Stator, motor and vehicle

Abstract

The present application relates to the field of motor technology, and the present application provides a stator, a motor and a vehicle. The stator includes: a stator core, and the stator slot has N slot layers; the first coil group, the second coil group and the third coil group of the stator winding each include a plurality of U-shaped coils, and the second coil group also includes a plurality of conductor structures; each first slot conductor of the U-shaped coil passes through a slot layer of a stator slot; the conductor structure includes a second slot conductor and a second welding conductor connected to each other, and the second slot conductor is arranged in a slot layer of the stator slot; in the stator slot, one of the first slot layer and the Nth slot layer is provided with the first slot conductor of the first coil group, and the other is provided with the first slot conductor of the third coil group, and one of the second slot layer to the N-1th slot layer is provided with the first slot conductor or the second slot conductor of the second coil group. The present application reduces the types of coils of the stator winding and simplifies the winding method of the stator winding.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular, to a stator, a motor and a vehicle. Background Art

[0002] The stator of the motor includes a stator core and a stator winding. The stator winding is wound on the stator core, and the stator winding includes a plurality of coils. There are many types of coils, and the plug-in method of the plurality of coils is complicated. The assembly efficiency of the stator is low, which is not conducive to the automated production and mass production of the product, and the production cost of the product is low. Specifically, the stator core has a stator slot, and the stator slot has a plurality of slot layers along the slot depth direction of the stator slot. The conductor in one slot of the coil passes through a slot layer of a stator slot. There is no regularity in the types of coils plugged into the plurality of slot layers of the stator slot. For example, the coil corresponding to the first slot layer of a stator slot is a first type of coil, and the coil corresponding to the first slot layer of another stator slot is a second type of coil. The coil corresponding to the last slot layer of a stator slot is a third type of coil, and the coil corresponding to the last slot layer of another stator slot is a fourth type of coil. The plug-in method of the plurality of coils is complicated. In this way, more manpower is needed to distinguish the types of coils at different slot layers of the stator slot, which greatly increases the assembly time of the stator. Furthermore, since there is no regularity in the way the multiple coils are plugged in, it increases the difficulty of automated winding of the equipment and cannot meet the needs of mass production. Summary of the invention

[0003] The present application aims to at least solve the technical problem of low stator assembly efficiency existing in the prior art or related art.

[0004] To this end, a first aspect of the present application provides a stator.

[0005] A second aspect of the present application provides an electric motor.

[0006] A third aspect of the present application provides a vehicle.

[0007] In view of this, a first aspect of the present application provides a stator, comprising: a stator core, the stator core is provided with a plurality of stator slots, and along the slot depth direction of the stator slot, the stator slot has N slot layers; a stator winding, wound on the stator core, the stator winding comprises a first coil group, a second coil group and a third coil group, the first coil group, the second coil group and the third coil group each comprise a plurality of U-shaped coils, the second coil group further comprises a plurality of conductor structures; the U-shaped coil comprises two first slot conductors, two first welding conductors and a connecting conductor, the connecting conductor connects the first ends of the two first slot conductors, each first welding conductor is connected to the second end of a first slot conductor, and each first slot conductor passes through a slot layer of a stator slot; the conductor structure comprises the second slots connected to each other Inner conductor and second welding conductor, the second slot conductor is arranged in a slot layer of the stator slot; in the stator slot, one of the first slot layer and the Nth slot layer is provided with the first slot conductor of the first coil group, the other is provided with the first slot conductor of the third coil group, and one of the second slot layer to the N-1th slot layer is provided with the first slot conductor or the second slot conductor of the second coil group; in the U-shaped coil of the first coil group, the two first welding conductors are both bent and arranged along the first direction; in the U-shaped coil of the second coil group, one first welding conductor is bent and arranged along the first direction, and the other first welding conductor is bent and arranged along the second direction; in the U-shaped coil of the third coil group, the two first welding conductors are both bent and arranged along the second direction; wherein the stator winding includes a flat wire winding.

[0008] The present application provides a stator comprising a stator core and a stator winding. The stator winding is wound around the stator core.

[0009] It can be understood that the stator core is provided with a plurality of stator slots, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator.

[0010] The stator winding includes a first coil group, a second coil group and a third coil group. The first coil group includes a plurality of U-shaped coils, the second coil group includes a plurality of U-shaped coils and a plurality of conductor structures. The third coil group includes a plurality of U-shaped coils. Each U-shaped coil includes two first slot conductors, two first welding conductors and a connecting conductor, the two first slot conductors are arranged oppositely and spaced apart, the connecting conductor connects the first ends of the two first slot conductors, each first welding conductor connects the second end of a first slot conductor, each first slot conductor cooperates with a slot layer of a stator slot, and specifically, each first slot conductor is arranged in a slot layer of a stator slot.

[0011] The shapes of the U-shaped coils of any two of the first coil group, the second coil group and the third coil group are different. Specifically, in the U-shaped coil of the first coil group, the two first welding conductors are bent and arranged along the first direction. In the U-shaped coil of the second coil group, one first welding conductor is bent and arranged along the first direction, and the other first welding conductor is bent and arranged along the second direction. In the U-shaped coil of the third coil group, the two first welding conductors are bent and arranged along the second direction. The first direction is different from the second direction. Exemplarily, the first direction is opposite to the second direction.

[0012] Further, along the slot depth direction of the stator slot, the stator slot has N slot layers, and each slot layer is used to accommodate a first slot conductor or a second slot conductor. Specifically, in the stator slot, one of the first slot layer and the Nth slot layer is provided with a first slot conductor of the first coil group, the other of the first slot layer and the Nth slot layer is provided with a first slot conductor of the third coil group, and one of the second slot layer to the N-1th slot layer is provided with a first slot conductor or a second slot conductor of the second coil group. That is, the first slot layer is provided with a first slot conductor of the first coil group, and the Nth slot layer is provided with a first slot conductor of the third coil group. Alternatively, the first slot layer is provided with a first slot conductor of the third coil group, and the Nth slot layer is provided with a first slot conductor of the first coil group. That is to say, among the multiple stator slots, the first slot layer is used to accommodate the first slot conductor of the first coil group or the first slot conductor of the third coil group, the Nth slot layer is used to accommodate the first slot conductor of the third coil group or the first slot conductor of the first coil group, and the second slot layer to the N-1th slot layer are used to accommodate the first slot conductor and the second slot conductor of the second coil group.

[0013] That is to say, the winding positions of the first coil group, the second coil group and the third coil group in the stator slots of the stator core are defined, and the shapes of the first coil group, the second coil group and the third coil group are defined. This setting unifies and simplifies the shapes and winding positions of the first coil group, the second coil group and the third coil group, reduces the types of coils of the stator winding, simplifies the winding method of the stator winding, facilitates winding, is conducive to improving the assembly efficiency of the stator, is conducive to realizing automated production, and thus is conducive to reducing the production cost of the product.

[0014] Exemplarily, the stator winding comprises a flat wire winding.

[0015] In some technical schemes, exemplarily, the plurality of stator slots include a first stator slot and a second stator slot; in the first stator slot, any one of the second slot layer to the N-1th slot layer is provided with a first slot conductor of the second coil group; in the second stator slot, a portion of the slot layers from the second slot layer to the N-1th slot layer is provided with the first slot conductor of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer is provided with a second slot conductor.

[0016] In this technical solution, the types of multiple stator slots of the stator core are divided so that the multiple stator slots include first stator slots and second stator slots, and the types of slot conductors accommodated in the second slot layer to the N-1th slot layer of the first stator slot are different from the types of slot conductors accommodated in the second slot layer to the N-1th slot layer of the second stator slot.

[0017] Specifically, in the first stator slot, any one of the second slot layer to the N-1th slot layer is provided with the first slot conductor of the second coil group. In other words, the second slot layer to the N-1th slot layer of the first stator slot are all used to accommodate the first slot conductor of the second coil group.

[0018] Specifically, in the second stator slots, a portion of the slot layers from the second slot layer to the N-1th slot layer is provided with the first slot conductor of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer is provided with the second slot conductor. That is to say, a portion of the slot layers from the second slot layer to the N-1th slot layer is used to accommodate the first slot conductor, and another portion of the slot layers is used to accommodate the second slot conductor.

[0019] This setting further subdivides the winding position of the second coil group to further unify the winding position of the second coil group while ensuring the performance of the stator. This is conducive to standardizing the winding method of the second coil group, and further conducive to realizing automated production and mass production, which is conducive to reducing the production cost of the product.

[0020] In some technical schemes, exemplarily, in each stator slot, a portion of the slot layers from the second slot layer to the N-1th slot layer are provided with a first slot conductor of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer are provided with a second slot conductor.

[0021] In this technical solution, the winding position of the second coil group in the plurality of stator slots is further limited.

[0022] In each stator slot, a portion of the slot layers from the second slot layer to the N-1th slot layer is provided with a first slot conductor of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer is provided with a second slot conductor. That is, in each stator slot, a portion of the slot layers is used to accommodate the first slot conductor, and another portion of the slot layers is used to accommodate the second slot conductor.

[0023] This setting further subdivides the winding position of the second coil group to further unify the winding position of the second coil group while ensuring the performance of the stator. This is conducive to standardizing the winding method of the second coil group, and further conducive to realizing automated production and mass production, which is conducive to reducing the production cost of the product.

[0024] In some technical schemes, exemplarily, in the U-shaped coil of the second coil group, the slot layer where a first in-slot conductor is located is the nth layer, and the slot layer where another first in-slot conductor is located is the n+1th layer, 2≤n≤N-1, n is an even number, and N is an even number greater than or equal to 6; the conductor structure is connected to a U-shaped coil of the second coil group, a first in-slot conductor and a first welding conductor of the U-shaped coil connected to the conductor structure are respectively recorded as a reference in-slot conductor and a reference welding conductor, the reference welding conductor is connected to the reference in-slot conductor, the slot layer where the second in-slot conductor of the conductor structure is located is the same as the slot layer where the reference in-slot conductor is located, and the bending direction of the second welding conductor of the conductor structure is the same as the bending direction of the reference welding conductor.

[0025] In this technical solution, along the slot depth of the stator slot, the stator slot has multiple slot layers, and each slot layer is used to accommodate a slot conductor. The U-shaped coil of the second coil group includes two first slot conductors, which are arranged oppositely and at intervals, and each first slot conductor cooperates with a slot layer of a stator slot. Specifically, each first slot conductor is arranged in a slot layer of a stator slot. In the U-shaped coil of the second coil group, the slot layer where one first slot conductor is located is the nth layer, and the slot layer where another first slot conductor is located is the n+1th layer. That is to say, along the slot depth direction of the stator slot, the slot layers where the two first slot conductors of the U-shaped coil of the second coil group are located are different, and the slot layers where the two first slot conductors of the U-shaped coil of the second coil group are located are adjacent layers. It can be seen that the insertion and winding method of the U-shaped coil of the second coil group on the stator core is adjacent layer insertion. That is, any U-shaped coil in the second coil group is adjacent layer insertion.

[0026] That is, the matching structure of the second coil group of the stator winding and the stator core is reasonably set, so that each U-shaped coil of the second coil group is wound on the stator core in an adjacent layer plug-in manner, so that the inner diameter of the stator winding can be increased when the outer diameter of the stator winding remains unchanged, and the outer diameter of the stator winding can be reduced when the inner diameter of the stator winding remains unchanged. In other words, this setting can reduce the size of the stator winding in the radial direction of the stator.

[0027] It is understandable that the motor also includes an oil injection ring. In the related art, the size of the stator winding in the radial direction of the stator is too large, which will occupy the installation space of the oil injection ring. In order to install the oil injection ring in a limited space, the wall thickness and material input of the oil injection ring are reduced accordingly, which leads to low structural strength and rigidity of the oil injection ring. When the motor is working, the oil injection ring is easy to be damaged, and the service life of the oil injection ring is short, which increases the repair and maintenance cost of the motor.

[0028] The present application reasonably arranges the matching structure of the stator winding and the stator core. Under the condition that the outer dimensions of the motor remain unchanged, the internal space occupancy rate of the stator winding to the motor can be reduced along the radial direction of the stator, and the installation space of the motor's oil injection ring can be increased. In this way, the oil injection ring can improve its own structural strength and rigidity by increasing the amount of material used, reduce the probability of damage to the oil injection ring due to its own low structural strength and rigidity, which is beneficial to extending the service life of the oil injection ring and reducing the repair and maintenance costs of the motor.

[0029] In addition, this structural arrangement makes it possible to directly plug in the stator winding in the same way when it is necessary to increase the number of layers of the second coil group in the stator slot, without making any additional changes to the plug-in method. In other words, the plug-in method of the stator winding of the present application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator, facilitating the realization of automated production, and further conducive to reducing the production cost of the product.

[0030] Further, the conductor structure is connected to a U-shaped coil of the second coil group. A first in-slot conductor and a first welding conductor of the U-shaped coil connected to the conductor structure are respectively recorded as a reference in-slot conductor and a reference welding conductor. The reference welding conductor is connected to the reference in-slot conductor. The slot layer where the second in-slot conductor of the conductor structure is located is the same as the slot layer where the reference in-slot conductor is located, and the bending direction of the second welding conductor of the conductor structure is the same as the bending direction of the reference welding conductor. That is, the bending direction of the second welding conductor of the conductor structure is defined. This setting further subdivides the bending direction of the second welding conductor of the conductor structure of the second coil group, so as to further unify the winding position of the second coil group while ensuring the performance of the stator, so as to standardize the winding method of the second coil group, and then facilitate the realization of automated production and mass production, and reduce the production cost of the product.

[0031] In some technical schemes, exemplarily, the stator winding includes K phase windings, each phase winding includes a winding branches, and the K phase windings are divided into a first coil group, a second coil group and a third coil group; the number of poles of the stator winding is 6, and the number of conductor structures is 6×a.

[0032] In this technical solution, the specific parameters of the stator are further refined.

[0033] The stator winding includes K phase windings, each phase winding includes a winding branches, and the K phase windings are divided into a first coil group, a second coil group and a third coil group.

[0034] The number of poles of the stator winding is 6, and the number of conductor structures is 6×a.

[0035] In some technical solutions, illustratively, the slot layers where the 3×a second slot conductors are located are all the second layers, and the slot layers where the 3×a second slot conductors are located are all the third layers.

[0036] In this technical solution, the arrangement position of the conductor structure is further limited.

[0037] Specifically, the slot layers where the 3×a second slot conductors are located are all the second layers, and the slot layers where the 3×a second slot conductors are located are all the third layers.

[0038] It can be understood that at least a portion of the plurality of conductor structures is used to connect to the busbar of the motor. By defining the arrangement positions of the plurality of conductor structures, the arrangement positions of the structures to which the busbar is connected can be indirectly defined.

[0039] Specifically, the slot layers where the 3×a second slot conductors are located are all the second layer, and the slot layers where the 3×a second slot conductors are located are all the third layer. That is, the positions where the busbar is connected to the conductor structure are also relatively uniform, thus simplifying the structure of the busbar, helping to reduce the difficulty of processing the busbar, helping to improve the processing efficiency of the busbar, and helping to reduce the production costs of the busbar and the motor.

[0040] It can be understood that the slot layer where any second in-slot conductor among the 3×a second in-slot conductors is located is the second layer.

[0041] It can be understood that the slot layer where any second in-slot conductor among the 3×a second in-slot conductors is located is the third layer.

[0042] In some technical solutions, illustratively, the slot layers where the 3×a second slot conductors are located are all the N-2th layers, and the slot layers where the 3×a second slot conductors are located are all the N-1th layers.

[0043] In this technical solution, the arrangement position of the conductor structure is further limited.

[0044] Specifically, the slot layers where the 3×a second slot conductors are located are all the N-2th layers, and the slot layers where the 3×a second slot conductors are located are all the N-1th layers.

[0045] It can be understood that at least a portion of the plurality of conductor structures is used to connect to the busbar of the motor. By defining the arrangement positions of the plurality of conductor structures, the arrangement positions of the structures to which the busbar is connected can be indirectly defined.

[0046] Specifically, the slot layers where the 3×a second slot conductors are located are all the N-2th layer, and the slot layers where the 3×a second slot conductors are located are all the N-1th layer. That is, the positions where the busbar is connected to the conductor structure are also relatively uniform, thus simplifying the structure of the busbar, helping to reduce the difficulty of processing the busbar, helping to improve the processing efficiency of the busbar, and helping to reduce the production costs of the busbar and the motor.

[0047] It can be understood that the slot layer where any second in-slot conductor among the 3×a second in-slot conductors is located is the N-2th layer.

[0048] It can be understood that the slot layer where any second in-slot conductor among the 3×a second in-slot conductors is located is the N-1th layer.

[0049] In some technical schemes, exemplarily, any one of the 3×a second slot conductors is an incoming terminal of a winding branch, and any one of the 3×a second slot conductors is an outgoing terminal of a winding branch; the slot layers where the 3×a incoming terminals are located are the same layer, and the slot layers where the 3×a outgoing terminals are located are the same layer.

[0050] In this technical solution, the arrangement position of the conductor structure is further limited.

[0051] Any one of the 3×a conductors in the second slot is an incoming terminal of a winding branch, and any one of the 3×a conductors in the second slot is an outgoing terminal of a winding branch.

[0052] At least a portion of the conductor structures in the plurality of conductor structures is used to connect to the busbar of the motor. By defining the arrangement positions of the conductors in the second slots of the plurality of conductor structures, the arrangement positions of the structures to which the busbar is connected can be indirectly defined.

[0053] The slots where the 3×a incoming terminals are located are in the same layer, and the slots where the 3×a outgoing terminals are located are in the same layer. In this way, the connection positions of the busbar and the conductor structure are also more uniform, which simplifies the structure of the busbar, helps to reduce the difficulty of busbar processing, helps to improve the processing efficiency of the busbar, and helps to reduce the production cost of the busbar and the motor.

[0054] In some technical solutions, illustratively, K=3, a=3; or K=3, a=1.

[0055] In this technical solution, the specific parameters of the stator are further refined.

[0056] K=3, a=3. Or, K=3, or a=1.

[0057] In some technical solutions, exemplarily, when a=3, in the phase winding, a winding branches are connected in series; when a=3, K=3, the three phase windings are connected in star or triangle; when a=1, K=3, the three phase windings are connected in triangle.

[0058] In this technical solution, the specific parameters of the stator are further refined.

[0059] When a=3, in the phase winding, a winding branches are connected in series.

[0060] When a=3, K=3, the three phase windings are connected in star shape. Alternatively, when a=3, K=3, the three phase windings are connected in delta shape.

[0061] When a=1, K=3, the three phase windings are connected in a triangle.

[0062] In some technical solutions, illustratively, the number of stator slots spanned by the first welding conductor and the second welding conductor is equal.

[0063] In this technical solution, the structures of the first welding conductor and the second welding conductor are further defined.

[0064] The first weld conductor and the second weld conductor span an equal number of stator slots.

[0065] This arrangement is conducive to simplifying the winding process of the stator winding, reducing the winding steps of the stator winding, improving the assembly efficiency of the product, and reducing the production cost of the product.

[0066] In some technical solutions, exemplarily, the pitch of the U-shaped coils in any one of the first coil group and the second coil group is 9, the pitch of a part of the U-shaped coils in the third coil group is 7, and the pitch of another part of the U-shaped coils in the third coil group is 8.

[0067] In this technical solution, the structures of the first coil group, the second coil group and the third coil group are further defined.

[0068] Specifically, the pitch of the U-shaped coil of any one of the first coil group and the second coil group is 9. That is, the pitch of the U-shaped coil of the first coil group is 9, and the pitch of the U-shaped coil of the second coil group is 9.

[0069] Specifically, a pitch of a portion of the U-shaped coils in the third coil group is 7, and a pitch of another portion of the U-shaped coils in the third coil group is 8.

[0070] This setting further unifies the winding method of the stator winding, which is simpler, easier to operate, and conducive to mass production.

[0071] For example, in a U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the twelfth stator slot, and the pitch of the U-shaped coil is 9.

[0072] For example, in the U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the tenth stator slot, and the pitch of the U-shaped coil is 7.

[0073] For example, in the U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the eleventh stator slot, and the pitch of the U-shaped coil is 8.

[0074] In some technical solutions, exemplarily, the pitch of the U-shaped coils in any one of the second coil group and the third coil group is 9, the pitch of a part of the U-shaped coils in the first coil group is 7, and the pitch of another part of the U-shaped coils in the first coil group is 8.

[0075] In this technical solution, the structures of the first coil group, the second coil group and the third coil group are further defined.

[0076] Specifically, the pitch of the U-shaped coil of any one of the second coil group and the third coil group is 9. That is, the pitch of the U-shaped coil of the second coil group is 9, and the pitch of the U-shaped coil of the third coil group is 9.

[0077] Specifically, a pitch of a portion of the U-shaped coils in the first coil group is 7, and a pitch of another portion of the U-shaped coils in the first coil group is 8.

[0078] This setting further unifies the winding method of the stator winding, which is simpler, easier to operate, and conducive to mass production.

[0079] For example, in a U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the twelfth stator slot, and the pitch of the U-shaped coil is 9.

[0080] For example, in the U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the tenth stator slot, and the pitch of the U-shaped coil is 7.

[0081] For example, in the U-shaped coil, the stator slot where the conductor in one first slot is located is the third stator slot, and the stator slot where the conductor in another first slot is located is the eleventh stator slot, and the pitch of the U-shaped coil is 8.

[0082] A second aspect of the present application provides a motor, comprising: a stator as in the first aspect.

[0083] Since the motor provided in the present application includes the stator as in the first aspect, it has all the beneficial effects of the above-mentioned stator, which will not be described one by one here.

[0084] A third aspect of the present application provides a vehicle, comprising: a motor as in the second aspect.

[0085] The vehicle provided in the present application includes the motor as in the second aspect and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0086] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0087] The vehicle may also be a fuel-powered vehicle.

[0088] The motor of the present application is a driving motor of a vehicle, which is used to provide power to the vehicle.

[0089] Additional aspects and advantages of the present application will become apparent in the following description or will be understood through the practice of the present application. In the present application, by defining the structure of the stator winding, the stator winding includes a first coil group, a second coil group, and a third coil group. The winding positions of the first coil group, the second coil group, and the third coil group in the stator slots of the stator core are defined, and the shapes of the first coil group, the second coil group, and the third coil group are defined. In other words, the shapes and winding positions of the first coil group, the second coil group, and the third coil group are unified and simplified, the types of coils of the stator winding are reduced, the winding method of the stator winding is simplified, and the winding is convenient, which is conducive to improving the assembly efficiency of the stator, and is conducive to realizing automated production, thereby helping to reduce the production cost of the product. Furthermore, the U-shaped coil of the second coil group is wound on the stator core in an adjacent layer plug-in manner. Under the condition that the outer dimensions of the motor remain unchanged, the internal space occupancy rate of the stator winding on the motor can be reduced along the radial direction of the stator, and the installation space of the motor's oil injection ring can be increased. In this way, the oil injection ring can improve its own structural strength and rigidity by increasing the amount of material used, reduce the probability of damage to the oil injection ring due to its own low structural strength and rigidity, help to extend the service life of the oil injection ring, and help to reduce the repair and maintenance costs of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0091] Figure 1 A schematic structural diagram of a stator according to an embodiment of the present application is shown;

[0092] Figure 2A schematic structural diagram of a stator core and a first coil group according to an embodiment of the present application is shown;

[0093] Figure 3 A schematic structural diagram of a stator core and a second coil group according to an embodiment of the present application is shown;

[0094] Figure 4 A schematic structural diagram of a stator core and a third coil group according to an embodiment of the present application is shown;

[0095] Figure 5 A partial structural schematic diagram of a first coil assembly according to an embodiment of the present application is shown;

[0096] Figure 6 A partial structural schematic diagram of a second coil assembly according to an embodiment of the present application is shown;

[0097] Figure 7 A partial structural schematic diagram of a third coil assembly according to an embodiment of the present application is shown;

[0098] Figure 8 A schematic structural diagram of a stator core and a U-shaped coil according to an embodiment of the present application is shown;

[0099] Fig. 9 A schematic structural diagram of a stator core and a U-shaped coil according to an embodiment of the present application is shown;

[0100] Fig.10 A partial structural schematic diagram of a stator according to an embodiment of the present application is shown;

[0101] Fig.11 A schematic diagram of winding a first winding branch of a U-phase winding of a first embodiment of the present application is shown;

[0102] Fig.12 for Fig.11 A partial enlarged view of T1 of the first winding branch of the U-phase winding shown;

[0103] Fig.13 for Fig.11 A partial enlarged view of T2 of the first winding branch of the U-phase winding shown;

[0104] Fig.14 for Fig.11 A partial enlarged view of T3 of the first winding branch of the U-phase winding shown;

[0105] Fig.15 A schematic diagram of winding the second winding branch of the U-phase winding of the first embodiment of the present application is shown;

[0106] Fig.16 for Fig.15A partial enlarged view of T4 of the second winding branch of the U-phase winding shown;

[0107] Fig.17 for Fig.15 A partial enlarged view of T5 of the second winding branch of the U-phase winding shown;

[0108] Fig.18 for Fig.15 A partial enlarged view of T6 of the second winding branch of the U-phase winding shown;

[0109] Fig.19 A schematic diagram of winding the third winding branch of the U-phase winding of the first embodiment of the present application is shown;

[0110] Fig. 20 for Fig.19 A partial enlarged view of T7 of the third winding branch of the U-phase winding shown;

[0111] Fig.21 for Fig.19 A partial enlarged view of T8 of the third winding branch of the U-phase winding shown;

[0112] Fig. 22 for Fig.19 A partial enlarged view of T9 of the third winding branch of the U-phase winding shown;

[0113] Fig.23 A schematic diagram showing the structure of the star connection of the three-phase windings of the first embodiment of the present application is shown;

[0114] Fig.24 A schematic structural diagram showing the angular connection of the three-phase windings of the first embodiment of the present application is shown;

[0115] Fig.25 A schematic diagram showing the winding of three winding branches of the U-phase winding in series connection according to the second embodiment of the present application is shown;

[0116] Fig.26 for Fig.25 A partial enlarged view of T10 where three winding branches of the U-phase winding are connected in series is shown;

[0117] Fig. 27 for Fig.25 A partial enlarged view of T11 where three winding branches of the U-phase winding are connected in series is shown;

[0118] Fig.28 for Fig.25 A partial enlarged view of T12 where three winding branches of the U-phase winding are connected in series is shown;

[0119] Fig.29A schematic diagram of winding a first winding branch of a U-phase winding according to a third embodiment of the present application is shown;

[0120] Fig.30 for Fig.29 A partial enlarged view of T13 of the first winding branch of the U-phase winding shown;

[0121] Fig.31 for Fig.29 A partial enlarged view of T14 of the first winding branch of the U-phase winding shown;

[0122] Fig.32 for Fig.29 A partial enlarged view of T15 of the first winding branch of the U-phase winding shown;

[0123] Fig.33 A schematic diagram showing the winding of the second winding branch of the U-phase winding of the third embodiment of the present application is shown;

[0124] Fig.34 for Fig.33 A partial enlarged view of T16 of the second winding branch of the U-phase winding shown;

[0125] Fig.35 for Fig.33 A partial enlarged view of T17 of the second winding branch of the U-phase winding shown;

[0126] Fig.36 for Fig.33 A partial enlarged view of T18 of the second winding branch of the U-phase winding shown;

[0127] Fig.37 A schematic diagram showing the winding of the third winding branch of the U-phase winding of the third embodiment of the present application is shown;

[0128] Fig.38 for Fig.37 A partial enlarged view of T19 of the third winding branch of the U-phase winding shown;

[0129] Fig.39 for Fig.37 A partial enlarged view of T20 of the third winding branch of the U-phase winding shown;

[0130] Fig.40 for Fig.37 A partial enlarged view of T21 of the third winding branch of the U-phase winding shown;

[0131] Fig.41 A schematic diagram showing the winding of three winding branches of the U-phase winding in series connection according to the fourth embodiment of the present application is shown;

[0132] Fig.42 for Fig.41 A partial enlarged view of T22 where three winding branches of the U-phase winding are connected in series;

[0133] Fig.43 for Fig.41 A partial enlarged view of T23 where three winding branches of the U-phase winding are connected in series;

[0134] Fig.44 for Fig.41 A partial enlarged view of T24 where the three winding branches of the U-phase winding are connected in series is shown.

[0135] in, Figures 1 to 44 The corresponding relationship between the reference numerals and component names in the figure is:

[0136] 1 stator, 10 stator core, 100 stator slot, 100a first stator slot, 100b second stator slot, 110 slot layer, 20 stator winding, 21 first coil group, 22 second coil group, 23 third coil group, 24 phase winding, 210 U-shaped coil, 212 conductor in the first slot, 214 first welding conductor, 216 connecting conductor, 220 conductor structure, 222 conductor in the second slot, 224 second welding conductor, 230 winding branch, S1 direction is circumferential direction, S2 direction is slot depth direction, S3 direction is first direction, S4 direction is second direction, S5 direction is radial direction. DETAILED DESCRIPTION

[0137] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0138] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0139] Refer to the following Figures 1 to 44 The stator 1 , the motor and the vehicle according to some embodiments of the present application are described.

[0140] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 and Fig.10 As shown, according to some embodiments of the present application, a stator 1 is proposed, and the stator 1 includes a stator core 10 and a stator winding 20 .

[0141] The stator core 10 is provided with a plurality of stator slots 100 .

[0142] The stator slot 100 has N slot layers 110 along the slot depth direction of the stator slot 100 .

[0143] The stator winding 20 is wound around the stator core 10 .

[0144] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the stator winding 20 includes a first coil group 21 , a second coil group 22 and a third coil group 23 .

[0145] The first coil group 21 , the second coil group 22 , and the third coil group 23 each include a plurality of U-shaped coils 210 .

[0146] The second coil assembly 22 further includes a plurality of conductor structures 220 .

[0147] like Figure 5 , Figure 6 and Figure 7 As shown, the U-shaped coil 210 includes two first in-slot conductors 212 , two first welding conductors 214 and a connecting conductor 216 .

[0148] The connecting conductor 216 connects first ends of the two first in-slot conductors 212 .

[0149] Each first welding conductor 214 is connected to the second end of one of the first in-slot conductors 212 .

[0150] Each first in-slot conductor 212 passes through a slot layer 110 of a stator slot 100 .

[0151] like Figure 6 As shown, the conductor structure 220 includes a second in-slot conductor 222 and a second welding conductor 224 connected to each other.

[0152] The second in-slot conductor 222 is provided in one slot layer 110 of the stator slot 100 .

[0153] In the stator slot 100 , one of the first slot layer 110 and the N-th slot layer 110 is provided with the first in-slot conductor 212 of the first coil group 21 , and the other is provided with the first in-slot conductor 212 of the third coil group 23 .

[0154] One of the second slot layer 110 to the N−1th slot layer 110 is provided with the first in-slot conductor 212 or the second in-slot conductor 222 of the second coil group 22 .

[0155] like Figure 5As shown, in the U-shaped coil 210 of the first coil group 21 , the two first welding conductors 214 are both bent and arranged along the first direction.

[0156] like Figure 6 As shown, in the U-shaped coil 210 of the second coil group 22, one first welding conductor 214 is bent along a first direction, and another first welding conductor 214 is bent along a second direction.

[0157] like Figure 7 As shown, in the U-shaped coil 210 of the third coil group 23, the two first welding conductors 214 are both bent and arranged along the second direction.

[0158] The stator winding 20 includes a flat wire winding.

[0159] The present application provides a stator 1 including a stator core 10 and a stator winding 20. The stator winding 20 is wound around the stator core 10.

[0160] It can be understood that the stator core 10 is provided with a plurality of stator slots 100 , and the plurality of stator slots 100 are arranged at intervals along the circumferential direction of the stator 1 .

[0161] The stator winding 20 includes a first coil group 21, a second coil group 22 and a third coil group 23. The first coil group 21 includes a plurality of U-shaped coils 210, and the second coil group 22 includes a plurality of U-shaped coils 210 and a plurality of conductor structures 220. The third coil group 23 includes a plurality of U-shaped coils 210. Each U-shaped coil 210 includes two first slot conductors 212, two first welding conductors 214 and a connecting conductor 216. The two first slot conductors 212 are arranged oppositely and spaced apart, the connecting conductor 216 connects the first ends of the two first slot conductors 212, each first welding conductor 214 connects the second end of a first slot conductor 212, and each first slot conductor 212 cooperates with a slot layer 110 of a stator slot 100. Specifically, each first slot conductor 212 is disposed in a slot layer 110 of a stator slot 100.

[0162] The shapes of the U-shaped coils 210 of any two of the first coil group 21, the second coil group 22, and the third coil group 23 are different. Specifically, in the U-shaped coil 210 of the first coil group 21, the two first welding conductors 214 are bent and arranged along the first direction. In the U-shaped coil 210 of the second coil group 22, one first welding conductor 214 is bent and arranged along the first direction, and the other first welding conductor 214 is bent and arranged along the second direction. In the U-shaped coil 210 of the third coil group 23, the two first welding conductors 214 are bent and arranged along the second direction. Wherein, the first direction is different from the second direction. Exemplarily, the first direction is opposite to the second direction.

[0163] Further, along the slot depth direction of the stator slot 100, the stator slot 100 has N slot layers 110, and each slot layer 110 is used to accommodate a first slot conductor 212 or a second slot conductor 222. Specifically, in the stator slot 100, one of the first slot layer 110 and the Nth slot layer 110 is provided with the first slot conductor 212 of the first coil group 21, the other of the first slot layer 110 and the Nth slot layer 110 is provided with the first slot conductor 212 of the third coil group 23, and one of the second slot layer 110 to the N-1th slot layer 110 is provided with the first slot conductor 212 or the second slot conductor 222 of the second coil group 22. That is, the first slot layer 110 is provided with the first slot conductor 212 of the first coil group 21, and the Nth slot layer 110 is provided with the first slot conductor 212 of the third coil group 23. Alternatively, the first slot layer 110 is provided with the first slot conductor 212 of the third coil group 23, and the Nth slot layer 110 is provided with the first slot conductor 212 of the first coil group 21. That is to say, among the plurality of stator slots 100, the first slot layer 110 is used to accommodate the first slot conductor 212 of the first coil group 21 or the first slot conductor 212 of the third coil group 23, the Nth slot layer 110 is used to accommodate the first slot conductor 212 of the third coil group 23 or the first slot conductor 212 of the first coil group 21, and the second slot layer 110 to the N-1th slot layer 110 are used to accommodate the first slot conductor 212 and the second slot conductor 222 of the second coil group 22.

[0164] That is to say, the winding positions of the first coil group 21, the second coil group 22 and the third coil group 23 in the stator slot 100 of the stator core 10 are defined, and the shapes of the first coil group 21, the second coil group 22 and the third coil group 23 are defined. This setting unifies and simplifies the shapes and winding positions of the first coil group 21, the second coil group 22 and the third coil group 23, reduces the types of coils of the stator winding 20, simplifies the winding method of the stator winding 20, facilitates the winding, is conducive to improving the assembly efficiency of the stator 1, is conducive to realizing automated production, and thus is conducive to reducing the production cost of the product.

[0165] Illustratively, N=8, N=10, and N=12, etc., which are not listed here one by one.

[0166] Exemplarily, the stator winding 20 includes a flat wire winding.

[0167] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: Figure 8 As shown, the plurality of stator slots 100 include a first stator slot 100 a and a second stator slot 100 b .

[0168] In the first stator slot 100 a , any one of the second slot layer 110 to the (N−1)th slot layer 110 is provided with a first in-slot conductor 212 of the second coil group 22 .

[0169] In the second stator slot 100 b , a portion of the slot layers 110 from the second slot layer 110 to the N−1th slot layer 110 are provided with the first slot conductor 212 of the second coil group 22 , and another portion of the slot layers 110 from the second slot layer 110 to the N−1th slot layer 110 are provided with the second slot conductor 222 .

[0170] In this embodiment, the types of the multiple stator slots 100 of the stator core 10 are divided, so that the multiple stator slots 100 include a first stator slot 100a and a second stator slot 100b, and the types of the slot conductors accommodated in the second slot layer 110 to the N-1th slot layer 110 of the first stator slot 100a are different from the types of the slot conductors accommodated in the second slot layer 110 to the N-1th slot layer 110 of the second stator slot 100b.

[0171] Specifically, in the first stator slot 100a, any one of the second slot layer 110 to the N-1th slot layer 110 is provided with the first slot conductor 212 of the second coil assembly 22. In other words, the second slot layer 110 to the N-1th slot layer 110 of the first stator slot 100a are all used to accommodate the first slot conductor 212 of the second coil assembly 22.

[0172] Specifically, in the second stator slot 100b, a portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with the first slot conductor 212 of the second coil group 22, and another portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with the second slot conductor 222. In other words, a portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is used to accommodate the first slot conductor 212, and another portion of the slot layers 110 is used to accommodate the second slot conductor 222.

[0173] This setting further subdivides the winding position of the second coil group 22 to further unify the winding position of the second coil group 22 while ensuring the performance of the stator 1. This is conducive to standardizing the winding method of the second coil group 22, and further conducive to realizing automated production and mass production, which is conducive to reducing the production cost of the product.

[0174] The present embodiment provides a stator 1. In addition to the technical features of the above embodiments, the present embodiment further includes the following technical features: in each stator slot 100, a portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with a first slot conductor 212 of the second coil group 22, and another portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with a second slot conductor 222.

[0175] In this embodiment, the winding positions of the second coil group 22 within the plurality of stator slots 100 are further defined.

[0176] In each stator slot 100, a portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with the first slot conductor 212 of the second coil group 22, and another portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with the second slot conductor 222. That is, in each stator slot 100, a portion of the slot layers 110 is used to accommodate the first slot conductor 212, and another portion of the slot layers 110 is used to accommodate the second slot conductor 222.

[0177] This setting further subdivides the winding position of the second coil group 22 to further unify the winding position of the second coil group 22 while ensuring the performance of the stator 1. This is conducive to standardizing the winding method of the second coil group 22, and further conducive to realizing automated production and mass production, which is conducive to reducing the production cost of the product.

[0178] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: in the U-shaped coil 210 of the second coil group 22, the slot layer 110 where a first slot conductor 212 is located is the nth layer.

[0179] The slot layer 110 where another first in-slot conductor 212 is located is the (n+1)th layer.

[0180] 2≤n≤N-1, n is an even number, and N is an even number greater than or equal to 6.

[0181] The conductor structure 220 is connected to a U-shaped coil 210 of the second coil assembly 22 .

[0182] A first slot conductor 212 and a first welding conductor 214 of the U-shaped coil 210 connected to the conductor structure 220 are denoted as a reference slot conductor and a reference welding conductor, respectively.

[0183] The reference welded conductor is connected to the conductor in the reference slot.

[0184] The second in-slot conductor 222 of the conductor structure 220 is located in the same slot layer 110 as the reference in-slot conductor, and the bending direction of the second welding conductor 224 of the conductor structure 220 is the same as the bending direction of the reference welding conductor.

[0185] In this embodiment, the stator slot 100 has a plurality of slot layers 110 along the slot depth of the stator slot 100, and each slot layer 110 is used to accommodate a slot conductor. The U-shaped coil 210 of the second coil group 22 includes two first slot conductors 212, which are arranged opposite to each other and spaced apart, and each first slot conductor 212 matches with a slot layer 110 of a stator slot 100. Specifically, each first slot conductor 212 is disposed in a slot layer 110 of a stator slot 100. In the U-shaped coil 210 of the second coil group 22, the slot layer 110 where one first slot conductor 212 is located is the nth layer, and the slot layer 110 where another first slot conductor 212 is located is the n+1th layer, that is, along the slot depth direction of the stator slot 100, the slot layers 110 where the two first slot conductors 212 of the U-shaped coil 210 of the second coil group 22 are located are different, and the slot layers 110 where the two first slot conductors 212 of the U-shaped coil 210 of the second coil group 22 are located are adjacent layers. It can be seen that the insertion and winding method of the U-shaped coil 210 of the second coil group 22 on the stator core 10 is adjacent layer insertion. That is, any U-shaped coil 210 in the second coil group 22 is adjacent layer insertion.

[0186] That is, the matching structure of the second coil group 22 of the stator winding 20 and the stator core 10 is reasonably set, so that each U-shaped coil 210 of the second coil group 22 is wound on the stator core 10 in an adjacent layer plug-in manner, so that the inner diameter of the stator winding 20 can be increased when the outer diameter of the stator winding 20 remains unchanged, and the outer diameter of the stator winding 20 can be reduced when the inner diameter of the stator winding 20 remains unchanged. In other words, this setting can reduce the size of the stator winding 20 in the radial direction of the stator 1.

[0187] It is understandable that the motor also includes an oil injection ring. In the related art, the size of the stator winding in the radial direction of the stator is too large, which will occupy the installation space of the oil injection ring. In order to install the oil injection ring in a limited space, the wall thickness and material input of the oil injection ring are reduced accordingly, which leads to low structural strength and rigidity of the oil injection ring. When the motor is working, the oil injection ring is easy to be damaged, and the service life of the oil injection ring is short, which increases the repair and maintenance cost of the motor.

[0188] The present application reasonably arranges the matching structure of the stator winding 20 and the stator core 10. Under the condition that the outer dimensions of the motor remain unchanged, the internal space occupancy rate of the stator winding 20 to the motor can be reduced along the radial direction of the stator 1, and the installation space of the motor's oil injection ring can be increased. In this way, the oil injection ring can improve its own structural strength and rigidity by increasing the amount of material used, reduce the probability of damage to the oil injection ring due to its own low structural strength and rigidity, help to extend the service life of the oil injection ring, and help to reduce the repair and maintenance costs of the motor.

[0189] In addition, this structural arrangement makes it possible to directly plug in the stator winding 20 in the same plug-in manner when it is necessary to increase the number of layers of the second coil group 22 in the stator slot 100, without making any additional changes to the plug-in manner. In other words, the plug-in method of the stator winding 20 of the present application is more flexible and convenient for winding, which is beneficial to improving the assembly efficiency of the stator 1, facilitating automated production, and further beneficial to reducing the production cost of the product.

[0190] Further, the conductor structure 220 is connected to a U-shaped coil 210 of the second coil group 22. A first in-slot conductor 212 and a first welding conductor 214 of the U-shaped coil 210 connected to the conductor structure 220 are respectively recorded as a reference in-slot conductor and a reference welding conductor. The reference welding conductor is connected to the reference in-slot conductor. The slot layer 110 where the second in-slot conductor 222 of the conductor structure 220 is located is the same as the slot layer 110 where the reference in-slot conductor is located (for example, the slot layer 110 where the second in-slot conductor 222 of the conductor structure 220 is located is the nth layer, and the slot layer 110 where the reference in-slot conductor is located is the nth layer), and the bending direction of the second welding conductor 224 of the conductor structure 220 is the same as the bending direction of the reference welding conductor. That is, the bending direction of the second welding conductor 224 of the conductor structure 220 is defined. This setting further subdivides the bending direction of the second welding conductor 224 of the conductor structure 220 of the second coil group 22, so as to further unify the winding position of the second coil group 22 while ensuring the performance of the stator 1. This is conducive to standardizing the winding method of the second coil group 22, and further conducive to realizing automated production and mass production, and helping to reduce the production cost of the product.

[0191] This embodiment provides a stator 1 . In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the stator winding 20 includes K phase windings 24 .

[0192] Each phase winding 24 includes a winding branches 230 .

[0193] The K phase windings 24 are divided into a first coil group 21 , a second coil group 22 , and a third coil group 23 .

[0194] The number of poles of the stator winding 20 is six.

[0195] The number of conductor structures 220 is 6×a.

[0196] In this embodiment, specific parameters of the stator 1 are further refined.

[0197] The stator winding 20 includes K phase windings 24 , each phase winding 24 includes a winding branches 230 , and the K phase windings 24 are divided into a first coil group 21 , a second coil group 22 and a third coil group 23 .

[0198] The number of poles of the stator winding 20 is 6, and the number of the conductor structures 220 is 6×a.

[0199] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the slot layers 110 where the 3×a second slot conductors 222 are located are all second layers.

[0200] The slot layers 110 where the 3×a second slot conductors 222 are located are all third layers.

[0201] In this embodiment, the arrangement position of the conductor structure 220 is further defined.

[0202] Specifically, the slot layers 110 where the 3×a second slot conductors 222 are located are all the second layers, and the slot layers 110 where the 3×a second slot conductors 222 are located are all the third layers.

[0203] It is understandable that at least a portion of the conductor structures 220 are used to connect to the busbar of the motor. By defining the arrangement positions of the conductor structures 220, the arrangement positions of the structures to which the busbar is connected can be indirectly defined.

[0204] Specifically, the slot layers 110 where the 3×a second slot conductors 222 are located are all the second layer, and the slot layers 110 where the 3×a second slot conductors 222 are located are all the third layer. That is, the connection positions of the busbar and the conductor structure 220 are also relatively uniform, thus simplifying the structure of the busbar, helping to reduce the difficulty of processing the busbar, helping to improve the processing efficiency of the busbar, and helping to reduce the production costs of the busbar and the motor.

[0205] It can be understood that the slot layer 110 where any second slot conductor 222 among the 3×a second slot conductors 222 is located is the second layer.

[0206] It can be understood that the slot layer 110 where any second slot conductor 222 among the 3×a second slot conductors 222 is located is the third layer.

[0207] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the slot layers 110 where the 3×a second slot conductors 222 are located are all N-2 layers.

[0208] The slot layers 110 where the 3×a second slot conductors 222 are located are all N-1th layers.

[0209] In this embodiment, the arrangement position of the conductor structure 220 is further defined.

[0210] Specifically, the slot layers 110 where the 3×a second slot conductors 222 are located are all the N-2th layers, and the slot layers 110 where the 3×a second slot conductors 222 are located are all the N-1th layers.

[0211] It is understandable that at least a portion of the conductor structures 220 are used to connect to the busbar of the motor. By defining the arrangement positions of the conductor structures 220, the arrangement positions of the structures to which the busbar is connected can be indirectly defined.

[0212] Specifically, the slot layer 110 where the 3×a second slot conductors 222 are located is the N-2th layer, and the slot layer 110 where the 3×a second slot conductors 222 are located is the N-1th layer. That is, the connection positions of the busbar and the conductor structure 220 are also relatively uniform, thus simplifying the structure of the busbar, helping to reduce the difficulty of processing the busbar, helping to improve the processing efficiency of the busbar, and helping to reduce the production costs of the busbar and the motor.

[0213] It can be understood that the slot layer 110 where any second slot conductor 222 among the 3×a second slot conductors 222 is located is the N-2th layer.

[0214] It can be understood that the slot layer 110 where any second slot conductor 222 among the 3×a second slot conductors 222 is located is the N-1th layer.

[0215] This embodiment provides a stator 1 . In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: any one of the 3×a second slot conductors 222 is an incoming terminal of a winding branch 230 .

[0216] Any one of the 3×a second slot conductors 222 is an outlet terminal of one winding branch 230 .

[0217] The slot layer 110 where the 3×a incoming terminals are located is the same layer.

[0218] The slot layer 110 where the 3×a outgoing terminals are located is the same layer.

[0219] In this embodiment, the arrangement position of the conductor structure 220 is further defined.

[0220] Any one of the 3×a second slot conductors 222 is an incoming terminal of a winding branch 230 , and any one of the 3×a second slot conductors 222 is an outgoing terminal of a winding branch 230 .

[0221] At least a portion of the conductor structures 220 is used to connect to the busbar of the motor. By defining the placement position of the second in-slot conductors 222 of the conductor structures 220, the placement position of the structure to which the busbar is connected can be indirectly defined.

[0222] The slot layer 110 where the 3×a incoming terminals are located is the same layer, and the slot layer 110 where the 3×a outgoing terminals are located is the same layer. In this way, the position where the busbar is connected to the conductor structure 220 is also relatively uniform, which simplifies the structure of the busbar, helps to reduce the difficulty of processing the busbar, helps to improve the processing efficiency of the busbar, and helps to reduce the production cost of the busbar and the motor.

[0223] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: K=3, a=3; or K=3, a=1.

[0224] In this embodiment, specific parameters of the stator 1 are further refined.

[0225] K=3, a=3. Or, K=3, or a=1.

[0226] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: when a=3, in the phase winding 24, a winding branches 230 are connected in series.

[0227] like Fig.23 and Fig.24 As shown, when a=3, K=3, the three phase windings 24 are connected in star or delta.

[0228] like Fig.24 As shown, when a=1 and K=3, the three phase windings 24 are connected in a triangle.

[0229] In this embodiment, specific parameters of the stator 1 are further refined.

[0230] When a=3, in the phase winding 24, a winding branches 230 are connected in series.

[0231] When a=3, K=3, the three phase windings 24 are connected in star shape. Alternatively, when a=3, K=3, the three phase windings 24 are connected in delta shape.

[0232] When a=1 and K=3, the three phase windings 24 are connected in a triangle.

[0233] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the number of stator slots 100 spanned by the first welding conductor 214 and the second welding conductor 224 is equal.

[0234] In this embodiment, the structures of the first welding conductor 214 and the second welding conductor 224 are further defined.

[0235] The first welding conductor 214 and the second welding conductor 224 span an equal number of stator slots 100 .

[0236] This arrangement is helpful to simplify the winding process of the stator winding 20 , to reduce the winding procedures of the stator winding 20 , to improve the assembly efficiency of the product, and to reduce the production cost of the product.

[0237] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the pitch of the U-shaped coil 210 of any one of the first coil group 21 and the second coil group 22 is 9.

[0238] The pitch of a portion of the U-shaped coils 210 in the third coil group 23 is 7.

[0239] Another part of the U-shaped coils 210 in the third coil group 23 has a pitch of 8.

[0240] In this embodiment, the structures of the first coil group 21 , the second coil group 22 and the third coil group 23 are further defined.

[0241] Specifically, the pitch of the U-shaped coil 210 of any one of the first coil group 21 and the second coil group 22 is 9. That is, the pitch of the U-shaped coil 210 of the first coil group 21 is 9, and the pitch of the U-shaped coil 210 of the second coil group 22 is 9.

[0242] Specifically, a portion of the U-shaped coils 210 in the third coil group 23 has a pitch of 7, and another portion of the U-shaped coils 210 in the third coil group 23 has a pitch of 8.

[0243] This arrangement further unifies the winding method of the stator winding 20, which is simpler, easier to operate, and is conducive to mass production.

[0244] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the twelfth stator slot. The pitch of the U-shaped coil 210 is 9.

[0245] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the tenth stator slot. The pitch of the U-shaped coil 210 is 7.

[0246] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the eleventh stator slot. The pitch of the U-shaped coil 210 is 8.

[0247] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the pitch of the U-shaped coil 210 of any one of the second coil group 22 and the third coil group 23 is 9.

[0248] The pitch of a portion of the U-shaped coils 210 in the first coil group 21 is 7.

[0249] Another part of the U-shaped coils 210 in the first coil group 21 has a pitch of 8.

[0250] In this embodiment, the structures of the first coil group 21 , the second coil group 22 and the third coil group 23 are further defined.

[0251] Specifically, the pitch of the U-shaped coil 210 of any one of the second coil group 22 and the third coil group 23 is 9. That is, the pitch of the U-shaped coil 210 of the second coil group 22 is 9, and the pitch of the U-shaped coil 210 of the third coil group 23 is 9.

[0252] Specifically, a portion of the U-shaped coils 210 in the first coil group 21 has a pitch of 7, and another portion of the U-shaped coils 210 in the first coil group 21 has a pitch of 8.

[0253] This arrangement further unifies the winding method of the stator winding 20, which is simpler, easier to operate, and is conducive to mass production.

[0254] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the twelfth stator slot. The pitch of the U-shaped coil 210 is 9.

[0255] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the tenth stator slot. The pitch of the U-shaped coil 210 is 7.

[0256] For example, in the U-shaped coil 210 , the stator slot 100 where one first slot conductor 212 is located is the third stator slot, and the stator slot 100 where another first slot conductor 212 is located is the eleventh stator slot. The pitch of the U-shaped coil 210 is 8.

[0257] According to some other embodiments of the present application, a motor includes: a stator 1 as in any of the above embodiments.

[0258] Since the motor provided in the present application includes the stator 1 as in the first aspect, it has all the beneficial effects of the above-mentioned stator 1, which will not be described one by one here.

[0259] Exemplarily, the motor comprises a flat wire motor.

[0260] A vehicle according to some further embodiments of the present application includes: a motor as described in the above embodiments.

[0261] The vehicle provided in the present application includes a motor as in the above-mentioned embodiment, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0262] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0263] The vehicle may also be a fuel-powered vehicle.

[0264] The motor of the present application is a driving motor of a vehicle, which is used to provide power to the vehicle.

[0265] Exemplarily, the present application reasonably arranges the structure of the stator 1 to simplify the wire insertion method of the coils in the stator winding 20 , which can facilitate automated wire insertion and facilitate the transformation of the winding branches 230 of the stator winding 20 .

[0266] Exemplarily, the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 is provided with 54 stator slots 100, and the 54 stator slots 100 are arranged along the circumference of the stator 1. Each stator slot 100 is provided with N layers of flat wire conductors. Fig.10 As shown, in each stator slot 100, along the slot depth direction of the stator slot 100 (the slot depth direction of the stator slot 100 includes the direction from the slot bottom of the stator slot 100 to the slot opening of the stator slot 100, and the slot depth direction of the stator slot 100 also includes the direction from the slot opening of the stator slot 100 to the slot bottom of the stator slot 100), N layers of flat wire conductors are recorded as L1 layer, L2 layer, ... LN-1 layer and LN layer, and N is an even number greater than or equal to 6.

[0267] The stator winding 20 includes a first coil group 21, a second coil group 22 and a third coil group 23. The first coil group 21, the second coil group 22 and the third coil group 23 each include a plurality of U-shaped coils 210. The U-shaped coil 210 includes two first slot conductors 212, two first welding conductors 214 and a connecting conductor 216, wherein the connecting conductor 216 connects the first ends of the two first slot conductors 212, each first welding conductor 214 connects the second end of a first slot conductor 212, and each first slot conductor 212 penetrates a slot layer 110 of a stator slot 100. The two first slot conductors 212 of the U-shaped coil 210 layer are respectively inserted into different stator slots 100.

[0268] The number of phase windings 24 of the stator winding 20 is three, and the number of poles of the stator winding 20 is six.

[0269] The second coil group 22 includes 6×a half coils (i.e., conductor structures 220), each half coil including a second in-slot conductor 222 and a second welded conductor 224. The second in-slot conductors 222 are respectively inserted into different stator slots 100, and the second welded conductors 224 are connected to the second in-slot conductors 222. Each first in-slot conductor 212 in the first coil group 21 forms a flat wire conductor of the L1 layer in one stator slot 100. The plurality of first in-slot conductors 212 and the plurality of second in-slot conductors 222 in the second coil group 22 form flat wire conductors of the 2nd to N-1th layers of the plurality of stator slots 100. Each first in-slot conductor 212 in the third coil group 23 forms a flat wire conductor of the LN layer in one stator slot 100.

[0270] In the U-shaped coil 210 of the second coil group 22 , the slot layer 110 where one first slot conductor 212 is located is the nth layer, and the slot layer 110 where another first slot conductor 212 is located is the n+1th layer, 2≤n≤N-1, and n is an even number.

[0271] The plurality of stator slots 100 include a first stator slot 100a and a second stator slot 100b; in the first stator slot 100a, any one of the second slot layer 110 to the N-1th slot layer 110 is provided with a first slot conductor 212 of the second coil group 22; in the second stator slot 100b, a portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with the first slot conductor 212 of the second coil group 22, and another portion of the slot layers 110 from the second slot layer 110 to the N-1th slot layer 110 is provided with a second slot conductor 222.

[0272] The slot layers 110 where the 3×a second in-slot conductors 222 are located are all the second layers, and the slot layers 110 where the 3×a second in-slot conductors 222 are located are all the third layers.

[0273] Alternatively, the slot layers 110 where the 3×a second in-slot conductors 222 are located are all the N-2th layers, and the slot layers 110 where the 3×a second in-slot conductors 222 are located are all the N-1th layers.

[0274] It can be seen that the various U-shaped coils 210 of the stator winding 20 of the present application are plugged in at the same layer or adjacent layers, which can greatly reduce the complexity of plugging in the stator winding 20 and facilitate the automatic plugging of the stator winding 20.

[0275] In addition, in the embodiment of the present application, since the L1 layer and the LN layer are both plugged in at the same layer, and the L2 layer to the LN-1 layer are all plugged in at adjacent layers, when it is necessary to expand the number of layers of flat wire conductors in the stator slot 100, they can be directly plugged in according to the plug-in method of the L2 layer to the LN-1 layer, without making any additional changes to the plug-in method. Therefore, the plug-in method of the stator winding 20 of the present application is more flexible and easy to realize automated production.

[0276] Exemplarily, the number of stator slots 100 spanned by the first welding conductor 214 and the second welding conductor 224 is 9 / 2.

[0277] Exemplarily, in the U-shaped coil 210 of the first coil group 21, the two first welding conductors 214 are both bent and arranged along the first direction. In the U-shaped coil 210 of the second coil group 22, one first welding conductor 214 is bent and arranged along the first direction, and the other first welding conductor 214 is bent and arranged along the second direction. In the U-shaped coil 210 of the third coil group 23, the two first welding conductors 214 are both bent and arranged along the second direction. The conductor structure 220 is connected to a U-shaped coil 210 of the second coil group 22, and a first in-slot conductor 212 and a first welding conductor 214 of the U-shaped coil 210 connected to the conductor structure 220 are respectively recorded as a reference in-slot conductor and a reference welding conductor, the reference welding conductor is connected to the reference in-slot conductor, the slot layer 110 where the second in-slot conductor 222 of the conductor structure 220 is located is the same as the slot layer 110 where the reference in-slot conductor is located, and the bending direction of the second welding conductor 224 of the conductor structure 220 is the same as the bending direction of the reference welding conductor.

[0278] The coils of the stator winding 20 are connected through the first welding conductor 214 and the second welding conductor 224. The end of the first welding conductor 214 away from the first slot conductor 212 is called a welding point, and the first end of the second welding conductor 224 away from the second slot conductor 222 is called a welding point. The Lm layer welding point and the Lm+1 layer welding point are connected by welding process, 2≤m≤N-1, and m is an odd number.

[0279] It can be understood that, in the present application, after the first in-slot conductor 212 is inserted, the first in-slot conductor 212 is bent to form the first welding conductor 214 .

[0280] Exemplarily, the pitch of the U-shaped coils 210 of the first coil group 21 is 9, the pitch of the U-shaped coils 210 of the second coil group 22 is 9, the pitch of a portion of the U-shaped coils 210 of the third coil group 23 is 7, and the pitch of another portion of the U-shaped coils 210 of the third coil group 23 is 8.

[0281] Exemplarily, the pitch of the U-shaped coil 210 of the second coil group 22 is 9, the pitch of the U-shaped coil 210 of the third coil group 23 is 9, the pitch of a portion of the U-shaped coils 210 in the first coil group 21 is 7, and the pitch of another portion of the U-shaped coils 210 in the first coil group 21 is 8.

[0282] Exemplarily, the stator winding 20 includes K phase windings 24, and each phase winding 24 includes a parallel winding branches 230. Each winding branch 230 has one incoming terminal and one outgoing terminal. The incoming terminal and the outgoing terminal are both second slot conductors 222. The slot layers 110 where the a incoming terminals are located are the same layer, and the slot layers 110 where the a outgoing terminals are located are the same layer.

[0283] For example, when a=3, the outlet terminal of the first winding branch 230 and the inlet terminal of the second winding branch 230 can be replaced with a U-shaped coil 210. The outlet terminal of the second winding branch 230 and the inlet terminal of the third winding branch 230 can be replaced with a U-shaped coil 210. The multiple parallel winding branches 230 of each phase winding 24 are transformed into a series winding branch 230. This setting does not increase the number of coil types while achieving the transformation of the winding branches 230.

[0284] For example, when a=3, the three phase windings 24 can be connected in star or in delta.

[0285] For example, when a=1, the three phase windings 24 may be connected in a delta configuration.

[0286] like Figure 1 As shown, the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 is provided with 54 stator slots 100, and the 54 stator slots 100 are arranged along the circumference of the stator 1. The stator winding 20 includes a first coil group 21, a second coil group 22 and a third coil group 23.

[0287] like Figure 5 , Figure 6 and Figure 7As shown, the U-shaped coil 210 includes two first in-slot conductors 212, two first welding conductors 214 and a connecting conductor 216, wherein the connecting conductor 216 connects the first ends of the two first in-slot conductors 212, each first welding conductor 214 connects the second end of a first in-slot conductor 212, and each first in-slot conductor 212 is arranged through a slot layer 110 of a stator slot 100. The second coil group 22 also includes a plurality of conductor structures 220, each conductor structure 220 includes a second in-slot conductor 222 and a second welding conductor 224 connected to each other, and each second in-slot conductor 222 is arranged in a slot layer 110 of the stator slot 100. The first coil group 21 includes a plurality of U-shaped coils 210, and the two first welding conductors 214 of the U-shaped coils 210 are both bent and arranged along the first direction. The second coil group 22 includes a plurality of U-shaped coils 210 and a plurality of in-slot conductors, wherein one first welding conductor 214 of the U-shaped coil 210 is bent and arranged along the first direction, and the other first welding conductor 214 of the U-shaped coil 210 is bent and arranged along the second direction. The third coil group 23 includes a plurality of U-shaped coils 210 , and two first welding conductors 214 of the U-shaped coils 210 are both bent and arranged along the second direction.

[0288] like Figure 8 and Fig. 9 As shown, after the U-shaped coil 210 is inserted into the stator slot 100, the portion of the first slot conductor 212 extending out of the axial end of the stator core 10 is bent to form a first welding conductor 214. After the half coil (i.e., the conductor structure 220) is inserted into the stator slot 100, the portion of the second slot conductor 222 extending out of the axial end of the stator core 10 is bent to form a second welding conductor 224.

[0289] Exemplarily, the motor includes a flat wire motor, the motor includes a stator 1, and the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 is provided with 54 stator slots 100, and the 54 stator slots 100 are respectively marked as #1, #2...#53 and #54. Fig.10 As shown, six layers of flat wire conductors are arranged in any stator slot 100. From the bottom of any stator slot 100 to the slot opening, the six layers of flat wire conductors are respectively recorded as L1 layer, L2 layer, L3 layer, L4 layer, L5 layer and L6 layer. The number of poles of the stator winding 20 is 6. The stator winding 20 includes a U-phase winding (abbreviated as U-phase), a V-phase winding (abbreviated as V-phase) and a W-phase winding (abbreviated as W-phase). Each phase winding 24 includes three winding branches 230 connected in parallel.

[0290] Fig.11 FIG. 2 is a schematic diagram of the winding of the first parallel-connected winding branch 230 of the U-phase winding of the first embodiment. Fig.15 FIG. 2 is a schematic diagram of the winding of the second parallel-connected winding branch 230 of the U-phase winding of the first embodiment. Fig.19The third parallel-connected winding branch 230 of the U-phase winding of the first embodiment is shown in FIG. The solid connecting line represents that the two first slot conductors 212 of the U-shaped coil 210 are connected by the connecting conductor 216, and the dotted connecting line represents that the two first slot conductors 212 are connected by two welding conductors. The naming method of the coil is: "coil" + "slot number, slot layer where the conductor in the slot is located" + "-" + "slot number, slot layer where the conductor in the slot is located". For example: coil #10L3-#19L2; the naming method of the incoming terminal is: "incoming terminal" + "slot number, slot layer where the conductor in the slot is located", for example: incoming terminal #1L4; the naming method of the outgoing terminal is: "outgoing terminal" + "slot number, slot layer where the conductor in the slot is located", for example: outgoing terminal #28L5.

[0291] The following is a detailed description of the connection method of the first parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, incoming terminal #1L4→(welding bend connection)→coil #10L3-#19L2→(welding bend connection)→coil #28L1-#37L1→(welding bend connection)→coil #28L2-#19L3→(welding bend connection)→coil #10L4-#1L5→(welding bend connection)→coil #46L6-#39L6→(welding bend connection)→coil #48L5-#3L4→(welding bend connection)→coil #12L3-#21L2→(welding bend connection)→coil #30L1-#39L1→(welding bend connection)→coil #30 L2-#21L3→(welding bend connection)→Coil #12L4-#3L5→(welding bend connection)→Coil #48L6-#2L6→(welding bend connection)→Coil #11L5-#20L4→(welding bend connection)→Coil #29L3-#38L2→(welding bend connection)→Coil #47L1-#2L1→(welding bend connection)→Coil #47L2-#38L3→(welding bend connection)→Coil #29L4-#20L5→(welding bend connection)→Coil #11L6-#19L6→(welding bend connection)→Outgoing terminal #28L5.

[0292] The following is a detailed description of the connection method of the second parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.15 , Fig.16 , Fig.17 and Fig.18As shown, incoming terminal #37L4→(welding bend connection)→coil #46L3-#1L2→(welding bend connection)→coil #10L1-#19L1→(welding bend connection)→coil #10L2-#1L3→(welding bend connection)→coil #46L4-#37L5→(welding bend connection)→coil #28L6-#21L6→(welding bend connection)→coil #30L5-#39L4→(welding bend connection)→coil #48L3-#3L2→(welding bend connection)→coil #12L1-#21L1→(welding bend connection)→coil #12 L2-#3L3→(welding bend connection)→Coil #48L4-#39L5→(welding bend connection)→Coil #30L6-#38L6→(welding bend connection)→Coil #47L5-#2L4→(welding bend connection)→Coil #11L3-#20L2→(welding bend connection)→Coil #29L1-#38L1→(welding bend connection)→Coil #29L2-#20L3→(welding bend connection)→Coil #11L4-#2L5→(welding bend connection)→Coil #47L6-#1L6→(welding bend connection)→Outgoing terminal #10L5.

[0293] The following is a detailed description of the wiring method of the third parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.19 , Fig. 20 , Fig.21 and Fig. 22As shown, incoming terminal #19L4→(welding bend connection)→coil #28L3-#37L2→(welding bend connection)→coil #46L1-#1L1→(welding bend connection)→coil #46L2-#37L3→(welding bend connection)→coil #28L4-#19L5→(welding bend connection)→coil #10L6-#3L6→(welding bend connection)→coil #12L5-#21L4→(welding bend connection)→coil #30L3-#39L2→(welding bend connection)→coil #48L1-#3L1→(welding bend connection)→coil #48L 2-#39L3→(welding bend connection)→Coil #30L4-#21L5→(welding bend connection)→Coil #12L6-#20L6→(welding bend connection)→Coil #29L5-#38L4→(welding bend connection)→Coil #47L3-#2L2→(welding bend connection)→Coil #11L1-#20L1→(welding bend connection)→Coil #11L2-#2L3→(welding bend connection)→Coil #47L4-#38L5→(welding bend connection)→Coil #29L6-#37L6→(welding bend connection)→Outgoing terminal #46L5.

[0294] The winding connection of phase V and phase W can be obtained by shifting phase U, such as Fig.23 and Fig.24 As shown, the winding connection mode can be star connection and triangle connection.

[0295] For example, the U-shaped coil 210 can replace the incoming terminal and the outgoing terminal. Figures 11 to 22 The three winding branches 230 of each phase winding 24 in the illustrated embodiment are changed into one winding branch 230. The replaced coil type is the same as the coil type of the slot layer 110 where the incoming and outgoing terminals are located, and the number of coil types does not increase.

[0296] The following is a detailed description of the second embodiment in which the three parallel winding branches 230 of the U phase are changed into one series winding branch 230, and the first welding bend portion and the second welding bend portion are collectively referred to as the welding bend portion. Fig.25 , Fig.26 , Fig. 27 and Fig.28

[0297] The connection of the V-phase and W-phase windings can be obtained by translating the U-phase, and the connection mode of the three-phase windings 24 can be a triangle connection.

[0298] Will Figures 11 to 22 In the illustrated embodiment, each winding branch 230 has three coils in layer L6, and the pitches of the coils are "7-8-8" in the connection sequence. Fig.29 , Fig.33 and Fig.37 The embodiment shown in Figures 11 to 22 On the basis of the embodiment shown, the three coils of the L6 layer are connected at a pitch of "8-8-7" during the connection process.

[0299] Fig.29 FIG. 2 is a schematic diagram of the winding of the first parallel-connected winding branch 230 of the U-phase winding of the third embodiment. Fig.33 FIG. 2 is a schematic diagram of the winding of the second parallel-connected winding branch 230 of the U-phase winding of the third embodiment. Fig.37 FIG. 2 is a schematic diagram of the winding of the third parallel-connected winding branch 230 of the U-phase winding of the third embodiment.

[0300] The following is a detailed description of the connection method of the first parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.29 , Fig.30 , Fig.31 and Fig.32As shown, incoming terminal #1L4→(welding bend connection)→coil #10L3-#19L2→(welding bend connection)→coil #28L1-#37L1→(welding bend connection)→coil #28L2-#19L3→(welding bend connection)→coil #10L4-#1L5→(welding bend connection)→coil #46L6-#38L6→(welding bend connection)→coil #47L5-#2L4→(welding bend connection)→coil #11L3-#20L2→(welding bend connection)→coil #29L1-#38L1→(welding bend connection)→coil #29 L2-#20L3→(welding bend connection)→Coil #11L4-#2L5→(welding bend connection)→Coil #47L6-#39L6→(welding bend connection)→Coil #48L5-#3L4→(welding bend connection)→Coil #12L3-#21L2→(welding bend connection)→Coil #30L1-#39L1→(welding bend connection)→Coil #30L2-#21L3→(welding bend connection)→Coil #12L4-#3L5→(welding bend connection)→Coil #48L6-#1L6→(welding bend connection)→Outgoing terminal #10L5.

[0301] The following is a detailed description of the connection method of the second parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.33 , Fig.34 , Fig.35 and Fig.36As shown, incoming terminal #19L4→(welding bend connection)→coil #28L3-#37L2→(welding bend connection)→coil #46L1-#1L1→(welding bend connection)→coil #46L2-#37L3→(welding bend connection)→coil #28L4-#19L5→(welding bend connection)→coil #10L6-#2L6→(welding bend connection)→coil #11L5-#20L4→(welding bend connection)→coil #29L3-#38L2→(welding bend connection)→coil #47L1-#2L1→(welding bend connection)→coil #47L 2-#38L3→(welding bend connection)→Coil #29L4-#20L5→(welding bend connection)→Coil #11L6-#3L6→(welding bend connection)→Coil #12L5-#21L4→(welding bend connection)→Coil #30L3-#39L2→(welding bend connection)→Coil #48L1-#3L1→(welding bend connection)→Coil #48L2-#39L3→(welding bend connection)→Coil #30L4-#21L5→(welding bend connection)→Coil #12L6-#19L6→(welding bend connection)→Outgoing terminal #28L5.

[0302] The following is a detailed description of the wiring method of the third parallel-connected winding branch 230 of the U phase in this embodiment. The first welding bend and the second welding bend are collectively referred to as welding bends. Fig.37 , Fig.38 , Fig.39 and Fig.40As shown, incoming terminal #37L4→(welding bend connection)→coil #46L3-#1L2→(welding bend connection)→coil #10L1-#19L1→(welding bend connection)→coil #10L2-#1L3→(welding bend connection)→coil #46L4-#37L5→(welding bend connection)→coil #28L6-#20L6→(welding bend connection)→coil #29L5-#38L4→(welding bend connection)→coil #47L3-#2L2→(welding bend connection)→coil #11L1-#20L1→(welding bend connection)→coil #11 L2-#2L3→(welding bend connection)→Coil #47L4-#38L5→(welding bend connection)→Coil #29L6-#21L6→(welding bend connection)→Coil #30L5-#39L4→(welding bend connection)→Coil #48L3-#3L2→(welding bend connection)→Coil #12L1-#21L1→(welding bend connection)→Coil #12L2-#3L3→(welding bend connection)→Coil #48L4-#39L5→(welding bend connection)→Coil #30L6-#37L6→(welding bend connection)→Outgoing terminal #46L5.

[0303] The connection of the V-phase and W-phase windings can be obtained by translating the U-phase, and the connection mode of the three-phase windings 24 can be a star connection or a triangle connection.

[0304] exist Figures 29 to 40 Based on the embodiment shown, the incoming terminal and the outgoing terminal are replaced by coils, so that Figures 29 to 40 The three winding branches 230 of each phase winding 24 in the illustrated embodiment are changed into one winding branch 230. The replaced coil type is the same as the coil type of the slot layer 110 where the incoming and outgoing terminals are located, and the number of coil types does not increase.

[0305] The following is a detailed description of the fourth embodiment in which the three parallel winding branches 230 of the U phase are changed into one series winding branch 230, and the first welding bend portion and the second welding bend portion are collectively referred to as the welding bend portion. Fig.41 , Fig.42 , Fig.43 and Fig.44

[0306] The connection of the V-phase and W-phase windings can be obtained by translating the U-phase, and the connection mode of the three-phase windings 24 can be a star connection or a triangle connection.

[0307] In summary, in the stator winding 20 of the embodiment of the present application, the types of coil lines are greatly reduced, the number of U-shaped coil forming molds and the number of forming equipment are reduced. If robotic bending is used, the number of bending machines is reduced, ultimately reducing the investment in manufacturing equipment and reducing the production cost of the product.

[0308] In this application, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0309] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: For an electric motor, the stator comprises: A stator core, wherein the stator core is provided with a plurality of stator slots, and along the slot depth direction of the stator slots, the stator slots have N slot layers; A stator winding, wound around the stator core, the stator winding comprising a first coil group, a second coil group and a third coil group, the first coil group, the second coil group and the third coil group each comprising a plurality of U-shaped coils, the second coil group further comprising a plurality of conductor structures; The U-shaped coil comprises two first in-slot conductors, two first welding conductors and a connecting conductor, wherein the connecting conductor connects the first ends of the two first in-slot conductors, each of the first welding conductors connects the second end of one of the first in-slot conductors, and each of the first in-slot conductors passes through one of the slot layers of the stator slot; The conductor structure comprises a second in-slot conductor and a second welding conductor connected to each other, the second in-slot conductor is arranged in one of the slot layers of the stator slot, and at least a part of the conductor structures among the plurality of the conductor structures is used to be connected to the busbar of the motor; In the stator slots, one of the first slot layer and the Nth slot layer is provided with the first slot conductor of the first coil group, the other is provided with the first slot conductor of the third coil group, and one of the second slot layer to the N-1th slot layer is provided with the first slot conductor or the second slot conductor of the second coil group; In the U-shaped coil of the first coil group, the two first welding conductors are bent and arranged along a first direction; In the U-shaped coil of the second coil group, one of the first welding conductors is bent along a first direction, and another of the first welding conductors is bent along a second direction; In the U-shaped coil of the third coil group, the two first welding conductors are bent and arranged along the second direction; Wherein, the stator winding comprises a flat wire winding.

2. The stator according to claim 1, characterized in that: The plurality of stator slots include a first stator slot and a second stator slot; In the first stator slots, any one of the second slot layer to the N-1th slot layer is provided with the first slot conductor of the second coil group; In the second stator slots, a portion of the slot layers from the second slot layer to the N-1th slot layer are provided with the first slot conductors of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer are provided with the second slot conductors.

3. The stator according to claim 1, characterized in that: In each of the stator slots, a portion of the slot layers from the second slot layer to the N-1th slot layer are provided with the first slot conductor of the second coil group, and another portion of the slot layers from the second slot layer to the N-1th slot layer are provided with the second slot conductor.

4. The stator according to claim 2 or 3, characterized in that: In the U-shaped coil of the second coil group, a slot layer where the first slot conductor is located is the nth layer, and another slot layer where the first slot conductor is located is the n+1th layer, 2≤n≤N-1, n is an even number, and N is an even number greater than or equal to 6; The conductor structure is connected to one of the U-shaped coils of the second coil group, a first in-slot conductor and a first welding conductor of the U-shaped coil connected to the conductor structure are respectively recorded as a reference in-slot conductor and a reference welding conductor, the reference welding conductor is connected to the reference in-slot conductor, the slot layer where the second in-slot conductor of the conductor structure is located is the same as the slot layer where the reference in-slot conductor is located, and the bending direction of the second welding conductor of the conductor structure is the same as the bending direction of the reference welding conductor.

5. The stator according to any one of claims 1 to 3, characterized in that: The stator winding includes K phase windings, each phase winding includes a winding branches, and the K phase windings are divided into the first coil group, the second coil group and the third coil group; The number of poles of the stator winding is 6, and the number of the conductor structures is 6×a.

6. The stator according to claim 5, characterized in that: The slot layers where 3×a second slot conductors are located are all second layers, and the slot layers where 3×a second slot conductors are located are all third layers.

7. The stator according to claim 5, characterized in that: The slot layers where the 3×a second slot conductors are located are all N-2 layers, and the slot layers where the 3×a second slot conductors are located are all N-1 layers.

8. The stator according to claim 5, characterized in that: Any one of the 3×a conductors in the second slot is an incoming terminal of the winding branch, and any one of the 3×a conductors in the second slot is an outgoing terminal of the winding branch; The slot layers where the 3×a incoming terminals are located are on the same layer, and the slot layers where the 3×a outgoing terminals are located are on the same layer.

9. The stator according to claim 8, characterized in that K = 3, a = 3; or K=3, a=1.

10. The stator according to claim 9, characterized in that When a=3, in the phase winding, a winding branches are connected in series; When a=3, K=3, the three phase windings are connected in star or delta; When a=1, K=3, the three phase windings are connected in a triangle.

11. The stator according to any one of claims 1 to 3, characterized in that: The first welding conductor and the second welding conductor span an equal number of stator slots; The pitch of the U-shaped coils in any one of the first coil group and the second coil group is 9, the pitch of a part of the U-shaped coils in the third coil group is 7, and the pitch of another part of the U-shaped coils in the third coil group is 8; or The pitch of the U-shaped coil in any one of the second coil group and the third coil group is 9, the pitch of a portion of the U-shaped coil in the first coil group is 7, and the pitch of another portion of the U-shaped coil in the first coil group is 8.

12. A motor, characterized in that: include: A stator as claimed in any one of claims 1 to 11.

13. A vehicle, characterized in that: include: The motor as claimed in claim 12.

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