CN208299561U - rotor, motor and compressor - Google Patents
rotor, motor and compressor Download PDFInfo
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- CN208299561U CN208299561U CN201820950566.4U CN201820950566U CN208299561U CN 208299561 U CN208299561 U CN 208299561U CN 201820950566 U CN201820950566 U CN 201820950566U CN 208299561 U CN208299561 U CN 208299561U
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Abstract
本实用新型提供了一种转子、电机和压缩机，其中，转子包括多个第一冲片和多个第二冲片，多个第一冲片和多个第二冲片堆叠以构成转子铁芯；多个开口周向设置于多个第一冲片和多个第二冲片中的每一个上，多个开口将多个第一冲片和多个第二冲片划分为转子轭和多个极冠，多个开口沿转子铁芯的轴向贯通以形成多个插槽；多个磁铁设置于多个插槽中；第一冲片中包括至少一个连接筋，任一个连接筋设置于多个极冠中的相邻两个之间，第一冲片的多个开口之间互不连通，第二冲片上至少两个开口相连通，本实用新型通过采用不同结构的第一冲片和第二冲片可有效降低转子漏磁，提升气隙磁密幅值，减小铜耗，提升电机性能。
The utility model provides a rotor, a motor and a compressor, wherein the rotor includes a plurality of first punches and a plurality of second punches, and the plurality of first punches and a plurality of second punches are stacked to form a rotor iron core; a plurality of openings circumferentially disposed on each of the plurality of first punches and the plurality of second punches, the plurality of openings dividing the plurality of first punches and the plurality of second punches into the rotor yoke and the plurality of second punches A plurality of pole caps, a plurality of openings penetrate along the axial direction of the rotor core to form a plurality of slots; a plurality of magnets are arranged in a plurality of slots; the first punching piece includes at least one connecting rib, and any connecting rib is set Between two adjacent pole caps, the multiple openings of the first punching sheet are not connected to each other, and at least two openings on the second punching sheet are connected. The utility model adopts the first punching sheet with different structures The first piece and the second punching piece can effectively reduce the rotor magnetic flux leakage, increase the air gap flux density amplitude, reduce copper loss, and improve the performance of the motor.
Description
Technical Field
The utility model relates to a compressor field particularly, relates 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. But separate magnetic bridge width undersize, can lead to rotor mechanical strength to weaken, rotor core takes place to warp under having high speed, and then makes the performance deteriorate, and the more serious condition can take place to sweep the thorax, and the stator rotor bumps, and the compressor pump body card dies, and the motor is stopped up, leads to the winding to destroy. Therefore, this type of motor has a design conflict between the improvement of the running performance and the guarantee of the mechanical strength.
Because the magnet of the traditional built-in permanent magnet motor is arranged in the rotor core, the armature reaction is strong under the load working condition, and particularly, the motor is easy to demagnetize under the weak magnetic working condition or even under the short circuit working condition.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
To this end, a first aspect of the present invention is to provide a rotor.
A second aspect of the present invention is to provide 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 machine, including a plurality of first stamped sheets and a plurality of second stamped sheets, the plurality of first stamped sheets and the plurality of second stamped sheets being 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 pole crowns, the plurality of pole crowns are arranged on the periphery of the rotor yoke in a surrounding 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; wherein, each of a plurality of first punchings 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 each other does not communicate between a plurality of openings of first punchings, and two at least openings are linked together in a plurality of openings of each of a plurality of second punchings.
The utility model provides a rotor comprises a plurality of first punching sheets, a plurality of second punching sheets, a plurality of openings and a plurality of magnets, 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 ones of the plurality of polar crowns, preferably, the connecting ribs are connected with the rotor yoke, and the plurality of openings of the first punching sheets, two at least openings are linked together in a plurality of openings of each of a plurality of second towards the piece, and in addition, the magnet of different polarity sets up in the opening in turn in a plurality of magnet, the utility model provides a first piece mechanical strength that dashes with the splice bar is higher, and then avoids rotor core to warp and influence the motor performance at high-speed rotatory in-process, through with every second towards two at least openings intercommunication in a plurality of openings on the piece, and then make the magnet of different polarity through the opening that is linked together and communicate, effectively reduce the rotor magnetic leakage, promote air gap flux density amplitude, reduce copper loss, promote the motor performance.
In addition, according to the utility model provides a rotor among the above-mentioned technical scheme can also have following additional technical characteristics:
in the above technical solution, preferably, the minimum radial thickness of the connecting rib of the first punching sheet is W1; each of the second punching sheets comprises at least one connecting rib, any one of the at least one connecting rib is arranged between two adjacent polar crowns, the minimum radial thickness of the connecting rib of each second punching sheet is W2, and the requirement that the W2/W1 is more than or equal to 0.2 is less than or equal to 2 is met.
In the technical scheme, the minimum radial thickness of the connecting ribs of the first stamped steel is W1, each of the second stamped steel comprises at least one connecting rib, any one of the at least one connecting rib is arranged between two adjacent polar crowns, the minimum radial thickness of the connecting ribs of the second stamped steel is W2, and on the premise that the motor running performance is good, the mechanical strength of the rotor core is ensured and the rotor core is prevented from deforming in the high-speed rotation process by limiting 0.2 to be more than or equal to W2/W1 to be more than or equal to 2. Preferably, W2/W1 is 0.6, and at this time, the back electromotive force is high, the efficiency improvement effect of the motor is good, the cost is reduced to a certain extent, and the mechanical strength is good; when W2/W1 is less than 0.2, the mechanical strength of the rotor core is low, the rotor core is easy to deform, and the reliability of the motor is poor; when W2/W1 is more than 2, the counter potential effect is not obvious, and the efficiency of the motor is not obviously improved.
In any one of the above technical solutions, preferably, two adjacent pole crowns in the second punching sheet are not connected to each other.
In this technical scheme, adjacent two in a plurality of polar crowns of second towards piece are not connected each other, and the second is towards the piece promptly and does not possess the splice bar, can effectively get rid of rotor core part magnetic bridge ascending to the axle, has reduced armature reaction intensity, effectively promotes the anti demagnetization ability of motor, can effectively reduce rotor magnetic leakage through adopting the first towards piece of isostructure and second towards the piece, promotes air gap flux density amplitude, reduces the copper loss, promotes the motor performance.
In any one of the above technical solutions, 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, projections of the connecting ribs of the second sub-stamped sheets and the connecting ribs of the first sub-stamped sheets on a plane perpendicular to the axial direction of the rotor core are completely overlapped.
In the technical scheme, projections of connecting ribs of a plurality of second sub-punching sheets and connecting ribs of a plurality of first sub-punching sheets on a plane perpendicular to the axial direction of the rotor core are completely overlapped, the plurality of 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 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, and the connecting ribs of the first type of second sub-punching sheets do not have the connecting rib region 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, 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 sum satisfies 0.0105(L1+ L) or more and L1 or less and 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, 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 punching sheet and the second punching sheet, so that the plurality of first punching sheets and the plurality of second punching 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, a plurality of first towards piece and a plurality of second towards piece also can adopt other fixed knot to construct in order to connect, as long as do not deviate from the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
In any one of the above technical schemes, when the magnet is a tangential magnetizing magnet, the rivet hole or the riveting buckle is arranged on each of the plurality of polar crowns of the first punching sheet and the second punching sheet, and the rivet hole or the riveting buckle is arranged between two magnets with 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, a plurality of first towards piece and a plurality of second towards piece also can adopt other fixed knot to construct in order to connect, as long as do not deviate from the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
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, 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 magnet be tombarthite magnet, ferrite magnet or tombarthite and ferrite hybrid magnet, wherein, magnet also can be other shapes, and magnet also can be for other material preparation, as long as satisfy the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
According to a second aspect of the present invention, there is provided an electric machine, comprising: the rotor according to any of the above technical solutions has all the beneficial effects of the rotor, and is not described herein again.
In any of the above technical solutions, the motor further includes: the stator body is arranged on the outer side of the rotor in a surrounding manner; 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≤1.17×10-6，5kN·m·m-3≤TPV≤45kN·m·m-3The nominal torque T is expressed in N.m, the internal diameter Di is expressed in mm, and the volumetric torque TPV is expressed in 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 the above technical solution, 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; the coil straddles one stator lobe and is positioned in the stator slot; 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.
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 the utility model discloses a third aspect provides a compressor, its include above-mentioned any technical scheme rotor or motor, consequently have the whole beneficial effect of this rotor or this motor, no longer describe herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, 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 punching of a rotor according to an embodiment of the present invention;
fig. 3 shows a partial enlarged view of the first stamped sheet shown in fig. 2 at a in an embodiment in accordance with the invention;
fig. 4 shows a schematic structural view of a first lamination of a rotor in another embodiment according to the present invention;
fig. 5 shows a schematic structural view of a first lamination of a rotor in a further embodiment according to the present invention;
fig. 6 shows a schematic structural view of a second punching of the rotor in an embodiment according to the present invention;
fig. 7 shows a partial enlarged view of the second stamped sheet shown in fig. 6 at B in an embodiment in accordance with the invention;
fig. 8 shows a schematic structural view of a second lamination of the rotor in another embodiment according to the present invention;
fig. 9 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 10 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 11 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 12 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 13 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 14 shows a schematic structural view of a second lamination of a rotor in accordance with a further embodiment of the present invention;
fig. 15 shows a schematic view of a compressor according to an embodiment of the present invention;
figure 16 shows a plot of the low frequency efficiency of a motor of one embodiment of the present invention versus one embodiment of the related art;
figure 17 shows a plot of low frequency efficiency of a motor in accordance with another embodiment of the present invention compared to one embodiment of the related art;
figure 18 shows a plot of low frequency efficiency of a motor in accordance with yet another embodiment of the present invention compared to one embodiment of the related art;
FIG. 19 shows a plot of low frequency efficiency of a motor in accordance with yet another embodiment of the present invention compared to one embodiment of the related art;
FIG. 20 illustrates a cost comparison graph of an embodiment of the present invention with embodiments of the related art;
fig. 21 is a graph showing the effect and cost comparison between an embodiment of the present invention and an embodiment of the related art.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 15 is:
1 rotor core, 11 magnets, 12 first punching sheets, 13 second punching sheets, 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 to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. 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 15.
According to an aspect of the present invention, a rotor is provided for a motor 2, and includes a plurality of first punching sheets 12 and a plurality of second punching sheets 13, 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 plurality of first punching sheets 12 and the plurality of second punching sheets 13 into a rotor yoke 15 and a plurality of pole crowns 16, the plurality of pole crowns 16 are arranged around the periphery of the rotor yoke 15, and the plurality of openings 14 penetrate through the rotor core 1 in the axial direction to form a plurality of slots 19; the magnets 11 are arranged in the slots 19 in a one-to-one correspondence; each of the 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 ones of the plurality of polar crowns 16, the plurality of openings 14 of the first punching sheets 12 are not communicated with each other, and at least two openings 14 of the plurality of openings 14 of each of the second punching sheets 13 are communicated with each other.
As shown in fig. 1 to 14, the present invention provides a rotor including a plurality of first punching sheets 12, a plurality of second punching sheets 13, a plurality of openings 14, and a plurality of magnets 11, 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 disposed 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 pole crowns 16, the plurality of pole crowns 16 are enclosed in an outer periphery of the rotor yoke 15, the plurality of openings 14 axially penetrate along the rotor core 1 to form a plurality of slots 19, the plurality of magnets 11 are disposed in the plurality of slots 19 in a one-to-one correspondence manner, preferably, the magnets 11 are sheet-shaped or arc-shaped, the magnets 11 are adapted to the slots 19, each of the plurality of first punching sheets 12 includes at least one connecting rib 17, any one of the at least one connecting rib 17 is disposed between two adjacent punching sheets 16, preferably splice bar 17 is connected with rotor yoke 15, and each other do not communicate between a plurality of openings 14 of first punching sheet 12, and two at least openings 14 are linked together in a plurality of openings 14 of each of a plurality of second punching sheets 13, and in addition, magnet 11 of different polarity sets up in opening 14 in turn among a plurality of magnet 11, the utility model provides a first punching sheet 12 mechanical strength with splice bar 17 is higher, and then avoids rotor core 1 to warp and influence motor 2 performance at high-speed rotatory in-process, through two at least openings 14 intercommunication in a plurality of openings 14 with on every second punching sheet 13, and then makes magnet 11 of different polarity communicate through the opening 14 that is linked together, effectively reduces the rotor magnetic leakage, promotes air gap flux density amplitude, reduces the copper consumption, promotes motor 2 performance.
In an embodiment of the present invention, preferably, the minimum radial thickness of the connecting rib 17 of the first punching sheet 12 is W1; each of the second punching sheets 13 comprises at least one connecting rib 17, any one of the at least one connecting rib 17 is arranged between two adjacent ones of the plurality of polar crowns 16, the minimum radial thickness of the connecting rib 17 of the second punching sheet 13 is W2, and the minimum radial thickness is equal to or greater than 0.2 and equal to or less than W2/W1 and equal to or less than 2.
As shown in fig. 2 and 7, in this embodiment, the minimum radial thickness of the connecting ribs 17 of the first punching sheet 12 is W1, each of the second punching sheets 13 includes at least one connecting rib 17, any one of the at least one connecting rib 17 is disposed between two adjacent ones of the plurality of pole caps 16, the minimum radial thickness of the connecting ribs 17 of the second punching sheet 13 is W2, and by defining 0.2 ≤ W2/W1 ≤ 2, the mechanical strength of the rotor core 1 can be ensured, and the rotor core 1 is prevented from being deformed during high-speed rotation on the premise that the motor 2 has good operation performance. Preferably, W2/W1 is 0.6, and at this time, the back electromotive force is high, the efficiency improvement effect of the motor 2 is good, the cost is reduced to a certain extent, and the mechanical strength is good; when W2/W1 is less than 0.2, the mechanical strength of the rotor core 1 is low, the rotor core is easy to deform, and the reliability of the motor 2 is poor; when W2/W1 is more than 2, the counter potential effect is not obvious, and the efficiency improvement of the motor 2 is not obvious.
Fig. 16 shows that when the second punching sheet 13 is adopted, and W2/W1 is 0.6, the low-frequency efficiency of the motor of the embodiment 1 is improved by 0.27 compared with that of the prior art; fig. 17 shows that when the second punching sheet 13 is adopted and the width of the magnet 11 is reduced, and W2/W1 is 0.6, the low-frequency efficiency of the motor of the embodiment 2 is improved by 0.3 compared with the motor of the prior art, and fig. 20 shows that when the second punching sheet 13 is adopted and the width of the magnet 11 is reduced, and W2/W1 is 0.6, the embodiment 2 can effectively reduce the production cost of the motor 2; fig. 18 shows that when all the second punching sheets 13 are adopted and W2/W1 is equal to 1, the low-frequency efficiency of the motor of the embodiment 3 is improved by 0.29 compared with that of the conventional example; fig. 19 shows that when the second punching sheet 13 is adopted at 2/3 in the axial length, the first punching sheet 12 is adopted at 1/3 in the axial length, and W2/W1 is 0.6 in this embodiment 4, the low-frequency efficiency of the motor in this embodiment 4 is improved by 0.25 compared with that in the prior art; fig. 21 is a comparison diagram showing effect difference and cost difference between the embodiment of the present invention and the embodiment of the related art, wherein, under the condition of not greatly affecting the motor efficiency, the embodiment of the present invention can reduce the magnet usage by 3.7% to 15.9% compared with the embodiment of the related art, and when the magnet usage by the embodiment of the present invention is reduced by 3.7% compared with the related art, the motor efficiency difference is 0.31%, and the cost can be reduced by 1.7 yuan; when the magnet consumption of the embodiment of the utility model is reduced by 4.7% compared with the related art, the motor efficiency difference is 0.27%, and the cost can be reduced by 2.1 yuan; when the magnet consumption of the embodiment of the utility model is reduced by 6.5% compared with the related art, the motor efficiency difference is 0.24%, and the cost can be reduced by 2.9 yuan; when the magnet consumption of the embodiment of the utility model is reduced by 9.4% compared with the related art, the motor efficiency difference is 0.18%, and the cost can be reduced by 4.2 yuan; when the utility model discloses an embodiment magnet quantity is compared when reducing 15.9% in correlation technique, and the motor efficiency is undifferentiated, and the cost can reduce 7.2 yuan.
In an embodiment of the present invention, preferably, two adjacent polar crowns 16 of the second punching sheet 13 are not connected to each other.
As shown in fig. 13 and 14, in this embodiment, two adjacent pole caps 16 of the second punching sheet 13 are not connected to each other, that is, the second punching sheet 13 does not have the connecting rib 17, so that a part of magnetic bridges in the axial direction of the rotor core 1 can be effectively removed, the armature reaction strength is reduced, the demagnetization resistance of the motor 2 is effectively improved, the rotor magnetic leakage can be effectively reduced by using the first punching sheet 12 and the second punching sheet 13 with different structures, the air gap flux density amplitude is improved, the copper loss is reduced, and the performance of the motor 2 is improved.
In an embodiment of the present invention, the plurality of first stamped sheets 12 include a plurality of first sub-stamped sheets and a plurality of second sub-stamped sheets, and a connecting rib 17 is disposed between every two adjacent ones of the plurality of polar crowns 16 of each of the plurality of first sub-stamped sheets; each of the multiple polar crowns 16 of each of the multiple second sub-stamped sheets is a first polar crown, one end of the first polar crown is connected with the adjacent polar crown 16 through a connecting rib 17, and the other end of the first polar crown is not connected with the adjacent polar crown 16; the second punching sheet 13 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 13 is clamped between the second sub-punching sheets.
As shown in fig. 2 and 4, in this embodiment, the plurality of first stamped sheets 12 include a plurality of first sub-stamped sheets and a plurality of second sub-stamped sheets, wherein a connecting rib 17 is disposed between two adjacent pole crowns 16 of each of the plurality of first sub-stamped sheets, that is, two pole crowns 16 on the first sub-stamped sheets are connected through the connecting rib 17, so as to ensure the mechanical strength of the first stamped sheets 12 and avoid the influence on the performance of the motor 2 due to the deformation of the rotor core 1 during the high-speed rotation process; each of a plurality of polar crowns 16 of each of a plurality of second sub-lamination is first polar crown, one end of first polar crown is connected with adjacent polar crown 16 through connecting rib 17, the other end of first polar crown is not connected with adjacent polar crown 16, namely, connecting rib 17 is arranged on the second sub-lamination at interval, some polar crowns 16 are connected through connecting rib 17, another some polar crowns 16 are not connected, so on one hand, the second sub-lamination can ensure self mechanical strength under the effect of connecting rib 17, avoid rotor core 1 to deform in the high-speed rotation process and influence motor 2 performance, on the other hand, because not connected between partial polar crowns 16 on the second sub-lamination, can effectively get rid of partial magnetic bridge on the axial direction of rotor core 1, armature reaction action strength is reduced, and demagnetization resistance of motor 2 is effectively promoted. In addition, the second punching sheet 13 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 13 is clamped between the second sub-punching sheets, namely the rotor core 1 is formed by stacking the first sub-punching sheet, the second sub-punching sheet and the second punching sheet 13 with different structures, and the stacking modes of the first sub-punching sheet, the second sub-punching sheet and the second punching sheet 13 are diversified, so that the magnetic flux leakage of the rotor is effectively reduced, the amplitude of the air gap magnetic flux density is improved, the copper loss is reduced, and the performance of the motor 2 is improved.
In an embodiment of the present invention, the projections of the connecting ribs 17 of the second plurality of lamination sheets and the connecting ribs 17 of the first plurality of lamination sheets on the 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 sub-punching sheets and the connecting ribs 17 of the first sub-punching sheets on a plane perpendicular to the axial direction of the rotor core 1 are completely overlapped, the second sub-punching sheets include a first type of second sub-punching sheet and a second type of second sub-punching sheet, a projection sum of the connecting ribs 17 of the first type of second sub-punching sheet and the connecting ribs 17 of the second type of second sub-punching sheet 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 sub-punching sheet on the plane perpendicular to the axial direction of the rotor core 1, that is, the first type of second sub-punching sheet and the second type of second sub-punching sheet are stacked, and the connecting ribs 17 of the first type of second sub-punching sheet are staggered corresponding to the second type of second sub-punching sheet and do not have the connecting rib 17 area stacking. In addition, the second punching sheet 13 is sandwiched between the first sub-punching sheets, and/or the first type of second sub-punching sheet is sandwiched between the first sub-punching sheets, 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, 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 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 sheet 13 are diversified, so that the rotor magnetic leakage is effectively reduced, the air gap magnetic density amplitude is increased, the copper loss is reduced, and the performance of the motor 2 is improved.
The utility model discloses an in the embodiment, the thickness of piling up of a plurality of first sub-punching sheets is L1, and the thickness sum of piling up of a plurality of second punching sheets 13 and a plurality of second sub-punching sheets is L, and satisfies 0.0105(L1+ L) and is less than or equal to L1 and is less than or equal to 0.1(L1+ L).
In this embodiment, the stacking thickness of the first sub-punching sheets is L1, the sum of the stacking thicknesses of the second punching sheets 13 and the second sub-punching sheets is L, and it is satisfied that L1 is not less than 0.1(L1+ L) and not more than 0.0105(L1+ L), and by limiting the sum of the stacking thicknesses of the first sub-punching sheets and the stacking thicknesses of the second punching sheets 13 and the second sub-punching sheets, the rotor magnetic leakage is further reduced, the air gap magnetic 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, when the magnet 11 is a radial magnetizing 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 that the plurality of first punching sheets 12 and the plurality of second punching sheets 13 are connected.
In this embodiment, when the magnet 11 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 by 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, a plurality of first punching sheets 12 and a plurality of second punching sheets 13 also can adopt other fixed knot to construct in order to connect, as long as do not deviate from the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
In an embodiment of the present invention, when the magnet 11 is a tangential magnetizing magnet, 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 11 of the same polarity in the plurality of magnets 11.
As shown in fig. 2 to 14, in this embodiment, when the magnets 11 adopt a tangential 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 rivet hole 184 or the rivet button 182 is located between two magnets 11 of the same polarity in the plurality of magnets 11, 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, a plurality of first punching sheets 12 and a plurality of second punching sheets 13 also can adopt other fixed knot to construct in order to connect, as long as do not deviate from the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
In one embodiment of the present invention, the rivet hole 184 is 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, the magnet 11 is a linear magnet or a V-shaped magnet; and/or the magnet 11 is a rare earth magnet, a ferrite magnet or a rare earth and ferrite mixed magnet.
As shown in fig. 1 to 14, in this embodiment, the magnet 11 is a linear magnet, a V-shaped magnet or a magnet with other shapes, specifically, the magnet 11 may be a radial and tangential hybrid structure, and the slot 19 is adapted to the magnet 11; and/or magnet 11 is tombarthite magnet, ferrite magnet or tombarthite and ferrite hybrid magnet, and wherein, magnet 11 also can be for other shapes, and magnet 11 also can be for other material preparation, as long as satisfy the utility model discloses a design concept then all belongs to the utility model discloses a within the scope of protection.
According to a second aspect of the present invention, there is provided a motor 2, comprising: the rotor according to any of the above embodiments, therefore, has all the advantages of the rotor, and will not be described herein again.
In an embodiment of the present invention, the motor 2 further includes: the stator body is arranged on the outer side of the rotor in a surrounding manner; 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≤1.17×10-6，5kN·m·m-3≤TPV≤45kN·m·m-3The nominal torque T is expressed in N.m, the internal diameter Di is expressed in mm, and the volumetric torque TPV is expressed in 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, in addition, the motor 2 and the compressor 3 which adopt the rotor can effectively reduce the magnetic leakage of the rotor, the utilization rate of the magnet 11 is increased, and the efficiency of the motor 2 is improved.
In an embodiment of the present invention, 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 sidewall of the stator body toward the rotor, each of the plurality of stator slots is disposed between two adjacent ones of the plurality of stator teeth; the coil straddles one stator lobe and is positioned in the stator slot; 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.
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 third aspect of the present invention, there is provided a compressor 3, as shown in fig. 15, comprising the rotor or the motor 2 according to any of the above embodiments, so as to have all the advantages of the rotor or the motor 2, which will not be described herein again.
In the present application, the term "plurality" means two or more unless expressly 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present specification, 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 (13)
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, the openings of the first punching sheets are not communicated with each other, and at least two openings of the openings of each second punching sheet are communicated with each other.
2. The rotor of claim 1,
the minimum radial thickness of the connecting rib of the first punching sheet is W1;
each of the second punching sheets comprises at least one connecting rib, any one of the at least one connecting rib is arranged between two adjacent polar crowns, the minimum radial thickness of the connecting rib of each second punching sheet is W2, and the minimum radial thickness of the connecting rib of each second punching sheet is equal to or greater than 0.2 and equal to or less than W2/W1 and equal to or less than 2.
3. The rotor of claim 1,
two adjacent polar crowns in the second punching sheet are not connected with each other.
4. The rotor of claim 2 or 3,
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.
5. The rotor of claim 4,
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.
6. The rotor of claim 4,
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.
7. The rotor of any one of claims 1 to 3,
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.
8. The rotor of any one of claims 1 to 3,
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.
9. 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.
10. An electric machine, comprising: a rotor according to any one of claims 1 to 9.
11. The electric machine of claim 10, further comprising:
the stator body is arranged on the outer side of the rotor in a surrounding manner; 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，
The nominal torque T is expressed in N.m, the internal diameter Di is expressed in mm, and the volumetric torque TPV is expressed in kN.m.m-3。
12. The electric machine of claim 11,
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.
13. A compressor, comprising:
a rotor as claimed in any one of claims 1 to 9; or
An electric machine as claimed in any one of claims 10 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950566.4U CN208299561U (en) | 2018-06-20 | 2018-06-20 | rotor, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950566.4U CN208299561U (en) | 2018-06-20 | 2018-06-20 | rotor, motor and compressor |
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| CN208299561U true CN208299561U (en) | 2018-12-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019242218A1 (en) * | 2018-06-20 | 2019-12-26 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| CN110620451A (en) * | 2018-06-20 | 2019-12-27 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| CN114726125A (en) * | 2021-01-06 | 2022-07-08 | 上海海立电器有限公司 | Rotor punching sheet, motor rotor and motor |
| CN116827014A (en) * | 2023-06-21 | 2023-09-29 | 浙江大学 | A kind of magnetic bridge rotor structure for synchronous motor |
-
2018
- 2018-06-20 CN CN201820950566.4U patent/CN208299561U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019242218A1 (en) * | 2018-06-20 | 2019-12-26 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| CN110620451A (en) * | 2018-06-20 | 2019-12-27 | 广东美芝制冷设备有限公司 | Rotor, motor and compressor |
| CN110620451B (en) * | 2018-06-20 | 2024-06-21 | 广东美芝制冷设备有限公司 | Rotors, motors and compressors |
| US12021414B2 (en) | 2018-06-20 | 2024-06-25 | Guangdong Meizhi Compressor Co., Ltd. | Rotor, electric motor and compressor |
| CN114726125A (en) * | 2021-01-06 | 2022-07-08 | 上海海立电器有限公司 | Rotor punching sheet, motor rotor and motor |
| CN116827014A (en) * | 2023-06-21 | 2023-09-29 | 浙江大学 | A kind of magnetic bridge rotor structure for synchronous motor |
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