Stator with pins for an electric machine

Abstract

A stator (1) for an electric motor (100) includes: - a plurality of pins (21, 22, 23, 24, 25) arranged in slots (51~58, 91~98) in the stator (1) on concentric circles at different distances from the center (M) of the stator, and each concentric circle forming a layer (L1, L2, L3, L4); - wherein four pins (21, 22, 23, 24, 25) in each of the different layers (L1, L2, L3, L4) are connected in series to form a coil (41); - the first pin (21) of the coil (41) is located in the first slot (51) of the 4n-1th layer (L3). In the following, n is a natural number, the second pin (22) of the - wire turn (41) is located in the second slot (58) in the 4n layer (L4), wherein the second slot (58) is a first radial distance (11) from the first slot (51) in the first circumferential direction of the stator (1), the third pin (23) of the - wire turn (41) is located in the third slot (91) in the 4n-2 layer (L2), wherein the third slot (91) is adjacent to the first slot (51), and the fourth pin (24) of the - wire turn (41) is located in the fourth slot (98) in the 4n-3 layer (L1), wherein the fourth slot (98) is adjacent to the second slot (58).

Description

Technical Field

[0001] The present invention relates to a stator with pins for use in electric motors, and more particularly for use in electric motors. Background Technology

[0002] Electric motors are well-known and increasingly used to drive vehicles. An electric motor consists of a stator and a rotor.

[0003] The stator includes multiple slots in which the wire turns are guided. The wire turns may be formed from insulated copper rods as so-called pins. The rotor is located in the stator and connected to the rotor shaft.

[0004] Such pin motors, U-pin motors, or hairpin motors are known, for example, from US 9,136,738 B2. Summary of the Invention

[0005] The objective of this invention is to provide a stator that is easy to manufacture and has coils consisting of pins.

[0006] According to the present invention, the stator for an electric motor includes a plurality of pins arranged in slots in the stator on concentric circles with different distances from the center of the stator, and each concentric circle forms a layer, wherein four pins in each different layer are connected in series to form a coil, the first pin of the coil is located in the first slot of the 4n-1 layer, where n is a natural number, the second pin of the coil is located in the second slot of the 4n layer, wherein the second slot is located at a first radial distance from the first slot in the first circumferential direction of the stator, the third pin of the coil is located in the third slot of the 4n-2 layer, wherein the third slot is adjacent to the first slot, and the fourth pin of the coil is located in the fourth slot of the 4n-3 layer, wherein the fourth slot is adjacent to the second slot.

[0007] Layers can be numbered in ascending order from the outside inwards towards the center of the stator. Natural numbers do not include zero.

[0008] A stator with windings according to the invention can be easily manufactured and produces an effective electromagnetic field with less iron loss or hysteresis loss and better utilization of the laminated core. The connection type establishes a conductive connection between pins in the slot. The connection type can be welding from the conductor to the pin, or the pin can be constructed as a double pin, i.e., a so-called U-pin, thus establishing a connection upon introduction into the stator. Furthermore, welding the pin end sections bent towards each other is also a connection type.

[0009] Preferably, the third and fourth grooves are located on the same adjacent sides of the first and second grooves in the circumferential direction.

[0010] The rotating magnetic field generated by this type of coil has fewer interfering harmonics, resulting in less torque ripple, smaller torque fluctuations, and better NVH performance.

[0011] More preferably, a first gap may exist between the first and second grooves and between the third and fourth grooves, while a second gap may exist between the third and second grooves, and the second gap may be smaller than the first gap.

[0012] A stator with coils distributed at different intervals on the slots has less AC ohmic loss and lower saturation.

[0013] In one design of the present invention, the stator may have a first end side and a second end side, and the first pin and the second pin on the second end side may be connected to each other by a first type of connection, the second pin and the third pin on the first end side may be connected to each other by a second type of connection, and the third pin and the fourth pin on the second end side may be connected to each other by a third type of connection, wherein the first, second and third types of connections are different from each other.

[0014] Different connection types enable improved manufacturing. Alternating positions of connection types on different end sides allow for the effective formation of wire turns around the stator teeth located between slots.

[0015] Because the bending direction of the pins relative to the inside or outside of the stator may differ, even the connection type on the same end side of the stator may be different.

[0016] Combinations of the aforementioned connection types on different or the same end sides of the stator are also feasible. Due to the identical connection types on the same end sides of the stator and the different connection types on different end sides, simple and rapid production can be achieved. For example, a connection can be established on one end side using a pre-bent pin type, namely a double pin or U-pin, and on the other end side of the stator, the pin is welded individually or one side of each double pin is welded. The welding point can be on the foot of the pin or double pin.

[0017] Preferably, the stator may have at least two turns, and the fourth pin in at least the fourth slot may be connected to the fifth pin in the (4n-1)th layer in the fifth slot via a fourth type of connection.

[0018] More preferably, the stator may have multiple turns that extend over the entire circumference of the stator and form sub-coils thereon.

[0019] As a result, the windings are symmetrical, which generates a uniform rotating field.

[0020] In another design, each pin of the two sub-coils can be connected to each other via a fifth-type connection or a sixth-type connection to form a coil.

[0021] These pins can be called end pins because they mark the ends of the sub-coils.

[0022] Preferably, the sub-coils can form six coils and be assigned to three phases, such that two coils assigned to the same phase are located in three adjacent slots, and the two outermost slots are occupied by pins of other phases.

[0023] More preferably, the input terminals of at least two coils can be connected to each other via a type 7 connection.

[0024] The seventh type of connection can be established by a conductor mounted on a pin or by a conductive ring.

[0025] In a preferred embodiment of the invention, the outputs of at least two coils can be connected to each other, and thus the two coils can be connected in parallel and, in particular, belong to a single phase.

[0026] These two coils can be connected in parallel and, additionally, can be powered by the same phase. The parallel connection can be achieved by pairing the first and fifth end pins or the fourth and eighth end pins.

[0027] Furthermore, the two phases can each have nearly identical current and voltage curves, allowing the six-phase inverter to drive only a three-phase motor. This arrangement enables the current to be distributed among the switching elements within the inverter.

[0028] Therefore, two coils in the same slot can be connected in parallel to be powered by one phase, thus creating a stator with windings for a three-phase motor.

[0029] According to the present invention, the vehicle is equipped with a motor having a stator according to one of the preferred designs. Attached Figure Description

[0030] Figure 1 The stator is shown;

[0031] Figure 2 A stator with eight slots and four layers is shown;

[0032] Figure 3 A schematic diagram of the winding of the first sub-coil is shown;

[0033] Figure 4 A schematic diagram of the winding of the second sub-coil is shown;

[0034] Figure 5 A stator with first and second sub-coils is shown, as well as their connection to each other, and thus the first coil is shown;

[0035] Figure 6 A schematic diagram of the winding of another sub-coil is shown;

[0036] Figure 7 A schematic diagram of the winding of another sub-coil is shown;

[0037] Figure 8 The stator with two additional sub-coils is shown, as well as their connection to each other, and thus it is a second coil;

[0038] Figure 9 A stator with two coils is shown, each coil consisting of two sub-coils;

[0039] Figure 10 A stator with two additional coils is shown;

[0040] Figure 11 A stator with two additional coils is shown;

[0041] Figure 12 A stator with six coils is shown;

[0042] Figure 13 A schematic diagram of the coil turns is shown;

[0043] Figure 14 A vehicle with an electric motor, particularly an electric motor, is shown, which has a stator equipped with an inverter. Detailed Implementation

[0044] Figure 1 A stator 1 with multiple slots 5 is shown, in which pins 2 and 3 are guided. The stator 1 has a first end side 7 and an opposite second end side 9. Input terminals 81, 87, 101, 107, 111, and 117 and output terminals 83, 85, 103, 105, 113, and 115 of sub-coils are shown on the first end side 7. These sub-coils are used to connect the pins to an energy source for operating the motor. Clearly, a rotor is also required to operate the motor. The pins for connection are placed close to each other, allowing for short connection lines.

[0045] Figure 2 Stator 1 is shown, which has slots and pins in four layers, of which only eight slots 51, 52, 53, 54, 55, 56, 57, and 58 are shown. Pins 21 and 22 are arranged in the slots. The pins are located side by side in the slots. Figure 2 In the example, there is space in the slot for four pins to be placed side by side. Therefore, the four pins within the slot are located on different concentric circles around the center M of the stator, thus forming a single layer L1, L2, L3, L4. A first spacing 11 is located between each pair of slots. This first spacing 11 is present in all... Figure 2 The slots shown are identical.

[0046] Figure 3 It shows Figure 2 Stator 1. In addition, the pins are arranged on concentric circles, that is, on layers, wherein the concentric circles are not drawn for better illustration. Figure 3 The diagram shows which pins are connected in series with each other. The first pin 21, which is also the end pin, is located in the first slot 51 in layer L3. This first pin 21 is connected to the second pin 22 in the second slot 58 via a first-type connection 61 (shown in solid lines). The second pin 22 is located in layer L4. The second pin 22 is connected to the third pin 23 in the third slot 91 via a second-type connection 62 (shown in short dashed lines). The third slot 91 is radially adjacent to the first slot 51 and lies between the first slot 51 and the second slot 58. The third pin 23 is located in layer L2.

[0047] The third slot 91 is separated from the second slot 58 by a second spacing 13. The second spacing 13 is a slot that is shorter than the first spacing 11 in the previous attached figure.

[0048] As will be understood by those skilled in the art, different spacings always involve the same layer. For example, since the radius of layer 4 is smaller than that of layer 1, the spacing between two slots in layer 4 is obviously smaller than the spacing between two slots in layer 1.

[0049] The third pin 23 is connected to the fourth pin 24 via a third-type connection 63, as shown by the dashed line. The fourth pin 24 is located in the fourth slot 98. The fourth slot 98 is radially adjacent to the second slot 58 and between the second slot 58 and the fifth slot 57. The fourth pin 24 is located in layer L1.

[0050] The connection of the first, second, third and fourth pins forms the first wire turn 41.

[0051] The fourth pin 24 is connected to the fifth pin 25 in the fifth slot 57 via a fourth type connection 64 (as shown by the dashed line). The fifth pin 25 is in layer L3. The series connection of subsequent pins in the stator described above again begins with the fifth pin 25, which is similar to the first pin 21 but offset by 90 degrees in terms of slot. Unlike the first pin 21, the fifth pin 25 is not an end pin, as it connects to two other pins, while the first end pin 21 has only one connection with the second pin 22.

[0052] The fifth pin 25 is connected in series with the other pins in three additional slots 56, 97 and 96 to form the second wire turn 42. The first, second and third type connections 61, 62, 63 between these pins are the same as the respective first, second and third type connections 61, 62, 63 of the pins of the first wire turn 41.

[0053] Two wire turns 41 and 42 are connected by a fourth type connection 64. A third wire turn 43 and a fourth wire turn 44 are formed in four additional slots 55, 54, 95 and 94, and 53, 52, 93, and 92, by continuing the series connection. Wire turns 41, 42, 43, and 44 are each connected to a fourth type connection 64. Therefore, the fourth type connections 64 between the respective wire turns are identical. The first, second, and third type connections 61, 62, and 63 between the pins of wire turns 43 and 44 are also identical to the first, second, and third type connections 61, 62, and 63 between the first and second wire turns 41 and 42.

[0054] Four turns 41, 42, 43, and 44 form a first sub-coil by winding around the stator 1 in a counter-clockwise direction. The first pin 21 also has an input terminal 81 for connecting to an energy source. Therefore, the first pin 21 of turn 41 represents a first end pin. The sub-coil terminates with pin 28 in layer L1 of turn 44. The last pin 28 of turn 43 is therefore a second end pin.

[0055] Figure 4 Stator 1 is shown, where eight additional slots 71, 72, 73, 74, 75, 76, 77, and 78 are shown.

[0056] Sales numbers 31, 32, 33, 34, 35, and 38 are related to... Figure 1 Pins 21, 22, 23, 24, 25, and 28 are connected in the same way. Even the connection type is the same. Figure 3 They are identical, and clearly have the same reference numerals and lines. (The last two sentences appear to be fragments and don't translate directly.) Figure 3 In the same manner described, turns 45, 46, 47, and 48 are formed and they are connected to each other counterclockwise via a fourth type of connection 64.

[0057] Four turns 45, 46, 47, and 48 form a second sub-coil by winding clockwise around stator 1. The sub-coil begins with a first pin 31, which is also the third end pin. The sub-coil ends with pin 38 of turn 48. Therefore, the last pin 38 of turn 48 in layer L1 is the fourth end pin. The fourth end pin 38 also has an output terminal 0 for connecting to an energy source. Of course, the input terminal 81 and the output terminal 83 can also be interchanged.

[0058] Figure 5 It shows Figure 3 and Figure 4 The pin assignments of the first and second sub-coils are indicated by black squares. The same reference numerals in the figures indicate the same pins, slots, and connections. The sixth pin 28 (which is also the second end pin) of the fourth turn 44 of the first sub-coil in layer L1, slot 92, and the first pin 31 of the first turn 45 of the second sub-coil in layer L3, slot 71, are connected to the fifth type connection 67.

[0059] Therefore, the two sub-coils form the first coil 201, which has an input terminal 81 and an output terminal 83 formed after twice radially wrapping around the stator in a counterclockwise direction. The third spacing 15 shown in the figure consists of two slots shorter than the first spacing 11 in the previous figure and one slot shorter than the second spacing 13 in the previous figure.

[0060] Figure 6 Stator 1 is shown. Pins are also arranged in concentric circles, i.e., layers, which are not drawn for better illustration. Pins shown as black squares on a white background are connected in series to form the first sub-coil of the second coil 202. The fifth end pin 21a is located in the first slot 51 in layer L4. The fifth end pin 21a also has an input terminal 87 for connecting to an energy source. The fifth end pin 21a is connected to the sixth pin 26a in slot 52 via a first type connection 61. The sixth pin 26a is located in layer L3. The sixth pin 26a is connected to the fourth pin 24a in layer L1 in slot 93 via a fourth type connection 64.

[0061] The fourth pin 24a is connected to the third pin 23a via a third-type connection 63, as shown by the dotted line. The third pin 23a is located in a slot 94. Slot 94 is radially adjacent to slot 54 and is located between slots 53 and 54. The third pin 23a is located in layer L2.

[0062] The third pin 23a is connected to the second pin 22a via a second-type connection 62, as shown by the short dashed line. The second pin 22a is located in the slot 53. The slot 53 is radially adjacent to the slot 93 and is located between the slots 93 and 94. The second pin 22a is located in layer L4.

[0063] The second pin 22a is connected to the fifth pin 25a via a first-type connection 61, as shown by the solid line. The fifth pin 25a is located in a slot 54. Slot 54 is radially adjacent to slot 94 and located between slots 94 and 95. The fifth pin 25a is located in layer L3. The series connection of the first, second, third, and fourth pins 25a, 22a, 23a, and 24a forms a first wire turn 41.

[0064] The fifth pin 25a is connected to the seventh pin 27a via a fourth-type connection 64, as shown by the dashed line. The seventh pin 27a is located in slot 95. Slot 95 is radially adjacent to slot 55 and located between slot 55 and slot 54. The seventh pin 27a is located in layer L1. The series connection of subsequent pins in the stator described above also begins with the seventh pin 27a, which is similar to the fourth pin 24a but offset by 90 degrees in terms of slot.

[0065] The seventh pin 27a is connected in series with other pins in three additional slots 96, 55 and 56 to form a second wire turn 42. The first, second and third type connections 61, 62, 63 between these pins are the same as the first, second and third type connections 61, 62, 63 of the pins of the first wire turn 41.

[0066] Two wire turns 41 and 42 are connected by a fourth type of connection 64. By continuing the series connection, a third wire turn 43 is formed in another slot 97, 98, 57 and 58.

[0067] The fourth coil 44 is special because it lacks a second type of connection. This coil 44 is formed by a sixth type of connection 66, which combines... Figure 8 The description is provided and shown there. The sixth type of connection connects the sixth end pin 28a of the first sub-coil to the seventh end pin 31a, as follows: Figure 7 As shown.

[0068] Figure 7 Stator 1 is shown, in which eight additional slots 71, 72, 73, 74, 75, 76, 77, and 78 are shown.

[0069] The pins are still arranged in concentric circles, i.e., on the layers, so the concentric circles are not shown for better illustration. Pins shown as black squares on a white background are connected in series to form a second sub-coil of the second coil 202. A seventh end pin 31a is located in slot 71 in layer L4. This seventh end pin 31a is connected to a sixth pin 36a in slot 72 via a first-type connection 61. The sixth pin 36a is located in layer L3. The sixth pin 36a is connected to a fourth pin 34a in layer L1 in slot 53 via a fourth-type connection 64.

[0070] The fourth pin 34a is connected to the third pin 33a via a third-type connection 63, as shown by the dashed line. The third pin 33a is located in the slot 54. The slot 54 is radially adjacent to the slot 74 and is located between the slots 74 and 73. The third pin 33a is located in layer L2.

[0071] The third pin 33a is connected to the second pin 32a via a second-type connection 62, as shown by the short dashed line. The second pin 32a is located in a slot 73. The slot 73 is radially adjacent to the slot 53 and is located between the slots 53 and 54. The second pin 32a is located in layer L4.

[0072] The second pin 32a is connected to the fifth pin 35a via a first-type connection 61, as shown by the solid line. The fifth pin 35a is located in a slot 74. The slot 74 is radially adjacent to the slot 54 and located between slots 54 and 55. The fifth pin 35a is located in layer L3. The connection of the first, second, third, and fourth pins forms a first wire turn 45.

[0073] The fifth pin 35a is connected to the seventh pin 37a via a fourth-type connection 64, as shown by the dashed line. The seventh pin 37a is located in slot 55. Slot 55 is radially adjacent to slot 75 and is located between slot 75 and slot 74. The seventh pin 37a is located in layer L1. The series connection of subsequent pins in the stator described above begins again with the seventh pin 37a, which is similar to the fourth pin 34a but offset by 90 degrees in terms of slot.

[0074] The seventh pin 37a is connected in series with the other pins in three additional slots 56, 75 and 76 to form the second wire turn 46. The first, second and third type connections 61, 62 and 63 between these pins are the same as the first, second and third type connections of the pins of the first wire turn 45.

[0075] Two wire turns 45 and 46 are connected by a fourth type of connection 64. A third wire turn 47 is formed in four additional slots 57, 58, 77, and 78 by continuing the series connection. The fourth wire turn 48 is special because it lacks a second type of connection. This wire turn 48 is formed by a sixth type of connection 66, which combines... Figure 8 It is described and shown there.

[0076] The eighth end pin 38a also has an output terminal 85 for connecting to an energy source. Of course, the input terminal 87 and the output terminal 85 can also be interchanged.

[0077] Figure 8 It shows Figure 6 and Figure 7 The pin assignments of the two sub-coils are indicated by black squares on a white background. The same reference numerals in the figures denote the same pins, slots, and connections. Pin 28a (which is also the sixth end pin) of the fourth turn 44 of the first sub-coil in layer L2, slot 92, and pin 31a (which is also the seventh end pin) of the fourth turn 48 of the second sub-coil in layer L4, slot 71, are connected to a sixth-type connection 66.

[0078] Therefore, the two sub-coils form a second coil 202, which has an input terminal 87 and an output terminal 85 formed after twice radially wrapping around the stator in a counterclockwise direction. The third spacing 15 shown in the figure consists of two slots shorter than the first spacing 11 in the previous figure and one slot shorter than the second spacing 13 in the previous figure.

[0079] Figure 9 It shows Figure 5 The pin assignments for the first coil 201 are indicated by black squares. The same reference numerals in the figures denote the same pins, slots, and connections. Furthermore, Figure 8The second coil 202 is shown as a black square on a white background. They are located in the same slot but in different layers. The sub-coils of both coils are connected to either a fifth-type connection 65 (first coil) or a sixth-type connection 66 (second coil). The two types of connections 65 and 66 are similar, differing only in their positions within different layers.

[0080] Therefore, two coils are shown, each comprising two sub-coils. The inputs and outputs of the coils are also shown. The input terminal 81 of the first coil is located in the first slot 51, and the output terminal 83 is located in the second slot 52. The input terminal 87 of the second coil is also located in the first slot 51, and the output terminal 85 is located in the second slot 52. The inputs and outputs of the two coils are therefore located in the same slot.

[0081] Figure 10 The pin assignments for the third and fourth coils are shown, represented by black squares with white dots and white squares with black dots, respectively. This is achieved by... Figure 3 , 4 The known winding diagrams 5, 6, 7, and 8 are created, and these diagrams are offset by two slots clockwise compared to the pins and connections of the sub-coils shown therein. The input terminal 101 and output terminal 103 of the third coil and the input terminal 107 and output terminal 105 of the fourth coil are also shown. Therefore, the input and output terminals of both coils are in the same slot.

[0082] Figure 11 The pin assignments for the fifth and sixth coils are shown, represented by a black square with a white cross and a white square with a black cross, respectively. This is achieved by... Figure 3 , 4 The known winding diagrams for coils 5, 6, 7, and 8 are created, and these diagrams are offset by four slots clockwise compared to the pins and connections of the sub-coils shown therein. The input terminal 111 and output terminal 113 of the fifth coil and the input terminal 117 and output terminal 115 of the sixth coil are also shown. Therefore, the input and output terminals of both coils are in the same slot.

[0083] Figure 12 It was shown as Figure 9 , 10 The pin assignment of the six coils in combination with 11. Specifically, it can be seen from the positions of the input terminals 81, 87, 101, 107, 111, 117 and the output terminals 83, 85, 103, 105, 113, 115 that the coils can be interconnected within 11 slots respectively. Therefore, in the example stator with forty-eight slots, the input and output terminals can be interconnected within one-third of the stator circumference. If the coils and their... Figure 10If the input and output terminals are rotated 45 degrees counterclockwise, then individual wiring can also be achieved within the five slots, purely regarding the input or output terminals. Figure 12 The illustrated embodiments result in... Figure 1 The interconnection of the input and output terminals.

[0084] Figure 13 The diagram shows the winding schematics of two sub-coils each of the first coil 201 and the second coil 202. The consecutive "slot numbers" in the table are not reference numerals. Reference numerals with arrows over the slots are the same as in the previous figures and can be referenced therein.

[0085] Figure 14 A schematic diagram of an embodiment of vehicle 403 is shown, which is, for example, a hybrid vehicle or an electric vehicle, and includes a motor 401, particularly an electric motor, having an embodiment of a stator 1 for driving vehicle 403. Furthermore, vehicle 403 may have an inverter 405 that supplies alternating current from a direct current source to motor 401.

[0086] List of reference numerals

[0087]

[0088]

Claims

1. A stator (1) for an electric motor, the stator comprising: - Multiple pins (21, 22, 23, 24, 25) are arranged in slots in the stator (1) on concentric circles with different distances from the stator center (M), and each concentric circle forms a layer (L1, L2, L3, L4). -in, The four pins in each of the different layers (L1, L2, L3, L4) are connected in series to form a wire turn (41). - The first pin (21) of the coil (41) is located in the first slot (51) in the 4n-1th layer (L3), where n is a positive integer. - The second pin (22) of the coil (41) is located in the second groove (58) in the 4n layer (L4), wherein the second groove (58) is a first distance (11) from the first groove (51) in the first circumferential direction of the stator (1). - The third pin (23) of the coil (41) is located in the third groove (91) in the 4n-2th layer (L2), wherein the third groove (91) is adjacent to the first groove (51). - The fourth pin (24) of the coil (41) is located in the fourth slot (98) in the 4n-3 layer (L1), wherein the fourth slot (98) is adjacent to the second slot (58).

2. The stator (1) according to claim 1, wherein, The third and fourth slots (91, 98) are located on the same adjacent sides of the first and second slots (51, 58) in the circumferential direction.

3. The stator (1) according to claim 1 or 2, wherein, -A first gap (11) exists between the first groove (51) and the second groove (58) and between the third groove (91) and the fourth groove (98). -A second gap (13) exists between the third groove (91) and the second groove (58). The second spacing (13) is smaller than the first spacing (11).

4. The stator (1) according to claim 1 or 2, wherein, The stator (1) has a first end side (7) and a second end side (9); and - The first pin (21) and the second pin (22) on the second end side (9) are connected to each other by a first type of connection (61); - The second pin (22) and the third pin (23) on the first end side (7) are connected to each other by a second type of connection (62); - The third pin (23) and the fourth pin (24) on the second end side (9) are connected to each other by a third type of connection (63); wherein the first, second and third type of connections are different from each other.

5. The stator (1) according to claim 1 or 2, wherein, The stator (1) has at least two turns (41, 42, 43), and at least the fourth pin (24) in the fourth slot (98) is connected to the fifth pin in the 4n-1 layer (L3) in the fifth slot (57) via a fourth type connection (64).

6. The stator (1) according to claim 5, wherein, The stator (1) has a plurality of turns (41, 42) extending over the entire circumference of the stator (1) and forming sub-coils thereon.

7. The stator (1) according to claim 6, wherein, Each pin (28, 31, 28a, 31a) of the two sub-coils is connected to each other by a fifth type connection (65) or a sixth type connection (66) and forms a coil (201, 202).

8. The stator (1) according to claim 7, wherein, The sub-coils form six coils and are assigned to three phases, such that two coils assigned to the same phase are located in three adjacent slots (51-58, 71-78, 91-98), and the two outer slots (71-78, 91-98) are occupied by pins of other phases.

9. The stator (1) according to claim 8, wherein, The input terminals (81, 101, 111, 87, 107, 117) of at least two coils (201, 202) are connected to each other via a type 7 connection.

10. The stator (1) according to claim 9, wherein, Each output terminal (83, 103, 113, 85, 105, 115) of at least two coils (201, 202) is connected to each other, and thus the two coils (201, 202) are connected in parallel.

11. The stator (1) according to claim 10, wherein, The two coils (201 and 202) belong to one phase.

12. A vehicle comprising an electric motor (401) having a stator (1) according to any one of claims 1 to 11.

Images