Stator, electric machine and vehicle

Abstract

This application provides a stator, an electric motor, and a vehicle. The stator includes a stator core and stator windings, comprising multiple coil groups including a first coil group and N / 2-1 second coil groups. Each coil group includes multiple U-shaped coils connected in series, each U-shaped coil including two slot conductors, each slot conductor located in a slot layer of a stator slot. In the first coil group, the slot layers containing the two slot conductors are the first layer and the second layer, respectively. In the second coil group, the slot layer containing one slot conductor is the nth layer, and the slot layer containing the other slot conductor is the (n+1)th layer. In a winding branch, one of the multiple U-shaped coils has a break; or in a winding branch, the connection point between two of the multiple U-shaped coils has a break. This configuration reduces the radial dimension of the stator windings.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and more specifically, to a stator, an electric motor, and a vehicle. Background Technology

[0002] In related technologies, motors include a stator and an injection ring. Due to the limited radial dimensions of the stator windings, the installation space for the injection ring is small. To effectively assemble the injection ring, the wall thickness and overall dimensions of the injection ring are correspondingly reduced. This reduces the structural strength and rigidity of the injection ring, shortens its service life, and increases the subsequent maintenance and repair costs of the motor. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the first aspect of this application proposes a stator.

[0005] The second aspect of this application proposes an electric motor.

[0006] The third aspect of this application proposes a vehicle.

[0007] In view of the above, the first aspect of this application provides a stator, comprising: a stator core having a plurality of stator slots, wherein the stator slots have N slot layers along the slot depth direction, where N is an even number greater than or equal to 4; a stator winding wound on the stator core; the stator winding comprising a plurality of phase windings, each phase winding comprising a plurality of winding branches, each winding branch comprising two coil assemblies connected in series, each coil assembly comprising a plurality of coil groups connected in series, the plurality of coil groups being stacked along the slot depth direction of the stator slots, the plurality of coil groups comprising a first coil group and N / 2-1 second coil groups; each coil group comprising a plurality of U-shaped coils connected in series, the plurality of U-shaped coils being arranged along the circumference of the stator, each U-shaped coil containing... The system includes two opposing and spaced-apart slot conductors, each located in a slot layer of a stator slot; in the U-shaped coil of the first coil group, the slot layers where the two slot conductors are located are the first layer and the second layer, respectively; in the U-shaped coil of the second coil group, the slot layer where one slot conductor is located is the nth layer, and the slot layer where the other slot conductor is located is the (n+1)th layer, where 3 ≤ n ≤ N, and n is an odd number; in the winding branch, one of the multiple U-shaped coils has a disconnection part, which is used to disconnect the two slot conductors of the U-shaped coil; or in the winding branch, the connection point of two of the multiple U-shaped coils has a disconnection part, which is used to disconnect the two U-shaped coils; wherein, the stator winding includes a flat wire winding.

[0008] The stator provided in this application includes a stator core and a stator winding. The stator winding is wound around the stator core.

[0009] It is understandable that the stator core has multiple stator slots, which are arranged at intervals along the circumference of the stator.

[0010] The stator winding includes multiple phase windings, and any one of the multiple phase windings includes multiple winding branches.

[0011] In a phase winding, any one of the multiple winding branches includes two coil assemblies connected in series. Each coil assembly includes multiple coil groups connected in series, and the multiple coil groups are stacked in the slot depth direction of the stator slot.

[0012] Specifically, the multiple coil groups are classified into several types, including a first coil group and N / 2-1 second coil groups.

[0013] Any one of the multiple coil groups includes multiple U-shaped coils connected in series and arranged circumferentially along the stator. Each U-shaped coil includes two slot conductors arranged opposite each other and spaced apart. Along the slot depth direction of the stator slot, the stator slot has multiple slot layers, and each slot conductor mates with a slot layer of the stator slot; specifically, each slot conductor is located in one slot layer of the stator slot.

[0014] In the U-shaped coil of the first coil group, the slot layers containing the two slot conductors are the first layer and the second layer, respectively. That is, the slot layer containing one slot conductor is the first layer, and the slot layer containing the other slot conductor is the second layer. In other words, along the slot depth direction of the stator slots, the slot layers containing the two slot conductors of the U-shaped coil of the first coil group are different, and the slot layers containing the two slot conductors of the U-shaped coil of the first coil group are adjacent layers. Therefore, it can be concluded that the U-shaped coils of the first coil group are wound on the stator core in an adjacent-layer insertion manner. That is, any U-shaped coil in the first coil group is inserted in an adjacent-layer insertion manner.

[0015] In the U-shaped coil of the second coil group, the slot layer containing one conductor is the nth layer, and the slot layer containing the other conductor is the (n+1)th layer, where 3 ≤ n ≤ N, and n is an odd number. That is, along the slot depth direction of the stator slots, the slot layers containing the two conductors of the U-shaped coil of the second coil group are different, and the slot layers containing the two conductors of the U-shaped coil of the second coil group are adjacent layers. Therefore, it can be concluded that the winding method of any U-shaped coil in the second coil group on the stator core is adjacent layer insertion.

[0016] In other words, by rationally designing the matching structure between the stator winding and the stator core, multiple U-shaped coils of the stator winding are wound on the stator core in adjacent layers. This allows for an increase in the inner diameter of the stator winding while keeping the outer diameter constant, and a decrease in the outer diameter while keeping the inner diameter constant. In other words, this design reduces the radial dimension of the stator winding. Thus, while keeping the overall dimensions of the motor constant, it reduces the space occupied by the stator winding in the internal space of the motor, increasing the installation space for the oil injection ring. This allows the oil injection ring to improve its structural strength and rigidity by adding material, reducing the probability of damage due to low structural strength and rigidity, extending its service life, and reducing the maintenance and repair costs of the motor.

[0017] Meanwhile, this structural design allows the stator windings to be directly connected in the same way when it is necessary to increase the number of conductor layers in the stator slots, without the need to make any additional changes to the connection method. In other words, the connection method of the stator windings in this application is more flexible, has convenient winding, is conducive to improving the assembly efficiency of the stator, is conducive to realizing automated production, and thus helps to reduce the production cost of the product.

[0018] Meanwhile, this application rationally sets the winding positions of the two coil assemblies of the stator winding in the stator slots of the stator core. This setting unifies and simplifies the shape and winding position of the two coil assemblies, reduces the types of coils in the stator winding, simplifies the winding method of the stator winding, has the convenience of winding, is conducive to improving the assembly efficiency of the stator, is conducive to realizing automated production, and thus helps to reduce the production cost of the product.

[0019] Furthermore, in the winding branch, one of the multiple U-shaped coils is provided with a disconnection section, which enables the conductors in the two slots of the U-shaped coil to be disconnected.

[0020] Alternatively, in a winding branch, a disconnection section is provided at the connection point of two U-shaped coils among multiple U-shaped coils, which can disconnect the two U-shaped coils.

[0021] In other words, the structural design of the disconnect section makes the winding branch a non-ring structure. The two slot conductors at the disconnect section serve as the input and output terminals of the winding branch, respectively.

[0022] This design allows for flexible placement of the disconnect section based on the actual usage requirements of the product. The location of the disconnect section is not fixed. It is understood that the input and output terminals of the winding branch are used to connect to the motor busbar. Since the location of the disconnect section is variable, the structure of the busbar connected to the input and output terminals can be adjusted accordingly. In related technologies, the input and output positions of the stator windings are fixed, which greatly restricts the design of the busbar and affects the optimization of the stator end dimensions. Therefore, the disconnect section structure of this application eliminates the restrictions on the busbar structure, allowing for adjustments to the busbar structure as needed, improving the product's adaptability and performance.

[0023] For example, the stator winding includes a flat wire winding.

[0024] The stator described above according to this application may also have the following additional technical features:

[0025] In some embodiments, optionally, when one of the plurality of U-shaped coils is provided with a break, one slot conductor of the U-shaped coil is an input terminal, and the other slot conductor of the U-shaped coil is an output terminal; when the connection of two of the plurality of U-shaped coils is provided with a break, one slot conductor of one U-shaped coil is an input terminal, and one slot conductor of the other U-shaped coil is an output terminal; in the phase winding, the number of winding branches is two; the stator slots where the input terminals of the two winding branches are located are adjacent, and the slot layers where the input terminals of the two winding branches are located are the same layer; the stator slots where the output terminals of the two winding branches are located are adjacent, and the slot layers where the output terminals of the two winding branches are located are the same layer.

[0026] In this embodiment, the structure of the stator winding is further defined.

[0027] When one of the multiple U-shaped coils is provided with a disconnection section, the conductor in one slot of the U-shaped coil with the disconnection section is the input terminal, and the conductor in the other slot of the U-shaped coil with the disconnection section is the output terminal.

[0028] When a disconnection is provided at the connection point of two U-shaped coils among multiple U-shaped coils, in the two disconnected U-shaped coils, one slot conductor of one U-shaped coil is the input terminal, and one slot conductor of the other U-shaped coil is the output terminal.

[0029] The incoming and outgoing terminals are connected to the busbar.

[0030] In a phase winding, there are two winding branches. The stator slots containing the input terminals of the two winding branches are arranged adjacent to each other, and the slot layers containing the input terminals of the two winding branches are the same.

[0031] In a phase winding, there are two winding branches. The stator slots containing the outgoing terminals of the two winding branches are arranged adjacent to each other, and the slot layers containing the outgoing terminals of the two winding branches are the same.

[0032] In other words, the connection positions of the busbar and the multiple winding branches of the phase winding are also relatively uniform. This simplifies the structure of the busbar, helps to reduce the processing difficulty of the busbar, helps to improve the processing efficiency of the busbar, and helps to reduce the production cost of the busbar and the motor.

[0033] In some embodiments, optionally, the groove layer containing one of the incoming terminal and the outgoing terminal is the first layer, and the groove layer containing the other is the Nth layer.

[0034] In this embodiment, the positions of the incoming and outgoing terminals are further defined.

[0035] The slot containing either the incoming or outgoing terminal is designated as layer 1, and the slot containing the other is designated as layer N. That is, the slot containing the incoming terminal is layer 1, and the slot containing the outgoing terminal is layer N. Alternatively, the slot containing the outgoing terminal is layer 1, and the slot containing the incoming terminal is layer N.

[0036] This design simplifies the stator winding structure and reduces the difficulty of winding the stator winding. Simultaneously, this design simplifies the busbar structure, reduces the busbar machining difficulty, improves busbar machining efficiency, and ultimately reduces the production costs of both the busbar and the motor.

[0037] In some embodiments, optionally, the number of poles of the stator winding is 2×P; in the first coil group, the plurality of U-shaped coils include P-1 full-pitch U-shaped coils and 1 non-full-pitch U-shaped coil; in the second coil group, the plurality of U-shaped coils include P full-pitch U-shaped coils.

[0038] In this embodiment, the structure of the stator winding is further defined.

[0039] The number of poles of the stator winding is 2×P.

[0040] The types of the multiple U-shaped coils in the first coil group are classified. In the first coil group, the multiple U-shaped coils include P-1 full-pitch U-shaped coils and 1 non-full-pitch U-shaped coil.

[0041] The types of the multiple U-shaped coils in the second coil group are classified. The second coil group includes P full-pitch U-shaped coils.

[0042] In other words, the number of poles of the stator winding is related to the type of U-shaped coil in the first and second coil groups.

[0043] It is understandable that a full-pitch U-shaped coil refers to a U-shaped coil whose pitch is equal to the stator pole pitch. A non-full-pitch U-shaped coil refers to a U-shaped coil whose pitch is not equal to the stator pole pitch.

[0044] In some embodiments, optionally, the pitch of the full-pitch U-shaped coil is 6, and the pitch of the non-full-pitch U-shaped coil is 5 or 7; in the coil group, the welding pitch of the two U-shaped coils is 6; the welding pitch of any two connected coil groups in a plurality of coil groups is 6; the welding pitch of the two coil assemblies is 6.

[0045] In this embodiment, specific parameters of the stator are given as an example.

[0046] The pitch of the full-pitch U-shaped coil is 6.

[0047] For example, in a full-pitch U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, and the stator slot where the conductor in the other slot is located is the seventh stator slot. The pitch of the full-pitch U-shaped coil is 6.

[0048] For example, in a full-pitch U-shaped coil, the stator slot where the conductor in one slot is located is the second stator slot, and the stator slot where the conductor in the other slot is located is the eighth stator slot. The pitch of the full-pitch U-shaped coil is 6.

[0049] The pitch of the non-full-pitch U-shaped coil is 5. Alternatively, the pitch of the non-full-pitch U-shaped coil is 7.

[0050] For example, in a U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, and the stator slot where the conductor in the other slot is located is the sixth stator slot. The pitch of the U-shaped coil is 5.

[0051] For example, in a U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, and the stator slot where the conductor in the other slot is located is the eighth stator slot. The pitch of the U-shaped coil is 7.

[0052] In the coil assembly, the welding pitch of the two U-shaped coils is 6. One slot conductor of one U-shaped coil (denoted as the first slot conductor) is connected to one slot conductor of the other U-shaped coil (denoted as the second slot conductor).

[0053] For example, the stator slot where the conductor in the first slot is located is the first stator slot, the stator slot where the conductor in the second slot is located is the seventh stator slot, and the welding pitch of the two U-shaped coils is 6.

[0054] For example, the stator slot where the conductor in the first slot is located is the second stator slot, the stator slot where the conductor in the second slot is located is the eighth stator slot, and the welding pitch of the two U-shaped coils is 6.

[0055] The welding pitch of any two connected coil groups in the multiple coil groups is 6. The two U-shaped coils connected to the two coil groups are referred to as the first U-shaped coil and the second U-shaped coil, respectively. One slot conductor of the first U-shaped coil (referred to as the first slot conductor) and one slot conductor of the second U-shaped coil (referred to as the second slot conductor) are connected by welding conductors.

[0056] For example, the stator slot where the conductor in the first slot is located is the first stator slot, the stator slot where the conductor in the second slot is located is the seventh stator slot, and the welding pitch of the two connected coil groups is 6.

[0057] The welding pitch of the two coil assemblies is 6. The two U-shaped coils connected to the two coil assemblies are referred to as the first U-shaped coil and the second U-shaped coil, respectively. One slot conductor of the first U-shaped coil (referred to as the first slot conductor) and one slot conductor of the second U-shaped coil (referred to as the second slot conductor) are connected by welding conductors.

[0058] For example, the stator slot where the conductor in the first slot is located is the second stator slot, and the stator slot where the conductor in the second slot is located is the eighth stator slot. The welding pitch of the two coil assemblies is 6.

[0059] In some embodiments, P = 4 and N = 6; in the phase winding, multiple winding branches are connected in series.

[0060] In this embodiment, the values ​​of P and N are further defined.

[0061] Specifically, P=4, N=6.

[0062] Specifically, in a phase winding, multiple winding branches are connected in series.

[0063] In some other embodiments, multiple winding branches in a phase winding are connected in parallel.

[0064] In some embodiments, optionally, in two connected coil groups, the slot conductor of one coil group located in the q-th layer and the slot conductor of the other coil group located in the q+1-th layer are connected, where 2≤q≤N-2 and q is an even number.

[0065] In this embodiment, the cooperative structure of multiple coil groups is further defined.

[0066] In multiple coil groups, the two U-shaped coils of two coil groups are connected.

[0067] Specifically, in the two connected coil groups, the slot conductor of one coil group located in the q-th layer and the slot conductor of the other coil group located in the q+1-th layer are connected.

[0068] This configuration, based on the U-shaped coil insertion method of the coil group, allows for adjacent layer insertion while also meeting the requirements for series connection of multiple coil groups. This enables a reduction in the size of the two coil assemblies radially along the stator, reducing the stator winding's occupancy within the motor's internal space. It also increases the installation space for the motor's oil injection ring. By increasing the material used in the oil injection ring, its structural strength and rigidity can be improved, reducing the probability of damage due to low structural strength and rigidity. This extends the oil injection ring's service life and reduces motor repair and maintenance costs.

[0069] In some embodiments, optionally, in a winding branch, a slot conductor of one coil assembly located in the first layer and a slot conductor of another coil assembly located in the Nth layer are connected.

[0070] In this embodiment, the mating structure of the two coil assemblies is further defined.

[0071] In a winding branch, a coil assembly located in the slot conductor of the first layer and another coil assembly located in the slot conductor of the Nth layer are connected.

[0072] This design ensures that the U-shaped coils of the coil assembly are connected in adjacent layers while also meeting the requirements for connecting two coil assemblies in series.

[0073] In some embodiments, optionally, any two winding branches in a phase winding have the same winding structure, and multiple winding branches are arranged circumferentially along the stator.

[0074] In this embodiment, the structure of the phase winding is further defined.

[0075] In a phase winding, any two winding branches have the same winding structure. Multiple winding branches of a phase winding are arranged circumferentially along the stator. For example, two adjacent winding branches may partially overlap. The fact that any two winding branches have the same winding structure can also be described as any two winding branches having the same winding method.

[0076] In other words, in a phase winding, one winding branch can coincide with another winding branch after rotating a certain angle along the circumference of the stator.

[0077] This design simplifies the stator winding process, makes operation convenient, improves stator assembly efficiency, and facilitates mass production.

[0078] In some embodiments, optionally, any two phase windings have the same winding structure, and multiple phase windings are arranged circumferentially along the stator.

[0079] In this embodiment, the structure of the stator winding is further defined.

[0080] Any two phase windings have the same winding structure. Multiple phase windings are arranged circumferentially along the stator. For example, two adjacent phase windings partially overlap. The fact that any two phase windings have the same winding structure can also be described as meaning that any two phase windings are wound in the same way.

[0081] In other words, one phase winding can overlap with another phase winding after rotating a certain angle around the stator.

[0082] This design simplifies the stator winding process, makes operation convenient, improves stator assembly efficiency, and facilitates mass production.

[0083] The second aspect of this application proposes an electric motor, comprising: a stator as described in the first aspect.

[0084] The motor provided in this application includes a stator as described in the first aspect, and therefore has all the beneficial effects of the aforementioned stator, which will not be described in detail here.

[0085] A third aspect of this application proposes a vehicle comprising: an electric motor as described in the second aspect.

[0086] The vehicle provided in this application includes an electric motor as described in the second aspect, and therefore has all the beneficial effects of the aforementioned electric motor, which will not be described in detail here.

[0087] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0088] The vehicle can also be a gasoline-powered car.

[0089] The motor in this application is a drive motor for vehicles, used to provide power to the vehicles.

[0090] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0091] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0092] Figure 1 A schematic diagram of the stator structure according to an embodiment of this application is shown;

[0093] Figure 2 A partial structural schematic diagram of the stator according to an embodiment of this application is shown;

[0094] Figure 3 A schematic diagram of the structure of a U-shaped coil with the two slot conductors disconnected according to an embodiment of this application is shown;

[0095] Figure 4 This invention illustrates a schematic diagram of a structure in which two U-shaped coils are disconnected according to an embodiment of the present application.

[0096] Figure 5 A schematic diagram of the winding of a coil assembly of a winding branch of a U-phase winding according to an embodiment of this application is shown;

[0097] Figure 6 A schematic diagram of the winding of another coil assembly of a winding branch of a U-phase winding according to an embodiment of this application is shown;

[0098] Figure 7 This illustration shows a winding diagram of a U-phase winding according to an embodiment of the present application, where one winding branch is not provided with a disconnection.

[0099] Figure 8 This invention provides a schematic diagram of the winding of a winding branch of a U-phase winding in one embodiment of the present application, with a disconnection portion provided.

[0100] Figure 9 A schematic diagram of the winding of another winding branch of the U-phase winding in one embodiment of this application is shown, with a disconnection section provided.

[0101] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0102] 1 stator, 10 stator core, 100 stator slots, 110 slot layers, 20 stator windings, 22 phase windings, 24 winding branches, 200 coil assemblies, 210 coil groups, 210a first coil group, 210b second coil group, 212 U-shaped coils, 212a full-pitch U-shaped coils, 212b non-full-pitch U-shaped coils, 2122 slot conductors, 30 disconnected sections. Detailed Implementation

[0103] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0104] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0105] The following reference Figures 1 to 9 This application describes a stator 1, a motor, and a vehicle according to some embodiments.

[0106] like Figure 1 and Figure 2 As shown, a stator 1 according to some embodiments of this application includes a stator core 10 and a stator winding 20. The stator winding 20 is wound around the stator core 10.

[0107] The stator core 10 is provided with multiple stator slots 100.

[0108] Along the depth direction of the stator slot 100, the stator slot 100 has N slot layers 110, where N is an even number greater than or equal to 4.

[0109] The stator winding 20 is wound on the stator core 10.

[0110] The stator winding 20 includes multiple phase windings 22.

[0111] Each phase winding 22 includes multiple winding branches 24.

[0112] Each winding branch 24 includes two coil assemblies 200 connected in series.

[0113] Each coil assembly 200 includes a plurality of coil groups 210 connected in series.

[0114] like Figure 5 and Figure 6 As shown, multiple coil groups 210 are stacked along the depth direction of the stator slot 100.

[0115] The multiple coil groups 210 include a first coil group 210a and N / 2-1 second coil groups 210b.

[0116] Each coil group 210 includes multiple U-shaped coils 212 connected in series.

[0117] Multiple U-shaped coils 212 are arranged circumferentially along the stator 1.

[0118] like Figure 3 and Figure 4 As shown, each U-shaped coil 212 includes two opposing and spaced-apart slot conductors 2122.

[0119] Each slot conductor 2122 is disposed in a slot layer 110 of a stator slot 100.

[0120] In the U-shaped coil 212 of the first coil group 210a, the slot layers 110 where the two slot conductors 2122 are located are the first layer and the second layer, respectively.

[0121] In the U-shaped coil 212 of the second coil group 210b, the slot layer 110 where one slot conductor 2122 is located is the nth layer, and the slot layer 110 where the other slot conductor 2122 is located is the (n+1)th layer, 3≤n≤N, and n is an odd number.

[0122] like Figure 3 As shown, in the winding branch 24, one of the multiple U-shaped coils 212 is provided with a disconnection part 30, which is used to disconnect the two slot conductors 2122 of the U-shaped coil 212.

[0123] like Figure 4 As shown, or in the winding branch 24, a disconnection part 30 is provided at the connection point of two U-shaped coils 212 among the multiple U-shaped coils 212. The disconnection part 30 is used to disconnect the two U-shaped coils 212.

[0124] The stator winding 20 includes a flat wire winding.

[0125] The stator 1 provided in this application includes a stator core 10 and a stator winding 20. The stator winding 20 is wound around the stator core 10.

[0126] It is understandable that the stator core 10 is provided with multiple stator slots 100, which are arranged at intervals along the circumference of the stator 1.

[0127] The stator winding 20 includes multiple phase windings 22, and any one of the multiple phase windings 22 includes multiple winding branches 24.

[0128] In phase winding 22, any one of the multiple winding branches 24 includes two coil assemblies 200 connected in series. Each coil assembly 200 includes multiple coil groups 210 connected in series, and the multiple coil groups 210 are stacked in the slot depth direction of the stator slot 100.

[0129] Specifically, the multiple coil groups 210 are classified into different types, including a first coil group 210a and N / 2-1 second coil groups 210b.

[0130] Any one of the multiple coil groups 210 includes multiple U-shaped coils 212, which are connected in series and arranged circumferentially along the stator 1. Each U-shaped coil 212 includes two slot conductors 2122, which are arranged opposite to each other and spaced apart. Along the slot depth direction of the stator slot 100, the stator slot 100 has multiple slot layers 110, and each slot conductor 2122 mates with a slot layer 110 of the stator slot 100. Specifically, each slot conductor 2122 is disposed in a slot layer 110 of a stator slot 100.

[0131] In the U-shaped coil 212 of the first coil group 210a, the slot layers 110 where the two slot conductors 2122 are located are the first layer and the second layer, respectively. That is, the slot layer 110 where one slot conductor 2122 is located is the first layer, and the slot layer 110 where the other slot conductor 2122 is located is the second layer. In other words, along the slot depth direction of the stator slot 100, the slot layers 110 where the two slot conductors 2122 of the U-shaped coil 212 of the first coil group 210a are located are different, and the slot layers 110 where the two slot conductors 2122 of the U-shaped coil 212 of the first coil group 210a are located are adjacent layers. Therefore, it can be seen that the U-shaped coil 212 of the first coil group 210a is wound on the stator core 10 in an adjacent layer insertion manner. That is, any U-shaped coil 212 of the first coil group 210a is inserted in an adjacent layer.

[0132] In the U-shaped coil 212 of the second coil group 210b, the slot layer 110 containing one slot conductor 2122 is the nth layer, and the slot layer 110 containing the other slot conductor 2122 is the (n+1)th layer, where 3 ≤ n ≤ N, and n is an odd number. That is, along the slot depth direction of the stator slot 100, the slot layers 110 containing the two slot conductors 2122 of the U-shaped coil 212 of the second coil group 210b are different, and the slot layers 110 containing the two slot conductors 2122 of the U-shaped coil 212 of the second coil group 210b are adjacent layers. Therefore, it can be concluded that the winding method of any U-shaped coil 212 of the second coil group 210b on the stator core 10 is adjacent layer insertion.

[0133] In other words, by rationally designing the matching structure between the stator winding 20 and the stator core 10, the multiple U-shaped coils 212 of the stator winding 20 are wound on the stator core 10 in an adjacent layer-by-layer interlocking manner. In this way, the inner diameter of the stator winding 20 can be increased while keeping the outer diameter unchanged, and the outer diameter of the stator winding 20 can be decreased while keeping the inner diameter unchanged. That is to say, this design can reduce the radial dimension of the stator winding 20 in the stator 1. Thus, while keeping the overall dimensions of the motor unchanged, the occupancy rate of the stator winding 20 in the internal space of the motor can be reduced along the radial direction of the stator 1, and the installation space of the oil injection ring can be increased. In this way, the oil injection ring can improve its structural strength and rigidity by increasing the material, reducing the probability of damage to the oil injection ring due to its low structural strength and rigidity, which is beneficial to extending the service life of the oil injection ring and reducing the maintenance cost of the motor.

[0134] Meanwhile, this structural design allows the stator winding 20 to be directly connected in the same way when it is necessary to increase the number of layers of conductor 2122 in the stator slot 100, without the need to make any additional changes to the connection method. In other words, the connection method of the stator winding 20 in this application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator 1, facilitating automated production, and thus reducing the production cost of the product.

[0135] Meanwhile, this application rationally sets the winding positions of the two coil assemblies 200 of the stator winding 20 in the stator slots 100 of the stator core 10. This setting unifies and simplifies the shape and winding position of the two coil assemblies 200, reduces the types of coils in the stator winding 20, simplifies the winding method of the stator winding 20, has winding convenience, is conducive to improving the assembly efficiency of the stator 1, is conducive to realizing automated production, and thus helps to reduce the production cost of the product.

[0136] Furthermore, in the winding branch 24, one of the multiple U-shaped coils 212 is provided with a disconnection part 30, which enables the two slot conductors 2122 of the U-shaped coil 212 to be disconnected.

[0137] Alternatively, in the winding branch 24, a disconnection part 30 is provided at the connection point of two U-shaped coils 212 among the multiple U-shaped coils 212, and the disconnection part 30 can disconnect the two U-shaped coils 212.

[0138] In other words, the structural arrangement of the disconnection section 30 makes the winding branch 24 a non-ring structure. The two slot conductors 2122 at the disconnection section 30 serve as the input terminal and output terminal of the winding branch 24, respectively.

[0139] This design allows the position of the disconnect section 30 to be freely set according to the actual usage requirements of the product. It is understood that the input and output terminals of the winding branch 24 are used to connect to the motor busbar. Since the position of the disconnect section 30 can be set according to actual usage requirements, the structure of the busbar connected to the input and output terminals can be adjusted accordingly. In related technologies, the input and output positions of the stator winding 20 are fixed, which greatly restricts the design of the busbar, thus affecting the optimization of the stator end dimensions. Therefore, the structural design of the disconnect section 30 in this application eliminates the restriction on the structural design of the busbar, allowing the busbar structure to be adjusted as needed, improving the product's adaptability and performance.

[0140] Examples include N=6, N=8, and N=10, etc., which will not be listed here.

[0141] It is understandable that the classification of coil group 210 is related to the number of slot layers 110 of stator slot 100.

[0142] For example, the stator winding 20 includes a flat wire winding.

[0143] 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 one of the plurality of U-shaped coils 212 is provided with a disconnection portion 30, one slot conductor 2122 of the U-shaped coil 212 is an input terminal, and the other slot conductor 2122 of the U-shaped coil 212 is an output terminal.

[0144] When a disconnection 30 is provided at the connection point of two U-shaped coils 212 among a plurality of U-shaped coils 212, one slot conductor 2122 of one U-shaped coil 212 is an inlet terminal, and one slot conductor 2122 of the other U-shaped coil 212 is an outlet terminal.

[0145] In phase winding 22, there are two winding branches 24.

[0146] The stator slots 100 where the incoming terminals of the two winding branches 24 are located are arranged adjacently, and the slot layers 110 where the incoming terminals of the two winding branches 24 are located are the same layer.

[0147] The stator slots 100 where the outgoing terminals of the two winding branches 24 are located are adjacent to each other, and the slot layers 110 where the outgoing terminals of the two winding branches 24 are located are the same layer.

[0148] In this embodiment, the structure of the stator winding 20 is further defined.

[0149] When one of the multiple U-shaped coils 212 is provided with a disconnection part 30, one slot conductor 2122 of the U-shaped coil 212 with the disconnection part 30 is the input terminal, and the other slot conductor 2122 of the U-shaped coil 212 with the disconnection part 30 is the output terminal.

[0150] When a disconnection 30 is provided at the connection point of two U-shaped coils 212 among a plurality of U-shaped coils 212, in the two disconnected U-shaped coils 212, one slot conductor 2122 of one U-shaped coil 212 is an inlet terminal, and one slot conductor 2122 of the other U-shaped coil 212 is an outlet terminal.

[0151] Both the incoming and outgoing terminals are connected to the busbar.

[0152] In phase winding 22, there are two winding branches 24. The stator slots 100 where the input terminals of the two winding branches 24 are located are adjacent to each other, and the slot layers 110 where the input terminals of the two winding branches 24 are located are the same layer.

[0153] In phase winding 22, there are two winding branches 24. The stator slots 100 where the outgoing terminals of the two winding branches 24 are located are adjacent to each other, and the slot layers 110 where the outgoing terminals of the two winding branches 24 are located are the same layer.

[0154] That is, the connection positions of the busbar and the multiple winding branches 24 of the phase winding 22 are also relatively uniform. This simplifies the structure of the busbar, helps to reduce the processing difficulty of the busbar, helps to improve the processing efficiency of the busbar, and helps to reduce the production cost of the busbar and the motor.

[0155] 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 groove layer 110 where one of the incoming terminal and the outgoing terminal is located is the first layer, and the groove layer 110 where the other is located is the Nth layer.

[0156] In this embodiment, the positions of the incoming and outgoing terminals are further defined.

[0157] The slot layer 110 containing either the incoming terminal or the outgoing terminal is the first layer, and the slot layer 110 containing the other is the Nth layer. That is, the slot layer 110 containing the incoming terminal is the first layer, and the slot layer 110 containing the outgoing terminal is the Nth layer. Alternatively, the slot layer 110 containing the outgoing terminal is the first layer, and the slot layer 110 containing the incoming terminal is the Nth layer.

[0158] This design simplifies the winding structure of the stator winding 20 and reduces its winding difficulty. Simultaneously, this design simplifies the busbar structure, reduces its machining difficulty, improves its machining efficiency, and ultimately lowers the production costs of both the busbar and the motor.

[0159] 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 poles of the stator winding 20 is 2×P.

[0160] In the first coil group 210a, the multiple U-shaped coils 212 include P-1 full-pitch U-shaped coils 212a and 1 non-full-pitch U-shaped coil 212b.

[0161] In the second coil group 210b, the multiple U-shaped coils 212 include P full-pitch U-shaped coils 212a.

[0162] In this embodiment, the structure of the stator winding 20 is further defined.

[0163] The number of poles of stator winding 20 is 2×P.

[0164] The types of the multiple U-shaped coils 212 in the first coil group 210a are classified. In the first coil group 210a, the multiple U-shaped coils 212 include P-1 full-pitch U-shaped coils 212a and 1 non-full-pitch U-shaped coil 212b.

[0165] The types of the multiple U-shaped coils 212 in the second coil group 210b are classified. In the second coil group 210b, the multiple U-shaped coils 212 include P full-pitch U-shaped coils 212a.

[0166] That is, the number of poles of the stator winding 20 is related to the type of U-shaped coil 212 of the first coil group 210a and the second coil group 210b.

[0167] It is understandable that "full-pitch U-shaped coil 212a" means that the pitch of the U-shaped coil 212 is equal to the pole pitch of stator 1. "Non-full-pitch U-shaped coil 212b" means that the pitch of the U-shaped coil 212 is not equal to the pole pitch of stator 1.

[0168] This embodiment provides a stator 1, which, in addition to the technical features of the above embodiments, further includes the following technical features: the pitch of the full-pitch U-shaped coil 212a is 6.

[0169] The pitch of the non-integer U-shaped coil 212b is 5 or 7.

[0170] In coil group 210, the welding pitch of the two U-shaped coils 212 is 6.

[0171] The welding pitch of any two connected coil groups 210 in the plurality of coil groups 210 is 6.

[0172] The welding pitch of the two coil assemblies 200 is 6.

[0173] In this embodiment, specific parameters of stator 1 are given as an example.

[0174] The pitch of the full-pitch U-shaped coil 212a is 6.

[0175] For example, in the full-pitch U-shaped coil 212a, the stator slot 100 where the conductor 2122 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 2122 in another slot is located is the seventh stator slot. The pitch of the full-pitch U-shaped coil 212a is 6.

[0176] For example, in the full-pitch U-shaped coil 212a, the stator slot 100 where the conductor 2122 in one slot is located is the second stator slot, and the stator slot 100 where the conductor 2122 in another slot is located is the eighth stator slot. The pitch of the full-pitch U-shaped coil 212a is 6.

[0177] The pitch of the non-integer U-shaped coil 212b is 5. Alternatively, the pitch of the non-integer U-shaped coil 212b is 7.

[0178] For example, in the non-full-pitch U-shaped coil 212b, the stator slot 100 where the conductor 2122 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 2122 in another slot is located is the sixth stator slot. The pitch of the non-full-pitch U-shaped coil 212b is 5.

[0179] For example, in the non-full-pitch U-shaped coil 212b, the stator slot 100 where the conductor 2122 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 2122 in another slot is located is the eighth stator slot. The pitch of the non-full-pitch U-shaped coil 212b is 7.

[0180] In coil group 210, the welding pitch of the two U-shaped coils 212 is 6. One slot conductor 2122 of one U-shaped coil 212 (denoted as the first slot conductor) is connected to one slot conductor 2122 of the other U-shaped coil 212 (denoted as the second slot conductor).

[0181] For example, the stator slot 100 where the conductor in the first slot is located is the first stator slot, the stator slot 100 where the conductor in the second slot is located is the seventh stator slot, and the welding pitch of the two U-shaped coils 212 is 6.

[0182] For example, the stator slot 100 where the conductor in the first slot is located is the second stator slot, the stator slot 100 where the conductor in the second slot is located is the eighth stator slot, and the welding pitch of the two U-shaped coils 212 is 6.

[0183] The welding pitch of any two connected coil groups 210 in the plurality of coil groups 210 is 6. The two U-shaped coils 212 connected to the two coil groups 210 are respectively referred to as the first U-shaped coil and the second U-shaped coil. One slot conductor 2122 of the first U-shaped coil (referred to as the first slot conductor) and one slot conductor 2122 of the second U-shaped coil (referred to as the second slot conductor) are connected by welding conductors.

[0184] For example, the stator slot 100 where the conductor in the first slot is located is the first stator slot, the stator slot 100 where the conductor in the second slot is located is the seventh stator slot, and the welding pitch of the two connected coil groups 210 is 6.

[0185] The welding pitch of the two coil assemblies 200 is 6. The two U-shaped coils 212 connected to the two coil assemblies 200 are respectively referred to as the first U-shaped coil and the second U-shaped coil. One slot conductor 2122 of the first U-shaped coil (referred to as the first slot conductor) and one slot conductor 2122 of the second U-shaped coil (referred to as the second slot conductor) are connected by welding conductors.

[0186] For example, the stator slot 100 where the conductor in the first slot is located is the second stator slot, and the stator slot 100 where the conductor in the second slot is located is the eighth stator slot. The welding pitch of the two coil assemblies 200 is 6.

[0187] This embodiment provides a stator 1, which, in addition to the technical features of the above embodiments, further includes the following technical features: P=4, N=6.

[0188] In phase winding 22, multiple winding branches 24 are connected in series.

[0189] In this embodiment, the values ​​of P and N are further defined.

[0190] Specifically, P=4, N=6.

[0191] Specifically, in phase winding 22, multiple winding branches 24 are connected in series.

[0192] In some other embodiments, multiple winding branches 24 in phase winding 22 are connected in parallel.

[0193] 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 two connected coil groups 210, the slot conductor 2122 of one coil group 210 located in the q-th layer and the slot conductor 2122 of the other coil group 210 located in the q+1-th layer are connected, 2≤q≤N-2, and q is an even number.

[0194] In this embodiment, the mating structure of the plurality of coil groups 210 is further defined.

[0195] In the multiple coil groups 210, the two U-shaped coils 212 of two coil groups 210 are connected.

[0196] Specifically, in the two connected coil groups 210, the slot conductor 2122 of one coil group 210 located in the q-th layer and the slot conductor 2122 of the other coil group 210 located in the q+1-th layer are connected.

[0197] This configuration, based on the U-shaped coil 212 of coil group 210 being connected in an adjacent layer-by-layer insertion manner, can meet the usage requirements of multiple coil groups 210 connected in series. This allows for a reduction in the size of the two coil assemblies 200 along the radial direction of stator 1, a reduction in the stator winding 20's occupancy of the motor's internal space along the radial direction of stator 1, and an increase in the installation space for the motor's oil injection ring. Thus, the oil injection ring can have its structural strength and rigidity improved by increasing material, reducing the probability of damage due to its low structural strength and rigidity, extending its service life, and reducing the motor's repair and maintenance costs.

[0198] 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 winding branch 24, the slot conductor 2122 of one coil assembly 200 located in the first layer and the slot conductor 2122 of another coil assembly 200 located in the Nth layer are connected.

[0199] In this embodiment, the mating structure of the two coil assemblies 200 is further defined.

[0200] In winding branch 24, one coil assembly 200 is connected to the slot conductor 2122 of the first layer and the other coil assembly 200 is connected to the slot conductor 2122 of the Nth layer.

[0201] This configuration ensures that the U-shaped coil 212 of the coil assembly 200 is connected in an adjacent layer while meeting the usage requirements of connecting two coil assemblies 200 in series.

[0202] 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 phase windings 22, the winding structures of any two winding branches 24 are the same.

[0203] Multiple winding branches 24 are arranged circumferentially along the stator 1.

[0204] In this embodiment, the structure of the phase winding 22 is further defined.

[0205] In phase winding 22, any two winding branches 24 have the same winding structure. Multiple winding branches 24 of phase winding 22 are arranged circumferentially along stator 1. For example, two adjacent winding branches 24 partially overlap. The fact that any two winding branches 24 have the same winding structure can also be described as the same winding method.

[0206] In other words, in phase winding 22, one winding branch 24 can coincide with another winding branch 24 after rotating a certain angle along the circumference of stator 1.

[0207] This design simplifies the winding method of stator winding 20, makes operation convenient, improves the assembly efficiency of stator 1, and facilitates mass production.

[0208] 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 two phase windings 22 have the same winding structure, and multiple phase windings 22 are arranged circumferentially along the stator 1.

[0209] In this embodiment, the structure of the stator winding 20 is further defined.

[0210] Any two phase windings 22 have the same winding structure. Multiple phase windings 22 are arranged circumferentially along the stator 1. For example, two adjacent phase windings 22 partially overlap. The fact that any two phase windings 22 have the same winding structure can also be described as the same winding method.

[0211] In other words, one phase winding 22 can coincide with another phase winding 22 after rotating a certain angle along the circumference of the stator 1.

[0212] This design simplifies the winding method of stator winding 20, makes operation convenient, improves the assembly efficiency of stator 1, and facilitates mass production.

[0213] An electric motor according to some embodiments of this application includes: a stator 1 as described in any of the above embodiments.

[0214] The motor provided in this application includes a stator 1 as described in any of the above embodiments, and therefore has all the beneficial effects of the stator 1 described above, which will not be described one by one here.

[0215] For example, the motor includes a flat wire motor.

[0216] A vehicle according to some embodiments of this application includes: a motor as described in the above embodiments.

[0217] The vehicle provided in this application includes a motor as described in the above embodiments, and therefore has all the beneficial effects of the motor described above, which will not be described one by one here.

[0218] It is worth noting that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0219] The vehicle can also be a gasoline-powered car.

[0220] The motor in this application is a drive motor for vehicles, used to provide power to the vehicles.

[0221] The stator 1 of this application includes a stator core 10 and a stator winding 20. The stator winding 20 includes a plurality of phase windings 22, and each phase winding 22 includes a plurality of winding branches 24. The winding branches 24 are obtained by opening a ring branch. One U-shaped coil 212 of the winding branch 24 can be opened, and the two slot conductors 2122 of the disconnected U-shaped coil 212 serve as the input terminal and the output terminal, respectively. Alternatively, the connection between the two U-shaped coils 212 of the winding branch 24 can be disconnected, and one slot conductor 2122 of one of the two connected U-shaped coils 212 serves as the input terminal, and one slot conductor 2122 of the other U-shaped coil 212 serves as the output terminal.

[0222] For example, the stator core 10 has 12×P stator slots 100, which are evenly arranged along the circumference of the stator 1. P is an integer greater than or equal to 3. The stator winding 20 is a flat wire winding, which includes a plurality of U-shaped coils 212 (e.g., U-shaped flat coils).

[0223] like Figure 2 As shown, along the depth direction of the stator slot 100, the stator slot 100 has N slot layers 110, and the stator winding 20 has N layers of slot conductors 2122 in any stator slot 100, where N is an even number greater than or equal to 4. That is, each slot layer 110 has one slot conductor 2122. The N layers of slot conductors 2122 are respectively denoted as L1 layer, L2 layer, ..., LN-1 layer and LN layer. The L1 layer can be named starting from the slot opening or the slot bottom of the stator slot 100.

[0224] The stator winding 20 has 3 phase windings 22. The stator winding 20 has 2 × P poles. Each phase winding 22 includes two parallel winding branches 24. Each winding branch 24 is formed by opening one loop branch. The winding branch 24 includes two coil assemblies 200. Each coil assembly 200 includes one first coil group 210a and N / 2-1 second coil group 210b. The first coil group 210a includes P-1 full-pitch U-shaped coils 212a and one non-full-pitch U-shaped coil 212b. The second coil group 210b includes P full-pitch U-shaped coils 212a. The pitch of the full-pitch U-shaped coil 212a is 6. The pitch of the non-full-pitch U-shaped coil 212b is 5 or 7.

[0225] In the U-shaped coil 212 of the first coil group 210a, the slot layers 110 where the two slot conductors 2122 are located are the first layer (e.g., L1 layer) and the second layer (e.g., L2 layer).

[0226] In the U-shaped coil 212 of the second coil group 210b, the slot layer 110 where one slot conductor 2122 is located is the nth layer (e.g., Ln layer), and the slot layer 110 where the other slot conductor 2122 is located is the (n+1)th layer (e.g., Ln+1 layer), 3≤n≤N, and n is an odd number.

[0227] Multiple U-shaped coils 212 of coil group 210 are connected in series. In coil group 210, the welding pitch of two U-shaped coils 212 is 6. In two connected coil groups 210, the slot conductor 2122 of one coil group 210 located in the q-th layer (e.g., Lq layer) and the slot conductor 2122 of the other coil group 210 located in the (q+1)-th layer (e.g., Lq+1 layer) are connected, where 2≤q≤N-2, and q is an even number.

[0228] Two coil assemblies 200 are welded together. The slot conductor 2122 of one coil assembly 200 located in the first layer and the slot conductor 2122 of the other coil assembly 200 located in the Nth layer are connected. The welding pitch of the two coil assemblies 200 is 6.

[0229] One of the multiple U-shaped coils 212 in the winding branch 24 is provided with a disconnection part 30. That is, one U-shaped coil 212 is replaced with two I-shaped coils to disconnect the loop branch, and the two I-shaped coils serve as the input terminal and output terminal of the winding branch 24, respectively.

[0230] Alternatively, a disconnection 30 may be provided at the connection point of two of the multiple U-shaped coils 212 in the winding branch 24. That is, the slot conductors 2122 of the two welded U-shaped coils 212 are disconnected to break the annular branch. The two disconnected slot conductors 2122 serve as the inlet and outlet terminals of the winding branch 24, respectively.

[0231] Therefore, the stator winding 20 of this application allows for free selection of the positions of the input and output terminals. This facilitates the design of the busbars connected to the input and output terminals, thereby significantly optimizing the end structure of the stator 1.

[0232] In addition, when it is necessary to expand the number of layers of conductors 2122 in the stator slot 100, they can be directly connected in the same way without any additional connection method. Therefore, the connection method of the stator 1 and stator winding 20 in this application is more flexible and facilitates automated production.

[0233] For example, each winding branch 24 of a phase winding 22 can be obtained by circumferential rotation. That is, in the phase winding 22, any two winding branches 24 have the same winding structure, and multiple winding branches 24 are arranged circumferentially along the stator 1.

[0234] For example, each of the three phase windings 22 can be obtained by circumferential rotation. That is, any two phase windings 22 have the same winding structure, and multiple phase windings 22 are arranged circumferentially along the stator 1.

[0235] For example, the stator winding 20 has 8 poles and the stator slot 100 has 6 slot layers 110, i.e., P=4 and N=6.

[0236] For example, the slot layer 110 where the incoming terminal is located is the first layer, and the slot layer 110 where the outgoing terminal is located is the Nth layer. For example, in the phase winding 22, two winding branches 24 are connected in series.

[0237] like Figure 1As shown, the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 has 48 stator slots 100. The stator winding 20 has 3 phase windings 22, which are divided into U phase, V phase and W phase. The stator winding 20 has 8 poles.

[0238] For example, such as Figure 2 As shown, each stator slot 100 is provided with 6 slot conductors 2122. From the bottom of the stator slot 100 to the opening of the stator slot 100, the slot layers 110 where the 6 slot conductors 2122 are located are respectively denoted as L1 layer, L2 layer, L3 layer, L4 layer, L5 layer and L6 layer.

[0239] For example, such as Figure 5 As shown, in the U-phase winding, the first coil assembly 200 of a winding branch 24 includes three coil groups 210, which are welded together. The three coil groups 210 include one first coil group 210a and two second coil groups 210b. The multiple coil groups 210 are welded together. The first coil group 210a includes three full-pitch U-shaped coils 212a and one non-full-pitch U-shaped coil 212b, the non-full-pitch U-shaped coil 212b having a pitch of 5. The second coil group 210b includes four full-pitch U-shaped coils 212a.

[0240] For example, such as Figure 6 As shown, in the U-phase winding, the second coil assembly 200 of one winding branch 24 includes three coil groups 210, which are welded together. The three coil groups 210 include one first coil group 210a and two second coil groups 210b. The multiple coil groups 210 are welded together. The first coil group 210a includes three full-pitch U-shaped coils 212a and one non-full-pitch U-shaped coil 212b, the non-full-pitch U-shaped coil 212b having a span of 7. The second coil group 210b includes four full-pitch U-shaped coils 212a.

[0241] For example, such as Figure 7 As shown, in the U-phase winding, two coil assemblies 200 of a winding branch 24 are welded together. It is understood that this winding branch 24 does not have a disconnection 30.

[0242] For example, such as Figure 8 As shown, disconnect Figure 7 The winding branch 24 in the winding is such that the two slot conductors 2122 at the break point serve as the input and output terminals of the winding branch 24.

[0243] Figure 8This is a schematic diagram of the winding of one winding branch 24 of the U-phase winding in this embodiment. Solid connecting lines represent the connection of U-shaped coils 212, and dashed connecting lines represent two U-shaped coils 212 welded together. The naming method of the coil is: "coil" + "slot number, slot layer 110 where conductor 2122 is located" + "-" + "slot number, slot layer 110 where conductor 2122 is located", for example: coil #7L1-#17L2.

[0244] Figure 8 The wiring configuration of the first winding branch 24 of the U-phase winding is shown.

[0245] like Figure 8 As shown, the coil sequence is as follows: #7L1-#14L2 → (welded) → #20L1-#26L2 → (welded) → #32L1-#38L2 → (welded) → #44L1-#2L2 → (welded) → #8L3-#14L4 → (welded) → #20L3-#26L4 → (welded) → #32L3-#38L4 → (welded) → #44L3-#2L4 → (welded) → #8L5-#14L6 → (welded) → #20L5-#26L6 → (welded) → #32L5-#38L6 → (welded) → #44L5-#2L6 → ( (Welding) → Coil #8L1-#13L2 → (Welding) → Coil #19L1-#25L2 → (Welding) → Coil #31L1-#37L2 → (Welding) → Coil #43L1-#1L2 → (Welding) → Coil #7L3-#13L4 → (Welding) → Coil #19L3-#25L4 → (Welding) → Coil #31L3-#37L4 → (Welding) → Coil #43L3-#1L4 → (Welding) → Coil #7L5-#13L6 → (Welding) → Coil #19L5-#25L6 → (Welding) → Coil #31L5-#37L6 → (Welding) → Coil #43L5-#1L6.

[0246] Figure 9 The wiring configuration of the second winding branch 24 of the U-phase winding is shown.

[0247] like Figure 9As shown, the coil sequence is as follows: #13L1-#20L2 → (welded) → #26L1-#32L2 → (welded) → #38L1-#44L2 → (welded) → #2L1-#8L2 → (welded) → #14L3-#20L4 → (welded) → #26L3-#32L4 → (welded) → #38L3-#44L4 → (welded) → #2L3-#8L4 → (welded) → #14L5-#20L6 → (welded) → #26L5-#32L6 → (welded) → #38L5-#44L6 → (welded) → #2L5-#8L6 → ( (Welding) → Coil #14L1-#19L2 → (Welding) → Coil #25L1-#31L2 → (Welding) → Coil #37L1-#43L2 → (Welding) → Coil #1L1-#7L2 → (Welding) → Coil #13L3-#19L4 → (Welding) → Coil #25L3-#31L4 → (Welding) → Coil #37L3-#43L4 → (Welding) → Coil #1L3-#7L4 → (Welding) → Coil #13L5-#19L6 → (Welding) → Coil #25L5-#31L6 → (Welding) → Coil #37L5-#43L6 → (Welding) → Coil #1L5-#7L6.

[0248] In this embodiment, the V-phase winding and W-phase winding can be obtained by rotating the U-phase winding.

[0249] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0250] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stator, characterized in that, include: The stator core has multiple stator slots, and along the depth direction of the stator slots, the stator slots have N slot layers, where N is an even number greater than or equal to 4; Stator windings are wound around the stator core; The stator winding includes multiple phase windings, each phase winding includes multiple winding branches, each winding branch includes two coil assemblies connected in series, each coil assembly includes multiple coil groups connected in series, the multiple coil groups are stacked along the slot depth direction of the stator slot, and the multiple coil groups include a first coil group and N / 2-1 second coil groups (210b). Each coil group includes a plurality of U-shaped coils connected in series, the plurality of U-shaped coils being arranged circumferentially along the stator, each U-shaped coil including two opposing and spaced-apart slot conductors, each slot conductor being disposed in a slot layer of a stator slot; In the U-shaped coil of the first coil group, the slot layers where the two slot conductors are located are the first layer and the second layer, respectively; In the U-shaped coil of the second coil group, the slot layer where one of the slot conductors is located is the nth layer, and the slot layer where the other slot conductor is located is the (n+1)th layer, where 3≤n≤N and n is an odd number; In the winding branch, one of the plurality of U-shaped coils is provided with a disconnection portion, the disconnection portion being used to disconnect the two slot conductors of the U-shaped coil; or In the winding branch, a disconnection part is provided at the connection point of two U-shaped coils among the plurality of U-shaped coils, and the disconnection part is used to disconnect the connection of the two U-shaped coils; The stator winding includes a flat wire winding.

2. The stator according to claim 1, characterized in that, When one of the plurality of U-shaped coils is provided with the disconnection portion, one of the slot conductors of the U-shaped coil is an inlet terminal, and the other slot conductor of the U-shaped coil is an outlet terminal; When the disconnection part is provided at the connection point of two U-shaped coils among the plurality of U-shaped coils, one of the slot conductors of one U-shaped coil is the input terminal and one of the slot conductors of the other U-shaped coil is the output terminal; In the phase winding, the number of winding branches is two; The stator slots where the input terminals of the two winding branches are located are arranged adjacent to each other, and the slot layers where the input terminals of the two winding branches are located are the same layer; The stator slots containing the outgoing terminals of the two winding branches are arranged adjacent to each other, and the slot layers containing the outgoing terminals of the two winding branches are the same layer.

3. The stator according to claim 2, characterized in that, The groove layer containing one of the incoming terminal and the outgoing terminal is the first layer, and the groove layer containing the other is the Nth layer.

4. The stator according to any one of claims 1 to 3, characterized in that, The number of poles of the stator winding is 2×P; In the first coil group, the plurality of U-shaped coils include P-1 full-pitch U-shaped coils and 1 non-full-pitch U-shaped coil; In the second coil group, the plurality of U-shaped coils include P full-pitch U-shaped coils.

5. The stator according to claim 4, characterized in that, The pitch of the full-pitch U-shaped coil is 6, and the pitch of the non-full-pitch U-shaped coil is 5 or 7. In the coil group, the welding pitch of the two U-shaped coils is 6; The welding pitch of any two connected coil groups in the plurality of coil groups is 6; The welding pitch of the two coil assemblies is 6.

6. The stator according to claim 4, characterized in that, P = 4, N = 6; In the phase winding, multiple winding branches are connected in series.

7. The stator according to any one of claims 1 to 3, characterized in that, In the two connected coil groups, the slot conductor of one coil group located in the q-th layer and the slot conductor of the other coil group located in the q+1-th layer are connected, where 2≤q≤N-2 and q is an even number.

8. The stator according to any one of claims 1 to 3, characterized in that, In the winding branch, the slot conductor of one coil assembly located in the first layer and the slot conductor of another coil assembly located in the Nth layer are connected.

9. The stator according to any one of claims 1 to 3, characterized in that, In the phase winding, any two winding branches have the same winding structure, and multiple winding branches are arranged circumferentially along the stator.

10. The stator according to any one of claims 1 to 3, characterized in that, Any two phase windings have the same winding structure, and multiple phase windings are arranged circumferentially along the stator.

11. An electric motor, characterized in that, include: The stator as described in any one of claims 1 to 10.

12. A vehicle, characterized in that, include: The motor as described in claim 11.

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