Rotor punching sheet, rotor iron core, rotor, motor and vehicle

Abstract

The utility model relates to a rotor punching sheet, a rotor core, a rotor, a motor and a vehicle, the rotor punching sheet forms a first groove group and a second groove group, the first groove group and the second groove group are arranged at an interval in the radial direction of the rotor punching sheet, the second groove group is located at the radial inner side of the first groove group, and the included angle between two second grooves ranges from 150 degrees to 175 degrees; therefore, the rotor punching sheet is adaptive at a high speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a rotor lamination, a rotor core, a rotor, an electric machine and a vehicle. BACKGROUND

[0002] Compared with the traditional double-V structure and UV structure of the same size, the maximum equivalent stress of the traditional double-V structure and UV structure is large under the condition of ultra-high rotation speed, which makes the deformation of the magnetic steel slot on the rotor lamination large, resulting in that the rotor lamination is not suitable for high speed. SUMMARY

[0003] The present application provides a rotor lamination, a rotor core, a rotor, an electric machine and a vehicle, so that the rotor lamination comprises a second slot group located on the radial inner side of the first slot group to adapt to high speed, and at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a rotor lamination is provided, comprising a first slot group and a second slot group, the first slot group and the second slot group are arranged at intervals in the radial direction of the rotor lamination, and the second slot group is located on the radial inner side of the first slot group; wherein the second slot group comprises two second slots and has a virtual extension line extending in the radial direction of the rotor lamination, and the two second slots are respectively located on both sides of the virtual extension line; wherein the included angle between the two second slots ranges from 150 degrees to 175 degrees.

[0005] Optionally, the minimum distance between the two second slots ranges from 1.2 mm to 1.7 mm.

[0006] Optionally, the first slot group comprises two first slots, and the two first slots are respectively located on both sides of the virtual extension line.

[0007] Optionally, the minimum distance between the two second slots is greater than the minimum distance between the two first slots.

[0008] Optionally, the minimum distance between the two first slots ranges from 1.0 mm to 1.5 mm.

[0009] Optionally, the inner surface area of the empty part after placing the magnetic steel in the first slot is S1, and the inner surface area of the empty part after placing the magnetic steel in the second slot is S2, wherein S1>S2.

[0010] Optionally, the inner surface area S1 of the empty part after placing the magnetic steel in the first slot ranges from 16 mm 2 to 25 mm 2 , and the inner surface area S2 of the empty part after placing the magnetic steel in the second slot ranges from 8 mm 2 to 12.5 mm 2 .

[0011] Optionally, the rotor lamination is formed with a third slot group, which is arranged radially apart from the first slot group and radially inside the first slot group.

[0012] Optionally, the third slot group includes two third slots, which are respectively arranged on two sides of the virtual extension line and at two ends of the second slot group.

[0013] Optionally, the included angle between the two second slots is greater than the included angle between the two third slots.

[0014] Optionally, the included angle between the two third slots ranges from 80 degrees to 120 degrees.

[0015] Optionally, the first slot group includes two first slots, which are respectively arranged on two sides of the virtual extension line; wherein the included angle between the two first slots is greater than the included angle between the two third slots.

[0016] Optionally, the included angle between the two third slots ranges from 80 degrees to 120 degrees; and / or; the included angle between the two first slots ranges from 150 degrees to 180 degrees.

[0017] Optionally, the first slot group includes two first slots, which are respectively arranged on two sides of the virtual extension line; wherein the minimum distance between the two third slots is greater than the minimum distance between the two first slots.

[0018] Optionally, the minimum distance between the two first slots ranges from 1.0 mm to 1.5 mm; and / or; the minimum distance between the two third slots ranges from 1.2 mm to 1.7 mm.

[0019] Optionally, the first slot group includes two first slots, which are respectively arranged on two sides of the virtual extension line, the inner surface area of the empty part after placing the magnetic steel in the first slot is S1; the inner surface area of the empty part after placing the magnetic steel in the third slot is S3; wherein S1>S3.

[0020] Optionally, the inner surface area S1 of the empty part after placing the magnetic steel in the first slot ranges from 16 mm 2 to 25 mm 2 ; and / or; the inner surface area of the empty part after placing the magnetic steel in the third slot ranges from 8 mm 2 to 12.5 mm 2 .

[0021] Optionally, the rotor lamination is formed with a third slot group, the third slot group is arranged radially spaced from the first slot group and radially inside the first slot group, the third slot group includes two third slots when the rotor lamination rotates; when the rotor lamination rotates, the stress of the first slot group is σ1=F1 / (b*L1)≤1200MPa, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the first slot on the first slot is F1, and the minimum spacing L1 between the two first slots ranges from 1.0mm to 1.5mm; and / or; when the rotor lamination rotates, the stress of the second slot group is σ2=F2 / (b*L2)≤1200MPa, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the second slot on the second slot is F2, and the minimum spacing L2 between the two second slots ranges from 1.2mm to 1.7mm; and / or; when the rotor lamination rotates, the stress of the third slot group is σ3=F3 / (b*L3)≤1200MPa, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the third slot on the third slot is F3, and the minimum spacing L3 between the two third slots ranges from 1.2mm to 1.7mm. 3 / (b*L3)≤1200MPa, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the third slot on the third slot is F3, and the minimum spacing L3 between the two third slots ranges from 1.2mm to 1.7mm.

[0022] Optionally, the rotor lamination is formed with a third slot group, the third slot group is arranged radially spaced from the first slot group and radially inward of the first slot group, the third slot group comprises two third slots; when the rotor lamination rotates, a deformation amount X1 of the magnetic steel in the first slot group relative to the first slot group is X1 = [F1*(α1 / 2)] / (b*L1*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L1 between the two first slots ranges from 1.0mm to 1.5mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two first slots ranges from 150° to 180°; and / or; when the rotor lamination rotates, a deformation amount X2 of the magnetic steel in the second slot group relative to the second slot group is X2 = [F2*(α2 / 2)] / (b*L2*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L2 between the two second slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two second slots ranges from 150° to 175°; and / or; when the rotor lamination rotates, a deformation amount X3 of the magnetic steel in the third slot group relative to the third slot group is X3 = [F3*(α3 / 2)] / (b*L3*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L3 between the two third slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two third slots ranges from 80° to 120°.

[0023] According to a second aspect of the present application, a rotor core is provided, comprising the rotor lamination according to any one of the above embodiments.

[0024] According to a third aspect of the present application, a rotor is provided, comprising the rotor lamination according to any one of the above embodiments, or the rotor core according to the above embodiments.

[0025] Optionally, the rotor lamination is formed with a third slot group, the third slot group is arranged radially spaced from the first slot group and radially inward of the first slot group, the third slot group comprises two third slots; when the rotor lamination rotates, a deformation amount X1 of the magnetic steel in the first slot group relative to the first slot group is X1 = [F1*(α1 / 2)] / (b*L1*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L1 between the two first slots ranges from 1.0mm to 1.5mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two first slots ranges from 150° to 180°; and / or; when the rotor lamination rotates, a deformation amount X2 of the magnetic steel in the second slot group relative to the second slot group is X2 = [F2*(α2 / 2)] / (b*L2*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L2 between the two second slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two second slots ranges from 150° to 175°; and / or; when the rotor lamination rotates, a deformation amount X3 of the magnetic steel in the third slot group relative to the third slot group is X3 = [F3*(α3 / 2)] / (b*L3*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum spacing L3 between the two third slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination ranges from 150Gpa to 180Gpa, and the included angle between the two third slots ranges from 80° to 120°.

[0026] According to a fourth aspect of the present application, an electric machine is provided, comprising the rotor lamination according to any one of the above embodiments, or the rotor core according to the above embodiments, or the rotor according to any one of the above embodiments.

[0027] According to a fifth aspect of the present application, a vehicle is provided, comprising the rotor lamination according to any one of the above embodiments, or the rotor core according to the above embodiment, or the rotor according to any one of the above embodiments, or the motor according to the above embodiment.

[0028] In the rotor according to the embodiments of the present application, the second slot group is arranged at the radially inner side of the first slot group, and the included angle between the two second slots ranges from 150 degrees to 175 degrees, so that the second slot group at the radially inner side of the first slot group can further reduce the deformation of the magnetic steel in the second slot group; the rotor lamination is more suitable for high speed; and the technical problem of the prior art that the rotor lamination is not suitable for high speed is solved.

[0029] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0032] Figure 1 is a structural schematic diagram of a rotor lamination provided in an exemplary embodiment of the present disclosure;

[0033] Figure 2 is a schematic diagram of the relationship between the minimum spacing between the second slots and the average stress of the second slots in the rotor lamination provided in an exemplary embodiment of the present disclosure;

[0034] Figure 3 is a schematic diagram of the relationship between the included angle between the second slots and the average stress of the second slots in the rotor lamination provided in an exemplary embodiment of the present disclosure;

[0035] Figure 4 is a schematic diagram of the comparison between the rotor lamination and the existing rotor lamination provided in an exemplary embodiment of the present disclosure;

[0036] Figure 5 is a schematic diagram of the stacking ratio and the yield rate of the rotor lamination provided in an exemplary embodiment of the present disclosure.

[0037] Explanation of Reference Signs:

[0038] 1, rotor lamination; 2, first slot group; 21, first slot; 3, second slot group; 31, second slot; 4, third slot group; 41, third slot; 5, existing rotor lamination; α1, included angle of first slot; α2, included angle of second slot; α3, included angle of third slot; L1, minimum distance between first slots; L2, minimum distance between second slots; L3, minimum distance between third slots. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the protection scope of the present application.

[0040] According to a first aspect of the present application, referring to Figure 1 , Figure 2 , Figure 3 The rotor lamination 1 provided by the present disclosure is formed with a first slot group 2 and a second slot group 3, the first slot group 2 and the second slot group 3 are arranged at intervals in the radial direction of the rotor lamination 1, and the second slot group 3 is located on the radial inner side of the first slot group 2; wherein the second slot group 3 includes two second slots 31 and has a virtual extension line extending in the radial direction of the rotor lamination 1, and the two second slots 31 are respectively located on the two sides of the virtual extension line; wherein the included angle α2 between the two second slots ranges from 150 degrees to 175 degrees.

[0041] It can be understood that, compared with the first slot group 2, the second slot group 3 has a greater contribution to adapting to high speed, and the setting position and the included angle of the second slot group 3 jointly meet the requirements of stress and deformation of the second slot group 3.

[0042] In the present embodiment, the second slot group 3 is arranged on the radial inner side of the first slot group 2, so that the included angle α2 between the two second slots ranges from 150 degrees to 175 degrees; thereby adapting the rotor lamination 1 to high speed.

[0043] In an embodiment, the minimum distance L2 between the two second slots ranges from 1.2 millimeters to 1.7 millimeters.

[0044] In an embodiment, referring to Figure 1 , the first slot group 2 includes two first slots 21, and the two first slots 21 are respectively located on the two sides of the virtual extension line.

[0045] Wherein, the two first slots 21 are symmetrical about the virtual extension line.

[0046] It can be understood that the first groove group 2 includes two first grooves 21, and the two first grooves 21 are symmetrical about the virtual extension line, so that the stress of the centrifugal force acting on the first groove group 2 is more uniform, and the structure of the first groove group 2 is adapted to high speed.

[0047] In an embodiment, referring to Figure 1 , the minimum spacing L2 between the two second grooves is greater than the minimum spacing L1 between the two first grooves.

[0048] It can be understood that the minimum spacing L2 between the two second grooves is greater than the minimum spacing L1 between the two first grooves, which can better alleviate the deformation of the second groove group 3, reduce the stress of the second groove group 3, and at the same time, improve the tensile strength of the second groove group 3.

[0049] In an embodiment, referring to Figure 1 , the minimum spacing L1 between the two first grooves ranges from 1.0 mm to 1.5 mm.

[0050] The minimum spacing L1 between the two first grooves is any one of 1.0 mm, 1.2 mm, 1.3 mm, and 1.5 mm.

[0051] It can be understood that by setting the minimum spacing L1 between the two first grooves to range from 1.0 mm to 1.5 mm, the deformation of the first groove group 2 can be better alleviated, the stress of the first groove group 2 can be reduced, and at the same time, the tensile strength of the first groove group 2 can be improved.

[0052] In an embodiment, referring to Figure 1 , the inner surface area of the free part after the magnetic steel is placed in the first groove 21 is S1, and the inner surface area of the free part after the magnetic steel is placed in the second groove 31 is S2, wherein S1>S2.

[0053] It can be understood that the design logic is that the first groove 21 has a larger setting space along the circumference of the rotor punching sheet 1, which facilitates the design of a larger inner surface area of the free part after the magnetic steel is placed.

[0054] It should be noted that by increasing the inner surface area of the free part after the magnetic steel is placed in the first groove 21, the heat dissipation area of the rotor punching sheet 1 is high, and thus the heat dissipation capacity of the rotor punching sheet 1 is improved.

[0055] In an embodiment, referring to Figure 1 , the inner surface area S1 of the free part after the magnetic steel is placed in the first groove 21 ranges from 16 mm 2 to 25 mm 2, the inner surface area S1 of the empty part after the magnetic steel is placed in the second slot 31 is in the range of 8mm 2 to 12.5mm 2 .

[0056] , the inner surface area S1 of the empty part after the magnetic steel is placed in the first slot 21 is any one of 16mm 2 , 18mm 2 , 20mm 2 , 23mm 2 , 25mm 2 .

[0057] It can be understood that the inner surface area S1 of the empty part after the magnetic steel is placed in the first slot 21 is in the range of 16mm 2 to 25mm 2 , by increasing the inner surface area S1 of the empty part after the magnetic steel is placed in the first slot 21, the heat dissipation capacity of the first slot group 2 is further enhanced, and the heat dissipation capacity of the rotor lamination 1 is improved.

[0058] In an embodiment, referring to Figure 1 , the rotor lamination 1 is formed with a third slot group 4, the third slot group 4 is arranged at the radial direction of the rotor lamination 1 and is located at the radial inner side of the first slot group 2.

[0059] It can be understood that the third slot group 4 is located at the outer side of the first slot group 2, and the third slot group 4 also has the effect of reducing the deformation amount of the magnetic steel inside to avoid stress concentration.

[0060] In an embodiment, referring to Figure 1 , the third slot group 4 includes two third slots 41, and the two third slots 41 are respectively arranged on both sides of the virtual extension line and are located at both ends of the second slot group 3.

[0061] It can be understood that the third slot 41 is symmetrical about the virtual extension line, so that the deformation of the third slot group 4 can be better relieved, the stress of the third slot group 4 is reduced, and the tensile strength of the third slot group 4 is improved.

[0062] In an embodiment, referring to Figure 1 , the included angle of the two second slots 31 is greater than the included angle a3 of the two third slots.

[0063] It can be understood that by making the included angle of the two second slots 31 greater than the included angle a3 of the two third slots, the deformation of the second slot group 3 can be better relieved, the stress of the second slot group 3 is reduced, and the tensile strength of the second slot group 3 is improved.

[0064] In an embodiment, referring to Figure 1, the included angle a3 between the two third grooves ranges from 80 degrees to 120 degrees.

[0065] , the included angle a3 between the two third grooves can be any one of 80 degrees, 100 degrees, and 120 degrees.

[0066] It can be understood that when the included angle a3 between the two third grooves ranges from 80 degrees to 120 degrees, the smaller the included angle a3 between the two third grooves 41, the smaller the stress of the two third grooves, but the tensile strength will be weakened accordingly, so that the included angle a3 between the two third grooves ranges from 80 degrees to 120 degrees, which can meet the centrifugal stress at the third groove group 4, thereby reducing the deformation of the third groove group 4.

[0067] In an embodiment, referring to Figure 1 , the first groove group 2 includes two first grooves 21, and the two first grooves 21 are respectively located on both sides of the virtual extension line; wherein the included angle a1 between the two first grooves is greater than the included angle a3 between the two third grooves.

[0068] It can be understood that the included angle a1 between the two first grooves is greater than the included angle a3 between the two third grooves, so that the deformation of the first groove group 2 can be better relieved, the stress of the first groove group 2 is reduced, and the tensile strength of the first groove group 2 is improved, so that the rotor core 1 is adapted to high speed.

[0069] In an embodiment, referring to Figure 1 , the included angle a3 between the two third grooves ranges from 80 degrees to 120 degrees; and / or; the included angle a1 between the two first grooves ranges from 150 degrees to 180 degrees.

[0070] , the included angle a3 between the two third grooves can be any one of 80 degrees, 100 degrees, and 120 degrees, and the included angle a1 between the two first grooves can be any one of 150 degrees, 165 degrees, and 180 degrees.

[0071] It can be understood that the included angle a3 between the two third grooves ranges from 80 degrees to 120 degrees; and / or; the included angle a1 between the two first grooves ranges from 150 degrees to 180 degrees; the first groove group 2 and the third groove group 4 can meet the requirements of deformation and tensile strength, thereby adapting to high speed.

[0072] In an embodiment, referring to Figure 1 , the first groove group 2 includes two first grooves 21, and the two first grooves 21 are respectively located on both sides of the virtual extension line; wherein the minimum distance L3 between the two third grooves is greater than the minimum distance L1 between the two first grooves.

[0073] It can be understood that the included angle α1 of the two first grooves is greater than the included angle α3 of the two third grooves, so that the deformation of the first groove group 2 can be better relieved, the stress of the first groove group 2 is reduced, and the tensile strength of the first groove group 2 is improved, so that the rotor punching sheet 1 is adapted to high speed.

[0074] In an embodiment, referring to Figure 1 , the minimum distance L1 between the two first grooves ranges from 1.0 mm to 1.5 mm; and / or; the minimum distance L3 between the two third grooves ranges from 1.2 mm to 1.7 mm.

[0075] The minimum distance L1 between the two first grooves can be any one of 1.0 mm, 1.2 mm, 1.3 mm, 1.5 mm; and / or; the minimum distance L3 between the two third grooves ranges from 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm.

[0076] It can be understood that the minimum distance L1 between the two first grooves ranges from 1.0 mm to 1.5 mm; and / or; the minimum distance L3 between the two third grooves ranges from 1.2 mm to 1.7 mm; the first groove group 2 and / or the third groove group 4 can meet the requirements of deformation and tensile strength, thereby adapting to high speed.

[0077] In an embodiment, referring to Figure 1 , the first groove group 2 includes two first grooves 21, and the two first grooves 21 are respectively located on both sides of the virtual extension line, the inner surface area of the empty part after the first groove 21 placing the magnetic steel is S1; the inner surface area of the empty part after the third groove 41 placing the magnetic steel is S3; wherein S1>S3.

[0078] It can be understood that the first groove 21 is located on the side of the third groove 41 away from the center of the rotor punching sheet 1, so that the setting space of the first groove 21 along the circumference is larger than that of the third groove 41 along the circumference, thereby making the inner surface area of the empty part after the first groove 21 placing the magnetic steel have a larger area, thereby further improving the heat dissipation effect of the rotor punching sheet 1.

[0079] In an embodiment, referring to Figure 2 , the inner surface area S1 of the empty part after the first groove 21 placing the magnetic steel ranges from 16 mm 2 to 25 mm 2 ; and / or; the inner surface area of the empty part after the third groove 41 placing the magnetic steel ranges from 8 mm 2 to 12.5 mm 2 .

[0080] The inner surface area of the free space after the magnetic steel is placed in the first slot 21 can be any one of 1.0 mm, 1.2 mm, 1.3 mm, 1.5 mm.

[0081] The inner surface area of the free space after the magnetic steel is placed in the third slot 41 can be any one of 8 mm 2 , 10 mm 2 , 12.5 mm 2 .

[0082] It can be understood that the inner surface area S1 of the free space after the magnetic steel is placed in the first slot 21 is any one of 16 mm 2 to 25 mm 2 , which can better relieve the deformation of the first slot group 2, reduce the stress of the first slot group 2, and at the same time, improve the tensile strength of the first slot group 2, so that the rotor punching sheet 1 is adapted to high speed.

[0083] In an embodiment, please refer to Figure 3 , Figure 1 , Figure 2The rotor sheet 1 is formed with a third slot group 4, which is arranged radially apart from the first slot group 2 and located radially inside the first slot group 2, and includes two third slots 41 when the rotor sheet 1 rotates; the stress of the first slot group 2 is σ1=F1 / (b*L1)≤1200MPa when the rotor sheet 1 rotates, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the first slot 21 on the first slot 21 is F1, and the minimum distance L1 between the two first slots ranges from 1.0mm to 1.5mm; and / or; the stress of the second slot group 3 is σ2=F2 / (b*L2)≤1200MPa when the rotor sheet 1 rotates, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the second slot 31 on the second slot 31 is F2, and the minimum distance L2 between the two second slots ranges from 1.2mm to 1.7mm; and / or; the stress of the third slot group 4 is σ3=F3 / (b*L3)≤1200MPa when the rotor sheet 1 rotates, wherein the rotor core axial height b ranges from 100mm to 150mm, the centrifugal force of the magnetic steel in the third slot 41 on the third slot 41 is F3, and the minimum distance L3 between the two third slots ranges from 1.2mm to 1.7mm.

[0084] Wherein, F1=2F pm1 cos(α1 / 2)+F jx1 .

[0085] Wherein, F2=2F pm2 cos(α2 / 2)+2K1F pm1 cos(α1 / 2)+F jx2 .

[0086] Wherein, F3=2F pm3 cos(α3 / 2)+2F pm2 cos(α2 / 2)+2K2F pm1 cos(α1 / 2)+F jx3 .

[0087] Wherein, K1, K2, K3 are independently selected from 150Gpa to 180Gpa.

[0088] It can be understood that, F pm1F is the centrifugal force of the magnetic steel in the first slot 21 jx1 F is the centrifugal force of the first slot 21 pm2 F is the centrifugal force of the magnetic steel in the second slot 31 jx2 F is the centrifugal force of the second slot 31 pm3 F is the centrifugal force of the magnetic steel in the third slot 41 jx3 F is the centrifugal force of the third slot 41.

[0089] It should be noted that the stress of the first slot group 2, the second slot group 3, and the third slot group 4 is less than or equal to 1200MPa, thereby reducing the deformation amount of the first slot group 2, the second slot group 3, and the third slot group 4, so that the first slot group 2, the second slot group 3, and the third slot group 4 are adapted to high speed.

[0090] In an embodiment, referring to Figure 2 , Figure 4 , the rotor lamination 1 is formed with a third slot group 4, which is spaced apart from the first slot group 2 in the radial direction of the rotor lamination 1 and located radially inward of the first slot group 2, the third slot group 4 comprising two third slots 41 when the rotor lamination 1 rotates; when the rotor lamination 1 rotates, the deformation amount X1 of the magnetic steel in the first slot group 2 relative to the first slot group 2 is X1 = [F1*(α1 / 2)] / (b*L1*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum distance L1 between the two first slots ranges from 1.0mm to 1.5mm, the elastic modulus of the rotor lamination 1 ranges from 150Gpa to 180Gpa, and the included angle α1 between the two first slots ranges from 150 degrees to 180 degrees; and / or; when the rotor lamination 1 rotates, the deformation amount X2 of the magnetic steel in the second slot group 3 relative to the second slot group 3 is X2 = [F2*(α2 / 2)] / (b*L2*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum distance L2 between the two second slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination 1 ranges from 150Gpa to 180Gpa, and the included angle α2 between the two second slots ranges from 150 degrees to 175 degrees; and / or; when the rotor lamination 1 rotates, the deformation amount X3 of the magnetic steel in the third slot group 4 relative to the third slot group 4 is X3 = [F3*(α3 / 2)] / (b*L3*E)≤0.05mm, wherein the rotor core axial height b ranges from 100mm to 150mm, the minimum distance L3 between the two third slots ranges from 1.2mm to 1.7mm, the elastic modulus of the rotor lamination 1 ranges from 150Gpa to 180Gpa, and the included angle α3 between the two third slots ranges from 80 degrees to 120 degrees.

[0091] F1=2F pm1 cos(α1 / 2)+F jx1 .

[0092] F2=2F pm2 cos(α2 / 2)+2K1F pm1 cos(α1 / 2)+F jx2 .

[0093] F3=2F pm3 cos(α3 / 2)+2F pm2 cos(α23 / 2)+2K2F pm1 cos(α1 / 2)+F jx3 .

[0094] K1, K2, K3 are independently selected from 150 Gpa to 180 Gpa.

[0095] It can be understood that the deformation amount of the first groove group 2, the second groove group 3, and the third groove group 4 is less than or equal to 0.05 mm, thereby reducing the deformation amount of the first groove group 2, the second groove group 3, and the third groove group 4, so that the first groove group 2, the second groove group 3, and the third groove group 4 are adapted to high speed.

[0096] It should be noted that, Figure 4 When the included angle α2 between the two second grooves is 162.5 degrees, a single factor variable diagram of the minimum distance L2 between the two second grooves is shown, by adjusting the size of the minimum distance L2 between the two second grooves, thereby adjusting the stress received by the second groove group 3, so that the stress received by the second groove group 3 is less than or equal to 1200 Mpa; by analogy, the stress received by the first groove group 2 and the third groove group 4 is less than or equal to 1200 Mpa respectively.

[0097] It should be noted that when the minimum distance L2 between the two second grooves is 1.45 mm, a single factor variable diagram of the included angle α2 between the two second grooves is shown, by adjusting the size of the included angle α2 between the two second grooves, thereby adjusting the stress received by the second groove group 3, so that the stress received by the second groove group 3 is less than or equal to 1200 Mpa; by analogy, the stress received by the first groove group 2 and the third groove group 4 is less than or equal to 1200 Mpa respectively.

[0098] In an embodiment, as Figure 4 shown, it is a comparison diagram of the relationship between the speed of the existing rotor lamination 5 and the maximum stress, and the relationship between the speed of the rotor lamination 1 disclosed in the present application and the maximum stress.

[0099] F1=2F Figure 5It can be intuitively understood that the maximum stress of the rotor lamination 1 disclosed in the application is smaller than the maximum stress of the existing rotor lamination 5 at the same speed.

[0100] wherein, by ​ It can be intuitively understood that when the speed is 30000 rpm to 35000 rpm, the maximum stress of the rotor lamination 1 disclosed in the application is less than 1200 Mpa, and the maximum stress of the existing rotor lamination 5 is greater than 1200 Mpa, so the stress of the rotor lamination 1 disclosed in the application is smaller.

[0101] In one embodiment, the amorphous thin strip is arranged in at least two layers.

[0102] wherein, the thickness of the rotor lamination 1 is L r , the outer diameter of the rotor lamination 1 is D r , the stacking diameter coefficient of the rotor lamination 1 is L r / D r , and the stacking diameter coefficient ranges from 0.35 ‰ to 2.46 ‰.

[0103] wherein, the stacking diameter coefficient can be any one of 0.35 ‰, 1 ‰, 2 ‰, and 2.46 ‰.

[0104] In one embodiment, as ​ shown, when the stacking diameter ratio of the rotor lamination 1 is greater than 0 and less than or equal to 1.5 x 10 -3 , the yield rate of the rotor lamination 1 is greater than 90%.

[0105] In one embodiment, at least two third grooves 41 are further included, and the two third grooves 41 are respectively located on the outer sides of the two second grooves 31. The first grooves 21, the second grooves 31, and the third grooves 41 are arranged in sections and are provided with magnetic steels, wherein the types of the magnetic steels are not more than 2.

[0106] wherein, the magnetic steels in the third grooves 41 are high magnetic steel grades.

[0107] wherein, the high magnetic steel grades include but are not limited to 48UH, 50UH, and 52UH.

[0108] It can be understood that by using the third grooves 41 as high magnetic steel grades, the deformation amount of the magnetic steels in the third grooves 41 is further reduced, so that the third grooves 41 are adapted to high speed.

[0109] In one embodiment, at least two third grooves 41 are further included, and the two third grooves 41 are respectively located on the outer sides of the two second grooves 31. Heat-deformed magnetic steels are arranged between adjacent second grooves 31 and adjacent third grooves 41.

[0110] It can be understood that the hot deformed magnetic steel is used to expand when heated, so that the magnetic steel can better match the magnetic steel slot, to avoid the magnetic steel loose or fall off.

[0111] According to a second aspect of the present application, a rotor core is provided, comprising the rotor sheet 1 according to any one of the above embodiments.

[0112] According to a third aspect of the present application, a rotor is provided, comprising the rotor sheet 1 according to any one of the above embodiments, or the rotor core according to the above embodiments.

[0113] In an embodiment, the rotor sheet 1 is in interference fit with the rotating shaft, and the interference of the interference fit is in the range of 0.04mm to 0.12m.

[0114] It can be understood that the rotor sheet 1 is in interference fit with the rotating shaft, which improves the stability of the assembly of the rotor sheet 1 and the rotating shaft.

[0115] According to a fourth aspect of the present application, an electric machine is provided, comprising the rotor sheet 1 according to any one of the above embodiments, or the rotor core according to the above embodiments, or the rotor according to any one of the above embodiments.

[0116] According to a fifth aspect of the present application, a vehicle is provided, comprising the rotor sheet 1 according to any one of the above embodiments, or the rotor core according to the above embodiments, or the rotor according to any one of the above embodiments, or the electric machine according to the above embodiments.

[0117] The vehicle can be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereon.

[0118] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0119] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0120] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0121] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and in accordance with the technical essence of the present application, are still within the scope of the technical solution of the present application.

Claims

1. A rotor lamination (1), comprising a first slot group (2) and a second slot group (3), wherein the first slot group (2) and the second slot group (3) are radially spaced apart in the rotor lamination (1), and the second slot group (3) is located radially inside the first slot group (2), characterized in that, The second slot group (3) includes two second slots (31) and has a virtual extension line extending radially along the rotor lamination (1), with the two second slots (31) located on both sides of the virtual extension line; wherein the included angle between the two second slots (31) ranges from 150 degrees to 175 degrees.

2. The rotor lamination (1) according to claim 1, characterized in that, The minimum spacing between the two second grooves (31) ranges from 1.2 mm to 1.7 mm.

3. The rotor lamination (1) according to claim 2, characterized in that, The first slot group (2) includes two first slots (21), which are located on both sides of the virtual extension line.

4. The rotor lamination (1) according to claim 3, characterized in that, The minimum distance between the two second slots (31) is greater than the minimum distance between the two first slots (21).

5. The rotor lamination (1) according to claim 4, characterized in that, The minimum spacing between the two first grooves (21) ranges from 1.0 mm to 1.5 mm.

6. The rotor lamination (1) according to claim 3, characterized in that, The inner surface area of ​​the empty part of the first slot (21) after the magnet is placed is S1, and the inner surface area of ​​the empty part of the second slot (31) after the magnet is placed is S2, wherein S1 > S2.

7. The rotor lamination (1) according to claim 6, characterized in that, The inner surface area S1 of the empty portion after the magnet is placed in the first slot (21) is 16 mm². 2 Up to 25mm 2 And / or; the range of the inner surface area S2 of the empty portion after the magnet is placed in the second slot (31) is 8 mm. 2 Up to 12.5mm 2 .

8. The rotor lamination (1) according to claim 3, characterized in that, The rotor lamination (1) has a third groove group (4). The third groove group (4) and the first groove group (2) are arranged at a distance in the radial direction of the rotor lamination (1) and are located in the radial inner side of the first groove group (2). The third groove group (4) includes two third grooves (41). The two third grooves (41) are respectively arranged on both sides of the virtual extension line and are located at both ends of the second groove group (3).

9. The rotor lamination (1) according to claim 8, characterized in that, The included angle between the two second grooves (31) is greater than the included angle between the two third grooves (41).

10. The rotor lamination (1) according to claim 9, characterized in that, The included angle between the two third grooves (41) ranges from 80 degrees to 120 degrees.

11. The rotor lamination (1) according to claim 8, characterized in that, The angle between the two first grooves (21) is greater than the angle between the two third grooves (41).

12. The rotor lamination (1) according to claim 11, characterized in that, The included angle between the two third grooves (41) is between 80 degrees and 120 degrees; and / or the included angle between the two first grooves (21) is between 150 degrees and 180 degrees.

13. The rotor lamination (1) according to claim 8, characterized in that, The minimum distance between the two third grooves (41) is greater than the minimum distance between the two first grooves (21).

14. The rotor lamination (1) according to claim 13, characterized in that, The minimum spacing between the two first grooves (21) ranges from 1.0 mm to 1.5 mm; and / or the minimum spacing between the two third grooves (41) ranges from 1.2 mm to 1.7 mm.

15. The rotor lamination (1) according to claim 8, characterized in that, The inner surface area of ​​the empty part of the first slot (21) after the magnet is placed is S1; the inner surface area of ​​the empty part of the third slot (41) after the magnet is placed is S3. Where S1 > S3.

16. The rotor lamination (1) according to claim 15, characterized in that, The inner surface area S1 of the empty portion of the first groove (21) after the magnet is placed is 16 mm. 2 Up to 25mm 2 ; and / or ; the inner surface area of ​​the empty portion of the third groove (41) after the magnet is placed is 8 mm. 2 Up to 12.5mm 2 .

17. The rotor lamination (1) according to claim 3, characterized in that, When the rotor lamination (1) rotates, the stress σ1 of the first slot group (2) with magnets installed is ≤1200MPa.

18. The rotor lamination (1) according to claim 17, characterized in that, σ1=F1 / (b*L1), wherein multiple rotor laminations are stacked to form a rotor core, the axial height b of the rotor core is in the range of 100 mm to 150 mm, the centrifugal force of the magnet in the first slot (21) on the first slot (21) is F1, and the minimum distance L1 between the two first slots (21) is in the range of 1.0 mm to 1.5 mm.

19. The rotor lamination (1) according to claim 2, characterized in that, When the rotor lamination (1) rotates, the stress σ2 of the second slot group (3) with magnets installed is ≤1200MPa.

20. The rotor lamination (1) according to claim 19, characterized in that, σ2=F2 / (b*L2), wherein multiple rotor laminations are stacked to form a rotor core, the axial height b of the rotor core is in the range of 100 mm to 150 mm, the centrifugal force of the magnet in the second slot (31) on the second slot (31) is F2, and the minimum spacing L2 between the two second slots (31) is in the range of 1.2 mm to 1.7 mm.

21. The rotor lamination (1) according to claim 8, characterized in that, When the rotor lamination (1) rotates, the stress σ3 of the third slot group (4) with magnets installed is ≤1200MPa.

22. The rotor lamination (1) according to claim 21, characterized in that, σ3=F3 / (b*L3), wherein multiple rotor laminations are stacked to form a rotor core, the axial height b of the rotor core is in the range of 100 mm to 150 mm, the centrifugal force of the magnet in the third slot (41) on the third slot (41) is F3, and the minimum distance L3 between the two third slots (41) is in the range of 1.2 mm to 1.7 mm.

23. The rotor lamination (1) according to claim 3, characterized in that, When the rotor lamination (1) rotates, the deformation of the magnet in the first slot group (2) relative to the first slot group (2) is X1≤0.05 mm.

24. The rotor lamination (1) according to claim 23, characterized in that, X1=[F1*(α1 / 2)] / (b*L1*E), where the axial height b of the rotor core ranges from 100 mm to 150 mm, the minimum distance L1 between the two first slots (21) ranges from 1.0 mm to 1.5 mm, the elastic modulus of the rotor lamination (1) ranges from 150 Gpa to 180 Gpa, and the included angle between the two first slots (21) ranges from 150 degrees to 180 degrees.

25. The rotor lamination (1) according to claim 2, characterized in that, When the rotor lamination (1) rotates, the deformation of the magnet in the second slot group (3) relative to the second slot group (3) is X2=[F2*(α2 / 2)] / (b*L2*E)≤0.05 mm.

26. The rotor lamination (1) according to claim 25, characterized in that, X2=[F2*(α2 / 2)] / (b*L2*E), where the axial height b of the rotor core ranges from 100 mm to 150 mm, the minimum distance L2 between the two second slots (31) ranges from 1.2 mm to 1.7 mm, the elastic modulus of the rotor lamination (1) ranges from 150 Gpa to 180 Gpa, and the included angle between the two second slots (31) ranges from 150 degrees to 175 degrees.

27. The rotor lamination (1) according to claim 8, characterized in that, When the rotor lamination (1) rotates, the deformation of the magnet in the third slot group (4) relative to the third slot group (4) is X3=[F3*(α3 / 2)] / (b*L3*E)≤0.05 mm.

28. The rotor lamination (1) according to claim 27, characterized in that, X3=[F3*(α3 / 2)] / (b*L3*E), where the axial height b of the rotor core ranges from 100 mm to 150 mm, the minimum distance L3 between the two third slots (41) ranges from 1.2 mm to 1.7 mm, the elastic modulus of the rotor lamination (1) ranges from 150 Gpa to 180 Gpa, and the included angle between the two third slots (41) ranges from 80 degrees to 120 degrees.

29. A rotor core, characterized in that, It includes rotor laminations (1) as described in any one of claims 1 to 28, wherein a plurality of rotor laminations (1) are stacked.

30. A rotor, characterized in that, It includes the rotor lamination (1) as described in any one of claims 1 to 28, or the rotor core as described in claim 29.

31. The rotor according to claim 30, characterized in that, It also includes a rotating shaft, wherein the rotor lamination (1) is in an interference fit with the rotating shaft, and the interference amount of the interference fit ranges from 0.04 mm to 0.12 m.

32. An electric motor, characterized in that, It includes the rotor lamination (1) as described in any one of claims 1 to 28, or the rotor core as described in claim 29, or the rotor as described in any one of claims 30 to 31.

33. A vehicle, characterized in that, It includes the rotor lamination (1) as described in any one of claims 1 to 28, or the rotor core as described in claim 29, or the rotor as described in any one of claims 30 to 31, or the motor as described in claim 32.

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