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. The stator core has N slot layers. Multiple U-shaped coils in the stator windings are divided into two coil assemblies: a first U-shaped coil and a second U-shaped coil. Each coil assembly includes N / 2 coil groups and (N / 2-1) third U-shaped coils. Each coil group includes multiple fourth U-shaped coils. In the fourth U-shaped coils, the slot layer containing one in-slot conductor is the nth layer, and the slot layer containing the other in-slot conductor is the (n+1)th layer. In the third U-shaped coils, the slot layer containing one in-slot conductor is the mth layer, and the slot layer containing the other in-slot conductor is the (m+1)th layer. One of the multiple U-shaped coils in a winding branch has a break; or the connection point of two U-shaped coils in a winding branch 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] The motor consists of stator windings and an injection ring. The stator windings have various types of coils, and the connection methods are numerous and unpredictable. This results in an excessively large stator winding size along the radial direction. With the overall dimensions of the motor remaining constant, this encroaches on the installation space for the injection ring. To install the injection ring within this limited space, the wall thickness and material input must be reduced, leading to lower structural strength and rigidity, severely impacting the ring's service life. 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 a plurality of U-shaped coils, the plurality of U-shaped coils being divided into two coil assemblies, a first U-shaped coil and a second U-shaped coil, the two coil assemblies being connected through the first U-shaped coil and the second U-shaped coil; each coil assembly comprising N / 2 coil groups and (N / 2-1) third U-shaped coils, the two coil groups being connected through a third U-shaped coil, each coil group comprising a plurality of fourth U-shaped coils connected in series; each U-shaped coil The coil includes two opposing and spaced-apart slot conductors, each slot conductor located in a slot layer of a stator slot; in the fourth U-shaped coil, 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, 1≤n≤N-1, where n is an odd number; in the third U-shaped coil, the slot layer where one slot conductor is located is the mth layer, and the slot layer where the other slot conductor is located is the (m+1)th layer, 2≤m≤N-2, where m is an even number; in the winding branch, one of the multiple U-shaped coils has a disconnection section, 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 section, 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] Any one of the multiple winding branches includes multiple U-shaped coils, which are then categorized. Specifically, the multiple U-shaped coils are divided into two coil assemblies: a first U-shaped coil and a second U-shaped coil. The two coil assemblies are connected via the first and second U-shaped coils.

[0012] Specifically, each coil assembly includes N / 2 coil groups and (N / 2-1) third U-shaped coils. Two coil groups are connected by a third U-shaped coil. Each coil assembly includes multiple fourth U-shaped coils connected in series.

[0013] Each U-shaped coil includes two slot conductors, which are arranged opposite each other and spaced apart. Along the depth direction of the stator slot, the stator slot has multiple slot layers, and each slot conductor is matched with a slot layer of the stator slot. Specifically, each slot conductor passes through a slot layer of a stator slot.

[0014] In the fourth U-shaped coil, 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 1 ≤ n ≤ N-1, 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 fourth U-shaped coil are different, and the slot layers containing the two conductors of the fourth U-shaped coil are adjacent layers. Therefore, the winding method of the fourth U-shaped coil on the stator core is adjacent layer insertion. In other words, any fourth U-shaped coil in the coil group is adjacent layer insertion.

[0015] In the third U-shaped coil, the slot layer containing one conductor is the m-th layer, and the slot layer containing the other conductor is the (m+1)-th layer, where 2 ≤ m ≤ N-2, and m is an even number. That is, along the slot depth direction of the stator slots, the slot layers containing the two conductors of the third U-shaped coil are different, and the slot layers containing the two conductors of the third U-shaped coil are adjacent layers. Therefore, it can be concluded that the winding method of the third U-shaped coil 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 two coil assemblies of the stator winding are wound on the stator core in an adjacent layer-by-layer interlocking manner. 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 unchanged, it reduces the space occupied by the stator winding within the motor's internal space along the stator's radial direction, 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 ultimately reducing the motor's repair and maintenance costs.

[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] Furthermore, one of the U-shaped coils in the winding branch has a disconnection section, which allows the conductors in the two slots of the U-shaped coil to be disconnected. For example, the disconnection section is located in the fourth U-shaped coil of the coil group. For example, the disconnection section is located in the third U-shaped coil. For example, the disconnection section is located in the second U-shaped coil. For example, the disconnection section is located in the first U-shaped coil.

[0019] Alternatively, a disconnection section may be provided at the connection point of two U-shaped coils in a winding branch, which can disconnect the two U-shaped coils.

[0020] 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.

[0021] This design allows the location of the disconnect section 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 are used to connect to the motor busbar. Since the location of the disconnect section can be set according to actual usage requirements, the structure of the busbar 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, thus affecting the optimization of the stator end dimensions. Therefore, the disconnect section structure of this application eliminates the restrictions on the busbar structure, allowing the busbar structure to be adjusted as needed, improving the product's adaptability and performance.

[0022] For example, the stator winding includes a flat wire winding.

[0023] The stator described above according to this application may also have the following additional technical features:

[0024] 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.

[0025] In this embodiment, the structure of the stator winding is further defined.

[0026] When the disconnection part is provided on one of the multiple U-shaped coils, the conductor in one slot of the U-shaped coil with the disconnection part is the input terminal, and the conductor in the other slot of the U-shaped coil with the disconnection part is the output terminal.

[0027] When the disconnection part is located 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.

[0028] The incoming and outgoing terminals are connected to the busbar.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In some embodiments, optionally, the plurality of slot conductors of each coil assembly include a first slot conductor and a second slot conductor, the slot layer where the first slot conductor is located is the second layer, and the slot layer where the second slot conductor is located is the (N-1)th layer; in the first U-shaped coil, the slot layers where the two slot conductors are located are both the first layer, and the first slot conductors of the two coil assemblies are connected through the two slot conductors of the first U-shaped coil; in the second U-shaped coil, the slot layers where the two slot conductors are located are both the Nth layer, and the second slot conductors of the two coil assemblies are connected through the two slot conductors of the second U-shaped coil.

[0033] In this embodiment, the mating structure of the coil assembly, the first U-shaped coil, and the second U-shaped coil is further defined.

[0034] Each coil assembly is divided into multiple slot conductors, including a first slot conductor and a second slot conductor. The slot layer containing the first slot conductor is the second layer, and the slot layer containing the second slot conductor is the (N-1)th layer. In the first U-shaped coil, both slot conductors are located in the first layer. In the second U-shaped coil, both slot conductors are located in the Nth layer.

[0035] The first slot conductor is used to mate with the first U-shaped coil. Specifically, the first slot conductors of the two coil assemblies are connected through the two slot conductors of the first U-shaped coil. One slot conductor of the first U-shaped coil is connected to the first slot conductor of one coil assembly, and the other slot conductor of the first U-shaped coil is connected to the first slot conductor of the other coil assembly.

[0036] The second slot conductor is used to mate with the second U-shaped coil. Specifically, the second slot conductors of the two coil assemblies are connected through the two slot conductors of the second U-shaped coil. One slot conductor of the second U-shaped coil is connected to the second slot conductor of one coil assembly, and the other slot conductor of the second U-shaped coil is connected to the second slot conductor of the other coil assembly.

[0037] In other words, it defines the winding position of the stator winding on the stator core. This setting standardizes and simplifies the winding position of the stator winding, reduces the winding methods of the stator winding coils, facilitates winding, improves stator assembly efficiency, facilitates automated production, and thus helps reduce product production costs.

[0038] In some embodiments, optionally, in the third U-shaped coil and the two coil groups connected thereto, the slot conductor of one coil group located in the q-th layer is connected to the slot conductor of the third U-shaped coil located in the q+1-th layer, and the slot conductor of the other coil group located in the q+3-th layer is connected to the slot conductor of the third U-shaped coil located in the q+2-th layer, where 1≤q≤N-2 and q is an odd number.

[0039] In this embodiment, the mating structure of the third U-shaped coil and the two coil groups connected thereto is further defined.

[0040] The two coil groups are connected by a third U-shaped coil.

[0041] The slot layers where the two inner conductors of the third U-shaped coil are located are the q+1 layer and the q+2 layer, respectively.

[0042] The conductor inside the slot of the third U-shaped coil in layer q+1 is connected to the conductor inside the slot of a coil group in layer q. The conductor inside the slot of the third U-shaped coil in layer q+2 is connected to the conductor inside the slot of another coil group in layer q+3.

[0043] This configuration, based on the adjacent-layer insertion method of both the U-shaped coil and the third U-shaped coil of the coil group, can meet the usage requirements of connecting two coil groups through a third U-shaped coil. This allows for 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. 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, thus extending its service life and reducing motor repair and maintenance costs.

[0044] In some embodiments, optionally, the number of poles of the stator winding is 2×P, where P is an integer greater than or equal to 3; in the coil group, the number of the fourth U-shaped coil is P-1.

[0045] In this embodiment, the number of fourth coils is further limited.

[0046] In the coil group, the number of fourth U-shaped coils is P-1, where P is an integer greater than or equal to 3. That is, the coil group includes (P-1) fourth U-shaped coils connected in series.

[0047] The number of poles in the stator winding is 2×P. The number of the fourth U-shaped coil in the coil group is related to the number of poles in the stator winding.

[0048] In some embodiments, optionally, the pitch of one of the first U-shaped coil and the second U-shaped coil is 5, and the pitch of the other is 7; the pitch of the third U-shaped coil and the fourth U-shaped coil is both 6.

[0049] In this embodiment, the structure of the stator winding is further defined.

[0050] One of the first U-shaped coils and the second U-shaped coil has a pitch of 5, and the other has a pitch of 7. Alternatively, the first U-shaped coil has a pitch of 5, and the second U-shaped coil has a pitch of 7.

[0051] The pitch of both the third and fourth U-shaped coils is 6.

[0052] This setting further standardizes the winding method of stator windings, making the winding method simpler, the operation more convenient, and facilitating mass production.

[0053] For example, in the first 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 first U-shaped coil is 5.

[0054] For example, in the second 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 second U-shaped coil is 7.

[0055] For example, in the third 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 third U-shaped coil is 6.

[0056] For example, in the fourth U-shaped coil, the stator slot where one conductor is located is the first stator slot, and the stator slot where the other conductor is located is the seventh stator slot. The pitch of the fourth U-shaped coil is 6.

[0057] 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.

[0058] In this embodiment, the structure of the phase winding is further defined.

[0059] 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.

[0060] 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.

[0061] This design simplifies the stator winding process, makes operation convenient, improves stator assembly efficiency, and facilitates mass production.

[0062] In some embodiments, optionally, any two phase windings have the same winding structure, and multiple phase windings are arranged circumferentially along the stator.

[0063] In this embodiment, the structure of the stator winding is further defined.

[0064] 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.

[0065] In other words, one phase winding can overlap with another phase winding after rotating a certain angle around the stator.

[0066] This design simplifies the stator winding process, makes operation convenient, improves stator assembly efficiency, and facilitates mass production.

[0067] In some embodiments, P = 4 and N = 6; in the phase winding, multiple winding branches are connected in series.

[0068] In this embodiment, the values ​​of P and N are further defined.

[0069] Specifically, P=4, N=6.

[0070] Specifically, in a phase winding, multiple winding branches are connected in series.

[0071] In some other embodiments, multiple winding branches in a phase winding are connected in parallel.

[0072] For example, the motor includes a flat wire motor.

[0073] The second aspect of this application proposes an electric motor, comprising: a stator as described in the first aspect.

[0074] 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.

[0075] A third aspect of this application proposes a vehicle comprising: an electric motor as described in the second aspect.

[0076] 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.

[0077] 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.

[0078] The vehicle can also be a gasoline-powered car.

[0079] The motor in this application is a drive motor for vehicles, used to provide power to the vehicles.

[0080] 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

[0081] 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:

[0082] Figure 1 A schematic diagram of the stator structure according to an embodiment of this application is shown;

[0083] Figure 2 A partial structural schematic diagram of the stator according to an embodiment of this application is shown;

[0084] 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;

[0085] 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.

[0086] Figure 5 A schematic diagram of the winding of the first coil assembly of a winding branch of a U-phase winding according to an embodiment of this application is shown.

[0087] Figure 6 A schematic diagram of the winding of the second coil assembly of a winding branch of a U-phase winding according to an embodiment of this application is shown.

[0088] Figure 7 A schematic diagram of the winding of the first U-shaped coil and the second U-shaped coil of a winding branch of a U-phase winding according to an embodiment of this application is shown.

[0089] Figure 8This invention provides a schematic diagram of the winding of a winding branch of a U-phase winding according to an embodiment of the present application without a disconnection.

[0090] Figure 9 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.

[0091] Figure 10 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.

[0092] in, Figures 1 to 10 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0093] 1 stator, 10 stator core, 100 stator slots, 110 slot layers, 20 stator windings, 22 phase windings, 200 winding branches, 210 U-shaped coils, 212 slot conductors, 212a first slot conductor, 212b second slot conductor, 214 disconnection, 220 coil assembly, 222 coil group, 2222 fourth U-shaped coil, 224 third U-shaped coil, 230 first U-shaped coil, 240 second U-shaped coil. Detailed Implementation

[0094] 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.

[0095] 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.

[0096] The following reference Figures 1 to 10 This application describes a stator 1, a motor, and a vehicle according to some embodiments.

[0097] 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.

[0098] The stator core 10 is provided with multiple stator slots 100.

[0099] 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.

[0100] The stator winding 20 is wound on the stator core 10.

[0101] The stator winding 20 includes multiple phase windings 22.

[0102] Each phase winding 22 includes multiple winding branches 200.

[0103] Each winding branch 200 includes multiple U-shaped coils 210.

[0104] like Figure 5 , Figure 6 and Figure 7 As shown, the multiple U-shaped coils 210 are divided into two coil assemblies 220, a first U-shaped coil 230 and a second U-shaped coil 240.

[0105] The two coil assemblies 220 are connected by a first U-shaped coil 230 and a second U-shaped coil 240.

[0106] like Figure 5 and Figure 6 As shown, each coil assembly 220 includes N / 2 coil groups 222 and (N / 2-1) third U-shaped coils 224.

[0107] The two coil groups 222 are connected by a third U-shaped coil 224.

[0108] Each coil group 222 includes multiple fourth U-shaped coils 2222 connected in series.

[0109] Each U-shaped coil 210 includes two opposing and spaced-apart slot conductors 212.

[0110] Each slot conductor 212 is disposed in a slot layer 110 of a stator slot 100.

[0111] In the fourth U-shaped coil 2222, the slot layer 110 where one slot conductor 212 is located is the nth layer, and the slot layer 110 where the other slot conductor 212 is located is the (n+1)th layer, 1≤n≤N-1, and n is an odd number.

[0112] In the third U-shaped coil 224, the slot layer 110 where one slot conductor 212 is located is the m-th layer, and the slot layer 110 where the other slot conductor 212 is located is the (m+1)-th layer, where 2≤m≤N-2, and m is an even number.

[0113] like Figure 3 As shown, in the winding branch 200, one of the multiple U-shaped coils 210 is provided with a disconnection part 214, which is used to disconnect the two slot conductors 212 of the U-shaped coil 210.

[0114] like Figure 4As shown, or in the winding branch 200, a disconnection part 214 is provided at the connection point of two U-shaped coils 210 among the multiple U-shaped coils 210. The disconnection part 214 is used to disconnect the connection of the two U-shaped coils 210.

[0115] The stator winding 20 includes a flat wire winding.

[0116] 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.

[0117] 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.

[0118] The stator winding 20 includes multiple phase windings 22, and any one of the multiple phase windings 22 includes multiple winding branches 200.

[0119] Any one of the multiple winding branches 200 includes multiple U-shaped coils 210, which are classified into different types. Specifically, the multiple U-shaped coils 210 are divided into two coil assemblies 220, a first U-shaped coil 230 and a second U-shaped coil 240, and the two coil assemblies 220 are connected through the first U-shaped coil 230 and the second U-shaped coil 240.

[0120] Specifically, each coil assembly 220 includes N / 2 coil groups 222 and (N / 2-1) third U-shaped coils 224. Two coil groups 222 are connected by a third U-shaped coil 224. Each coil assembly 220 includes a plurality of fourth U-shaped coils 2222, which are connected in series.

[0121] Each U-shaped coil 210 includes two slot conductors 212, 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 212 is matched with a slot layer 110 of the stator slot 100. Specifically, each slot conductor 212 passes through a slot layer 110 of a stator slot 100.

[0122] In the fourth U-shaped coil 2222, the slot layer 110 containing one slot conductor 212 is the nth layer, and the slot layer 110 containing the other slot conductor 212 is the (n+1)th layer, where 1 ≤ n ≤ N-1, 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 212 of the fourth U-shaped coil 2222 are different, and the slot layers 110 containing the two slot conductors 212 of the fourth U-shaped coil 2222 are adjacent layers. Therefore, it can be seen that the fourth U-shaped coil 2222 is wound on the stator core 10 in an adjacent-layer configuration. In other words, any fourth U-shaped coil 2222 in the coil group 222 is an adjacent-layer configuration.

[0123] In the third U-shaped coil 224, the slot layer 110 containing one slot conductor 212 is the m-th layer, and the slot layer 110 containing the other slot conductor 212 is the (m+1)-th layer, where 2 ≤ m ≤ N-2, and m is an even number. That is, along the slot depth direction of the stator slot 100, the slot layers 110 containing the two slot conductors 212 of the third U-shaped coil 224 are different, and the slot layers 110 containing the two slot conductors 212 of the third U-shaped coil 224 are adjacent layers. Therefore, it can be concluded that the winding method of the third U-shaped coil 224 on the stator core 10 is adjacent layer insertion.

[0124] In other words, by rationally designing the matching structure of the stator winding 20 and the stator core 10, the multiple U-shaped coils 210 of the two coil assemblies 220 of the stator winding 20 are wound on the stator core 10 in an adjacent 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 setting 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 of the motor can be increased. In this way, the structural strength and rigidity of the oil injection ring can be improved by increasing the material, reducing the probability of damage to the oil injection ring due to its low structural strength and rigidity, which is conducive to extending the service life of the oil injection ring and reducing the maintenance cost of the motor.

[0125] 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 212 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.

[0126] Furthermore, one of the multiple U-shaped coils 210 in the winding branch 200 is provided with a disconnection portion 214, which enables the two slot conductors 212 of the U-shaped coil 210 to be disconnected. For example, the disconnection portion 214 is provided in the fourth U-shaped coil 2222 of the coil group 222. For example, the disconnection portion 214 is provided in the third U-shaped coil 224. For example, the disconnection portion 214 is provided in the second U-shaped coil 240. For example, the disconnection portion 214 is provided in the first U-shaped coil 230.

[0127] Alternatively, a disconnection portion 214 may be provided at the connection point of two of the multiple U-shaped coils 210 in the winding branch 200, which can disconnect the two U-shaped coils 210.

[0128] In other words, the structure of the disconnection section 214 makes the winding branch 200 a non-ring structure. The two slot conductors 212 at the disconnection section 214 serve as the input terminal and output terminal of the winding branch 200, respectively.

[0129] This design allows the position of the disconnect section 214 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 200 are used to connect to the motor busbar. Since the position of the disconnect section 214 can be set according to actual usage requirements, the structure of the busbar 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, thus affecting the optimization of the stator end dimensions. Therefore, the structural design of the disconnect section 214 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.

[0130] Examples include N=6, N=8, and N=10, etc., which will not be listed here.

[0131] For example, multiple winding branches 200 of phase winding 22 are connected in series.

[0132] For example, multiple winding branches 200 of phase winding 22 are connected in parallel.

[0133] It is understandable that the number of coil groups 222 and the number of third U-shaped coils 224 are related to the number of slot layers 110 of stator slot 100.

[0134] 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 210 is provided with a disconnection portion 214, one slot conductor 212 of the U-shaped coil 210 is an inlet terminal, and the other slot conductor 212 of the U-shaped coil 210 is an outlet terminal.

[0135] When a disconnection 214 is provided at the connection point of two U-shaped coils 210 among a plurality of U-shaped coils 210, one slot conductor 212 of one U-shaped coil 210 is an inlet terminal and one slot conductor 212 of the other U-shaped coil 210 is an outlet terminal.

[0136] In phase winding 22, there are two winding branches 200.

[0137] The stator slots 100 where the incoming terminals of the two winding branches 200 are located are arranged adjacently, and the slot layers 110 where the incoming terminals of the two winding branches 200 are located are the same layer.

[0138] The stator slots 100 where the outgoing terminals of the two winding branches 200 are located are arranged adjacently, and the slot layers 110 where the outgoing terminals of the two winding branches 200 are located are the same layer.

[0139] In this embodiment, the structure of the stator winding 20 is further defined.

[0140] When one of the multiple U-shaped coils 210 is provided with a disconnection portion 214, one slot conductor 212 of the U-shaped coil 210 with the disconnection portion 214 is the input terminal, and the other slot conductor 212 of the U-shaped coil 210 with the disconnection portion 214 is the output terminal.

[0141] When a disconnection 214 is provided at the connection point of two U-shaped coils 210 among a plurality of U-shaped coils 210, in the two disconnected U-shaped coils 210, one slot conductor 212 of one U-shaped coil 210 is an inlet terminal, and one slot conductor 212 of the other U-shaped coil 210 is an outlet terminal.

[0142] The incoming and outgoing terminals are connected to the busbar.

[0143] In phase winding 22, there are two winding branches 200. The stator slots 100 where the input terminals of the two winding branches 200 are located are adjacent to each other, and the slot layers 110 where the input terminals of the two winding branches 200 are located are the same layer. For example, the stator slot 100 where the input terminal of one winding branch 200 is located is the first stator slot, and the stator slot 100 where the input terminal of the other winding branch 200 is located is the second stator slot 100. The first stator slot and the second stator slot 100 are arranged adjacent to each other.

[0144] In phase winding 22, there are two winding branches 200. The stator slots 100 where the outgoing terminals of the two winding branches 200 are located are adjacent to each other, and the slot layers 110 where the outgoing terminals of the two winding branches 200 are located are the same layer. For example, the stator slot 100 where the outgoing terminal of one winding branch 200 is located is the first stator slot, and the stator slot 100 where the outgoing terminal of the other winding branch 200 is located is the second stator slot 100. The first stator slot and the second stator slot 100 are arranged adjacent to each other.

[0145] That is, the connection positions of the busbar and the multiple winding branches 200 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.

[0146] This embodiment provides a stator 1, which, in addition to the technical features of the above embodiments, further includes the following technical features, such as... Figure 9 As shown, each coil assembly 220 has multiple slot conductors 212, including a first slot conductor 212a and a second slot conductor 212b.

[0147] The trench layer 110 where the conductor 212a in the first trench is located is the second layer.

[0148] The trench layer 110 where the conductor 212b in the second trench is located is the (N-1)th layer.

[0149] In the first U-shaped coil 230, the slot layer 110 where the two slot conductors 212 are located is the first layer.

[0150] The first slot conductor 212a of the two coil assemblies 220 is connected through the two slot conductors 212 of the first U-shaped coil 230.

[0151] In the second U-shaped coil 240, the slot layer 110 where the two slot conductors 212 are located is the Nth layer.

[0152] The second slot conductor 212b of the two coil assemblies 220 is connected through the two slot conductors 212 of the second U-shaped coil 240.

[0153] In this embodiment, the cooperative structure of the coil assembly 220, the first U-shaped coil 230, and the second U-shaped coil 240 is further defined.

[0154] Each coil assembly 220 has multiple slot conductors 212, including a first slot conductor 212a and a second slot conductor 212b. The slot layer 110 containing the first slot conductor 212a is the second layer, and the slot layer 110 containing the second slot conductor 212b is the (N-1)th layer. In the first U-shaped coil 230, the slot layers 110 containing both slot conductors 212 are both the first layer. In the second U-shaped coil 240, the slot layers 110 containing both slot conductors 212 are both the Nth layer.

[0155] The first slot conductor 212a is used to mate with the first U-shaped coil 230. Specifically, the first slot conductors 212a of the two coil assemblies 220 are connected through the two slot conductors 212 of the first U-shaped coil 230. One slot conductor 212 of the first U-shaped coil 230 is connected to the first slot conductor 212a of one coil assembly 220, and the other slot conductor 212 of the first U-shaped coil 230 is connected to the first slot conductor 212a of the other coil assembly 220.

[0156] The second slot conductor 212b is used to mate with the second U-shaped coil 240. Specifically, the second slot conductors 212b of the two coil assemblies 220 are connected through the two slot conductors 212 of the second U-shaped coil 240. One slot conductor 212 of the second U-shaped coil 240 is connected to the second slot conductor 212b of one coil assembly 220, and the other slot conductor 212 of the second U-shaped coil 240 is connected to the second slot conductor 212b of the other coil assembly 220.

[0157] In other words, the winding position of the stator winding 20 on the stator core 10 is defined. This setting unifies and simplifies the winding position of the stator winding 20, reduces the winding methods of the stator winding 20 coil, has the convenience of winding, 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.

[0158] 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 third U-shaped coil 224 and the two coil groups 222 connected thereto, the slot conductor 212 of one coil group 222 located in the q-th layer and the slot conductor 212 of the third U-shaped coil 224 located in the q+1-th layer are connected.

[0159] Another coil group 222 is connected to the slot conductor 212 of the (q+3)th layer and the slot conductor 212 of the third U-shaped coil 224 is connected to the slot conductor 212 of the (q+2)th layer, where 1≤q≤N-2 and q is an odd number.

[0160] In this embodiment, the mating structure of the third U-shaped coil 224 and the two coil groups 222 connected thereto is further defined.

[0161] The two coil groups 222 are connected by a third U-shaped coil 224.

[0162] The slot layers 110 where the two slot conductors 212 of the third U-shaped coil 224 are located are the q+1 layer and the q+2 layer, respectively.

[0163] The slot conductor 212 of the third U-shaped coil 224 located in the (q+1)th layer is connected to the slot conductor 212 of a coil group 222 located in the (q)th layer. The slot conductor 212 of the third U-shaped coil 224 located in the (q+2)th layer is connected to the slot conductor 212 of another coil group 222 located in the (q+3)th layer.

[0164] This configuration, based on the fact that the U-shaped coil 210 and the third U-shaped coil 224 of coil group 222 are connected in adjacent layers, can meet the usage requirements of connecting two coil groups 222 through a third U-shaped coil 224. This allows for a reduction in the size of the two coil assemblies 220 radially along the stator 1, a reduction in the stator winding 20's occupancy of the motor's internal space radially along the 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 the material used, 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.

[0165] 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, where P is an integer greater than or equal to 3; in the coil group 222, the number of the fourth U-shaped coil 2222 is P-1.

[0166] In this embodiment, the number of fourth coils is further limited.

[0167] In coil group 222, the number of fourth U-shaped coils 2222 is P-1. That is, coil group 222 includes (P-1) fourth U-shaped coils 2222 connected in series.

[0168] The number of poles of stator winding 20 is 2×P, where P is an integer greater than or equal to 3. The number of the fourth U-shaped coil 2222 in coil group 222 is related to the number of poles of stator winding 20.

[0169] 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 one of the first U-shaped coil 230 and the second U-shaped coil 240 is 5, and the pitch of the other is 7.

[0170] The pitch of both the third U-shaped coil 224 and the fourth U-shaped coil 2222 is 6.

[0171] In this embodiment, the structure of the stator winding 20 is further defined.

[0172] One of the first U-shaped coil 230 and the second U-shaped coil 240 has a pitch of 5, and the other has a pitch of 7. Alternatively, the first U-shaped coil 230 has a pitch of 5, and the second U-shaped coil 240 has a pitch of 7.

[0173] The pitch of both the third U-shaped coil 224 and the fourth U-shaped coil 2222 is 6.

[0174] This setting further standardizes the winding method of stator winding 20, making the winding method simpler, the operation more convenient, and facilitating mass production.

[0175] For example, in the first U-shaped coil 230, the stator slot 100 where the conductor 212 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 212 in another slot is located is the sixth stator slot 100. The pitch of the first U-shaped coil 230 is 5.

[0176] For example, in the second U-shaped coil 240, the stator slot 100 where the conductor 212 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 212 in another slot is located is the eighth stator slot. The pitch of the second U-shaped coil 240 is 7.

[0177] For example, in the third U-shaped coil 224, the stator slot 100 where the conductor 212 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 212 in another slot is located is the seventh stator slot. The pitch of the third U-shaped coil 224 is 6.

[0178] For example, in the fourth U-shaped coil 2222, the stator slot 100 where the conductor 212 in one slot is located is the first stator slot, and the stator slot 100 where the conductor 212 in another slot is located is the seventh stator slot. The pitch of the fourth U-shaped coil 2222 is 6.

[0179] 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, any two winding branches 200 have the same winding structure, and multiple winding branches 200 are arranged circumferentially along the stator 1.

[0180] In this embodiment, the structure of the phase winding 22 is further defined.

[0181] In phase winding 22, any two winding branches 200 have the same winding structure. Multiple winding branches 200 of phase winding 22 are arranged circumferentially along stator 1. For example, two adjacent winding branches 200 partially overlap. The fact that any two winding branches 200 have the same winding structure can also be described as any two winding branches 200 having the same winding method.

[0182] In other words, in phase winding 22, one winding branch 200 can coincide with another winding branch 200 after rotating a certain angle along the circumference of stator 1.

[0183] This design simplifies the winding method of stator winding 20, makes operation convenient, improves the assembly efficiency of stator 1, and facilitates mass production.

[0184] 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.

[0185] In this embodiment, the structure of the stator winding 20 is further defined.

[0186] 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.

[0187] 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.

[0188] This design simplifies the winding method of stator winding 20, makes operation convenient, improves the assembly efficiency of stator 1, and facilitates mass production.

[0189] 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.

[0190] In this embodiment, the values ​​of P and N are further defined.

[0191] Specifically, P=4, N=6.

[0192] An electric motor according to some embodiments of this application includes: a stator 1 as described in any of the above embodiments.

[0193] 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.

[0194] For example, the motor includes a flat wire motor.

[0195] A vehicle according to some embodiments of this application includes: a motor as described in the above embodiments.

[0196] 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.

[0197] 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.

[0198] The vehicle can also be a gasoline-powered car.

[0199] The motor in this application is a drive motor for vehicles, used to provide power to the vehicles.

[0200] Exemplarily, 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 200. The winding branches 200 are obtained by opening a ring branch. One U-shaped coil 210 of the winding branch 200 can be opened, and the two slot conductors 212 of the disconnected U-shaped coil 210 serve as the input terminal and the output terminal, respectively. Alternatively, the connection between the two U-shaped coils 210 of the winding branch 200 can be disconnected, and one slot conductor 212 of one of the two connected U-shaped coils 210 serves as the input terminal, and one slot conductor 212 of the other U-shaped coil 210 serves as the output terminal.

[0201] For example, the motor includes a flat wire motor.

[0202] 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 210 (e.g., U-shaped flat coils).

[0203] 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 212 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 212. The N layers of slot conductors 212 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.

[0204] The stator winding 20 has 3 phase windings 22. The stator winding 20 has 2×P poles. The stator winding 20 includes multiple U-shaped coils 210. Each phase winding 22 includes two parallel winding branches 200. Each winding branch 200 is formed by opening one loop branch. The multiple U-shaped coils 210 of the winding branch 200 are divided such that each U-shaped coil 210 of the winding branch 200 includes two coil assemblies 220, a first U-shaped coil 230, and a second U-shaped coil 240. The coil assembly 220 includes N / 2 coil groups 222 and (N / 2-1) third U-shaped coils 224. Each coil group 222 includes P-1 fourth U-shaped coils 2222.

[0205] In the fourth U-shaped coil 2222, the slot layer 110 containing one slot conductor 212 is the nth layer, and the slot layer 110 containing the other slot conductor 212 is the (n+1)th layer, where 1 ≤ n ≤ N-1, and n is an odd number. All the fourth U-shaped coils 2222 in the coil group 222 are sequentially welded together, with a welding pitch of 6 for two fourth U-shaped coils 2222. The two U-shaped coils 210 are respectively designated as the first reference coil and the second reference coil. One slot conductor 212 of the first reference coil (designated as the first reference conductor) is connected to one slot conductor 212 of the second reference coil (designated as the second reference conductor) by welding conductors.

[0206] For example, the stator slot 100 where the first reference conductor is located is the first stator slot, the stator slot 100 where the second reference conductor is located is the seventh stator slot, and the welding pitch of the two U-shaped coils 210 is 6.

[0207] For example, the stator slot 100 where the first reference conductor is located is the second stator slot 100, the stator slot 100 where the second reference conductor is located is the eighth stator slot, and the welding pitch of the two U-shaped coils 210 is 6.

[0208] The pitch of the third U-shaped coil 224 is 6.

[0209] In the third U-shaped coil 224, the slot layer 110 where one slot conductor 212 is located is the m-th layer, and the slot layer 110 where the other slot conductor 212 is located is the (m+1)-th layer, where 2≤m≤N-2, and m is an even number.

[0210] The slot conductor 212 of coil group 222 in layer q and the slot conductor 212 of the third U-shaped coil 224 in layer q+1 are welded together. The slot conductor 212 of coil group 222 in layer q+3 and the slot conductor 212 of the third U-shaped coil 224 in layer q+2 are welded together, where 1≤q≤N-2, and q is an odd number. The welding pitch between coil group 222 and the third U-shaped coil 224 is 6.

[0211] The winding branch 200 includes a first U-shaped coil 230 and a second U-shaped coil 240. The pitch of one of the first U-shaped coil 230 and the second U-shaped coil 240 is 5, and the pitch of the other of the first U-shaped coil 230 and the second U-shaped coil 240 is 7.

[0212] In the first U-shaped coil 230, the slot layer 110 where the two slot conductors 212 are located is the first layer, and in the second U-shaped coil 240, the slot layer 110 where the two slot conductors 212 are located is the Nth layer.

[0213] Each coil assembly 220 has multiple slot conductors 212, including a first slot conductor 212a and a second slot conductor 212b. The slot layer 110 containing the first slot conductor 212a is the second layer, and the slot layer 110 containing the second slot conductor 212b is the (N-1)th layer. The first slot conductors 212a of the two coil assemblies 220 are connected through the two slot conductors 212 of the first U-shaped coil 230, and the welding pitch between the first slot conductor 212a and the slot conductors 212 of the first U-shaped coil 230 is 6. The second slot conductors 212b of the two coil assemblies 220 are connected through the two slot conductors 212 of the second U-shaped coil 240, and the welding pitch between the second slot conductors 212b and the slot conductors 212 of the second U-shaped coil 240 is 6.

[0214] One of the multiple U-shaped coils 210 in the winding branch 200 is provided with a disconnection portion 214. That is, one U-shaped coil 210 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 200, respectively.

[0215] Alternatively, a disconnection 214 may be provided at the connection point of two of the multiple U-shaped coils 210 in the winding branch 200. That is, the slot conductors 212 of the two welded U-shaped coils 210 are disconnected to break the annular branch. The two disconnected slot conductors 212 serve as the input terminal and output terminal of the winding branch 200, respectively.

[0216] 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.

[0217] In addition, when it is necessary to expand the number of layers of conductor 212 in the stator slot 100, the same insertion method can be used directly without the need for additional insertion methods. Therefore, the insertion method of the stator 1 and stator winding 20 in this application is more flexible and facilitates automated production.

[0218] For example, each winding branch 200 of a phase winding 22 can be obtained by circumferential rotation. That is, in the phase winding 22, any two winding branches 200 have the same winding structure, and multiple winding branches 200 are arranged circumferentially along the stator 1.

[0219] 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.

[0220] 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.

[0221] For example, when one of the multiple U-shaped coils 210 is provided with a disconnection portion 214, one slot conductor 212 of the U-shaped coil 210 is an input terminal, and the other slot conductor 212 of the U-shaped coil 210 is an output terminal; when the connection of two of the multiple U-shaped coils 210 is provided with a disconnection portion 214, one slot conductor 212 of one U-shaped coil 210 is an input terminal, and the other slot conductor 212 of the other U-shaped coil 210 is an output terminal; in the phase winding 22, there are two winding branches 200; the stator slots 100 where the input terminals of the two winding branches 200 are located are arranged adjacently, and the slot layers 110 where the input terminals of the two winding branches 200 are located are the same layer; the stator slots 100 where the output terminals of the two winding branches 200 are located are arranged adjacently, and the slot layers 110 where the output terminals of the two winding branches 200 are located are the same layer.

[0222] For example, such as Figure 1 As 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.

[0223] For example, each stator slot 100 is provided with 6 slot conductors 212. 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 212 are located are respectively referred to as L1 layer, L2 layer, L3 layer, L4 layer, L5 layer and L6 layer.

[0224] For example, such as Figure 5 As shown, the first winding branch 200 of the U-phase winding includes a first coil assembly and a second coil assembly. The first coil assembly includes three coil groups 222. The coil groups 222 are connected to each other by a third U-shaped coil 224. Each coil group 222 includes three fourth U-shaped coils 2222.

[0225] For example, such as Figure 6 As shown, the second coil assembly of the U-phase winding includes three coil groups 222, which are connected to each other by a third U-shaped coil 224, and each coil group 222 includes three fourth U-shaped coils 2222.

[0226] For example, such as Figure 7 As shown, the two coil assemblies 220 of the first winding branch 200 of the U-phase winding are connected through a first U-shaped coil 230 and a second U-shaped coil 240, forming a configuration as shown. Figure 8 The loop branch shown is disconnected. Two slot conductors 212 at any point in the loop branch are disconnected and the two disconnected slot conductors 212 are used as the inlet terminal and the outlet terminal, respectively.

[0227] For example, Figure 9 This is a schematic diagram of the winding of the first winding branch of the U-phase winding in this embodiment. Solid connecting lines represent the connection of U-shaped coils 210, and dashed connecting lines represent two U-shaped coils 210 welded together. The coil naming method is: "coil" + "slot number, slot layer 110 where conductor 212 is located" + "-" + "slot number, slot layer 110 where conductor 212 is located", for example: coil #14L5-#8L4.

[0228] like Figure 9 As shown, the coil sequence is as follows: #14L5-#8L4 → (welded) → #2L3-#44L4 → (welded) → #38L3-#32L4 → (welded) → #26L3-#20L4 → (welded) → #14L3-#8L2 → (welded) → #2L1-#44L2 → (welded) → #38L1-#32L2 → (welded) → #26L1-#20L2 → (welded) → #14L1-#19L1 → (welded) → #25L2-#31L1 → (welded) → #37L2-#43L1 → (welded) → #1L2-#7L1 → ( (Welding) → Coil #13L2-#19L3 → (Welding) → Coil #25L4-#31L3 → (Welding) → Coil #37L4-#43L3 → (Welding) → Coil #1L4-#7L3 → (Welding) → Coil #13L4-#19L5 → (Welding) → Coil #25L6-#31L5 → (Welding) → Coil #37L6-#43L5 → (Welding) → Coil #1L6-#7L5 → (Welding) → Coil #13L6-#8L6 → (Welding) → Coil #2L5-#44L6 → (Welding) → Coil #38L5-#32L6 → (Welding) → Coil #26L5-#20L6.

[0229] like Figure 10As shown, the coil sequence is as follows: #19L6-#14L6 → (welded) → #8L5-#2L6 → (welded) → #44L5-#38L6 → (welded) → #32L5-#26L6 → (welded) → #20L5-#14L4 → (welded) → #8L3-#2L4 → (welded) → #44L3-#38L4 → (welded) → #32L3-#26L4 → (welded) → #20L3-#14L2 → (welded) → #8L1-#2L2 → (welded) → #44L1-#38L2 → (welded) → #32L1-#26L2 → ( (Welding) → Coil #20L1-#25L1 → (Welding) → Coil #31L2-#37L1 → (Welding) → Coil #43L2-#1L1 → (Welding) → Coil #7L2-#13L1 → (Welding) → Coil #19L2-#25L3 → (Welding) → Coil #31L4-#37L3 → (Welding) → Coil #43L4-#1L3 → (Welding) → Coil #7L4-#13L3 → (Welding) → Coil #19L4-#25L5 → (Welding) → Coil #31L6-#37L5 → (Welding) → Coil #43L6-#1L5 → (Welding) → Coil #7L6-#13L5.

[0230] In this embodiment, the V-phase winding and W-phase winding can be obtained by rotating the U-phase winding.

[0231] 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.

[0232] 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 multiple U-shaped coils, and the multiple U-shaped coils are divided into two coil assemblies, a first U-shaped coil and a second U-shaped coil, and the two coil assemblies are connected through the first U-shaped coil and the second U-shaped coil; Each coil assembly includes N / 2 coil groups and (N / 2-1) third U-shaped coils, two coil groups are connected by one third U-shaped coil, and each coil group includes a plurality of fourth U-shaped coils connected in series. Each of the U-shaped coils includes two opposing and spaced-apart slot conductors, each of the slot conductors being disposed in a slot layer of one of the stator slots; In the fourth U-shaped coil, 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 1≤n≤N-1, and n is an odd number; In the third U-shaped coil, the slot layer where one of the slot conductors is located is the m-th layer, and the slot layer where the other slot conductor is located is the (m+1)-th layer, where 2≤m≤N-2, and m is an even 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 1 or 2, characterized in that, Each of the coil assembly's plurality of slot conductors includes a first slot conductor and a second slot conductor, wherein the slot layer in which the first slot conductor is located is the second layer, and the slot layer in which the second slot conductor is located is the (N-1)th layer; In the first U-shaped coil, the slot layers where the two slot conductors are located are both first layers, and the first slot conductors of the two coil assemblies are connected through the two slot conductors of the first U-shaped coil; In the second U-shaped coil, the slot layers where the two slot conductors are located are both the Nth layer, and the second slot conductors of the two coil assemblies are connected through the two slot conductors of the second U-shaped coil.

4. The stator according to claim 1 or 2, characterized in that, In the third U-shaped coil and the two coil groups connected thereto, the slot conductor of one coil group located in the q-th layer is connected to the slot conductor of the third U-shaped coil located in the q+1-th layer, and the slot conductor of the other coil group located in the q+3-th layer is connected to the slot conductor of the third U-shaped coil located in the q+2-th layer, where 1≤q≤N-2 and q is an odd number.

5. The stator according to claim 1 or 2, characterized in that, The number of poles of the stator winding is 2×P, where P is an integer greater than or equal to 3; In the coil group, the number of the fourth U-shaped coils is P-1.

6. The stator according to claim 1 or 2, characterized in that, The pitch of one of the first U-shaped coil and the second U-shaped coil is 5, and the pitch of the other is 7; The pitch of both the third U-shaped coil and the fourth U-shaped coil is 6.

7. The stator according to claim 1 or 2, 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.

8. The stator according to claim 1 or 2, characterized in that, Any two phase windings have the same winding structure, and multiple phase windings are arranged circumferentially along the stator.

9. The stator according to claim 1 or 2, characterized in that, P = 4, N = 6; In the phase winding, multiple winding branches are connected in series.

10. An electric motor, characterized in that, include: The stator as described in any one of claims 1 to 9.

11. A vehicle, characterized in that, include: The motor as described in claim 10.

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