Stator for an electric machine having pins

Abstract

To provide a stator with windings made from a plurality of pins, which is easy to manufacture.SOLUTION: A stator for an electric machine includes a winding made from a plurality of pins which is arranged on concentric circles at different distances to a stator center in slots 51-58, 71-78, 91-98 in the stator, each concentric circle forming a layer (L1, L2, L3, L4). Four pins in different layers are serially connected to one another and form the winding. When n is an integer, a first pin of the winding is located in the 4n-3 layer L1 in a first slot 53, a second pin of the winding is located in the 4n-2 layer L2 in a second slot 94, a third pin of the winding is located in the 4n layer L4 in the first slot 53, and a fourth pin of the winding is located in the 4n-1 layer L3 in the second slot 94.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a stator for an electric machine having pins, in particular a stator for an electric motor. [Background technology]

[0002] Electric motors are generally known and are increasingly being used to drive automobiles. Electric machines consist of a stator and a rotor.

[0003] The stator includes a number of slots in which the windings are guided. The windings may be formed from insulated copper rods as so-called pins. The rotor is arranged in the stator and is connected to the rotor shaft.

[0004] Such a pin, U-pin or hairpin motor is known, for example, from US 9,136,738 B2. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Pat. No. 9,136,738 Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a stator having windings made from multiple pins which is easy to manufacture. [Means for solving the problem]

[0007] According to the invention, a stator for an electric machine comprises a number of pins arranged in slots of the stator on concentric circles at different distances to the stator center, each concentric circle forming a layer. In each case, four pins of different layers are connected in series with each other to form a winding, a first pin of the winding is arranged in a 4n-3 layer in a first slot, where n is an integer and "4n-3 layer" is "(4n-3)th layer", and so forth. A second pin of the winding is arranged in a 4n-2 layer in a second slot, the second slot having a first radial distance in a first circumferential direction of the stator to the first slot. A third pin of the winding is arranged in a 4n layer in the first slot, and a fourth pin of the winding is arranged in a 4n-1 layer in a second slot, the fourth slot being arranged adjacent to the second slot.

[0008] The layers may be numbered in ascending order from the outside towards the center of the stator. The integers do not include zero.

[0009] A stator with a winding according to the invention can be easily manufactured, generates an efficient electromagnetic field with lower iron or magnetic losses, and makes better use of the steel sheet stack. The connection type establishes an electrically conductive connection between the pins in the slots. The connection type can be welding of a conductor to the pin or the pin can be pre-configured as a double pin, a so-called U-pin, and thus already establishes a connection upon insertion into the stator. Furthermore, joining of the ends of the pins bent towards each other also represents a connection type.

[0010] Preferably, the stator may have a first end face and a second end face, the first pin and the second pin may be connected to each other at the second end face by a first connection type, the second pin and a third pin may be connected to each other at the first end face by a second connection type, and the third pin and a fourth pin may be connected to each other at the second end face by a third connection type, the first connection type, the second connection type, and the third connection type being different from each other.

[0011] The different connection types allow for improved manufacturing. The alternating connection types on the different end faces allow for efficient formation of windings around the stator teeth that are located between the slots. The different connection types allow for improved manufacturing.

[0012] Even if the connection types are on the same end face of the stator, the connection types may be different due to different bending directions of the pin feet towards the inside or outside of the stator.

[0013] It is also possible to use a combination of the above mentioned connection types on different or the same end faces of the stator. There is one identical connection type on the same end face and several different connection types on different end faces of the stator, which allows for simple and fast production. For example, the connection is established by pre-bent pins, so-called double pins or U-pins, on one end face, which are welded to each other individually or in each case one side of the double pin is welded to the other end face of the stator. The welded points may contact the legs of the pins or double pins.

[0014] Preferably, the starting pin may be a first end pin, where the first end pin is configured as a single pin, for example an I-pin.

[0015] In one embodiment of the invention, the stator may have at least two windings, with at least the fourth pin of the second slot connected to a fifth pin of the 4n-3 layer in the third slot by a fourth connection type.

[0016] The rotating magnetic field produced by such windings has less disturbance harmonics and therefore less torque ripple, less torque fluctuations and also better NVH characteristics.

[0017] Preferably, a second distance greater than the first distance may exist between the second slot and the third slot.

[0018] A stator with windings distributed in slots with different distances has lower AC ohmic losses and has a lower degree of saturation.

[0019] In another embodiment of the present invention, the stator may have multiple windings that extend around the entire circumference of the stator to form partial coils.

[0020] In this way, the windings have a symmetry that produces a uniform rotating magnetic field.

[0021] More preferably, one pin each from two partial coils may be connected to each other by the fifth or sixth connection type to form a coil. These pins may be so-called end pins, representing the ends of the partial coils.

[0022] In one embodiment of the invention, the end pins at the beginning or end of the coil may be configured as single pins.

[0023] Preferably, the four pins of one coil may fully occupy the four slots.

[0024] More preferably, the partial coils may form six coils, which may be assigned to three phases, in such a way that in each case two coils assigned to the same phase are arranged in three adjacent slots, whereby in each case two different layers in the outer two slots are occupied by pins from other phases.

[0025] In one preferred embodiment of the invention, the input and the output of one of at least two coils in each case may be connected to each other, so that two coils may be switched simultaneously and, in particular, assigned to one phase.

[0026] More preferably, one input from at least two coils may be connected to each other by a seventh connection type.

[0027] A seventh connection type may be established by a conductor or conductive ring applied to the pin.

[0028] The two coils may be connected in parallel and may be powered in phase, the parallel connection being achieved by connecting the first and fifth endpin pair or the fourth and eighth endpin pair.

[0029] Furthermore, the two phases may each have nearly identical current and voltage curves, so a six-phase inverter may control only a three-phase motor. Inverters using this arrangement allow for current splitting of the switching elements.

[0030] Thus, two coils in three adjacent slots may be switched simultaneously and powered by one phase, resulting in the stator having windings for a three-phase electric machine.

[0031] According to the invention, a vehicle is equipped with an electric machine having a stator according to one of the preferred embodiments. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 shows the stator. [Diagram 2] FIG. 2 shows a stator with eight slots and four layers. [Diagram 3] FIG. 3 shows the winding scheme of the first partial coil. [Figure 4] FIG. 4 shows the winding scheme of the second partial coil. [Diagram 5] FIG. 5 shows a stator having a first partial coil and a second partial coil, which are connected to each other and thus have a first coil. [Figure 6] FIG. 6 shows a winding method for another partial coil. [Figure 7] FIG. 7 shows another winding method for the partial coil. [Figure 8] FIG. 8 shows two other partial coils and their connection to each other, thus forming a stator with a second coil. [Figure 9] FIG. 9 shows a stator with two coils, each made up of two partial coils. [Figure 10] FIG. 10 shows a stator with two other coils. [Figure 11] FIG. 11 shows a stator with two other coils. [Figure 12] FIG. 12 shows a stator with six coils. [Figure 13] FIG. 13 is a winding diagram of the first and second coils. [Figure 14] FIG. 14 shows a vehicle equipped with an electric machine, in particular an electric motor, having a stator and an inverter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] FIG. 1 shows a stator 1 with a number of slots 5 in which the pins 2, 3 are guided. The stator 1 has a first end face 7 and an oppositely extending second end face 9. On the first end face 7, the inputs 81, 87, 101, 107, 111, 117 and outputs 83, 85, 103, 105, 113, 115 of the partial coils are shown for connecting the pins to an energy source for operating the electric machine. Of course, a rotor is additionally required for operating the electric machine. The connecting pins are arranged closely adjacent to each other, allowing short connection lines.

[0034] FIG. 2 shows a stator 1 in which the slots and pins are arranged in four layers, where only eight slots 51, 52, 53, 54, 55, 56, 57, 58 are depicted. The pins 21, 23 are arranged in the slots 51, 52, 53, 54, 55, 56, 57, 58. The pins 21, 23 are arranged adjacent to one another in one slot. In the example of FIG. 2, four pins are arranged adjacent to one another in one slot. The four pins in the four slots are thus arranged on different concentric circles L1, L2, L3, L4 around the stator center M, thus forming individual layers. Between every two slots, a standard distance 11 is provided. This standard distance 11 is the same between all slots shown in FIG. 2.

[0035] Figure 3 shows the stator 1 from figure 2. The pins are furthermore arranged concentrically and therefore in layers, which are not shown here for a better depiction. Figure 3 illustrates which pins are connected in series with each other. The pin 21, which is an end pin and also has an input 81, is arranged in layer L4 in slot 51. This first end pin is, for example, a single pin and is configured as an I-pin.

[0036] Pin 21 is connected by a third connection type 63, drawn with a solid line, to pin 27 in slot 92. Pin 27 is located on layer L3. Pin 22 is connected by a fourth connection type 64, drawn with a short dashed line, to a first pin 25 in the first slot 53. First pin 25 is located on layer L1.

[0037] The first pin 25 is connected to the second pin 24 via a first connection type 61 depicted by a dotted line. The second pin 24 is located in a second slot 94. A first distance 13, which is one slot shorter than the standard distance 11 from FIG. 2, is provided between the first slot 53 and the second slot 94. The second pin 24 is located on layer L2.

[0038] The second pin 24 is connected to the third pin 23 of the first slot 53 by a second connection type 62, depicted by a dashed line. The third pin 23 is located on layer L4. Thus, in the first slot 53, space remains for two other pins between the first pin 25 and the third pin 23.

[0039] The third pin 23 is connected to the fourth pin 22 in the second slot 94 by a third connection type 63 drawn with a solid line. The fourth pin 22 is located on layer L3. The second pin 24 and the fourth pin 22 are located in the center of the slot, and there is still space for two other pins on the inner layer L4 and outer layer L1 of the stator.

[0040] A first winding 41 is formed by connecting the first, second, third and fourth pins.

[0041] The fourth pin 22 is connected to the fifth pin 26 of the third slot 55 via a fourth connection type 64. Between the second slot 94 and the third slot 55, a second distance 19 is provided, which is one slot shorter than the standard distance 11. The fifth pin 26 is located in layer L1. At the fifth pin 26, the series connection of consecutive pins in the stator begins again, where the fifth pin 26 is similar to the first pin 25 with the slots offset by 90 degrees.

[0042] The series connection of the fifth pin 26 to other pins in another slot 96 forms the second winding 42. The first, second and third connection types 61, 62, 63 between these pins are identical to the first, second and third connection types 61, 62, 63, respectively, of the pins of the first winding 41.

[0043] The two windings 41, 42 are connected by a fourth connection type 64. By continuation of the series connection, a third winding 43 is formed in two other slots 57, 98. Each of the windings 41, 42, 43 is connected by a fourth connection type 64. The fourth connection type 64 between each of the windings is thus identical. The first, second and third connection types 61, 62, 63 between the pins of the winding 43 are also identical to the first, second and third connection types 61, 62, 63 of the first and second windings 41, 42.

[0044] The fourth winding 44 is also connected to the third winding 43 via a fourth connection type 64, but this winding lacks a connection of the second connection type. Pin 28 represents the second end pin and winding 44 is formed according to Figure 5 and described therein.

[0045] The four windings 41, 42, 43, 44 form a first partial coil through one circuit in a clockwise direction around the stator 1. The first pin 21 has an input 81 for connection to an energy source. The partial coil terminates at the second end pin 28 of the winding 44.

[0046] FIG. 4 shows the stator 1, where eight slots 71, 73, 75, 77, 92, 94, 96, 98 are shown.

[0047] Pins 31, 32, 33, 34, 35, 38 are connected in the same manner as pins 22, 23, 24, 25, 26, 28 of Fig. 3. The types of connections are also the same as in Fig. 3 and are clearly represented by the same reference numbers. Windings 45, 46, 47, 48 are formed in the same manner as pins 22, 23, 24, 25, 26, 28 of Fig. 3.

[0048] The four windings 45, 46, 47, 48 form a second partial coil through one circuit in a counterclockwise direction around the stator 1. The partial coil starts at the third end pin 31. The partial coil ends at the last pin 38 of the winding 48, which thus becomes the fourth end pin. The fourth end pin 38 further has an output 83 for connection to an energy source. The input and output may of course be reversed.

[0049] FIG. 5 shows the pin assignments according to the first and second partial coils from FIGS. 3 and 4, which are represented by black squares. In the figures, identical reference symbols designate identical pins, slots and connections. The second end pin 28 of the fourth winding 44 of the first partial coil of layer L2, slot 92, and the third end pin 31 of the first winding 45 of the second partial coil of layer L3, slot 71, are connected by a fifth connection type 65. This connection forms the fourth winding 44 mentioned in the description of FIG. 3. The fifth connection type 65 bridges the second distance 19.

[0050] In this way, the two partial coils form, after two radial circuits in different respective directions around the stator, a first coil 201 having an input 81 and an output 83. The illustrated third distance 17 is the length of one slot.

[0051] The pins of the coil 201 occupy all layers in the four slots 92, 94, 96, and 98. These four slots 92, 94, 96, and 98 are each rotated 90 degrees and have twice the nominal distance, which is the sum of the first distance 13 and the second distance 19.

[0052] FIG. 6 shows the stator 1. The pins are furthermore arranged on concentric circles, which are therefore layers not shown for a better depiction. It is depicted which pins are connected in series with each other and form a first partial coil of the second coil 202, depicted with squares in white squares. A fifth end pin 21a is arranged in a slot 91 of the layer L4. This fifth end pin 21a is connected to a pin 27a in a slot 72 by a third connection type 63 depicted with a solid line. The pin 27a is arranged in the layer L3. The pin 26a is connected to a first pin 25a in the layer L1 in a first slot 93 by a fourth connection type 64 depicted with a short dashed line.

[0053] The first pin 25a is connected to the second pin 24a via a first connection type 61 depicted by a dotted line. The second pin 24a is located in the second slot 74. Between the first slot 93 and the second slot 74, a first distance 13 is provided, which is one slot shorter than the standard distance 11 as viewed in FIG. 2. The second pin 24a is located in layer L2.

[0054] The second pin 24a is connected to the third pin 23a of the first slot 93 by a second connection type 62, depicted in dashed lines. The third pin 23a is on layer L4. Thus, there is still space for two other pins in the first slot 93 between the first pin 25a and the third pin 23a.

[0055] The third pin 23a is connected to the fourth pin 22a in the second slot 74 by a third connection type 63 drawn with a solid line. The fourth pin 22a is located on layer L3. The second pin 24a and the fourth pin 22a are centered in the second slot 74 such that there is still space for the other two pins on the stator inner layer L4 and the stator outer layer L1.

[0056] A first winding 41 is formed by connecting the first, second, third and fourth pins.

[0057] The fourth pin 22a is connected to the fifth pin 26a in the third slot 95 via a fourth connection type 64. Between the second slot 74 and the third slot 95, a second distance 19 is provided, which is one slot longer than the standard distance 11. The fifth pin 26a is located in layer L1. With the fifth pin 26a, the series connection of consecutive pins in the stator begins again, where the fifth pin 26a is similar to the first pin 25a, with the slots offset by 90 degrees.

[0058] The series connection of the fifth pin 26a to other pins in another slot 76 forms the second winding 42. The first, second and third connection types 61, 62, 63 between these pins are identical to the first, second and third connection types 61, 62, 63, respectively, of the pins of the first winding 41.

[0059] The four windings 41, 42 are connected by a fourth connection type 64. Continuing the series connection, a third winding 43 is formed in two other slots 97, 78. Each of the windings 41, 42, 43 is connected by a fourth connection type 64. The fourth connection type 64 between each of the windings is thus identical. The first, second and third connection types 61, 62, 63 between the pins of the winding 43 are also identical to the first, second and third connection types 61, 62, 63 of the first and second windings 41, 42.

[0060] The fourth winding 44 is also connected to the third winding 43 via a fourth connection type 64, but this winding lacks a connection of the second connection type. Pin 28a represents the sixth end pin and winding 44 is produced according to and described in FIG. 8.

[0061] The four windings 41, 42, 43, 44 form a first partial coil through one circuit in a clockwise direction around the stator 1. The fifth end pin 21a has an input 87 for connection to an energy source. The partial coil terminates at the sixth end pin 28a of the winding 44.

[0062] FIG. 7 shows a stator 1 in which eight slots 52, 54, 56, 58, 91, 93, 95, 97 are shown.

[0063] The pins are further arranged on concentric circles, which are therefore not shown for better depiction. Squares within white squares depict which pins are connected in series with each other and form the second partial coil of the second coil 202.

[0064] Pins 31a, 32a, 33a, 34a, 35a, 38a are connected in the same manner as pins 22a, 23a, 24a, 25a, 26a, 28a in Fig. 6. The types of connections are also the same as in Fig. 6 and are clearly represented by the same reference numerals. Windings 45, 46, 47, 48 are formed in the same manner as described in Fig. 6 and are connected to each other by a fourth connection type 64.

[0065] The four windings 45, 46, 47, 48 form a second partial coil through one circuit counterclockwise around the stator 1. The partial coil starts at the seventh end pin 31a. The partial coil ends at the pin 38a of the winding 48. The last pin 38a of the winding 48 thus represents the eighth end pin. The eighth end pin 38a further has an output 85 for connection to an energy source. The input and output may of course be reversed.

[0066] Figure 8 shows the pin assignments according to the first and second partial coils from Figures 6 and 7, which are depicted as squares within white squares, in which identical reference numbers indicate identical pins, slots and connections.

[0067] The sixth end pin 28a of the fourth winding 44 of the first partial coil in the slot 72 of the layer L2 and the seventh end pin 31a of the first winding 45 of the second partial coil in the slot 91 of the layer L3 are connected using a sixth connection type 66. This connection forms the fourth winding 44 mentioned in the description of FIG. 6. The sixth connection type 66 bridges the first distance 13.

[0068] In this way, the two partial coils, after two radial circuits in different respective directions around the stator, form a second coil 202 having an input 87 and an output 85. The illustrated third distance 17 is the length of one slot.

[0069] The pins of the coil 202 occupy a full layer in four slots, each of which is rotated 90 degrees and has twice the nominal distance, i.e., the sum of the first distance 13 and the second distance 19.

[0070] FIG. 9 shows the pin assignment according to the first coil 201 from FIG. 5, which is depicted by black squares. In the figure, identical references indicate identical pins, slots and connections. Furthermore, the second coil from FIG. 8 is depicted by a square in a white square. The partial coils of the four coils are connected by a fifth connection type 65 (first coil) or a sixth connection type 66 (second coil). The fifth connection type 65 bridges the second distance 19. The sixth connection type 66 bridges the first distance 13. The pins of the four coils are respectively located on three adjacent coils. A third distance 15, which is two slots shorter than the standard distance 11, is located between the outer slots of each of the three adjacent slots.

[0071] Thus, two parallel coils, each consisting of two partial coils, are shown. The inputs and outputs of the coils are shown as well. The input 81 of the first coil is located in slot 51 and the output 83 is located in slot 92. The input 87 of the second coil is located in slot 91 and the output 85 is located in slot 52. The inputs and outputs of both coils are therefore located in adjacent slots.

[0072] Figure 10 shows the pin assignment according to the third coil as black squares with white dots and the pin assignment according to the fourth coil as white squares with black dots. This is the result of the winding scheme seen in figures 3, 4, 5, 6, 7 and 8, which in each case is offset counterclockwise by eight slots compared to the pins and connections of the partial coils shown there. The input 101 and output 103 of the third coil and the input 107 and output 105 of the fourth coil are likewise shown. The inputs and outputs of both coils are therefore arranged in adjacent slots.

[0073] Figure 11 shows the pin assignments according to the fifth coil as black squares with white crosses and the pin assignments according to the sixth coil as white squares with black crosses. This is the result of the winding scheme seen in figures 3, 4, 5, 6, 7 and 8, which is offset counterclockwise by four slots compared to the pins and connections of the partial coils shown there. The input 111 and output 113 of the fifth coil and the input 117 and output 115 of the sixth coil are also shown. The inputs and outputs of both coils therefore lie in the same slots, respectively.

[0074] Figure 12 shows the pin assignments with six coils as a combination from Figures 9, 10 and 11. As is especially evident from the location of inputs 81, 87, 101, 107, 111 and 117 and outputs 83, 85, 103, 105, 113 and 115, the coil interconnections can be made within 16 slots. In the example depicted stator with 48 slots, the input and output interconnections can be made within one third of the stator circumference. Based purely on inputs or outputs, 10 slots allow separate switching.

[0075] Figure 13 shows the winding scheme of two partial coils, a first coil 201 and a second coil 202. The consecutive "slot numbers" are not symbols. The symbols with arrows to the slots are identical to the preceding figures and allow comparison with these figures.

[0076] 14 shows a basic schematic diagram of an exemplary embodiment of a vehicle 403, for example a hybrid or electric vehicle. The vehicle comprises an electric machine 401, in particular an electric motor, with a stator 1 of the exemplary embodiment, for driving the vehicle 403. Furthermore, the vehicle 403 may comprise an inverter 405 supplying the electric machine 401 with an alternating current from a direct current source. [Explanation of symbols]

[0077] 1 Stator 2,3 pin 7 First end face 9 Second end face 11 Standard distance 13 First Distance 17 The third distance 21 First Endpin 28 Second Endpin 38 The Fourth Endpin 21a 5th Endpin 28a 6th Endpin 38a 8th Endpin 22~27,22a~27a pin 32~37,32a~37a pin 41~48 Windings 51~58 Slots 61 First Connection Type 62 Secondary Connection Type 63 Third Connection Type 64 The fourth connection type 65 The fifth connection type 66 The 6th Connection Type 71~78 Slots 81,87,101,107,111,117 Input 83,85,103,105,113,115 Output 91~98 Slots 201 First coil 202 Second Coil 401 Electrical Machinery 403 Vehicles 405 Inverter L1, L2, L3, L4 layers M Stator centre

Claims

1. A stator (1) for an electric machine (100), comprising: A plurality of pins (22, 23, 24, 25) are arranged on concentric circles at different distances to a stator center (M) in slots (51-58, 71-78, 91-98) of the stator (1), and each of the concentric circles forms a layer (L1, L2, L3, L4); in each case four pins (22, 23, 24, 25) of different layers (L1, L2, L3, L4) are connected in series with each other to form a winding (41); a first pin (25) of said winding (41) is arranged in a 4n-3 layer (L1) in a first slot (53), where n is an integer; a second pin (24) of the winding (41) is arranged in a 4n-2 layer (L2) in a second slot (94), the second slot (94) having a first radial distance (13) to the first slot (53) in a first circumferential direction of the stator (1); a third pin (23) of the winding (41) is disposed in the first slot (53) in a 4n layer (L4); A stator (1) for an electric machine (100), wherein a fourth pin (22) of the winding (41) is arranged in the second slot (94) in a 4n-1 layer (L3).

2. The stator (1) has a first end face (7) and a second end face (9), the first pin (25) and the second pin (24) are connected to each other at the second end face (9) by a first connection type (61); the second pin (24) and the third pin (23) are connected to each other at the first end face (7) by a second connection type (62); the third pin (23) and the fourth pin (22) are connected to each other at the second end face (9) by a third connection type (63); The stator (1) according to claim 1, wherein the first connection type, the second connection type and the third connection type are different from each other.

3. The stator (1) has at least two of the windings (41, 42, 43), 3. The stator (1) according to claim 1 or 2, wherein at least the fourth pin (22) in the second slot (94) is connected to a fifth pin (26) of a 4n-3 layer (L3) in a third slot (55) by a fourth connection type (64).

4. 4. The stator (1) of claim 3, wherein a second distance (19) is provided between the second slot (94) and the third slot (55), the second distance (19) being greater than the first distance (13).

5. 5. The stator (1) according to claim 3 or 4, wherein the stator (1) comprises a plurality of the windings (41, 42) which extend over the entire circumference of the stator (1) and form partial coils.

6. 6. The stator (1) according to claim 5, wherein in each case one said pin (28, 28a, 31, 31a) from two said partial coils is connected to one another by a fifth connection type (65) or a sixth connection type (66) to form a coil (201, 202).

7. 7. The stator (1) of claim 6, wherein the four pins of the coil fully occupy the four slots (92, 94, 96, 98).

8. The plurality of partial coils form six of the coils, 8. A stator (1) according to claim 7, wherein the six coils are assigned to three phases such that in each case two of the coils assigned to the same phase are located in three adjacent slots (51-58, 71-78, 91-98), whereby two different layers of the outer two slots (71-78, 91-98) are occupied by pins from the other phase in each case.

9. 9. A stator (1) according to claim 8, wherein in each case one output (81, 87, 101, 107, 111, 117) and one output (83, 103, 113, 85, 105, 115) of at least two of the coils (201, 202) are connected to each other, and the two coils (201, 202) are switched simultaneously, in particular assigned to one phase.

10. A vehicle (403) equipped with an electric machine (401) having a stator (1) according to any one of the preceding claims.

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