CN210041480U - Motor rotor, motor and compressor - Google Patents
Motor rotor, motor and compressor Download PDFInfo
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- CN210041480U CN210041480U CN201921064668.7U CN201921064668U CN210041480U CN 210041480 U CN210041480 U CN 210041480U CN 201921064668 U CN201921064668 U CN 201921064668U CN 210041480 U CN210041480 U CN 210041480U
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- 238000004080 punching Methods 0.000 claims abstract description 60
- 230000005389 magnetism Effects 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 125000006850 spacer group Chemical group 0.000 claims description 20
- 238000002955 isolation Methods 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 12
- 230000004907 flux Effects 0.000 claims description 12
- 238000003475 lamination Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 230000010349 pulsation Effects 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides an electric motor rotor, motor and compressor. The motor rotor includes: the rotor punching sheet comprises at least two rotor punching sheets which are overlapped and fixed together, each rotor punching sheet is provided with a magnetism isolating hole, the magnetism isolating holes in each rotor punching sheet are arranged along the same straight line, and the cross sectional areas of the magnetism isolating holes in each rotor punching sheet are different. Because the utility model provides a separate the magnetism hole on each rotor punching along same sharp setting, and each rotor punching on separate the cross-sectional area of magnetism hole different, utilize the disparity of separating the magnetism hole cross-sectional area on the adjacent rotor punching, make the magnet steel of normally placing produce the effect of oblique utmost point, wrong utmost point, and then reduced the harmonic in the motor air gap, reduce motor torque pulsation, improve motor electromagnetic noise, simple structure, the equipment of being convenient for.
Description
Technical Field
The utility model relates to a compressor arrangement technical field particularly, relates to an electric motor rotor, motor and compressor.
Background
For air conditioning products, besides paying attention to the cooling effect, noise is also a key for evaluating a product, and the generation of the noise seriously affects the experience of a user. The noise is mainly generated during the operation of the air conditioner by mechanical noise, aerodynamic noise, electromagnetic noise, etc., wherein the electromagnetic noise is excited by electromagnetic harmonics generated during the operation of a driving motor of the compressor.
At present, in order to solve the problems, the rotor magnetic steel is usually set to be oblique or staggered to reduce the noise of the motor, but the mass production is difficult, and a stamping die is easy to damage and has a shortened service life.
Along with the promotion of compressor number, to motor output torque demand higher and higher, lead to the motor to stack the height and constantly rise, and the increase of iron core length, motor power increases, and motor shaft is more and more slender, and this can produce adverse effect to motor axiality and amount of deflection, and not only motor shaft bending deformation grow, and electrical property variation moreover. In severe cases, the phenomenon of sweeping the chamber (real wiping) is generated, even high temperature is generated locally in the inner circle of the stator, so that insulation in the slot is burnt and loses efficacy, the grounding or short circuit of the winding is caused, and meanwhile vibration is caused, so that the noise of the motor is increased.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide an electric motor rotor, an electric motor and a compressor, which solve the problem that the electric motor in the prior art is difficult to assemble and has large noise.
In order to achieve the above object, according to an aspect of the present invention, there is provided an electric motor rotor including: the rotor punching sheet comprises at least two rotor punching sheets which are overlapped and fixed together, each rotor punching sheet is provided with a magnetism isolating hole, the magnetism isolating holes in each rotor punching sheet are arranged along the same straight line, and the cross sectional areas of the magnetism isolating holes in each rotor punching sheet are different.
Furthermore, a magnetic steel groove is formed in the rotor punching sheet, and the magnetism isolating hole is located in one side, away from the center of the rotor punching sheet, of the magnetic steel groove.
Further, the magnetism isolating holes in the rotor punching sheets are arranged along a straight line parallel to the axis of the motor rotor.
Furthermore, the cross-sectional area of the magnetism isolating hole on each rotor punching sheet is gradually increased along the direction from the first end to the second end of the motor rotor, and the projection of the magnetism isolating hole with the smaller cross-sectional area at the end part of the motor rotor is contained in the magnetism isolating hole with the larger cross-sectional area.
Furthermore, in two adjacent rotor sheets, the cross-sectional area of the magnet-isolating hole with the larger cross-sectional area is S1, and the cross-sectional area of the magnet-isolating hole with the smaller cross-sectional area is S2, wherein S2 is greater than 1/3S 1.
Furthermore, the magnetism isolating holes in the rotor punching sheets are kidney-shaped holes, the width of each kidney-shaped hole is gradually increased along the direction from the first end to the second end of the motor rotor, in two adjacent rotor punching sheets, the width of the wider kidney-shaped hole is a, the width of the narrower kidney-shaped hole is b, and a/2 is less than b.
Furthermore, the number of the magnetism isolating holes in each pole of each rotor punching sheet is x, the number of the rotor punching sheets is y, the number of the poles of the motor rotor is p, and x-p +1 is y.
Furthermore, the number x of the magnetism isolating holes in each pole of each rotor punching sheet is 5, the number p of poles of the motor rotor is 3, and the number y of blocks of the rotor punching sheet is 3.
Further, along the direction from the first end to the second end of the motor rotor, the thickness of the rotor punching sheet is gradually reduced.
Further, the motor rotor further comprises a spacer, the spacer is arranged between two adjacent rotor punching sheets, and a notch portion is arranged at a position corresponding to the magnetism isolating hole of the spacer.
Further, the spacer has a thickness in a range of 4mm to 6 mm.
According to another aspect of the utility model, a motor is provided, including electric motor rotor, electric motor rotor is foretell electric motor rotor.
According to another aspect of the present invention, there is provided a compressor, including a motor, the motor is the above-mentioned motor.
Use the technical scheme of the utility model, because the utility model provides an each rotor is towards the last magnetism isolating hole of piece and is set up along same straight line, and each rotor is different towards the cross-sectional area of the last magnetism isolating hole of piece, utilizes the disparity of the magnetism isolating hole cross-sectional area of adjacent rotor towards the piece, makes the magnet steel of normally placing produce oblique utmost point, wrong polar effect, and then has reduced the harmonic in the motor air gap, reduces motor torque pulsation, improves motor electromagnetic noise, simple structure, the equipment of being convenient for.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 schematically shows a perspective view of an electric machine rotor according to the invention;
fig. 2 schematically shows a front view of a rotor sheet according to the present invention;
FIG. 3 schematically illustrates a front view of a spacer of the present invention;
fig. 4 schematically shows a comparison graph of the sizes of the magnetic isolation holes on each rotor sheet from the first end to the second end of the rotor sheet according to the present invention;
figure 5 schematically shows a cross-sectional view of an electric machine rotor according to the invention;
fig. 6 schematically shows a back electromotive force comparison diagram of the motor rotor of the present invention with a conventional motor rotor;
fig. 7 schematically shows a torque ripple comparison diagram of the motor rotor of the present invention and a conventional motor rotor.
Wherein the figures include the following reference numerals:
10. rotor punching sheets; 11. a magnetism isolating hole; 12. a magnetic steel groove; 20. a spacer; 21. a notch portion.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Referring to fig. 1 to 7, according to the embodiment of the present invention, a motor is provided, the motor includes a motor rotor, the motor rotor includes at least two rotor sheets 10, the above-mentioned at least two rotor sheets 10 are stacked and fixed together, each rotor sheet 10 is provided with a magnetic isolation hole 11 along a straight line, and the cross-sectional areas of the magnetic isolation holes 11 on each rotor sheet 10 are different.
Because the magnetic isolation holes 11 on each rotor punching sheet 10 in the embodiment are arranged along the same straight line, and the cross-sectional areas of the magnetic isolation holes 11 on each rotor punching sheet 10 are different, the magnetic steel which is normally placed generates the effects of oblique poles and staggered poles by utilizing the difference of the cross-sectional areas of the magnetic isolation holes 11 on the adjacent rotor punching sheets 10, so that the harmonic waves in the air gap of the motor are reduced, the torque pulsation of the motor is reduced, the electromagnetic noise of the motor is improved, the structure is simple, and the assembly is convenient.
The cross-sectional area of the magnet isolation hole 11 in the present embodiment refers to a cross-section cut perpendicular to the axis of the motor rotor.
Be provided with magnet steel slot 12 on the rotor punching 10, during actual design, should separate magnetic hole 11 and be located magnet steel slot 12 and keep away from one side at rotor punching 10 center, the outside of magnet steel slot 12 promptly, separate magnetic hole 11 on each rotor punching 10 and arrange along the straight line that is on a parallel with the electric motor rotor axis, be convenient for improve electric motor rotor's in this embodiment production efficiency, reduce electric motor rotor's the assembly degree of difficulty.
Referring to fig. 1 to 5, in the present embodiment, the cross-sectional area of the flux barriers 11 on each rotor lamination 10 gradually increases along a direction from the first end to the second end of the motor rotor, and a projection of the flux barrier 11 with a smaller cross-sectional area at the end of the motor rotor is included in the flux barrier 11 with a larger cross-sectional area, and in two adjacent rotor laminations 10, the cross-sectional area of the flux barrier 11 with a larger cross-sectional area is S1, and the cross-sectional area of the flux barrier 11 with a smaller cross-sectional area is S2, where S2 is greater than 1/3S1, which is convenient for enabling normally placed magnetic steel to generate an oblique pole and a wrong pole effect, and effectively reduces harmonics in the air gap of the motor.
The first end to second end direction in this embodiment refers to a bottom end to top end direction when the motor is used in a compressor, such as the bottom end to top end direction shown in fig. 1.
The magnetic isolation holes 11 on each rotor punching sheet 10 in the embodiment are waist-shaped holes, the width of each waist-shaped hole gradually increases from the first end to the second end of the motor rotor, in two adjacent rotor punching sheets 10, the width of the wider waist-shaped hole is a, and the width of the narrower waist-shaped hole is b, wherein a/2 is less than b, so that the normally placed magnetic steel can generate oblique pole and staggered pole effects, the harmonic waves in the air gap of the motor are effectively reduced, the torque pulsation of the motor is reduced, and the electromagnetic noise of the motor is improved.
Of course, in other embodiments of the present invention, the magnetism isolating hole 11 can be set to be a circular hole, a triangular hole, a special-shaped hole, etc., as long as it is in other deformation modes under the concept of the present invention, all are within the protection scope of the present invention.
Preferably, in this embodiment, the number of the flux barriers 11 on each pole of each rotor sheet 10 is x, the number of the rotor sheets 10 is y, and the number of the poles of the motor rotor is p, where x-p +1 is y.
More preferably, in this embodiment, the number x of the magnetism isolating holes 11 on each pole of each rotor sheet 10 is 5, the number p of poles of the motor rotor is 3, and the number y of the rotor sheets 10 is 3.
The motor rotor in the embodiment is formed by axially laminating 3 types of rotor punching sheets 10, the formed oblique pole effect is the best, and the process is the simplest and the simplest.
Preferably, along the direction of motor rotor first end to second end, the thickness of rotor punching 10 diminishes gradually, and such mode of setting can make the focus of motor lean on down when using the motor in the compressor, reduces motor rotor's focus, can reduce the bent axle and warp, thereby improves motor axiality, reduces the risk that the motor swept the chamber.
Referring to fig. 1 to 5 again, the motor rotor in the present embodiment further includes a spacer 20, the spacer 20 is disposed between two adjacent rotor sheets 10, and a notch portion 21 is disposed at a position of the spacer 20 corresponding to the magnetism isolating hole 11. Through the effect of this breach portion 21, be convenient for enclose with the rotor punching 10 of spacer 20 upper and lower both sides and establish a jet, when using the motor in the compressor, can follow the stator that the internal passage of electric motor rotor spouts the radial direction with the air current of compressor pump body spun, make the air current take away a part of heat in the stator winding to make the motor stator accelerate the heat dissipation.
Preferably, the thickness of the spacer 20 in this embodiment is in the range of 4mm to 6mm, for example 5 mm. The condition that the magnetic leakage of the motor rotor is overlarge is avoided, and the performance of the motor is reduced.
When the rotor punching sheets 10 are laminated, one of the rotor punching sheets 10 with larger thickness is placed at the lowermost layer, and is laminated from bottom to top according to the modes shown in fig. 1 and fig. 5, and different rotor punching sheets 10 are laminated according to a certain proportion, wherein the proportion of the rotor punching sheet 10 with the thickest thickness in the whole rotor punching sheet 10 exceeds 1/3; the exhaust part of the spacer 20 formed by laminating in the motor rotor is not higher than 5mm, otherwise, the motor magnetic leakage is overlarge, the performance of the motor is linearly reduced, the gravity center of the rotor can be reduced by stacking according to the proportion, the deformation of a long shaft is reduced, and the deflection is reduced.
According to the utility model discloses an embodiment provides an electric motor rotor as follows:
in this embodiment, the total stack height of the rotor core is 80mm, 6 poles are required, and one pole is to 5 magnet isolation holes 11, so there are three rotor sheets 10 except for the spacer 20, and the specific implementation mode is as follows: the rotor punching sheet 10 with the thickest thickness is placed at the lowest layer of the iron core, the rotor punching sheet 10 is superposed to the height of 30mm, then the spacer 20 is used for laminating, the second rotor punching sheet 10 is replaced when the whole 34mm is laminated, the rotor iron core is integrally laminated to 54mm, the second rotor punching sheet 10 is stopped to be used, and namely the partial height of the second rotor punching sheet 10 is 20 mm. In the same way, the spacer 20 is used for laminating until the height of the iron core is 58mm, and finally the third rotor punching sheet 10 is used for laminating until the height of the third rotor punching sheet is 80 mm.
As a whole, the magnetic isolation holes 11 corresponding to each pole are overlapped on one side of the projection of the bottom surface, and the projection of the magnetic isolation hole 11 at the smaller end to the bottom surface is completely contained in the adjacent larger magnetic isolation hole 11, so that the magnetic steel vertically placed can generate the effect of oblique poles or staggered poles, and as shown in fig. 6 and 7, the back electromotive force of the embodiment is more sinusoidal than that of a normal rotor and has smaller torque pulsation.
After the motor rotor in the embodiment is used in a compressor, gas is ejected from a pump body, and then flows towards a rotor core, and enters the motor rotor along the magnet-isolating holes 11 of the rotor sheets 10, when the gas flows to the boundary between the first rotor sheet 10 and the second rotor sheet 10, because the magnet-isolating holes 11 of the second rotor sheet 10 are smaller than the cross-sectional area of the magnet-isolating holes 11 of the first rotor sheet 10, part of the gas is shunted, and is ejected from the notch 21 on the spacer 20.
According to the utility model discloses a further aspect provides a compressor, and this compressor includes the motor, and the motor is the motor in the above-mentioned embodiment.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
(1) by utilizing the special upper and lower space structures of the rotor, the normally placed magnetic steel generates the effects of oblique poles and staggered poles, so that the harmonic waves in the air gap of the motor are reduced, the torque pulsation of the motor is reduced, and the electromagnetic noise of the motor is improved;
(2) the rotor is light on the top and heavy on the bottom, the gravity center of the rotor is reduced, the deformation of a crankshaft is reduced, and the deflection is reduced, so that the coaxiality of the motor is improved, and the risk of sweeping the chamber of the motor is reduced;
(3) and the cutting edge is arranged outside the rotor, and the stator winding is cooled by utilizing the upward airflow of the pump body, so that the reliability of the compressor is improved, the service life is prolonged, and the noise is reduced.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
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. An electric machine rotor, comprising:
the rotor punching sheet comprises at least two rotor punching sheets (10) which are overlapped and fixed together, wherein each rotor punching sheet (10) is provided with a magnetic isolation hole (11), the magnetic isolation holes (11) in each rotor punching sheet (10) are arranged along the same straight line, and the cross-sectional areas of the magnetic isolation holes (11) in each rotor punching sheet (10) are different.
2. The motor rotor as recited in claim 1, wherein a magnetic steel groove (12) is formed in the rotor punching sheet (10), and the magnetism isolating hole (11) is located on one side, away from the center of the rotor punching sheet (10), of the magnetic steel groove (12).
3. The electric machine rotor as recited in claim 1, characterized in that the flux barriers (11) on each rotor sheet (10) are arranged along a line parallel to the electric machine rotor axis.
4. The motor rotor as recited in claim 1, characterized in that the cross-sectional area of the flux barriers (11) on each rotor punching sheet (10) is gradually increased along the direction from the first end to the second end of the motor rotor, and the projection of the flux barriers (11) with smaller cross-sectional area at the end of the motor rotor is contained in the flux barriers (11) with larger cross-sectional area.
5. The motor rotor as recited in claim 4, wherein in two adjacent rotor sheets (10), the cross-sectional area of the magnet isolation hole (11) with the larger cross-sectional area is S1, and the cross-sectional area of the magnet isolation hole (11) with the smaller cross-sectional area is S2, wherein S2 is greater than 1/3S 1.
6. The motor rotor as recited in claim 1, wherein the magnetism isolating holes (11) on each rotor punching sheet (10) are kidney-shaped holes, the width of the kidney-shaped holes gradually increases along the direction from the first end to the second end of the motor rotor, and in two adjacent rotor punching sheets (10), the width of the wider kidney-shaped hole is a, and the width of the narrower kidney-shaped hole is b, wherein a/2 < b.
7. The motor rotor as claimed in claim 1, wherein the number of the flux barriers (11) on each pole of each rotor sheet (10) is x, the number of the rotor sheets (10) is y, and the number of the poles of the motor rotor is p, wherein x-p +1 ═ y.
8. The motor rotor as recited in claim 7, wherein the number x of the flux barriers (11) on each pole of each rotor lamination (10) is 5, the number p of poles of the motor rotor is 3, and the number y of the rotor laminations (10) is 3.
9. An electric machine rotor according to claim 1, characterised in that the thickness of the rotor sheet (10) is tapered in the direction from the first end to the second end of the electric machine rotor.
10. The motor rotor as claimed in any one of claims 1 to 9, further comprising a spacer (20), wherein the spacer (20) is arranged between two adjacent rotor punching sheets (10), and a notch part (21) is arranged at a position of the spacer (20) corresponding to the magnetism isolating hole (11).
11. An electric machine rotor, according to claim 10, characterized in that the thickness of the spacers (20) is in the range of 4mm to 6 mm.
12. An electric machine comprising a machine rotor, characterized in that the machine rotor is a machine rotor according to any one of claims 1-11.
13. A compressor comprising an electric motor, wherein said electric motor is as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064668.7U CN210041480U (en) | 2019-07-09 | 2019-07-09 | Motor rotor, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064668.7U CN210041480U (en) | 2019-07-09 | 2019-07-09 | Motor rotor, motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210041480U true CN210041480U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921064668.7U Active CN210041480U (en) | 2019-07-09 | 2019-07-09 | Motor rotor, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210041480U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212669A (en) * | 2019-07-09 | 2019-09-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor, motor and compressor |
| CN112865363A (en) * | 2020-12-28 | 2021-05-28 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor and compressor |
-
2019
- 2019-07-09 CN CN201921064668.7U patent/CN210041480U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212669A (en) * | 2019-07-09 | 2019-09-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor, motor and compressor |
| CN112865363A (en) * | 2020-12-28 | 2021-05-28 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor and compressor |
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