Stator, motor, pump body and vehicle

Abstract

The utility model provides a stator, a motor, a pump body and a vehicle. Wherein the stator comprises a stator iron core, and the stator iron core comprises a yoke part which is of an annular structure; each tooth part comprises a tooth body and a tooth boot, and any two adjacent tooth parts and the yoke part enclose a stator slot; the inner circumferential wall of the yoke part between two adjacent tooth parts comprises two plane sections and a connection section, the connection section is connected between the two plane sections along the circumferential direction of the stator core, each plane section is connected with one tooth part, and the connection section comprises at least one of a cambered surface section and a folded surface section; the inner diameter of the stator core is recorded as D1, the number of the stator slots is recorded as Z, the circumferential width of the tooth body is recorded as t, and the radial width of the yoke part is recorded as h; wherein t is larger than or equal to h, and Z * t is smaller than pi * D1. According to the invention, the magnetic field distribution of the yoke part and the plurality of tooth parts can be adjusted, the reasonable slot space factor and current density of the motor are ensured, and the efficiency of the motor is improved.

Description

Technical Field

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

[0002] At present, with the promotion and increase in demand for new energy vehicles, the requirements for intelligent and energy-efficient pump bodies are gradually increasing.

[0003] The pump body includes a motor, which is a key component that determines the performance of the pump body. In the related art, the structure of the motor is unreasonable, the copper loss and iron loss of the motor are high, and the efficiency of the motor is low. Utility Model Content

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

[0005] To this end, a first aspect of the present application provides a stator.

[0006] A second aspect of the present application provides an electric motor.

[0007] A third aspect of the present application provides a pump body.

[0008] A fourth aspect of the present application provides a vehicle.

[0009] In view of this, the first aspect of the present application provides a stator, including a stator core, which includes: a yoke, which is an annular structure; a plurality of teeth, which include a tooth body and a tooth shoe, and the tooth body is connected between the inner circumferential wall of the yoke and the tooth shoe. The plurality of teeth are arranged at intervals along the circumference of the stator core, and any two adjacent teeth and the yoke enclose a stator slot; the inner circumferential wall of the yoke located between two adjacent teeth includes two plane segments and a connecting segment, and along the circumference of the stator core, the connecting segment is connected between the two plane segments, each plane segment is connected to a tooth, and the connecting segment includes at least one of an arc surface segment and a folded surface segment; the inner diameter of the stator core is denoted as D1, the number of stator slots is denoted as Z, the circumferential width of the tooth body is denoted as t, and the radial width of the yoke is denoted as h; wherein, t≥h, Z×t<π×D1.

[0010] A stator provided in the present application includes a stator core, which includes a yoke and a plurality of teeth.

[0011] Each of the plurality of tooth portions includes a tooth body and a tooth shoe, the tooth body is connected between the inner peripheral wall of the yoke portion and the tooth shoe, and the plurality of tooth portions are spaced apart along the circumferential direction of the stator core.

[0012] In addition, along the circumference of the stator core, the inner circumferential wall of the yoke between two adjacent teeth includes a plane segment, a connecting segment and a plane segment. That is, the inner circumferential wall of the yoke between two adjacent teeth includes two plane segments and a connecting segment, and along the circumference of the stator core, the connecting segment is connected between the two plane segments. Each plane segment is connected to a tooth. This arrangement makes it easier to wind the motor windings, simplifies the winding difficulty of the windings, and helps improve the winding efficiency of the windings. This arrangement is also conducive to ensuring the winding density of the windings, ensuring a reasonable slot fill rate and current density of the motor, making the magnetic flux distribution more uniform, reducing magnetic leakage, and improving the output torque quality of the motor, reducing the torque pulsation of the motor, and reducing the vibration noise of the motor.

[0013] Furthermore, the inner diameter of the stator core is denoted as D1, the number of stator slots is Z, the circumferential width of the tooth body is denoted as t, and the radial width of the yoke is denoted as h.

[0014] The relationship between D1, Z, t, and h is defined to satisfy t ≥ h, Z × t < π × D1. This setting can adjust the magnetic field distribution of the yoke and multiple teeth, ensuring that the motor has a reasonable slot fill factor and current density, thereby improving the motor's efficiency, performance, and market competitiveness.

[0015] It's understandable that magnetic lines of force pass through the teeth before the yoke. If the circumferential width t of the tooth body in the stator core is smaller than the radial width h of the yoke, the magnetic field at the teeth is likely to saturate, increasing current and, consequently, copper and iron losses. At the same time, if D1, Z, and t satisfy Z × t < π × D1, the slot fill factor is guaranteed, balancing copper and iron losses.

[0016] As can be seen, based on the matching structure of the yoke and multiple teeth, the relationship between D1, Z, t, and h is further defined to satisfy t ≥ h, Z × t < π × D1. This helps improve the output torque quality of the motor and enhances its efficiency.

[0017] The connecting section includes at least one of a curved surface section and a folded surface section. That is, the connecting section includes a curved surface section. Alternatively, the connecting section includes a folded surface section. Alternatively, a portion of the connecting section is a curved surface section, and another portion of the connecting section is a folded surface section.

[0018] It can be understood that a plurality of planar segments connected in sequence form a folded surface segment.

[0019] The stator core described above in this application may also have the following additional technical features:

[0020] In some embodiments, optionally, t, h, Z and D1 satisfy: 1≤t / h≤1.5, 0.3≤Z×t / (π×D1)≤0.36.

[0021] In this embodiment, the coordination structure of D1, Z, t and h is further limited.

[0022] Specifically, t, h, Z, and D1 satisfy the following conditions: 1 ≤ t / h ≤ 1.5, 0.3 ≤ Z × t / (π × D1) ≤ 0.36. When the ratio of t to h is greater than or equal to 1 and less than or equal to 1.5, the magnetic field distribution is rationalized, the motor current density is guaranteed, and both copper and iron losses are balanced. When the ratio of the product of Z and t to the product of t and D1 is greater than or equal to 0.3 and less than or equal to 0.36, the magnetic field distribution is rationalized, the motor slot fill rate is guaranteed, and both copper and iron losses are balanced.

[0023] In some embodiments, optionally, the outer diameter of the stator core is denoted as D2, wherein 0.45≤D1 / D2≤0.52.

[0024] In this embodiment, the structure of the stator core is further defined.

[0025] Specifically, the outer diameter of the stator core is denoted as D2. The relationship between the inner diameter D1 and the outer diameter D2 of the stator core satisfies 0.45 ≤ D1 / D2 ≤ 0.52. This ensures the motor's slot fill factor and the proper fit between the stator and rotor, thus ensuring the motor's magnetic load remains within a reasonable range.

[0026] Based on the assumption that the size of D2 remains unchanged, if D1 / D2 is less than 0.45, the corresponding rotor dimensions must be increased accordingly, and the size of the rotor's permanent magnet will be too large. In this case, the motor's magnetic load will be large, magnetic saturation will easily occur, and the iron loss will increase. At the same time, the copper loss will increase.

[0027] Based on the assumption that the size of D2 remains unchanged, if D1 / D2>0.52, the corresponding rotor dimensions must be reduced accordingly, and the size of the rotor's permanent magnet will be too small, the current will increase, and at the same time, the copper loss will increase, ultimately reducing the efficiency of the motor.

[0028] In some embodiments, optionally, the maximum value of the distance from the planar segment to the center of the stator core is less than or equal to the minimum value of the distance from the connecting segment to the center of the stator core.

[0029] In this embodiment, the structure of the stator core is further defined.

[0030] The maximum distance from the planar segment to the center of the stator core is less than or equal to the minimum distance from the connecting segment to the center of the stator core. Alternatively, the minimum distance from the planar segment to the outer peripheral wall of the yoke is greater than or equal to the maximum distance from the connecting segment to the outer peripheral wall of the yoke. In other words, the maximum distance from the bottom of the stator slot to the center of the stator core is the maximum distance from the connecting segment to the center of the stator core.

[0031] From this, it can be seen that when the maximum distance from the planar segment to the center of the stator core is less than or equal to the minimum distance from the connecting segment to the center of the stator core, the relationship between D1, Z, t and h satisfies t≥h, Z×t<π×D1.

[0032] In some embodiments, optionally, the axial height T1 of the stator core, the outer diameter D2 of the stator core, and D1 satisfy: 0.13≤T1×D1 / (D2) 2 ≤0.19.

[0033] In this embodiment, the structure of the stator core is further defined.

[0034] The axial height of the stator core is recorded as T1, the outer diameter of the stator core is recorded as D2 and the inner diameter of the stator core is recorded as D1. T1, D1 and D2 satisfy 0.13≤T1×D1 / (D2) 2 ≤0.19. This setting limits the matching size of the stator core, taking into account the production cost and torque density of the motor, making the motor more cost-effective (for example, cost-effectiveness refers to the ratio of efficiency to cost).

[0035] The second aspect of the present invention provides an electric motor, comprising: a rotor, the rotor comprising a rotor core and permanent magnets, the permanent magnets being arranged on the outer peripheral wall of the rotor core or placed in magnet slots opened on the rotor core; and a stator as in the first aspect, the rotor being located radially inward of the stator, and the rotor being capable of rotating relative to the stator.

[0036] The motor provided by the utility model comprises a rotor and a stator.

[0037] The rotor includes a rotor core and permanent magnets.

[0038] It is understood that the rotor is located radially inside the stator and is rotatable relative to the stator, that is, the motor is an inner rotor and outer stator motor.

[0039] Optionally, the permanent magnet is disposed in a magnet slot provided on the rotor core.

[0040] The rotor comprises a first rotor core, which is provided with an axial hole and a plurality of magnet slots. Each magnet slot is located between the axial hole and the outer peripheral wall of the first rotor core, and the plurality of magnet slots are spaced apart along the circumference of the axial hole. A plurality of permanent magnets are disposed in each magnet slot. In other words, the rotor is a rotor with internal permanent magnets.

[0041] Optionally, the permanent magnets are arranged on the outer peripheral wall of the rotor core.

[0042] The rotor includes: a second rotor core; a plurality of permanent magnets, each of which is disposed on the outer peripheral wall of the second rotor core, and the plurality of permanent magnets are spaced apart along the circumference of the rotor. In other words, the rotor is a surface-mounted permanent magnet rotor.

[0043] In some embodiments, optionally, the remanence Br (T) of the permanent magnet, the axial height T1 (mm) of the stator core, the outer diameter D2 (mm) and D1 (mm) of the stator core satisfy: 12 (T·mm) ≤ T1×Br×D1 / D2 ≤ 13.5 (T·mm).

[0044] In this embodiment, the structure of the motor is further defined.

[0045] The remanence of the permanent magnet is denoted as Br (T), the axial height of the stator core is denoted as T1 (mm), the outer diameter of the stator core is denoted as D2 (mm), and the inner diameter of the stator core is denoted as D1 (mm). The relationship between Br, T1, D2, and D1 satisfies 12 (T·mm) ≤ T1 × Br × D1 / D2 ≤ 13.5 (T·mm). This ensures that the magnetic energy generated by the rotor during operation is distributed within the motor, avoiding oversaturated and undersaturated areas in the magnetic density design, and balancing copper and iron losses to improve motor efficiency.

[0046] In some embodiments, optionally, the maximum distance d (mm) from the bottom of the stator slot to the center of the stator core, the remanence Br (T) of the permanent magnet, D1 (mm) and h (mm) satisfy: (2×d-D1)×Br / h≥4.5 (T).

[0047] In this embodiment, the structure of the motor is further defined.

[0048] The relationship among d, Br, D1 and h satisfies (2×d-D1)×Br / h≥4.5(T).

[0049] This setting takes into account the magnetic density design and the overall size of the stator core, so that the magnetic density is evenly distributed, and takes into account the cost of the motor and the electromagnetic performance of the motor. While ensuring that the motor has a reasonable current density, it does not increase the manufacturing cost of the motor, maximizes the output torque and efficiency of the motor, and makes the motor more cost-effective (for example, cost-effectiveness refers to the ratio of efficiency to cost).

[0050] In some embodiments, optionally, the number of poles P and Z of the motor satisfies: Z / P=3 / 2, or Z / P=6 / 5.

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

[0052] Specifically, the number of poles P of the motor and the number of stator slots Z satisfy Z / P=3 / 2.

[0053] Specifically, the number of poles P of the motor and the number of stator slots Z satisfy Z / P=6 / 5.

[0054] The third aspect of the present invention provides a pump body, comprising: the motor as in the second aspect.

[0055] The pump body provided by the present invention includes the motor as in the second aspect, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0056] Optionally, the pump body comprises a water pump.

[0057] A fourth aspect of the present invention provides a vehicle, comprising: the motor as in the second aspect; or the pump body as in the third aspect.

[0058] The vehicle provided by the present invention includes the motor as in the fourth aspect or the pump body as in the fifth aspect, and therefore has all the beneficial effects of the above-mentioned motor or pump body, which will not be described one by one here.

[0059] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0060] The vehicle may also be a gasoline-powered vehicle.

[0061] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0063] Figure 1 A partial structural schematic diagram of a motor according to a first embodiment of the present application is shown;

[0064] Figure 2 A partial structural schematic diagram of the stator core of the first embodiment of the present application is shown;

[0065] Figure 3A partial structural schematic diagram of a motor according to a second embodiment of the present application is shown;

[0066] Figure 4 A partial structural schematic diagram of a motor according to a third embodiment of the present application is shown;

[0067] Figure 5 A partial structural schematic diagram of a motor according to a fourth embodiment of the present application is shown;

[0068] Figure 6 A schematic diagram of the comparison curves of the cost performance, simulation efficiency and cost of the original example, Example 1 of the present application, Example 2 of the present application, Example 3 of the present application, Comparative Example 1 and Comparative Example 2 is shown.

[0069] in, Figures 1 to 5 The corresponding relationship between the reference numerals and component names is as follows:

[0070] 100 yoke, 110 inner circumferential wall of the yoke, 112 plane segment, 114 connecting segment, 120 outer circumferential wall of the yoke, 200 tooth segment, 210 tooth body, 220 tooth shoe, 300 stator slot, 40 stator core, 400 mounting cavity, 50 motor, 500 rotor, 510 first rotor core, 512 shaft hole, 514 magnet slot, 520 permanent magnet, 530 second rotor core. DETAILED DESCRIPTION

[0071] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0072] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0073] Refer to the following Figures 1 to 6 A stator, a motor 50 , a pump body, and a vehicle according to some embodiments of the present application.

[0074] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, a stator according to some embodiments of the present application includes a stator core 40, which includes: a yoke 100, which is an annular structure; a plurality of teeth 200, which include a tooth body 210 and a tooth shoe 220, and the tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The plurality of teeth 200 are arranged at intervals along the circumference of the stator core 40, and any two adjacent teeth 200 and the yoke 100 enclose a stator slot 300; the teeth of the yoke 100 located between two adjacent teeth are arranged at intervals. The inner circumferential wall between the stator core 40 and the tooth portion 200 includes two planar segments 112 and a connecting segment 114. Along the circumference of the stator core 40, the connecting segment 114 is connected between the two planar segments 112. Each planar segment 112 is connected to a tooth portion 200. The connecting segment 114 includes at least one of an arc surface segment and a folded surface segment. The inner diameter of the stator core 40 is denoted as D1, the number of stator slots 300 is denoted as Z, the circumferential width of the tooth body 210 is denoted as t, and the radial width of the yoke 100 is denoted as h. Wherein, t≥h, Z×t<π×D1.

[0075] A stator provided in the present application includes a stator core 40 , and the stator core 40 includes a yoke 100 and a plurality of teeth 200 .

[0076] Each of the plurality of teeth 200 includes a tooth body 210 and a tooth shoe 220 . The tooth body 210 is connected between the inner peripheral wall 110 of the yoke and the tooth shoe 220 . The plurality of teeth 200 are spaced apart along the circumferential direction of the stator core 40 .

[0077] In addition, along the circumference of the stator core 40, the inner circumferential wall of the yoke 100 located between two adjacent tooth portions 200 includes a plane segment 112, a connecting segment 114, and a plane segment 112. That is, the inner circumferential wall of the yoke 100 located between two adjacent tooth portions 200 includes two plane segments 112 and a connecting segment 114, and along the circumference of the stator core 40, the connecting segment 114 is connected between the two plane segments 112. Each plane segment 112 is connected to one tooth portion 200. This arrangement makes it easier to wind the windings of the motor 50, simplifies the winding difficulty of the windings, and helps improve the winding efficiency of the windings. This arrangement is also conducive to ensuring the winding density of the windings, ensuring a reasonable slot fill rate and current density of the motor 50, making the magnetic flux distribution more uniform, reducing magnetic leakage, and improving the output torque quality of the motor 50, reducing the torque pulsation of the motor 50, and reducing the vibration noise of the motor 50.

[0078] Furthermore, the inner diameter of the stator core 40 is denoted as D1, the number of the stator slots 300 is Z, the circumferential width of the tooth body 210 is denoted as t, and the radial width of the yoke 100 is denoted as h.

[0079] The relationship between D1, Z, t, and h is defined to satisfy t ≥ h, Z × t < π × D1. This configuration can adjust the magnetic field distribution of the yoke 100 and the plurality of teeth 200, ensuring that the motor 50 has a reasonable slot fill rate and current density, thereby improving the efficiency of the motor 50, and enhancing its performance and market competitiveness.

[0080] It can be understood that the magnetic lines of force first pass through the teeth 200 and then through the yoke 100. If the circumferential width t of the tooth body 210 in the stator core 40 is smaller than the radial width h of the yoke 100 in the stator core 40, the magnetic field at the teeth 200 will easily saturate, resulting in increased current and copper and iron losses. At the same time, if D1, Z, and t satisfy Z×t<π×D1, the slot fill factor can be guaranteed, and both copper and iron losses can be balanced.

[0081] As can be seen, based on the matching structure of the yoke 100 and the plurality of teeth 200, the relationship between D1, Z, t, and h is further defined to satisfy t ≥ h, Z × t < π × D1. This helps improve the output torque quality of the motor 50 and enhances the efficiency of the motor 50.

[0082] The connecting section 114 includes at least one of a curved surface segment and a folded surface segment. That is, the connecting section 114 includes a curved surface segment. Alternatively, the connecting section 114 includes a folded surface segment. Alternatively, a portion of the connecting section 114 is a curved surface segment, while another portion of the connecting section 114 is a folded surface segment.

[0083] It can be understood that a plurality of successively connected planar segments 112 form a folded surface segment.

[0084] In some embodiments, optionally, t, h, Z and D1 satisfy: 1≤t / h≤1.5, 0.3≤Z×t / (π×D1)≤0.36.

[0085] In this embodiment, the coordination structure of D1, Z, t and h is further limited.

[0086] Specifically, t, h, Z, and D1 satisfy the following conditions: 1 ≤ t / h ≤ 1.5, 0.3 ≤ Z × t / (π × D1) ≤ 0.36. When the ratio of t to h is greater than or equal to 1 and less than or equal to 1.5, a rational magnetic field distribution is ensured, the current density of motor 50 is guaranteed, and both copper and iron losses of motor 50 are balanced. When the ratio of the product of Z and t to the product of t and D1 is greater than or equal to 0.3 and less than or equal to 0.36, a rational magnetic field distribution is ensured, the slot fill rate of motor 50 is guaranteed, and both copper and iron losses of motor 50 are balanced.

[0087] In some embodiments, optionally, as Figure 1 and Figure 5As shown, the outer diameter of the stator core 40 is denoted as D2, where 0.45≤D1 / D2≤0.52.

[0088] In this embodiment, the structure of the stator core 40 is further defined.

[0089] Specifically, the outer diameter of the stator core 40 is denoted as D2. The relationship between the inner diameter D1 of the stator core 40 and the outer diameter D2 of the stator core 40 satisfies 0.45≤D1 / D2≤0.52. This ensures the slot fill ratio of the motor 50 and the matching dimensions of the stator and rotor 500 of the motor 50, thereby ensuring that the magnetic load of the motor 50 is within a reasonable range.

[0090] Based on the fact that the size of D2 remains unchanged, if D1 / D2 is less than 0.45, the corresponding outer dimensions of the rotor 500 will be increased accordingly, and the size of the permanent magnet 520 of the rotor 500 will be too large. In this case, the magnetic load of the motor 50 will be large, and magnetic saturation will easily occur. The iron loss will increase, and at the same time, the copper loss will increase.

[0091] Based on the fact that the size of D2 remains unchanged, if D1 / D2>0.52, the corresponding outer dimensions of the rotor 500 will be reduced accordingly, and the size of the permanent magnet 520 of the rotor 500 will be too small, the current will increase, and at the same time, the copper loss will increase, which will eventually reduce the efficiency of the motor 50.

[0092] In some embodiments, optionally, the maximum distance from the planar segment 112 to the center of the stator core 40 is less than or equal to the minimum distance from the connecting segment 114 to the center of the stator core 40 .

[0093] In this embodiment, the structure of the stator core 40 is further defined.

[0094] The maximum distance between the planar segment 112 and the center O1 of the stator core 40 is less than or equal to the minimum distance between the connecting segment 114 and the center O1 of the stator core 40. Alternatively, the minimum distance between the planar segment 112 and the outer peripheral wall 120 of the yoke is greater than or equal to the maximum distance between the connecting segment 114 and the outer peripheral wall 120 of the yoke. In other words, the maximum distance between the bottom of the stator slot 300 and the center of the stator core 40 is the maximum distance between the connecting segment 114 and the center of the stator core 40.

[0095] From this, it can be seen that when the maximum distance from the planar segment 112 to the center of the stator core 40 is less than or equal to the minimum distance from the connecting segment 114 to the center of the stator core 40, the relationship between D1, Z, t and h satisfies t≥h, Z×t<π×D1.

[0096] In some embodiments, optionally, the axial height T1 of the stator core 40, the outer diameter D2 of the stator core 40, and D1 satisfy: 0.13≤T1×D1 / (D2) 2 ≤0.19.

[0097] In this embodiment, the structure of the stator core 40 is further defined.

[0098] The axial height of the stator core 40 is recorded as T1, the outer diameter of the stator core 40 is recorded as D2, and the inner diameter of the stator core 40 is recorded as D1. T1, D1 and D2 satisfy 0.13≤T1×D1 / (D2) 2 This setting limits the matching size of the stator core 40 , takes into account both the production cost and torque density of the motor 50 , and makes the motor 50 more cost-effective (eg, cost-effective refers to the ratio of efficiency to cost).

[0099] According to some other embodiments of the present application, an electric motor 50 includes: a rotor 500, the rotor 500 includes a rotor core and permanent magnets 520, the permanent magnets 520 are arranged on the outer peripheral wall of the rotor core or placed in magnet slots 514 opened on the rotor core; and a stator as in any of the above embodiments, the rotor 500 is located radially inside the stator, and the rotor 500 can rotate relative to the stator.

[0100] The motor 50 provided in this application includes a rotor 500 and a stator.

[0101] The rotor 500 includes a rotor core and permanent magnets 520 .

[0102] It is understood that the rotor 500 is located radially inwardly of the stator and is rotatable relative to the stator. The rotor 500 is located within the stator mounting cavity 400. In other words, the motor 50 is an inner rotor outer stator motor.

[0103] Optionally, the permanent magnet 520 is disposed in a magnet slot 514 provided on the rotor core.

[0104] The rotor 500 includes a first rotor core 510 having an axial hole 512 and a plurality of magnet slots 514. Each magnet slot 514 is located between the axial hole 512 and the outer peripheral wall of the first rotor core 510, and the plurality of magnet slots 514 are spaced apart along the circumference of the axial hole 512. The rotor 500 also includes a plurality of permanent magnets 520, each of which is located in a magnet slot 514. In other words, the rotor 500 is a rotor with internal permanent magnets.

[0105] Optionally, the permanent magnet 520 is disposed on the outer peripheral wall of the rotor core.

[0106] The rotor 500 includes a second rotor core 530 and a plurality of permanent magnets 520, each of which is disposed on the outer peripheral wall of the second rotor core 530 and arranged at intervals along the circumference of the rotor 500. In other words, the rotor 500 is a surface-mounted permanent magnet rotor.

[0107] In some embodiments, optionally, as Figure 1 and Figure 5 As shown, the remanence Br (T) of the permanent magnet 520, the axial height T1 (mm) of the stator core 40, the outer diameter D2 (mm) and D1 (mm) of the stator core 40 satisfy: 12 (T·mm) ≤ T1×Br×D1 / D2 ≤ 13.5 (T·mm).

[0108] In this embodiment, the structure of the motor 50 is further defined.

[0109] The remanence of the permanent magnet 520 is denoted as Br (T), the axial height of the stator core 40 is denoted as T1 (mm), the outer diameter of the stator core 40 is denoted as D2 (mm), and the inner diameter of the stator core 40 is denoted as D1 (mm). The relationship among Br, T1, D2, and D1 satisfies 12 (T·mm) ≤ T1 × Br × D1 / D2 ≤ 13.5 (T·mm). This ensures that the magnetic energy generated by the rotor 500 during operation is distributed within the motor 50, avoiding oversaturated and undersaturated regions in the magnetic density design, and taking into account both copper and iron losses, thereby improving the operating efficiency of the motor 50.

[0110] In some embodiments, optionally, as Figure 1 、 Figure 2 and Figure 5 As shown, the maximum distance d (mm) from the bottom of the stator slot 300 to the center of the stator core 40, the remanence Br (T) of the permanent magnet 520, D1 (mm) and h (mm) satisfy: (2×d-D1)×Br / h≥4.5 (T).

[0111] In this embodiment, the structure of the motor 50 is further defined.

[0112] The relationship among d, Br, D1 and h satisfies (2×d-D1)×Br / h≥4.5(T).

[0113] This setting takes into account the magnetic density design and the overall size of the stator core 40, so that the magnetic density is evenly distributed, and takes into account the cost of the motor 50 and the electromagnetic performance of the motor 50. While ensuring that the motor 50 has a reasonable current density, it does not increase the manufacturing cost of the motor 50, maximizes the output torque and efficiency of the motor 50, and makes the motor 50 more cost-effective (e.g., cost-effectiveness refers to the ratio of efficiency to cost).

[0114] In some embodiments, optionally, the pole numbers P and Z of the motor 50 satisfy: Z / P=3 / 2, or Z / P=6 / 5.

[0115] In this embodiment, the structure of the motor 50 is further defined.

[0116] Specifically, the number P of poles of the motor 50 and the number Z of the stator slots 300 satisfy Z / P=3 / 2.

[0117] Specifically, the number P of poles of the motor 50 and the number Z of the stator slots 300 satisfy Z / P=6 / 5.

[0118] According to some further embodiments of the present application, a pump body includes: the motor 50 as in the above embodiment.

[0119] The pump body provided by the present invention includes the motor 50 as in the above embodiment, and therefore has all the beneficial effects of the above motor 50, which will not be described one by one here.

[0120] Optionally, the pump body comprises a water pump.

[0121] According to some further embodiments of the present application, a vehicle includes: the motor 50 as in the above embodiment; or the pump body as in the above embodiment.

[0122] The vehicle provided by the present invention includes the motor 50 as in the fourth aspect or the pump body as in the fifth aspect, and therefore has all the beneficial effects of the above-mentioned motor 50 or pump body, which will not be described one by one here.

[0123] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0124] The vehicle may also be a gasoline-powered vehicle.

[0125] Optionally, t / h=1.1, t / h=1.2, t / h=1.3 and t / h=1.4, etc., which are not listed here one by one.

[0126] Optionally, Z×t / (π×D1)=0.31, Z×t / (π×D1)=0.32, Z×t / (π×D1)=0.33, Z×t / (π×D1)=0.34 and Z×t / (π×D1)=0.35, etc., which are not listed here one by one.

[0127] Optionally, D1 / D2=0.46, D1 / D2=0.47, D1 / D2=0.48, D1 / D2=0.49, D1 / D2=0.5 and D1 / D2=0.51, etc., which are not listed here one by one.

[0128] Alternatively, T1×D1 / (D2) 2 =0.14, T1×D1 / (D2) 2 =0.15, T1×D1 / (D2) 2 =0.16, T1×D1 / (D2) 2 =0.17 and T1×D1 / (D2) 2 =0.18, etc., which are not listed here one by one.

[0129] Optionally, T1×Br×D1 / D2=12.2 (T·mm), T1×Br×D1 / D2=12.5 (T·mm), T1×Br×D1 / D2=12.8 (T·mm), T1×Br×D1 / D2=13 (T·mm) and T1×Br×D1 / D2=13.2 (T·mm), etc., which are not listed here one by one.

[0130] Optionally, the motor 50 includes a stator, and the stator includes a stator core 40. The outer diameter of the stator core 40 is recorded as D2, and the unit of D2 is mm. The inner diameter of the stator core 40 is recorded as D1, and the unit of D1 is mm.

[0131] D2 and D1 satisfy: 0.45≤D1 / D2≤0.52. The center of the stator core 40 is O1.

[0132] The stator core 40 includes a yoke 100 and multiple tooth portions 200. The tooth portion 200 includes a tooth body 210 and a tooth shoe 220. The tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The multiple tooth portions 200 are arranged at intervals along the circumference of the stator core 40. Any two adjacent tooth portions 200 and the yoke 100 enclose a stator slot 300.

[0133] The number of stator slots 300 is Z. The bottom of the stator slots 300 adopts a three-section structure. The maximum distance between the bottom of the stator slot 300 and the center O1 of the stator core 40 is d. The radial width of the yoke 100 in the stator core 40 is h, and h = D2 / 2-d. The circumferential width of the tooth body 210 in the stator core 40 is t. t, h, and D1 satisfy the following conditions: 1 ≤ t / h ≤ 1.5, and 0.3 ≤ Z × t / (π × D1) ≤ 0.36.

[0134] The axial height of the stator core 40 is T1 , and the unit of the axial height of the stator core 40 is mm.

[0135] The motor 50 includes a rotor 500, which includes a permanent magnet 520. The remanence of the permanent magnet 520 is Br, and the unit of the remanence of the permanent magnet 520 is T. T1, Br, D1, and D2 satisfy: 12 (T·mm) ≤ T1×Br×D1 / D2 ≤ 13.5 (T·mm).

[0136] T1, D1 and D2 satisfy: 0.13≤T1×D1 / (D2) 2 ≤0.19.

[0137] The maximum distance from the bottom of the stator slot to the center of the stator core is d. d, D1, Br and h satisfy: (2×d-D1)×Br / h≥4.5(T)

[0138] The number of poles P of the motor 50 and the number Z of the stator slots 300 satisfy: Z / P=3 / 2, or Z / P=6 / 5.

[0139] Optionally, the pump body is a water pump.

[0140] The original example is a water pump motor. Z = 6, P = 4, D2 = 64, with D2 in mm. D1 = 38.5, with D1 in mm. This solution uses a large split ratio design, with D1 / D2 = 0.602. h = 3, with h in mm. t = 6, with t in mm. Br = 1.4, with Br in T. The ratio of t to h is t / h = 2, Z × t / (π × D1) = 0.298, (2 × d - D1) × Br / h = 8.17 (T), and T1 × Br × D1 / D2 = 14.74 (T·mm). The original example uses a large split ratio, which increases the amount of permanent magnets while reducing the amount of copper. This results in a slightly higher stator saturation, thus limiting motor efficiency.

[0141] Figure 1 This is the first embodiment of the present application, D2=64, and the unit of D2 is mm. D1=32, and the unit of D1 is mm. D2 and D1 satisfy: 0.45≤D1 / D2≤0.52. Specifically, D1 / D2=0.5. The rotation center of the motor 50 (that is, the center of the stator core 40) is O1. The stator core 40 includes a yoke 100 and a plurality of teeth 200, and the tooth 200 includes a tooth body 210 and a tooth shoe 220. The tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The plurality of teeth 200 are arranged at intervals along the circumference of the stator core 40, and any two adjacent teeth 200 and the yoke 100 enclose a stator slot 300. The number of stator slots 300 Z=12.

[0142] like Figure 2As shown, the bottom of the stator slot 300 adopts a three-segment structure. The AB segment and the CD segment are both planar segments 112, and both segments AB and CD are connected to the circumferential end surface of the tooth portion 200. The BC segment is a circular arc segment. The maximum distance d from the center O1 of the stator core 40 (i.e., the center of the stator core 40) to the bottom of the stator slot 300 is 28, in mm. The radial width of the yoke 100 in the stator core 40 is h=4, in mm. Here, h=D2 / 2-d. The circumferential width of the tooth body 210 in the stator core 40 is t=6, and t, h, and D1 satisfy: 1≤t / h=1.5≤1.5, and 0.3≤Z×t / (π×D1)=0.358≤0.36. The stator thickness (i.e., the axial height of the stator core 40) is T1=17.5, in mm. The remanence Br of the permanent magnet 520 is 1.4, in T. T1, Br, and D1 satisfy: 12 (T·mm) ≤ T1×Br×D1 / D2 = 12.25 (T·mm) ≤ 13.5 (T·mm). T1, D2, and D1 satisfy: 0.13 ≤ T1×D1 / (D2) 2 =0.137≤0.19. D1, d, h, and Br satisfy: (2×d-D1)×Br / h≥4.5(T). The number of poles of the motor 50 is P, and Z / P=3 / 2. The rotor 500 adopts an embedded structure.

[0143] Figure 3 This is the second embodiment of the present application, D2=55, and the unit of D2 is mm. D1=25.5, and the unit of D1 is mm. D2 and D1 satisfy: 0.45≤D1 / D2=0.464≤0.52. The rotation center of the motor 50 is O1, and the stator core 40 includes a yoke 100 and a plurality of teeth 200. The teeth 200 include a tooth body 210 and a tooth shoe 220. The tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The plurality of teeth 200 are arranged at intervals along the circumference of the stator core 40, and any two adjacent teeth 200 and the yoke 100 enclose a stator slot 300. The number of stator slots 300 Z=12. The maximum distance d from the center O1 of the stator core 40 to the bottom of the stator slot 300 is 23.5, and the unit is mm. The width of the yoke 100 in the radial direction of the stator core 40 is h=4, in mm. h=D2 / 2-d. The width of the tooth body 210 in the circumferential direction of the stator core 40 is t=4.5, in mm. t, h, and D1 satisfy: 1≤t / h=1.125≤1.5, and 0.3≤Z×t / (π×D1)=0.337≤0.36. The thickness of the stator is T1=20, in mm. The remanence Br of the permanent magnet 520 is 1.4, in T. T1, Br, and D1 satisfy; 12 (T·mm)≤T1×Br×D1 / D2=12.98(T·mm)≤13.5(T·mm). T1, D2, and D1 satisfy: 0.13≤T1×D1 / (D2)2 =0.169≤0.19. D1, d, h, and Br satisfy: (2×d-D1)×Br / h=7.53(T)≥4.5(T). The number of poles of the motor 50 is P, and Z / P=3 / 2.

[0144] Figure 4 This is the third embodiment of the present application, D2=60, and the unit of D2 is mm. D1=30, and the unit of D1 is mm. D2 and D1 satisfy: 0.45≤D1 / D2=0.5≤0.52. The rotation center of the motor 50 is O1, and the stator core 40 includes a yoke 100 and a plurality of teeth 200. The teeth 200 include a tooth body 210 and a tooth shoe 220. The tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The plurality of teeth 200 are arranged at intervals along the circumference of the stator core 40, and any two adjacent teeth 200 and the yoke 100 enclose a stator slot 300. The number of stator slots 300 Z=12. The maximum distance d from the center O1 of the stator core 40 to the bottom of the stator slot 300 is 26, and the unit is mm. The width of the yoke 100 in the radial direction of the stator core 40 is h=4, in mm. h=D2 / 2-d. The width of the tooth body 210 in the circumferential direction of the stator core 40 is t=4.5, in mm. t, h, and D1 satisfy: 1≤t / h=1.125≤1.5, and 0.3≤Z×t / (π×D1)=0.382≤0.36. The thickness of the stator is T1=20, in mm. The remanence Br of the permanent magnet 520 is 1.4, in T. T1, Br, and D1 satisfy: 12 (T·mm)≤T1×Br×D1 / D2=13.3 (T·mm)≤13.5 (T·mm). T1, D2, and D1 satisfy: 0.13≤T1×D1 / (D2) 2 =0.158≤0.19. D1, d, h, and Br satisfy: (2×d-D1)×Br / h=7.7(T)≥4.5(T). The number of poles of the motor 50 is P, and Z / P=3 / 2.

[0145] Figure 5This is the fourth embodiment of the present application, D2=64, and the unit of D2 is mm. D1=32, and the unit of D1 is mm. D2 and D1 satisfy: 0.45≤D1 / D2=0.5≤0.52. The rotation center of the motor 50 is O1, and the stator core 40 includes a yoke 100 and a plurality of teeth 200. The teeth 200 include a tooth body 210 and a tooth shoe 220. The tooth body 210 is connected between the inner circumferential wall 110 of the yoke and the tooth shoe 220. The plurality of teeth 200 are arranged at intervals along the circumference of the stator core 40, and any two adjacent teeth 200 and the yoke 100 enclose a stator slot 300. The number of stator slots 300 is Z=12. The maximum distance d=28 from the center O1 of the stator core 40 to the bottom of the stator slot 300 is in mm. The width of the yoke 100 in the radial direction of the stator core 40 is h=4 in mm. h=D2 / 2-d. The width of the tooth body 210 in the circumferential direction of the stator core 40 is t=6, in mm. t, h and D1 satisfy: 1≤t / h=1.5≤1.5, and 0.3≤Z×t / (π×D1)=0.358≤0.36. The thickness of the stator is T1=17.5, in mm. The remanence Br of the permanent magnet 520 is Br=1.4, in T. T1, Br and D1 satisfy: 12(T·mm)≤T1×Br×D1 / D2=12.25(T·mm)≤13.5(T·mm). T1, D2 and D1 satisfy: 0.13≤T1×D1 / (D2) 2 =0.137≤0.19. D1, d, h, and Br satisfy: (2×d-D1)×Br / h≥4.5(T). The number of poles of motor 50 is P, and Z / P=3 / 2. Rotor 500 adopts a surface-mount structure.

[0146] Figure 6 A schematic diagram of the comparison curves of the cost performance, simulation efficiency and cost of the original example, Example 1 of the present application, Example 2 of the present application, Example 3 of the present application, Comparative Example 1 and Comparative Example 2 is shown.

[0147] From Table 1 and Figure 6 It can be seen that compared to the original example, the efficiency (i.e., simulated efficiency) of the motor 50 in Example 1 of the present application increased by 3%, the cost decreased by 18%, and the cost performance of the motor 50 increased by 13%. The cost performance of Example 1, Example 2, and Example 3 of the present application increased by 5% compared to Comparative Examples 1 and 2, which means that under the same power conditions, the efficiency of the motor 50 of the present application is higher. Among them, cost performance refers to the ratio of efficiency to cost.

[0148] Table 1

[0149]

[0150] In this application, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0151] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: The stator core comprises: a yoke, wherein the yoke is an annular structure; a plurality of teeth, each comprising a tooth body and a tooth shoe, wherein the tooth body is connected between the inner circumferential wall of the yoke and the tooth shoe, the plurality of teeth being arranged at intervals along the circumference of the stator core, and any two adjacent teeth and the yoke enclosing a stator slot; The inner peripheral wall of the yoke portion located between two adjacent tooth portions includes two planar segments and a connecting segment. Along the circumferential direction of the stator core, the connecting segment connects between the two planar segments. Each planar segment is connected to one tooth portion. The connecting segment includes at least one of an arcuate segment and a folded segment. The inner diameter of the stator core is denoted as D1, the number of the stator slots is denoted as Z, the circumferential width of the tooth body is denoted as t, and the radial width of the yoke is denoted as h; Where, t≥h, Z×t<π×D1.

2. The stator according to claim 1, characterized in that t, h, Z and D1 satisfy: 1≤t / h≤1.5,0.3≤Z×t / (π×D1)≤0.

36.

3. The stator according to claim 1 or 2, characterized in that: The outer diameter of the stator core is denoted as D2, wherein 0.45≤D1 / D2≤0.

52.

4. The stator according to claim 1 or 2, characterized in that: The maximum value of the distance from the plane segment to the center of the stator core is less than or equal to the minimum value of the distance from the connecting segment to the center of the stator core.

5. The stator according to claim 1 or 2, characterized in that: The axial height T1 of the stator core, the outer diameter D2 of the stator core and D1 satisfy: 0.13≤T1×D1 / (D2) 2 ≤0.

19.

6. A motor, characterized in that: include: A rotor, comprising a rotor core and permanent magnets, wherein the permanent magnets are arranged on the outer peripheral wall of the rotor core or placed in magnet slots provided in the rotor core; The stator according to any one of claims 1 to 5, wherein the rotor is located radially inside the stator, and the rotor is rotatable relative to the stator.

7. The motor according to claim 6, characterized in that The remanence Br (T) of the permanent magnet, the axial height T1 (mm) of the stator core, the outer diameter D2 (mm) and D1 (mm) of the stator core satisfy: 12 (T·mm)≤T1×Br×D1 / D2≤13.5 (T·mm).

8. The motor according to claim 6 or 7, characterized in that The maximum distance d (mm) from the bottom of the stator slot to the center of the stator core, the remanence Br (T) of the permanent magnet, D1 (mm) and h (mm) satisfy: (2×d-D1)×Br / h≥4.5 (T).

9. The motor according to claim 6 or 7, characterized in that The pole numbers P and Z of the motor satisfy: Z / P=3 / 2, or Z / P=6 / 5.

10. A pump body, characterized in that: include: A motor as claimed in any one of claims 6 to 9.

11. A vehicle, characterized in that: include: The motor according to any one of claims 6 to 9; or The pump body according to claim 10.

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