Stator lamination, stator core, stator, electric machine, pump body and vehicle

Abstract

The application provides a stator lamination, a stator core, a stator, a motor, a pump body and a vehicle. The stator lamination comprises a yoke portion, a plurality of tooth portions, an inner circumferential wall between the yoke portion and two adjacent tooth portions, the inner circumferential wall comprising two planar sections and a connecting section, the connecting section being connected between the two planar sections, each planar section being connected with a circumferential end surface of a tooth portion, a maximum distance from the inner circumferential wall of the yoke portion to an outer circumferential wall of the yoke portion being bsy1, a minimum distance from the inner circumferential wall of the yoke portion to the outer circumferential wall of the yoke portion being bsy2, a maximum distance from the center of the stator lamination to the outer circumferential wall of the yoke portion being R1, and a minimum distance from the center of the stator lamination to an end surface of a tooth portion away from the yoke portion being R2, wherein 0≤bsy1-bsy2R1-R2. The application reasonably sets the structure of the stator lamination, can improve the torque ripple of the motor, can increase the output torque, and can improve the working efficiency of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to a stator lamination, a stator core, a stator, a motor, a pump body, and a vehicle. Background Technology

[0002] Mechanical equipment includes electric motors, which serve as the power source for mechanical equipment.

[0003] In related technologies, the motor's structural design is unreasonable, resulting in high torque ripple. Consequently, the motor experiences significant vibration and noise during operation, leading to poor product performance. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the first aspect of this application proposes a stator lamination.

[0006] The second aspect of this application proposes a stator core.

[0007] The third aspect of this application proposes a stator.

[0008] The fourth aspect of this application proposes an electric motor.

[0009] The fifth aspect of this application proposes a pump body.

[0010] The sixth aspect of this application proposes a vehicle.

[0011] In view of the above, the first aspect of this application provides a stator lamination, comprising: a yoke, the yoke being an annular structure; a plurality of teeth, each tooth being connected to the inner peripheral wall of the yoke, the plurality of teeth being arranged at intervals along the circumferential direction of the stator lamination; the inner peripheral wall of the yoke located between two adjacent teeth includes two planar segments and a connecting segment, the connecting segment connecting between the two planar segments along the circumferential direction of the stator lamination, each planar segment being connected to the circumferential end face of a tooth; in the portion of the yoke located between two adjacent teeth, the maximum distance from the inner peripheral wall of the yoke to the outer peripheral wall of the yoke is denoted as bsy1, and the minimum distance from the inner peripheral wall of the yoke to the outer peripheral wall of the yoke is denoted as bsy2; the maximum distance from the center of the stator lamination to the outer peripheral wall of the yoke is denoted as R1, and the minimum distance from the center of the stator lamination to the end face of the tooth away from the yoke is denoted as R2; wherein, 0≤bsy1-bsy2<R1-R2.

[0012] This application provides a stator lamination comprising a yoke and a plurality of teeth. Any one of the plurality of teeth is connected to the inner peripheral wall of the yoke, and the plurality of teeth are arranged at intervals along the circumferential direction of the stator lamination.

[0013] Specifically, in the portion of the yoke located between two adjacent teeth, the maximum distance between the inner and outer peripheral walls of the yoke is bsy1, and the minimum distance is bsy2. In other words, the maximum distance between the inner and outer peripheral walls of the yoke located between two adjacent teeth is bsy1, and the minimum distance is bsy2.

[0014] The relationship between bsy1, bsy2, R1, and R2 is defined to satisfy 0 ≤ bsy1 - bsy2 < R1 - R2. This setting limits the mating dimensions of the yoke and multiple teeth of the stator lamination. In other words, it limits the mating dimensions of the yoke and multiple teeth while ensuring a reasonable slot fill factor and current density of the motor. This setting can adjust the magnetic field distribution at the annular yoke and multiple teeth, avoiding oversaturation and undersaturation regions in the magnetic flux density design, thereby reducing torque ripple and electromagnetic vibration. In other words, by rationally setting the mating structure of the yoke and multiple teeth, the torque ripple of the motor is improved, thus reducing motor vibration and noise. Furthermore, this setting can increase output torque and improve motor efficiency.

[0015] Furthermore, along the circumferential direction of the stator lamination, the inner circumferential wall of the yoke located between two adjacent teeth includes a planar segment, a connecting segment, and a planar segment. That is, the inner circumferential wall of the yoke located between two adjacent teeth includes two planar segments and a connecting segment, and along the circumferential direction of the stator lamination, the connecting segment connects the two planar segments.

[0016] Each planar segment is connected to the circumferential end face of a tooth. This arrangement facilitates winding the motor windings, simplifies the winding process, and improves winding efficiency. Furthermore, this arrangement helps ensure winding density, guaranteeing appropriate slot fill factor and current density, resulting in more uniform magnetic flux distribution, reduced magnetic leakage, improved output torque quality, reduced torque ripple, and decreased vibration and noise.

[0017] The stator lamination described above according to this application may also have the following additional technical features:

[0018] In some embodiments, bsy1, bsy2, R1, and R2 may optionally satisfy: 0 ≤ (bsy1 - bsy2) / (R1 - R2) ≤ 0.1.

[0019] In this embodiment, the mating structure of bsy1, bsy2, R1 and R2 is further defined.

[0020] Specifically, bsy1, bsy2, R1, and R2 satisfy 0 ≤ (bsy1 - bsy2) / (R1 - R2) ≤ 0.1. That is, when the ratio of (bsy1 - bsy2) / (R1 - R2) is within the range of greater than or equal to 0 and less than or equal to 0.1, the motor has a larger output torque, higher operating efficiency, and the best cost performance.

[0021] In some embodiments, the minimum distance from the center of the stator lamination to the connecting section is greater than or equal to the maximum distance from the center of the stator lamination to the planar section.

[0022] In this embodiment, the structure of the yoke is further defined.

[0023] Specifically, the minimum distance from the center of the stator lamination to the connecting section is greater than or equal to the maximum distance from the center of the stator lamination to the planar section. That is, in the portion of the yoke located between two adjacent teeth, the maximum distance from the center of the stator lamination to the inner peripheral wall of the yoke is the same as the maximum distance from the center of the stator lamination to the connecting section. In other words, in the portion of the yoke located between two adjacent teeth, the maximum distance from the planar section to the outer peripheral wall of the yoke is bsy1, and the minimum distance from the connecting section to the outer peripheral wall of the yoke is denoted as bsy2. This defines the distance relationship between the planar section, the connecting section, and the outer peripheral wall of the yoke.

[0024] In some embodiments, the connecting segment may optionally include at least one sub-segment; when the connecting segment includes multiple sub-segments, the multiple sub-segments are sequentially connected along the circumferential direction of the stator lamination.

[0025] In this embodiment, the structure of the connecting segment is further defined.

[0026] Optionally, the connecting segment includes a sub-segment.

[0027] Optionally, the connecting section includes multiple sub-segments, which are connected sequentially along the circumference of the stator lamination; that is, the two sub-segments located at the ends are respectively connected to two planar segments.

[0028] In other words, the portion of the yoke located between two adjacent teeth has an inner peripheral wall, which is divided such that the inner peripheral wall of the yoke between two adjacent teeth comprises two planar segments and at least one sub-segment. Specifically, along the circumferential direction of the stator lamination, at least one sub-segment is located between the two planar segments.

[0029] In this way, while ensuring the effectiveness and reliability of the winding, the ring width of the yoke can be adjusted. Under the premise of balancing the cost and electromagnetic performance of the motor, the output torque and efficiency of the motor are maximized. Moreover, this structural design gives the stator laminations good rigidity, which is beneficial to improving the vibration and noise of the motor.

[0030] It is understandable that the ring width of the yoke can affect the magnetic flux density of the yoke, the size of the stator slots, the torque output of the motor, and the stiffness of the stator. This application has rationally designed the structure of the yoke, optimizing the magnetic flux density distribution of the yoke of the stator laminations while ensuring the output torque of the motor and the stiffness of the stator laminations. This is beneficial to improving the efficiency of the motor, that is, it balances the output torque and efficiency of the motor.

[0031] In some embodiments, the sub-segment may optionally include planar sub-segments and / or curved sub-segments.

[0032] In this embodiment, the shape of the sub-segment is further defined.

[0033] Specifically, a sub-segment may include a planar sub-segment, or a sub-segment may include an arcuate sub-segment, or a portion of a sub-segment may be a planar sub-segment and another portion of a sub-segment may be an arcuate sub-segment.

[0034] When a segment includes an arc segment, the transition between the planar segment and the segment is smoother, which is more conducive to winding. At the same time, it can significantly improve the motor mode and ensure the slot fill factor of the motor.

[0035] Optionally, when the number of sub-segments is one, the sub-segment is a planar sub-segment, or the sub-segment is an arc-shaped sub-segment, or part of the sub-segment is a planar sub-segment and the other part of the sub-segment is an arc-shaped sub-segment.

[0036] Optionally, when there are multiple sub-segments, the multiple sub-segments may have the same shape, or the multiple sub-segments may have different shapes, or some of the multiple sub-segments may have the same shape.

[0037] For example, when multiple sub-segments have the same shape, all sub-segments are planar sub-segments.

[0038] For example, when multiple sub-segments have the same shape, all sub-segments are curved surface sub-segments.

[0039] For example, when there are two sub-segments, one sub-segment is a planar sub-segment and the other sub-segment is an arc sub-segment.

[0040] For example, when the number of sub-segments is three, two of which are planar sub-segments and the other is an arc sub-segment.

[0041] Not all of them will be listed here.

[0042] In some embodiments, the included angle between the planar segment and the circumferential end face of the tooth is denoted as α, where 70°≤α≤100°.

[0043] In this embodiment, along the circumferential direction of the stator lamination, the tooth portion has a first end face and a second end face disposed opposite to each other. The first end face is connected to the planar segment, and the second end face is also connected to the planar segment. The included angle between the planar segment and the first end face is denoted as α, and similarly, the included angle between the planar segment and the second end face is denoted as α. Wherein, 70°≤α≤100°.

[0044] This design optimizes the fit between the yoke and the teeth, ensuring that the included angle α between the circumferential end faces of the planar section and the teeth is greater than or equal to 70° and less than or equal to 100°. This design guarantees the width of the yoke portion at the planar section along the radial direction of the stator lamination, optimizing the magnetic flux density distribution of the stator lamination yoke. While balancing motor cost and electromagnetic performance, this design maximizes the motor's output torque and efficiency. Furthermore, this structural design provides the stator lamination with good rigidity, which helps improve motor vibration and noise.

[0045] If the included angle α between the planar segment and the first end face (or the second end face) is less than 70°, then the portion of the yoke and the toothed portion that is opposite each other will have a larger radial width in the stator lamination, which will waste stator lamination material, affect the area of ​​the stator slot, and affect the current density of the motor.

[0046] If the included angle α between the planar segment and the first end face (or the second end face) is greater than 100°, then the width of the portion of the stator lamination that is opposite to the toothed portion in the radial direction will be smaller, which will reduce the structural rigidity of the stator lamination and increase the vibration noise of the motor.

[0047] In some embodiments, R1 and R2 may optionally satisfy: 0.46 ≤ R2 / R1 < 0.6.

[0048] In this embodiment, the structure of the stator lamination is further defined.

[0049] Specifically, bsy1, bsy2, R1, and R2 satisfy: 0 ≤ bsy1 - bsy2 < R1 - R2, and 0.46 ≤ R2 / R1 < 0.6.

[0050] It is understandable that the yoke and the two adjacent teeth enclose the stator slot.

[0051] In other words, the mating dimensions of the yoke and teeth of the stator laminations are limited. While keeping the inner diameter of the stator laminations constant, the ring width of the yoke can affect the magnetic flux density of the yoke, the size of the stator slots, the motor torque output, and the stator stiffness. This application rationally sets the relationship between the maximum value R1 of the distance from the center of the stator lamination to the outer peripheral wall of the yoke and the minimum value R2 of the distance R2 from the center of the stator lamination to the end face of the tooth shoe away from the yoke. While ensuring the motor output torque and the stiffness of the stator laminations, the magnetic flux density distribution of the stator lamination yoke is optimized, which is beneficial to improving the motor efficiency; that is, it balances the motor's output torque and efficiency.

[0052] If R2 / R1 is less than 0.46, then the motor's output capacity is insufficient and the motor's output torque is poor.

[0053] If R2 / R1 is greater than or equal to 0.6, the motor's moment of inertia is large, resulting in poor starting, acceleration, and braking performance, which reduces the motor's overall performance.

[0054] In some embodiments, each tooth may optionally include a tooth body and a tooth shoe, the tooth body being connected between the tooth shoe and the inner peripheral wall of the yoke; along the circumferential direction of the stator lamination, the minimum gap between the tooth shoes of two adjacent teeth is denoted as bso, and the number of teeth is denoted as Z, where 0.02≤(Z×bso) / (2×π×R2)≤0.35.

[0055] In this embodiment, the structure of the stator lamination is further defined.

[0056] Specifically, in the circumferential direction of the stator lamination, the toothed shoes of two adjacent teeth have a gap, the minimum value of which is bso. The number of teeth is Z.

[0057] The relationship between Z, bso, and R2 satisfies 0.02 ≤ (Z × bso) / (2 × π × R2) ≤ 0.35. This setting limits the circumferential clearance between adjacent toothed shoes on the stator laminations, balancing production cost and output torque.

[0058] If (Z×bso) / (2×π×R2)<0.02, it will be unfavorable for winding, increase the difficulty of winding, reduce the assembly efficiency of the motor, and increase the production cost of the motor.

[0059] If (Z×bso) / (2×π×R2)>0.35, the output torque will decrease, and the winding will easily protrude from the stator lamination through the gap between adjacent tooth shoes, resulting in a worse blocking effect on the winding.

[0060] The second aspect of this utility model provides a stator core, comprising: a plurality of stator laminations as described in the first aspect, the plurality of stator laminations being stacked, and the teeth of the plurality of stator laminations enclosing an mounting cavity.

[0061] The stator core provided by this utility model includes stator laminations as described in the first aspect, and therefore has all the beneficial effects of the aforementioned stator laminations, which will not be described in detail here.

[0062] The third aspect of this utility model provides a stator, comprising: a stator core as described in the second aspect.

[0063] The stator provided by this utility model includes a stator core as described in the second aspect, and therefore has all the beneficial effects of the aforementioned stator core, which will not be described in detail here.

[0064] The fourth aspect of this utility model provides an electric motor, comprising: a rotor; and a stator as in the third aspect, wherein the rotor is disposed in a mounting cavity and is rotatable relative to the stator.

[0065] The motor provided by this utility model includes a stator as described in the third aspect, and therefore has all the beneficial effects of the stator mentioned above, which will not be described in detail here.

[0066] Understandably, the rotor is housed in the stator's mounting cavity, allowing it to rotate relative to the stator. In other words, the motor is an inner rotor, outer stator type.

[0067] In some embodiments, the rotor may optionally include: a first rotor core having a shaft hole and a plurality of magnet slots, each magnet slot being located between the shaft hole and the outer peripheral wall of the first rotor core, the plurality of magnet slots being arranged at circumferential intervals along the shaft hole; and a plurality of first permanent magnets, each of the first permanent magnets being disposed in a magnet slot.

[0068] In this embodiment, the structure of the motor is further defined.

[0069] Specifically, the rotor includes a first rotor core and a plurality of first permanent magnets.

[0070] The first rotor core has a shaft hole and multiple magnet slots. The multiple magnet slots are arranged circumferentially along the shaft hole, and any one of the multiple magnet slots is located between the shaft hole and the outer peripheral wall of the first rotor core.

[0071] Each first permanent magnet is located in a magnet slot.

[0072] In other words, the rotor is a rotor with built-in permanent magnets.

[0073] In some embodiments, the rotor may optionally include: a second rotor core; and a plurality of second permanent magnets, each of which is disposed on the outer peripheral wall of the second rotor core, and the plurality of second permanent magnets are arranged at intervals along the circumference of the rotor.

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

[0075] Specifically, the rotor includes a second rotor core and multiple second permanent magnets.

[0076] Any one of the multiple second permanent magnets is disposed on the outer peripheral wall of the second rotor core, and the multiple second permanent magnets are arranged at intervals along the circumference of the rotor.

[0077] In other words, the rotor is a surface-mounted permanent magnet rotor.

[0078] The fifth aspect of this utility model provides a pump body, including: a motor as described in the fourth aspect.

[0079] The pump body provided by this utility model includes a motor as described in the fourth aspect, and therefore has all the beneficial effects of the aforementioned motor, which will not be described in detail here.

[0080] The sixth aspect of this utility model provides a vehicle comprising: an electric motor as in the fourth aspect; or a pump body as in the fifth aspect.

[0081] The vehicle provided by this utility model includes a motor as described in the fourth aspect or a pump body as described in the fifth aspect, and therefore has all the beneficial effects of the aforementioned motor or pump body, which will not be described in detail here.

[0082] 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.

[0083] The vehicle can also be a gasoline-powered car.

[0084] 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

[0085] 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:

[0086] Figure 1 A schematic diagram of the stator lamination structure according to the first embodiment of this application is shown;

[0087] Figure 2 A partial structural schematic diagram of the stator lamination according to the second embodiment of this application is shown;

[0088] Figure 3 A schematic diagram of the structure of the motor according to the first embodiment of this application is shown;

[0089] Figure 4 A schematic diagram of the structure of the motor according to the second embodiment of this application is shown;

[0090] Figure 5 The diagram shows a curve illustrating how the ratio of the output torque to the efficiency of the motor of this application varies with X.

[0091] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0092] 10 Stator laminations, 100 Yoke, 110 Inner peripheral wall of yoke, 112 Planar section, 114 Connecting section, 1142 Sub-segment, 120 Outer peripheral wall of yoke, 200 Tooth, 210 Tooth body, 220 Tooth shoe, 230 First end face, 240 Second end face, 30 Motor, 300 Stator core, 310 Mounting cavity, 400 Rotor, 410 First rotor core, 412 Shaft hole, 414 Magnet slot, 416 Outer peripheral wall of first rotor core, 420 First permanent magnet, 430 Second rotor core, 432 Outer peripheral wall of second rotor core, 440 Second permanent magnet. Detailed Implementation

[0093] 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.

[0094] 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.

[0095] The following reference Figures 1 to 5 According to some embodiments of this application, there are stator laminations 10, stator core 300, stator, motor 30, pump body and vehicle.

[0096] like Figure 1 As shown, a stator lamination 10 according to some embodiments of this application includes a yoke 100 and a plurality of teeth 200.

[0097] The yoke 100 has a ring structure.

[0098] Each tooth 200 is connected to the inner peripheral wall 110 of the yoke.

[0099] Multiple teeth 200 are arranged at circumferential intervals along the stator lamination 10.

[0100] The yoke 100 is located in the portion between two adjacent teeth 200. The maximum distance between the inner peripheral wall 110 and the outer peripheral wall 120 of the yoke is denoted as bsy1, and the minimum distance between the inner peripheral wall 110 and the outer peripheral wall 120 of the yoke is denoted as bsy2.

[0101] The maximum distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke is denoted as R1.

[0102] The minimum distance from the center of the stator lamination 10 to the end face of the tooth 200 away from the yoke 100 is denoted as R2.

[0103] Where 0 ≤ bsy1 - bsy2 < R1 - R2.

[0104] The stator lamination 10 provided in this application includes a yoke 100 and a plurality of teeth 200. Any one of the plurality of teeth 200 is connected to the inner peripheral wall 110 of the yoke, and the plurality of teeth 200 are arranged at intervals along the circumference of the stator lamination 10.

[0105] In the portion of the yoke 100 located between two adjacent teeth 200, the maximum distance between the inner peripheral wall 110 and the outer peripheral wall 120 of the yoke is bsy1, and the minimum distance is bsy2. That is, the maximum distance between the inner peripheral wall of the yoke 100 between two adjacent teeth 200 and the outer peripheral wall of the yoke 100 between two adjacent teeth 200 is bsy1, and the minimum distance is bsy2.

[0106] The relationship between bsy1, bsy2, R1, and R2 is defined to satisfy 0 ≤ bsy1 - bsy2 < R1 - R2. This setting limits the mating dimensions of the yoke 100 and multiple teeth 200 of the stator lamination 10. That is, the mating dimensions of the yoke 100 and multiple teeth 200 are limited while ensuring a reasonable slot fill factor and current density of the motor 30. This setting can adjust the magnetic field distribution at the annular yoke and multiple teeth 200 accordingly, avoiding oversaturation and undersaturation regions in the magnetic flux density design, thereby reducing torque pulsation and electromagnetic vibration. In other words, by reasonably setting the mating structure of the yoke 100 and multiple teeth 200, the torque pulsation of the motor 30 is improved, thereby reducing the vibration and noise of the motor 30. Furthermore, this setting can also increase the output torque and improve the working efficiency of the motor 30.

[0107] It is understandable that when bsy1-bsy2=0, the portion of the yoke 100 located between two adjacent teeth 200 has an equal width structure.

[0108] It is understandable that when bsy1-bsy2>0, the portion of the yoke 100 located between two adjacent teeth 200 has an unequal width.

[0109] In some embodiments, bsy1, bsy2, R1, and R2 may optionally satisfy: 0 ≤ (bsy1 - bsy2) / (R1 - R2) ≤ 0.1.

[0110] In this embodiment, the mating structure of bsy1, bsy2, R1 and R2 is further defined.

[0111] Specifically, bsy1, bsy2, R1, and R2 satisfy 0 ≤ (bsy1 - bsy2) / (R1 - R2) ≤ 0.1. That is, when the ratio of (bsy1 - bsy2) / (R1 - R2) is within the range of greater than or equal to 0 and less than or equal to 0.1, the output torque of motor 30 is larger, the working efficiency of motor 30 is higher, and motor 30 has the highest cost performance.

[0112] Alternatively, (bsy1-bsy2) / (R1-R2) = 0.02, (bsy1-bsy2) / (R1-R2) = 0.04, (bsy1-bsy2) / (R1-R2) = 0.05, (bsy1-bsy2) / (R1-R2) = 0.06 and (bsy1-bsy2) / (R1-R2) = 0.08, etc., which will not be listed here.

[0113] In some embodiments, optionally, such as Figure 1 As shown, the inner peripheral wall of the yoke 100 located between two adjacent teeth 200 includes two planar segments 112 and a connecting segment 114.

[0114] Along the circumference of the stator lamination 10, the connecting section 114 connects the two planar sections 112.

[0115] Each planar segment 112 is connected to the circumferential end face of a tooth 200.

[0116] In this embodiment, the mating structure of the yoke 100 and the tooth 200 is further defined.

[0117] Specifically, along the circumferential direction of the stator lamination 10, the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes a planar segment 112, a connecting segment 114, and another planar segment 112. That is, the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes two planar segments 112 and a connecting segment 114, and along the circumferential direction of the stator lamination 10, the connecting segment 114 connects the two planar segments 112.

[0118] Each planar segment 112 is connected to the circumferential end face of a tooth 200. This arrangement facilitates the winding of the motor 30, simplifies the winding process, and improves winding efficiency. Furthermore, this arrangement helps ensure the winding density, guaranteeing a reasonable slot fill factor and current density for the motor 30, resulting in a more uniform magnetic flux distribution, reduced magnetic leakage, improved output torque quality, reduced torque ripple, and reduced vibration and noise.

[0119] In some embodiments, the minimum distance from the planar segment 112 to the outer peripheral wall 120 of the yoke is greater than or equal to the maximum distance from the connecting segment 114 to the outer peripheral wall 120 of the yoke.

[0120] In this embodiment, the structure of the yoke 100 is further defined.

[0121] Specifically, the minimum distance from the planar segment 112 to the outer peripheral wall 120 of the yoke is greater than or equal to the maximum distance from the connecting segment 114 to the outer peripheral wall 120 of the yoke. That is, in the portion of the yoke 100 located between two adjacent toothed portions 200, the maximum distance from the planar segment 112 to the outer peripheral wall 120 of the yoke is denoted as bsy1, and the minimum distance from the connecting segment 114 to the outer peripheral wall 120 of the yoke is denoted as bsy2. In other words, the distance relationship between the planar segment 112, the connecting segment 114, and the outer peripheral wall 120 of the yoke is defined.

[0122] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the connecting segment 114 includes at least one sub-segment 1142; when the connecting segment 114 includes multiple sub-segments 1142, the multiple sub-segments 1142 are connected sequentially along the circumferential direction of the stator lamination 10.

[0123] In this embodiment, the structure of the connecting segment 114 is further defined.

[0124] Optionally, the connecting segment 114 includes a sub-segment 1142.

[0125] Optionally, the connecting section 114 includes multiple sub-segments 1142, which are connected sequentially along the circumference of the stator lamination 10. That is, the two sub-segments 1142 located at the ends are respectively connected to the two planar segments 112.

[0126] That is, the portion of the yoke 100 located between two adjacent teeth 200 has an inner peripheral wall, which is divided such that the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes two planar segments 112 and at least one sub-segment 1142. Specifically, along the circumferential direction of the stator lamination 10, at least one sub-segment 1142 is located between the two planar segments 112.

[0127] In this way, while ensuring the effectiveness and reliability of the winding, the ring width of the yoke 100 can be adjusted. Under the premise of balancing the cost and electromagnetic performance of the motor 30, the output torque and efficiency of the motor 30 are maximized. Moreover, this structural design gives the stator lamination 10 good rigidity, which is beneficial to improving the vibration and noise of the motor 30.

[0128] It is understandable that the ring width of the yoke 100 can affect the magnetic flux density of the yoke 100, the size of the stator slots, the torque output of the motor 30, and the stiffness of the stator. This application rationally sets the structure of the yoke 100, optimizing the magnetic flux density distribution of the yoke 100 of the stator lamination 10 while ensuring the output torque of the motor 30 and the stiffness of the stator lamination 10. This is beneficial to improving the efficiency of the motor 30, that is, it balances the output torque and efficiency of the motor 30.

[0129] In some embodiments, sub-segment 1142 may optionally include planar sub-segments and / or arcuate sub-segments.

[0130] In this embodiment, the shape of segment 1142 is further defined.

[0131] Specifically, sub-segment 1142 includes planar sub-segments, or sub-segment 1142 includes arcuate sub-segments, or a portion of sub-segment 1142 is a planar sub-segment and another portion of sub-segment 1142 is an arcuate sub-segment.

[0132] When sub-segment 1142 includes arc sub-segment, the transition between planar segment 112 and sub-segment 1142 is smoother, which is more conducive to winding. At the same time, it can significantly improve the mode of motor 30 and ensure the slot fill factor of motor 30.

[0133] Optionally, when the number of sub-segments 1142 is one, the sub-segment 1142 is a planar sub-segment, or the sub-segment 1142 is an arc-shaped sub-segment, or a part of the sub-segment 1142 is a planar sub-segment and the other part of the sub-segment 1142 is an arc-shaped sub-segment 1142.

[0134] Optionally, when there are multiple sub-segments 1142, the multiple sub-segments 1142 may have the same shape, or the multiple sub-segments 1142 may have different shapes, or some of the multiple sub-segments 1142 may have the same shape.

[0135] For example, when multiple sub-segments 1142 have the same shape, all multiple sub-segments 1142 are planar sub-segments.

[0136] For example, when multiple segments 1142 have the same shape, all segments 1142 are arc-shaped segments.

[0137] For example, when there are two sub-segments 1142, one sub-segment 1142 is a planar sub-segment and the other sub-segment 1142 is an arc sub-segment.

[0138] For example, when there are three sub-segments 1142, two of which are planar sub-segments and the other is an arc sub-segment.

[0139] Not all of them will be listed here.

[0140] In some embodiments, optionally, such as Figure 1 As shown, the included angle between the planar segment 112 and the circumferential end face of the tooth 200 is denoted as α, where 70°≤α≤100°.

[0141] In this embodiment, along the circumferential direction of the stator lamination 10, the tooth portion 200 has a first end face 230 and a second end face 240 disposed opposite to each other. The first end face 230 is connected to the planar segment 112, and the second end face 240 is connected to the planar segment 112. The included angle between the planar segment 112 and the first end face 230 is denoted as α, and similarly, the included angle between the planar segment 112 and the second end face 240 is denoted as α. Wherein, 70°≤α≤100°.

[0142] This design optimizes the fit between the yoke 100 and the toothed portion 200. The included angle α between the planar segment 112 and the circumferential end face of the toothed portion 200 is greater than or equal to 70° and less than or equal to 100°. This design ensures that the width of the portion of the yoke 100 at the planar segment 112 is maintained radially along the stator lamination 10, optimizing the magnetic flux density distribution of the yoke 100. While considering the cost and electromagnetic performance of the motor 30, this design maximizes the output torque and efficiency of the motor 30. Furthermore, this structural design gives the stator lamination 10 good rigidity, which helps to reduce vibration and noise in the motor 30.

[0143] If the included angle α between the planar segment 112 and the first end face 230 (or the second end face 240) is less than 70°, then the portion of the yoke 100 that is opposite to the tooth 200 will have a larger radial width in the stator lamination 10, which will waste the material of the stator lamination 10, affect the area of ​​the stator slot, and affect the current density of the motor 30.

[0144] If the included angle α between the planar segment 112 and the first end face 230 (or the second end face 240) is greater than 100°, then the portion of the yoke 100 that is opposite to the tooth 200 will have a smaller radial width in the stator lamination 10, which will reduce the structural rigidity of the stator lamination 10 and increase the vibration noise of the motor 30.

[0145] Optionally, the included angle α between the planar segment 112 and the circumferential end face of the tooth 200 includes 80°, 85°, 90° and 95°, etc., which will not be listed here.

[0146] In some embodiments, optionally, such as Figure 1 As shown, each tooth 200 includes a tooth body 210 and a tooth shoe 220.

[0147] The tooth body 210 is connected between the toothed shoe 220 and the inner peripheral wall 110 of the yoke.

[0148] Along the circumferential direction of the stator lamination 10, the minimum gap between the tooth shoes 220 of two adjacent teeth 200 is denoted as bso.

[0149] The number of teeth 200 is denoted as Z, where 0.02≤(Z×bso) / (2×π×R2)≤0.35.

[0150] In this embodiment, the structure of the stator lamination 10 is further defined.

[0151] Specifically, in the circumferential direction of the stator lamination 10, the tooth shoes 220 of two adjacent teeth 200 have a gap, the minimum value of which is bso. The number of teeth 200 is Z.

[0152] The relationship between Z, bso, and R2 satisfies 0.02 ≤ (Z × bso) / (2 × π × R2) ≤ 0.35. This setting limits the circumferential clearance of adjacent toothed shoes 220 in the stator lamination 10, balancing production cost and output torque.

[0153] If (Z×bso) / (2×π×R2)<0.02, it will be unfavorable for winding, increase the difficulty of winding, reduce the assembly efficiency of motor 30, and increase the production cost of motor 30.

[0154] If (Z×bso) / (2×π×R2)>0.35, the output torque will decrease, and the winding will easily extend out of the stator lamination 10 through the gap between adjacent toothed shoes 220, resulting in a worse blocking effect on the winding.

[0155] In some embodiments, R1 and R2 may optionally satisfy: 0.46 ≤ R2 / R1 < 0.6.

[0156] In this embodiment, the structure of the stator lamination 10 is further defined.

[0157] Specifically, bsy1, bsy2, R1, and R2 satisfy: 0 ≤ bsy1 - bsy2 < R1 - R2, and 0.46 ≤ R2 / R1 < 0.6.

[0158] It is understandable that the yoke 100 and the two adjacent teeth 200 enclose the stator slot.

[0159] That is, the mating dimensions of the yoke 100 and tooth 200 of the stator lamination 10 are limited. While keeping the inner diameter of the stator lamination 10 constant, the ring width of the yoke 100 can affect the magnetic flux density of the yoke 100, the size of the stator slot, the torque output of the motor 30, and the stiffness of the stator. This application rationally sets the relationship between the maximum value R1 of the distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke and the minimum value R2 of the distance from the center of the stator lamination 10 to the end face of the tooth shoe 220 away from the yoke 100. While ensuring the output torque of the motor 30 and the stiffness of the stator lamination 10, the magnetic flux density distribution of the yoke 100 of the stator lamination 10 is optimized, which is beneficial to improving the efficiency of the motor 30; that is, it balances the output torque and efficiency of the motor 30.

[0160] If R2 / R1 is less than 0.46, then the output capacity of motor 30 is insufficient and the output torque of motor 30 is poor.

[0161] If R2 / R1 is greater than or equal to 0.6, then the moment of inertia of motor 30 is large, the starting, acceleration and braking effects of motor 30 are poor, and the performance of motor 30 is reduced.

[0162] Alternatively, R2 / R1 = 0.48, R2 / R1 = 0.5, R2 / R1 = 0.52, R2 / R1 = 0.54, R2 / R1 = 0.56 and R2 / R1 = 0.58.

[0163] A stator core 300 according to some embodiments of this application includes: a plurality of stator laminations 10 as described in any of the above embodiments.

[0164] Multiple stator laminations are stacked in 10 layers.

[0165] The teeth 200 of multiple stator laminations 10 enclose the mounting cavity 310.

[0166] The stator core 300 provided by this utility model includes multiple stator laminations 10.

[0167] The stator lamination 10 includes a yoke 100 and a plurality of teeth 200. Any one of the plurality of teeth 200 is connected to the inner peripheral wall 110 of the yoke, and the plurality of teeth 200 are arranged at intervals along the circumference of the stator lamination 10.

[0168] In the portion of the yoke 100 located between two adjacent teeth 200, the maximum distance between the inner peripheral wall 110 and the outer peripheral wall 120 of the yoke is bsy1, and the minimum distance is bsy2. That is, the maximum distance between the inner peripheral wall of the yoke 100 between two adjacent teeth 200 and the outer peripheral wall of the yoke 100 between two adjacent teeth 200 is bsy1, and the minimum distance is bsy2.

[0169] The relationship between bsy1, bsy2, R1, and R2 is defined to satisfy 0 ≤ bsy1 - bsy2 < R1 - R2. This setting limits the mating dimensions of the yoke 100 and multiple teeth 200 of the stator lamination 10. That is, the mating dimensions of the yoke 100 and multiple teeth 200 are limited while ensuring a reasonable slot fill factor and current density of the motor 30. This setting can adjust the magnetic field distribution at the annular yoke and multiple teeth 200 accordingly, avoiding oversaturation and undersaturation regions in the magnetic flux density design, thereby reducing torque pulsation and electromagnetic vibration. In other words, by reasonably setting the mating structure of the yoke 100 and multiple teeth 200, the torque pulsation of the motor 30 is improved, thereby reducing the vibration and noise of the motor 30. Furthermore, this setting can also increase the output torque and improve the working efficiency of the motor 30.

[0170] Furthermore, along the circumferential direction of the stator lamination 10, the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes a planar segment 112, a connecting segment 114, and another planar segment 112. That is, the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes two planar segments 112 and a connecting segment 114, and along the circumferential direction of the stator lamination 10, the connecting segment 114 connects the two planar segments 112.

[0171] Each planar segment 112 is connected to the circumferential end face of a tooth 200. This arrangement facilitates the winding of the motor 30, simplifies the winding process, and improves winding efficiency. Furthermore, this arrangement helps ensure the winding density, guaranteeing a reasonable slot fill factor and current density for the motor 30, resulting in a more uniform magnetic flux distribution, reduced magnetic leakage, improved output torque quality, reduced torque ripple, and reduced vibration and noise.

[0172] like Figure 3 and Figure 4 As shown, a stator according to some embodiments of this application includes a stator core 300 as described in the above embodiments. Because it includes the stator core 300 as described in the above embodiments, it possesses all the beneficial effects of the stator core 300 described above, which will not be described in detail here.

[0173] An electric motor 30 according to some embodiments of this application includes: a rotor 400 and a stator as described in the above embodiments.

[0174] The rotor 400 is located in the mounting cavity 310.

[0175] The rotor 400 is able to rotate relative to the stator.

[0176] The motor 30 provided by this utility model includes the stator as described in the above embodiments, and therefore has all the beneficial effects of the stator, which will not be described in detail here.

[0177] It is understandable that the rotor 400 is located in the mounting cavity 310 of the stator, and the rotor 400 can rotate relative to the stator. That is, the motor 30 is a motor 30 with an inner rotor 400 and an outer stator.

[0178] In some embodiments, optionally, such as Figure 3 As shown, the rotor 400 includes a first rotor core 410 and a plurality of first permanent magnets 420.

[0179] The first rotor core 410 is provided with a shaft hole 412 and multiple magnet slots 414.

[0180] Each magnet slot 414 is located between the shaft hole 412 and the outer peripheral wall 416 of the first rotor core.

[0181] Multiple magnet slots 414 are arranged at circumferential intervals along the shaft hole 412.

[0182] Each first permanent magnet 420 is disposed in a magnet slot 414.

[0183] In this embodiment, the structure of the motor 30 is further defined.

[0184] Specifically, the rotor 400 includes a first rotor core 410 and a plurality of first permanent magnets 420.

[0185] The first rotor core 410 is provided with a shaft hole 412 and a plurality of magnet slots 414. The plurality of magnet slots 414 are arranged at intervals along the circumference of the shaft hole 412, and any one of the plurality of magnet slots 414 is located between the shaft hole 412 and the outer peripheral wall 416 of the first rotor core.

[0186] Each first permanent magnet 420 is disposed in a magnet slot 414.

[0187] In other words, rotor 400 is a rotor 400 with built-in permanent magnets.

[0188] In some embodiments, optionally, such as Figure 4 As shown, the rotor 400 includes a second rotor core 430 and a plurality of second permanent magnets 440.

[0189] Each second permanent magnet 440 is disposed on the outer peripheral wall 432 of the second rotor core, and the plurality of second permanent magnets 440 are arranged at intervals along the circumference of the rotor 400.

[0190] In this embodiment, the structure of the motor 30 is further defined.

[0191] Specifically, the rotor 400 includes a second rotor core 430 and a plurality of second permanent magnets 440.

[0192] Any one of the plurality of second permanent magnets 440 is disposed on the outer peripheral wall 432 of the second rotor core, and the plurality of second permanent magnets 440 are arranged at intervals along the circumference of the rotor 400.

[0193] In other words, rotor 400 is a rotor 400 with surface-mounted permanent magnets.

[0194] A pump body according to some embodiments of this application includes: a motor 30 as in any of the above embodiments.

[0195] The pump body provided by this utility model includes the motor 30 as in any of the above embodiments, and therefore has all the beneficial effects of the motor 30, which will not be described in detail here.

[0196] A vehicle according to some embodiments of this application includes: a motor 30 as described in the above embodiments; or a pump body as described in the above embodiments.

[0197] The vehicle provided by this utility model includes the motor 30 as described in the above embodiments or the pump body as described in the above embodiments. Therefore, it has all the beneficial effects of the motor 30 or the pump body, which will not be described one by one here.

[0198] 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.

[0199] The vehicle can also be a gasoline-powered car.

[0200] Optionally, the stator lamination 10 has a sheet-like structure and includes: a yoke 100, which is annular; a plurality of teeth 200, each tooth 200 connected to the inner peripheral wall 110 of the yoke, the plurality of teeth 200 being arranged at intervals along the circumference of the stator lamination 10, each tooth 200 including a tooth body 210 and a tooth shoe 220, the tooth body 210 being connected between the tooth shoe 220 and the inner peripheral wall 110 of the yoke; any two adjacent teeth 200 and the yoke 100 enclose a stator slot, which is used to place the winding. The bottom of the stator slot (i.e., the inner peripheral wall 110 of the yoke) includes two planar segments 112 (ab is one planar segment 112, cd is the other planar segment 112) and a connecting segment 114 (bc is the connecting segment 114). The maximum distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke is denoted as R1, and the minimum distance from the center of the stator lamination 10 to the end face of the toothed shoe 220 away from the yoke 100 is denoted as R2. bsy1 is the maximum distance from the bottom of the stator slot to the outer peripheral wall 120 of the yoke, and bsy2 is the minimum distance from the bottom of the stator slot to the outer peripheral wall 120 of the yoke, where 0≤(bsy1-bsy2) / (R1-R2)≤0.1.

[0201] Optionally, R1 and R2 satisfy: 0.46 ≤ R2 / R1 < 0.6.

[0202] Optionally, the included angle between the planar segment 112 and the circumferential end face of the tooth 200 is denoted as α, where 70°≤α≤100°.

[0203] Optionally, along the circumferential direction of the stator lamination 10, the minimum gap between the tooth shoes 220 of two adjacent teeth 200 is denoted as bso, and the number of teeth 200 is denoted as Z, where 0.02≤(Z×bso) / (2×π×R2)≤0.35.

[0204] Optionally, the connecting segment 114 includes at least one sub-segment 1142, which can be a planar sub-segment or an arc sub-segment.

[0205] Optionally, the stator core 300 includes a plurality of stator laminations 10 arranged in a thickness direction.

[0206] Optionally, the motor 30 includes a rotor 400 and a stator, with the rotor 400 rotatably disposed in the mounting cavity 310 of the stator.

[0207] Specifically, such as Figure 5 As shown, a built-in permanent magnet motor with 6 slots and 4 poles is used as an example.

[0208] Let X = (bsy1 - bsy2) / (R1 - R2), where T* and η* are per-unit values. T* represents the ratio of the output torque of motor 30 under different X values ​​to the output torque of motor 30 when X = 0. η* represents the ratio of the efficiency of motor 30 under different X values ​​to the efficiency of motor 30 when X = 0. Figure 5 It can be seen that when 0≤X≤0.1, the output torque of motor 30 is relatively large, the efficiency of motor 30 is relatively high, and the cost performance of motor 30 is the highest.

[0209] 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.

[0210] 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 lamination, characterized in that, include: The yoke portion has a ring-shaped structure. Multiple teeth, each of which is connected to the inner peripheral wall of the yoke, and the multiple teeth are arranged at circumferential intervals along the stator lamination; The inner peripheral wall of the yoke located between two adjacent teeth includes two planar segments and a connecting segment. Along the circumferential direction of the stator lamination, the connecting segment connects the two planar segments, and each planar segment is connected to the circumferential end face of one of the teeth. The yoke is located in the portion between two adjacent teeth. The maximum distance from the inner peripheral wall of the yoke to the outer peripheral wall of the yoke is denoted as bsy1, and the minimum distance from the inner peripheral wall of the yoke to the outer peripheral wall of the yoke is denoted as bsy2. The maximum distance from the center of the stator lamination to the outer peripheral wall of the yoke is denoted as R1, and the minimum distance from the center of the stator lamination to the end face of the tooth that is away from the yoke is denoted as R2. Where 0 ≤ bsy1 - bsy2 < R1 - R2.

2. The stator lamination according to claim 1, characterized in that, bsy1, bsy2, R1, and R2 satisfy: 0 ≤ (bsy1 - bsy2) / (R1 - R2) ≤ 0.

1.

3. The stator lamination according to claim 1 or 2, characterized in that, The minimum distance from the center of the stator lamination to the connecting section is greater than or equal to the maximum distance from the center of the stator lamination to the planar section.

4. The stator lamination according to claim 1 or 2, characterized in that, The connecting segment includes at least one sub-segment; When the connecting segment includes multiple sub-segments, the multiple sub-segments are connected sequentially along the circumferential direction of the stator lamination.

5. The stator lamination according to claim 4, characterized in that, The sub-segment includes planar sub-segments and / or curved sub-segments.

6. The stator lamination according to claim 1 or 2, characterized in that, The included angle between the planar segment and the circumferential end face of the tooth is denoted as α, where 70°≤α≤100°.

7. The stator lamination according to claim 1 or 2, characterized in that, R1 and R2 satisfy: 0.46≤R2 / R1<0.

6.

8. The stator lamination according to claim 1 or 2, characterized in that, Each of the teeth includes a tooth body and a tooth boot, the tooth body being connected between the tooth boot and the inner peripheral wall of the yoke; Along the circumferential direction of the stator lamination, the minimum gap between two adjacent toothed shoes is denoted as bso, and the number of teeth is denoted as Z, where 0.02≤(Z×bso) / (2×π×R2)≤0.

35.

9. A stator core, characterized in that, include: A plurality of stator laminations as described in any one of claims 1 to 8, wherein the plurality of stator laminations are stacked and the teeth of the plurality of stator laminations enclose a mounting cavity.

10. A stator, characterized in that, include: The stator core as described in claim 9.

11. An electric motor, characterized in that, include: Rotor; And the stator as described in claim 10, wherein the rotor is disposed in the mounting cavity and the rotor is rotatable relative to the stator.

12. The motor according to claim 11, characterized in that, The rotor includes: The first rotor core has a shaft hole and a plurality of magnet slots. Each magnet slot is located between the shaft hole and the outer peripheral wall of the first rotor core, and the plurality of magnet slots are arranged at circumferential intervals along the shaft hole. A plurality of first permanent magnets, each of the first permanent magnets being disposed in one of the magnet slots.

13. The motor according to claim 11, characterized in that, The rotor includes: Second rotor core; A plurality of second permanent magnets are provided, each of the second permanent magnets being disposed on the outer peripheral wall of the second rotor core, and the plurality of second permanent magnets are arranged at intervals along the circumference of the rotor.

14. A pump body, characterized in that, include: The motor as described in any one of claims 11 to 13.

15. A vehicle, characterized in that, include: The motor as described in any one of claims 11 to 13; or The pump body as described in claim 14.

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