Rotor punching sheet, rotor, motor, pump body and vehicle

Abstract

The utility model provides a rotor punching sheet, a rotor, a motor, a pump body and a vehicle, the rotor punching sheet is used for the rotor, the rotor punching sheet comprises a punching sheet body, the punching sheet body is provided with a shaft hole and a plurality of magnet grooves, and the plurality of magnet grooves are arranged around the shaft hole at intervals; the punching sheet body is also provided with a plurality of guide structures, one guide structure is arranged between each magnet groove and the outer peripheral wall of the punching sheet body, and the guide structures comprise a first guide groove and a second guide groove; the punching sheet body is provided with a plurality of magnetic pole center lines, each guide structure is located at one magnetic pole center line, and the magnetic pole center lines are connecting lines of the center of the shaft hole and the centers of the magnet grooves. In the guide structure, the center line of the magnetic pole is located between the first guide groove and the second guide groove, and the first guide groove and the second guide groove both obliquely extend in the rotation direction of the rotor. The application adjusts the direction of the magnetic line of force, can improve the harmonic wave of the motor, reduces the torque pulsation and iron loss, and can improve the vibration noise of the motor.

Description

Technical Field

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

[0002] With the rapid development of the economy and the improvement of living standards, users are increasingly demanding high-efficiency, low-noise motors. Related technologies often suffer from high torque ripple, large iron losses, and high vibration and noise during operation, which seriously impact the user experience. Utility Model Content

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

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

[0005] A second aspect of the present application provides a rotor.

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

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

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

[0009] In view of this, the first aspect of the present application provides a rotor punching sheet for a rotor, the rotor punching sheet comprising: a punching sheet body, the punching sheet body being provided with an axial hole and a plurality of magnet slots, the plurality of magnet slots being arranged at intervals around the axial hole; the punching sheet body being further provided with a plurality of guide structures, a guide structure being provided between each magnet slot and the outer peripheral wall of the punching sheet body, the guide structure comprising a first guide groove and a second guide groove; the punching sheet body having a plurality of magnetic pole center lines, each guide structure being located at a magnetic pole center line, the magnetic pole center line being a line connecting the center of the axial hole and the center of the magnet slot; in the guide structure, the magnetic pole center line is located between the first guide groove and the second guide groove, and both the first guide groove and the second guide groove extend obliquely along the rotation direction of the rotor.

[0010] The present application provides a rotor punching sheet including a punching sheet body.

[0011] The punching sheet body is provided with an axial hole, a plurality of magnet slots and a plurality of guide structures.

[0012] A plurality of magnet slots are arranged at intervals around the shaft hole, and the magnet slots are used to install permanent magnets of the rotor to form magnetic poles.

[0013] A plurality of guide structures are arranged at intervals around the shaft hole.

[0014] A guide structure is arranged between each magnet slot and the outer peripheral wall of the punching sheet body.

[0015] The guide structure includes a first guide groove and a second guide groove. The punch body has multiple magnetic pole center lines, and each guide structure is located at a magnetic pole center line. Specifically, the magnetic pole center line is located between the first guide groove and the second guide groove.

[0016] The first guide groove and the second guide groove both extend obliquely along the rotation direction of the rotor. That is, the first guide groove extends obliquely along the rotation direction of the rotor, and the second guide groove extends obliquely along the rotation direction of the rotor. The first guide groove and the second guide groove extend in the same direction.

[0017] Taking the rotor rotating in the counterclockwise direction as an example, the first guide groove includes a first end and a second end. The first end and the second end are arranged relative to each other, with the first end being close to the shaft hole and the second end being away from the shaft hole. That is, the first end is closer to the shaft hole than the second end. The distance from the first end to the magnetic pole centerline is greater than the distance from the second end to the magnetic pole centerline. The second guide groove includes a third end and a fourth end, the third end and the fourth end are arranged relative to each other, with the third end being close to the shaft hole and the fourth end being away from the shaft hole. That is, the third end is closer to the shaft hole than the fourth end. The distance from the third end to the magnetic pole centerline is less than the distance from the fourth end to the magnetic pole centerline.

[0018] The present application rationally arranges the location and extension direction of the guide structure, so that the first guide groove and the second guide groove are located on either side of the magnetic pole centerline, and both the first guide groove and the second guide groove extend obliquely along the direction of rotation of the rotor. In other words, the first guide groove and the second guide groove are asymmetrically arranged along the corresponding magnetic pole centerline. This arrangement can specifically adjust the direction of the magnetic lines of force, improve the motor's harmonics, reduce torque pulsation and iron loss, improve the motor's vibration noise, and also achieve improved motor efficiency.

[0019] It can be understood that, on the axial end face of the punch body, the line connecting the center of the magnet slot and the center of the shaft hole is the magnetic pole center line, referred to as the "d" axis.

[0020] The rotor punching according to the present application may also have the following additional technical features:

[0021] In some embodiments, optionally, the guide structure includes a plurality of first guide grooves and a plurality of second guide grooves. Along the circumference of the punch body, the plurality of first guide grooves are arranged at intervals on one side of the magnetic pole center line, and the plurality of second guide grooves are arranged at intervals on the other side of the magnetic pole center line.

[0022] In this embodiment, a guide structure is further defined.

[0023] The guide structure includes a plurality of first guide grooves and a plurality of second guide grooves.

[0024] A plurality of first guide grooves are arranged at intervals along the circumference of the punch body. A plurality of second guide grooves are arranged at intervals along the circumference of the punch body.

[0025] In the guide structure, a plurality of first guide grooves are located on one side of the magnetic pole center line, and a plurality of second guide grooves are located on the other side of the magnetic pole center line.

[0026] A gap is defined between the first and second guide slots for magnetic flux to pass through. A gap is defined between two adjacent first guide slots for magnetic flux to pass through, and a gap is defined between two adjacent second guide slots for magnetic flux to pass through. The magnetic flux is corrected and adjusted within these gaps, allowing it to pass smoothly through the air gap. This stabilizes the magnetic force distribution along the outer edge of the rotor, improves motor harmonics, reduces torque ripple and iron loss, and reduces vibration and noise, while also increasing motor efficiency.

[0027] In some embodiments, optionally, in the guide structure, the number of the first guide grooves is equal to the number of the second guide grooves.

[0028] In this embodiment, the composition of the guide structure is further defined.

[0029] The guide structure includes a plurality of first guide grooves, and the guide structure includes a plurality of second guide grooves. In the guide structure, the number of the first guide grooves is equal to the number of the second guide grooves.

[0030] This setting can effectively adjust the direction of the magnetic lines of force, which is more conducive to the smooth distribution of the magnetic lines of force, avoiding the occurrence of disordered distribution of the magnetic lines of force, and is beneficial to improving the balance of the magnetic field layout of the motor, thereby reducing the torque pulsation during the operation of the motor and improving the vibration noise during the operation of the motor.

[0031] In some embodiments, optionally, the magnet slot extends tangentially along the circumference of the punch body; the magnet slot includes two magnetic isolation segments and a straight slot segment, and the straight slot segment is connected between the two magnetic isolation segments.

[0032] In this embodiment, the extending direction of the magnet slot is further defined.

[0033] Specifically, the magnet groove extends tangentially along the circumference of the punch body.

[0034] That is, the magnet slots are arranged in a straight line.

[0035] The extension direction of the magnet slots is combined with the composition of the guide structure to adjust the direction of the magnetic lines of force, which can improve the harmonics of the motor, reduce torque pulsation and iron loss, improve the vibration noise of the motor, and improve the efficiency of the motor.

[0036] The magnet slot comprises two magnetic isolation sections and a straight slot section. The straight slot section is located between the two magnetic isolation sections and is communicated with each magnetic isolation section.

[0037] It is understandable that permanent magnets are installed in the straight slot sections to form magnetic poles, while no permanent magnets are installed in the magnetic isolation sections, that is, the magnetic isolation sections are empty.

[0038] In some embodiments, optionally, the first part of the magnetic isolation section is located on the side of the straight slot section facing the guide structure; along the extension direction of the magnet slot, the second part of the magnetic isolation section is located between the straight slot section and the outer peripheral wall of the punch body.

[0039] In this embodiment, the matching structures of the magnet groove, the guide structure and the outer peripheral wall of the punch body are further defined.

[0040] The magnet grooves extend tangentially along the circumference of the punch body.

[0041] The magnetic isolation section has a first portion and a second portion. The first portion of the magnetic isolation section is located on the side of the straight slot section facing the guide structure. Along the extension direction of the magnet slot, the second portion of the magnetic isolation section is located between the straight slot section and the outer peripheral wall of the punch body.

[0042] By rationally setting the matching structure of the first part of the magnetic isolation section, the second part of the magnetic isolation section and the straight slot section, it is beneficial to improve the leakage magnetic phenomenon, improve the quality of the motor output torque, and thus enhance the motor performance.

[0043] In some embodiments, optionally, in the guide structure, along the magnetic pole center line to the end of the magnet slot, the distance between the slot walls of the first first guide slot and the first second guide slot where they are close to each other is recorded as L1, the distance between the slot walls of the second first guide slot and the second second guide slot where they are close to each other is recorded as L2, the distance from the outer peripheral wall of the punching sheet body to the center of the punching sheet body is recorded as Rr, the angle between the slot wall of either the first guide slot and the second guide slot facing the magnetic pole center line and the magnetic pole center line is recorded as θ, and the length of the straight slot section in the extension direction of the magnet slot is recorded as Lm; wherein, L2 / L1×sin(θ)×Lm / Rr<1.

[0044] In this embodiment, a guide structure is further defined.

[0045] Along the direction from the magnetic pole centerline to the end of the magnet slot, the first first guide groove and the first second guide groove are the first guide groove and the second guide groove arranged adjacent to the magnetic pole centerline. The first first guide groove is located between the magnetic pole centerline and the second first guide groove, and the first second guide groove is located between the magnetic pole centerline and the second second guide groove.

[0046] The distance between the adjacent groove walls of the first first guide groove and the first second guide groove is L1. The distance between the adjacent groove walls of the second first guide groove and the second second guide groove is L2. The distance between the outer peripheral wall of the punch body and the center of the punch body is Rr. The angle between the groove wall of the first guide groove facing the magnetic pole centerline and the magnetic pole centerline is θ, and the angle between the groove wall of the second guide groove facing the magnetic pole centerline and the magnetic pole centerline is θ. The length of the straight groove segment in the extension direction of the magnet slot is Lm.

[0047] The relationship between L2, L1, θ, Lm, and Rr is defined to satisfy: L2 / L1×sin(θ)×Lm / Rr<1. This setting defines the coordination structure of the two first guide slots, the two second guide slots, the punching plate body, and the magnet slot in the guide structure. While ensuring the structural strength of the rotor punching plate, it rationally arranges the positional relationship between the guide structure, the magnetic pole centerline, and the magnet slot to achieve the purpose of adjusting the direction of the magnetic lines of force, avoiding blocking the magnetic circuit, improving the motor's harmonics, reducing torque pulsation and iron loss, improving the motor's vibration noise, and also achieving improved motor efficiency.

[0048] Optionally, the inclined lengths of the plurality of first guide grooves gradually decrease along the direction from the magnetic pole centerline to the end of the magnet slot. This arrangement ensures that the plurality of first guide grooves are aligned with the outer peripheral wall of the punching body and the magnet slot. While effectively regulating the direction of the magnetic lines of force, it also takes into account the structural strength of the rotor punching, avoiding deformation due to the low structural strength of the rotor punching, which in turn leads to the rotor punching falling apart. This provides structural support for ensuring the structural strength and overall dimensions of the rotor.

[0049] Optionally, the inclined lengths of the plurality of second guide grooves gradually decrease along the direction from the magnetic pole centerline to the end of the magnet slot. This arrangement ensures that the plurality of second guide grooves are aligned with the outer peripheral wall of the punching body and the magnet slot, effectively regulating the direction of the magnetic lines of force while also taking into account the structural strength of the rotor punching, thereby avoiding deformation due to the low structural strength of the rotor punching, which in turn leads to the rotor punching falling apart, and providing structural support for ensuring the structural strength and overall dimensions of the rotor.

[0050] In some embodiments, optionally, L1, L2, Lm, θ, and Rr satisfy: 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0051] In this embodiment, the distance L1 between the groove walls of the first first guide groove and the first second guide groove, the distance L2 between the groove walls of the second first guide groove and the second second guide groove, the distance Rr from the outer peripheral wall of the punching body to the center of the punching body, the angle θ between the groove wall of the first guide groove facing the center line of the magnetic pole and the center line of the magnetic pole, and the extension length Lm of the magnet groove are further defined to satisfy: 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0052] When L1, L2, Lm, θ and Rr are within the range of the above formula, the improvement effect on the motor harmonics is better, which can effectively reduce torque pulsation and iron loss, effectively improve the vibration noise of the motor, and effectively improve the efficiency of the motor.

[0053] In some embodiments, optionally, θ satisfies: 5°≤θ≤30°.

[0054] In this embodiment, the angle θ between the first guide groove wall facing the magnetic pole centerline and the magnetic pole centerline is further limited to a range of 5°≤θ≤30°. This setting defines the positional relationship between the first guide groove and the magnetic pole centerline, specifically, the inclination angle of the first guide groove. This setting can cooperate with the permanent magnets in the magnet slot to optimize the direction of the magnetic lines of force.

[0055] If θ is less than 5°, the area of the punch body for providing the first guide groove is too small to ensure the inclination dimension of the first guide groove, which will weaken the effect of adjusting the direction of the magnetic lines of force.

[0056] If θ>30°, the magnetic circuit will be blocked, and over-saturation and under-saturation areas will easily appear, which will affect the performance of the motor.

[0057] In some embodiments, optionally, in the guide structure, along the magnetic pole center line to the end of the magnet slot, the distance from the middle of the slot wall of the first first guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L11, the distance from the middle of the slot wall of the first second guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L12, the distance from the middle of the slot wall of the second first guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L21, and the distance from the middle of the slot wall of the second second guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L22; wherein, L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

[0058] In this embodiment, the positional relationship between the guide structure and the magnetic pole centerline is further defined.

[0059] Along the direction from the magnetic pole centerline to the end of the magnet slot, the first first guide groove and the first second guide groove are the first guide groove and the second guide groove arranged adjacent to the magnetic pole centerline. The first first guide groove is located between the magnetic pole centerline and the second first guide groove, and the first second guide groove is located between the magnetic pole centerline and the second second guide groove.

[0060] The distance from the middle of the groove wall of the first first guide groove facing the magnetic pole centerline to the magnetic pole centerline is L11. The distance from the middle of the groove wall of the first second guide groove facing the magnetic pole centerline to the magnetic pole centerline is L12. The distance from the middle of the groove wall of the second first guide groove facing the magnetic pole centerline to the magnetic pole centerline is L21. The distance from the middle of the groove wall of the second second guide groove facing the magnetic pole centerline to the magnetic pole centerline is L22.

[0061] And the relationship between L11, L12, L21 and L22 is limited to satisfy: L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

[0062] This setting limits the coordination structure of the two first guide grooves, the two second guide grooves and the magnetic pole center line. While ensuring the structural strength of the rotor punching, it rationally arranges the positional relationship between the guide structure, the magnetic pole center line and the magnet slot to achieve the purpose of adjusting the direction of the magnetic lines of force, avoiding blocking the magnetic circuit, improving the harmonics of the motor, reducing torque pulsation and iron loss, improving the vibration noise of the motor, and also improving the efficiency of the motor.

[0063] A second aspect of the present application provides a rotor, including a rotor core. The rotor core includes a plurality of rotor punchings as described in the first aspect, and the plurality of rotor punchings are stacked.

[0064] The rotor provided in the present application includes a rotor core. Since the rotor core includes the rotor punchings as in the first aspect, it has all the beneficial effects of the above-mentioned rotor punchings, which will not be described one by one here.

[0065] A third aspect of the present application provides a motor, comprising: a stator; and the rotor of the second aspect, wherein the stator is disposed around the rotor, and the rotor is capable of rotating relative to the stator.

[0066] The motor provided in the present application includes a stator and the rotor in the second aspect. Since the motor includes the rotor in the second aspect, it has all the beneficial effects of the above-mentioned rotor, which will not be described one by one here.

[0067] Optionally, the motor is a motor with an outer stator and an inner rotor.

[0068] In some embodiments, optionally, the inner diameter of the stator is recorded as Dsin, and the outer diameter of the stator is recorded as Dsout, wherein 0.49≤Dsin / Dsout≤0.53.

[0069] In this embodiment, the structure of the stator is further defined.

[0070] Specifically, the inner diameter of the stator is Dsin, the outer diameter of the stator is Dsout, and Dsin and Dsout satisfy 0.49≤Dsin / Dsout≤0.53.

[0071] 0.49≤Dsin / Dsout≤0.53, and 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25. This setting can ensure the rotor inertia and take into account the electromagnetic performance of the motor.

[0072] The fourth aspect of the present application proposes a pump body, comprising: the motor as in the third aspect.

[0073] The pump body provided in the present application includes the motor as in the third aspect, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0074] A fifth aspect of the present application provides a vehicle, comprising: a motor as in the third aspect; or a pump body as in the fourth aspect.

[0075] The vehicle provided in this application includes the motor as in the third aspect or the pump body as in the fourth aspect, and therefore has all the beneficial effects of the above-mentioned motor or pump body, which will not be stated one by one here.

[0076] 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.

[0077] The vehicle may also be a gasoline-powered vehicle.

[0078] 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

[0079] 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:

[0080] Figure 1 A partial structural schematic diagram of a rotor according to a first embodiment of the present application is shown;

[0081] Figure 2 A partial structural schematic diagram of a rotor according to a second embodiment of the present application is shown;

[0082] Figure 3 A partial structural schematic diagram of a motor according to an embodiment of the present application is shown;

[0083] Figure 4 A schematic diagram comparing the torque fluctuations of the motors of the comparative example and the present application is shown.

[0084] in, Figures 1 to 3 The corresponding relationship between the reference numerals and component names is as follows:

[0085] 10 rotor punching sheet, 100 punching sheet body, 200 shaft hole, 300 magnet slot, 310 magnetic isolation section, 312 first part of the magnetic isolation section, 314 second part of the magnetic isolation section, 320 straight slot section, 400 guide structure, 410 first guide slot, 412 first end, 414 second end, 420 second guide slot, 422 third end, 424 fourth end, 500 magnetic pole center line, 60 rotor core, 70 rotor, 700 permanent magnet, 80 motor, 800 stator. DETAILED DESCRIPTION

[0086] 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.

[0087] 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.

[0088] Refer to the following Figures 1 to 4 A rotor sheet 10 , a rotor 70 , a motor 80 , a pump body, and a vehicle according to some embodiments of the present application.

[0089] like Figure 1 As shown, according to some embodiments of the present application, a rotor punching sheet 10 is used for a rotor, and the rotor punching sheet 10 includes: a punching sheet body 100, the punching sheet body 100 is provided with an axial hole 200 and a plurality of magnet slots 300, and the plurality of magnet slots 300 are arranged at intervals around the axial hole 200; the punching sheet body 100 is also provided with a plurality of guide structures 400, and a guide structure 400 is provided between each magnet slot 300 and the outer peripheral wall of the punching sheet body 100, and the guide structure 400 includes a first guide slot 410 and a second guide slot 420; the punching sheet body 100 has a plurality of magnetic pole center lines 500, and each guide structure 400 is located at a magnetic pole center line 500, and the magnetic pole center line 500 is a line connecting the center of the axial hole 200 and the center of the magnet slot 300; in the guide structure 400, the magnetic pole center line 500 is located between the first guide slot 410 and the second guide slot 420, and the first guide slot 410 and the second guide slot 420 both extend obliquely along the rotation direction of the rotor.

[0090] The present application provides a rotor punching sheet 10 , which includes a punching sheet body 100 .

[0091] The punch body 100 is provided with an axial hole 200 , a plurality of magnet slots 300 and a plurality of guide structures 400 .

[0092] A plurality of magnet slots 300 are arranged at intervals around the shaft hole 200 , and the magnet slots 300 are used to mount the permanent magnets 700 of the rotor 70 to form magnetic poles.

[0093] A plurality of guide structures 400 are arranged at intervals around the shaft hole 200 .

[0094] A guide structure 400 is arranged between each magnet slot 300 and the outer peripheral wall of the punch body 100 .

[0095] The guide structure 400 includes a first guide groove 410 and a second guide groove 420. The punch body 100 has a plurality of magnetic pole center lines 500, and each guide structure 400 is located at a magnetic pole center line 500. Specifically, the magnetic pole center line 500 is located between the first guide groove 410 and the second guide groove 420.

[0096] The first guide groove 410 and the second guide groove 420 both extend obliquely along the rotation direction of the rotor 70. That is, the first guide groove 410 extends obliquely along the rotation direction of the rotor 70, and the second guide groove 420 extends obliquely along the rotation direction of the rotor 70. The first guide groove 410 and the second guide groove 420 extend in the same direction.

[0097] Taking the rotor 70 as an example, rotating counterclockwise, the first guide slot 410 includes a first end 412 and a second end 414. The first end 412 and the second end 414 are disposed opposite each other, with the first end 412 being closer to the shaft hole 200 and the second end 414 being further away from the shaft hole 200. That is, the first end 412 is closer to the shaft hole 200 than the second end 414. The distance from the first end 412 to the magnetic pole centerline 500 is greater than the distance from the second end 414 to the magnetic pole centerline 500. The second guide slot 420 includes a third end 422 and a fourth end 424. The third end 422 and the fourth end 424 are disposed opposite each other, with the third end 422 being closer to the shaft hole 200 and the fourth end 424 being further away from the shaft hole 200. That is, the third end 422 is closer to the shaft hole 200 than the fourth end 424. The distance from the third end 422 to the magnetic pole centerline 500 is less than the distance from the fourth end 424 to the magnetic pole centerline 500.

[0098] The present application rationally arranges the position and extension direction of the guide structure 400, so that the first guide groove 410 and the second guide groove 420 are located on either side of the magnetic pole centerline 500, and both the first guide groove 410 and the second guide groove 420 extend obliquely along the rotation direction of the rotor 70. That is, the first guide groove 410 and the second guide groove 420 are asymmetrically arranged along the corresponding magnetic pole centerline 500. This arrangement can specifically adjust the direction of the magnetic lines of force, improve the harmonics of the motor 80, reduce torque pulsation and iron loss, improve the vibration noise of the motor 80, and also improve the efficiency of the motor 80.

[0099] It is understandable that, on the axial end face of the punch body 100 , the line connecting the center of the magnet slot 300 and the center of the shaft hole 200 is the magnetic pole center line 500 , referred to as the “d” axis.

[0100] Optionally, the first guide groove 410 includes at least one of a strip-shaped groove and an arc-shaped groove.

[0101] Optionally, the second guide groove 420 includes at least one of a strip-shaped groove and an arc-shaped groove.

[0102] In some embodiments, optionally, as Figure 1 As shown, the guide structure 400 includes a plurality of first guide grooves 410 and a plurality of second guide grooves 420 .

[0103] Along the circumference of the punch body 100 , a plurality of first guide grooves 410 are arranged at intervals on one side of the magnetic pole center line 500 .

[0104] Along the circumference of the punch body 100 , a plurality of second guide grooves 420 are arranged at intervals on the other side of the magnetic pole center line 500 .

[0105] In this embodiment, a guide structure 400 is further defined.

[0106] The guide structure 400 includes a plurality of first guide grooves 410 and a plurality of second guide grooves 420 .

[0107] A plurality of first guide grooves 410 are arranged at intervals along the circumference of the punch body 100. A plurality of second guide grooves 420 are arranged at intervals along the circumference of the punch body 100.

[0108] In the guide structure 400 , the plurality of first guide slots 410 are located on one side of the magnetic pole center line 500 , and the plurality of second guide slots 420 are located on the other side of the magnetic pole center line 500 .

[0109] A gap is defined between the first guide slot 410 and the second guide slot 420 for magnetic lines of force to pass through. A gap is defined between two adjacent first guide slots 410 for magnetic lines of force to pass through, and a gap is defined between two adjacent second guide slots 420 for magnetic lines of force to pass through. The magnetic lines of force are corrected and adjusted within these gaps, allowing them to pass smoothly through the air gap. This stabilizes the magnetic force distribution along the outer edge of the rotor 70, improves harmonics in the motor 80, reduces torque ripple and iron loss, reduces vibration and noise in the motor 80, and improves the efficiency of the motor 80.

[0110] Optionally, at least some of the plurality of first guide grooves 410 are arranged in parallel. For example, if there are three first guide grooves 410, any two of the first guide grooves 410 are arranged in parallel, or two of the three first guide grooves 410 are arranged in parallel.

[0111] Optionally, at least some of the plurality of second guide grooves 420 are arranged in parallel. For example, if there are three second guide grooves 420, any two of the second guide grooves 420 are arranged in parallel, or two of the three second guide grooves 420 are arranged in parallel.

[0112] Optionally, any two first guide grooves 410 among the plurality of first guide grooves 410 are not arranged in parallel.

[0113] Optionally, any two second guide grooves 420 among the plurality of second guide grooves 420 are not arranged in parallel.

[0114] in, Figure 3 The arrow in shows the direction of rotation of the rotor 70.

[0115] In some embodiments, optionally, in the guide structure 400 , the number of the first guide grooves 410 is equal to the number of the second guide grooves 420 .

[0116] In this embodiment, the composition of the guide structure 400 is further defined.

[0117] The guide structure 400 includes a plurality of first guide grooves 410 , and the guide structure 400 includes a plurality of second guide grooves 420 . In the guide structure 400 , the number of the first guide grooves 410 is equal to the number of the second guide grooves 420 .

[0118] This setting can effectively adjust the direction of the magnetic lines of force, which is more conducive to the smooth distribution of the magnetic lines of force, avoiding the occurrence of disordered distribution of the magnetic lines of force, and is beneficial to improving the balance of the magnetic field layout of the motor 80, thereby reducing the torque pulsation during the operation of the motor 80 and improving the vibration noise during the operation of the motor 80.

[0119] Optionally, the number of the first guide grooves 410 includes 2, 3, 4 or 5, etc., which are not listed here one by one.

[0120] Optionally, the number of the second guide grooves 420 includes 2, 3, 4 or 5, etc., which are not listed here one by one.

[0121] In some embodiments, the magnet slots 300 optionally extend tangentially along the circumference of the punch body 100 .

[0122] In this embodiment, the extending direction of the magnet slot 300 is further defined.

[0123] Specifically, the magnet slots 300 extend tangentially along the circumference of the punch body 100 .

[0124] That is, the magnet slots 300 are arranged in a straight line.

[0125] The extension direction of the magnet slot 300 is combined with the composition of the guide structure 400 to adjust the direction of the magnetic lines of force, which can improve the harmonics of the motor 80, reduce torque pulsation and iron loss, improve the vibration noise of the motor 80, and also improve the efficiency of the motor 80.

[0126] In some embodiments, optionally, as Figure 1 As shown, in the guide structure 400, along the magnetic pole center line 500 to the end of the magnet slot 300, the distance between the slot walls of the first first guide slot 410 and the first second guide slot 420 that are close to each other is recorded as L1, and the distance between the slot walls of the second first guide slot 410 and the second second guide slot 420 that are close to each other is recorded as L2.

[0127] The distance from the outer peripheral wall of the punch body 100 to the center of the punch body 100 is denoted as Rr.

[0128] The angle between the groove wall of the first guide groove 410 facing the magnetic pole center line and the magnetic pole center line 500 is denoted as θ.

[0129] The length of the straight slot section 320 in the extending direction of the magnet slot 300 is denoted as Lm.

[0130] Among them, L2 / L1×sin(θ)×Lm / Rr<1.

[0131] In this embodiment, a guide structure 400 is further defined.

[0132] Along the direction from the magnetic pole centerline 500 to the end of the magnet slot 300, the first first guide slot 410 and the first second guide slot 420 are the first guide slot 410 and the second guide slot 420 disposed adjacent to the magnetic pole centerline 500. The first first guide slot 410 is located between the magnetic pole centerline 500 and the second first guide slot 410, and the first second guide slot 420 is located between the magnetic pole centerline 500 and the second second guide slot 420.

[0133] The distance between the adjacent groove walls of the first first guide groove 410 and the first second guide groove 420 is L1. The distance between the adjacent groove walls of the second first guide groove 410 and the second second guide groove 420 is L2. The distance between the outer peripheral wall of the punch body 100 and the center of the punch body 100 is Rr. The angle between the groove wall of the first guide groove 410 facing the magnetic pole centerline and the magnetic pole centerline 500 is θ. The length of the straight groove segment 320 in the extension direction of the magnet slot 300 is Lm.

[0134] The relationship among L2, L1, θ, Lm, and Rr is defined to satisfy the following: L2 / L1×sin(θ)×Lm / Rr<1. This configuration defines the matching structure of the two first guide slots 410, the two second guide slots 420, the sheet body 100, and the magnet slot 300 in the guide structure 400. While ensuring the structural strength of the rotor sheet 10, it rationally arranges the positional relationship between the guide structure 400, the magnetic pole centerline 500, and the magnet slot 300 to achieve the purpose of adjusting the direction of the magnetic lines of force, avoiding blocking the magnetic path, improving the harmonics of the motor 80, reducing torque pulsation and iron loss, improving the vibration noise of the motor 80, and improving the efficiency of the motor 80.

[0135] Optionally, the inclined lengths of the plurality of first guide grooves 410 gradually decrease along the direction from the magnetic pole centerline 500 to the end of the magnet slot 300. This arrangement ensures that the plurality of first guide grooves 410 are dimensionally compatible with the outer peripheral wall of the sheet body 100 and the magnet slot 300. While effectively regulating the direction of the magnetic lines of force, it also takes into account the structural strength of the rotor sheet 10, avoiding deformation due to the low structural strength of the rotor sheet 10, which could lead to the rotor sheet 10 falling apart. This provides structural support for ensuring the structural strength and overall dimensions of the rotor 70.

[0136] Optionally, the inclined lengths of the plurality of second guide grooves 420 gradually decrease along the direction from the magnetic pole centerline 500 to the end of the magnet slot 300. This arrangement can ensure that the plurality of second guide grooves 420 are dimensionally compatible with the outer peripheral wall of the sheet body 100 and the magnet slot 300, effectively regulating the direction of the magnetic lines of force while also taking into account the structural strength of the rotor sheet 10, thereby preventing deformation of the rotor sheet 10 due to its low structural strength, which could lead to the rotor sheet 10 falling apart. This provides structural support for ensuring the structural strength and overall dimensions of the rotor 70.

[0137] In some embodiments, optionally, L1, L2, Lm, θ, and Rr satisfy: 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0138] In this embodiment, the distance L1 between the groove walls of the first first guide groove 410 and the first second guide groove 420, the distance L2 between the groove walls of the second first guide groove 410 and the second second guide groove 420, the distance Rr from the outer peripheral wall of the punching body 100 to the center of the punching body 100, the angle θ between the groove wall of the first guide groove 410 facing the magnetic pole center line and the magnetic pole center line 500, and the extension length Lm of the magnet slot 300 are further defined to satisfy: 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0139] When L1, L2, Lm, θ and Rr are within the range of the above formula, the improvement effect on the harmonics of the motor 80 is better, which can effectively reduce the torque pulsation and iron loss, effectively improve the vibration noise of the motor 80, and effectively improve the efficiency of the motor 80.

[0140] Optionally, L2 / L1×sin(θ)×Lm / Rr=0.12, L2 / L1×sin(θ)×Lm / Rr=0.14, L2 / L1×sin(θ)×Lm / Rr=0.16, L2 / L1×sin(θ)×Lm / Rr=0.18, L2 / L1×sin(θ)×Lm / Rr=0.2, L2 / L1×sin(θ)×Lm / Rr=0.22 and L2 / L1×sin(θ)×Lm / Rr=0.24, etc., which are not listed here one by one.

[0141] In some embodiments, optionally, θ satisfies: 5°≤θ≤30°.

[0142] In this embodiment, the angle θ between the slot wall of the first guide slot 410 facing the magnetic pole centerline and the magnetic pole centerline 500 is further limited to a range of values, where 5°≤θ≤30°. This setting defines the positional relationship between the first guide slot 410 and the magnetic pole centerline 500, specifically, the inclination angle of the first guide slot 410. This setting can cooperate with the permanent magnet 700 in the magnet slot 300 to optimize the direction of the magnetic lines of force.

[0143] If θ is less than 5°, the area of the punch body 100 for providing the first guide groove 410 is too small to ensure the tilting dimension of the first guide groove 410 , which will weaken the effect of adjusting the direction of the magnetic lines of force.

[0144] If θ>30°, the magnetic circuit will be blocked, and over-saturation and under-saturation regions will easily appear, which will affect the performance of the motor 80.

[0145] Optionally, θ=8°, θ=10°, θ=12°, θ=15°, θ=18°, θ=20°, θ=23°, θ=25° and θ=27°, etc., which are not listed here one by one.

[0146] In some embodiments, optionally, as Figure 1 As shown, in the guide structure 400, along the magnetic pole center line 500 to the end of the magnet slot 300, the distance from the middle of the slot wall of the first first guide slot 410 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L11, the distance from the middle of the slot wall of the first second guide slot 420 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L12, the distance from the middle of the slot wall of the second first guide slot 410 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L21, and the distance from the middle of the slot wall of the second second guide slot 420 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L22.

[0147] Among them, L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

[0148] In this embodiment, the positional relationship between the guide structure 400 and the magnetic pole center line 500 is further defined.

[0149] Along the direction from the magnetic pole centerline 500 to the end of the magnet slot 300, the first first guide slot 410 and the first second guide slot 420 are the first guide slot 410 and the second guide slot 420 disposed adjacent to the magnetic pole centerline 500. The first first guide slot 410 is located between the magnetic pole centerline 500 and the second first guide slot 410, and the first second guide slot 420 is located between the magnetic pole centerline 500 and the second second guide slot 420.

[0150] The distance between the middle of the groove wall of the first first guide groove 410 facing the magnetic pole centerline 500 and the magnetic pole centerline 500 is L11. The distance between the middle of the groove wall of the first second guide groove 420 facing the magnetic pole centerline 500 and the magnetic pole centerline 500 is L12. The distance between the middle of the groove wall of the second first guide groove 410 facing the magnetic pole centerline 500 and the magnetic pole centerline 500 is L21. The distance between the middle of the groove wall of the second second guide groove 420 facing the magnetic pole centerline 500 and the magnetic pole centerline 500 is L22.

[0151] And the relationship between L11, L12, L21 and L22 is limited to satisfy: L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

[0152] This setting limits the matching structure of the two first guide grooves 410, the two second guide grooves 420 and the magnetic pole center line 500. While ensuring the structural strength of the rotor punching 10, it rationally arranges the positional relationship between the guide structure 400, the magnetic pole center line 500 and the magnet slot 300 to achieve the purpose of adjusting the direction of the magnetic lines of force, avoid blocking the magnetic circuit, improve the harmonics of the motor 80, reduce torque pulsation and iron loss, improve the vibration noise of the motor 80, and also achieve the improvement of the efficiency of the motor 80.

[0153] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the magnet slot 300 includes two magnetic isolation sections 310 and a straight slot section 320 .

[0154] The straight slot section 320 is connected between the two magnetic isolation sections 310 .

[0155] The first portion 312 of the magnetic isolation section is located on a side of the straight slot section 320 facing the guide structure 400 .

[0156] Along the extension direction of the magnet slot 300 , the second portion 314 of the magnetic isolation segment is located between the straight slot segment 320 and the outer peripheral wall of the punch body 100 .

[0157] In this embodiment, the matching structures of the magnet slot 300 , the guide structure 400 and the outer peripheral wall of the punch body 100 are further defined.

[0158] The magnet groove 300 extends tangentially along the circumference of the punch body 100 .

[0159] The magnet slot 300 includes two magnetic isolation sections 310 and a straight slot section 320 . The straight slot section 320 is located between the two magnetic isolation sections 310 and is in communication with each magnetic isolation section 310 .

[0160] It is understood that the permanent magnet 700 is installed in the straight slot section 320 to form a magnetic pole. No permanent magnet 700 is installed in the magnetic isolation section 310, that is, the magnetic isolation section 310 is empty.

[0161] The magnetic isolation section 310 has a first portion and a second portion. The first portion 312 of the magnetic isolation section is located on the side of the straight slot section 320 facing the guide structure 400. Along the extension direction of the magnet slot 300, the second portion 314 of the magnetic isolation section is located between the straight slot section 320 and the outer peripheral wall of the punch body 100.

[0162] By rationally setting the matching structure of the first part 312 of the magnetic isolation section, the second part 314 of the magnetic isolation section and the straight slot section 320, it is beneficial to improve the leakage magnetic phenomenon, improve the quality of the output torque of the motor 80, and thus enhance the performance of the motor 80.

[0163] like Figure 2 As shown, according to some other embodiments of the present application, a rotor core 60 is provided. The rotor core 60 includes a plurality of rotor punchings 10 according to any of the above embodiments, and the plurality of rotor punchings 10 are stacked.

[0164] The rotor core 60 provided in the present application includes the rotor punchings 10 in any of the above embodiments, and therefore has all the beneficial effects of the above rotor punchings 10, which will not be described one by one here.

[0165] like Figure 1 and Figure 2 As shown, a rotor 70 according to some further embodiments of the present application includes: the rotor core 60 in the above embodiment.

[0166] The rotor 70 provided in the present application includes the rotor core 60 as in the above embodiment, and therefore has all the beneficial effects of the above rotor core 60 , which will not be described one by one here.

[0167] like Figure 3 As shown, a motor 80 according to some further embodiments of the present application includes: a stator 800; and the rotor 70 in the above embodiment, the stator 800 is arranged around the rotor 70, and the rotor 70 can rotate relative to the stator 800.

[0168] The motor 80 provided in the present application includes a stator 800 and the rotor 70 in the above embodiment. Since the motor 80 includes the rotor 70 in the above embodiment, it has all the beneficial effects of the above rotor 70, which are not described one by one here.

[0169] Optionally, the motor 80 is a motor with an outer stator 800 and an inner rotor 70 .

[0170] In some embodiments, optionally, as Figure 3 As shown, the inner diameter of the stator 800 is denoted as Dsin.

[0171] The outer diameter of the stator 800 is denoted as Dsout.

[0172] Among them, 0.49≤Dsin / Dsout≤0.53.

[0173] In this embodiment, the structure of the stator 800 is further defined.

[0174] Specifically, the inner diameter of the stator 800 is Dsin, and the outer diameter of the stator 800 is Dsout. Dsin and Dsout satisfy 0.49≤Dsin / Dsout≤0.53.

[0175] 0.49≤Dsin / Dsout≤0.53, and 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25. This setting can ensure the inertia of the rotor 70 while taking into account the electromagnetic performance of the motor 80.

[0176] Optionally, Dsin / Dsout=0.5, Dsin / Dsout=0.51, and Dsin / Dsout=0.52, etc., which are not listed here one by one.

[0177] According to some further embodiments of the present application, a pump body includes: a motor 80 as in any of the above embodiments.

[0178] The pump body provided in the present application includes the motor 80 as in any of the above embodiments, and therefore has all the beneficial effects of the above motor 80, which will not be described one by one here.

[0179] According to some further embodiments of the present application, a vehicle includes: the motor 80 as in the above embodiment; or the pump body as in the above embodiment.

[0180] The vehicle provided in the present application includes the motor 80 as in the above embodiment or the pump body as in the above embodiment, and therefore has all the beneficial effects of the above motor 80 or pump body, which will not be described one by one here.

[0181] 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.

[0182] The vehicle may also be a gasoline-powered vehicle.

[0183] Optionally, the motor 80 of the present application includes a stator 800 and a rotor 70. The stator 800 is located outside the rotor 70. The rotor 70 includes a plurality of permanent magnets 700 and a rotor core 60. The rotor core 60 includes a plurality of rotor punchings 10, and the plurality of rotor punchings 10 are stacked. The rotor punchings 10 include a punching body 100, which is provided with an axial hole 200, a plurality of magnet slots 300 and a plurality of guide structures 400, and the plurality of magnet slots 300 are arranged at intervals around the axial hole 200. The magnet slots 300 of the plurality of rotor punchings 10 penetrate the axial direction of the rotor 70 to form a plurality of magnetic steel slots, and a permanent magnet 700 is provided in each magnetic steel slot.

[0184] A guide structure 400 is provided between each magnet slot 300 and the outer peripheral wall of the punching body 100. The guide structure 400 includes a first guide slot 410 and a second guide slot 420. In the guide structure 400, the magnetic pole centerline 500 is located between the first guide slot 410 and the second guide slot 420. The first guide slot 410 and the second guide slot 420 are arranged to be inclined in the same direction, and the first guide slot 410 and the second guide slot 420 are distributed in an asymmetric structure. The present application reasonably arranges the structure of the rotor punching 10, which can further improve harmonics, reduce torque pulsation, reduce iron loss, and improve the efficiency of the motor 80.

[0185] The magnet slot 300 of the rotor punching 10 is in the shape of an "I". The magnet slot 300 includes two magnetic isolation sections 310 and a straight slot section 320. The straight slot section 320 is connected between the two magnetic isolation sections 310. A first guide slot 410 and a second guide slot 420 are provided above the magnet slot 300. The first guide slot 410 and the second guide slot 420 are both inclined in one direction. When the rotor 70 rotates counterclockwise, the first guide slot 410 and the second guide slot 420 are both inclined and extend in the counterclockwise direction. When the rotor 70 rotates clockwise, the first guide slot 410 and the second guide slot 420 are both inclined and extend in the clockwise direction. The first guide slot 410 and the second guide slot 420 are asymmetrically distributed with respect to the magnetic pole centerline 500.

[0186] in, Figure 3 The arrow in the figure indicates the direction of rotation of the rotor.

[0187] The first guide groove 410 closest to the magnetic pole centerline 500 is referred to as the first first guide groove 410. The second guide groove 420 closest to the magnetic pole centerline 500 is referred to as the first second guide groove 420. The first first guide groove 410 is located between the magnetic pole centerline 500 and the second first guide groove 410, while the first second guide groove 420 is located between the magnetic pole centerline 500 and the second second guide groove 420. The distance between the groove walls of the first first guide groove 410 and the first second guide groove 420 where they are close to each other is denoted as L1, and the distance between the groove walls of the second first guide groove 410 and the second second guide groove 420 where they are close to each other is denoted as L2. The angle between the groove wall of the first guide groove 410 facing the magnetic pole centerline and the magnetic pole centerline 500 is denoted as θ, the distance from the outer peripheral wall of the punch body 100 to the center of the punch body 100 is denoted as Rr, and the length of the straight groove segment 320 in the direction in which the magnet slot 300 extends is denoted as Lm. Among them, 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0188] Optionally, 5°≤θ≤30°.

[0189] Optionally, in the guide structure 400, along the magnetic pole center line 500 to the end of the magnet slot 300, the distance from the middle of the slot wall of the first first guide slot 410 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L11, the distance from the middle of the slot wall of the first second guide slot 420 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L12, the distance from the middle of the slot wall of the second first guide slot 410 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L21, and the distance from the middle of the slot wall of the second second guide slot 420 facing the magnetic pole center line 500 to the magnetic pole center line 500 is recorded as L22; wherein, L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

[0190] Optionally, to ensure the inertia of the rotor 70 and take into account the electromagnetic performance of the motor 80 , the inner diameter Dsin of the stator 800 and the outer diameter Dsout of the stator 800 satisfy 0.49≤Dsin / Dsout≤0.53.

[0191] Optionally, the rotor punching 10 is cross-sectioned along an axial direction perpendicular to the rotor punching 10 , and in the cross-section, the contour line of the first guide groove 410 includes at least one of a curved segment and a straight segment.

[0192] Optionally, the rotor punching 10 is cross-sectioned along an axial direction perpendicular to the rotor punching 10 , and in the cross-section, the contour line of the second guide groove 420 includes at least one of a curved segment and a straight segment.

[0193] The present application rationally arranges the structure of the motor 80, which can effectively improve the harmonic content, thereby reducing torque pulsation, and also reduce iron loss and thus improve efficiency.

[0194] In the comparative example, the guide structure 400 is not provided in the rotor punching 10 of the motor 80 .

[0195] In the present application, the motor 80 includes a rotor 70, which includes a rotor core 60 and a plurality of permanent magnets 700. The rotor core 60 is evenly distributed with magnet slots 300 in a straight line. A guide structure 400 is provided above the magnet slots 300. The guide structure 400 includes at least two first guide slots 410 and at least two second guide slots 420. The first guide slots 410 and the second guide slots 420 are both inclined in one direction and are asymmetrically arranged with respect to the magnetic pole centerline 500.

[0196] In the guide structure 400, along the magnetic pole centerline 500 to the end of the magnet slot 300, the distance between the groove walls of the first first guide groove 410 and the first second guide groove 420 that are close to each other is recorded as L1, and the distance between the groove walls of the second first guide groove 410 and the second second guide groove 420 that are close to each other is recorded as L2. The distance from the outer peripheral wall of the punch body 100 to the center of the punch body 100 is recorded as Rr. The angle between the groove wall of either the first guide groove 410 or the second guide groove 420 that faces the magnetic pole centerline and the magnetic pole centerline 500 is recorded as θ. The length of the straight groove section 320 in the extension direction of the magnet slot 300 is recorded as Lm. Among them, 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.25.

[0197] Depend on Figure 4 It can be seen that, compared with the comparative example, the torque ripple of the motor 80 of the present application is greatly reduced.

[0198] The punch body 100 is provided with an axial hole 200 , a plurality of magnet slots 300 and a plurality of guide structures 400 .

[0199] A plurality of magnet slots 300 are arranged at intervals around the shaft hole 200 , and the magnet slots 300 are used to mount the permanent magnets 700 of the rotor 70 to form magnetic poles.

[0200] A plurality of guide structures 400 are arranged at intervals around the shaft hole 200 .

[0201] A guide structure 400 is arranged between each magnet slot 300 and the outer peripheral wall of the punch body 100 .

[0202] The guide structure 400 includes a first guide groove 410 and a second guide groove 420. The punch body 100 has a plurality of magnetic pole center lines 500, and each guide structure 400 is located at a magnetic pole center line 500. Specifically, the magnetic pole center line 500 is located between the first guide groove 410 and the second guide groove 420.

[0203] The first guide groove 410 and the second guide groove 420 both extend obliquely. That is, the first guide groove 410 extends obliquely, and the second guide groove 420 extends obliquely. The first guide groove 410 and the second guide groove 420 extend in the same direction.

[0204] The present application rationally arranges the position and extension direction of the guide structure 400, so that the first guide groove 410 and the second guide groove 420 are located on either side of the magnetic pole centerline 500, and the first guide groove 410 and the second guide groove 420 are both arranged obliquely along the rotation direction of the rotor 70, that is, the first guide groove 410 and the second guide groove 420 are arranged asymmetrically along the corresponding magnetic pole centerline 500. This arrangement can specifically adjust the direction of the magnetic lines of force, improve the harmonics of the motor 80, reduce torque pulsation and iron loss, improve the vibration noise of the motor 80, and also achieve improved efficiency of the motor 80.

[0205] 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.

[0206] 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 rotor punching, characterized in that: For a rotor, the rotor punching comprises: A punching sheet body, wherein the punching sheet body is provided with an axial hole and a plurality of magnet slots, wherein the plurality of magnet slots are spaced apart and arranged around the axial hole; The punch body is further provided with a plurality of guide structures, wherein one guide structure is provided between each of the magnet slots and the outer peripheral wall of the punch body, and the guide structure includes a first guide slot and a second guide slot; The punching sheet body has a plurality of magnetic pole center lines, each of the guide structures is located at one of the magnetic pole center lines, and the magnetic pole center line is a line connecting the center of the shaft hole and the center of the magnet slot; In the guide structure, the magnetic pole center line is located between the first guide groove and the second guide groove, and both the first guide groove and the second guide groove extend obliquely along the rotation direction of the rotor.

2. The rotor punching according to claim 1, characterized in that: The guide structure includes a plurality of first guide grooves and a plurality of second guide grooves. Along the circumference of the punch body, the plurality of first guide grooves are arranged at intervals on one side of the magnetic pole center line, and the plurality of second guide grooves are arranged at intervals on the other side of the magnetic pole center line.

3. The rotor punching according to claim 2, characterized in that: In the guide structure, the number of the first guide grooves is equal to the number of the second guide grooves.

4. The rotor punching according to claim 2 or 3, characterized in that: The magnet groove extends tangentially along the circumference of the punch body; The magnet slot includes two magnetic isolation sections and a straight slot section, wherein the straight slot section is connected between the two magnetic isolation sections; The first portion of the magnetic isolation section is located on a side of the straight slot section facing the guide structure; Along the extension direction of the magnet slot, the second portion of the magnetic isolation segment is located between the straight slot segment and the outer peripheral wall of the punching sheet body.

5. The rotor punching according to claim 4, characterized in that: In the guide structure, along the magnetic pole center line to the end of the magnet slot, the distance between the first first guide slot and the first second guide slot where the slot walls are close to each other is recorded as L1, the distance between the second first guide slot and the second second guide slot where the slot walls are close to each other is recorded as L2, the distance from the outer peripheral wall of the punching body to the center of the punching body is recorded as Rr, the angle between the slot wall of either the first guide slot or the second guide slot facing the magnetic pole center line and the magnetic pole center line is recorded as θ, and the length of the straight slot segment in the extension direction of the magnet slot is recorded as Lm; Among them, L2 / L1×sin(θ)×Lm / Rr<1.

6. The rotor punching according to claim 5, characterized in that: L1, L2, Lm, θ and Rr satisfy: 0.1≤L2 / L1×sin(θ)×Lm / Rr≤0.

25.

7. The rotor punching according to claim 5, characterized in that: θ satisfies: 5°≤θ≤30°.

8. The rotor punching according to claim 5, characterized in that: In the guide structure, along the magnetic pole center line to the end of the magnet slot, the distance from the middle of the slot wall of the first first guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L11, the distance from the middle of the slot wall of the first second guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L12, the distance from the middle of the slot wall of the second first guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L21, and the distance from the middle of the slot wall of the second second guide slot facing the magnetic pole center line to the magnetic pole center line is recorded as L22; Among them, L11≤L12≤0.5×L1, L21≤L22≤0.5×L2.

9. A rotor, characterized in that: The invention comprises a rotor core, wherein the rotor core comprises a plurality of rotor punching sheets according to any one of claims 1 to 8, wherein the plurality of rotor punching sheets are stacked.

10. A motor, characterized in that: include: stator; And the rotor according to claim 9, wherein the stator is arranged around the rotor, and the rotor is capable of rotating relative to the stator; the inner diameter of the stator is recorded as Dsin, and the outer diameter of the stator is recorded as Dsout, wherein 0.49≤Dsin / Dsout≤0.

53.

11. A pump body, characterized in that: include: The motor as claimed in claim 10.

12. A vehicle, characterized in that: include: The motor according to claim 10; or The pump body according to claim 11.

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