Rotor, motor and vehicle

Abstract

The embodiment of the invention provides a rotor, a motor and a vehicle, and relates to the technical field of vehicles. The rotor comprises a rotor punching sheet and magnetic steel, and the magnetic steel is arranged in the rotor punching sheet. A first rotor groove, a second rotor groove and a third rotor groove are formed in the rotor punching sheet on a tangent plane perpendicular to the axial direction of the rotor, the third rotor groove is in a kidney-shaped ring shape and is provided with an opening, and the opening of the third rotor groove faces the peripheral side of the rotor punching sheet. The two ends of the third rotor groove are communicated with the first end of the first rotor groove and the first end of the second rotor groove respectively. The magnetic steel comprises first magnetic steel and second magnetic steel, the first rotor groove is filled with the first magnetic steel, the second rotor groove is filled with the second magnetic steel, and the third rotor groove is filled with an insulating material. The third rotor grooves are filled with insulating materials, the strength of the rotor punching sheet can be improved, the magnetic leakage of the rotor is reduced, the magnetic density of the rotor punching sheet can be increased through the first magnetic steel and the second magnetic steel, and the rotating speed of the motor can be increased.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a rotor, a motor and a vehicle. Background Art

[0002] In the new energy vehicle technology, the main development direction of the drive motor of new energy vehicles is to achieve higher speeds. At present, most of the traditional motors used in new energy vehicles are tangential permanent magnet synchronous motors, but there is a large leakage flux at the end of the permanent magnet of the permanent magnet synchronous motor, which makes it difficult to achieve a higher speed. The leakage flux of the rotor can be reduced by setting a rotor magnetic isolation bridge in the permanent magnet synchronous motor, but there is still a problem of insufficient structural strength. The rotor is difficult to withstand large centrifugal forces at high speeds. In order to achieve higher speed electrodes, the strength of the rotor can be increased by increasing the thickness of the magnetic isolation bridge, but this method will affect the magnetic circuit structure of the rotor, reduce the motor performance, and increase the speed of the motor rotor to a small extent.

[0003] At present, in the related technology, the structural strength of the rotor can be improved by adding inner slots or magnetic isolation bridges, and inner slots are set on the rotor and filled with materials to reduce magnetic leakage and improve structural strength. However, the magnetic circuit structure of the rotor is complex, difficult to process and difficult to reach a high speed. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a rotor, a motor and a vehicle, which are conducive to further improving the rotation speed of the rotor.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, an embodiment of the present disclosure provides a rotor, the rotor comprising a rotor punching and a magnetic steel, wherein the magnetic steel is arranged in the rotor punching;

[0007] On a section perpendicular to the axial direction of the rotor, the rotor punching is provided with a first rotor slot, a second rotor slot and a third rotor slot, the third rotor slot is a waist-shaped ring with an opening, the opening of the third rotor slot faces the outer peripheral side of the rotor punching, and two ends of the third rotor slot are respectively connected with a first end of the first rotor slot and a first end of the second rotor slot;

[0008] The magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel is filled in the first rotor slot, the second magnetic steel is filled in the second rotor slot, and the third rotor slot is filled with an insulating material.

[0009] Optionally, the first rotor slot and the second rotor slot respectively extend in a direction close to the outer peripheral side of the rotor punching, and the first rotor slot, the second rotor slot and the third rotor slot form an axially symmetrical figure, and the extension direction of the symmetry axis of the axially symmetrical figure is the same as the radial direction of the rotor punching.

[0010] Optionally, an angle between an extension direction of the first rotor slot and an extension direction of the second rotor slot is 130°-180°.

[0011] Optionally, the first rotor slot, the second rotor slot and the third rotor slot are multiple, and the first rotor slot, the second rotor slot and the third rotor slot that are interconnected constitute a rotor slot group, and the multiple rotor slot groups are symmetrically distributed around the axis of the rotor punching sheet.

[0012] Optionally, the rotor punching is provided with a fourth rotor slot, the extension direction of the fourth rotor slot is the same as the radial direction of the rotor punching, and the fourth rotor slot is located between the first rotor slot of one rotor slot group and the second rotor slot of another adjacent rotor slot group;

[0013] The magnetic steel further includes a third magnetic steel filled in the fourth rotor slot.

[0014] Optionally, the rotor punching is provided with a plurality of fifth rotor slots, the plurality of fifth rotor slots are symmetrically distributed around the axis of the rotor punching, and the fifth rotor slots are filled with insulating material.

[0015] Optionally, the number of the fourth rotor slots is the same as the number of the rotor slot groups, and the fourth rotor slots and the rotor slot groups are arranged alternately.

[0016] Optionally, a tangential length of the third rotor slot along the rotor punching sheet is 8.5 mm-11 mm.

[0017] In a second aspect, an embodiment of the present disclosure provides a motor, comprising any rotor according to the first aspect.

[0018] In a third aspect, an embodiment of the present disclosure provides a vehicle, comprising the motor according to the second aspect.

[0019] The beneficial effects of the technical solution provided by the embodiments of the present disclosure include at least:

[0020] In the rotor provided by the embodiment of the present disclosure, a third rotor slot in a waist-shaped ring shape is provided on the rotor punching sheet, and the third rotor slot is filled with insulating material, which can improve the strength of the rotor punching sheet and reduce the magnetic leakage of the rotor. In addition, the first rotor slot and the second rotor slot are respectively filled with the first magnetic steel and the second magnetic steel, which can increase the magnetic flux density of the rotor punching sheet, improve the air gap magnetic flux waveform of the motor, and thus increase the speed of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a rotor provided for an embodiment of the present disclosure;

[0023] Figure 2 A partial schematic diagram of a rotor provided in an embodiment of the present disclosure.

[0024] The reference numerals in the figures represent respectively:

[0025] 1- rotor punching; 2- magnetic steel; 3- rotor shaft;

[0026] 100- rotor slot group; 101- first rotor slot; 102- second rotor slot; 103- third rotor slot; 104- fourth rotor slot; 105- fifth rotor slot; 106- opening; 107- first magnetic isolation bridge; 108- second magnetic isolation bridge; 109- third magnetic isolation bridge;

[0027] 201 - first magnetic steel; 202 - second magnetic steel; 203 - third magnetic steel.

[0028] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] In the field of new energy vehicle technology, the main development direction of the drive motor of new energy vehicles is to achieve higher speeds. At present, most traditional motors are tangential permanent magnet synchronous motors, but there is a large leakage flux at the end of the permanent magnet, which makes it difficult to achieve a higher speed. The leakage flux can be reduced by setting a rotor magnetic isolation bridge in the motor, but the rotor of the motor needs to withstand a large centrifugal force at high speeds, and the motor rotor structural strength is difficult to meet the requirements of high speeds. In order to adapt to higher speeds, the rotor core strength can be increased by increasing the thickness of the magnetic isolation bridge, but this method will affect the magnetic circuit structure, reduce motor performance, and increase the speed of the motor rotor to a small extent.

[0031] To solve the above problems, the related technology increases the structural strength by adding inner slots or magnetic isolation bridges, setting inner slots on the rotor and filling them with materials to reduce magnetic leakage and increase structural strength. However, the magnetic circuit structure of the rotor is complex, difficult to process and difficult to reach a high speed.

[0032] In view of this, a first aspect of an embodiment of the present disclosure provides a rotor that is conducive to realizing a motor with a higher rotation speed. Figure 1 Schematic diagram of a rotor provided in an embodiment of the present disclosure. Figure 1 As shown, the rotor includes a rotor punching and a magnetic steel, and the magnetic steel is arranged in the rotor punching. On a section perpendicular to the axial direction of the rotor, the rotor punching is provided with a first rotor slot, a second rotor slot and a third rotor slot, the third rotor slot is in a waist-shaped ring shape and has an opening, the opening of the third rotor slot faces the outer peripheral side of the rotor punching, and the two ends of the third rotor slot are respectively connected to the first end of the first rotor slot and the first end of the second rotor slot. The magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel is filled in the first rotor slot, the second magnetic steel is filled in the second rotor slot, and the third rotor slot is filled with insulating material.

[0033] In the rotor provided by the embodiment of the present disclosure, a third rotor slot 103 in a waist-shaped ring shape is provided on the rotor punching 1, and an insulating material is provided in the third rotor slot 103, which can improve the strength of the rotor punching 1 and reduce the magnetic leakage of the rotor. The first rotor slot 101 and the second rotor slot 102 are filled with the first magnetic steel 201 and the second magnetic steel 202 respectively, and the first magnetic steel 201 and the second magnetic steel 202 can increase the magnetic flux density of the rotor and improve the air gap magnetic flux waveform of the rotor, thereby increasing the speed of the motor. Moreover, the rotor punching 1 has a simple structure and is easy to process, which is conducive to reducing the production cost of the motor.

[0034] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0035] like Figure 1As shown, the rotor provided by the embodiment of the present disclosure includes a rotor punching 1 and a magnetic steel 2, and the magnetic steel 2 is located in the rotor punching 1. The rotor punching 1 is provided with a first rotor slot 101, a second rotor slot 102 and a third rotor slot 103, the first rotor slot 101 and the second rotor slot 102 are long strips, and the first rotor slot 101 and the second rotor slot 102 have the same size. The third rotor slot 103 is a waist-shaped ring, with an opening 106, the opening 106 of the third rotor slot 103 faces the outer peripheral side of the rotor punching 1, one end of the third rotor slot 103 at the opening 106 is connected to the first rotor slot 101, and the other end of the third rotor slot 103 at the opening 106 is connected to the second rotor slot 102. Specifically, the opening 106 is located in the straight edge area of ​​the waist-shaped ring, and the arc edge areas of the waist-shaped ring are arranged relatively, that is, the relatively longer side of the waist-shaped ring extends in the tangential direction of the rotor punching 1, and the relatively shorter side of the waist-shaped ring extends in the radial direction of the rotor punching 1. The first rotor slot 101 and the second rotor slot 102 are symmetrically distributed with the center line a of the rotor punching 1 as the symmetry axis, and the shape of the third rotor slot 103 is an axisymmetric figure, and is symmetrical about the center line a of the rotor punching 1. The magnetic steel 2 includes the first magnetic steel 201 and the second magnetic steel 202. The first magnetic steel 201 is filled in the first rotor slot 101, and the second magnetic steel 202 is filled in the second rotor slot 102. The first magnetic steel 201 and the second magnetic steel 202 are used to increase the magnetic flux of the rotor, improve the magnetic flux of the rotor, and improve the air gap magnetic flux waveform of the motor, thereby increasing the speed of the motor. The third rotor slot 103 is filled with insulating material, which can reduce magnetic flux leakage and increase the strength of the rotor.

[0036] Exemplarily, the insulating material filled in the third rotor slot 103 is epoxy resin, and alumina and a high-performance curing agent are added to the epoxy resin for curing, thereby ensuring strength while being resistant to high temperatures.

[0037] In some embodiments of the present disclosure, Figure 1 As shown, the first rotor slot 101 and the second rotor slot 102 extend toward the outer peripheral side of the rotor punching 1. The first rotor slot 101 and the second rotor slot 102 are arranged in a V shape relative to the center line a of the rotor punching 1, and the angle α between the extension direction of the first rotor slot 101 and the extension direction of the second rotor slot 102 is 130°-180°.

[0038] Alternatively, see Figure 1 The rotor provided in the embodiment of the present disclosure further includes a rotor shaft 3 , which passes through a through hole arranged along the axis of the rotor punching 1 and is fixedly connected to the rotor punching 1 , and the rotor shaft 3 is configured to be driven to rotate by the rotor punching 1 .

[0039] In some embodiments of the present disclosure, Figure 1As shown, there are multiple first rotor slots 101, second rotor slots 102 and third rotor slots 103, which are interconnected to form a rotor slot group 100. The multiple rotor slot groups 100 are distributed in an array with the axis of the rotor punching 1 as the center.

[0040] For example, see Figure 1 , eight first rotor slots 101, eight second rotor slots 102 and eight third rotor slots 103 are arranged on the rotor punching 1, and the eight first rotor slots 101, eight second rotor slots 102 and eight third rotor slots 103 are arranged in an array along the center of the rotor punching 1. The interconnected first rotor slots 101, second rotor slots 102 and third rotor slots 103 constitute eight rotor slot groups 100, and the structure of each rotor slot group 100 is exactly the same, and each rotor slot 100 is at the same distance from the outer peripheral side of the punching 1. Correspondingly, the magnetic steel 2 includes eight first magnetic steels 201 and eight second magnetic steels 202, each first rotor slot 101 is provided with a first magnetic steel 201, each second rotor slot 102 is provided with a second magnetic steel 202, and each third rotor slot 103 is filled with insulating material, and the insulating material filled in each third rotor slot 103 is the same.

[0041] In some embodiments of the present disclosure, Figure 1 As shown, the rotor punching 1 is provided with a fourth rotor slot 104, the extension direction of the fourth rotor slot 104 is the same as the radial direction of the rotor punching 1, and the fourth rotor slot 104 is located between the first rotor slot 101 of one rotor slot group 100 and the second rotor slot 102 of another adjacent rotor slot group 100.

[0042] Alternatively, see Figure 1 The magnetic steel 2 further includes a third magnetic steel 203, which is filled in the fourth rotor slot 104. The third magnetic steel 203 filled in the fourth rotor slot 104 can increase the magnetic flux of the rotor, thereby improving the power of the motor, which is conducive to achieving a higher speed motor.

[0043] Optionally, the number of the fourth rotor slots 104 may be the same as the number of the rotor slot groups 100. Exemplarily, the rotor sheet 1 is provided with eight fourth rotor slots 104 and eight rotor slot groups 100, and the eight fourth rotor slots 104 and the eight rotor slot groups 100 are alternately arranged around each other.

[0044] Specifically, in the tangential direction along the rotor punching 1, the width D1 of the fourth rotor slot 104 is 17 mm-21 mm, and in the radial direction along the rotor punching 1, the length L1 of the first rotor slot 104 is 48 mm-53 mm. Preferably, the width D1 of the fourth rotor slot 104 is 20 mm, and the length L1 of the first rotor slot 104 is 52 mm.

[0045] In some embodiments of the present disclosure, Figure 1 As shown, the rotor sheet 1 is provided with a plurality of fifth rotor slots 105, and the plurality of fifth rotor slots 105 are arranged in an array with the axis of the rotor sheet 1 as the center. Specifically, the plurality of fifth rotor slots 105 are arranged in an array along the center of the rotor sheet 1, and the opposite ends of each fifth rotor slot 105 are spaced apart from other adjacent fifth rotor slots 105. The plurality of fifth rotor slots 105 have the same structure and size, and the plurality of fifth rotor slots 105 are specifically the same as the outer peripheral side of the rotor sheet 1.

[0046] In some embodiments of the present disclosure, Figure 1 As shown, one end of the fourth rotor slot 104 close to the axis of the rotor sheet 1 is connected to the fifth rotor slot 105, and the first rotor slot 101, the second rotor slot 102 and the third rotor slot 103 are located on the side of the fifth rotor slot 105 away from the axis of the rotor sheet 1. Exemplarily, the rotor sheet 1 is provided with four fifth rotor slots 105 and eight rotor slot groups 100, and in the radial direction along the rotor sheet 1, each of the four rotor slot groups 100 is surrounded by a fifth rotor slot 105, two fourth rotor slots 104 and the outer peripheral side of the rotor sheet 1, and the other four rotor slot groups 100 are opposite to the interval area between two adjacent fifth rotor slots 105. During the operation of the motor, the N pole formed by the rotor slot group 100 is opposite to the interval between the fifth rotor slot 105, and the S pole formed by the rotor slot group 100 is opposite to the fifth rotor slot 105, and the fourth rotor slot 104 and the fifth rotor slot 105 isolate the N pole magnetic circuit and the S pole magnetic circuit, thereby reducing the magnetic leakage of the rotor. Alternatively, the S pole formed by the rotor slot group 100 is opposite to the interval between the fifth rotor slots 105 , and the N pole formed by the rotor slot group 100 is opposite to the fifth rotor slot 105 .

[0047] Specifically, the width D2 of the fifth rotor slot 105 is 8.5 mm-10 mm, and the distance D3 between two adjacent fifth rotor slots 105 is 8.5 mm-11 mm. Preferably, the width D2 of the fifth rotor slot 105 is 9.5 mm, and the distance D3 between two adjacent fifth rotor slots 105 is 10 mm.

[0048] It should be noted that the fifth rotor slot 105 is filled with an insulating material, such as a mixture of plastic, epoxy resin and alumina, and the filled insulating material can improve the strength of the rotor punching 1 after being cured with a curing agent, and can withstand a higher temperature. Preferably, the material in the fifth rotor slot 105 is the same as the material filled in the third rotor slot 103.

[0049] In some embodiments of the present disclosure, see Figure 1, a plurality of first magnetic isolation bridges 107 are arranged on the rotor sheet 1, and the first magnetic isolation bridges 107 are located between the first rotor slot 101 and the outer peripheral side of the sheet 1, and between the second rotor slot 102 and the outer peripheral side of the sheet 1. Exemplarily, sixteen first magnetic isolation bridges 107 are arranged on the rotor sheet 1, and the sixteen first magnetic isolation bridges 107 are respectively located between the first rotor slot 101 and the second rotor slot 102 and the outer peripheral side of the sheet 1. Since the strength of the insulating material in the third rotor slot 103 is relatively high, it not only reduces the leakage of magnetic flux, but also effectively offsets the radial stress of the rotor, thereby improving the structural strength of the rotor. Moreover, without changing the overall size of the rotor sheet 1, the designable thickness of the first magnetic isolation bridge 107 can be increased to reduce magnetic leakage, thereby improving the motor performance while ensuring the strength, thereby achieving a higher speed.

[0050] Figure 2 A partial schematic diagram of a rotor provided in an embodiment of the present disclosure. In some embodiments of the present disclosure, see Figure 2 , the first rotor slot 101, the second rotor slot 102 and the third rotor slot 103 form an axisymmetric figure, and the extension direction of the axis of symmetry of the axisymmetric figure is the same as the radial direction of the rotor punching 1. It can be seen that the axis of symmetry of the axisymmetric figure formed by the first rotor slot 101, the second rotor slot 102 and the third rotor slot 103 can be the center line a of the rotor punching 1.

[0051] In some embodiments of the present disclosure, see Figure 2 A second magnetic isolation bridge 108 is provided at the opening 106, and the second magnetic isolation bridge 108 is used to reduce leakage magnetic flux.

[0052] Optionally, in the tangential direction of the rotor sheet 1, the width D4 of the second magnetic isolation bridge 108 is 2 mm to 4 mm. Preferably, the width D4 of the second magnetic isolation bridge 108 is 3 mm.

[0053] In some embodiments of the present disclosure, Figure 2 As shown, in the radial direction of the rotor sheet 1, the width D5 of the third rotor slot 103 is 1 mm-2 mm, and in the tangential direction of the rotor sheet 1, the length L2 of the waist-shaped annular third rotor slot 103 along the tangential direction of the rotor sheet 1 is 8.5 mm-11 mm. Preferably, the width D5 of the third rotor slot 103 is 2 mm, and the length L2 of the side of the third rotor slot 103 close to the center of the rotor sheet 1 is 10 mm.

[0054] Alternatively, if Figure 2 As shown, the length L3 of the second rotor slot 102 is 12 mm-15 mm, and the width D6 of the second rotor slot 102 is 2.5 mm-3.5 mm. Preferably, the length L3 of the second rotor slot 102 is 14 mm, and the width D6 of the second rotor slot 102 is 2.9 mm.

[0055] In some embodiments of the present disclosure, Figure 2 As shown, a third magnetic isolation bridge 109 is provided between two adjacent fifth rotor slots 105 of the rotor punching 1. The third magnetic isolation bridge 109 is used to reduce the rotor leakage flux and enhance the structural strength of the rotor.

[0056] In a second aspect, an embodiment of the present disclosure further provides a motor, which comprises any one of the rotors in the above embodiments.

[0057] In the motor provided by the embodiment of the present disclosure, the rotor punching 1 is provided with a first rotor slot 101, a second rotor slot 102 and a third rotor slot 103, the first rotor slot 101 and the second rotor slot 102 are long strips, and the first rotor slot 101 and the second rotor slot 102 have the same size. The third rotor slot 103 is a waist-shaped ring with an opening 106, one end of the third rotor slot 103 at the opening 106 is connected to the first rotor slot 101, and the other end of the third rotor slot 103 at the opening 106 is connected to the second rotor slot 102. Specifically, the opening 106 is located in the straight edge area of ​​the waist-shaped ring, and the arc edge areas of the waist-shaped ring are relatively arranged, that is, the length direction of the waist-shaped ring is the tangent direction of the rotor punching 1. The first rotor slot 101 and the second rotor slot 102 are symmetrically distributed about the center line a of the rotor punching 1, and the third rotor slot 103 itself is symmetrically distributed about the center line a of the rotor punching 1. The magnetic steel 2 includes a first magnetic steel 201 and a second magnetic steel 202. The first magnetic steel 201 is filled in the first rotor slot 101, and the second magnetic steel 202 is filled in the second rotor slot 102. The first magnetic steel 201 and the second magnetic steel 202 are used to increase the magnetic flux density of the rotor, improve the air gap magnetic flux waveform of the motor, and thus increase the speed of the motor. The third rotor slot 103 is filled with insulating material, which can reduce magnetic flux leakage and increase the strength of the rotor.

[0058] In a third aspect, an embodiment of the present disclosure provides a vehicle, which includes the motor in the above embodiment.

[0059] In the vehicle provided by the embodiment of the present disclosure, the rotor sheet 1 of the motor is provided with a first rotor slot 101, a second rotor slot 102 and a third rotor slot 103, the first rotor slot 101 and the second rotor slot 102 are long strips, and the first rotor slot 101 and the second rotor slot 102 have the same size. The third rotor slot 103 is a waist-shaped ring with an opening 106, one end of the third rotor slot 103 at the opening 106 is connected to the first rotor slot 101, and the other end of the third rotor slot 103 at the opening 106 is connected to the second rotor slot 102. Specifically, the opening 106 is located in the straight edge area of ​​the waist-shaped ring, and the arc edge areas of the waist-shaped ring are relatively arranged, that is, the length direction of the waist-shaped ring is the tangent direction of the rotor sheet 1. The first rotor slot 101 and the second rotor slot 102 are symmetrically distributed about the center line a of the rotor sheet 1, and the third rotor slot 103 itself is symmetrically distributed about the center line a of the rotor sheet 1. The magnetic steel 2 includes a first magnetic steel 201 and a second magnetic steel 202. The first magnetic steel 201 is filled in the first rotor slot 101, and the second magnetic steel 202 is filled in the second rotor slot 102. The first magnetic steel 201 and the second magnetic steel 202 are used to increase the magnetic flux density of the rotor, improve the air gap magnetic flux waveform of the motor, and thus increase the speed of the motor. The third rotor slot 103 is filled with insulating material, which can reduce magnetic flux leakage and increase the strength of the rotor.

[0060] It should be noted that the "several" and "at least one" mentioned in this article refer to one or more, and "multiple" and "at least two" refer to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0062] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0064] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0065] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A rotor, characterized in that: It comprises a rotor punching sheet (1) and a magnetic steel (2), wherein the magnetic steel (2) is arranged in the rotor punching sheet (1); On a section perpendicular to the axial direction of the rotor, the rotor punching sheet (1) is provided with a first rotor slot (101), a second rotor slot (102) and a third rotor slot (103); the third rotor slot (103) is in a waist-shaped ring shape and has an opening (106); the opening (106) of the third rotor slot (103) faces the outer peripheral side of the rotor punching sheet (1); and two ends of the third rotor slot (103) are respectively connected to a first end of the first rotor slot (101) and a first end of the second rotor slot (102); The magnetic steel (2) comprises a first magnetic steel (201) and a second magnetic steel (202), wherein the first magnetic steel (201) is filled in the first rotor slot (101), the second magnetic steel (202) is filled in the second rotor slot (102), and the third rotor slot (103) is filled with insulating material.

2. The rotor according to claim 1, characterized in that The first rotor slot (101) and the second rotor slot (102) respectively extend in a direction close to the outer peripheral side of the rotor punching (1); the first rotor slot (101), the second rotor slot (102) and the third rotor slot (103) form an axially symmetrical figure, and the extension direction of the symmetry axis of the axially symmetrical figure is the same as the radial direction of the rotor punching (1).

3. The rotor according to claim 2, characterized in that An included angle between an extension direction of the first rotor slot (101) and an extension direction of the second rotor slot (102) is 130°-180°.

4. The rotor according to claim 2, characterized in that The first rotor slot (101), the second rotor slot (102) and the third rotor slot (103) are respectively a plurality, and the first rotor slot (101), the second rotor slot (102) and the third rotor slot (103) that are interconnected constitute a rotor slot group (100), and the plurality of rotor slot groups (100) are symmetrically distributed around the axis of the rotor punching sheet (1).

5. The rotor according to claim 4, characterized in that The rotor punching (1) is provided with a fourth rotor slot (104), the extension direction of the fourth rotor slot (104) is the same as the radial direction of the rotor punching (1), and the fourth rotor slot (104) is located between a first rotor slot (101) of one rotor slot group (100) and a second rotor slot (102) of another adjacent rotor slot group (100); The magnetic steel (2) further comprises a third magnetic steel (203), wherein the third magnetic steel (203) is filled in the fourth rotor slot (104).

6. The rotor according to claim 5, characterized in that The rotor punching sheet (1) is provided with a plurality of fifth rotor slots (105), the plurality of fifth rotor slots (105) are symmetrically distributed with the axis of the rotor punching sheet (1) as the center, and the fifth rotor slots (105) are filled with insulating material.

7. The rotor according to claim 5, characterized in that The number of the fourth rotor slots (104) is the same as the number of the rotor slot groups (100), and the fourth rotor slots (104) and the rotor slot groups (100) are arranged alternately with each other.

8. The rotor according to any one of claims 1 to 7, characterized in that: The length of the third rotor slot (103) along the tangent direction of the rotor punching sheet (1) is 8.5 mm-11 mm.

9. A motor, characterized in that: The motor comprises the rotor according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle comprises the electric machine of claim 9.

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