Stator, motor and vehicle

Abstract

The present application relates to the field of motor technology, and the present application provides a stator, a motor and a vehicle. Among them, the stator core of the stator is provided with a plurality of stator slots; each phase winding of the stator winding includes a plurality of winding branches, the winding branches include a plurality of coil assemblies connected in series, and each coil assembly includes a plurality of coil groups; the first coil group and the second coil group each include a plurality of stacked U-shaped coils; in the first coil group, the plurality of U-shaped coils are concentrically arranged; in the second coil group, any two adjacent U-shaped coils among the plurality of U-shaped coils are eccentrically arranged; along the slot depth direction of the stator slot, the stator slot has a plurality of slot layers; the U-shaped coil includes two slot conductors arranged oppositely and at intervals, and each slot conductor is arranged in a slot layer of a stator slot; in the 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+1th layer, and n is an odd number. The present application can reduce the size of the stator winding along the radial direction of the stator.

Description

Technical Field

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

[0002] The motor includes a stator and an oil injection ring. The stator includes a stator winding. The stator winding has multiple coils. There are many types of coils, and the plug-in method of multiple coils is unreasonable. The size of the stator winding in the radial direction of the stator is too large, which will occupy the installation space of the oil injection ring. In order to install the oil injection ring in a limited space, the wall thickness and material input of the oil injection ring are reduced accordingly, which leads to low structural strength and rigidity of the oil injection ring. When the motor is working, the oil injection ring is easy to be damaged, and the service life of the oil injection ring is low, which increases the repair and maintenance cost of the motor. Summary of the invention

[0003] The present application aims to at least solve the technical problem that the radial size of the stator winding is too large in the prior art or related art.

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

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

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

[0007] In view of this, the first aspect of the present application provides a stator, comprising: a stator core, the stator core is provided with a plurality of stator slots; a stator winding, wound on the stator core, the stator winding comprises a plurality of phase windings, each phase winding comprises a plurality of winding branches, each winding branch comprises a plurality of coil assemblies connected in series, the plurality of coil assemblies are stacked in the radial direction of the stator, each coil assembly comprises a plurality of coil groups, the plurality of coil groups are arranged in the circumferential direction of the stator, the plurality of coil groups comprise a first coil group and a second coil group; the first coil group and the second coil group each comprise a plurality of stacked U-shaped coils ; In the first coil group, multiple U-shaped coils are concentrically arranged; in the second coil group, any two adjacent U-shaped coils among the multiple U-shaped coils are eccentrically arranged, and any two adjacent U-shaped coils partially overlap; along the slot depth direction of the stator slot, the stator slot has multiple slot layers; the U-shaped coil includes two slot conductors that are opposite and arranged at intervals, and each slot conductor is arranged in a slot layer of a stator slot; in the 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+1th layer, where n is an odd number; wherein the stator winding includes a flat wire winding.

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

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

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

[0011] Any winding branch of the plurality of winding branches comprises a plurality of coil assemblies, which are connected in series. The plurality of coil assemblies are stacked in the radial direction of the stator. Any coil assembly of the plurality of coil assemblies comprises a plurality of coil groups, which are arranged in the circumferential direction of the stator.

[0012] The types of the multiple coil groups of the coil assembly are divided so that the multiple coil groups include a first coil group and a second coil group. The first coil group includes a plurality of stacked U-shaped coils. The second coil group also includes a plurality of stacked U-shaped coils. The multiple U-shaped coils of the first coil group are concentrically arranged. In the second coil group, any two adjacent U-shaped coils among the multiple U-shaped coils are eccentrically arranged, and any two adjacent U-shaped coils partially overlap.

[0013] Among them, along the slot depth direction of the stator slot, the stator slot has multiple slot layers, and each slot layer is used to accommodate a slot conductor. The U-shaped coil includes two slot conductors, and the two slot conductors are arranged oppositely and at intervals. Each slot conductor cooperates with a slot layer of a stator slot. Specifically, each slot conductor is arranged in a slot layer of a stator slot. In the U-shaped coil, the slot layer where one slot conductor is located is the nth layer, and the slot layer where another slot conductor is located is the n+1th layer. That is to say, along the slot depth direction of the stator slot, the slot layers where the two slot conductors of a U-shaped coil are located are different, and the slot layers where the two slot conductors of a U-shaped coil are located are adjacent layers. It can be seen that the insertion and winding method of the U-shaped coil on the stator core is adjacent layer plug-in. That is, any U-shaped coil in the first coil group is adjacent layer plug-in, and any U-shaped coil in the second coil group is also adjacent layer plug-in.

[0014] The present application reasonably arranges the matching structure of the stator winding and the stator core, so that each U-shaped coil of the stator winding is wound on the stator core by plugging adjacent layers. In this way, the inner diameter of the stator winding can be increased when the outer diameter of the stator winding remains unchanged, and the outer diameter of the stator winding can be reduced when the inner diameter of the stator winding remains unchanged. In other words, this arrangement can reduce the radial size of the stator winding in the stator. In this way, the internal space occupancy rate of the stator winding to the motor can be reduced along the radial direction of the stator when the outer dimensions of the motor remain unchanged, and the installation space of the motor's fuel injection ring can be increased. In this way, the fuel injection ring can improve its own structural strength and rigidity by increasing the material, reduce the probability of damage to the fuel injection ring due to its own low structural strength and rigidity, and is beneficial to extending the service life of the fuel injection ring and reducing the repair and maintenance costs of the motor.

[0015] At the same time, this structural setting makes it possible to directly plug in the stator winding in the same way when it is necessary to increase the number of layers of conductors in the stator slots, without making any additional changes to the plug-in method. In other words, the plug-in method of the stator winding of the present application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator, facilitating the realization of automated production, and thus helping to reduce the production cost of the product.

[0016] Exemplarily, the stator winding comprises a flat wire winding.

[0017] In some technical schemes, optionally, in two adjacent coil assemblies, the last slot conductor of one coil assembly is welded to the first slot conductor of the other coil assembly, and the two welded slot conductors are respectively recorded as the first slot conductor and the second slot conductor, the slot layer where the first slot conductor is located is the mth layer, and the slot layer where the second slot conductor is located is the m+1th layer; wherein, 2≤m≤N-2, m is an even number, N is the number of slot layers of the stator slots, 1≤n≤N, and N is an even number greater than or equal to 4.

[0018] In this technical solution, the positional relationship of multiple coil assemblies in a winding branch is refined.

[0019] Specifically, in the winding branch, a plurality of coil assemblies are stacked in the radial direction of the stator.

[0020] In two adjacent coil assemblies, the last U-shaped coil of one coil assembly is welded and connected to the first U-shaped coil of the other coil assembly, so as to meet the use requirement of connecting multiple coil assemblies in series in each winding branch.

[0021] Specifically, the last in-slot conductor of a coil assembly is welded to the first in-slot conductor of another coil assembly. The two in-slot conductors welded together are respectively recorded as the first in-slot conductor and the second in-slot conductor. The slot layer where the first in-slot conductor is located is the mth layer, and the slot layer where the second in-slot conductor is located is the m+1th layer. 2≤m≤N-2, m is an even number, N is the number of slot layers of the stator slot, 1≤n≤N, and N is an even number greater than or equal to 4. This setting is based on the plug-in method of the U-shaped coil of the coil assembly, which is adjacent layer plug-in, and can meet the use requirements of the two coil assemblies being effectively connected. At the same time, this setting further refines the connection method of the two adjacent coil assemblies, so as to further unify the winding position of the stator winding while ensuring the performance of the stator. This is conducive to standardizing the winding method of the stator winding, and then to realizing automated production and mass production, and to reducing the production cost of the product.

[0022] In some technical schemes, optionally, in the winding branch, the coil assembly closest to the bottom of the stator slot is recorded as the first coil assembly, and the coil assembly farthest from the bottom of the stator slot is recorded as the second coil assembly, the first slot conductor of the first coil assembly is the incoming terminal or the outgoing terminal, and the last slot conductor of the second coil assembly is the outgoing terminal or the incoming terminal.

[0023] In this technical solution, the positional relationship between the incoming terminal and the outgoing terminal in the winding branch is further defined.

[0024] The winding branch includes a plurality of coil assemblies, the plurality of coil assemblies are connected in series, and the plurality of coil assemblies are stacked in the radial direction of the stator.

[0025] The multiple coil components of the winding branch are divided into a first coil component and a second coil component which is closest to the bottom of the stator slot and farthest from the bottom of the stator slot.

[0026] Among them, the first slot conductor of the first coil component is the incoming terminal or the outgoing terminal, and the last slot conductor of the second coil component is the outgoing terminal or the incoming terminal. That is, the first slot conductor of the first coil component (that is, the conductor in the starting slot of the first coil component) is the incoming terminal, and the last slot conductor of the second coil component (that is, the conductor in the last slot of the second coil component) is the outgoing terminal. Alternatively, the first slot conductor of the first coil component (that is, the conductor in the starting slot of the first coil component) is the outgoing terminal, and the last slot conductor of the second coil component (that is, the conductor in the last slot of the second coil component) is the incoming terminal.

[0027] The position setting of the input terminal and the output terminal facilitates the connection of multiple coil assemblies of the winding branch. The wiring method is more flexible and convenient, has the advantage of convenient connection, can simplify the connection structure of multiple coil assemblies of the winding branch, and is beneficial to improving the connection efficiency of the stator winding.

[0028] In some technical solutions, optionally, in any two adjacent coil assemblies of a winding branch, each first coil group of one coil assembly is arranged opposite to a first coil group of the other coil assembly.

[0029] In this technical solution, the matching structure of multiple coil assemblies in the winding branch is further defined.

[0030] In the plurality of coil assemblies of the winding branch, the first coil groups of the plurality of coil assemblies are arranged relative to each other. For example, the winding branch includes a plurality of coil assemblies, each coil assembly includes a plurality of first coil groups. In any two adjacent coil assemblies, each first coil group in one coil assembly is arranged relative to a first coil group in the other coil assembly.

[0031] This arrangement unifies the winding method of multiple coil assemblies of the winding branch, which is simpler, easier to operate, and conducive to mass production.

[0032] At the same time, this structural setting is conducive to achieving the symmetry of the stator winding on the magnetic circuit, eliminating the loop current problem caused by the unbalanced structure of each winding branch, reducing torque fluctuations, reducing the operating noise of the motor, and improving the efficiency of the motor.

[0033] In some technical solutions, optionally, in a winding branch, the numbers of first coil groups of any two coil assemblies are the same.

[0034] In this technical solution, the matching structure of multiple coil assemblies in the winding branch is further defined.

[0035] The numbers of the first coil groups of any two coil assemblies are the same.

[0036] This arrangement is helpful to reduce the difficulty of winding multiple coil components of the winding branch, the winding method is simpler, the operation is convenient, and it is conducive to mass production.

[0037] At the same time, this structural setting is conducive to achieving the symmetry of the stator winding on the magnetic circuit, eliminating the loop current problem caused by the unbalanced structure of each winding branch, reducing torque fluctuations, reducing the operating noise of the motor, and improving the efficiency of the motor.

[0038] In some technical solutions, optionally, in the first coil group, any two of the multiple U-shaped coils have different pitches; in the second coil group, any two of the multiple U-shaped coils have the same pitch.

[0039] In this technical solution, the structures of the first coil group and the second coil group are further defined.

[0040] In the first coil group, the pitches of any two U-shaped coils in the plurality of U-shaped coils are different. For example, the plurality of U-shaped coils are concentrically arranged, and the outer dimensions of the plurality of U-shaped coils gradually increase along the slot depth direction of the stator slot.

[0041] In the second coil group, the multiple U-shaped coils are eccentrically arranged, any two adjacent U-shaped coils partially overlap, and the pitches of any two U-shaped coils in the multiple U-shaped coils are the same.

[0042] This setting further unifies the winding method of the coil assembly, which is simpler, easier to operate, and conducive to mass production.

[0043] For example, in a U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, the stator slot where the conductor in another slot is located is the sixth stator slot, and the pitch of the U-shaped coil is 5.

[0044] For example, in a U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, the stator slot where the conductor in another slot is located is the eighth stator slot, and the pitch of the U-shaped coil is 7.

[0045] For example, in a U-shaped coil, the stator slot where the conductor in one slot is located is the first stator slot, the stator slot where the conductor in another slot is located is the seventh stator slot, and the pitch of the U-shaped coil is 6.

[0046] In some technical schemes, optionally, in the winding branch, the number of coil assemblies is N / 2; in the coil assembly, the number of coil groups is P, the number of first coil groups is Q, and the number of second coil groups is PQ; wherein Q is an odd number, and the number of poles of the stator winding is 2×P.

[0047] In this technical solution, the specific parameters of the stator are further refined.

[0048] In the winding branch, the number of coil assemblies is N / 2, the number of slot layers of the stator slot is N, 1≤n≤N, N is an even number greater than or equal to 4, and n is an odd number.

[0049] In the coil assembly, the number of coil groups is P, the number of first coil groups is Q, and the number of second coil groups is PQ. That is, the P coil groups are divided into types, and the P coil groups include Q first coil groups and PQ second coil groups.

[0050] Wherein, Q is an odd number, and the number of poles of the stator winding is 2×P. That is, the number of coil groups is associated with the number of poles of the stator winding, the number of first coil groups is associated with the number of poles of the stator winding, and the number of second coil groups is associated with the number of poles of the stator winding.

[0051] In some technical schemes, optionally, P=4, N=6; Q=1, or Q=3; in the first coil group, the number of U-shaped coils is 2, the pitch of one U-shaped coil is 5, and the pitch of the other U-shaped coil is 7; in the second coil group, the number of U-shaped coils is 2, and the pitch of the U-shaped coils is 6; in the coil assembly, the welding pitch of the two U-shaped coils is 6.

[0052] In this technical solution, specific parameters of the stator are further defined.

[0053] P=4, N=6, Q=1. Or, P=4, N=6, Q=3.

[0054] In the first coil group, the number of U-shaped coils is 2, the two U-shaped coils are stacked, the two U-shaped coils are concentrically arranged, the pitch of one U-shaped coil is 5, and the pitch of the other U-shaped coil is 7.

[0055] In the second coil group, the number of the U-shaped coils is 2, the two U-shaped coils are stacked, the two U-shaped coils are eccentrically arranged, the two U-shaped coils partially overlap, and the pitches of the two U-shaped coils are both 6.

[0056] In the coil assembly, the welding pitch of the two U-shaped coils is 6. The two U-shaped coils are respectively recorded as a first U-shaped coil and a second U-shaped coil, and a slot conductor of the first U-shaped coil (recorded as a first slot conductor) and a slot conductor of the second U-shaped coil (recorded as a second slot conductor) are welded and connected through a welding conductor.

[0057] 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.

[0058] 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.

[0059] In some technical solutions, optionally, in a phase winding, the winding structures of any two winding branches are the same, and a plurality of winding branches are arranged along the circumference of the stator.

[0060] In this technical solution, the structure of the phase winding is further defined.

[0061] In the phase winding, the winding structure of any two winding branches is the same. Multiple winding branches of the phase winding are arranged along the circumference of the stator. For example, two adjacent winding branches partially overlap. The winding structure of any two winding branches is the same, which can also be said that the winding method of any two winding branches is the same.

[0062] That is to say, in the phase winding, one winding branch can overlap with another winding branch after rotating a certain angle along the circumference of the stator.

[0063] This setting simplifies the winding method of the stator winding, is easy to operate, is conducive to improving the assembly efficiency of the stator, and is conducive to mass production.

[0064] In some technical solutions, optionally, the winding structures of any two phase windings are the same, and the multiple phase windings are arranged along the circumferential direction of the stator.

[0065] In this technical solution, the structure of the stator winding is further defined.

[0066] The winding structures of any two phase windings are the same. Multiple phase windings are arranged along the circumference of the stator. For example, two adjacent phase windings partially overlap. The winding structures of any two phase windings are the same, or in other words, the winding methods of any two phase windings are the same.

[0067] That is to say, one phase winding can overlap with another phase winding after rotating a certain angle along the circumference of the stator.

[0068] This setting simplifies the winding method of the stator winding, is easy to operate, is conducive to improving the assembly efficiency of the stator, and is conducive to mass production.

[0069] In some technical solutions, optionally, multiple winding branches of a phase winding are connected in parallel; or multiple winding branches of a phase winding are connected in series.

[0070] In this technical solution, the connection structure of multiple winding branches of the phase winding is further defined.

[0071] A plurality of winding branches of a phase winding are connected in parallel.

[0072] Alternatively, a plurality of winding branches of a phase winding are connected in series.

[0073] In some technical solutions, optionally, each U-shaped coil also includes a connecting conductor and two welding conductors, the connecting conductor connects the first ends of the two slot conductors, and each welding conductor is connected to the second end of a slot conductor; of the two welding conductors of the U-shaped coil, one welding conductor is bent along a first direction, and the other welding conductor is bent along a second direction.

[0074] In the technical solution, the structure of the U-shaped coil is further defined. Each U-shaped coil further includes a connecting conductor and two welding conductors, the connecting conductor connects the first ends of the two in-slot conductors, and each welding conductor is connected to the second end of one in-slot conductor.

[0075] In the U-shaped coil, one welding conductor is bent along a first direction, and the other welding conductor is bent along a second direction. That is, the bending directions of the two welding conductors are different. Specifically, the first direction is opposite to the second direction.

[0076] Exemplarily, in the U-shaped coil, along the circumferential direction of the stator, the bending directions of the two welding conductors are opposite and far away from each other.

[0077] A second aspect of the present application provides a motor, comprising: a stator as in the first aspect.

[0078] Since the motor provided in the present application includes the stator as in the first aspect, it has all the beneficial effects of the above-mentioned stator, which will not be described one by one here.

[0079] A third aspect of the present application provides a vehicle, comprising: a motor as in the second aspect.

[0080] The vehicle provided in the present application includes the motor as in the second aspect and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0081] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles and hydrogen engine vehicles.

[0082] The vehicle may also be a fuel-powered vehicle.

[0083] The motor of the present application is a driving motor of a vehicle, which is used to provide power to the vehicle.

[0084] Additional aspects and advantages of the present application will become apparent in the following description or will be understood through the practice of the present application. In the present application, by defining the structure of the stator winding, any winding branch of the stator winding includes a plurality of coil assemblies, and the types of the plurality of coil assemblies of the coil assemblies are divided so that the plurality of coil assemblies include a first coil assembly and a second coil assembly. It is also defined that any U-shaped coil in the first coil assembly is plugged into adjacent layers, and any U-shaped coil in the second coil assembly is also plugged into adjacent layers. That is, each U-shaped coil of the stator winding is wound on the stator core in an adjacent layer plug-in manner, so that the inner diameter of the stator winding can be increased while the outer diameter of the stator winding remains unchanged, and the outer diameter of the stator winding can be reduced while the inner diameter of the stator winding remains unchanged. In other words, this arrangement can reduce the radial size of the stator winding in the stator, so that the internal space occupancy rate of the stator winding to the motor can be reduced along the radial direction of the stator while the outer dimensions of the motor remain unchanged, and the installation space of the motor's fuel injection ring can be increased. In this way, the fuel injection ring can improve its own structural strength and rigidity by increasing the material, reduce the probability of damage to the fuel injection ring due to its own low structural strength and rigidity, and is beneficial to extending the service life of the fuel injection ring and reducing the repair and maintenance costs of the motor. At the same time, this structural setting makes it possible to directly plug in the stator winding in the same way when it is necessary to increase the number of layers of conductors in the stator slots, without making any additional changes to the plug-in method. In other words, the plug-in method of the stator winding of the present application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator, facilitating the realization of automated production, and thus helping to reduce the production cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0086] Figure 1 A schematic structural diagram of a stator according to an embodiment of the present application is shown;

[0087] Figure 2 A partial structural schematic diagram of a stator according to an embodiment of the present application is shown;

[0088] Figure 3A schematic structural diagram of a first coil assembly according to an embodiment of the present application is shown;

[0089] Figure 4 A schematic structural diagram of a second coil assembly according to an embodiment of the present application is shown;

[0090] Figure 5 A schematic diagram of winding a winding branch circuit according to an embodiment of the present application is shown;

[0091] Figure 6 for Figure 5 A partial enlarged view of T1 of the winding branch shown;

[0092] Figure 7 for Figure 5 A partial enlarged view of the winding branch at T2 shown;

[0093] Figure 8 for Figure 5 A partial enlarged view of the winding branch at T3 shown;

[0094] Fig. 9 for Figure 5 A partial enlarged view of the winding branch at T4 is shown;

[0095] Fig.10 A connection diagram of the first parallel branch of the U-phase winding of an embodiment of the present application is shown;

[0096] Fig.11 for Fig.10 A partial enlarged view of T5 of the first parallel branch of the U-phase winding is shown;

[0097] Fig.12 for Fig.10 A partial enlarged view of T6 of the first parallel branch of the U-phase winding is shown;

[0098] Fig.13 for Fig.10 A partial enlarged view of T7 of the first parallel branch of the U-phase winding is shown;

[0099] Fig.14 for Fig.10 A partial enlarged view of T8 of the first parallel branch of the U-phase winding is shown;

[0100] Fig.15 A connection diagram of the first parallel branch of the V-phase winding of an embodiment of the present application is shown;

[0101] Fig.16 for Fig.15 A partial enlarged view of T9 of the first parallel branch of the V-phase winding is shown;

[0102] Fig.17 for Fig.15 A partial enlarged view of T10 of the first parallel branch of the V-phase winding is shown;

[0103] Fig.18 for Fig.15 A partial enlarged view of T11 of the first parallel branch of the V-phase winding is shown;

[0104] Fig.19 for Fig.15 A partial enlarged view of T12 of the first parallel branch of the V-phase winding is shown.

[0105] in, Figures 1 to 19 The corresponding relationship between the reference numerals and component names in the figure is:

[0106] 1 stator, 10 stator core, 100 stator slot, 110 slot layer, 120 slot bottom of stator slot, 20 stator winding, 22 phase winding, 200 winding branch, 210 coil assembly, 210a first coil assembly, 210b second coil assembly, 212 coil group, 212a first coil group, 212b second coil group, 2122 U-shaped coil, 2124 conductor in the slot, 2126 connecting conductor, 2128 welding conductor, S1 indicates radial direction, S2 indicates circumferential direction, S3 indicates slot depth direction, S4 indicates first direction, and S5 indicates second direction. DETAILED DESCRIPTION

[0107] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0108] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0109] Refer to the following Figures 1 to 19 The stator 1 , the motor and the vehicle according to some embodiments of the present application are described.

[0110] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, a stator 1 is provided, and the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 is provided with a plurality of stator slots 100.

[0111] The stator winding 20 is wound around the stator core 10 .

[0112] The stator winding 20 includes a plurality of phase windings 22 .

[0113] Each phase winding 22 includes a plurality of winding branches 200 .

[0114] Each winding branch 200 includes a plurality of coil assemblies 210 connected in series.

[0115] The plurality of coil assemblies 210 are stacked in the radial direction of the stator 1 .

[0116] Each coil assembly 210 includes a plurality of coil groups 212 .

[0117] The plurality of coil groups 212 are arranged along the circumferential direction of the stator 1 .

[0118] like Figure 3 and Figure 4 As shown, the plurality of coil assemblies 212 include a first coil assembly 212a and a second coil assembly 212b.

[0119] The first coil group 212 a and the second coil group 212 b each include a plurality of stacked U-shaped coils 2122 .

[0120] In the first coil group 212a, a plurality of U-shaped coils 2122 are concentrically arranged.

[0121] In the second coil group 212 b , any two adjacent U-shaped coils 2122 among the plurality of U-shaped coils 2122 are eccentrically disposed, and any two adjacent U-shaped coils 2122 partially overlap.

[0122] The stator slot 100 has a plurality of slot layers 110 along a slot depth direction of the stator slot 100 .

[0123] The U-shaped coil 2122 includes two slot conductors 2124 that are arranged opposite to each other and spaced apart.

[0124] Each in-slot conductor 2124 passes through a slot layer 110 of a stator slot 100 .

[0125] In the U-shaped coil 2122 , the slot layer 110 where one slot conductor 2124 is located is the nth layer, and the slot layer 110 where another slot conductor 2124 is located is the n+1th layer, where n is an odd number.

[0126] The stator winding 20 includes a flat wire winding.

[0127] The present application provides a stator 1 including a stator core 10 and a stator winding 20. The stator winding 20 is wound around the stator core 10.

[0128] It can be understood that the stator core 10 is provided with a plurality of stator slots 100 , and the plurality of stator slots 100 are arranged at intervals along the circumferential direction of the stator 1 .

[0129] The stator winding 20 includes a plurality of phase windings 22 , and any phase winding 22 of the plurality of phase windings 22 includes a plurality of winding branches 200 .

[0130] Any winding branch 200 of the plurality of winding branches 200 includes a plurality of coil assemblies 210, which are connected in series. The plurality of coil assemblies 210 are stacked in the radial direction of the stator 1. Any coil assembly 210 of the plurality of coil assemblies 210 includes a plurality of coil groups 212, which are arranged in the circumferential direction of the stator 1.

[0131] The types of the plurality of coil groups 212 of the coil assembly 210 are divided so that the plurality of coil groups 212 include a first coil group 212a and a second coil group 212b. The first coil group 212a includes a plurality of stacked U-shaped coils 2122. The second coil group 212b also includes a plurality of stacked U-shaped coils 2122. The plurality of U-shaped coils 2122 of the first coil group 212a are concentrically arranged. In the second coil group 212b, any two adjacent U-shaped coils 2122 of the plurality of U-shaped coils 2122 are eccentrically arranged, and any two adjacent U-shaped coils 2122 partially overlap.

[0132] The stator slot 100 has a plurality of slot layers 110 along the slot depth direction of the stator slot 100, and each slot layer 110 is used to accommodate a slot conductor 2124. The U-shaped coil 2122 includes two slot conductors 2124, which are arranged opposite to each other and spaced apart. Each slot conductor 2124 matches with a slot layer 110 of a stator slot 100. Specifically, each slot conductor 2124 is arranged in a slot layer 110 of a stator slot 100. In the U-shaped coil 2122, the slot layer 110 where one slot conductor 2124 is located is the nth layer, and the slot layer 110 where another slot conductor 2124 is located is the n+1th layer. That is, along the slot depth direction of the stator slot 100, the slot layers 110 where the two slot conductors 2124 of a U-shaped coil 2122 are located are different, and the slot layers 110 where the two slot conductors 2124 of a U-shaped coil 2122 are located are adjacent layers. It can be seen that the U-shaped coils 2122 are wound on the stator core 10 in an adjacent layer plug-in manner. That is, any U-shaped coil 2122 in the first coil group 212a is plug-in in adjacent layers, and any U-shaped coil 2122 in the second coil group 212b is also plug-in in adjacent layers.

[0133] The present application reasonably arranges the matching structure of the stator winding 20 and the stator core 10, so that each U-shaped coil 2122 of the stator winding 20 is wound on the stator core 10 by plugging adjacent layers. In this way, the inner diameter of the stator winding 20 can be increased when the outer diameter of the stator winding 20 remains unchanged, and the outer diameter of the stator winding 20 can be reduced when the inner diameter of the stator winding 20 remains unchanged. In other words, this arrangement can reduce the radial size of the stator winding 20 of the stator 1. In this way, the internal space occupancy rate of the stator winding 20 to the motor can be reduced along the radial direction of the stator 1 when the outer dimensions of the motor remain unchanged, and the installation space of the motor's oil injection ring can be increased. In this way, the oil injection ring can improve its own structural strength and rigidity by increasing the material, reduce the probability of damage to the oil injection ring due to its own low structural strength and rigidity, and is beneficial to extending the service life of the oil injection ring and reducing the repair and maintenance costs of the motor.

[0134] At the same time, this structural setting makes it possible to directly plug in the stator winding 20 in the same plug-in method when it is necessary to increase the number of layers of the in-slot conductor 2124 in the stator slot 100, without making any additional changes to the plug-in method. In other words, the plug-in method of the stator winding 20 of the present application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator 1, facilitating the realization of automated production, and thus helping to reduce the production cost of the product.

[0135] For example, in the U-shaped coil 2122, the slot layer 110 where one slot conductor 2124 is located is the L1 layer (i.e., the 1st layer), and the slot layer 110 where another slot conductor 2124 is located is the L2 layer (i.e., the 2nd layer). For example, in the U-shaped coil 2122, the slot layer 110 where one slot conductor 2124 is located is the L3 layer (i.e., the 3rd layer), and the slot layer 110 where another slot conductor 2124 is located is the L4 layer (i.e., the 4th layer). They are not listed here one by one. That is, the U-shaped coil 2122 is connected in adjacent layers.

[0136] in, Figure 2 L1, L2, L3, L4, L5 and L6 in the figure represent the slot conductors 2124 in different slot layers.

[0137] The slot depth direction of the stator slot 100 refers to the direction from the slot opening of the stator slot 100 to the slot bottom 120 of the stator slot. The slot depth direction of the stator slot 100 also refers to the direction from the slot bottom 120 of the stator slot to the slot opening of the stator slot 100.

[0138] Exemplarily, the stator winding 20 includes a flat wire winding.

[0139] The present embodiment provides a stator 1. In addition to the technical features of the above-mentioned embodiments, the present embodiment further includes the following technical features: in two adjacent coil assemblies 210, the last in-slot conductor 2124 of one coil assembly 210 is welded to the first in-slot conductor 2124 of the other coil assembly 210, and the two welded in-slot conductors 2124 are respectively recorded as a first in-slot conductor and a second in-slot conductor, the slot layer 110 where the first in-slot conductor is located is the mth layer, and the slot layer 110 where the second in-slot conductor is located is the m+1th layer; wherein, 2≤m≤N-2, m is an even number, N is the number of slot layers 110 of the stator slot 100, 1≤n≤N, and N is an even number greater than or equal to 4.

[0140] In this embodiment, the positional relationship of the plurality of coil assemblies 210 in the winding branch 200 is refined.

[0141] Specifically, in the winding branch 200 , a plurality of coil assemblies 210 are stacked in the radial direction of the stator 1 .

[0142] In two adjacent coil assemblies 210 , the last U-shaped coil 2122 of one coil assembly 210 is welded to the first U-shaped coil 2122 of the other coil assembly 210 , so as to meet the use requirement of connecting multiple coil assemblies 210 in series in each winding branch 200 .

[0143] Specifically, the last in-slot conductor 2124 of one coil assembly 210 is welded to the first in-slot conductor 2124 of another coil assembly 210. The two in-slot conductors 2124 welded to each other are respectively recorded as the first in-slot conductor and the second in-slot conductor, the slot layer 110 where the first in-slot conductor is located is the mth layer, the slot layer 110 where the second in-slot conductor is located is the m+1th layer, 2≤m≤N-2, m is an even number, N is the number of slot layers 110 of the stator slot 100, 1≤n≤N, N is an even number greater than or equal to 4. This setting is based on the plug-in method of the U-shaped coil 2122 of the coil assembly 212 being adjacent layer plug-in, and can meet the use requirements of effectively connecting the two coil assemblies 210. At the same time, this setting further refines the connection method of the two adjacent coil assemblies 210, so as to further unify the winding position of the stator winding 20 while ensuring the performance of the stator 1. This is conducive to standardizing the winding method of the stator winding 20, and then to realizing automated production and mass production, which is conducive to reducing the production cost of the product.

[0144] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: Figure 3As shown, each U-shaped coil 2122 also includes a connecting conductor 2126 and two welding conductors 2128, the connecting conductor 2126 connects the first ends of the two slot conductors 2124, and each welding conductor 2128 is connected to the second end of a slot conductor 2124; of the two welding conductors 2128 of the U-shaped coil 2122, one welding conductor 2128 is bent along a first direction, and the other welding conductor 2128 is bent along a second direction.

[0145] In this embodiment, the structure of the U-shaped coil 2122 is further defined. Each U-shaped coil 2122 further includes a connecting conductor 2126 and two welding conductors 2128 . The connecting conductor 2126 connects the first ends of the two in-slot conductors 2124 , and each welding conductor 2128 is connected to the second end of one in-slot conductor 2124 .

[0146] In the U-shaped coil 2122, one welding conductor 2128 is bent along a first direction, and the other welding conductor 2128 is bent along a second direction. That is, the bending directions of the two welding conductors 2128 are different. Specifically, the first direction is opposite to the second direction.

[0147] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: Figure 2 As shown, in the winding branch 200 , the coil assembly 210 closest to the slot bottom 120 of the stator slot is recorded as the first coil assembly 210 a , and the coil assembly 210 farthest from the slot bottom 120 of the stator slot is recorded as the second coil assembly 210 b .

[0148] The first in-slot conductor 2124 of the first coil assembly 210 a is an incoming terminal or an outgoing terminal.

[0149] The last in-slot conductor 2124 of the second coil assembly 210 b is an outlet terminal or an inlet terminal.

[0150] In this embodiment, the positional relationship between the incoming terminal and the outgoing terminal in the winding branch 200 is further defined.

[0151] The winding branch 200 includes a plurality of coil assemblies 210 , which are connected in series and stacked in the radial direction of the stator 1 .

[0152] The multiple coil components 210 of the winding branch 200 are divided into a first coil component 210 a and a second coil component 210 b . The coil component 210 closest to the bottom 120 of the stator slot is recorded as a first coil component 210 a , and the coil component 210 farthest from the bottom 120 of the stator slot is recorded as a second coil component 210 b .

[0153] The first in-slot conductor 2124 of the first coil component 210a is an in-line terminal or an out-line terminal, and the last in-slot conductor 2124 of the second coil component 210b is an out-line terminal or an in-line terminal. That is, the first in-slot conductor 2124 of the first coil component 210a (the first in-slot conductor 2124 is the in-slot conductor at the start of the first coil component 210a) is an in-line terminal, and the last in-slot conductor 2124 of the second coil component 210b (the last in-slot conductor 2124 is the in-slot conductor at the end of the second coil component 210b) is an out-line terminal. Alternatively, the first in-slot conductor 2124 of the first coil component 210a (the first in-slot conductor 2124 is the in-slot conductor at the start of the first coil component 210a) is an out-line terminal, and the last in-slot conductor 2124 of the second coil component 210b (the last in-slot conductor 2124 is the in-slot conductor at the end of the second coil component 210b) is an in-line terminal.

[0154] The position setting of the input terminal and the output terminal facilitates the connection of multiple coil assemblies 210 of the winding branch 200. The wiring method is more flexible and convenient, has the advantage of convenient connection, can simplify the connection structure of multiple coil assemblies 210 of the winding branch 200, and is beneficial to improving the connection efficiency of the stator winding 20.

[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: in any two adjacent coil assemblies 210 of the winding branch 200, each first coil group 212a of one coil assembly 210 is arranged opposite to a first coil group 212a of the other coil assembly 210.

[0156] In this embodiment, the matching structure of the plurality of coil assemblies 210 in the winding branch 200 is further defined.

[0157] In the plurality of coil assemblies 210 of the winding branch 200, the first coil groups 212a of the plurality of coil assemblies 210 are arranged relative to each other. For example, the winding branch 200 includes a plurality of coil assemblies 210, and each coil assembly 210 includes a plurality of first coil groups 212a. In any two adjacent coil assemblies 210, each first coil group 212a in one coil assembly 210 is arranged relative to a first coil group 212a in another coil assembly 210.

[0158] This arrangement unifies the winding method of the multiple coil assemblies 210 of the winding branch 200, which is simpler, easier to operate, and is conducive to mass production.

[0159] At the same time, this structural setting is conducive to achieving the symmetry of the stator winding 20 in the magnetic circuit, eliminating the loop current problem caused by the unbalanced structure of each winding branch, reducing torque fluctuations, reducing the operating noise of the motor, and improving the efficiency of the motor.

[0160] 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 200, the numbers of the first coil groups 212a of any two coil assemblies 210 are the same.

[0161] In this embodiment, the matching structure of the plurality of coil assemblies 210 in the winding branch 200 is further defined.

[0162] Any two coil assemblies 210 have the same number of first coil groups 212 a.

[0163] This arrangement is helpful to reduce the difficulty of winding the multiple coil assemblies 210 of the winding branch 200, the winding method is simpler, the operation is convenient, and it is conducive to mass production.

[0164] At the same time, this structural setting is conducive to achieving the symmetry of the stator winding 20 in the magnetic circuit, eliminating the loop current problem caused by the unbalanced structure of each winding branch, reducing torque fluctuations, reducing the operating noise of the motor, and improving the efficiency of the motor.

[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: in the first coil group 212a, the pitches of any two of the multiple U-shaped coils 2122 are different.

[0166] In the second coil group 212 b , any two of the plurality of U-shaped coils 2122 have the same pitch.

[0167] In this embodiment, the structures of the first coil group 212a and the second coil group 212b are further defined.

[0168] In the first coil group 212a, the pitches of any two U-shaped coils 2122 in the plurality of U-shaped coils 2122 are different. For example, the plurality of U-shaped coils 2122 are concentrically arranged, and along the slot depth direction of the stator slot 100, the outer dimensions of the plurality of U-shaped coils 2122 gradually increase.

[0169] In the second coil group 212 b , the plurality of U-shaped coils 2122 are eccentrically arranged, any two adjacent U-shaped coils 2122 partially overlap, and any two of the plurality of U-shaped coils 2122 have the same pitch.

[0170] This arrangement further unifies the winding method of the coil assembly 210 , making the winding method simpler, easier to operate, and more conducive to mass production.

[0171] For example, in the U-shaped coil 2122 , the stator slot 100 where one slot conductor 2124 is located is the first stator slot, and the stator slot 100 where another slot conductor 2124 is located is the sixth stator slot, and the pitch of the U-shaped coil 2122 is 5.

[0172] For example, in the U-shaped coil 2122 , the stator slot 100 where one slot conductor 2124 is located is the first stator slot, and the stator slot 100 where another slot conductor 2124 is located is the eighth stator slot, and the pitch of the U-shaped coil 2122 is 7.

[0173] For example, in the U-shaped coil 2122 , the stator slot 100 where one slot conductor 2124 is located is the first stator slot, and the stator slot 100 where another slot conductor 2124 is located is the seventh stator slot, and the pitch of the U-shaped coil 2122 is 6.

[0174] 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 200, the number of coil assemblies 210 is N / 2, the number of slot layers 110 of the stator slot 100 is N, 1≤n≤N, and N is an even number greater than or equal to 4.

[0175] In the coil assembly 210 , the number of the coil groups 212 is P, the number of the first coil groups 212 a is Q, and the number of the second coil groups 212 b is PQ.

[0176] Here, Q is an odd number, and the number of poles of the stator winding 20 is 2×P.

[0177] In this embodiment, specific parameters of the stator 1 are further refined.

[0178] In the winding branch 200, the number of coil assemblies 210 is N / 2, the number of slot layers 110 of the stator slot 100 is N, 1≤n≤N, N is an even number greater than or equal to 4, and n is an odd number, such as N=4, N=6, and N=8, etc., which are not listed here one by one.

[0179] In the coil assembly 210, the number of coil groups 212 is P, the number of first coil groups 212a is Q, and the number of second coil groups 212b is PQ. That is, the P coil groups 212 are divided into types, and the P coil groups 212 include Q first coil groups 212a and PQ second coil groups 212b.

[0180] Wherein, Q is an odd number, and the number of poles of the stator winding 20 is 2×P. That is, the number of coil groups 212 is associated with the number of poles of the stator winding 20, the number of first coil groups 212a is associated with the number of poles of the stator winding 20, and the number of second coil groups 212b is associated with the number of poles of the stator winding 20.

[0181] This embodiment provides a stator 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: P=4, N=6; Q=1, or Q=3.

[0182] In the first coil group 212 a , the number of the U-shaped coils 2122 is 2, the pitch of one U-shaped coil 2122 is 5, and the pitch of the other U-shaped coil 2122 is 7.

[0183] In the second coil group 212 b , the number of the U-shaped coils 2122 is 2, and the pitch of the U-shaped coils 2122 is 6.

[0184] In the coil assembly 210 , the welding pitch of the two U-shaped coils 2122 is 6.

[0185] In this embodiment, specific parameters of the stator 1 are further defined.

[0186] P=4, N=6, Q=1. Or, P=4, N=6, Q=3.

[0187] In the first coil group 212 a , the number of the U-shaped coils 2122 is 2, the two U-shaped coils 2122 are stacked, the two U-shaped coils 2122 are concentrically arranged, the pitch of one U-shaped coil 2122 is 5, and the pitch of the other U-shaped coil 2122 is 7.

[0188] In the second coil group 212 b , the number of the U-shaped coils 2122 is 2, the two U-shaped coils 2122 are stacked, the two U-shaped coils 2122 are eccentrically arranged, the two U-shaped coils 2122 partially overlap, and the pitch of the two U-shaped coils 2122 is 6.

[0189] In the coil assembly 210, the welding pitch of the two U-shaped coils 2122 is 6. The two U-shaped coils 2122 are respectively recorded as a first U-shaped coil and a second U-shaped coil, and a slot conductor 2124 (recorded as a first slot conductor) of the first U-shaped coil is connected to a slot conductor 2124 (recorded as a second slot conductor) of the second U-shaped coil by welding.

[0190] For example, the stator slot 100 where the first slot conductor is located is the first stator slot, the stator slot 100 where the second slot conductor is located is the seventh stator slot, and the welding pitch of the two U-shaped coils 2122 is 6.

[0191] 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 2122 is 6.

[0192] This embodiment provides a stator 1. In addition to the technical features of the above-mentioned embodiments, this embodiment further includes the following technical features: in the phase winding 22, the winding structures of any two winding branches 200 are the same, and multiple winding branches 200 are arranged along the circumference of the stator 1.

[0193] In this embodiment, the structure of the phase winding 22 is further defined.

[0194] In the phase winding 22, any two winding branches 200 have the same winding structure. The multiple winding branches 200 of the phase winding 22 are arranged along the circumferential direction of the stator 1. For example, two adjacent winding branches 200 partially overlap. The winding structures of any two winding branches 200 are the same, which means that the winding methods of any two winding branches 200 are the same.

[0195] That is to say, in the phase winding 22 , one winding branch 200 can overlap with another winding branch 200 after rotating a certain angle along the circumferential direction of the stator 1 .

[0196] This arrangement simplifies the winding method of the stator winding 20 , facilitates operation, is beneficial to improving the assembly efficiency of the stator 1 , and is beneficial to achieving mass production.

[0197] 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 winding structures of any two phase windings 22 are the same, and multiple phase windings 22 are arranged along the circumferential direction of the stator 1.

[0198] In this embodiment, the structure of the stator winding 20 is further defined.

[0199] The winding structures of any two phase windings 22 are the same. The multiple phase windings 22 are arranged along the circumferential direction of the stator 1. For example, two adjacent phase windings 22 partially overlap. The winding structures of any two phase windings 22 are the same, that is, the winding methods of any two phase windings 22 are the same.

[0200] That is to say, one phase winding 22 can overlap with another phase winding 22 after rotating by a certain angle along the circumferential direction of the stator 1 .

[0201] This arrangement simplifies the winding method of the stator winding 20 , facilitates operation, is beneficial to improving the assembly efficiency of the stator 1 , and is beneficial to achieving mass production.

[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: a plurality of winding branches 200 of a phase winding 22 are connected in parallel.

[0203] Alternatively, a plurality of winding branches 200 of a phase winding 22 are connected in series.

[0204] In this embodiment, a connection structure of a plurality of winding branches 200 of the phase winding 22 is further defined.

[0205] The plurality of winding branches 200 of the phase winding 22 are connected in parallel.

[0206] Alternatively, a plurality of winding branches 200 of a phase winding 22 are connected in series.

[0207] According to some further embodiments of the present application, a motor is provided. The motor includes a stator 1 as in any of the above embodiments.

[0208] Since the motor provided in the present application includes the stator 1 as in any of the above embodiments, it has all the beneficial effects of the above stator 1, which will not be described one by one here.

[0209] According to some further embodiments of the present application, a vehicle is provided. The vehicle includes a motor as described in the above embodiments.

[0210] The vehicle provided in the present application includes a motor as in the above-mentioned embodiment, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0211] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles and hydrogen engine vehicles.

[0212] The vehicle may also be a fuel-powered vehicle.

[0213] The motor of the present application is a driving motor of a vehicle, which is used to provide power to the vehicle.

[0214] Exemplarily, the stator 1 of the present application includes a stator core 10 and a stator winding 20. The stator winding 20 includes a plurality of U-shaped coils 2122, which are wound on the stator core 10 in a cross-layer plug-in manner. By reducing the size of the stator winding 20 along the radial direction of the stator 1, the internal space occupancy rate of the stator winding 20 on the motor can be reduced, and the installation space of the motor's fuel injection ring can be increased. In this way, the fuel injection ring can improve its own structural strength and rigidity by increasing the material, reduce the probability of damage to the fuel injection ring due to its own low structural strength and rigidity, help to extend the service life of the fuel injection ring, and help to reduce the repair and maintenance costs of the motor.

[0215] Exemplarily, the stator core 10 is provided with 12×P stator slots 100 , and the 12×P stator slots 100 are arranged along the circumferential direction of the stator 1 , where P is an integer greater than or equal to 3.

[0216] Exemplarily, the stator winding 20 is formed by sequentially welding a plurality of U-shaped coils 2122. Each U-shaped coil 2122 includes two in-slot conductors 2124, two welding conductors 2128, and a connecting conductor 2126. The two in-slot conductors 2124 are arranged opposite to each other and spaced apart, the first ends of the two in-slot conductors 2124 are connected by the connecting conductor 2126, and the second end of each in-slot conductor 2124 is connected to a welding conductor 2128.

[0217] Exemplarily, along the slot depth direction of the stator slot 100, the stator slot 100 has N slot layers 110, each slot layer 110 is inserted with a slot conductor 2124, and N is an even number greater than or equal to 4. N slot conductors 2124 are arranged in each stator slot 100, and the N slot conductors 2124 are recorded as L1, L2, L3...LN-1 and LN. L1 to LN can be named from the direction from the slot opening of the stator slot 100 to the slot bottom 120 of the stator slot. L1 to LN can also be named from the direction from the slot bottom 120 of the stator slot to the slot opening of the stator slot 100.

[0218] Exemplarily, the number of phases of the phase winding 22 of the stator winding 20 is 3. The number of poles of the stator winding 20 is 2×P. Each phase winding 22 includes two winding branches 200 connected in parallel. Each winding branch 200 includes N / 2 coil assemblies 210 (m, a, c), and the N / 2 coil assemblies 210 (m, a, c) are connected in series. The stator winding 20 has a total of 3×N coil assemblies 210 (m, a, c). Among them, m is the number of phase windings 22, and m traverses integers from 1 to 3. a is the number of U-shaped coils 2122 of the coil assembly 212, and a traverses integers from 1 to 2. c traverses integers between 1 and N / 2.

[0219] Each coil assembly 210 (m, a, c) includes P coil groups 212. The P coil groups 212 include Q first coil groups 212a and PQ second coil groups 212b. The first coil group 212a includes a plurality of stacked U-shaped coils 2122, and the plurality of U-shaped coils 2122 are concentrically arranged. The second coil group 212b includes a plurality of stacked U-shaped coils 2122, and the plurality of U-shaped coils 2122 are eccentrically arranged, and Q is an odd number between 1 and P. The first coil group 212a includes 2 U-shaped coils 2122, and the second coil group 212b includes 2 U-shaped coils 2122.

[0220] For example, in the first coil group 212a, the pitch of one U-shaped coil 2122 is 5, and the pitch of the other U-shaped coil 2122 is 7. In the second coil group 212b, the pitches of the two U-shaped coils 2122 are both 6. The two welding conductors 2128 of the U-shaped coil 2122 are bent in opposite directions.

[0221] In the U-shaped coil 2122 , the slot layer 110 where one slot conductor 2124 is located is the nth layer, and the slot layer 110 where another slot conductor 2124 is located is the n+1th layer, where n is an odd number, 1≤n≤N, and N is an even number greater than or equal to 4.

[0222] All the U-shaped coils 2122 of the coil assembly 210 are sequentially welded and connected via welding conductors 2128. In the coil assembly 210, the welding pitch of the two U-shaped coils 2122 is 6.

[0223] In the coil assembly 210 , the first in-slot conductor 2124 and the last in-slot conductor 2124 are not connected.

[0224] In two adjacent coil assemblies 210, the last U-shaped coil 2122 of one coil assembly 210 is welded to the first U-shaped coil 2122 of the other coil assembly 210, and the two welded in-slot conductors 2124 are respectively recorded as the first in-slot conductor and the second in-slot conductor. The slot layer 110 of the stator slot 100 where the first in-slot conductor is located is the mth layer, and the slot layer 110 of the stator slot 100 where the second in-slot conductor is located is the m+1th layer, where m is an even number traversed from 2 to N-2.

[0225] Exemplarily, in the winding branch 200, the coil component 210 that is closest to the bottom 120 of the stator slot is recorded as the first coil component 210a, and the coil component 210 that is farthest from the bottom 120 of the stator slot is recorded as the second coil component 210b. The first in-slot conductor 2124 of the first coil component 210a is an incoming terminal or an outgoing terminal, and the last in-slot conductor 2124 of the second coil component 210b is an outgoing terminal or an incoming terminal.

[0226] Therefore, the multiple U-shaped coils 2122 of the stator winding 20 of the present application are all plugged in adjacent layers during plugging, so that the size of the stator winding 20 can be reduced along the radial direction of the stator 1.

[0227] At the same time, this structural setting makes it possible to directly plug in the stator winding 20 in the same plug-in method when it is necessary to increase the number of layers of the in-slot conductor 2124 in the stator slot 100, without making any additional changes to the plug-in method. In other words, the plug-in method of the stator winding 20 of the present application is more flexible and convenient for winding, which is conducive to improving the assembly efficiency of the stator 1, facilitating the realization of automated production, and thus helping to reduce the production cost of the product.

[0228] Exemplarily, in the winding branch 200 , any two coil assemblies 210 have the same number of first coil assemblies 212 a .

[0229] Exemplarily, in any two adjacent coil assemblies 210 of the winding branch 200 , each first coil group 212 a of one coil assembly 210 is arranged opposite to a first coil group 212 a of the other coil assembly 210 .

[0230] Exemplarily, each winding branch 200 of the 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 the plurality of winding branches 200 are arranged along the circumferential direction of the stator 1.

[0231] For example, each phase winding 22 of the three phase windings 22 can be obtained by circumferential rotation. That is, the winding structures of any two phase windings 22 are the same, and the multiple phase windings 22 are arranged along the circumferential direction of the stator 1.

[0232] Exemplarily, the number of poles of the stator winding 20 is 8, and the number of slot layers 110 of the stator slot 100 is 6. That is, P=4, N=6, Q=1. Alternatively, P=4, N=6, Q=3.

[0233] like Figure 1 As shown, the stator 1 includes a stator core 10 and a stator winding 20. The stator core 10 is provided with 48 stator slots 100. The 48 stator slots 100 are arranged at equal intervals along the circumference of the stator 1. The stator winding 20 has 3 phases, namely, U phase, V phase and W phase.

[0234] like Figure 2 As shown, six slot conductors 2124 are provided in any stator slot 100. Along the slot depth direction of the stator slot 100, the six slot conductors 2124 are respectively marked as L1, L2, L3, L4, L5 and L6.

[0235] The first coil group 212 a includes two U-shaped coils 2122 , one of which has a pitch of 5 and the other has a pitch of 7.

[0236] like Figure 4 As shown, the second coil group 212 b includes two U-shaped coils 2122 , and the pitch of the two U-shaped coils 2122 is 6.

[0237] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, the first winding branch 200 of the U phase includes three coil assemblies 210, and the three coil assemblies 210 are connected in series. The three coil assemblies 210 are distributed in the L1-L2 layer, the L3-L4 layer, and the L5-L6 layer. The three coil assemblies 210 are respectively recorded as coil assembly 210 (1,1,1), coil assembly 210 (1,1,2) and coil assembly 210 (1,1,3). Each coil assembly 210 includes four coil groups 212. The conductors in the first and last slots belonging to the two coil assemblies 210 are welded together. The conductors in the first and last slots of the coil assembly 210 (1,1,1) located in the L2 layer and the coil assembly 210 (1,1,2) located in the L3 layer are connected, and the conductors in the first and last slots of the coil assembly 210 (1,1,2) located in the L4 layer and the coil assembly 210 (1,1,3) located in the L5 layer are connected. The conductors in the first and last slots of the coil assembly 210 (1, 1, 1) located at the L1 layer and the coil assembly 210 (1, 1, 3) located at the LN layer are the incoming terminal and the outgoing terminal of the winding branch 200 respectively.

[0238] Exemplarily, the motor is a flat wire motor, which is 8p48s, the number of the conductors 2124 in the slot is 6, and the number of the slot layers 110 of the stator slot 100 is 6. Fig.10 The first parallel branch of the U-phase winding is shown in FIG. The solid connecting line represents the connection of the U-shaped coil 2122, and the dotted connecting line represents the welding connection of two U-shaped coils 2122. The coil is named as follows: "coil" + "slot number, conductor layer number" + "-" + "slot number, conductor layer number", for example: coil #8L1-#14L2.

[0239] like Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, the coil assembly 210 (1, 1, 1) is: coil #8L1-#14L2→(welding)→coil #20L1-#26L2→(welding)→coil #32L1-#38L2→(welding)→coil #44L1-#1L2→(welding)→coil #7L1-#13L2→(welding)→coil #19L1-#25L2→(welding)→coil #31L1-#37L2→(welding)→coil #43L1-#2L2. The first coil group 212a includes coils #44L1-#1L2 and coils #43L1-#2L2.

[0240] The coil assembly 210 (1, 1, 2) is: coil #8L3-#14L4→(welding)→coil #20L3-#26L4→(welding)→coil #32L3-#38L4→(welding)→coil #44L3-#1L4→(welding)→coil #7L3-#13L4→(welding)→coil #19L3-#25L4→(welding)→coil #31L3-#37L4→(welding)→coil #43L3-#2L4. The first coil assembly 212a includes coil #44L3-#1L4 and coil #43L3-#2L4.

[0241] The coil assembly 210 (1, 1, 3) is: coil #8L5-#14L6→(welding)→coil #20L5-#26L6→(welding)→coil #32L5-#38L6→(welding)→coil #44L5-#1L6→(welding)→coil #7L5-#13L6→(welding)→coil #19L5-#25L6→(welding)→coil #31L5-#37L6→(welding)→coil #43L5-#2L6. The first coil assembly 212a includes coil #44L5-#1L6 and coil #43L5-#2L6.

[0242] The coil assembly 210 (1,1,1) and the coil assembly 210 (1,1,2) are connected through coil #43L1-#2L2→(welding)→coil #8L3-#14L4. The coil assembly 210 (1,1,2) and the coil assembly 210 (1,1,3) are connected through #43L3-#2L4→(welding)→coil #8L5-#14L6.

[0243] #8L1 and #2L6 are respectively the incoming terminal and the outgoing terminal of the first parallel winding branch 200 of the U phase.

[0244] In this embodiment, the number of first coil groups 212a included in the three coil assemblies 210 of the first parallel winding branch 200 of the U phase is 1. In this embodiment, the second parallel winding branch 200 of the U phase can be obtained by rotating the first parallel winding branch 200. In this embodiment, the V phase winding and the W phase winding can be obtained by rotating the U phase winding.

[0245] Exemplarily, the motor is a flat wire motor, which is 8p48s, the number of the conductors 2124 in the slot is 6, and the number of the slot layers 110 of the stator slot 100 is 6. Fig.15 This is the connection diagram of the first parallel branch of the V-phase winding.

[0246] like Fig.15 , Fig.16 , Fig.17 , Fig.18 and Fig.19As shown, the coil assembly 210 (2, 1, 1) is: coil #6L1-#11L2→(welding)→coil #18L1-#23L2→(welding)→coil #30L1-#36L2→(welding)→coil #42L1-#47L2→(welding)→coil #5L1-#12L2→(welding)→coil #17L1-#24L2→(welding)→coil #29L1-#35L2→(welding)→coil #41L1-#48L2. The number of first coil groups 212a is three. The first first coil group 212a includes coil #6L1-#11L2 and coil #5L1-#12L2. The second first coil group 212a includes coil #18L1-#23L2 and coil #17L1-#24L2. The third first coil group 212a includes coils #42L1-#47L2 and coils #41L1-#48L2.

[0247] The coil assembly 210 (2, 1, 2) is: coil #6L3-#11L4→(welding)→coil #18L3-#23L4→(welding)→coil #30L3-#36L4→(welding)→coil #42L3-#47L4→(welding)→coil #5L3-#12L4→(welding)→coil #17L3-#24L4→(welding)→coil #29L3-#35L4→(welding)→coil #41L3-#48L4. The number of first coil groups 212a is three. The first first coil group 212a includes coil #6L3-#11L4 and coil #5L3-#12L4. The second first coil group 212a includes coil #18L3-#23L4 and coil #17L3-#24L4. The third first coil group 212a includes coils #42L3-#47L4 and coils #41L3-#48L4.

[0248] The coil assembly 210 (2, 1, 3) is: coil #6L5-#11L6→(welding)→coil #18L5-#23L6→(welding)→coil #30L5-#36L6→(welding)→coil #42L5-#47L6→(welding)→coil #5L5-#12L6→(welding)→coil #17L5-#24L6→(welding)→coil #29L5-#35L6→(welding)→coil #41L5-#48L6. The number of first coil groups 212a is three. The first first coil group 212a includes coil #6L5-#11L6 and coil #5L1-#12L6. The second first coil group 212a includes coil #18L5-#23L6 and coil #17L5-#24L6. The third first coil group 212a includes coils #42L5-#47L6 and coils #41L5-#48L6.

[0249] The coil assembly 210 (2, 1, 1) and the coil assembly 210 (2, 1, 2) are connected through coil #41L1-#48L2→(welding)→coil #6L3-#11L4. The coil assembly 210 (2, 1, 2) and the coil assembly 210 (2, 1, 3) are connected through #41L3-#48L4→(welding)→coil #6L5-#11L6.

[0250] #6L1 and #48L6 are respectively the incoming terminal and the outgoing terminal of the first parallel winding branch 200 of the V phase.

[0251] In this embodiment, the number of the first coil groups 212 a included in the three coil assemblies 210 of the first parallel winding branch 200 of the V phase is 3.

[0252] The second parallel winding branch 200 of the V phase in this embodiment can be obtained by rotating the first parallel winding branch 200. The U phase winding and the W phase winding in this embodiment can be obtained by rotating the V phase winding.

[0253] In this application, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0254] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: include: A stator core, wherein the stator core is provided with a plurality of stator slots; A stator winding, wound around the stator core, the stator winding comprising a plurality of phase windings, each of the phase windings comprising a plurality of winding branches, each of the winding branches comprising a plurality of coil assemblies connected in series, the plurality of coil assemblies being stacked in a radial direction of the stator, each of the coil assemblies comprising a plurality of coil groups, the plurality of coil groups being arranged in a circumferential direction of the stator, and the plurality of coil groups comprising a first coil group and a second coil group; The first coil group and the second coil group each include a plurality of stacked U-shaped coils; In the first coil group, a plurality of the U-shaped coils are concentrically arranged; In the second coil group, any two adjacent U-shaped coils among the plurality of U-shaped coils are eccentrically arranged, and any two adjacent U-shaped coils partially overlap; The stator slot has a plurality of slot layers along the slot depth direction of the stator slot, and the slot depth direction of the stator slot is the direction from the slot opening of the stator slot to the slot bottom of the stator slot, or the slot depth direction of the stator slot is the direction from the slot bottom of the stator slot to the slot opening of the stator slot; The U-shaped coil comprises two slot conductors which are arranged opposite to each other and spaced apart, and each slot conductor is arranged in one slot layer of one stator slot; In the U-shaped coil, the slot layer where one of the slot conductors is located is the nth layer, and the slot layer where another of the slot conductors is located is the n+1th layer, where n is an odd number; Wherein, the stator winding comprises a flat wire winding.

2. The stator according to claim 1, characterized in that: In two adjacent coil assemblies, the last in-slot conductor of one coil assembly is welded to the first in-slot conductor of the other coil assembly, and the two welded in-slot conductors are respectively recorded as the first in-slot conductor and the second in-slot conductor, the slot layer where the first in-slot conductor is located is the mth layer, and the slot layer where the second in-slot conductor is located is the m+1th layer; Among them, 2≤m≤N-2, m is an even number, N is the number of the slot layers of the stator slots, 1≤n≤N, and N is an even number greater than or equal to 4.

3. The stator according to claim 2, characterized in that: In the winding branch, the coil assembly closest to the bottom of the stator slot is recorded as the first coil assembly, and the coil assembly farthest from the bottom of the stator slot is recorded as the second coil assembly. The first conductor in the slot of the first coil assembly is an incoming terminal or an outgoing terminal, and the last conductor in the slot of the second coil assembly is an outgoing terminal or an incoming terminal.

4. The stator according to claim 2, characterized in that: In any two adjacent coil assemblies of the winding branch, each of the first coil groups in one of the coil assemblies is arranged opposite to one of the first coil groups in the other coil assembly.

5. The stator according to claim 2, characterized in that: In the winding branch, the number of the first coil groups of any two coil assemblies is the same.

6. The stator according to any one of claims 2 to 5, characterized in that: In the first coil group, any two of the plurality of U-shaped coils have different pitches; In the second coil group, any two of the plurality of U-shaped coils have the same pitch.

7. The stator according to claim 6, characterized in that In the winding branch, the number of the coil assemblies is N / 2; In the coil assembly, the number of the coil groups is P, the number of the first coil groups is Q, and the number of the second coil groups is PQ; Among them, Q is an odd number and the number of poles of the stator winding is 2×P.

8. The stator according to claim 7, characterized in that: P = 4, N = 6; Q = 1, or Q = 3; In the first coil group, the number of the U-shaped coils is 2, the pitch of one of the U-shaped coils is 5, and the pitch of the other U-shaped coil is 7; In the second coil group, the number of the U-shaped coils is 2, and the pitch of the U-shaped coils is 6; In the coil assembly, the welding pitch of the two U-shaped coils is 6.

9. The stator according to any one of claims 1 to 5, characterized in that: In the phase winding, any two winding branches have the same winding structure, and a plurality of winding branches are arranged along the circumferential direction of the stator.

10. The stator according to any one of claims 1 to 5, characterized in that: The winding structures of any two phase windings are the same, and a plurality of phase windings are arranged along the circumferential direction of the stator.

11. The stator according to any one of claims 1 to 5, characterized in that: A plurality of winding branches of the phase winding are connected in parallel; or The plurality of winding branches of the phase winding are connected in series.

12. The stator according to any one of claims 1 to 5, characterized in that: Each of the U-shaped coils further comprises a connecting conductor and two welding conductors, wherein the connecting conductor connects the first ends of the two in-slot conductors, and each of the welding conductors is connected to the second end of one of the in-slot conductors; Of the two welding conductors of the U-shaped coil, one welding conductor is arranged by bending along a first direction, and the other welding conductor is arranged by bending along a second direction.

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

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

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