Rotor structure, motor and air conditioner

Abstract

The present invention provides a rotor structure, a motor, and an air conditioner. The rotor structure includes a plurality of sequentially stacked rotor plates, each of which is provided with a first deweighting slot. The first deweighting slot includes a main slot body and a sub-slot body that are interconnected. The sub-slot body is provided on a side of the main slot body away from the centerline of the rotor plate. The projection of the sub-slot body on a plane parallel to the rotor plate is the sub-slot body projection, and the projection of the main slot body on the projection plane is the main slot body projection. With the circumferential direction of the rotor plate as the length direction, the length of the connecting edge of the sub-slot body projection for connecting to the main slot body projection is less than the length of the connecting edge of the main slot body projection for connecting to the sub-slot body projection. The present invention solves the problem of heavy rotor weight in conventional motors.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and in particular to a rotor structure, a motor and an air conditioner. Background Art

[0002] New energy vehicles are developing rapidly. The core of electric vehicles is the so-called "three-electric system," namely the battery, the electronic control motor, and the drive motor. Among them, the drive motor directly affects the power performance and endurance of electric vehicles.

[0003] Currently, the mainstream drive motor solution for new energy electric vehicles has shifted from asynchronous motors to permanent magnet synchronous motors. Permanent magnet synchronous motors offer advantages such as a wide speed range, high power density, high efficiency, and ease of control, making them a popular choice for most new energy electric vehicles.

[0004] The rotor topology of an interior permanent magnet synchronous motor (IPMS) significantly impacts motor performance. Compared to surface-mount motors, IPMMS utilize the permanent magnets more efficiently, offer a wider constant power-speed range, and provide greater rotor design flexibility. Therefore, optimizing the IPMMS's rotor topology can improve overload capacity, efficiency, power density, and speed regulation.

[0005] New energy vehicles demand high power density and high torque from permanent magnet synchronous motors, which can be achieved not only from an electromagnetic design perspective but also through structural topology optimization. Lightweight motor design is gaining increasing attention. From a cost-effective perspective, reducing rotor weight reduces material consumption, and the material removed from punching and cutting can be recycled. Objectively, lightweighting the core can reduce costs. From a rotor structural perspective, reducing rotor core weight reduces its moment of inertia, making it easier to control. Reducing overall motor weight increases motor power density, extending the range of new energy vehicles, and improving torque ripple and NVH characteristics.

[0006] Existing rotor core weight-reducing slot designs, while meeting strength requirements within the design speed and torque range, are conservative weight-reduction solutions. The motor's large rotor moment of inertia can cause starting and braking lag, complicating control and commissioning. Furthermore, the rotor core uses more material, increasing motor costs and failing to align with the trend toward lightweight motor design. Summary of the Invention

[0007] The main purpose of the present invention is to provide a rotor structure, a motor and an air conditioner to solve the problem of heavy rotor weight of the motor in the prior art.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a rotor structure is provided, comprising a plurality of rotor plates stacked in sequence, each rotor plate being provided with a first deweighting groove, the first deweighting groove comprising a main groove body and a sub-groove body which are interconnected, the sub-groove body being provided on a side of the main groove body away from the center line of the rotor plate; wherein, taking a plane parallel to the rotor plate as a projection plane, the projection of the sub-groove body on the projection plane is the sub-groove body projection, and the projection of the main groove body on the projection plane is the main groove body projection; taking the circumferential direction of the rotor plate as the length direction, the length of the connecting side of the sub-groove body projection for connecting with the main groove body projection is less than the length of the connecting side of the main groove body projection for connecting with the sub-groove body projection.

[0009] Furthermore, the length of the sub-slot body along the circumferential direction of the rotor plate gradually decreases in the direction away from the center line of the rotor plate; and / or the length of at least part of the main slot body along the circumferential direction of the rotor plate gradually decreases in the direction close to the center line of the rotor plate; and / or the sub-slot body is projected into a polygonal structure; and / or the main slot body is projected into a polygonal structure.

[0010] Furthermore, the projection of the sub-slot body includes a first sub-slot edge and a second sub-slot edge. The first sub-slot edge and the second sub-slot edge are arranged opposite to each other, and the first sub-slot edge is located on the side of the second sub-slot edge away from the projection of the main slot body; the length of the second sub-slot edge is greater than the length of the first sub-slot edge, and the second sub-slot edge is connected to the projection of the main slot body.

[0011] Furthermore, the projection of the slot body also includes a third slot edge and a fourth slot edge, and the length L5 of the first slot edge ranges from 14mm to 17mm; and / or a first transition fillet is formed between the first slot edge and the third slot edge and / or the fourth slot edge, and the radius R1 of the first transition fillet ranges from 3mm to 5mm.

[0012] Furthermore, the projection of the slot body also includes a third slot edge and a fourth slot edge, the third slot edge and the fourth slot edge are arranged opposite to each other, the two ends of the third slot edge are respectively connected to the first end of the first slot edge and the first end of the second slot edge, and the two ends of the fourth slot edge are respectively connected to the second end of the first slot edge and the second end of the second slot edge.

[0013] Furthermore, the projection of the main groove body has a first main groove section for connecting to the second sub-groove edge, and the angle θ4 between the first main groove section and the third sub-groove edge and / or the fourth sub-groove edge is in the range of 120° to 150°; and / or a second transition fillet is formed between the first main groove section and the third sub-groove edge and / or the fourth sub-groove edge, and the radius R2 of the second transition fillet is in the range of 4mm to 6mm.

[0014] Furthermore, each rotor plate is provided with a plurality of magnetic steel slots, and the plurality of magnetic steel slots constitute a plurality of pairs of magnetic steel slot groups. Each magnetic steel slot group includes two magnetic steel slots, and the two magnetic steel slots in each magnetic steel slot group are arranged in a V-shaped structure, and a spacing area is formed between two adjacent V-shaped structures; wherein, the sub-slot body and the spacing area are arranged correspondingly along the radial direction of the rotor plate, and / or at least part of the sub-slot body is located on the spacing area; and / or a first fastening hole for allowing a first fastener to pass through is provided in the spacing area.

[0015] Furthermore, the main slot body includes a first main slot segment and a second main slot segment arranged along the radial direction of the rotor plate, the first main slot segment is located on the side of the second main slot segment away from the center line of the rotor plate and is connected to the sub-slot body; wherein, the first main slot segment includes a first side wall and a second side wall arranged opposite to each other, the second main slot segment includes a third side wall and a fourth side wall, the first side wall is connected to the third side wall and is inclined to each other, and the second side wall is connected to the fourth side wall and is inclined to each other.

[0016] Furthermore, the first side wall and / or the second side wall include an inclined wall section for connecting to the second main slot section, the inclined wall section is inclined to the radial line of the rotor plate, and the length L4 of the inclined wall section ranges from 11 mm to 13 mm; and / or the length L3 of the planar section of the third side wall and / or the fourth side wall ranges from 21 mm to 25 mm; and / or the first main slot section has a first main slot wall for connecting to the sub-slot body, and a third transition fillet R3 is provided between the first main slot wall and the first side wall and / or the second side wall, and the radius R3 of the third transition fillet ranges from 3 mm to 5 mm.

[0017] Furthermore, the angle θ1 between the inclined wall segment and the extension line of the third side wall is in the range of 13° to 14°; and / or the angle between the inclined wall segment and the extension line of the fourth side wall is in the range of 13° to 14°; and / or the angle between the inclined wall segment and the third side wall is equal to the angle between the inclined wall segment and the fourth side wall.

[0018] Furthermore, there are multiple first de-weighting grooves, and the multiple first de-weighting grooves are distributed at intervals along the circumference of the rotor plate; in two adjacent first de-weighting grooves, the minimum distance L2 between the first main groove sections of the two first de-weighting grooves ranges from 5mm to 8mm.

[0019] Furthermore, there are multiple first deweighting grooves, and the multiple first deweighting grooves are distributed at intervals along the circumference of the rotor plate; the end wall of at least one main groove body of the multiple first deweighting grooves close to the center line of the rotor plate includes an arcuate wall segment, and a second fastening hole for the first fastener to pass through is provided on the rotor plate, and the arcuate wall segment is arranged around the second fastening hole.

[0020] Furthermore, the radius R10 of the arc-shaped wall segment ranges from 4mm to 6mm; and / or a fourth transition fillet and a fifth transition fillet are sequentially arranged between the side wall of the main trough body and the arc-shaped wall segment, the fourth transition fillet is connected to the side wall of the main trough body, and the fifth transition fillet is connected to the arc-shaped wall segment; the radius R4 of the fourth transition fillet ranges from 4mm to 6mm, and the radius R5 of the fifth transition fillet ranges from 0.5mm to 2mm.

[0021] Furthermore, there are multiple first deweighting grooves, and the multiple first deweighting grooves are distributed at intervals along the circumference of the rotor plate; the end wall of at least one main groove body among the multiple first deweighting grooves close to the center line of the rotor plate is a plane end wall, and a sixth transition fillet is provided between the plane end wall and the side wall of the main groove body, and the radius R6 of the sixth transition fillet ranges from 4mm to 6mm.

[0022] Furthermore, there are multiple first deweighting grooves, which are spaced apart along the circumference of the rotor plate; each rotor plate is provided with a second deweighting groove, which is provided between two adjacent first deweighting grooves.

[0023] Furthermore, there are multiple second de-duplication grooves, and at least one second de-duplication groove is provided between any two adjacent first de-duplication grooves.

[0024] Furthermore, there are multiple second deduplication grooves, multiple deduplication areas are formed between the multiple first deduplication grooves, and the multiple second deduplication grooves are arranged in a one-to-one correspondence with the multiple deduplication areas.

[0025] Furthermore, along the radial direction of the rotor plate and in the direction close to the center line of the rotor plate, the second deweighting groove includes a first groove segment and a second groove segment connected in sequence; wherein, along the radial direction of the rotor plate and in the direction close to the center line of the rotor plate, the width of the second groove segment along the circumferential direction of the rotor plate gradually decreases.

[0026] Furthermore, along the radial direction of the rotor plate and in a direction close to the center line of the rotor plate, the width of the first slot segment along the circumferential direction of the rotor plate gradually increases.

[0027] Furthermore, a deweighting area is formed between two adjacent first deweighting grooves, the deweighting area includes two parallel deweighting side edges, and at least a portion of the second groove body section is located between the two deweighting side edges.

[0028] Furthermore, the spacing L1 between the two deweighting sides ranges from 10 mm to 16 mm; and / or the second deweighting groove has a groove body centerline along the radial direction of the rotor plate, and the groove body centerline coincides with a radial direction of the rotor plate.

[0029] Furthermore, the second deweighting slot has a slot body centerline along the radial direction of the rotor plate, the slot body centerline is parallel to the deweighting side edge; and / or the two deweighting side edges are symmetrically arranged relative to the slot body centerline.

[0030] Furthermore, the angle θ2 between the two side walls of the first trough segment is in the range of 28° to 30°; and / or the angle θ3 between the two side walls of the second trough segment is in the range of 4° to 5°.

[0031] According to a second aspect of the present invention, a motor is provided, comprising a rotor structure and a stator structure that cooperate with each other, wherein the rotor structure is the above-mentioned rotor structure.

[0032] According to a third aspect of the present invention, an air conditioner is provided, comprising a motor, which is the motor described above.

[0033] Applying the technical solution of the present invention, the rotor structure of the present invention includes a plurality of rotor plates stacked in sequence, each rotor plate is provided with a first deweighting groove, the first deweighting groove includes a main groove body and a sub-groove body that are interconnected, and the sub-groove body is arranged on the side of the main groove body away from the center line of the rotor plate; wherein, taking the plane parallel to the rotor plate as the projection plane, the projection of the sub-groove body on the projection plane is the sub-groove body projection, and the projection of the main groove body on the projection plane is the main groove body projection; taking the circumferential direction of the rotor plate as the length direction, the length of the connecting edge of the sub-groove body projection for connecting with the main groove body projection is less than the length of the connecting edge of the main groove body projection for connecting with the sub-groove body projection. The rotor structure of the present invention is formed by stacking a plurality of rotor plates, each rotor plate has a first deweighting groove, and each rotor plate is stacked so that the first deweighting groove on each rotor plate forms a deweighting groove cavity, and the area of ​​the deweighting groove is increased, thereby effectively reducing the weight of the rotor structure and improving the power density of the rotor structure. In addition, the area of ​​the deweighting groove in contact with the air is increased, which is conducive to dissipating the heat generated by the rotor due to hysteresis loss and eddy current loss of the magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 It shows a schematic diagram of the overall structure of an embodiment of a rotor structure according to the present invention;

[0036] Figure 2 Shown according to Figure 1 A side view of the rotor structure in FIG;

[0037] Figure 3 Shown according to Figure 2 The first partial enlarged schematic diagram of the rotor structure in FIG;

[0038] Figure 4 Shown according to Figure 2 A second partial enlarged schematic diagram of the rotor structure in .

[0039] The above drawings include the following reference numerals:

[0040] 10. Rotor plate; 11. Radial line; 12. Rotor core; 100. Second fastening hole; 20. First de-weighting slot; 200. De-weighting area; 201. De-weighting side; 21. Main slot body; 22. Sub-slot body; 220. Sub-slot body projection; 221. First sub-slot side; 222. Second sub-slot side; 223. Third sub-slot side; 224. Fourth sub-slot side; 210. Main slot body projection; 211. First main slot segment; 212. Second main slot segment. 2110, first main slot wall; 2111, first side wall; 2112, second side wall; 2113, inclined wall section; 2121, third side wall; 2122, fourth side wall; 213, arcuate wall section; 214, plane end wall; 30, magnetic steel slot; 31, magnetic steel; 3, magnetic steel slot group; 300, spacing area; 301, first fastening hole; 40, second deweighting slot; 41, first slot body section; 42, second slot body section; 43, slot body centerline. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Please refer to Figures 1 to 4 The present invention provides a rotor structure, comprising a plurality of rotor plates 10 stacked in sequence, each rotor plate 10 being provided with a first deweighting groove 20, the first deweighting groove 20 comprising a main groove body 21 and a sub-groove body 22 which are interconnected, the sub-groove body 22 being provided on a side of the main groove body 21 away from the center line of the rotor plate 10; wherein, taking a plane parallel to the rotor plate 10 as a projection plane, the projection of the sub-groove body 22 on the projection plane is the sub-groove body projection 220, and the projection of the main groove body 21 on the projection plane is the main groove body projection 210; taking the circumferential direction of the rotor plate 10 as the length direction, the length of the connecting side of the sub-groove body projection 220 for connecting with the main groove body projection 210 is less than the length of the connecting side of the main groove body projection 210 for connecting with the sub-groove body projection 220.

[0043] The rotor structure of the present invention includes a plurality of rotor plates 10 stacked in sequence, each of which is provided with a first deweighting groove 20. The first deweighting groove 20 includes a main groove body 21 and a sub-groove body 22 that are interconnected. The sub-groove body 22 is provided on a side of the main groove body 21 away from the center line of the rotor plate 10. The projection plane is parallel to the rotor plate 10, and the projection of the sub-groove body 22 on the projection plane is the sub-groove body projection 220. The projection of the main groove body 21 on the projection plane is the main groove body projection 210. The circumferential direction of the rotor plate 10 is the length direction, and the sub-groove body projection 220 is used to align with the main groove body projection. The length of the connecting edge of the projection 210 is smaller than the length of the connecting edge of the main slot body projection 210 used to connect with the sub-slot body projection 220. The rotor structure of the present invention is composed of a plurality of rotor plates 10 stacked together, and each rotor plate 10 has a first deweighting groove 20. The rotor plates 10 are stacked so that the first deweighting groove 20 on each rotor plate 10 forms a deweighting groove cavity. The area of ​​the deweighting groove is increased, thereby effectively reducing the weight of the rotor structure and improving the power density of the rotor structure. In addition, the area of ​​the deweighting groove in contact with the air is increased, which is conducive to dissipating the heat generated by the rotor due to hysteresis loss and eddy current loss of the magnetic steel.

[0044] Specifically, the length of the sub-slot body 22 along the circumferential direction of the rotor plate 10 gradually decreases in the direction away from the center line of the rotor plate 10; and / or the length of at least part of the main slot body 21 along the circumferential direction of the rotor plate 10 gradually decreases in the direction close to the center line of the rotor plate 10; and / or the sub-slot body projection 220 is a polygonal structure; and / or the main slot body projection 210 is a polygonal structure.

[0045] like Figure 3 As shown, the sub-slot body projection 220 includes a first sub-slot edge 221 and a second sub-slot edge 222. The first sub-slot edge 221 and the second sub-slot edge 222 are arranged opposite to each other, and the first sub-slot edge 221 is located on the side of the second sub-slot edge 222 away from the main slot body projection 210; the length of the second sub-slot edge 222 is greater than the length of the first sub-slot edge 221, and the second sub-slot edge 222 is connected to the main slot body projection 210.

[0046] Optionally, the slot body projection 220 also includes a third slot edge 223 and a fourth slot edge 224, and the length L5 of the first slot edge 221 ranges from 14 mm to 17 mm; and / or a first transition fillet is formed between the first slot edge 221 and the third slot edge 223 and / or the fourth slot edge 224, and the radius R1 of the first transition fillet ranges from 3 mm to 5 mm.

[0047] Preferably, the length L5 of the first groove edge 221 is 15.5 mm, and the radius R1 of the first transition fillet is 4 mm.

[0048] Specifically, the slot body projection 220 also includes a third slot edge 223 and a fourth slot edge 224. The third slot edge 223 and the fourth slot edge 224 are arranged opposite to each other, and the two ends of the third slot edge 223 are respectively connected to the first end of the first slot edge 221 and the first end of the second slot edge 222, and the two ends of the fourth slot edge 224 are respectively connected to the second end of the first slot edge 221 and the second end of the second slot edge 222.

[0049] like Figure 3 and Figure 4 As shown, the main groove body projection 210 has a first main groove section 211 for connecting to the second sub-groove edge 222, and the angle θ4 between the first main groove section 211 and the third sub-groove edge 223 or the fourth sub-groove edge 224 is in the range of 120° to 150°; and / or a second transition fillet is formed between the first main groove section 211 and the third sub-groove edge 223 and / or the fourth sub-groove edge 224, and the radius R2 of the second transition fillet is in the range of 4mm to 6mm.

[0050] Preferably, the included angle θ4 between the first main groove section 211 and the third sub-groove edge 223 and / or the fourth sub-groove edge 224 is 130°, and the radius R2 of the second transition fillet is 5 mm.

[0051] In the embodiment of the present invention, the distance R17 between the connection between the main slot body 21 and the sub-slot body 22 and the intersection of the center line and the radial line 11 of the rotor plate 10 ranges from 202 mm to 210 mm.

[0052] Preferably, R17 is 206 mm. R17 is the positioning dimension of the first deweighting groove 20.

[0053] Specifically, each rotor plate 10 is provided with a plurality of magnetic steel slots 30, and the plurality of magnetic steel slots 30 constitute a plurality of pairs of magnetic steel slot groups 3. Each magnetic steel slot group 3 includes two magnetic steel slots 30. The two magnetic steel slots 30 in each magnetic steel slot group 3 are arranged in a V-shaped structure. A spacing area 300 is formed between two adjacent V-shaped structures, so that the electromagnetic waves of the two adjacent magnetic steel slot groups 3 are separated by the spacing area 300, so as to weaken the torque pulsation of the motor and achieve the purpose of reducing the motor harmonics.

[0054] The slot body 22 and the spacing area 300 are arranged correspondingly along the radial direction of the rotor plate 10, and / or at least part of the slot body 22 is located on the spacing area 300; and / or a first fastening hole 301 for a first fastener to pass through is provided in the spacing area 300.

[0055] In an embodiment of the present invention, the first fastening hole 301 is circular, and a distance R18 between the center of the first fastening hole 301 and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 226 mm to 234 mm.

[0056] Preferably, R18 is 230 mm.

[0057] Specifically, a plurality of magnetic steels 31 are provided on the rotor plate 10 . The magnetic steels 31 are arranged in the magnetic steel slots 30 , and the plurality of magnetic steels 31 are arranged in a one-to-one correspondence with the plurality of magnetic steel slots 30 .

[0058] In an embodiment of the present invention, the main slot body 21 includes a first main slot segment 211 and a second main slot segment 212 arranged along the radial direction of the rotor plate 10. The first main slot segment 211 is located on the side of the second main slot segment 212 away from the center line of the rotor plate 10 and is connected to the sub-slot body 22; wherein, the first main slot segment 211 includes a first side wall 2111 and a second side wall 2112 arranged opposite to each other, and the second main slot segment 212 includes a third side wall 2121 and a fourth side wall 2122. The first side wall 2111 is connected to the third side wall 2121 and is inclined to each other, and the second side wall 2112 is connected to the fourth side wall 2122 and is inclined to each other.

[0059] Optionally, the first side wall 2111 and / or the second side wall 2112 include an inclined wall section 2113 for connecting to the second main slot section 212, the inclined wall section 2113 is inclined to the radial line 11 of the rotor plate 10, and the length L4 of the inclined wall section 2113 is in the range of 11 mm to 13 mm; and / or the length L3 of the planar section of the third side wall 2121 and / or the fourth side wall 2122 is in the range of 21 mm to 25 mm; and / or the first main slot section 211 has a first main slot wall 2110 for connecting to the sub-slot body 22, and a third transition radius R3 is provided between the first main slot wall 2110 and the first side wall 2111 and / or the second side wall 2112, and the third transition radius R3 is in the range of 3 mm to 5 mm.

[0060] Preferably, the length L4 of the inclined wall section 2113 is 12 mm, the length L3 of the plane section of the third side wall 2121 and / or the fourth side wall 2122 is 23.5 mm, and the third transition radius R3 is 4 mm.

[0061] Optionally, the angle θ1 between the inclined wall section 2113 and the extension line of the third side wall 2121 is in the range of 13° to 14°; and / or the angle between the inclined wall section 2113 and the extension line of the fourth side wall 2122 is in the range of 13° to 14°; and / or the angle between the inclined wall section 2113 and the third side wall 2121 is equal to the angle between the inclined wall section 2113 and the fourth side wall 2122.

[0062] Preferably, the angle θ1 is 13.5°.

[0063] Specifically, there are multiple first deweighting grooves 20, and the multiple first deweighting grooves 20 are distributed at intervals along the circumference of the rotor plate 10; in two adjacent first deweighting grooves 20, the minimum distance L2 between the first main groove sections 211 of the two first deweighting grooves 20 ranges from 5 mm to 8 mm.

[0064] Preferably, the minimum distance L2 between the first main groove sections 211 of the two first deweighting grooves 20 is 5.5 mm.

[0065] Specifically, there are multiple first deweighting grooves 20, and the multiple first deweighting grooves 20 are distributed at intervals along the circumference of the rotor plate 10; the end wall of at least one main groove body 21 of the multiple first deweighting grooves 20 close to the center line of the rotor plate 10 includes an arcuate wall section 213, and a second fastening hole 100 for a first fastener to pass through is provided on the rotor plate 10, and the arcuate wall section 213 is arranged around the second fastening hole 100.

[0066] In an embodiment of the present invention, the second fastening hole 100 is circular, and a distance R13 between the center of the second fastening hole 100 and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 107 mm to 114 mm.

[0067] Preferably, R13 is 110 mm. Optionally, the radius R10 of the curved wall segment 213 ranges from 4 mm to 6 mm; and / or a fourth transition fillet and a fifth transition fillet are sequentially provided between the sidewall of the main tank body 21 and the curved wall segment 213, with the fourth transition fillet connected to the sidewall of the main tank body 21 and the fifth transition fillet connected to the curved wall segment 213; the radius R4 of the fourth transition fillet ranges from 4 mm to 6 mm, and the radius R5 of the fifth transition fillet ranges from 0.5 mm to 2 mm.

[0068] Preferably, the radius R10 of the arc-shaped wall segment 213 is 5 mm, the radius R4 of the fourth transition fillet is 5 mm, and the radius R5 of the fifth transition fillet is 1 mm.

[0069] like Figure 3 As shown, the minimum distance R12 between one end of the arc-shaped wall section 213 of the first deweighting groove 20 close to the center line of the rotor plate 10 and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 104 mm to 110 mm.

[0070] Preferably, R12 is 107.5 mm.

[0071] Optionally, there are multiple first deweighting grooves 20, and the multiple first deweighting grooves 20 are distributed at intervals along the circumference of the rotor plate 10; the end wall of at least one main groove body 21 among the multiple first deweighting grooves 20 close to the center line of the rotor plate 10 is a plane end wall 214, and a sixth transition fillet is provided between the plane end wall 214 and the side wall of the main groove body 21, and the radius R6 of the sixth transition fillet ranges from 4 mm to 6 mm.

[0072] Preferably, the radius R6 of the sixth transition fillet is 5 mm.

[0073] Specifically, there are multiple first deweighting grooves 20, which are distributed at intervals along the circumference of the rotor plate 10; each rotor plate 10 is provided with a second deweighting groove 40, which is arranged between two adjacent first deweighting grooves 20.

[0074] Specifically, there are a plurality of second de-weighting grooves 40 , and at least one second de-weighting groove 40 is provided between any two adjacent first de-weighting grooves 20 .

[0075] Specifically, there are multiple second de-duplication grooves 40 , and multiple de-duplication areas 200 are formed between the multiple first de-duplication grooves 20 . The multiple second de-duplication grooves 40 are arranged in the multiple de-duplication areas 200 in a one-to-one correspondence.

[0076] In an embodiment of the present invention, along the radial direction of the rotor plate 10 and in the direction close to the center line of the rotor plate 10, the second deweighting groove 40 includes a first groove segment 41 and a second groove segment 42 connected in sequence; wherein, along the radial direction of the rotor plate 10 and in the direction close to the center line of the rotor plate 10, the width of the second groove segment 42 along the circumferential direction of the rotor plate 10 gradually decreases.

[0077] Specifically, along the radial direction of the rotor plate 10 and in a direction approaching the center line of the rotor plate 10 , the width of the first slot segment 41 along the circumferential direction of the rotor plate 10 gradually increases.

[0078] Specifically, a de-weighting region 200 is formed between two adjacent first de-weighting grooves 20 . The de-weighting region 200 includes two parallel de-weighting side edges 201 . At least a portion of the second groove body section 42 is located between the two de-weighting side edges 201 .

[0079] Optionally, the distance L1 between the two deweighting sides 201 ranges from 10 mm to 16 mm; and / or the second deweighting groove 40 has a groove centerline 43 along the radial direction of the rotor plate 10, and the groove centerline 43 coincides with a radial direction of the rotor plate 10.

[0080] Preferably, the distance L1 between the two weight-removing sides 201 is 11 mm.

[0081] Specifically, the second deweighting slot 40 has a slot centerline 43 along the radial direction of the rotor plate 10 , the slot centerline 43 is parallel to the deweighting side 201 ; and / or the two deweighting side 201 are symmetrically arranged relative to the slot centerline 43 .

[0082] Optionally, the angle θ2 between the two side walls of the first trough segment 41 ranges from 28° to 30°; and / or the angle θ3 between the two side walls of the second trough segment 42 ranges from 4° to 5°.

[0083] Preferably, the angle θ2 between the two side walls of the first trough section 41 is 29°, and the angle θ3 between the two side walls of the second trough section 42 is 4.3°.

[0084] Specifically, the first slot segment 41 has a first arc segment on a side away from the second slot segment 42 , and the first arc segment connects two side walls of the first slot segment 41 , wherein the radius R7 of the first arc segment ranges from 0.5 mm to 2 mm.

[0085] Preferably, the radius R7 of the first arc segment is 1 mm.

[0086] In an embodiment of the present invention, the first arc segment is a semicircle, and a distance R16 between the center of the first arc segment and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 160 mm to 168 mm.

[0087] Preferably, R16 is 164 mm.

[0088] Specifically, the second slot segment 42 has a second arc segment on a side away from the first slot segment 41 , and the second arc segment connects two side walls of the second slot segment 42 , wherein a radius R9 of the second arc segment ranges from 1 mm to 2 mm.

[0089] Preferably, the radius R9 of the second arc segment is 1.5 mm.

[0090] In an embodiment of the present invention, the second arc segment is a semicircle, and a distance R14 between the center of the second arc segment and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 110 mm to 118 mm.

[0091] Preferably, R14 is 114 mm.

[0092] Specifically, a seventh transition fillet is provided between the side wall of the first slot body segment 41 and the side wall of the second slot body segment 42 , and a radius R8 of the seventh transition fillet is in a range of 1.5 mm to 3 mm.

[0093] Preferably, the radius R8 of the seventh transition fillet is 2.25 mm.

[0094] Specifically, a second deweighting groove 40 has two seventh transition fillets, and a distance R15 between the center point of the line connecting the centers of the two seventh transition fillets and the intersection of the center line of the rotor plate 10 and the radial line 11 ranges from 150 mm to 158 mm.

[0095] Preferably, R15 is 154 mm.

[0096] In an embodiment of the present invention, Figure 3 As shown, the rotor plate 10 includes a first circular side wall and a second circular side wall, and the radius of the first and second circular side walls is greater than the radius of the first circular side wall, so that the rotor plate 10 forms a concentric circle structure; wherein, the rotor core 12 is between the first and second circular side walls.

[0097] Specifically, the first circular side radius R11 ranges from 80 mm to 90 mm, and the second circular side wall radius R19 ranges from 284 mm to 294 mm.

[0098] Preferably, the first circular sidewall radius R11 is 85 mm, and the second circular sidewall radius R19 is 289 mm.

[0099] The present invention also provides a motor, comprising a rotor structure and a stator structure that cooperate with each other, wherein the rotor structure is the above-mentioned rotor structure.

[0100] Specifically, the stator structure is located inside the first circular side wall.

[0101] The present invention also provides an air conditioner, comprising a motor, which is the above-mentioned motor.

[0102] In summary, the rotor plate 10 of the present invention includes a first deweighting groove 20 and a second deweighting groove 40. The first deweighting groove 20 and the second deweighting groove 40 are both polygonal structures, wherein the first deweighting groove 20 and the second deweighting groove 40 are octagonal and shuttle-shaped structures, and the first deweighting groove 20 and the second deweighting groove 40 are staggered. This arrangement of the deweighting grooves can remove as much weight as possible without affecting the magnetic flux saturation and structural strength of the motor rotor, so as to realize the lightweight design of the motor, effectively improve the power density of the motor, and help reduce costs.

[0103] The rotor structure of the present invention is formed by stacking multiple rotor plates 10, each of which has a deweighting groove (a first deweighting groove 20 and a second deweighting groove 40). The rotor plates 10 are stacked so that the deweighting grooves on each rotor plate 10 form a deweighting groove cavity. The area of ​​the deweighting groove is increased, and the area of ​​the deweighting groove in contact with the air is increased, which is beneficial to dissipating the heat generated by the rotor due to hysteresis loss and eddy current loss of the magnetic steel. At the same time, the rotor structure of the present invention can effectively reduce the weight of the rotor core 12 by setting the first deweighting groove 20 and the second deweighting groove 40, thereby effectively reducing the rotational inertia of the motor rotor, which is beneficial to controller control.

[0104] At the same time, the present invention realizes lightweight design of the motor, improves motor power density, reduces motor cost, reduces motor noise, and improves heat dissipation capacity by constraining the key dimensions of the de-weighting grooves (the first de-weighting groove 20 and the second de-weighting groove 40).

[0105] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0106] The rotor structure of the present invention includes a plurality of rotor plates 10 stacked in sequence, each of which is provided with a first deweighting groove 20, the first deweighting groove 20 including a main groove body 21 and a sub-grooved body 22 that are interconnected, the sub-grooved body 22 being provided on a side of the main groove body 21 away from the center line of the rotor plate 10; wherein, with the circumferential direction of the rotor plate 10 as the length direction and the plane parallel to the rotor plate 10 as the projection plane, the projection of the sub-grooved body 22 on the projection plane is the sub-grooved body projection 220, and the projection of the main groove body 21 on the projection plane is the main groove body projection 210; the sub-grooved body projection 220 is used to be projected on the main groove body The length of the connecting edge of the projection 210 is smaller than the length of the connecting edge of the main slot body projection 210 used to connect with the sub-slot body projection 220. The rotor structure of the present invention is composed of a plurality of rotor plates 10 stacked together, and each rotor plate 10 has a first deweighting groove 20. The rotor plates 10 are stacked so that the first deweighting groove 20 on each rotor plate 10 forms a deweighting groove cavity. The area of ​​the deweighting groove is increased, thereby effectively reducing the weight of the rotor structure and improving the power density of the rotor structure. In addition, the area of ​​the deweighting groove in contact with the air is increased, which is conducive to dissipating the heat generated by the rotor due to hysteresis loss and eddy current loss of the magnetic steel.

[0107] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A rotor structure comprising a plurality of rotor plates (10) stacked in sequence, each of the rotor plates (10) being provided with a first deweighting groove (20), characterized in that: The first deweighting tank (20) comprises a main tank body (21) and a sub-tank body (22) that are interconnected, and the sub-tank body (22) is arranged on a side of the main tank body (21) away from the center line of the rotor plate (10); Wherein, a plane parallel to the rotor sheet (10) is used as a projection plane, a projection of the sub-slot body (22) on the projection plane is a sub-slot body projection (220), and a projection of the main slot body (21) on the projection plane is a main slot body projection (210); Taking the circumferential direction of the rotor sheet (10) as the length direction, the length of the connection side of the sub-slot body projection (220) for connecting with the main slot body projection (210) is smaller than the length of the connection side of the main slot body projection (210) for connecting with the sub-slot body projection (220); The main slot body (21) comprises a first main slot section (211) and a second main slot section (212) arranged along the radial direction of the rotor plate (10); the first main slot section (211) is located on a side of the second main slot section (212) away from the center line of the rotor plate (10) and is connected to the sub-slot body (22); the first main slot section (211) comprises a first side wall (2111) and a second side wall (2112) arranged opposite to each other; the second main slot section (212) comprises a third side wall (2121) and a fourth side wall (2122); the first side wall (2111) and the third side wall (2121) are connected and arranged at an inclination to each other; the second side wall (2112) and the fourth side wall (2122) are connected and arranged at an inclination to each other.

2. The rotor structure according to claim 1, characterized in that: In a direction away from the center line of the rotor plate (10), the length of the slot body (22) along the circumferential direction of the rotor plate (10) gradually decreases; and / or In a direction approaching the center line of the rotor plate (10), at least a portion of the main slot body (21) gradually decreases in length along the circumferential direction of the rotor plate (10); and / or The sub-slot projection (220) is a polygonal structure; and / or The main tank projection (210) is a polygonal structure.

3. The rotor structure according to claim 1, characterized in that: The sub-slot projection (220) includes a first sub-slot edge (221) and a second sub-slot edge (222), wherein the first sub-slot edge (221) and the second sub-slot edge (222) are arranged opposite to each other, and the first sub-slot edge (221) is located on a side of the second sub-slot edge (222) away from the main slot projection (210); the length of the second sub-slot edge (222) is greater than the length of the first sub-slot edge (221), and the second sub-slot edge (222) is connected to the main slot projection (210).

4. The rotor structure according to claim 3, characterized in that: The segmented slot projection (220) further includes a third segmented slot edge (223) and a fourth segmented slot edge (224). The length L5 of the first groove edge (221) ranges from 14 mm to 17 mm; and / or A first transition fillet is formed between the first sub-groove edge (221) and the third sub-groove edge (223) and / or the fourth sub-groove edge (224), and the radius R1 of the first transition fillet has a value range of 3 mm to 5 mm.

5. The rotor structure according to claim 3, characterized in that: The slot body projection (220) further includes a third slot edge (223) and a fourth slot edge (224), wherein the third slot edge (223) and the fourth slot edge (224) are arranged opposite to each other, and the two ends of the third slot edge (223) are respectively connected to the first end of the first slot edge (221) and the first end of the second slot edge (222), and the two ends of the fourth slot edge (224) are respectively connected to the second end of the first slot edge (221) and the second end of the second slot edge (222).

6. The rotor structure according to claim 5, characterized in that: The main groove body projection (210) has a first main groove section (211) for connecting to the second sub-groove edge (222), The included angle θ4 between the first main groove section (211) and the third sub-groove edge (223) and / or the fourth sub-groove edge (224) is in the range of 120° to 150°; and / or A second transition fillet is formed between the first main groove section (211) and the third sub-groove edge (223) and / or the fourth sub-groove edge (224), and the radius R2 of the second transition fillet has a value range of 4 mm to 6 mm.

7. The rotor structure according to any one of claims 1 to 5, characterized in that: Each of the rotor plates (10) is provided with a plurality of magnetic steel slots (30), the plurality of magnetic steel slots (30) forming a plurality of pairs of magnetic steel slot groups (3), each of the magnetic steel slot groups (3) comprising two magnetic steel slots (30), the two magnetic steel slots (30) in each of the magnetic steel slot groups (3) being arranged in a V-shaped structure, with a spacing region (300) formed between two adjacent V-shaped structures; The slot bodies (22) and the spacing regions (300) are arranged correspondingly along the radial direction of the rotor plate (10), and / or At least a portion of the sub-trough body (22) is located on the spacing area (300); and / or A first fastening hole (301) for a first fastener to pass through is provided in the spacing area (300).

8. The rotor structure according to claim 1, characterized in that: The first side wall (2111) and / or the second side wall (2112) comprises an inclined wall section (2113) for connecting to the second main slot section (212), the inclined wall section (2113) being inclined to a radial line (11) of the rotor plate (10), and a length L4 of the inclined wall section (2113) being in a range of 11 mm to 13 mm; and / or The length L3 of the plane section of the third side wall (2121) and / or the fourth side wall (2122) ranges from 21 mm to 25 mm; and / or The first main groove section (211) has a first main groove wall (2110) for connecting to the sub-groove body (22), and a third transition fillet R3 is provided between the first main groove wall (2110) and the first side wall (2111) and / or the second side wall (2112), wherein the radius R3 of the third transition fillet ranges from 3 mm to 5 mm.

9. The rotor structure according to claim 8, characterized in that: The angle θ1 between the inclined wall section (2113) and the extension line of the third side wall (2121) is in the range of 13° to 14°; and / or The angle between the inclined wall section (2113) and the extension line of the fourth side wall (2122) is in the range of 13° to 14°; and / or The angle between the inclined wall section (2113) and the third side wall (2121) is equal to the angle between the inclined wall section (2113) and the fourth side wall (2122).

10. The rotor structure according to claim 1, characterized in that: There are a plurality of first de-weighting grooves (20), and the plurality of first de-weighting grooves (20) are distributed at intervals along the circumference of the rotor plate (10); in two adjacent first de-weighting grooves (20), a minimum distance L2 between the first main groove sections (211) of the two first de-weighting grooves (20) has a value range of 5 mm to 8 mm.

11. The rotor structure according to any one of claims 1 to 5, characterized in that: There are a plurality of first deweighting grooves (20), and the plurality of first deweighting grooves (20) are distributed at intervals along the circumference of the rotor plate (10); the end wall of at least one main groove body (21) of the plurality of first deweighting grooves (20) close to the center line of the rotor plate (10) includes an arcuate wall section (213), and a second fastening hole (100) for a first fastener to pass through is provided on the rotor plate (10), and the arcuate wall section (213) is provided around the second fastening hole (100).

12. The rotor structure according to claim 11, characterized in that: The radius R10 of the arc-shaped wall segment (213) ranges from 4 mm to 6 mm; and / or A fourth transition fillet and a fifth transition fillet are sequentially provided between the side wall of the main tank body (21) and the arc-shaped wall section (213); the fourth transition fillet is connected to the side wall of the main tank body (21), and the fifth transition fillet is connected to the arc-shaped wall section (213); the radius R4 of the fourth transition fillet is in a range of 4 mm to 6 mm, and the radius R5 of the fifth transition fillet is in a range of 0.5 mm to 2 mm.

13. The rotor structure according to any one of claims 1 to 5, characterized in that: There are a plurality of first deweighting grooves (20), and the plurality of first deweighting grooves (20) are distributed at intervals along the circumference of the rotor plate (10); the end wall of at least one main groove body (21) in the plurality of first deweighting grooves (20) close to the center line of the rotor plate (10) is a plane end wall (214), and a sixth transition fillet is provided between the plane end wall (214) and the side wall of the main groove body (21), and the radius R6 of the sixth transition fillet ranges from 4 mm to 6 mm.

14. The rotor structure according to any one of claims 1 to 5, characterized in that: There are a plurality of first deweighting grooves (20), and the plurality of first deweighting grooves (20) are distributed at intervals along the circumference of the rotor plate (10); Each of the rotor plates (10) is provided with a second deweighting groove (40), and the second deweighting groove (40) is provided between two adjacent first deweighting grooves (20).

15. The rotor structure according to claim 14, characterized in that: There are a plurality of the second de-weighting grooves (40), and at least one second de-weighting groove (40) is provided between any two adjacent first de-weighting grooves (20).

16. The rotor structure according to claim 14, characterized in that There are a plurality of the second de-duplication grooves (40), and a plurality of the first de-duplication grooves (20) are surrounded by a plurality of de-duplication areas (200). The plurality of the second de-duplication grooves (40) are arranged in a one-to-one correspondence with the plurality of the de-duplication areas (200).

17. The rotor structure according to claim 14, characterized in that Along the radial direction of the rotor plate (10) and in a direction close to the center line of the rotor plate (10), the second deweighting groove (40) includes a first groove body segment (41) and a second groove body segment (42) connected in sequence; wherein, along the radial direction of the rotor plate (10) and in a direction close to the center line of the rotor plate (10), the width of the second groove body segment (42) along the circumferential direction of the rotor plate (10) gradually decreases.

18. The rotor structure according to claim 17, characterized in that: Along the radial direction of the rotor plate (10) and in a direction close to the center line of the rotor plate (10), the width of the first slot body segment (41) along the circumferential direction of the rotor plate (10) gradually increases.

19. The rotor structure according to claim 17, characterized in that A deweighting region (200) is formed between two adjacent first deweighting grooves (20), the deweighting region (200) comprising two parallel deweighting side edges (201), and at least a portion of the second groove body section (42) is located between the two deweighting side edges (201).

20. The rotor structure according to claim 19, characterized in that The distance L1 between the two deduplication sides (201) has a value ranging from 10 mm to 16 mm; and / or The second deweighting groove (40) has a groove body center line (43) along the radial direction of the rotor plate (10), and the groove body center line (43) coincides with a radial direction of the rotor plate (10).

21. The rotor structure according to claim 19, characterized in that The second deweighting groove (40) has a groove body centerline (43) along the radial direction of the rotor plate (10), The center line (43) of the tank body is parallel to the weight-removing side edge (201); and / or The two weight-removing side edges (201) are symmetrically arranged relative to the center line (43) of the tank body.

22. The rotor structure according to claim 17, characterized in that The included angle θ2 between the two side walls of the first trough section (41) ranges from 28° to 30°; and / or The value range of the included angle θ3 between the two side walls of the second trough section (42) is 4° to 5°.

23. A motor comprising a rotor structure and a stator structure that cooperate with each other, characterized in that: The rotor structure is the rotor structure according to any one of claims 1 to 22.

24. An air conditioner comprising a motor, characterized in that: The motor is the motor according to claim 23.

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