Winding, winding arrangement and assembly for electric machine
By adopting annular laminate and multi-layer winding layers in the motor winding, the problem of high pitch copper weight is solved, and material cost savings and manufacturing simplification is achieved.
Patent Information
- Application Number
- CN202380056788.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-03
- Filing Date
- 2023-08-02
- Publication Date
- 2025-03-14
AI Technical Summary
The existing motor windings have a large copper weight when achieving pitch, resulting in high material costs and complex manufacturing.
Using an annular laminate set, a portion of the strands of the winding are accommodated through a plurality of grooves and distributed in a plurality of radially adjacent winding layers, reducing copper weight and simplifying manufacturing.
Minimize pitch copper weight, save material costs, and improve winding manufacturability and wiring compactness.
Smart Images
Figure CN119631280A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a winding for an electric machine, a winding arrangement, a component, an electric machine, a transmission, an electric shaft drive and a motor vehicle. Background Art
[0002] The electric machine may include an assembly having a winding, for example made of copper wire, for conducting electrical energy to generate a magnetic field. The pitch (tension) between the loops of such a winding may be realized as a flat wire winding in terms of losses and additional movement on the complete winding layer of the assembly or additional wiring elements. Summary of the invention
[0003] Against this background, the invention proposes an improved winding for an electric machine, an improved winding arrangement, an improved component, an improved electric machine, an improved transmission, an improved electric shaft drive and an improved motor vehicle according to the independent claims. Advantageous refinements result from the dependent claims and the following description.
[0004] By means of the winding introduced here, it is possible to more advantageously minimize the copper weight used to realize the pitch and save material costs. In addition, the winding has good manufacturability and compact wiring.
[0005] A winding is provided for a component of an electric machine, wherein the component comprises an annular laminated core having a plurality of grooves extending axially through the laminated core, the grooves being used to accommodate partial strands of the winding, the partial strands of the winding being located in a plurality of radially adjacently arranged winding layers. Here, the winding layers comprise at least one radially outermost outer layer and a radially innermost inner layer, and at least one intermediate layer arranged adjacent to the outer layer and another intermediate layer arranged adjacent to the inner layer. Here, a first subset of the partial strands of the winding are guided through the inner layer and the other intermediate layer, and a second subset of the partial strands corresponding to the first subset are guided through the intermediate layer and the outer layer, and a third subset of the partial strands corresponding to the first subset and the second subset are guided through the outer layer and the intermediate layer, and a fourth subset of the partial strands corresponding to the first subset, the second subset and the third subset are guided through the other intermediate layer and the inner layer.
[0006] The motor can be, for example, an electric drive motor or another motor for a vehicle. The motor can include various components, such as a rotor and a stator. The component, such as an annular stator, can be designed as a stack of laminations consisting of a plurality of individual laminations, through which grooves for accommodating partial strands of the winding extend. The grooves can be numbered consecutively along the circumference of the lamination stack, so that a unique position can be assigned to each groove. Each groove can accommodate a plurality of partial strands, which can be arranged radially adjacent in the groove. The number of partial strands that a groove can accommodate can be equal to the number of winding layers. Therefore, the winding layer can represent different sections of the groove. The winding can be, for example, a flat wire winding, and the individual partial strands of the flat wire winding can be designed, for example, as so-called hairpin wires, i.e., conductive wires with a shape similar to a hairpin, which can be interconnected to each other on the torsion side of the component. The winding can, for example, include four winding layers, with an outer layer, an inner layer, and, for example, two intermediate layers located therebetween. Partial strands of the winding can be guided through winding layers arranged adjacent to each other, for example, partial strands of the first subset can extend from the inner layer to another middle layer and interconnected with the second partial strand, which can also extend from the inner layer to another middle layer. Here, these partial strands can, for example, extend parallel to each other and spaced apart from each other along the circumference of the lamination stack. In a similar manner, for example, partial strands of the second subset can extend from the middle layer to the outer layer and interconnected with the second partial strand of the second subset, which can also extend from the middle layer to the outer layer. In a similar manner, partial strands of the third subset can extend from the outer layer to the middle layer, respectively, and partial strands of the fourth subset can extend from another middle layer to the inner layer. Advantageously, almost all partial strands of the winding can have the same size, i.e., the same coil width, which can simplify manufacturing. Here, each subset can include an equal number of partial strands, so as to advantageously achieve uniform distribution, thereby achieving optimized winding. For so-called loop skipping, the winding step length starting from one winding layer or one loop can be reduced accordingly depending on the pitch (tension) of the winding and positioned in the middle layer. This can advantageously keep the winding step length normal at other locations and achieve an optimal winding head height, for example, for stators with or without pitch (tension). Additional interconnecting elements can be omitted, which can save material and costs.
[0007] According to one embodiment, the first and second subsets of partial strands may be wound along a first main direction of the winding, and the third and fourth subsets of partial strands may be wound along a second main direction of the winding opposite to the first main direction. For example, the winding may include 24 partial strands, which may be wound into, for example, four winding layers along an annular stack of laminations. For example, the first half of the partial strands may be wound along the first main direction, for example clockwise around the annular stack of laminations. Then, the second half of the partial strands may be wound along the opposite second main direction, i.e., for example counterclockwise.
[0008] According to another embodiment, these subsets of partial strands can respectively correspond to one quarter of the total number of partial strands. These subsets can be consistent with the number of winding layers, for example. In a winding having, for example, four winding layers, each winding layer can, for example, be composed of one quarter of the total number of partial strands. The advantage of this is that the partial strands of the winding can be evenly distributed on each winding layer. For example, if the winding includes a large number of winding layers, the subsets of partial strands can also be evenly distributed on these layers. For example, when the number of winding layers is six, each subset of partial strands can include one sixth of the total number of partial strands.
[0009] According to another embodiment, the first partial strands of the first subset can be interconnected with an external connector, and the last partial strand of the first subset can be interconnected with the first partial strand of the second subset. The last partial strand of the second subset can in turn be interconnected with the first partial strand of the third subset, the last partial strand of the third subset can be interconnected with the first partial strand of the fourth subset, and the last partial strand of the fourth subset can be interconnected with another external connector. For example, the last partial strand of the first subset can start from another intermediate layer and be interconnected with the first partial strand of the second subset, the first partial strand, for example, entering an adjacently arranged intermediate layer. Thus, the interconnection between the subsets can be performed, for example, across adjacently arranged winding layers, or, for example, within the same winding layer, so as to advantageously achieve compact interconnection with minimal copper weight and minimal winding head size. In addition, advantageously, a voltage can be applied via an external connector and another external connector so that a current can flow in the winding.
[0010] In addition, other partial strands of the first subset can be interconnected to each other across layers. Additionally or alternatively, other partial strands of the second subset can be interconnected to each other across layers, and additionally or alternatively, other partial strands of the third subset can be interconnected to each other across layers, and additionally or alternatively, other partial strands of the fourth subset can be interconnected to each other across layers. Each partial strand can be inserted into a corresponding groove in the lamination stack as a hairpin, for example, and interconnected to each other on the torsion side of the winding. For this purpose, for example, the two free end segments of the two partial strands can be bent toward each other, and for example, conductively connected to each other or twisted around each other. Here, each partial strand can, for example, extend parallel to each other. For example, the first partial strand of the first subset can enter the inner layer and extend out in another intermediate layer arranged adjacently, wherein the first output position of the first partial strand can be arranged spaced apart from the first input position of the first partial strand along the circumference of the lamination stack. The first portion of strands can be interconnected with the second portion of strands of the first subset, which can enter, for example, at a second input position spaced circumferentially from the first output position in the inner layer of the winding layer, and extend out at the second output position spaced equally in another intermediate layer, similarly to the first portion of strands. In this way or in a similar way, the partial strands can be stretched in a zigzag shape along the winding layers adjacent to each other and interconnected to each other. The partial strands of the second subset can similarly be stretched in the intermediate layer and the outer layer and interconnected across layers. Similarly, the partial strands of the third subset can be stretched in the outer layer and the intermediate layer and interconnected across layers, and the partial strands of the fourth subset can similarly be stretched in another intermediate layer and the inner layer and interconnected across layers.
[0011] According to another embodiment, partial strands of the second subset can be interconnected with partial strands of the third subset in the outer layer. For example, the last partial strand of the second subset can extend from the middle layer to the outer layer and be interconnected with the first partial strand of the third subset arranged spaced apart along the circumference of the lamination stack in the outer layer. The first partial strand of the third subset itself can enter in the outer layer, extend out in the adjacently arranged middle layer, and be interconnected with another partial strand of the third subset. Here, the interconnection of the two partial strands in the outer layer can advantageously cause a change in the direction of the winding. For example, partial strands of the first subset and the second subset can be wound along a first main direction of the winding, while partial strands of the third subset and the fourth subset can be wound along an opposite second main direction of the winding.
[0012] Furthermore, a winding arrangement having at least a first partial winding and a second partial winding is proposed. The first partial winding and, additionally or alternatively, the second partial winding correspond to the previously proposed winding variants. For example, the winding arrangement can include two or three partial windings wound in parallel to one another according to the same or similar scheme. For example, the same phase can be conducted in all partial windings.
[0013] Furthermore, an assembly for an electric machine having a variant of the previously proposed winding is proposed. The assembly also comprises an annular laminated core having a plurality of grooves extending axially through the laminated core, the grooves being used to accommodate partial strands of the winding, which are located in a plurality of radially adjacent winding layers. With this combination, the advantages described previously can advantageously be optimally achieved. For example, the assembly can comprise three of the above-mentioned windings, in order to guide three different phases, for example, wherein all windings can be wound according to the same winding scheme. Advantageously, a compact assembly can thereby be achieved, with the phases being optimally interconnected.
[0014] The electric machine can include the mentioned component, which can be designed as a stator or a rotor. For example, the component can include three of the mentioned windings.
[0015] The electric motor is suitable, for example, for an electric axle drive. Such an electric axle drive for a motor vehicle comprises at least one of the above-mentioned electric motors, a transmission and a converter. The converter can be designed, for example, as an inverter. Using the converter, the current required for operating the electric motor can be provided. Using the transmission, the torque provided by the electric motor can be converted into a driving torque for driving at least one wheel of the motor vehicle. The transmission can have a transmission for reducing the speed of the electric motor and an optional differential.
[0016] Thus, the motor vehicle can comprise the electric machine and, additionally or alternatively, the electric axle drive. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The invention will now be described in more detail by way of example with reference to the accompanying drawings.
[0018] Figure 1 is a schematic side view of an assembly of an electric machine with windings according to one embodiment;
[0019] Figure 2 is a schematic partial view of an assembly having a winding arrangement according to one embodiment;
[0020] Figure 3 is a schematic partial view of an assembly with a winding according to one embodiment;
[0021] Figure 4 is a tabular representation of one embodiment of a winding scheme for a winding arrangement;
[0022] Figure 5 is a schematic diagram of a winding scheme according to one embodiment;
[0023] Figure 6 is a schematic diagram of a first portion of strands according to one embodiment; and
[0024] Figure 7 is a schematic diagram of a motor vehicle according to one embodiment. DETAILED DESCRIPTION
[0025] In the following description of preferred exemplary embodiments of the present invention, identical or similar reference numerals are used for elements that are shown in the various figures and have similar functions, wherein a repeated description of these elements is omitted.
[0026] Figure 1 A schematic side view of an assembly 100 with a winding 110 of an electric machine 105 according to an embodiment is shown. The assembly 100 is designed as a stator only by way of example and comprises an annular lamination stack 115 having a plurality of grooves extending axially through the lamination stack for accommodating partial strands of the winding 110 in a plurality of radially adjacently arranged winding layers. The winding layers comprise a radially outermost outer layer, a radially innermost inner layer, an intermediate layer arranged adjacent to the outer layer, and another intermediate layer arranged between the intermediate layer and the inner layer.
[0027] Some of the strands of the winding 110 are designed as flat wires for conducting electrical energy flow only by way of example, and these flat wires have a hairpin-like shape, so they can also be called hairpins or hairpin wires. For example, each hairpin has two sections or legs that are guided through a groove in the lamination stack, respectively, and they are connected to each other on the crown side 117 of the component 100. On the torsion side 118 opposite to the crown side 117, the free end of each hairpin wire can be interconnected with another wire. In order to guide the current, the winding 110 also has an external connector U1 and another external connector U2. Through the external connectors U1 and U2, a voltage can be applied to the entire winding, for example, for guiding a specific phase.
[0028] Figure 2 A schematic partial view of an assembly 100 with a winding arrangement 200 according to one embodiment is shown. The assembly 100 shown here corresponds to or is similar to the assembly described in the previous figures and is shown from the torsion side in the figure shown here.
[0029] In this embodiment, the assembly is designed to accommodate a total of three winding arrangements 200, 205, 210. Merely by way of example, the winding arrangements 200, 205, 210 are designed to guide one phase each. Therefore, in one embodiment, the winding arrangement 200 is only exemplarily designed to guide the U phase. The further winding arrangement 205 is, for example, designed to guide the W phase, and the additional winding arrangement 210 is only exemplarily designed to guide the V phase. Each winding arrangement 200, 205, 210 is wound in the same way, so the following description of the winding arrangement 200 also applies in a similar way to the further winding arrangement 205 and the additional winding arrangement 210.
[0030] The winding arrangement 200 comprises a first partial winding A, which can also be referred to as a branch or a branch, and a second partial winding B. In this embodiment, both partial windings A, B correspond to the embodiments of the windings described in the previous figures and are wound, for example, parallel to one another in a total of four winding layers L1, L2, L3, L4. The winding layers L1, L2, L3, L4 comprise a radially outermost outer layer L1 and an intermediate layer L2 arranged adjacent to the outer layer L1. Opposite the outer layer L1, adjacent to the intermediate layer L1, a further intermediate layer L3 is arranged. And adjacent to the further intermediate layer L3, the radially innermost inner layer L4 of the winding layers is arranged.
[0031] Each partial winding A, B of the winding device 200 includes a plurality of partial strands, which are only exemplarily designed as hairpins and interconnected with each other on the torsion side of the winding. To this end, a first subset of the partial strands of the first partial winding A is guided through the inner layer L4 and another intermediate layer L3, and is interconnected with each other, for example, across layers. A second subset of the partial strands of the first partial winding A corresponding to the first subset is guided through the intermediate layer L2 and the outer layer L1, and is also exemplarily interconnected with each other across layers. A third subset of the partial strands of the first partial winding A corresponding to the first subset and the second subset is guided through the outer layer L1 and the intermediate layer L2 and is interconnected with each other across layers, and a fourth subset of the partial strands of the first partial winding A corresponding to the first subset, the second subset and the third subset is guided through another intermediate layer L3 and the inner layer L4 and is interconnected with each other across layers. In one embodiment, these subsets correspond to one quarter of the total number of partial strands of the first partial winding A, respectively.
[0032] In this exemplary embodiment, the partial winding B of the winding arrangement 200 is wound in parallel with the partial winding A with the same number of partial strands and in accordance with the same winding pattern.
[0033] By the described winding type, in particular the winding layers L1 and L2 and the winding layers L3 and L4 arranged adjacent to each other are closely interwoven with each other, so that these pairs can also be referred to as loops. The interconnection of a part of the strands of the first subset with a part of the strands of the second subset, or the interconnection of a part of the strands of the third subset with a part of the strands of the fourth subset, spans the intermediate layer L2 and the further intermediate layer L3, and can therefore also be referred to as a loop jump. In the assembly presented here, such loop jumps occur as few times as possible in each branch, so that the entire winding arrangement 200 and therewith also a further winding arrangement 205 guided in the same manner and the additional winding arrangement 210 can be manufactured with low operating costs and save material and installation space.
[0034] Figure 3A schematic partial view of an assembly 100 with a winding 110 according to an embodiment is shown. The assembly 100 shown here corresponds to or is similar to the assembly described in the previous figures and is shown from the torsion side in the figures shown here. The assembly 100 comprises an annular lamination stack 115 having a plurality of grooves 300 extending axially through the lamination stack 115, which are used to accommodate partial strands of the winding 110 in a plurality of radially adjacently arranged winding layers. In this embodiment, the winding 110 comprises four winding layers, wherein each winding layer corresponds to the radial position of the partial strands of the winding 110 in the grooves 300. The partial strands of the winding 110 are interconnected with each other across the winding layers adjacent to each other on the torsion side shown here of the assembly 100. The torsion angle is thereby reduced, at which the partial strands that need to be bent toward each other are oriented.
[0035] Figure 4 As shown in the previous Figure 2 4. A table showing an embodiment of a winding scheme 400 of a winding arrangement described in the drawings. The winding arrangement comprises a first partial winding A and a second partial winding B. Here, both partial windings A, B correspond to the windings described previously in the drawings. Figure 1 and attached Figure 3 The winding described in .
[0036] The winding scheme 400 shown here is designed, for example, for an assembly with a laminated core having, for example, 72 grooves and a number of holes of 3 for accommodating a total of three windings, in which, for example, phases U, W and V can be guided. The positions 1 to 72 of the grooves along the circumference of the laminated core are given in the top three rows of the table, wherein the top row corresponds to a variant of the winding arrangement for guiding the U phase, the row arranged below it corresponds to a variant of the winding arrangement for guiding the W phase, and the row arranged below it corresponds to a variant of the winding arrangement for guiding the V phase. The positions of the corresponding connections of the individual phases are given in the fourth row.
[0037] The four rows shown below the position markings correspond, for example, to the four winding layers of the winding. Here, the top row corresponds to the radially outermost outer layer L1 of the winding. The intermediate layer L2 is arranged below the outer layer L1 in the table shown here and is to be understood as a winding layer arranged radially adjacent to the outer layer L1 in the laminated stack. Similarly, the row arranged below it represents another intermediate layer L3 arranged radially adjacent to the second winding layer L2. Similarly, the row arranged below it represents the inner layer L4 of the winding, which is arranged radially adjacent to another intermediate layer L3 and is radially the innermost. In the bottom row of the winding scheme 400, the input and output ends of some of the strands of the winding are indicated starting from the torsion side of the winding.
[0038] In the exemplary embodiment shown here, the winding concept 400 is shown merely by way of example with reference to a winding arrangement for conducting a U phase.
[0039] In this embodiment, the winding arrangement comprises two parallel partial windings A, B, each of which has twenty-four interconnected partial strands. The partial windings A, B can also be referred to as branches or branches of the winding arrangement and are wound parallel to each other. Therefore, the following description of the first partial winding A also applies similarly to the second partial winding B, wherein the corresponding partial strands of the partial windings A, B are arranged at intervals of one groove to three grooves from each other along the circumference of the laminated core.
[0040] In this embodiment, the first partial winding A includes, for example, twenty-four partial strands in total. The first partial strand A1 of the first subset of these partial strands is interconnected with the external connector U1. In the present embodiment, the first partial strand A1 enters the inner layer L4 of the winding layer at the first input position 47 (see the first row of the winding scheme 400), and is guided through the lamination stack of the assembly from there, and extends out again in another intermediate layer L3 arranged adjacent to the inner layer L4 at the first output position 61. Here, the first input position 47 and the first output position 61 are, for example, arranged to be spaced fourteen grooves apart from each other. The first partial strand A1 of the first subset is interconnected with the second partial strand A2 from, for example, the first output position 61. Similar to the first partial strand A1, the second partial strand A2 enters at the second input position 1 in the inner layer L4, and extends out at the second output position 11 in another intermediate layer L3. Therefore, in the present embodiment, the first partial strand A1 and the second partial strand A2 are interconnected with each other across layers with a spacing of 12 grooves, and the resulting torsion step lengths are 6 grooves respectively. The second partial strand A2 is interconnected, for example, with the third partial strand A3 of the first subset, wherein the third partial strand A3 extends from the inner layer L4 to the further middle layer L3 in the same manner as the first and second partial strands A1, A2. According to this pattern, the first subset of the partial strands of the partial winding A is guided through the inner layer L4 and the further middle layer L3 and is interconnected with each other across the layers. In one embodiment, the first subset of the partial strands corresponds to one quarter of the total number of the partial strands of the partial winding A.
[0041] In this embodiment, the last partial strand A6 of the first subset is interconnected with the first partial strand A7 of the second subset. To this end, the last partial strand A6 of the first subset extends out at the sixth output position 35 in the other intermediate layer L3 and is interconnected, for example, across layers, with the first partial strand A7 of the second subset, wherein in this embodiment, the first partial strand A7 enters at the seventh input position 45, which is ten grooves apart, in the intermediate layer L2. Such interconnection between the intermediate layers L3, L2 can also be referred to as ring hopping.
[0042] The first partial strand A7 of the second subset of partial strands enters at the seventh input position 45 in the middle layer L2 and extends at the seventh output position 59 in the outer layer L1. Starting from the seventh output position 59, the first partial strand A7 of the second subset is interconnected with the second partial strand A8 of the second subset, wherein the second partial strand A8 of the second subset enters in the middle layer L2 in a manner similar to the first partial strand A7 and extends from the outer layer L1. In the same manner, the second partial strand A8 of the second subset is interconnected, for example, with the third partial strand A9 of the second subset, wherein the third partial strand A9 extends from the middle layer L2 to the outer layer L1 in the same manner as the first and second partial strands A7, A8. According to this mode, the second subset of partial strands of the partial winding A is guided through the middle layer L2 and the outer layer L1, and is interconnected to each other across layers, respectively. In one embodiment, the second subset of partial strands corresponds to one quarter of the total number of partial strands of the partial winding A.
[0043] In this embodiment, the first and second subsets of partial strands of partial winding A are wound along a first main direction H1 of the winding. Merely exemplary, the first main direction H1 corresponds to a counterclockwise winding direction when viewing the assembly from the torsion side.
[0044] In this embodiment, the last partial strand A12 of the second subset is interconnected with the first partial strand A13 of the third subset. To this end, in this embodiment, the last partial strand A12 of the second subset is interconnected with the first partial strand a13 of the third subset starting from the twelfth output position 33 in the outer layer L1, wherein the first partial strand a13 enters the outer layer L1 at the thirteenth input position 22 circumferentially spaced from the twelfth output position 33.
[0045] In the present embodiment, the first partial strand a13 of the third subset extends from the thirteenth input position 22 to the thirteenth output position 12 in the middle layer L2 and is interconnected with the second partial strand a14 of the third subset, which enters the outer layer L1 at the fourteenth input position 72 and extends at the fourteenth output position 58 in the middle layer L2. The second partial strand a14 of the third subset is interconnected, for example, with the third partial strand a15 of the third subset, which also extends from the outer layer L1 to the middle layer L2. The partial strands of the third subset (which, for example, correspond to one quarter of the total number of partial strands in the partial winding A) extend in parallel with the partial strands of the second subset in the outer layer L1 and the middle layer L2, but are wound along the second main direction H2 of the winding opposite to the first main direction H1.
[0046] In this embodiment, the last partial strand a18 of the third subset is interconnected with the first partial strand a19 of the fourth subset. This interconnection is similar to the interconnection between the last partial strand A6 of the first subset and the first partial strand A7 of the second subset, and is designed to be a loop jump from the middle layer L2 to another middle layer L3. Subsequently, the first partial strand a19 of the fourth subset, for example, extends from another middle layer L3 to the inner layer L4 along the second main direction H2, and is interconnected with the second partial strand a20 of the fourth subset, which also extends from another middle layer L3 to the inner layer L4. The remaining partial strands in the fourth subset (in this embodiment, which is equivalent to one quarter of the total number of partial strands of the partial winding A) are also guided through another middle layer L3 and the inner layer L4 in parallel to each other along the second main direction H2, and are interconnected with each other, for example, across layers. In this embodiment, the last partial strand a24 of the fourth subset is interconnected with another external connector U2.
[0047] Figure 5 FIG. 4 is a schematic diagram of a winding scheme 400 according to an embodiment. The winding scheme 400 shown here is similar to the winding scheme 400 shown in the previous Figure 4 The winding scheme described in is corresponding or similar. In the figure shown here, for example, a winding of a first partial winding A is shown, wherein the previously described inner layer and another intermediate layer arranged adjacent thereto are shown in the lower half of the figure, and the previously described intermediate layer and the outer layer are shown in the upper half of the figure.
[0048] In the illustration shown here, purely by way of example, in addition to the arrangement and interconnection of the partial strands of the partial winding A, the corresponding coil widths of the individual partial strands, which are designed, for example, as hairpins, are also given. Thus, purely by way of example, the first partial strand A1 of the first subset has a coil width of fourteen grooves, the second partial strand A2 of the first subset has a coil width of ten grooves, and the third partial strand A3 of the first subset has a coil width of fourteen grooves in turn. Following this pattern, all the remaining partial strands of the partial winding A also alternately have coil widths of ten grooves and fourteen grooves.
[0049] In this embodiment, the last partial strand A6 of the first subset is interconnected with the first partial strand A7 of the second subset, whereby a loop jump occurs from another intermediate layer shown in the lower half of the accompanying drawings shown here to the intermediate layer shown in the upper part of the accompanying drawings shown here. A similar loop jump is produced by interconnecting the last partial strand a18 of the third subset with the first partial strand a19 of the fourth subset, wherein the partial strands a18, a19 are wound back from the intermediate layer to the other intermediate layer in opposite directions this time. Each loop jump of each branch of the winding device occurs only in one additional layer so that the pitch is achieved without great expense. Thus, the winding scheme 400 has good manufacturability and has a favorable installation space requirement. The cost for additional interconnecting elements is saved.
[0050] Figure 6 A schematic diagram of a first portion of strands A1 according to one embodiment is shown. The first portion of strands A1 shown here corresponds to or is similar to the first portion of strands A1 shown in the previous FIG. Figure 4 and 5 , and is exemplarily used for all partial strands of the winding as described in the previous figures. In this embodiment, the first partial strand A1 is formed as a flat wire made of copper material, which is used to conduct electrical energy and has a hairpin-like shape. The first partial strand A1 includes an input section 600 and an output section 602, which are used to pass through the grooves of the lamination stack of the assembly. The input section and the output section are connected, for example, by a connecting section 604.
[0051] Figure 7 A schematic diagram of a motor vehicle 700 according to one embodiment is shown. The motor vehicle has an electric axle drive with a shaft drive having a motor drive, for example, with the aid of a previously described attachment. Figure 1 The motor 105 described. The electrical energy for running the motor 105 is provided by an energy supply mechanism 702 (e.g., a battery). For example, direct current is provided by the energy supply mechanism 702, and a converter 704 of a transmission mechanism is used to convert the direct current into alternating current, such as three-phase alternating current, and to provide it to the motor 105. Therefore, the motor 105 can be an electric motor that works with a three-phase alternating voltage. The shaft driven by the motor 105 is directly or using a transmission mechanism 706 and is connected to at least one wheel 708 of the motor vehicle 700. Therefore, the motor vehicle 700 can move forward under the drive of the motor 105. According to one embodiment, the electric shaft drive includes a housing, and the converter 704, the motor 105 and the transmission mechanism 706 are arranged in the housing in an integrated manner.
[0052] List of Reference Numerals
[0053] 100 components
[0054] 105 Motor
[0055] 110 Winding
[0056] 115 lamination pack
[0057] 117 crown side
[0058] 118 twist side
[0059] 200 Winding Device
[0060] 205 Another winding device
[0061] 210 Additional winding device
[0062] A. The first part of the winding
[0063] B The second winding
[0064] L1 Outer Layer
[0065] L2 middle layer
[0066] L3 Another intermediate layer
[0067] L4 inner layer
[0068] 300 grooves
[0069] 400 winding scheme
[0070] U1 external connector
[0071] U2 Another external connector
[0072] A1 The first part of the first subset of strands
[0073] A2 The second part of the first subset of strands
[0074] A3 The third strand of the first subset
[0075] A6 The last strand of the first subset
[0076] A7 The first part of the second subset of strands
[0077] A8 The second part of the second subset of strands
[0078] A9 The third strand of the second subset
[0079] A12 The last part of the second subset
[0080] a13 The first part of the third subset of strands
[0081] a14 The second part of the third subset of strands
[0082] a15 The third strand of the third subset
[0083] a16 part strand
[0084] a18 The last part of the third subset
[0085] a19 The first part of the fourth subset
[0086] a20 The second part of the fourth subset of strands
[0087] The twenty-first strand in the A21 strand
[0088] a24 The last part of the fourth subset
[0089] 1 Second input position
[0090] 12Thirteenth output position
[0091] 22Thirteenth input position
[0092] 33 12th output position
[0093] 35 Sixth output position
[0094] 45 Seventh input position
[0095] 47 First input position
[0096] 58 Fourteenth output position
[0097] 59 Seventh output position
[0098] 61 First output position
[0099] 72 Fourteenth input position
[0100] The first main direction of the H1 winding
[0101] Second main direction of H2 winding
[0102] 600 Input Section
[0103] 602 output section
[0104] 604 connection section
[0105] 700 Motor Vehicles
[0106] 702 Energy Supply Mechanism
[0107] 704 Converter
[0108] 706 transmission mechanism
[0109] 708 wheels.
Claims
1. A winding (110) of an assembly (100) for an electric machine (105), wherein: The assembly (100) comprises an annular lamination stack (115) having a plurality of grooves (300) extending axially through the lamination stack (115), the grooves being used to accommodate partial strands of the winding (110) in a plurality of radially adjacent winding layers (L1, L2, L3, L4), wherein the winding layers (L1, L2, L3, L4) comprise at least one radially outermost outer layer (L1) and a radially innermost inner layer (L4), and at least one intermediate layer (L2) arranged adjacent to the outer layer (L1) and another intermediate layer (L3) arranged adjacent to the inner layer (L4), wherein , a first subset of the partial strands of the winding (110) is guided through the inner layer (L4) and the other middle layer (L3), and a second subset of the partial strands corresponding to the first subset is guided through the middle layer (L2) and the outer layer (L1), and a third subset of the partial strands corresponding to the first subset and the second subset is guided through the outer layer (L1) and the middle layer (L2), and a fourth subset of the partial strands corresponding to the first subset, the second subset and the third subset is guided through the other middle layer (L3) and the inner layer (L4).
2. The winding (110) according to claim 1, wherein: The first and second subsets of the partial strands are wound along a first main direction (H1) of the winding (110), and the third and fourth subsets of the partial strands are wound along a second main direction (H2) of the winding (110) opposite to the first main direction (H1).
3. The winding (110) according to any one of the preceding claims, wherein The subsets of the partial strands respectively correspond to one quarter of the total number of the partial strands.
4. The winding (110) according to one of the preceding claims, wherein The first partial strand (A1) of the first subset is interconnected with an external connector (U1), and the last partial strand (A6) of the first subset is interconnected with the first partial strand (A7) of the second subset, and the last partial strand (A12) of the second subset is interconnected with the first partial strand (a13) of the third subset, and the last partial strand (a18) of the third subset is interconnected with the first partial strand (a19) of the fourth subset, and the last partial strand (a24) of the fourth subset is interconnected with another external connector (U2).
5. The winding (110) according to claim 4, wherein: The other partial strands of the first subset are interconnected with each other across layers, and / or the other partial strands of the second subset are interconnected with each other across layers, and / or the other partial strands of the third subset are interconnected with each other across layers, and / or the other partial strands of the fourth subset are interconnected with each other across layers.
6. The winding (110) according to any one of the preceding claims, wherein The portion of strands (A12) of the second subset are interconnected with the portion of strands (a13) of the third subset within the outer layer (L1).
7. A winding arrangement (200), the winding arrangement comprising at least a first winding section (A) and a second winding section (B), wherein: The first partial winding (A) and / or the second partial winding (B) corresponds to a winding (110) according to any one of the preceding claims.
8. A component (100) for an electric machine (105), the component having a winding (110) according to any one of the preceding claims 1 to 6 and having an annular laminated core (115), the laminated core having a plurality of grooves (300) extending axially through the laminated core (115), the grooves being used to accommodate part of the strands of the winding (110) in a plurality of radially adjacent winding layers (L1, L2, L3, L4).
9. An electric machine (105) having an assembly (100) according to claim 8, wherein: The component (100) is designed as a stator or a rotor of the electric machine (105) and comprises three windings (110) according to any one of claims 1 to 6.
10. An electric axle drive (700) for a motor vehicle, comprising at least one electric motor (105), a transmission (706) and a converter (704), characterized in that: The electric machine (105) is designed according to claim 9.
11. A motor vehicle (700) comprising an electric machine (105) according to claim 9 and / or an electric axle drive according to claim 10.