CN110620452A - Rotor, motor and compressor - Google Patents
Rotor, motor and compressor Download PDFInfo
- Publication number
- CN110620452A CN110620452A CN201810637504.2A CN201810637504A CN110620452A CN 110620452 A CN110620452 A CN 110620452A CN 201810637504 A CN201810637504 A CN 201810637504A CN 110620452 A CN110620452 A CN 110620452A
- Authority
- CN
- China
- Prior art keywords
- rotor
- punching
- sheets
- sub
- punching sheets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004080 punching Methods 0.000 claims abstract description 225
- 229910000859 α-Fe Inorganic materials 0.000 claims description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 10
- 150000002910 rare earth metals Chemical group 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- 239000010949 copper Substances 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 6
- 238000003475 lamination Methods 0.000 description 31
- 230000005347 demagnetization Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a rotor which comprises a plurality of first punching sheets, a plurality of second punching sheets, a plurality of openings and a plurality of magnets, wherein the first punching sheets and the second punching sheets are stacked to form a rotor core, the openings are circumferentially arranged on each of the first punching sheets and the second punching sheets, the first punching sheets and the second punching sheets are divided into a rotor yoke and a plurality of pole crowns by the openings, the pole crowns are arranged on the periphery of the rotor yoke in an enclosing mode, the openings penetrate through the rotor core in the axial direction to form a plurality of slots, and the magnets are arranged in the slots in a one-to-one correspondence mode. According to the invention, the first punching sheet and the second punching sheet with different structures are adopted, so that the magnetic leakage of the rotor can be effectively reduced, the air gap flux density amplitude is improved, the copper consumption is reduced, and the motor performance is improved.
Description
Technical Field
The invention relates to the field of compressors, in particular to a rotor, a motor and a compressor.
Background
In the existing rotary direct-current variable-frequency compressor adopting the motor, the motor generally adopts a built-in permanent magnet motor, and the rotor structure has larger magnetic leakage due to the existence of a magnetic bridge on a rotor core. Through reducing magnetic isolation bridge width, can reduce the magnetic leakage, promote motor performance. However, the width of the magnetic isolation bridge is too small, so that the mechanical strength of the rotor is weakened, the rotor core deforms at a high speed, the performance is deteriorated, and the bore sweeping can occur under the more serious condition, so that the motor is damaged. Therefore, this type of motor has a design conflict between the improvement of the running performance and the guarantee of the mechanical strength.
In addition, because the magnet of the traditional built-in permanent magnet motor is arranged in the rotor core, under the load working condition, the armature reaction is strong, and particularly, under the weak magnetic working condition or even the short circuit working condition, the magnet has the risk of easy demagnetization.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a rotor.
A second aspect of the invention provides an electric machine.
A third aspect of the present invention is to provide a compressor.
In view of the above, according to an aspect of the present invention, there is provided a rotor for an electric motor, the rotor including a plurality of first stamped sheets, a plurality of second stamped sheets, a plurality of openings and a plurality of magnets, the plurality of first stamped sheets and the plurality of second stamped sheets are stacked to form a rotor core, the plurality of openings are circumferentially disposed on each of the plurality of first stamped sheets and the plurality of second stamped sheets, the plurality of openings divide the first stamped sheets and the second stamped sheets into a rotor yoke and a plurality of pole crowns, the plurality of pole crowns are disposed around an outer circumference of the rotor yoke, the plurality of openings axially penetrate along the rotor core to form a plurality of slots, the plurality of magnets are disposed in the plurality of slots in a one-to-one correspondence, wherein, each of a plurality of first punching pieces includes at least one splice bar, and any one of at least one splice bar sets up between two adjacent in a plurality of polar crowns, and two adjacent each other do not connect in a plurality of polar crowns in the second punching piece.
The invention provides a rotor which comprises a plurality of first punching sheets, a plurality of second punching sheets, a plurality of openings and a plurality of magnets, wherein the plurality of first punching sheets and the plurality of second punching sheets are stacked to form a rotor core, the plurality of openings are circumferentially arranged on each of the plurality of first punching sheets and the plurality of second punching sheets, the plurality of openings divide the first punching sheets and the second punching sheets into a rotor yoke and a plurality of polar crowns, the plurality of polar crowns surround the periphery of the rotor yoke, the plurality of openings are communicated along the axial direction of the rotor core to form a plurality of slots, the plurality of magnets are arranged in the plurality of slots in a one-to-one correspondence manner, preferably, the magnets are in a sheet shape or an arc shape, the magnets are matched with the slots, each of the plurality of first punching sheets comprises at least one connecting rib, any one of the at least one connecting rib is arranged between two adjacent polar crowns of the plurality of polar crowns, preferably, the connecting ribs are connected with the rotor yoke, two adjacent crowns of the second punching sheets are not connected with each, the rotor core is formed by stacking the first punching sheet comprising at least one connecting rib and the second punching sheet without the connecting rib, the connecting rib can ensure the mechanical strength of the first punching sheet, and the influence on the motor performance caused by the deformation of the rotor core in the high-speed rotation process is avoided.
In addition, according to the rotor in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in the above technical scheme, preferably, the plurality of first stamped sheets include a plurality of first sub-stamped sheets and a plurality of second sub-stamped sheets, and a connecting rib is arranged between every two adjacent ones of the plurality of pole crowns of each of the plurality of first sub-stamped sheets; each of the multiple polar crowns of each of the multiple second sub-stamped sheets is a first polar crown, one end of each first polar crown is connected with an adjacent polar crown through a connecting rib, and the other end of each first polar crown is not connected with the adjacent polar crown; the second punching sheet is clamped between the first sub-punching sheets; and/or the second sub-stamped sheet is clamped between the first sub-stamped sheets; and/or the second punching sheet is clamped between the second sub punching sheets.
In the technical scheme, the plurality of first stamped sheets comprise a plurality of first sub-stamped sheets and a plurality of second sub-stamped sheets, wherein connecting ribs are arranged between every two adjacent polar crowns of each first sub-stamped sheet, namely every two polar crowns on the first sub-stamped sheets are connected through the connecting ribs, so that the mechanical strength of the first stamped sheets is ensured, and the influence of deformation of a rotor core in a high-speed rotation process on the performance of a motor is avoided; each of a plurality of polar crowns of each of a plurality of second sub-punching is first polar crown, the one end of first polar crown is passed through the splice bar and is linked to each other with adjacent polar crown, the other end and the adjacent polar crown of first polar crown are not connected, be provided with the splice bar at the interval on the second sub-punching, link to each other through the splice bar between partial polar crown, do not connect between partial polar crown, so on the one hand the second sub-punching can ensure self mechanical strength under the effect of splice bar, avoid rotor core to warp and influence the motor performance in high-speed rotatory in-process, on the other hand because the second sub-punching upper portion branch polar crown is not connected each other, can effectively get rid of rotor core axial ascending partial magnetic bridge, the armature reaction intensity has been reduced, effectively promote the anti demagnetization ability of motor. In addition, the second punching sheet is clamped between the first sub-punching sheets; and/or the second sub-stamped sheet is clamped between the first sub-stamped sheets; and/or the second punching sheet is clamped between the second sub-punching sheets, namely the rotor core is formed by stacking the first sub-punching sheets, the second sub-punching sheets and the second punching sheets with different structures, and the stacking modes of the first sub-punching sheets, the second sub-punching sheets and the second punching sheets are diversified, so that the magnetic flux leakage of the rotor is effectively reduced, the air gap flux density amplitude is improved, the copper loss is reduced, and the motor performance is improved.
In any one of the above technical solutions, preferably, projections of the connecting ribs of the second sub-punching sheets and the connecting ribs of the first sub-punching sheets on a plane perpendicular to the axial direction of the rotor core are completely overlapped.
In the technical scheme, projections of the connecting ribs of the second sub-punching sheets and the connecting ribs of the first sub-punching sheets on a plane perpendicular to the axial direction of the rotor core are completely overlapped, namely the second sub-punching sheets comprise a first type of second sub-punching sheets and a second type of second sub-punching sheets, the projection sum of the connecting ribs of the first type of second sub-punching sheets and the projection sum of the connecting ribs of the second type of second sub-punching sheets on the plane perpendicular to the axial direction of the rotor core is completely overlapped with the projection of the connecting ribs of the first sub-punching sheets on the plane perpendicular to the axial direction of the rotor core, namely the first type of second sub-punching sheets and the second type of second sub-punching sheets are stacked in a staggered mode, namely the connecting ribs of the first type of second sub-punching sheets do not have the connecting rib area stacking corresponding to the second type of second sub-punching. In addition, the second punching sheet is clamped between the first sub-punching sheets, the first type of second sub-punching sheets is clamped between the first sub-punching sheets, the second punching sheet is clamped between the first type of second sub-punching sheets, and/or the second punching sheet is clamped between the second type of second sub-punching sheets, the rotor core is formed by stacking the first sub-punching sheets, the first type of second sub-punching sheets, the second type of second sub-punching sheets and the second punching sheets with different structures, the stacking modes of the first sub-punching sheets, the first type of second sub-punching sheets, the second type of second sub-punching sheets and the second punching sheets are diversified, and therefore the magnetic leakage of the rotor is effectively reduced, the air gap magnetic density amplitude is improved, the copper loss is reduced, and the motor performance is improved.
In any one of the above technical solutions, preferably, the stacking thickness of the first sub-punching sheets is L1, and the sum of the stacking thicknesses of the second punching sheets and the second sub-punching sheets is L, and satisfies 0.0105(L1+ L) ≦ L1 ≦ 0.1(L1+ L).
In the technical scheme, the stacking thickness of the first punching sheets is L1, the sum of the stacking thicknesses of the second punching sheets and the second punching sheets is L, and the sum of the stacking thicknesses of 0.0105(L1+ L) and L1 which are not less than 0.1(L1+ L) is met, through limiting the sum of the stacking thicknesses of the first punching sheets and the stacking thicknesses of the second punching sheets and the second punching sheets, the rotor magnetic leakage is further reduced, the air gap magnetic density amplitude is improved, the copper loss is reduced, and the motor performance is improved. In addition, because two adjacent in a plurality of polar crowns in the second towards piece are not connected each other, then the second towards piece can effectively reduce armature reaction intensity, and then promotes the anti demagnetization ability of motor.
In any one of the above technical solutions, preferably, when the magnet is a radially magnetized magnet, the rivet hole or the rivet button is disposed on each of the plurality of pole crowns of the first stamped sheet and the second stamped sheet, so that the plurality of first stamped sheets and the plurality of second stamped sheets are connected.
In this technical scheme, when magnet adopted radial magnetization mode, the rivet hole or riveting detain to set up on each of a plurality of polar crowns of first punching sheet and second punching sheet, and a plurality of first punching sheets and a plurality of second punching sheet accessible set up the riveting knot on every polar crown and be connected, perhaps drive the rivet hole on each polar crown of a plurality of first punching sheets and a plurality of second punching sheet through the rivet so that a plurality of first punching sheets and a plurality of second punching sheet are connected. Of course, the plurality of first stamped pieces and the plurality of second stamped pieces may also adopt other fixing structures to connect, and all of them fall within the protection scope of the present invention as long as they do not depart from the design concept of the present invention.
In any one of the above technical solutions, preferably, when the magnet is a tangentially magnetized magnet, the rivet hole or the riveting buckle is disposed on each of the plurality of pole crowns of the first punching sheet and the second punching sheet, and the rivet hole or the riveting buckle is disposed between two magnets of the same polarity in the plurality of magnets.
In this technical scheme, when magnet adopts the tangential mode of magnetizing, the rivet hole or riveting are detained and are set up on each of a plurality of polar crowns of first punching sheet and second punching sheet, and the rivet hole or riveting are detained and are located between two magnets of the same polarity in a plurality of magnets, a plurality of first punching sheets and a plurality of second punching sheet accessible set up the riveting knot on every polar crown and be connected, perhaps go into the rivet hole on each polar crown of a plurality of first punching sheets and a plurality of second punching sheet through the rivet nail so that a plurality of first punching sheets and a plurality of second punching sheet are connected. Of course, the plurality of first stamped pieces and the plurality of second stamped pieces may also adopt other fixing structures to connect, and all of them fall within the protection scope of the present invention as long as they do not depart from the design concept of the present invention.
In any of the above technical solutions, preferably, the rivet hole is circular, triangular, or hexagonal; and/or the shape of the riveting buckle is rectangular or circular.
In the technical scheme, the rivet hole is circular, triangular, hexagonal or other shapes; and/or the shape of riveting knot is rectangle, circular or other shapes, can set up on the pole crown according to actual need, effectively promotes the flexibility of erection joint between first punching sheet and the second punching sheet.
In any of the above technical solutions, preferably, the magnet is a linear magnet or a V-shaped magnet; and/or the magnet is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet.
In the technical scheme, the magnet is a linear magnet, a V-shaped magnet or a magnet with other shapes, specifically, the geomagnetic iron can be a radial and tangential mixed structure, and the slot is matched with the magnet; and/or the magnet is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet, wherein the magnet can be in other shapes, and the magnet can be prepared from other materials, and the magnet and the ferrite mixed magnet belong to the protection scope of the invention as long as the design concept of the invention is met.
According to a second aspect of the present invention, there is provided an electric machine comprising a rotor according to any of the above-mentioned technical solutions, so that the rotor has all the advantages, which will not be described herein again.
In any of the above technical solutions, preferably, the motor further includes a stator body, and the stator body is enclosed outside the rotor; wherein the rated torque of the motor is T, the inner diameter of the stator body is Di, the unit volume torque of the rotor is TPV, and the requirements are met
5.18×10-7≤T×Di-3×TPV-1≤1.17×10-6，
5kN·m·m-3≤TPV≤45kN·m·m-3，
Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3。
In the technical scheme, the motor also comprises a stator body, wherein the stator body is arranged around the outer side of the rotor; wherein the rated torque of the motor is T, the inner diameter of the stator body is Di, the unit volume torque of the rotor is TPV, and the torque meets the requirement of 5.18 multiplied by 10-7≤T×Di-3×TPV-1≤1.17×10-6The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3The numerical range of the combined variable of the rated torque T of the motor, the inner diameter Di of the stator body and the unit volume torque TPV of the rotor is limited, so that the motor can meet the power requirement of the compressor, in addition, the motor and the compressor adopting the rotor can effectively reduce the magnetic leakage of the rotor, the utilization rate of the permanent magnet is increased, and the motor efficiency is improved.
In any of the above technical solutions, preferably, the stator body further includes a plurality of stator teeth and a plurality of stator slots, the plurality of stator teeth are disposed on an inner side wall of the stator body toward the rotor, and each of the plurality of stator slots is disposed between two adjacent ones of the plurality of stator teeth; a coil located in the stator slot across one of the stator lobes; the number of the stator slots is Z, the number of the pole pairs of the rotor is P, and Z/2P is 3/2 or 6/5 or 6/7 or 9/8 or 9/10.
In the technical scheme, the stator body also comprises a plurality of stator convex teeth and a plurality of stator slots, the plurality of stator convex teeth are arranged on the inner side wall of the stator body towards the rotor, and each of the plurality of stator slots is disposed between adjacent two of the plurality of stator lobes, when the number of stator lobes spanned by one coil is one, i.e. the coils are located in the stator slots across one stator lobe, defining a proportional relationship between the number Z of stator slots and the number P of pole pairs of the rotor, and further limit the pole slot matching of the motor, wherein when the number of the pole pairs of the rotor is P, the number of the pole pairs of the rotor is 2P, namely the motor can be a 6-pole 9-slot motor, a 4-pole 6-slot motor, an 8-pole 12-slot motor, a 10-pole 9-slot motor, a 10-pole 12-slot motor and an 8-pole 9-slot motor, the motor of the type can effectively reduce the magnetic leakage of the rotor, improve the magnetic flux and contribute to improving the efficiency of the motor.
According to a third aspect of the present invention, there is provided a compressor comprising a rotor according to any one of the above aspects; or the motor according to any of the above technical solutions, so that the rotor or the motor has all the beneficial effects, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural view of a rotor core of a rotor according to an embodiment of the present invention;
fig. 2 shows a schematic structural view of a first subplate of a rotor according to an embodiment of the invention;
fig. 3 shows a schematic structural view of a first subplate of a rotor according to another embodiment of the invention;
fig. 4 shows a schematic structural view of a first sub-lamination of a rotor in accordance with a further embodiment of the invention;
fig. 5 shows a schematic structural view of a first sub-lamination of a rotor in accordance with a further embodiment of the invention;
fig. 6 shows a schematic structural view of a first sub-lamination of a rotor in accordance with a further embodiment of the invention;
FIG. 7 shows a schematic structural view of a second lamination of a rotor in an embodiment in accordance with the invention;
fig. 8 shows a schematic structural view of a second punching sheet of a rotor according to another embodiment of the invention;
fig. 9 shows a schematic structural view of a second punching sheet of a rotor in a further embodiment according to the invention;
fig. 10 shows a schematic structural view of a second subplate of the rotor in an embodiment according to the invention;
fig. 11 shows a schematic structural view of a second sub-lamination of a rotor in another embodiment according to the present invention;
FIG. 12 shows a schematic view of a compressor in accordance with an embodiment of the present invention;
FIG. 13 shows a back-emf versus current diagram of an embodiment of the present invention and a related art embodiment;
FIG. 14 shows a cost comparison graph of an embodiment of the present invention and an embodiment of the related art.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 12 is:
1 rotor core, 12 first punching sheet, 122 first sub punching sheet, 124 second sub punching sheet, 13 second punching sheet, 14 openings, 15 rotor yokes, 16 pole crowns, 17 connecting ribs, 182 riveting buckles, 184 rivet holes, 19 slots, 2 motors and 3 compressors.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The rotor, the motor, and the compressor according to some embodiments of the present invention are described below with reference to fig. 1 to 12.
According to an aspect of the present invention, there is provided a rotor, as shown in fig. 1 to 9, for an electric machine 2, the rotor including a plurality of first stamped pieces 12, a plurality of second stamped pieces 13, a plurality of openings 14, and a plurality of magnets, the plurality of first stamped pieces 12 and the plurality of second stamped pieces 13 being stacked to constitute a rotor core 1, the plurality of openings 14 being circumferentially disposed on each of the plurality of first stamped pieces 12 and the plurality of second stamped pieces 13, the plurality of openings 14 dividing the first stamped pieces 12 and the second stamped pieces 13 into a rotor yoke 15 and a plurality of pole crowns 16, the plurality of pole crowns 16 being circumferentially disposed around an outer periphery of the rotor yoke 15, the plurality of openings 14 penetrating in an axial direction of the rotor core 1 to form a plurality of slots 19, the plurality of magnets being disposed in the plurality of slots 19 in a one-to-one correspondence, wherein each of the plurality of first stamped pieces 12 includes at least one connecting rib 17, any one of the at least one connecting rib 17 is disposed between adjacent two of the plurality of pole crowns 16, two adjacent ones of the plurality of pole crowns 16 in the second punching sheet 13 are not connected to each other.
The rotor provided by the invention comprises a plurality of first punching sheets 12, a plurality of second punching sheets 13, a plurality of openings 14 and a plurality of magnets, wherein the plurality of first punching sheets 12 and the plurality of second punching sheets 13 are stacked to form a rotor core 1, the plurality of openings 14 are circumferentially arranged on each of the plurality of first punching sheets 12 and the plurality of second punching sheets 13, the plurality of openings 14 divide the first punching sheets 12 and the second punching sheets 13 into a rotor yoke 15 and a plurality of polar crowns 16, the plurality of polar crowns 16 are enclosed at the periphery of the rotor yoke 15, the plurality of openings 14 penetrate along the axial direction of the rotor core 1 to form a plurality of slots 19, the plurality of magnets are correspondingly arranged in the plurality of slots 19 one by one, preferably, the magnets are sheet-shaped or arc-shaped, the magnets are matched with the slots 19, each of the plurality of first punching sheets 12 comprises at least one connecting rib 17, any one of the at least one connecting rib 17 is arranged between two adjacent polar crowns 16, preferably, the connecting ribs 17 are connected with the rotor yoke 15, two adjacent laminations 13 in the second lamination 13 are not connected with each other, the rotor core 1 of the invention is formed by stacking the first lamination 12 including at least one connecting rib 17 and the second lamination 13 without the connecting rib 17, the connecting rib 17 can ensure the mechanical strength of the first lamination 12, and avoid the influence of the deformation of the rotor core 1 on the performance of the motor 2 in the high-speed rotation process, because two adjacent laminations 16 of the second lamination 13 are not connected with each other, namely the second lamination 13 does not have the connecting rib 17, a part of magnetic bridges in the axial direction of the rotor core 1 can be effectively removed, the armature reaction strength is reduced, and the demagnetization resistance of the motor 2 is effectively improved, the invention can effectively reduce the rotor magnetic leakage, improve the air gap magnetic density amplitude and reduce the copper consumption by adopting the first lamination 12 and the second lamination 13 with different structures, the performance of the motor 2 is improved, and as shown in fig. 13 and 14, the counter electromotive force of the rotor can be improved and the production cost of the motor 2 is reduced.
In an embodiment of the present invention, preferably, the plurality of first laminations 12 include a plurality of first laminations 122 and a plurality of second laminations 124, and a connecting rib 17 is disposed between each adjacent two of the plurality of pole crowns 16 of each of the plurality of first laminations 122; each of the multiple polar crowns 16 of each of the multiple second sub-laminations 124 is a first polar crown 16, one end of the first polar crown 16 is connected with the adjacent polar crown 16 through a connecting rib 17, and the other end of the first polar crown 16 is not connected with the adjacent polar crown 16; the second punching sheet 13 is clamped between the first sub-punching sheets 122; and/or the second sub-lamination 124 is clamped between the first sub-laminations 122; and/or the second punching sheet 13 is clamped between the second sub-punching sheets 124.
As shown in fig. 2 to 11, in this embodiment, the plurality of first punching sheets 12 include a plurality of first sub-punching sheets 122 and a plurality of second sub-punching sheets 124, wherein a connecting rib 17 is disposed between two adjacent ones of the plurality of pole crowns 16 of each of the plurality of first sub-punching sheets 122, that is, two pole crowns 16 on the first sub-punching sheets 122 are connected by the connecting rib 17, so as to ensure the mechanical strength of the first punching sheets 12, and avoid the rotor core 1 from deforming during high-speed rotation to affect the performance of the motor 2; each of the multiple pole crowns 16 of each of the multiple second sub-laminations 124 is a first pole crown 16, one end of the first pole crown 16 is connected with the adjacent pole crown 16 through a connecting rib 17, the other end of the first pole crown 16 is not connected with the adjacent pole crown 16, that is, the connecting ribs 17 are arranged on the second sub-laminations 124 at intervals, part of the pole crowns 16 are connected through the connecting ribs 17, and the other part of the pole crowns 16 are not connected, so that the second sub-laminations 124 can ensure the mechanical strength of the second sub-laminations under the action of the connecting ribs 17 on one hand, and the rotor core 1 is prevented from deforming in the high-speed rotation process to affect the performance of the motor 2, and on the other hand, because the pole crowns 16 on the second sub-laminations 124 are not connected with each other, part of the magnetic bridges in the axial direction of the rotor core 1 can be effectively removed, the armature reaction strength is reduced, and the demagnetization resistance of the motor 2 is effectively. In addition, the second punching sheet 13 is sandwiched between the first sub-punching sheets 122; and/or the second sub-lamination 124 is clamped between the first sub-laminations 122; and/or the second punching sheet 13 is clamped between the second sub-punching sheets 124, that is, the rotor core 1 is formed by stacking the first sub-punching sheets 122, the second sub-punching sheets 124 and the second punching sheets 13 with different structures, and the stacking modes of the first sub-punching sheets 122, the second sub-punching sheets 124 and the second punching sheets 13 are diversified, so that the rotor magnetic leakage is effectively reduced, the air gap magnetic density amplitude is improved, the copper loss is reduced, and the performance of the motor 2 is improved.
In one embodiment of the present invention, preferably, projections of the connecting ribs 17 of the second plurality of lamination sheets 124 and the connecting ribs 17 of the first plurality of lamination sheets 122 on a plane perpendicular to the axial direction of the rotor core 1 are completely overlapped.
In this embodiment, projections of the connecting ribs 17 of the second punching sheets 124 and the connecting ribs 17 of the first punching sheets 122 on a plane perpendicular to the axial direction of the rotor core 1 are completely overlapped, that is, the second punching sheets 124 include a first type of second punching sheets and a second type of second punching sheets, a projection sum of the connecting ribs 17 of the first type of second punching sheets and the connecting ribs 17 of the second type of second punching sheets on the plane perpendicular to the axial direction of the rotor core 1 is completely overlapped with a projection of the connecting ribs 17 of the first punching sheets 122 on the plane perpendicular to the axial direction of the rotor core 1, that is, the first type of second punching sheets and the second type of second punching sheets are stacked in a staggered manner, and the connecting ribs 17 of the first type of second punching sheets are stacked corresponding to a region where the second type of second punching sheets does not have the connecting ribs 17. In addition, the second punching sheet 13 is sandwiched between the first sub-punching sheets 122, and/or the first type of second sub-punching sheets is sandwiched between the first sub-punching sheets 122, and/or the second punching sheet 13 is sandwiched between the first type of second sub-punching sheets, and/or the second punching sheet 13 is sandwiched between the second type of second sub-punching sheets, and the rotor core 1 is formed by stacking the first sub-punching sheets 122, the first type of second sub-punching sheets, the second type of second sub-punching sheets and the second punching sheet 13 with different structures, and the stacking manner of the first sub-punching sheets 122, the first type of second sub-punching sheets, the second type of second sub-punching sheets and the second punching sheet 13 is diversified, so that the rotor magnetic leakage is effectively reduced, the air gap magnetic density amplitude is improved, the copper loss is reduced, and the performance of the motor 2 is improved.
In one embodiment of the invention, preferably, the stacking thickness of the plurality of first sub-punched pieces 122 is L1, the sum of the stacking thicknesses of the plurality of second punched pieces 13 and the plurality of second sub-punched pieces 124 is L, and 0.0105(L1+ L) ≦ L1 ≦ 0.1(L1+ L) is satisfied.
In this embodiment, the stacking thickness of the first sub-punching sheets 122 is L1, the sum of the stacking thicknesses of the second punching sheets 13 and the second sub-punching sheets 124 is L, and the sum of the stacking thicknesses of 0.0105(L1+ L) and L1 is equal to or less than 0.1(L1+ L), and by limiting the sum of the stacking thicknesses of the first sub-punching sheets 122 and the stacking thicknesses of the second punching sheets 13 and the second sub-punching sheets 124, the rotor magnetic leakage is reduced, the air gap magnetic flux density amplitude is increased, the copper loss is reduced, and the performance of the motor 2 is improved. In addition, because two adjacent of a plurality of pole crowns 16 are not connected each other in the second punching sheet 13, then the second punching sheet 13 can effectively reduce armature reaction effect intensity, and then promotes the anti demagnetization ability of motor 2.
In an embodiment of the present invention, preferably, when the magnet is a radially magnetized magnet, the rivet hole 184 or the rivet button 182 is disposed on each of the plurality of pole crowns 16 of the first punching sheet 12 and the second punching sheet 13, so as to connect the plurality of first punching sheets 12 and the plurality of second punching sheets 13.
As shown in fig. 2 to 11, in this embodiment, when the magnet adopts a radial magnetization mode, the rivet hole 184 or the rivet button 182 is disposed on each of the plurality of pole crowns 16 of the first punching sheet 12 and the second punching sheet 13, and the plurality of first punching sheets 12 and the plurality of second punching sheets 13 may be connected through the rivet button 182 disposed on each pole crown 16, or the rivet hole 184 on each pole crown 16 of the plurality of first punching sheets 12 and the plurality of second punching sheets 13 is driven by a rivet so as to connect the plurality of first punching sheets 12 and the plurality of second punching sheets 13. Of course, the first punching sheets 12 and the second punching sheets 13 may also be connected by other fixing structures, and the fixing structures are within the protection scope of the present invention as long as the fixing structures do not depart from the design concept of the present invention.
In an embodiment of the present invention, preferably, when the magnets are tangentially magnetized magnets, the rivet hole 184 or the rivet button 182 is disposed on each of the plurality of pole crowns 16 of the first punching sheet 12 and the second punching sheet 13, and the rivet hole 184 or the rivet button 182 is located between two magnets of the plurality of magnets with the same polarity.
In this embodiment, when the magnets adopt a tangential magnetization mode, the rivet hole 184 or the riveting buckle 182 is disposed on each of the plurality of pole crowns 16 of the first punching sheet 12 and the second punching sheet 13, and the rivet hole 184 or the riveting buckle 182 is located between two magnets of the same polarity in the plurality of magnets, the plurality of first punching sheets 12 and the plurality of second punching sheets 13 may be connected through the riveting buckle 182 disposed on each pole crown 16, or the rivet hole 184 on each pole crown 16 of the plurality of first punching sheets 12 and the plurality of second punching sheets 13 is driven by a rivet so that the plurality of first punching sheets 12 and the plurality of second punching sheets 13 are connected. Of course, the first punching sheets 12 and the second punching sheets 13 may also be connected by other fixing structures, and the fixing structures are within the protection scope of the present invention as long as the fixing structures do not depart from the design concept of the present invention.
In one embodiment of the present invention, the rivet holes 184 are preferably circular, triangular, hexagonal; and/or the shape of the rivet button 182 is rectangular or circular.
In this embodiment, the rivet holes 184 are circular, triangular, hexagonal, or other shapes; and/or the shape of the riveting buckle 182 is rectangular, circular or other shapes, and the riveting buckle can be arranged on the pole crown 16 according to actual needs, so that the flexibility of installation and connection between the first punching sheet 12 and the second punching sheet 13 is effectively improved.
In one embodiment of the present invention, preferably, the magnet is a line magnet, a V-shaped magnet; and/or the magnet is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet.
In this embodiment, the magnet is a linear magnet, a V-shaped magnet or a magnet with other shapes, specifically, the magnet may be a radial and tangential mixed structure, and the slot 19 is adapted to the magnet; and/or the magnet is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet, wherein the magnet can be in other shapes, and the magnet can be prepared from other materials, and the magnet and the ferrite mixed magnet belong to the protection scope of the invention as long as the design concept of the invention is met.
According to a second aspect of the present invention, there is provided an electric machine 2 comprising a rotor according to any of the above embodiments, thereby having all the advantages of the rotor, which will not be described herein.
In one embodiment of the present invention, preferably, the motor 2 further includes a stator body, the stator body being enclosed outside the rotor; wherein the rated torque of the motor 2 is T, the inner diameter of the stator body is Di, the unit volume torque of the rotor is TPV, and the requirements are met
5.18×10-7≤T×Di-3×TPV-1≤1.17×10-6，
5kN·m·m-3≤TPV≤45kN·m·m-3，
Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3。
In this embodiment, the motor 2 further comprises a stator body, which is enclosed outside the rotor; wherein the rated torque of the motor 2 is T, the inner diameter of the stator body is Di, the unit volume torque of the rotor is TPV, and the requirements of 5.18 multiplied by 10 are met-7≤T×Di-3×TPV-1≤1.17×10-6The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3The value range of the combination variable of the rated torque T of the motor 2, the inner diameter Di of the stator body and the unit volume torque TPV of the rotor is limited, so that the motor 2 can meet the power requirement of the compressor 3, and in addition, the motor 2 and the compressor 3 which adopt the rotor can effectively reduce the magnetic leakage of the rotor, increase the utilization rate of the permanent magnet and improve the efficiency of the motor 2.
In one embodiment of the present invention, preferably, the stator body further includes a plurality of stator teeth disposed on an inner side wall of the stator body toward the rotor, and a plurality of stator slots each disposed between adjacent two of the plurality of stator teeth; a coil located in the stator slot across one of the stator lobes; the number of the stator slots is Z, the number of the pole pairs of the rotor is P, and Z/2P is 3/2 or 6/5 or 6/7 or 9/8 or 9/10.
In this embodiment, the stator body further includes a plurality of stator lobes disposed on an inner sidewall of the stator body toward the rotor and a plurality of stator slots, and each of the plurality of stator slots is disposed between adjacent two of the plurality of stator lobes, when the number of stator lobes spanned by one coil is one, i.e. the coils are located in the stator slots across one stator lobe, defining a proportional relationship between the number Z of stator slots and the number P of pole pairs of the rotor, and thus defines a polar-slot cooperation of the motor 2, wherein, when the number of pole pairs of the rotor is P, the number of pole pairs of the rotor is 2P, namely, the motor 2 can be a 6-pole 9-slot motor, a 4-pole 6-slot motor, an 8-pole 12-slot motor, a 10-pole 9-slot motor, a 10-pole 12-slot motor and an 8-pole 9-slot motor, the motor 2 of the type can effectively reduce the magnetic leakage of the rotor, improve the magnetic flux and contribute to improving the efficiency of the motor 2.
According to a second aspect of the present invention, there is provided a compressor 3, as shown in fig. 12, the compressor 3 including the rotor according to any one of the above embodiments; or the motor 2 according to any of the above embodiments, and thus has all the advantages of the rotor or the motor 2, which will not be described herein again.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A rotor for an electric machine, comprising:
the rotor core comprises a plurality of first punching sheets and a plurality of second punching sheets, wherein the first punching sheets and the second punching sheets are stacked to form a rotor core;
the plurality of openings are circumferentially arranged on each of the plurality of first stamped sheets and the plurality of second stamped sheets, the plurality of openings divide the plurality of first stamped sheets and the plurality of second stamped sheets into a rotor yoke and a plurality of polar crowns, the plurality of polar crowns are arranged on the periphery of the rotor yoke in an enclosing manner, and the plurality of openings penetrate through the rotor core in the axial direction to form a plurality of slots;
the magnets are arranged in the slots in a one-to-one correspondence manner;
each of the first punching sheets comprises at least one connecting rib, any one of the at least one connecting rib is arranged between two adjacent polar crowns, and two adjacent polar crowns of the second punching sheet are not connected with each other.
2. The rotor of claim 1,
the plurality of first stamped sheets comprise a plurality of first sub-stamped sheets and a plurality of second sub-stamped sheets, and the connecting rib is arranged between every two adjacent ones of the plurality of pole crowns of each of the plurality of first sub-stamped sheets;
each of the multiple polar crowns of each of the multiple second sub-stamped sheets is a first polar crown, one end of each first polar crown is connected with an adjacent polar crown through the connecting rib, and the other end of each first polar crown is not connected with the adjacent polar crown;
the second punching sheet is clamped between the first sub-punching sheets; and/or
The second sub-punching sheets are clamped between the first sub-punching sheets; and/or
The second punching sheet is clamped between the second sub punching sheets.
3. The rotor of claim 2,
the projections of the connecting ribs of the second sub punching sheets and the projections of the connecting ribs of the first sub punching sheets on a plane perpendicular to the axial direction of the rotor core are completely overlapped.
4. The rotor of claim 2,
the stacking thickness of the first sub-punching sheets is L1, the sum of the stacking thicknesses of the second punching sheets and the second sub-punching sheets is L, and the condition that L1 is not less than 0.1(L1+ L) and not more than 0.0105(L1+ L) is met.
5. The rotor of any one of claims 1 to 4,
when the magnet is a radial magnetizing magnet, a rivet hole or a riveting buckle is arranged on each of the plurality of pole crowns of the first punching sheet and the second punching sheet, so that the plurality of first punching sheets and the plurality of second punching sheets are connected.
6. The rotor of any one of claims 1 to 4,
when the magnet is a tangential magnetizing magnet, a rivet hole or a riveting buckle is arranged on each of the plurality of pole crowns of the first punching sheet and the second punching sheet, and the rivet hole or the riveting buckle is positioned between two magnets with the same polarity in the plurality of magnets.
7. The rotor of claim 1,
the magnets are linear magnets and V-shaped magnets; and/or
The magnet is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet.
8. An electric machine, comprising: a rotor according to any one of claims 1 to 7.
9. The electric machine of claim 8, further comprising:
the stator body is arranged on the outer side of the rotor in a surrounding manner; wherein the content of the first and second substances,
the rated torque of the motor is T, the inner diameter of the stator body is Di, the unit volume torque of the rotor is TPV, and the requirements on the rated torque of the motor, the inner diameter of the stator body and the unit volume torque of the rotor are met
5.18×10-7≤T×Di-3×TPV-1≤1.17×10-6，
5kN·m·m-3≤TPV≤45kN·m·m-3，
Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3。
10. The electric machine of claim 9,
the stator body further includes a plurality of stator lobes disposed on an inner sidewall of the stator body toward the rotor and a plurality of stator slots, each of the plurality of stator slots disposed between adjacent ones of the plurality of stator lobes;
a coil located in the stator slot across one of the stator lobes;
the number of the stator slots is Z, the number of pole pairs of the rotor is P, and Z/2P is 3/2 or 6/5 or 6/7 or 9/8 or 9/10.
11. A compressor, comprising: a rotor according to any one of claims 1 to 7; or an electrical machine as claimed in any of claims 8 to 10.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637504.2A CN110620452A (en) | 2018-06-20 | 2018-06-20 | Rotor, motor and compressor |
| JP2020565457A JP7224373B2 (en) | 2018-06-20 | 2018-11-15 | rotors, motors and compressors |
| EP18923169.9A EP3783773B1 (en) | 2018-06-20 | 2018-11-15 | Rotor, motor and compressor |
| KR1020207032931A KR102532060B1 (en) | 2018-06-20 | 2018-11-15 | Rotors, Motors and Compressors |
| PCT/CN2018/115714 WO2019242218A1 (en) | 2018-06-20 | 2018-11-15 | Rotor, motor and compressor |
| US17/111,943 US12021414B2 (en) | 2018-06-20 | 2020-12-04 | Rotor, electric motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637504.2A CN110620452A (en) | 2018-06-20 | 2018-06-20 | Rotor, motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110620452A true CN110620452A (en) | 2019-12-27 |
Family
ID=68920744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810637504.2A Pending CN110620452A (en) | 2018-06-20 | 2018-06-20 | Rotor, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110620452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
| CN113964975A (en) * | 2021-11-19 | 2022-01-21 | 广东美的智能科技有限公司 | Rotor core, rotor, motor and robot |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206575252U (en) * | 2017-03-29 | 2017-10-20 | 大陆汽车电子(芜湖)有限公司 | The rotor and brushless electric machine of brushless electric machine |
| CN107591914A (en) * | 2017-10-09 | 2018-01-16 | 浙江三星机电股份有限公司 | A kind of rotor core and motor |
| CN108063502A (en) * | 2017-12-27 | 2018-05-22 | 安徽美芝精密制造有限公司 | Magneto and compressor |
| CN208241435U (en) * | 2018-06-20 | 2018-12-14 | 广东美芝制冷设备有限公司 | rotor, motor and compressor |
-
2018
- 2018-06-20 CN CN201810637504.2A patent/CN110620452A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206575252U (en) * | 2017-03-29 | 2017-10-20 | 大陆汽车电子(芜湖)有限公司 | The rotor and brushless electric machine of brushless electric machine |
| CN107591914A (en) * | 2017-10-09 | 2018-01-16 | 浙江三星机电股份有限公司 | A kind of rotor core and motor |
| CN108063502A (en) * | 2017-12-27 | 2018-05-22 | 安徽美芝精密制造有限公司 | Magneto and compressor |
| CN208241435U (en) * | 2018-06-20 | 2018-12-14 | 广东美芝制冷设备有限公司 | rotor, motor and compressor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
| CN113964975A (en) * | 2021-11-19 | 2022-01-21 | 广东美的智能科技有限公司 | Rotor core, rotor, motor and robot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2916434B1 (en) | Electric motor with embedded permanent magnet, compressor, and refrigeration and air conditioning equipment | |
| US9496759B2 (en) | Rotor of interior permanent magnet motor, compressor, and refrigerating air-conditioning apparatus | |
| US20150084468A1 (en) | Rotor for permanent-magnet-embedded electric motor, electric motor including the rotor, compressor including the electric motor, and air conditioner including the compressor | |
| EP2866336B1 (en) | Electric motor having embedded permanent magnet, compressor, and cooling/air-conditioning device | |
| WO2013069076A1 (en) | Rotor in permanent magnet embedded motor, motor using said rotor, compressor using said motor, and air conditioner using said compressor | |
| CN107959361B (en) | Stator of permanent magnet torque motor and permanent magnet torque motor with high torque density | |
| JP5208084B2 (en) | Rotor, blower and compressor of embedded permanent magnet motor | |
| JP2012050274A (en) | Rotor of synchronous motor | |
| CN210246575U (en) | Motor, compressor and refrigeration plant | |
| JP2011015572A (en) | Embedded permanent magnet rotor and vacuum cleaner | |
| JP2013059262A (en) | Stator core and stator and motor and compressor | |
| JP4084889B2 (en) | Permanent magnet motor rotor | |
| CN209282957U (en) | A kind of rotor and the motor with it | |
| CN110620452A (en) | Rotor, motor and compressor | |
| CN208299561U (en) | rotor, motor and compressor | |
| JP2002101586A (en) | Rotor of electric motor | |
| CN110620451B (en) | Rotor, motor and compressor | |
| US12021414B2 (en) | Rotor, electric motor and compressor | |
| CN112436625A (en) | Rotor, motor, compressor and refrigeration plant | |
| JP5691451B2 (en) | Rotor for rotating electrical machines | |
| CN210167872U (en) | Rotor, motor, compressor and refrigeration plant | |
| CN114069924A (en) | Rotor structure, motor and electrical equipment | |
| CN210142972U (en) | High-reluctance torque concentrated winding brushless motor | |
| CN107046353B (en) | Motor and compressor with same | |
| JP2002136074A (en) | Rotor core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |