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 part, the yoke part being a ring structure; a plurality of tooth parts, each tooth part comprising a tooth body and a tooth shoe, the tooth body being connected between the tooth shoe and an inner circumferential wall of the yoke part, and the plurality of tooth parts being arranged at intervals along the circumferential direction of the stator lamination; the width of the tooth body gradually increases or gradually decreases along the circumferential direction of the stator lamination from the yoke part to the tooth shoe; along the circumferential direction of the stator lamination, the width of the connection between the tooth body and the tooth shoe is denoted as bst1, and the width of the connection between the tooth body and the yoke part is denoted as bst2; the maximum distance from the center of the stator lamination to the outer circumferential wall of the yoke part is denoted as R1, and the minimum distance from the center of the stator lamination to the end surface of the tooth shoe away from the yoke part is denoted as R2; and wherein |bst1‑bst2|≤R1‑R2. This arrangement can reduce torque ripple and reduce electromagnetic vibration.

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] Electric motors generate driving torque and serve as the power source for electrical appliances and various mechanical devices. With rapid societal development, electric motors have garnered increasing attention, leading to higher requirements for torque ripple control. In related technologies, high torque ripple in electric motors results in significant vibration and noise, negatively impacting their performance. Utility Model Content

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

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

[0005] The second aspect of this application proposes a stator core.

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

[0007] The fourth aspect of this application proposes an electric motor.

[0008] The fifth aspect of this application proposes a pump body.

[0009] The sixth aspect of this application proposes a vehicle.

[0010] In view of the above, the first aspect of this application provides a stator lamination, comprising: a yoke, the yoke having an annular structure; a plurality of teeth, each tooth comprising a tooth body and a tooth shoe, the tooth body being connected between the tooth shoe and the inner peripheral wall of the yoke, the plurality of teeth being arranged at intervals along the circumferential direction of the stator lamination; the width of the tooth body gradually increasing or decreasing along the circumferential direction of the stator lamination from the yoke to the tooth shoe; the width at the connection between the tooth body and the tooth shoe along the circumferential direction of the stator lamination is denoted as bst1, and the width at the connection between the tooth body and the yoke is denoted as bst2; 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 shoe away from the yoke is denoted as R2; wherein, |bst1-bst2|≤R1-R2.

[0011] The stator lamination provided in this application includes a yoke and a plurality of teeth, any one of which is connected to the inner peripheral wall of the yoke, and the plurality of teeth are arranged at intervals along the circumference of the stator lamination.

[0012] Specifically, the toothed part includes a tooth body and a toothed shoe, with the tooth body connected between the inner peripheral wall of the yoke and the toothed shoe.

[0013] Along the yoke to the toothed shoe, the width of the tooth body in the circumferential direction of the stator lamination gradually increases. Alternatively, along the yoke to the toothed shoe, the width of the tooth body in the circumferential direction of the stator lamination gradually decreases. That is, when the tooth body is sectioned along an axis perpendicular to the stator lamination, the shape formed by the contour lines of the tooth body in the section is trapezoidal.

[0014] Among them, along the circumference of the stator lamination, the width at the connection between the tooth body and the tooth shoe is bst1, and the width at the connection between the tooth body and the yoke is bst2. The maximum distance from the center of the stator lamination to the outer peripheral wall of the yoke is R1, and the minimum distance from the center of the stator lamination to the end face of the tooth shoe away from the yoke is R2.

[0015] The relationship between bst1, bst2, R1, and R2 is defined to satisfy |bst1-bst2| ≤ 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 for the motor. During motor operation, the magnetic field distribution at the annular yoke and multiple teeth can be adjusted accordingly, avoiding oversaturation and undersaturation regions in the magnetic flux density design, thereby reducing torque pulsation and electromagnetic vibration. In other words, by rationally setting the mating structure of the yoke and multiple teeth, the torque pulsation of the motor is improved, thus reducing motor vibration and noise, enhancing product performance and market competitiveness.

[0016] The stator lamination described above according to this application may also have the following additional technical features:

[0017] In some embodiments, bst1, bst2, R1, and R2 may optionally satisfy: 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5.

[0018] In this embodiment, the mating structure of bst1, bst2, R1 and R2 is further defined.

[0019] Specifically, bst1, bst2, R1, and R2 satisfy the condition: 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5. That is, when the ratio of (∣bst1-bst2∣) to (R1-R2) is greater than 0 and less than 0.5, the motor exhibits better torque ripple and higher cost-effectiveness.

[0020] In some embodiments, R1 and R2 may optionally satisfy: 0.46 ≤ R2 / R1 < 0.6.

[0021] In this embodiment, the structure of the stator lamination is further defined.

[0022] Specifically, bst1, bst2, R1, and R2 satisfy: |bst1-bst2| ≤ R1-R2, and 0.46 ≤ R2 / R1 < 0.6.

[0023] It is understandable that the yoke and the two adjacent teeth enclose the stator slot.

[0024] 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.

[0025] If R2 / R1 is less than 0.46, then the motor's output capacity is insufficient and the motor's output torque is poor.

[0026] 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.

[0027] In some embodiments, the inner peripheral wall of the yoke may optionally include a first planar segment, which is connected to the circumferential end face of the tooth body.

[0028] In this embodiment, the mating structure of the yoke and the teeth is further defined.

[0029] Specifically, the inner peripheral wall of the yoke includes a first planar segment, which connects to the circumferential end face of the tooth body. This design facilitates winding the motor windings, simplifies the winding process, and improves winding efficiency. Furthermore, this design helps ensure winding density, guaranteeing a reasonable slot fill factor and current density, resulting in a more uniform magnetic flux distribution, reduced magnetic leakage, improved output torque quality, reduced torque ripple, and decreased vibration and noise.

[0030] In some embodiments, optionally, the inner peripheral wall of the yoke located between two adjacent teeth includes two first planar segments and an arcuate segment, with the arcuate segment located between the two first planar segments along the circumferential direction of the stator lamination.

[0031] In this embodiment, the structure of the yoke is further defined. The portion of the yoke located between two adjacent teeth has an inner peripheral wall. This inner peripheral wall is divided such that the inner peripheral wall of the yoke between two adjacent teeth includes two first planar segments and an arcuate segment. The arcuate segment is located between the two first planar segments along the circumferential direction of the stator lamination.

[0032] 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.

[0033] 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.

[0034] In some embodiments, optionally, the inner peripheral wall of the yoke located between two adjacent teeth includes two first planar segments and a plurality of second planar segments, with the plurality of second planar segments located between the two first planar segments along the circumferential direction of the stator lamination.

[0035] In this embodiment, the structure of the yoke is further defined. The portion of the yoke located between two adjacent teeth has an inner peripheral wall. This inner peripheral wall is divided such that the inner peripheral wall of the yoke located between two adjacent teeth includes two first planar segments and a plurality of second planar segments. Each first planar segment is connected to the tooth body of one tooth. Along the circumference of the stator lamination, the plurality of second planar segments are located between the two first planar segments and are arranged along the circumference of the stator lamination.

[0036] For example, multiple second-plane segments may have an angular structure. Alternatively, multiple second-plane segments may have a serrated structure.

[0037] 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.

[0038] 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.

[0039] In some embodiments, the included angle between the first planar segment and the circumferential end face of the tooth body is optionally denoted as α, where 70°≤α≤100°.

[0040] In this embodiment, along the circumferential direction of the stator lamination, the tooth body has a first end face and a second end face disposed opposite to each other. The first end face is connected to a first planar segment, and the second end face is connected to the first planar segment. The included angle between the first planar segment and the first end face is denoted as α. Similarly, the included angle between the first planar segment and the second end face is denoted as α. Wherein, 70°≤α≤100°.

[0041] This design optimizes the fit between the yoke and the teeth, ensuring that the angle α between the first planar segment and the circumferential end face of the tooth body 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 first planar segment 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.

[0042] If the included angle α between the first plane segment and 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.

[0043] If the included angle α between the first planar segment and the second end face is greater than 100°, then the width of the portion of the stator lamination that is opposite to the yoke and the toothed portion in the radial direction will be smaller, which will reduce the structural stiffness of the stator lamination and increase the vibration noise of the motor.

[0044] In some embodiments, the minimum distance between the inner and outer peripheral walls of the yoke is denoted as bsy, where 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

[0045] In this embodiment, the structure of the stator lamination is further defined.

[0046] Specifically, the minimum distance from the inner peripheral wall to the outer peripheral wall of the yoke is bsy, where bst1, bst2, bsy, R1 and R2 satisfy: 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

[0047] This design incorporates a mating structure between the inner and outer peripheral walls of the stator lamination's yoke. The ring width of the yoke affects the magnetic flux density of the yoke, the size of the stator slots, the motor's torque output, and the stator's stiffness. This application rationally defines the relationship between bst1, bst2, bsy, R1, and R2, optimizing the magnetic flux density distribution of the stator lamination's yoke while ensuring both the motor's output torque and the stator lamination's stiffness. This improves the motor's efficiency, thus balancing both output torque and efficiency.

[0048] If bsy is less than 0.2×(bst1+bst2), the ring width of the yoke is thinner and the stiffness of the stator lamination is smaller. There will be an oversaturation region in the magnetic flux density design, which will reduce the output torque, increase torque ripple, and increase the vibration and noise of the motor.

[0049] If bsy is greater than 0.5×(R1-R2), then the ring width of the yoke is thicker, which will waste the material of the stator laminations, affect the area of ​​the stator slots, and affect the slot fill factor and current density of the motor, thus affecting the performance of the motor.

[0050] In some embodiments, optionally, along the circumferential direction of the stator lamination, the minimum gap between 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.

[0051] In this embodiment, the structure of the stator lamination is further defined.

[0052] 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.

[0053] 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.

[0054] If (Z×bso) / (2×π×R2) is less than 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.

[0055] If (Z×bso) / (2×π×R2) is greater than 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.

[0056] 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.

[0057] 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.

[0058] The third aspect of this utility model provides a stator, comprising: a stator core as described in the second aspect.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] In this embodiment, the structure of the motor is further defined.

[0065] Specifically, the rotor includes a first rotor core and a plurality of first permanent magnets.

[0066] 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.

[0067] Each first permanent magnet is located in a magnet slot.

[0068] In other words, the rotor is a rotor with built-in permanent magnets.

[0069] 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.

[0070] In this embodiment, the structure of the motor is further defined.

[0071] Specifically, the rotor includes a second rotor core and multiple second permanent magnets.

[0072] 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.

[0073] In other words, the rotor is a surface-mounted permanent magnet rotor.

[0074] The fifth aspect of this utility model provides a pump body, including: a motor as described in the fourth aspect.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] The vehicles can also be gasoline-powered cars and hybrid cars.

[0080] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0081] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

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

[0083] Figure 2 A schematic diagram of the dimensions of the stator lamination of the first embodiment of this application is shown;

[0084] Figure 3 A partial structural schematic diagram of the stator lamination according to the second embodiment of this application is shown;

[0085] Figure 4 A schematic diagram of the structure of the motor according to the first embodiment of this application is shown;

[0086] Figure 5 A schematic diagram of the structure of the motor according to the second embodiment of this application is shown;

[0087] Figure 6 A schematic diagram is shown showing the curve of the ratio of torque ripple of the motor of this application as a function of X.

[0088] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0089] 10 Stator laminations, 100 Yoke, 110 Inner peripheral wall of yoke, 112 First planar segment, 114 Arc segment, 116 Second planar segment, 120 Outer peripheral wall of yoke, 200 Tooth, 210 Tooth body, 212 Circumferential end face of tooth body, 220 Tooth shoe, 30 Motor, 300 First rotor core, 310 Shaft hole, 320 Magnet slot, 400 First permanent magnet, 500 Second rotor core, 600 Second permanent magnet, 700 Stator core, 710 Mounting cavity. Detailed Implementation

[0090] 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.

[0091] 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.

[0092] The following reference Figures 1 to 6 Stator lamination 10, stator core 700, stator, motor 30, pump body and vehicle according to some embodiments of this application.

[0093] like Figure 1 , Figure 2 and Figure 3 As shown, a stator lamination 10 according to some embodiments of this application includes a yoke 100 and a plurality of teeth 200.

[0094] The yoke 100 has a ring structure.

[0095] Each tooth 200 includes a tooth body 210 and a tooth shoe 220.

[0096] The tooth body 210 is connected between the toothed shoe 220 and the inner peripheral wall 110 of the yoke.

[0097] Multiple teeth 200 are arranged at circumferential intervals along the stator lamination 10.

[0098] Along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually increases or decreases.

[0099] Along the circumference of the stator lamination 10, the width at the connection between the tooth body 210 and the tooth shoe 220 is denoted as bst1, and the width at the connection between the tooth body 210 and the yoke 100 is denoted as bst2.

[0100] The maximum distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke is denoted as R1.

[0101] 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.

[0102] Where |bst1-bst2| ≤ R1-R2.

[0103] 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.

[0104] Specifically, the tooth portion 200 includes a tooth body 210 and a tooth shoe 220, with the tooth body 210 connected between the inner peripheral wall 110 of the yoke and the tooth shoe 220.

[0105] Along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually increases. Alternatively, along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually decreases. That is, when the tooth body 210 is sectioned along an axis perpendicular to the stator lamination 10, the shape formed by the outline of the tooth body 210 in the section is trapezoidal.

[0106] Along the circumference of the stator lamination 10, the width at the connection between the tooth body 210 and the tooth shoe 220 is bst1, and the width at the connection between the tooth body 210 and the yoke 100 is bst2. The maximum distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke is R1, and the minimum distance from the center of the stator lamination 10 to the end face of the tooth shoe 220 away from the yoke 100 is R2.

[0107] The relationship between bst1, bst2, R1, and R2 is defined to satisfy |bst1-bst2| ≤ R1-R2. This setting defines the mating dimensions of the yoke 100 and the multiple teeth 200 of the stator lamination 10. That is, the mating dimensions of the yoke 100 and the multiple teeth 200 are defined while ensuring a reasonable slot fill factor and current density of the motor 30. When the motor 30, including the stator lamination 10 of this application, is operating, the magnetic field distribution at the annular yoke 100 and the multiple teeth 200 can be adjusted 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 the multiple teeth 200, the torque pulsation of the motor 30 is improved, thereby reducing the vibration and noise of the motor 30, enhancing the product's performance and market competitiveness.

[0108] In this embodiment, along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually increases.

[0109] In some other embodiments, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually decreases along the yoke 100 to the toothed shoe 220.

[0110] In some embodiments, bst1, bst2, R1, and R2 may optionally satisfy: 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5.

[0111] In this embodiment, the mating structure of bst1, bst2, R1 and R2 is further defined.

[0112] Specifically, bst1, bst2, R1, and R2 satisfy the condition: 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5. That is, when the ratio of (∣bst1-bst2∣) to (R1-R2) is greater than 0 and less than 0.5, the motor 30 exhibits better torque ripple and higher cost-effectiveness.

[0113] Alternatively, (∣bst1-bst2∣) / (R1-R2)=0.1, (∣bst1-bst2∣) / (R1-R2)=0.2, (∣bst1-bst2∣) / (R1-R2)=0.3 and (∣bst1-bst2∣) / (R1-R2)=0.4, etc., which will not be listed here.

[0114] Based on the fact that the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually increases along the yoke 100 to the tooth shoe 220, and bst1, bst2, R1 and R2 satisfy: |bst1-bst2|≤R1-R2, and 0.46≤R2 / R1<0.6.

[0115] like Figure 6 As shown, taking a 6-slot, 4-pole built-in permanent magnet motor as an example, let X = (|bst1-bst2|) / (R1-R2), Tripple * For per-unit values, Tripple * Let X be the ratio of torque ripple at different values ​​of X to torque ripple at X=0, derived from... Figure 6 It can be seen that when 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5, the torque ripple is better and the cost performance is the highest.

[0116] In some embodiments, R1 and R2 may optionally satisfy: 0.46 ≤ R2 / R1 < 0.6.

[0117] In this embodiment, the structure of the stator lamination 10 is further defined.

[0118] Specifically, bst1, bst2, R1, and R2 satisfy: |bst1-bst2| ≤ R1-R2, and 0.46 ≤ R2 / R1 < 0.6.

[0119] It is understandable that the yoke 100 and the two adjacent teeth 200 enclose the stator slot.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] In some embodiments, optionally, such as Figure 1 As shown, the inner peripheral wall 110 of the yoke includes a first planar segment 112.

[0125] The first planar segment 112 is connected to the circumferential end face 212 of the tooth body.

[0126] In this embodiment, the mating structure of the yoke 100 and the tooth 200 is further defined.

[0127] Specifically, the inner peripheral wall 110 of the yoke includes a first planar segment 112, which is connected to the circumferential end face 212 of the tooth body. 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 of the motor 30, reduced torque ripple, and reduced vibration and noise.

[0128] 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 first planar segments 112 and an arcuate segment 114.

[0129] Along the circumference of the stator lamination 10, the arc segment 114 is located between the two first planar segments 112.

[0130] In this embodiment, the structure of the yoke 100 is further defined. The portion of the yoke 100 located between two adjacent teeth 200 has an inner peripheral wall. This inner peripheral wall is divided such that the inner peripheral wall of the yoke 100 between two adjacent teeth 200 includes two first planar segments 112 and an arcuate segment 114. The arcuate segment 114 is located between the two first planar segments 112 along the circumferential direction of the stator lamination 10.

[0131] 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.

[0132] 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.

[0133] In some embodiments, optionally, such as Figure 3 As shown, the inner peripheral wall of the yoke 100 located between two adjacent teeth 200 includes two first planar segments 112 and a plurality of second planar segments 116.

[0134] Along the circumference of the stator lamination 10, a plurality of second planar segments 116 are located between two first planar segments 112.

[0135] In this embodiment, the structure of the yoke 100 is further defined. The portion of the yoke 100 located between two adjacent teeth 200 has an inner peripheral wall. This inner peripheral wall is divided such that the inner peripheral wall of the yoke 100 located between two adjacent teeth 200 includes two first planar segments 112 and a plurality of second planar segments 116. Each first planar segment 112 is connected to the tooth body 210 of one tooth 200. Along the circumference of the stator lamination 10, the plurality of second planar segments 116 are located between the two first planar segments 112 and are arranged along the circumference of the stator lamination 10.

[0136] For example, multiple second planar segments 116 may have an angular structure. Alternatively, multiple second planar segments 116 may have a serrated structure.

[0137] 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.

[0138] 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.

[0139] In some embodiments, optionally, such as Figure 2 As shown, the included angle between the first planar segment and the circumferential end face 212 of the tooth body is denoted as α, where 70°≤α≤100°.

[0140] In this embodiment, along the circumferential direction of the stator lamination 10, the gear body 210 has a first end face and a second end face disposed opposite to each other. The first end face is connected to a first planar segment, and the second end face is connected to the first planar segment. The included angle between the first planar segment and the first end face is denoted as α. Similarly, the included angle between the first planar segment and the second end face is denoted as α. Wherein, 70°≤α≤100°.

[0141] This design optimizes the fit between the yoke 100 and the tooth 200. The included angle α between the first planar segment 112 and the circumferential end face 212 of the tooth body 210 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 first 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.

[0142] If the included angle α between the first planar segment and the second end face is less than 70°, then the portion of the yoke 100 and the tooth 200 that are opposite each other will have a larger width in the radial direction of 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.

[0143] If the included angle α between the first planar segment and the second end face is greater than 100°, then the width of the portion of the yoke 100 and the tooth 200 that are opposite each other in the radial direction of the stator lamination 10 will be smaller, which will reduce the structural rigidity of the stator lamination 10 and increase the vibration noise of the motor 30.

[0144] Alternatively, α = 75°, α = 80°, α = 85°, α = 90° and α = 95°, etc., which will not be listed here.

[0145] In some embodiments, optionally, such as Figure 2 As shown, the minimum distance from the inner peripheral wall 110 to the outer peripheral wall of the yoke is denoted as bsy.

[0146] Wherein, 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

[0147] In this embodiment, the structure of the stator lamination 10 is further defined.

[0148] Specifically, the minimum distance between the inner peripheral wall 110 and the outer peripheral wall of the yoke is bsy, where bst1, bst2, bsy, R1 and R2 satisfy: 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

[0149] This design incorporates a mating structure between the inner and outer peripheral walls 110 of the yoke portion of the stator lamination 10. The annular width of the yoke portion 100 can influence the magnetic flux density of the yoke portion 100, the size of the stator slots, the torque output of the motor 30, and the stiffness of the stator. This application reasonably defines the relationship between bst1, bst2, bsy, R1, and R2, optimizing the magnetic flux density distribution of the yoke portion 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 for improving the efficiency of the motor 30, thus balancing the output torque and efficiency of the motor 30.

[0150] If bsy is less than 0.2×(bst1+bst2), then the ring width of the yoke 100 is thinner and the stiffness of the stator lamination 10 is smaller, which will result in an oversaturation region in the magnetic flux density design. This will reduce the output torque, increase torque pulsation, and increase the vibration and noise of the motor 30.

[0151] If bsy is greater than 0.5×(R1-R2), then the ring width of the yoke 100 is thicker, which will waste the material of the stator lamination 10, affect the area of ​​the stator slot, and affect the slot fill factor and current density of the motor 30, thus affecting the performance of the motor 30.

[0152] In some embodiments, optionally, such as Figure 2 As shown, 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.

[0153] The number of teeth 200 is denoted as Z.

[0154] Wherein, 0.02≤(Z×bso) / (2×π×R2)≤0.35.

[0155] In this embodiment, the structure of the stator lamination 10 is further defined.

[0156] 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.

[0157] 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.

[0158] If (Z×bso) / (2×π×R2) is less than 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.

[0159] If (Z×bso) / (2×π×R2) is greater than 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.

[0160] like Figure 4 and Figure 5 As shown, a stator core 700 according to some embodiments of this application includes: a plurality of stator laminations 10 as described in any of the above embodiments.

[0161] Multiple stator laminations are stacked in 10 layers.

[0162] The teeth 200 of multiple stator laminations 10 enclose the mounting cavity 710.

[0163] The stator core 700 provided by this utility model includes multiple stator laminations 10.

[0164] The stator lamination 10 includes a yoke 100 and a plurality of teeth 200. Any one of the 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.

[0165] Specifically, the tooth portion 200 includes a tooth body 210 and a tooth shoe 220, with the tooth body 210 connected between the inner peripheral wall 110 of the yoke and the tooth shoe 220.

[0166] Along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually increases. Alternatively, along the yoke 100 to the toothed shoe 220, the width of the tooth body 210 in the circumferential direction of the stator lamination 10 gradually decreases. That is, when the tooth body 210 is sectioned along an axis perpendicular to the stator lamination 10, the shape formed by the outline of the tooth body 210 in the section is trapezoidal.

[0167] Along the circumference of the stator lamination 10, the width at the connection between the tooth body 210 and the tooth shoe 220 is bst1, and the width at the connection between the tooth body 210 and the yoke 100 is bst2. The maximum distance from the center of the stator lamination 10 to the outer peripheral wall 120 of the yoke is R1, and the minimum distance from the center of the stator lamination 10 to the end face of the tooth shoe 220 away from the yoke 100 is R2.

[0168] The relationship between bst1, bst2, R1, and R2 is defined to satisfy |bst1-bst2| ≤ R1-R2. This setting defines the mating dimensions of the yoke 100 and the multiple teeth 200 of the stator lamination 10. That is, the mating dimensions of the yoke 100 and the multiple teeth 200 are defined while ensuring a reasonable slot fill factor and current density of the motor 30. When the motor 30, including the stator lamination 10 of this application, is operating, the magnetic field distribution at the annular yoke 100 and the multiple teeth 200 can be adjusted 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 the multiple teeth 200, the torque pulsation of the motor 30 is improved, thereby reducing the vibration and noise of the motor 30, enhancing the product's performance and market competitiveness.

[0169] A stator according to some embodiments of this application includes a stator core 700 as described in the above embodiments. Because it includes the stator core 700 as described in the above embodiments, it possesses all the beneficial effects of the stator core 700 described above, which will not be described in detail here.

[0170] like Figure 4 and Figure 5 As shown, an electric motor 30 according to some embodiments of the present application includes: a rotor and a stator as described in the above embodiments.

[0171] The rotor is located in the mounting cavity 710.

[0172] The rotor can rotate relative to the stator.

[0173] 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.

[0174] It is understandable that the rotor is located in the stator mounting cavity 710, and the rotor can rotate relative to the stator. That is, the motor 30 is a motor with an inner rotor and an outer stator.

[0175] In some embodiments, optionally, such as Figure 4 As shown, the rotor includes a first rotor core 300 and a plurality of first permanent magnets 400.

[0176] The first rotor core 300 is provided with a shaft hole 310 and multiple magnet slots 320.

[0177] Each magnet slot 320 is located between the shaft hole 310 and the outer peripheral wall of the first rotor core 300.

[0178] Multiple magnet slots 320 are arranged at circumferential intervals along the shaft hole 310.

[0179] Each first permanent magnet 400 is located in a magnet slot 320.

[0180] In this embodiment, the structure of the motor 30 is further defined.

[0181] Specifically, the rotor includes a first rotor core 300 and a plurality of first permanent magnets 400.

[0182] The first rotor core 300 is provided with a shaft hole 310 and a plurality of magnet slots 320. The plurality of magnet slots 320 are arranged at intervals along the circumference of the shaft hole 310, and any one of the plurality of magnet slots 320 is located between the shaft hole 310 and the outer peripheral wall of the first rotor core 300.

[0183] Each first permanent magnet 400 is located in a magnet slot 320.

[0184] In other words, the rotor is a rotor with built-in permanent magnets.

[0185] In some embodiments, optionally, such as Figure 5 As shown, the rotor includes a second rotor core 500 and multiple second permanent magnets 600.

[0186] Each second permanent magnet 600 is disposed on the outer peripheral wall of the second rotor core 500, and multiple second permanent magnets 600 are arranged at intervals along the circumference of the rotor.

[0187] In this embodiment, the structure of the motor 30 is further defined.

[0188] Specifically, the rotor includes a second rotor core 500 and a plurality of second permanent magnets 600.

[0189] Any one of the plurality of second permanent magnets 600 is disposed on the outer peripheral wall of the second rotor core 500, and the plurality of second permanent magnets 600 are arranged at intervals along the circumference of the rotor.

[0190] In other words, the rotor is a surface-mounted permanent magnet rotor.

[0191] A pump body according to some embodiments of this application includes: a motor 30 as in any of the above embodiments.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] The vehicles can also be gasoline-powered cars and hybrid cars.

[0197] Optionally, the stator lamination 10 has a sheet-like structure. The stator lamination 10 includes: a yoke 100, which is annular; and a plurality of teeth 200, each tooth 200 connected to the inner peripheral wall 110 of the yoke, the plurality of teeth 200 being spaced apart circumferentially along the stator lamination 10; each tooth 200 includes a toothed shoe 220 and a tooth body 210, one end of the tooth body 210 being connected to the inner peripheral wall 110 of the yoke, and the other end of the tooth body 210 being connected to the toothed shoe 220. The plurality of tooth bodies 210 are evenly and spaced apart circumferentially along the stator lamination 10. The tooth body 210 is trapezoidal in shape. The circumferential width of the tooth body 210 near the end of the yoke 100 is bst2, and the circumferential width of the tooth body 210 near the end of the tooth shoe 220 is bst1. R1 is the maximum distance from the outer peripheral wall 120 of the yoke to the center of the stator lamination 10, and R2 is the minimum distance from the end face of the tooth shoe 220 away from the yoke 100 to the center of the stator lamination 10. Among them, bst1, bst2, R1 and R2 satisfy: 0 < (|bst1-bst2|) / (R1-R2) < 0.5.

[0198] Any two adjacent teeth 200 and yoke 100 enclose a stator slot, which is used to place the winding.

[0199] R1 and R2 satisfy: 0.46≤R2 / R1<0.6.

[0200] The inner peripheral wall 110 of the yoke includes a plurality of first planar segments 112 and a plurality of arcuate segments 114, wherein the first planar segments 112 are connected to the circumferential end face 212 of the tooth body.

[0201] The included angle between the first planar segment 112 and the circumferential end face 212 of the tooth body is denoted as α, where 70°≤α≤100°.

[0202] The minimum distance from the inner peripheral wall 110 to the outer peripheral wall of the yoke is denoted as bsy, where 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

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

[0204] The stator core 700 includes multiple stacked stator laminations 10.

[0205] Optionally, the motor 30 includes a stator and a rotor. The stator includes a stator core 700, and the rotor is disposed in a mounting cavity 710 of the stator core 700. The rotor is rotatable relative to the stator core 700.

[0206] 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5, such as Figure 6 As shown, taking a 6-slot, 4-pole built-in permanent magnet motor as an example, let X = (|bst1-bst2|) / (R1-R2), Tripple * For per-unit values, Tripple * Let X be the ratio of torque ripple at different values ​​of X to torque ripple at X=0, derived from... Figure 6 It can be seen that when 0 < (∣bst1-bst2∣) / (R1-R2) < 0.5, the torque ripple is better and the cost performance is the highest.

[0207] 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.

[0208] 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 the teeth including a tooth body and a tooth shoe, the tooth body being connected between the tooth shoe and the inner peripheral wall of the yoke, the multiple teeth being arranged circumferentially spaced along the stator lamination; Along the yoke to the toothed shoe, the width of the tooth body in the circumferential direction of the stator lamination gradually increases or decreases; Along the circumferential direction of the stator lamination, the width at the connection between the tooth body and the tooth shoe is denoted as bst1, and the width at the connection between the tooth body and the yoke is denoted as bst2; 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 toothed shoe away from the yoke is denoted as R2. Where |bst1-bst2| ≤ R1-R2.

2. The stator lamination according to claim 1, characterized in that, bst1, bst2, R1, and R2 satisfy: 0 < (∣bst1-bst2∣) / (R1-R2) < 0.

5.

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

6.

4. The stator lamination according to claim 1 or 2, characterized in that, The inner peripheral wall of the yoke includes a first planar segment, which is connected to the circumferential end face of the tooth body.

5. The stator lamination according to claim 4, characterized in that, The inner peripheral wall of the yoke located between two adjacent teeth includes two first planar segments and an arc segment. Along the circumference of the stator lamination, the arc segment is located between the two first planar segments.

6. The stator lamination according to claim 4, characterized in that, The inner peripheral wall of the yoke located between two adjacent teeth includes two first planar segments and a plurality of second planar segments. Along the circumferential direction of the stator lamination, the plurality of second planar segments are located between two first planar segments.

7. The stator lamination according to claim 4, characterized in that, The included angle between the first planar segment and the circumferential end face of the tooth body is denoted as α, where 70°≤α≤100°.

8. The stator lamination according to claim 1 or 2, characterized in that, The minimum distance between the inner and outer peripheral walls of the yoke is denoted as bsy, where 0.2×(bst1+bst2)≤bsy≤0.5×(R1-R2).

9. The stator lamination according to claim 1 or 2, characterized in that, 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.

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

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

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

13. The motor according to claim 12, 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.

14. The motor according to claim 12, 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.

15. A pump body, characterized in that, include: The motor as described in any one of claims 12 to 14.

16. A vehicle, characterized in that, include: The motor as described in any one of claims 12 to 14; or The pump body as described in claim 15.

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