EP4029123A1

EP4029123A1 - Hairpin winding of a stator of an electric machine

Info

Publication number: EP4029123A1
Application number: EP20768570.2A
Authority: EP
Inventors: Boris Dotz
Original assignee: Valeo Siemens eAutomotive Germany GmbH
Current assignee: Valeo eAutomotive Germany GmbH
Priority date: 2019-09-11
Filing date: 2020-09-08
Publication date: 2022-07-20
Also published as: KR20220063210A; US20220376591A1; CN114667663A; JP7401657B2; JP2022547317A; DE102019124462A1; CN114667663B; WO2021048085A1; KR102691214B1

Abstract

The invention relates to a stator (1) for an electric machine (401), comprising a plurality of pins (21, 22, 23, 24, 31, 32, 33, 34) which are arranged in grooves (51, 52, 53, 54, 55, 56, 57, 58) in concentric circles at different distances from a stator centre point (M), with each concentric circle forming a layer (L1, L2, L3, L4), wherein four respective pins (21, 22, 23, 24, 25, 31, 32, 33, 34, 35) are connected in series with one another in different layers (L1, L2, L3, L4) and form a winding (41): a first pin (21) of the winding (41) is positioned in a first groove (51) in the 4n-1 layer (L3), wherein n is a natural number; a second pin (22) of the winding (41) is positioned in a second groove (52) in the 4n layer (L4), wherein the second groove (52) is at a first radial distance (71) from the first groove (51) in a first circumferential direction of the stator (1); a third pin (23) of the winding (41) is positioned in the first groove (51) in the 4n-3 layer (L2); and a fourth pin (24) of the winding (41) is positioned in the second groove (52) in the 4n-3 layer (L1).

Description

HAIRPIN WINDING A STATOR OF AN ELECTRIC MACHINE

The invention relates to a stator with pins for an electric machine, in particular an electric motor. State of the art

Electric machines are well known and are increasingly used as electric motors for driving vehicles. An electric machine consists of a stator and a rotor. The stator includes a variety of slots in which the

Windings are guided. The turns can be formed from insulated copper rods as so-called pins. The rotor is located in the stator and is connected to a rotor shaft. Such a pin, UPin or hairpin motor is known, for example, from US Pat. No. 9,136,738 B2.

Task and solution

The object of the present invention is to provide a stator with turns made of pins that is easy to manufacture.

According to the invention, the stator for an electrical machine comprises a plurality of pins which are arranged in slots on concentric circles at different distances from a stator center point and each concentric circle forms a layer, with four pins in different layers being connected in series with one another and one turn form, a first pin of the turn is located in a first groove in the 4n-1 layer, where n is a natural number, a second pin of the turn is located in a second Slot in the 4n layer, 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 turn is located in the first slot in the 4n-3 layer, a fourth pin of the turn is located in the second groove in the 4n-3 layer.

A stator with the winding according to the invention can be easily manufactured and generates an efficient electromagnetic field. The connection types create an electrically conductive connection between the pins in the grooves. The type of connection can be the welding of conductors to the pins, or the pins can already be designed as double pins, so-called Upins, and thereby establish a connection as soon as they are inserted into the stator. Furthermore, welding of end sections of pins that are bent towards one another also represents a type of connection.

The layers can be numbered in ascending order from the outside to the center of the stator.

The stator can preferably have a first and a second end face and the first and second pin can be connected to one another on the second end face by means of a first connection type, the second and third pin can be connected to one another on the first end face by means of a second connection type, the third and the fourth pin on the second end face can be connected to one another by means of a third type of connection, the first, second and third type of connection differing from one another.

The different types of connection enable improved production. An alternating position of the connection types on different end faces enables the efficient formation of a turn around the stator teeth located between the slots. Even types of connection on the same end face of the stator can differ from the inside or outside of the stator due to the different bending directions of a pin foot.

A combination of the aforementioned types of connection on different or the same end faces of the stator is also possible. By using the same type of connection on the same end faces and different types of connection on different end faces of the stator, quick and easy production is possible. For example, on one face the connection is made by a kind of pre-bent pins, so-called double pins or also called Upins, and on another face of the stator pins are welded individually or one side of the double pin is welded together. The welding points can be at the feet of the pins or double pins.

In one embodiment of the invention, the stator can have at least two turns and at least the fourth pin in the second slot can be connected to a fifth pin in the 4n-1 layer in a third slot by means of a fourth type of connection.

More preferably, the stator can have a plurality of turns that stretch over the entire circumference of the stator and thereby form a partial coil.

As a result, the windings have a symmetry which creates a uniform rotating field.

In a further refinement, one pin each of two sub-coils can be connected to one another by means of a fifth type of connection.

These pins can be so-called end pins, as they mark the end of a sub-coil. Preferred can a second and third end pin can be connected to one another by a fifth connection type.

The fifth type of connection can be implemented using a specially bent pin, for example. Preferably, at least two sub-coils can form one coil. It is possible to interconnect the coils within a quarter of all slots in the stator, i.e. within a quarter of the circumference of the stator.

More preferably, one input of each pin of two coils can be connected to one another by means of a sixth type of connection.

The sixth type of connection can be made by a conductor attached to the pins or by a conductive ring. The two coils can be connected in parallel and can also be fed by the same phase. The parallel connection can be made by connecting a first and fifth or fourth and eighth end pin in pairs.

The two coils can be connected in parallel and can also be fed by the same phase.

In a preferred embodiment of the invention, the coil sections can form six coils and six phases can be assigned to them in such a way that two coils, which are assigned to different phases, are located in adjacent slots. Furthermore, two phases can each have an almost identical current and voltage curve, and as a result a six phase inverter can only drive a three-phase motor. With this arrangement, current sharing of the switching elements in the inverter is possible. Preferably, one output of each pin of the two coils can be connected to one another and the two coils can thereby be switched in parallel, and in particular assigned to a phase.

Two coils from adjacent slots can thus be switched in parallel and fed by one phase, so that a stator with windings for a three-phase electrical machine is created.

More preferably, the second type of connection can comprise a first double pin, which is formed from the second pin and the third pin, the first double pin having two inwardly bent pin feet each with a welding point and bridging a first radial distance.

The double pin can be inserted into the stator from one end and welded to another double pin on the other end.

In one embodiment of the invention, the fourth type of connec tion can comprise a second double pin, which is formed from the fourth pin and the fifth pin, the second double pin having two outwardly bent pin feet each with a welding point and bridging a first radial distance.

The fifth type of connection can preferably comprise a third double pin, which is formed from a second end pin and a third end pin, the third double pin having two outwardly bent pin feet each with a welding point and bridging a second radial distance.

The first distance describes the number of slots to be bridged. The actual spatial distance to be bridged depends on the position of the pin in the layer, because the double pins connect different layers. The second radial distance can be at least one groove shorter than the first radial distance.

More preferably, a seventh type of connection can comprise a fourth double pin, which is formed from a sixth end pin and a seventh end pin, the fourth double pin having two inwardly bent pin bases each with a weld point and bridging a second radial distance.

In one embodiment of the invention, a single pin can comprise a fourth end pin or a fifth end pin and have a pin base bent in a clockwise direction with a spot weld.

In a further embodiment, a single pin can comprise a first end pin or an eighth end pin and have a pin foot bent counterclockwise with a spot weld.

The first type of connection can preferably be formed by a welding connection of a first welding point on the pin base of the second double pin or the first single pin or the third double pin with a second welding point on the pin base of the first double pin or the fourth double pin or the fourth single pin.

In a further embodiment of the invention, the third type of connection can be formed by a welded connection of a third weld point on the pin base of the second double pin or the third double pin or the second single pin with a second weld point on the pin base of the second double pin or the fourth double pin or the third single pin .

According to the invention, a vehicle has an electrical machine with a stator according to one of the preferred configurations. Description of the figures Figure 1 shows a stator.

Figure 2 shows a stator with eight slots and four layers.

FIG. 3 shows a winding diagram of a first partial coil.

FIG. 4 shows a winding diagram of a second partial coil.

Figure 5 shows a stator with two sub-coils and their connection to each other and thus a coil.

Figure 6 shows a stator with two coils, each consisting of two sub-coils.

Figure 7 shows a stator with two further coils.

Figure 8 shows a stator with two further coils.

Figure 9 shows a stator with six coils.

Figure 10 shows a winding scheme of two coils,

Figure 11 shows two individual pins of the first coil,

Figure 12 shows two individual pins of the second coil,

Figure 13 shows a double pin with inwardly bent pin feet.

FIG. 14 shows a double pin with outwardly bent pin feet.

FIG. 15 shows a double pin with outwardly bent pin feet and a groove width that is one groove smaller than the double pin from FIG. 14.

FIG. 16 shows a double pin with inwardly bent pin bases and a groove width that is one groove smaller than the double pin from FIG. 13. FIG. 17 shows a vehicle with an electric machine, in particular an electric motor, with a stator with an interface.

FIG. 1 shows a stator 1 with a large number of slots 5 in which pins 3 are guided. The stator has a first end face 7 and a second end face 9. On the first end face 7 inputs 81, 87, 101, 107, 111, 117 and outputs 83, 85, 103, 105, 113, 115 of partial coils for connecting the pins to an energy source for operating the electrical machine are shown. Of course, a rotor is also required to operate an electrical machine. The pins for the connection are close together and enable short connecting cables.

Figure 2 shows a stator 1 with slots 51, 52, 53, 54, 55,

56, 57, 58 and pins 21, 22, 23, 24 on four layers, where le diglich eight grooves are shown. Pins are arranged in the grooves. The pins lie next to one another in a groove; in the example in FIG. 2, four pins lie next to one another in a groove. The four pins within a slot are therefore on un ferent concentric circles around the center M of the stator, which thus form individual layers LI, L2, L3, L4. A first distance 71 lies between each two grooves. This first distance 71 is identical between all of the grooves shown in FIG.

FIG. 3 shows the stator 1 from FIG. 2. The pins are furthermore arranged on concentric circles, that is to say layers, the concentric circles not being drawn in for a better representation. FIG. 3 shows which pins are connected to one another in series. A first pin 21 is located in a first groove 51 in layer L3. This first pin 51 is by means of a first type of connection 61, as The dotted line is connected to a second pin 22 in groove 52. The second pin 22 is located in layer L4.

The second pin 22 is connected to a third pin 23 in groove 51 by means of a second type of connection 62, shown as a short dashed line. The third pin 23 is in turn located in the first groove 51, that is, in the same groove as the first pin 21. However, the third pin 23 is in layer L2 directly next to the first pin 21. In addition to the two pins 21, 23 in the groove 51 there is still space for two more pins in layers LI and L4. The third pin 23 is connected to a fourth pin 24 via a third connection type 63, shown as a solid line. The fourth pin 24 is in the same groove 52 as the second pin 22. The fourth pin 24 is in the layer LI. Between the fourth pin 24 and the second pin 22 there is still space in the groove 52 for two more pins. The connection of the first, second, third and fourth pins forms a first turn 41.

The fourth pin 24 is connected via a fourth type of connection 64, shown in dashed lines, to a fifth pin 25 in layer L3 in a third groove 53. The previously described serial connection of the subsequent pins in the stator begins again with the fifth pin 25, the fifth pin 25 being similar to the first pin 21 with an offset of the groove by 90 degrees. The first pin 21 is, however, a first end pin 21 and has an input, see FIG. 11.

The serial connection of the fifth pin 25 with further pins in the grooves 53 and 54 forms a second turn 42. The first, second and third connection types 61, 62, 63 between these pins are identical to the respective first, second and third connection types 61, 62, 63 of the pins of the first turn 41. The two turns 41, 42 are connected by the fourth connec tion type 64. By continuing the serial connection, the third turn 43 is formed in the grooves 55, 56 and the fourth turn 44 is formed in the grooves 57, 58. The windings 42, 43, 44 are each connected to the fourth type of connection 64. The fourth type of connection 64 between the respective turns is thus identical. The first, second and third connection types 61, 62, 63 between the pins of the turns 43, 44 are identical to the first, second and third connection types 61, 62, 63 of the first and second turns 41, 42.

The four turns 41, 42, 43, 44 form a first partial coil by rotating around the stator 1 in a clockwise direction. The last pin of the coil section is in turn a second end pin 26. The slots have an identical first distance 71 from one another.

FIG. 4 shows the stator 1 from FIG. 3, eight slots 91, 92, 93, 94, 95, 96, 97, 98 being shown there, which are located in the direct vicinity of the slots from FIG.

Pins 31, 32, 33, 34, 35 are connected in the same way as pins 21, 22, 23, 24, 25 of FIG. Even the type of connection is identical to FIG. 3 and is made clear by the same reference numerals. In the same way as described for FIG. 3, the turns 45, 46, 47 and 48 are formed and are connected to one another in a clockwise direction by the fourth type of connection 64. The first pin 31 is in turn a third end pin 31.

The fourth pin in groove 98 on layer LI of turn 48 is a fourth end pin 36 and has an output 83 for connecting an energy source. The four turns 45, 46, 47, 48 form a second sub-coil. FIG. 5 shows a pin assignment through the first and second sub-coil from FIGS. 3 and 4, which are represented by black squares. The same reference symbols designate the same pins, grooves and connections in the figures. The fourth pin of the turn 48 of the first partial coil in slot 58, layer LI and the first pin of the first turn 45 in slot 91, layer L3 are connected to a fifth type of connection 65. The two partial coils thus form a first coil with an input 81 and an output 83 after two radial cycles around the stator. The end pins 21, 26, 36, 31 can thus be seen, each of which marks the beginning and the end of a coil section.

FIG. 6 shows a pin assignment through the first and second sub-coil from FIGS. 3 and 4, which are represented by black squares. The same reference symbols denote the same pins, grooves and connections in the figures. Furthermore, two further sub-coils based on the principle of FIGS. 3 and 4 are drawn as black squares on a white background, which, however, are each offset by 5 slots compared to the first coil and each form a second and third sub-coil. These two sub-coils are also connected by means of the fifth type of connection 65 between a pin in slot 58, layer L2 and a pin in slot 91, layer L4 and form a second coil. The second coil is opposite to the first coil verbun.

In Figure 6, two parallel coils are shown, each of which consists of two sub-coils. The inputs and outputs of the coils are also shown. The input 81 of the first coil is located on the slot 51 and the output 83 on the slot 98. The input 87 of the second coil is also located on the slot 51 and the output 85 on the slot 98. The inputs and outputs of both Coils are thus in the respective same groove. The second radial distance 73 is, for example, a groove shorter than the first radial distance 71.

FIG. 7 shows a pin assignment through a third and fourth coil in the black squares with a white point and the white squares with a black point. This is created by a winding scheme known from FIGS. 3, 4, 5, which is offset by two slots in a clockwise direction compared to the pins and connections provided there. The inputs 101 and outputs 103 of the third coil and inputs 107 and outputs 105 of the fourth coil are also shown. The inputs and outputs of both coils are therefore in the same slot.

FIG. 8 shows a pin assignment through a fifth and sixth coil. This is created by a winding scheme known from FIGS. 3, 4, 5, which is offset by four slots in a clockwise direction compared to the pins and connections shown there.

The inputs 111 and outputs 113 of the fifth coil and inputs 117 and outputs 115 of the sixth coil are also shown. The inputs and outputs of both coils are therefore in the same slot.

FIG. 9 shows a pin assignment through the six coils as a combination of FIGS. 6, 7 and 8. In particular, from the position of the inputs 81, 87, 101, 107, 111, 117 and outputs 83, 85, 103, 105, 113 , 115 it can be seen that the coils can be interconnected within 12 slots. In the 48 slot stator shown, the inputs and outputs can therefore be interconnected within a quarter of the circumference of the stator.

FIG. 10 shows two coils 201, 202, which each consist of two sub-coils. The same reference numerals represent the Connection with the other figures. The connection of the coil sections to the coil and the connection of the respective coil to an inverter, for example, can be seen in FIG. Pin 21 of the first coil 201 represents a first end pin 21 and has an input 81. By means of a serial connection of the horizontally dashed pins by means of the dashed arrows, the stator is almost completely rotated once radially and the first circulation, which includes the first part of the coil, is formed. The first end pin 21 is located at the beginning of the first sub-coil and the second end pin 26 is located at the end.

The second sub-coil is formed by connecting the horizontally dashed pins with the solid arrows. The coil section begins with the third end pin 31 and ends with the fourth end pin 36. The fourth end pin is connected via the output 83 to an inverter, for example. The fifth type of connection 65 is located between the second end pin 26 of the first coil section and the third end pin 31 of the second coil section. Both end pins 31, 26 and the fifth type of connection 65 are shown in FIG. Both revolutions of the first coil 201 take place in a first direction, for example counterclockwise.

Pin 20 of the second coil 202 represents a fifth end pin 20 and has an input 87. By means of a serial connection of the horizontally dashed pins by means of the dashed arrows, the stator is almost completely rotated radially and the first rotation, which includes the first sub-coil, is formed. The fifth end pin 21 is located at the beginning of the second sub-coil and the sixth end pin 28 is located at the end.

The second sub-coil is formed by connecting the horizontally dashed pins with the solid arrows. The coil section begins with the seventh end pin 38 and ends with the eighth end pin 30. The eighth end pin 30 is connected via the output 85 to an inverter, for example. The seventh type of connection 67 is located between the sixth end pin 28 of the first coil section and the seventh end pin 38 of the second coil section. Both end pins 28, 38 and the seventh type of connection 67 are shown in FIG.

Both revolutions of the second coil 201 take place in a second direction, for example counterclockwise. The directions of rotation of the two coils can be freely selected, but they are opposite to one another.

FIG. 11 shows two individual pins 217, 219 or Ipins. In the middle is the actual pin 36, 21, which is arranged in the slot of the stator. The reference numerals are identical to the previous figures. The pins are shown from the perspective of the stator center point with the first end face 7 facing up. At the upper end is the input 81, 101, 111 or output 83, 103, 113.

The left single pin 219 is used on layer 1 for the fourth end pin 36. At the lower end, the end pin has a pin foot 63a with a weld point 225. At the top is the exit, 83, 103, 113.

The right single pin 217 is used on layer 3 for the first end pin 21 or first pin 21. At the lower end, the end pin has a pin foot 61a with a weld point 221. At the upper end is the entrance 81, 101, 111.

FIG. 12 shows two individual pins 218, 220 or Ipins. In the middle is the actual pin 30, 20, which is arranged in the slot of the stator. The reference numerals are identical to the previous figures. The pins are out of view of the stator center point with the first end face 7 upwards.

The left single pin 218 is used on layer 2 for the eighth end pin 30. At the lower end, the end pin has a pin foot 63b with a weld point 227. At the top end is the exit 85, 105, 115.

The right single pin 220 is used on layer 4 for the fifth end pin 20. At the lower end, the end pin has a pin foot 61a with a weld point 223. Exit 87, 107, 117 is located at the upper end.

FIG. 13 shows a first double pin 211 or Upin, which establishes the connection type 62 between a second pin 22, 32 and a third pin 23, 33. The double pin can bridge the first distance 71 between the grooves. At the lower end, the double pin has two inwardly bent pin feet 61a, 63b with a spot weld 223, 227.

FIG. 14 shows a second double pin 213 or Upin, which establishes the connection type 64 between a fourth 24, 34 and a fifth pin 25, 35. The double pin can bridge the first distance 71 between the grooves. At the lower end, the double pin has two outwardly bent pin feet 61b, 63a with a welding point 221, 225.

The first distance 71 is only identical with regard to the number of grooves to be bridged. The actual spatial distance to be bridged differs because the double pins connect different layers.

FIG. 15 shows a third double pin 214 or Upin, which establishes the type of connection 65 between a second end pin 26 and a third end pin 31. The double pin can change the distance So 73 by one groove less than the first distance 71 be wears, bridge. At the lower end, the double pin has two outwardly bent pin feet 61b, 63a with a spot weld 221, 225.

FIG. 16 shows a fourth double pin 215 or Upin, which produces the type of connection 67 between a sixth end pin 28 and a seventh end pin 38. The double pin can bridge the distance 73 by one groove less than the first distance 71 be. At the lower end, the double pin has two inwardly bent pin feet 61a, 63b with a spot weld 223, 227.

The various single and double pins in FIGS. 11 to 16 have similar pin feet. The connection 61 is formed by welding the weld points 221, 223 to the pin feet 61a, 61b in accordance with the winding diagram of FIG. The connection 63 is formed by welding the weld points 225, 227 to the pin feet 63a, 63b in accordance with the winding diagram of FIG.

FIG. 16 is a schematic diagram of an exemplary embodiment of a vehicle 403, for example a hybrid vehicle or an electric vehicle, comprising an electrical machine 401, in particular an electric motor, with an exemplary embodiment of the stator 1 for driving the vehicle 403 Inverter 405 aufwei sen, which supplies the electric machine 401 with an alternating current from a direct current source. List of reference symbols

1 stator

2, 21, 22, 23, 24, 25 pin 31, 32, 33, 34, 35 pin

5, 51, 52, 53, 54, 55, 56, groove

57, 58, 91, 92, 93, 94, 95, groove

96, 97, 98 groove 7 first face 9 second face

20, 21, 26, 28, 30, 31, 36, 38 end pins 41 - 48 turns

61 first type of connection

62 second type of connection 63 third type of connection

64 fourth type of connection

65 fifth type of connection

66 sixth type of connection

67 seventh type of connection 61a, 61b, 63a, 63b pin foot

71 first radial distance

73 second radial distance 401 electric machine

81, 87, 101, 107, 111, 117 input 83, 85, 103, 105, 113, 115 output 201 first coil 202 second coil

211, 213, 214, 215 double pin 217, 218, 219, 220 single pin 221, 223, 225, 227 spot weld 403 vehicle 405 inverter

LI, L2, L3, L4 Layer M stator center

Claims

1. Stator (1) for an electrical machine (401), including send

- A plurality of pins (21, 22, 23, 24, 31, 32, 33, 34) on concentric circles with different distances from a stator center (M) in slots (51, 52, 53, 54, 55, 56, 57, 58) are arranged and each concentric circle forms a layer (LI, L2, L3, L4);

- with four pins (21, 22, 23, 24, 25, 31,

32, 33, 34, 35) in different layers (LI, L2, L3, L4) are connected in series and form a turn (41),

- A first pin (21) of the winding (41) is located in a first groove (51) in the 4n-1 layer (L3), where n is a natural number;

- A second pin (22) of the winding (41) is located in a second groove (52) in the 4n layer (L4), the second groove (52) having a first radial distance (71) in a first circumferential direction of the stator

(1) to the first groove (51);

- A third pin (23) of the turn (41) is located in the first groove (51) in the 4n-3 layer (L2);

- A fourth pin (24) of the turn (41) is located in the second groove (52) in the 4n-3 layer (LI).

2. Stator (1) according to claim 1, wherein the stator (1) has a first end face (7) and a second end face (9); and - The first (21) and second pin (22) on the second end face (9) by means of a first type of connection

(61) is connected to each other;

- The second (22) and third pin (23) on the first end face (7) by means of a second type of connection

(62) is connected to each other;

- The third (23) and fourth pin (24) on the second face by means of a third type of connection

(63) is connected to each other;

- The first, second and third connection types differ from one another.

3. stator (1) according to any one of the preceding claims, wherein the stator (1) has at least two turns (41, 42, 43, 44) and at least the fourth pin (24) in the two th groove (52, 54, 56 ) is connected to a fifth pin (25) in the 4n-l layer (L3) in a third groove (53) by means of a fourth type of connection (64).

4. Stator (1) according to claim 3, wherein the stator (1) has a plurality of turns (41, 42, 43, 44) which extend over the entire circumference of the stator (1) and thereby form a partial coil.

5. stator (1) according to claim 4, wherein each pin of two sub-coils is connected to one another by means of a fifth type of connection (65).

6. stator (1) according to claim 5, wherein at least two part coils form a coil (201, 202).

7. The stator (1) according to claim 6, wherein the sub-coils form six coils and these are assigned six phases in such a way that there are two coils, the different ones Phases are assigned, located in adjacent grooves (51-58, 91-98).

8. stator (1) according to claim 6, wherein each input (81,

101, 111, 85, 105, 115) of a pin (21) of two coils

(201, 202) are connected to one another by means of a sixth type of connection (66).

9. stator (1) according to claim 8, wherein each output (83,

103, 113, 87, 107, 117) of a pin (36) of the two coils

(201, 202) are connected to one another and the two coils are thereby connected in parallel and, in particular, are assigned to one phase.

10. Stator (1) according to one of the preceding claims, wherein the second type of connection (62) comprises a first double pin (211) which is formed from the second pin (22, 32) and the third pin (23, 33), wherein the first double pin (211) has two inwardly curved pin feet (61a, 63b) each with a weld point (223, 227) and bridges a first radial distance (71).

11. Stator (1) according to one of the preceding claims, wherein the fourth type of connection (64) has a second double pin

(213), which is formed from the fourth pin (24, 34) and the fifth pin (25, 35), the second double pin (213) having two outwardly bent pin feet (61b, 63a) each with a spot weld (221 , 225) and bridges a first radial distance (71).

12. Stator (1) according to one of the preceding claims, wherein the fifth type of connection (65) has a third double pin

(214) which is formed from a second end pin (26) and a third end pin (31), the third double pin (214) having two outwardly bent pin feet (61b, 63a) each with a weld point (221, 225) and bridges a second radial distance (73).

13. Stator (1) according to one of the preceding claims, wherein a seventh type of connection (67) comprises a fourth double pin (215) which is formed from a sixth end pin (28) and a seventh end pin (38), the fourth double pin ( 215) has two inwardly bent pin feet (61a, 63b) each with a weld point (223, 227) and bridges a second radial distance (73).

14. Stator (1) according to one of the preceding claims, wherein a single pin (219, 220) comprises a fourth end pin (36) or a fifth end pin (20) and a clockwise bent pin base (61a, 63a) with a welding point (223, 225).

15. Stator (1) according to one of the preceding claims, wherein a single pin (217, 218) comprises a first end pin (21) or an eighth end pin (30) and a counterclockwise bent pin foot (61b, 63b) with a spot weld ( 221, 227).

16. Stator (1) according to one of the preceding claims, wherein the first type of connection (61) by a welding connection of a first welding point (221) on the pin foot (61b) of the second double pin (213) or the first single pin (217) or the third Double pins (214) with a second welding point (223) on the pin foot (61a) of the first double pin (21) or the fourth double pin (215) or the fourth single pin (220) is formed.

17. Stator (1) according to one of the preceding claims, wherein the third type of connection (63) by a weld connection of a third weld point (225) on the pin foot (63a) the second double pin (213) or the third double pin (214) or the second single pin (219) with a second welding point (227) on the pin foot (63b) of the second double pin (213) or the fourth double pin (215) or the third Single pins (218) is formed.

18. Vehicle (403) with an electrical machine (401) with a stator (1) according to one of the preceding claims.