Rotor punching sheet, rotor iron core, motor and compressor

Abstract

The utility model discloses a rotor punching sheet, a rotor core, a motor and a compressor, and relates to the technical field of motors, the rotor punching sheet comprises a punching sheet body, the punching sheet body is provided with a plurality of magnetic steel groove groups, the plurality of magnetic steel groove groups are arranged along the circumferential direction of the punching sheet body, a magnetic isolation group is arranged between two adjacent magnetic steel groove groups, and the magnetic isolation group is arranged between the magnetic steel groove groups. The magnetism isolating group comprises a plurality of magnetism isolating grooves, and the multiple magnetism isolating grooves are arranged at intervals in the extension direction of the q axis; according to the technical scheme provided by the utility model, iron loss can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor punching sheet, a rotor iron core, a motor and a compressor. Background Art

[0002] Brushless motors with permanent magnets embedded in the rotor are widely used in home appliances such as air conditioner compressors due to their high efficiency. In the current home appliance field, the efficiency of motors has reached a relatively high level, but the efficiency of motors is difficult to improve further, mainly because the loss caused by iron loss cannot be suppressed. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor punching sheet, a rotor core, a motor and a compressor, aiming at reducing iron loss.

[0004] To achieve the above-mentioned purpose, the rotor punching proposed in the utility model includes a punching body, the punching body is provided with a plurality of magnetic steel slot groups, the plurality of magnetic steel slot groups are arranged along the circumferential direction of the punching body, a magnetic isolation group is provided between two adjacent magnetic steel slot groups, the magnetic isolation group includes a plurality of magnetic isolation grooves, and the plurality of magnetic isolation grooves are arranged at intervals along the extension direction of the q-axis.

[0005] In one embodiment, the minimum slot width of the slot segment of the magnetic steel slot group for permanent magnet installation is H m The minimum width of each magnetic isolation groove is H n , the H n The range is: 0.4≤H n ≤2*H m .

[0006] In one embodiment, the minimum distance between the magnetic isolation groove and the outer edge of the punch body is D 1 , the D 1 The range is: 0.4≤D 1 ≤2*H m .

[0007] In one embodiment, the minimum distance between two adjacent magnetic isolation grooves is D 2 , the D 2 The range is: 0.4≤D 2 ≤2*H m .

[0008] In one embodiment, the minimum distance between the magnetic isolation slot and the magnetic steel slot group is D 3 , the D 3 The range is: 0.4≤D 3 ≤2*H m .

[0009] In one embodiment, the punch body is further provided with a rivet hole, the rivet hole is located on the q axis and between the magnetic isolation group and the center of the punch body, and the minimum distance between the magnetic isolation groove and the rivet hole is D 4 , the D 4 The range is: 2≤D 4 ≤3*H m .

[0010] In one embodiment, the magnetic steel slot group includes a first magnetic steel slot and a second magnetic steel slot, and the first magnetic steel slot and the second magnetic steel slot respectively extend toward the outer peripheral surface of the punching sheet body, and at least one of the magnetic isolation slots is spaced apart from the first magnetic steel slot of an adjacent magnetic steel slot group or the second magnetic steel slot of another adjacent magnetic steel slot group.

[0011] In one embodiment, at least part of the magnetic isolation slots are connected to the first magnetic steel slot of one adjacent magnetic steel slot group or the second magnetic steel slot of another adjacent magnetic steel slot group.

[0012] In one embodiment, some of the magnetic isolation grooves are respectively connected to the first magnetic steel groove of one adjacent magnetic steel groove group and the second magnetic steel groove of another adjacent magnetic steel groove group.

[0013] In one embodiment, some of the magnetic isolation slots are spaced apart from the first magnetic steel slot of one adjacent magnetic steel slot group and the second magnetic steel slot of another adjacent magnetic steel slot group.

[0014] In one embodiment, one of the magnetic isolation grooves is connected to the end of a first magnetic steel groove of an adjacent magnetic steel groove group, and another of the magnetic isolation grooves is connected to the groove wall of a second magnetic steel groove of another adjacent magnetic steel groove group.

[0015] In one embodiment, all of the magnetic isolation slots are spaced apart from a first magnetic steel slot of an adjacent magnetic steel slot group and a second magnetic steel slot of another adjacent magnetic steel slot group.

[0016] The utility model also provides a rotor core, comprising the above-mentioned rotor punching sheet.

[0017] The utility model further provides a rotor core, which includes a plurality of rotor punchings, wherein one rotor punching is configured as one of the above-mentioned rotor punchings, and another rotor punching is configured as another of the above-mentioned rotor punchings.

[0018] The utility model also provides a motor, comprising the above-mentioned rotor core.

[0019] The utility model also provides a compressor, comprising the above-mentioned motor.

[0020] The technical solution of the utility model arranges a plurality of magnetic isolation grooves at intervals along the extension direction of the q-axis, thereby weakening the armature magnetic field, thereby achieving the effect of reducing iron loss and improving the efficiency of the motor; at the same time, the design of these magnetic isolation grooves can also reduce the heat generation of the permanent magnet caused by eddy current loss of the permanent magnet, thereby avoiding the possibility of heat demagnetization of the permanent magnet and improving the operating reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 A schematic structural diagram of a first embodiment of a rotor punching provided by the utility model;

[0023] Figure 2 A schematic structural diagram of a second embodiment of a rotor punching provided by the utility model;

[0024] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0025] Figure 4 A schematic structural diagram of a third embodiment of a rotor punching provided by the utility model;

[0026] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0027] Figure 6 A schematic structural diagram of a fourth embodiment of a rotor punching provided by the utility model;

[0028] Figure 7 A schematic structural diagram of a fifth embodiment of a rotor punching provided by the utility model;

[0029] Figure 8 A schematic structural diagram of a sixth embodiment of a rotor punching provided by the utility model;

[0030] Fig. 9 It is a comparison diagram of iron loss between a motor in the prior art and a motor using the rotor punching sheet 1 of the present solution;

[0031] Fig.10 The rotor iron loss changes with H n Schematic diagram of the changes.

[0032] Description of Figure Numbers:

[0033] 1. Rotor punching sheet; 100. Magnetic steel slot group; 110. First magnetic steel slot; 120. Second magnetic steel slot; 200. Magnetic isolation group; 210. Magnetic isolation slot; 300. Rivet hole.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] In order to further improve the efficiency of the motor, the utility model proposes a rotor punching 1.

[0039] See also Figures 1 to 3In one embodiment of the utility model, the rotor punching sheet 1 includes a punching sheet body, and the punching sheet body is provided with a plurality of magnetic steel slot groups 100, and the plurality of magnetic steel slot groups 100 are arranged along the circumferential direction of the punching sheet body, and a magnetic isolation group 200 is provided between two adjacent magnetic steel slot groups 100, and the magnetic isolation group 200 includes a plurality of magnetic isolation grooves 210, and the plurality of magnetic isolation grooves 210 are arranged at intervals along the extension direction of the q-axis.

[0040] It can be understood that the magnetic isolation groove 210 can change the magnetic flux path inside the motor, thereby affecting the distribution of the armature magnetic field. The technical solution of the utility model sets a plurality of magnetic isolation grooves 210 at intervals along the extension direction of the q-axis, thereby weakening the armature magnetic field, thereby achieving the effect of reducing iron loss and thus improving the motor efficiency; at the same time, the design of these magnetic isolation grooves 210 can also reduce the heat generation and temperature rise of the permanent magnet caused by the eddy current loss of the permanent magnet, thereby avoiding the possibility of heat generation and demagnetization of the permanent magnet, and improving the operating reliability of the motor.

[0041] The magnetic isolation groove 210 arranged at the end of the magnetic steel slot group 100 can optimize the magnetic resistance of the rotor magnetic circuit, control the distribution of the magnetic field lines of force, and weaken the concentration of the magnetic field lines of force, thereby reducing the pulsation of the output torque of the motor; the magnetic isolation groove 210 arranged at the end of the magnetic steel slot group 100 can also reduce the reverse magnetic field magnetization intensity of the easily demagnetized part of the motor rotor, thereby protecting the permanent magnets in the magnetic steel slot group 100 from demagnetization.

[0042] Among them, a permanent magnet group is arranged in the magnetic steel slot group 100, and a plurality of magnetic isolation slots 210 are arranged at intervals along the extension direction of the q-axis to assist each other, so that the magnetic field distribution at the end of the permanent magnet group is more optimized, and the pulsation of the motor torque output is further reduced and the anti-demagnetization ability of the permanent magnet group is improved. In addition, by optimizing the design of the plurality of magnetic isolation slots 210, the magnetic field distribution and the hysteresis magnetic field commutation can be effectively constrained without reducing the magnetic field output, thereby reducing the magnetic field change, thereby reducing the pulsation of the motor output torque.

[0043] Further, the magnetic isolation groove 210 extends along the outer periphery of the rotor sheet 1 in the direction from one magnetic steel groove group 100 to another magnetic steel groove group 100, and the edge of the magnetic isolation groove 210 extending along the outer periphery of the rotor sheet 1 has the same curvature as the outer periphery of the rotor sheet 1, that is, the portion of the magnetic isolation groove 210 extending along the outer periphery of the rotor sheet 1 is an arc with the same curvature as the outer periphery of the rotor sheet 1. Of course, the portion of the magnetic isolation groove 210 extending along the outer periphery of the rotor sheet 1 may also have a straight line shape, for example, the extended portion may be roughly rectangular.

[0044] Reference Fig. 9 , Fig. 9 The iron loss comparison diagram of the motor of the prior art and the motor using the rotor punching sheet 1 of this solution is shown in FIG. Fig. 9 It can be seen that the motor using the rotor punching 1 of this solution is conducive to reducing iron loss. Tests have verified that the iron loss of the permanent magnet motor using the rotor punching 1 of the utility model is reduced by 14.7% compared with the permanent magnet motor using the conventional rotor punching 1 under 90Hz working conditions.

[0045] Reference Figure 3 and Figure 5 Furthermore, the minimum slot width of the slot section of the magnetic steel slot group 100 for permanent magnet installation is H m The minimum slot width of each magnetic isolation slot 210 is H n , the H n The range is: 0.4≤H n ≤2*H m ; This scheme will H n The range is limited to 0.4 to 2*H m It is beneficial to reduce the difficulty of machining the rotor punching 1 and reduce the iron loss. n When it is less than 0.4, the processing difficulty will be greatly increased, which is not conducive to processing and manufacturing.

[0046] Reference Fig.10 , Fig.10 The rotor iron loss changes with H n Schematic diagram of the change of Fig.10 It can be seen that when H n When it is less than 0.4mm, as H n The iron loss decreases sharply when H n When it is greater than 0.4, as H n As the iron loss increases, the iron loss decreases gradually and reaches a lower value. n The range is limited to 0.4 to 2*H m It is beneficial to reduce iron loss.

[0047] Optionally, the minimum distance between the magnetic isolation groove 210 and the outer edge of the punch body is D 1 , the D 1 The range is: 0.4≤D 1 ≤2*H m It can be understood that the distance between the magnetic isolation groove 210 and the outer edge of the punch body affects the strength of the rotor punch 1. When D 1 When it is less than 0.4, the solid space between the magnetic isolation groove 210 and the outer edge of the punch body is too small, which will reduce the strength of the punch body. 1 Limited to 0.4 to 2*H m In this way, the strength of the rotor punching sheet 1 can be ensured while the magnetic circuit loop can be effectively optimized, the iron loss can be reduced, and the rotor leakage magnetic flux can be reduced.

[0048] Furthermore, the minimum distance between two adjacent magnetic isolation grooves 210 is D 2 , the D 2 The range is: 0.4≤D 2 ≤2*H m It can be understood that the distance between two adjacent magnetic isolation grooves 210 affects the strength of the rotor punching 1. When D 2 When it is less than 0.4, the entity between the two magnetic isolation grooves 210 is too small, which will reduce the strength of the punching sheet body. 2 Limited to 0.4 to 2*H m In this way, the strength of the rotor punching sheet 1 can be ensured while the magnetic circuit loop can be effectively optimized, the iron loss can be reduced, and the rotor leakage magnetic flux can be reduced.

[0049] Furthermore, the minimum distance between the magnetic isolation slot 210 and the magnetic steel slot group 100 is D 3 , the D 3 The range is: 0.4≤D 3 ≤2*H m It can be understood that the distance between the magnetic isolation slot 210 and the magnetic steel slot group 100 affects the strength of the rotor punching 1. When D 3 When it is less than 0.4, the entity between the magnetic isolation groove 210 and the magnetic steel groove group 100 is too small, which will reduce the strength of the punching sheet body. 3 Limited to 0.4 to 2*H m In this way, the strength of the rotor punching sheet 1 can be ensured while the magnetic circuit loop can be effectively optimized, the iron loss can be reduced, and the rotor leakage magnetic flux can be reduced.

[0050] Furthermore, the punch body is further provided with a rivet hole 300, the rivet hole 300 is located on the q axis and between the magnetic isolation group 200 and the center of the punch body, and the minimum distance between the magnetic isolation groove 210 and the rivet hole 300 is D 4 , the D 4 The range is: 2≤D 4 ≤3*H m It can be understood that the rivet hole 300 is used for the rivet to pass through to fasten the plurality of rotor punchings 1, and the distance between the magnetic isolation groove 210 and the rivet hole 300 affects the strength of the rotor punching 1. 4 When it is less than 0.4, the solid space between the magnetic isolation groove 210 and the rivet hole 300 is too small, which will reduce the strength of the punching sheet. 4 Limiting it to between 0.4 and 3*Hm can ensure the strength of the rotor punching sheet 1 while effectively optimizing the magnetic circuit loop, reducing iron loss and reducing rotor leakage.

[0051] It should be noted that D 4 , D 3 , D2 , D 1 , H m and H n The unit is mm.

[0052] Optionally, the magnetic steel slot group 100 includes a first magnetic steel slot 110 and a second magnetic steel slot 120, and the first magnetic steel slot 110 and the second magnetic steel slot 120 extend toward the outer circumferential surface of the punching sheet body respectively, and at least one magnetic isolation slot 210 is spaced apart from the first magnetic steel slot 110 of an adjacent magnetic steel slot group 100 or the second magnetic steel slot 120 of another magnetic steel slot group 100; it can be understood that at least one magnetic isolation slot 210 is spaced apart from the first magnetic steel slot 110 of an adjacent magnetic steel slot group 100, or is spaced apart from the second magnetic steel slot 120 of another adjacent magnetic steel slot group 100, so as to ensure that there is a physical connection between the magnetic isolation slot 210 and the two adjacent magnetic steel slot groups 100, thereby ensuring the stiffness of the rotor punching sheet 1.

[0053] Reference Figure 1 , Figure 2 and Figure 7 Further, in the first embodiment, at least part of the magnetic isolation slots 210 are connected to the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 or the second magnetic steel slots 120 of another adjacent magnetic steel slot group 100. It can be understood that this can reduce the iron loss while ensuring the strength of the rotor punching 1.

[0054] Specifically, a magnetic isolation group 200 is provided on the punching sheet body, and all the magnetic isolation grooves 210 in the magnetic isolation group are respectively connected with the first magnetic steel groove 110 of an adjacent magnetic steel groove group 100 or the second magnetic steel groove 120 of another magnetic steel groove group 100, that is, the same magnetic isolation groove 210 can only be connected with the first magnetic steel groove 110 of an adjacent magnetic steel groove group 100 or the second magnetic steel groove 120 of another magnetic steel groove group 100.

[0055] Reference Figure 6 In the second embodiment, part of the magnetic isolation grooves 210 are respectively connected to the first magnetic steel groove 110 of one adjacent magnetic steel groove group 100 and the second magnetic steel groove 120 of another adjacent magnetic steel groove group 100. It can be understood that this can effectively optimize the magnetic circuit loop and reduce iron loss.

[0056] Specifically, a magnetic isolation group 200 is provided on the same punching sheet body. In the magnetic isolation group 200, some of the magnetic isolation grooves 210 are respectively connected with the first magnetic steel groove 110 of an adjacent magnetic steel groove group 100 and the second magnetic steel groove 120 of another magnetic steel groove group 100, and some of the magnetic isolation grooves 210 are connected with the first magnetic steel groove 110 of an adjacent magnetic steel groove group 100 or the second magnetic steel groove 120 of another magnetic steel groove group 100.

[0057] On the same punching sheet body, at least two types of magnetic isolation groups 200 are included. In one type of magnetic isolation group 200, some of the magnetic isolation slots 210 are respectively connected with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of another magnetic steel slot group 100, and some of the magnetic isolation slots 210 are connected with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 or the second magnetic steel slots 120 of another magnetic steel slot group 100. In another type of magnetic isolation group 200, all of the magnetic isolation slots 210 are respectively connected with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 or the second magnetic steel slots 120 of another magnetic steel slot group 100. The two types of magnetic isolation groups 200 are alternately arranged along the circumferential direction of the rotor punching sheet 1, or one type of magnetic isolation group 200 is arranged first along the circumferential direction of the rotor punching sheet and then the other type of magnetic isolation group 200 is arranged.

[0058] Reference Figure 4 and Figure 5 In the third embodiment, part of the magnetic isolation slots 210 are spaced apart from the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of another adjacent magnetic steel slot group 100, so that the iron loss can be reduced while ensuring the strength of the rotor punching 1.

[0059] Specifically, a magnetic isolation group 200 is included on the same punching sheet body, in which at least part of the magnetic isolation slots 210 are spaced apart from the first magnetic steel slot 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slot 120 of another adjacent magnetic steel slot group 100 .

[0060] At least two types of magnetic isolation groups 200 are included on the same punching sheet body. In one magnetic isolation group 200, all the magnetic isolation slots 210 are arranged at intervals with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of another magnetic steel slot group 100. In another magnetic isolation group 200, some of the magnetic isolation slots 210 are connected with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 or the second magnetic steel slots 120 of another magnetic steel slot group 100, and some of the magnetic isolation slots 210 are arranged at intervals with the first magnetic steel slots 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of another magnetic steel slot group 100. The two types of magnetic isolation groups 200 are arranged alternately along the circumferential direction of the rotor punching sheet 1, or one type of magnetic isolation group 200 is arranged first along the circumferential direction of the rotor punching sheet and then the other type of magnetic isolation group 200 is arranged.

[0061] Reference Figure 7 In the fourth embodiment, all of the magnetic isolation slots 210 are spaced apart from the first magnetic steel slot 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slot 120 of another adjacent magnetic steel slot group 100, so that the iron loss can be reduced while ensuring the strength of the rotor punching 1.

[0062] Furthermore, one magnetic isolation groove 210 is connected to the end of the first magnetic steel groove 110 of an adjacent magnetic steel groove group 100, and another magnetic isolation groove 210 is connected to the groove wall of the second magnetic steel groove 120 of another adjacent magnetic steel groove group 100.

[0063] Optionally, the widths of any two magnetic isolation grooves 210 are equal; or, the widths of any two magnetic isolation grooves 210 are unequal.

[0064] The utility model also proposes a rotor core, which includes rotor punchings. The specific structure of the rotor punchings refers to the above-mentioned embodiments. Since the rotor core adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0065] The rotor punching sheet adopts any one of the above-mentioned rotor punching sheets, and a plurality of the rotor punching sheets are provided, and the plurality of rotor punching sheets are stacked along the axial direction of the rotor core.

[0066] The utility model also proposes a rotor core, which includes multiple rotor punchings, wherein one rotor punching is configured as one of the above-mentioned rotor punchings, and the other rotor punching is configured as the other of the above-mentioned rotor punchings, and the two types of punchings are stacked along the axial direction of the rotor core.

[0067] It should be noted that the specific structures of the various rotor punchings are different. When the rotor core includes three rotor punchings 1, for example but not limited to, at least two magnetic isolation groups 200 are provided on one of the rotor punchings. In one magnetic isolation group 200, all the magnetic isolation slots 210 are spaced apart from the first magnetic steel slot 110 of one adjacent magnetic steel slot group 100 and the second magnetic steel slot 120 of another adjacent magnetic steel slot group 100. In another magnetic isolation group 200, some of the magnetic isolation slots 210 are connected with the first magnetic steel slots 110 of the adjacent magnetic steel slot group 100 or the second magnetic steel slots 120 of the other magnetic steel slot group 100, and some of the magnetic isolation slots 210 are arranged at intervals with the first magnetic steel slots 110 of the adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of the other magnetic steel slot group 100. The two magnetic isolation groups 200 are arranged alternately along the circumferential direction of the rotor punching 1, or one magnetic isolation group 200 is arranged along the circumferential direction of the rotor punching first and then the other magnetic isolation group 200. Only one magnetic isolation group 200 is arranged on another rotor punching, and all the magnetic isolation slots 210 are arranged at intervals with the first magnetic steel slots 110 of the adjacent magnetic steel slot group 100 and the second magnetic steel slots 120 of the other magnetic steel slot group 100. However, only one magnetic isolation group 200 is provided on another rotor punching. In the magnetic isolation group 200, some of the magnetic isolation grooves 210 are respectively connected with the first magnetic steel slot 110 of an adjacent magnetic steel slot group 100 and the second magnetic steel slot 120 of another magnetic steel slot group 100, and some of the magnetic isolation grooves 210 are connected with the first magnetic steel slot 110 of an adjacent magnetic steel slot group 100 or the second magnetic steel slot 120 of another magnetic steel slot group 100. These three types of rotor punchings 1 are stacked along the axial direction of the rotor core. The specific forms of the various rotor punchings 1 in the rotor core are not limited herein.

[0068] Optionally, multiple rotor punchings 1 are alternately arranged along the axial direction of the rotor core; or one rotor punching is stacked first and then another rotor punching is stacked along the axial direction of the rotor core; or, multiple rotor punchings are irregularly stacked along the axial direction of the rotor core.

[0069] The utility model also proposes a motor, which includes a rotor core. The specific structure of the rotor core refers to the above embodiments. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0070] The utility model also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0071] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotor punching, characterized in that: It includes a punching sheet body, which is provided with a plurality of magnetic steel slot groups, which are arranged along the circumference of the punching sheet body, and a magnetic isolation group is provided between two adjacent magnetic steel slot groups, wherein the magnetic isolation group includes a plurality of magnetic isolation grooves, and the plurality of magnetic isolation grooves are arranged at intervals along the extension direction of the q-axis.

2. The rotor punching according to claim 1, characterized in that: The minimum slot width of the slot section of the magnetic steel slot group for permanent magnet installation is H m The minimum width of each magnetic isolation groove is H n , the H n The range is: 0.4≤H n ≤2*H m .

3. The rotor punching according to claim 2, characterized in that: The minimum distance between the magnetic isolation groove and the outer edge of the punch body is D1, and the range of D1 is: 0.4≤D1≤2*H m .

4. The rotor punching according to claim 2, characterized in that: The minimum distance between two adjacent magnetic isolation grooves is D2, and the range of D2 is: 0.4≤D2≤2*H m .

5. The rotor punching according to claim 2, characterized in that: The minimum distance between the magnetic isolation slot and the magnetic steel slot group is D3, and the range of D3 is: 0.4≤D3≤2*H m .

6. The rotor punching according to claim 2, characterized in that: The punch body is also provided with a rivet hole, which is located on the q axis and between the magnetic isolation group and the center of the punch body. The minimum distance between the magnetic isolation groove and the rivet hole is D4, and the range of D4 is: 2≤D4≤3*H m .

7. The rotor punching according to claim 2, characterized in that: The magnetic steel slot group includes a first magnetic steel slot and a second magnetic steel slot, wherein the first magnetic steel slot and the second magnetic steel slot respectively extend toward the outer peripheral surface of the punching sheet body, and at least one magnetic isolation slot is spaced apart from the first magnetic steel slot of an adjacent magnetic steel slot group or the second magnetic steel slot of another adjacent magnetic steel slot group.

8. The rotor punching according to claim 7, characterized in that: At least part of the magnetic isolation slots is communicated with the first magnetic steel slot of an adjacent magnetic steel slot group or the second magnetic steel slot of another adjacent magnetic steel slot group.

9. The rotor punching according to claim 8, characterized in that: Some of the magnetic isolation grooves are respectively connected to the first magnetic steel groove of one adjacent magnetic steel groove group and the second magnetic steel groove of another adjacent magnetic steel groove group.

10. The rotor punching according to claim 8, characterized in that: Some of the magnetic isolation grooves are spaced apart from the first magnetic steel groove of one adjacent magnetic steel groove group and the second magnetic steel groove of another adjacent magnetic steel groove group.

11. The rotor punching according to claim 7, characterized in that: All the magnetic isolation slots are spaced apart from the first magnetic steel slot of one adjacent magnetic steel slot group and the second magnetic steel slot of another adjacent magnetic steel slot group.

12. A rotor core, characterized in that: Comprising a rotor punching sheet as claimed in any one of claims 1 to 11.

13. A rotor core, characterized in that: The rotor core includes a plurality of rotor punchings, wherein the plurality of rotor punchings are configured as at least two of the rotor punchings according to any one of claims 8 to 11, and the plurality of rotor punchings are stacked along the axial direction of the rotor core.

14. A motor, characterized in that: Comprising the rotor core as claimed in claim 12 or 13.

15. A compressor, characterized in that: Comprising the motor as claimed in claim 14.

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