slots by way of example. The extended layer jump 520 thus occurs between the second winding layer L2 and the third winding layer L3 or between the first group 710 and the second group 715.In the second group 715, the first wire U1 is then wound continuously in the radially adjacent winding layers L3, L4.

[0068] Starting from a position 4 within the fourth winding layer L4, the first wire U1 is guided into the fifth winding layer L5. A second partial section 230 of the first wire U1 spans the second number of slots of the laminated core, here, for example, only seven slots. Thus, the normal layer jump 810 occurs between the fourth winding layer L4 and the fifth winding layer L5, or within the second group 715. In the second group 715, the first wire U1 is then continuously wound in the radially adjacent winding layers L5, L6.

[0069] Starting from a position 6 within the winding layer L6, the first wire U1 is guided into the winding layer L7. A further partial section 820 of the first wire U1 spans the first number of slots in the laminated core, here only eleven slots as an example. The extended layer jump 520 therefore occurs between the sixth winding layer L6 and the seventh winding layer L7 or between the second group 715 and the third group 720. In the third group 720, the first wire U1 is then wound continuously in the radially adjacent winding layers L7, L8. Starting from a position 4 within the winding layer L8, the first wire U1 is guided into the winding layer L9. A third partial section 830 of the first wire U1 spans the third number of slots in the laminated core, here only six slots as an example. The shortened layer jump 530 therefore occurs between the eighth winding layer L8 and the ninth winding layer L9 orbetween the third group 715 and the fourth group 725. In the fourth group 725, the first wire U1 is then wound continuously in the radially inner winding layer L9.

[0070] Starting from the radially inner winding layer L9, the first wire U1 is connected to the second wire U4. This is done via the additional connection pins 210, 215. The direction of the arrows on the additional connection pins 210, 215 indicates the direction in which the first wire U1 is connected to the second wire U4.

[0071] The second wire U4 is wound similarly to the first wire U1, so that the second wire LJ4 also forms an extended layer jump 810 between the first group 710 and the second group 715, i.e., between the winding layer L2 and the winding layer L3, and between the second group 715 and the third group 720, i.e., between the winding layer L6 and the winding layer L7. The second wire U4, for example, also forms a normal layer jump 810 within the second group, between the winding layer L4 and the winding layer L5.

[0072] According to the embodiment shown here, the shortened layer jump 530 is carried out exclusively by the first wire U1.

[0073] More specifically, the first subsection 225 of the second wire U4 spans the first number of slots of the laminated core. The second subsection 235 of the second wire U4 spans the second number of slots of the laminated core, and another subsection 825 of the second wire U4 spans the first number of slots of the laminated core.

[0074] According to one embodiment, winding 110 comprises the second winding strand, which is composed of a third wire U2 and a fourth wire U5. The third winding strand of winding 110 is composed of a fifth wire U3 and a sixth wire U6. The winding strands are wound identically to the first winding strand.

[0075] In the winding scheme 700 described and shown here, the second wire U4 is wound exclusively in the winding layers L1, L2, L3, L4, L5, L6, L7, L8, and the first wire U1 is wound both in the winding layer L9 and in the winding layers L1, L2, L3, L4, L5, L6, L7, L8. Alternatively, the second wire U4 is wound exclusively in the winding layers L2, L3, L4, L5, L6, L7, L8, L9, and the first wire U1 is wound both in the winding layer L1 and in the winding layers L2, L3, L4, L5, L6, L7, L8, L9.

[0076] In other words, the winding layer L9 is wound exclusively from the wires U1, U2, U3 of the winding 110, the wires W1, W2, W3 of the further winding 120 and the wires V1, V2, V3 of the additional winding 130. The winding layers L1, L2, L3, L4, L5, L6, L7, L8 are wound from the wires U1, U2, U3, U4, U5, U6 of the winding 110, the wires W1, W2, W3, W4, W5, W6 of the further winding 120 and the wires V1, V2, V3, V4, V5, V6 of the additional winding 130.

[0077] The winding pattern 700 shown here is intended for a stamped and braided winding 110, with a number of holes Q 3, an odd number of layers L, here for example nine layers in the slot.

[0078] Either only the radially inner winding layer L9 or only the radially outer winding layer L1 is wound in the slot from half of the adjacent wires, for example 9 wires, of for example 18 parallel wires for the entire winding.

[0079] Either only the radially inner winding layer L9 or only the radially outer winding layer L1 in the slot has two radial layers in the winding head on both sides. Either 18 connection pins are arranged on the radially inner winding layer L9 and 9 connection pins each on the radially outer winding layer L1 and the second outermost winding layer L2, or 18 connection pins are arranged on the radially outer winding layer L1 and 9 connection pins each on the radially inner winding layer L9 and the second innermost layer L8.

[0080] The phase shift or chord occurs via both the extended layer jump 810 and the shortened layer jump 530 at different radial positions in the interconnection area. For example, the phase shift between layers two and three and between layers six and seven occurs via the extended layer jump 810 in the interconnection area, and between layers eight and nine via the shortened layer jump 530 in the interconnection area.

[0081] The approach presented here enables greater flexibility for electromagnetic designs, an odd number of layers, and good manufacturability. Furthermore, a highly symmetrical winding head is possible on both sides, resulting in favorable thermal behavior and good electromagnetic compatibility (EMC). The 700 winding pattern achieves a compact winding head width and has a marginal impact on the winding head height.

[0082] Fig. 9 shows an illustration of an embodiment of a motor vehicle 900. The motor vehicle 900 has an electric axle drive 910 with an electric machine 105, as described, for example, with reference to the previous figures. Electrical energy for operating the electric machine 105 is provided by a power supply device 902, for example a battery. For example, the power supply device 902 provides a direct current, which is converted into an alternating current, for example a three-phase alternating current, using a power converter 904 of the transmission device and is provided to the electric machine 105. A shaft driven by the electric machine 105 is coupled directly or using a transmission device 906 to at least one wheel 908 of the motor vehicle 900.Thus, the motor vehicle 900 can be propelled using the electric machine 105. According to one embodiment, the electric axle drive 910 comprises a housing in which the power converter 904, the electric machine 105, and the transmission device 906 are arranged in an integrated manner.

[0083] Reference symbol

[0084] Component electrical machine

[0085] Winding first winding strand of the winding

[0086] Connection page

[0087] Wiring page

[0088] Laminated core additional winding additional winding first connection pin second connection pin further first connection pin further second connection pin first section of the first wire first section of the second wire second section of the first wire second section of the second wire

[0089] Circuit area

[0090] Winding head height extended layer jump shortened layer jump

[0091] Winding scheme outer back twist layer first group second group third group fourth group 810 normal layer jump

[0092] 820 further section of the first wire

[0093] 825 further section of the second wire

[0094] 830 third section of the first wire

[0095] 900 motor vehicles

[0096] 902 Energy supply facility

[0097] 904 power converters

[0098] 906 transmission device

[0099] 908 wheel

[0100] 910 electric axle drive

[0101] L1 first winding layer

[0102] L2 second winding layer

[0103] L3 third winding layer

[0104] L4 fourth winding layer

[0105] L5 fifth winding layer

[0106] L6 sixth winding layer

[0107] L7 seventh winding layer

[0108] L8 eighth winding layer

[0109] L9 ninth winding layer

[0110] N grooves

[0111] R Winding direction

[0112] U1 first wire of the winding

[0113] U2 third wire of the winding

[0114] U3 fifth wire of the winding

[0115] U4 second wire of the winding

[0116] U5 fourth wire of the winding

[0117] U6 sixth wire of the winding W1 first wire of the further winding

[0118] W2 third wire of the further winding

[0119] W3 fifth wire of the further winding

[0120] W4 second wire of the further winding

[0121] W5 fourth wire of the further winding

[0122] W6 sixth wire of the further winding

[0123] V1 first wire of the additional winding

[0124] V2 third wire of the additional winding

[0125] V3 fifth wire of the additional winding

[0126] V4 second wire of the additional winding

[0127] V5 fourth wire of the additional winding

[0128] V6 sixth wire of the additional winding

Claims

Patent claims 1 . Winding (110) for a component (100) of an electrical machine (105), wherein the component (100) comprises an annular laminated core (115) with a plurality of slots (N) extending axially through the laminated core (115) for receiving at least one winding strand (111) of the winding (110) in a plurality of radially adjacently arranged winding layers (L1, L2, L3, L4, L5, L6, L7, L8, L9), wherein the winding (110) comprises the winding strand (111), which is composed of a first wire (U1) and a second wire (U4), wherein the first Wire (U1) forms a first connection pin (200) and a further first connection pin (210), wherein the second wire (U4) forms a second connection pin (205) and a further second connection pin (215), wherein the wires (U1, U4) are connected to one another via the further first connection pin (210) and the further second connection pin (215), wherein a first number of adjacent winding layers (L1, L2) is assigned to a first group (710), wherein a second number of adjacent winding layers (L3, L4, L5, L6) is assigned to a second group (715), wherein a third number of adjacent winding layers (L7, L8) is assigned to a third group (720), wherein a winding layer (L9) is assigned to a fourth group (725),wherein a first subsection (220) of the first wire (U1) and / or a first subsection (225) of the second wire (U4) extending between the first group (710) and the second group (715) each spans a first number of slots (N) of the laminated core (115), wherein a second subsection (230) of the first wire (U1) and / or a second subsection (235) of the second wire (U4) extending within the second group (715) each spans a second number of slots (N) of the laminated core (115) that differs from the first number, wherein a third subsection (830) of the first wire (U1) extending between the third group (720) and the fourth group (725) each spans a third number of slots (N) of the laminated core (115) that differs from the first number and the second number overstretched., 2. Winding (110) according to claim 1, wherein the first number is greater than the second number and the third number, wherein the third number is less than the first number.

3. Winding (110) according to one of the preceding claims, wherein a circuit region (300) with a plurality of connection pins is formed on a wiring side (113) of the winding (110), wherein the partial sections (220, 225, 820, 825, 830) spanning the first number and third number of slots (N) of the laminated core (115) are arranged exclusively within the circuit region (300).

4. Winding (110) according to one of the preceding claims, wherein the second wire (U4) is wound exclusively in at least one winding layer (L1, L9) and wherein the first wire (U1) is wound both in the at least one winding layer (L1, L9) and in at least one further winding layer (L2, L3, L4, L5, L6, L7, L8) of the winding layers that is different from the at least one winding layer (L1, L9).

5. Winding (110) according to one of the preceding claims, wherein the first connection pin (200) of the first wire (U1) and the second connection pin (205) of the second wire (U4) are arranged on the winding layer (L1, L9), wherein the further first connection pin (210) of the first wire (U1) is arranged on the further winding layer (L2, L3, L4, L5, L6, L7, L8).

6. Winding (110) according to one of the preceding claims, wherein the further second connection pin (215) of the second wire (U4) is arranged on an additional winding layer (L8) arranged adjacent to the further winding layer (L9).

7. Winding (110) according to one of the preceding claims, wherein the winding layer (L1) corresponds to a radially outer winding layer (L1) or a radially inner winding layer (L9).

8. Winding (110) according to one of the preceding claims, wherein the first wire (U1) is wound in adjacently arranged radially outer winding layers (L1, L2) and in adjacently arranged radially inner winding layers (L8, L9), wherein the second wire (U4) is wound exclusively in adjacently arranged radially outer winding layers (L1, L2) or is wound exclusively in adjacent radially inner winding layers (L8, L9).

9. Winding (110) according to one of the preceding claims, wherein the plurality of radially adjacent winding layers (L1, L2, L3, L4, L5, L6, L7, L8, L9) corresponds to an odd number of winding layers 10. Winding (110) according to one of the preceding claims, wherein the winding (110) comprises a second winding strand composed of a third wire (U2) and a fourth wire (U5), wherein the third wire (U2) forms a third connection pin and a further third connection pin, wherein the fourth wire (U5) forms a fourth connection pin and a further fourth connection pin, wherein the wires (U2, U5) are connected to one another via the further third connection pin and the further fourth connection pin, wherein a first section of the third wire (U2) and / or the fourth wire (U5) running between the first group (710) and the second group (715) each spans a first number of slots (N) of the laminated core (115), wherein a second section of the (U2) and / or the fourth wire (U5) running within the second group (715) Wire (U5) each spans a second number of slots (N) of the laminated core (115) that differs from the first number, wherein a third section of the third wire (U2) running between the third group (720) and the fourth group (725) spans a third number (6 slots) of slots (N) of the laminated core (115) that differs from the first number and the second number.

11. Component (100) for an electrical machine (105) with a winding (110) according to one of the preceding claims and with the annular laminated core (115) with the plurality of slots (N) extending axially through the laminated core (115) for receiving at least one winding phase (111) of the winding (110) in a plurality of radially adjacent winding layers (L1, L2, L3, L4, L5, L6, L7, L8, L9).

12. Component (100) according to claim 11, with a further winding (120), wherein the slots (N) are designed to receive further winding strands of the further winding tion (120) is formed into the plurality of radially adjacent winding layers (L1, L2, L3, L4, L5, L6, L7, L8, L9).

13. Electrical machine (105) with a component (100) according to one of claims 11 to 12, wherein the component (100) is designed as a stator or as a rotor of the electrical machine (105) and comprises a winding (110) according to one of claims 1 to 10.

14. Electric axle drive (910) for a motor vehicle (900) with at least one electric machine (105), a transmission device (906) and a power converter (904), characterized in that the electric machine (105) is designed according to claim 13.

15. Motor vehicle (900) comprising an electric machine (105) according to claim 13 and / or an electric axle drive (910) according to claim 14.

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