CN110768421A - Rotor of permanent magnet motor, permanent magnet motor and compressor - Google Patents
Rotor of permanent magnet motor, permanent magnet motor and compressor Download PDFInfo
- Publication number
- CN110768421A CN110768421A CN201810843973.XA CN201810843973A CN110768421A CN 110768421 A CN110768421 A CN 110768421A CN 201810843973 A CN201810843973 A CN 201810843973A CN 110768421 A CN110768421 A CN 110768421A
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- Prior art keywords
- permanent magnet
- rotor
- magnet
- groove
- magnetism isolating
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- 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]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor of a permanent magnet motor, the permanent magnet motor and a compressor, wherein the rotor comprises a rotor iron core and a plurality of permanent magnets, the rotor iron core is provided with a central hole and a plurality of magnet grooves, the plurality of magnet grooves are distributed along the circumferential direction of the central hole, each magnet groove extends along the radial direction of the central hole, and the parts of each magnet groove, which are positioned at the two radial ends of each permanent magnet, form a first magnetism isolating groove. And in two adjacent magnetic field passages in the radial direction, the minimum width of the magnetic field passage positioned on the radial outer side is smaller than the minimum width of the magnetic field passage positioned on the radial inner side. According to the permanent magnet motor disclosed by the embodiment of the invention, the magnetizing characteristic of the rotor core is improved, and the noise of the permanent magnet motor is reduced.
Description
Technical Field
The invention relates to the field of compressors, in particular to a rotor of a permanent magnet motor, the permanent magnet motor and a compressor.
Background
The embedded permanent magnet motor is divided into a radial magnetic flux structure and a tangential magnetic flux structure according to the magnetic flux direction. The permanent magnet in the rotor is arranged along the radial extension of the rotor. The permanent magnet motor with the tangential magnetic flux structure has the advantages that the two working faces of the permanent magnet are directly facing the air gap, and compared with a radial magnetic flux structure, the tangential magnetic flux structure is higher in magnetic flux utilization rate, and high efficiency and miniaturization are achieved.
However, one end of the permanent magnet of the tangential flux structure extends into the vicinity of the inner hole of the rotor, and the permanent magnet is difficult to saturate after being inserted into the rotor, so that the problem is one of the technical problems of the tangential flux structure motor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a rotor of a permanent magnet motor, which can improve the magnetizing characteristic and is beneficial to the magnetizing magnetic field to penetrate into the rotor.
The invention also aims to provide a permanent magnet motor with the rotor of the permanent magnet motor.
The invention also aims to provide a compressor with the permanent magnet motor.
According to the embodiment of the invention, the rotor of the permanent magnet motor comprises: the rotor core is provided with a central hole and a plurality of magnet grooves, the magnet grooves are distributed along the circumferential direction of the central hole, and each magnet groove extends along the radial direction of the central hole; the permanent magnets are inserted into the magnet grooves in a one-to-one correspondence mode, and at least one first magnetism isolating groove is formed in each magnet groove and is located at two radial ends of each permanent magnet; in addition, the rotor core is provided with a second magnetism isolating groove on at least one side of the circumferential direction of each magnet groove, the second magnetism isolating groove divides a single-side area into a plurality of magnetic field passages distributed along the radial direction, the single-side area is an area between the circumferential edge of the central hole and the outer circumferential edge of the rotor core and corresponds to the second magnetism isolating groove, and in at least one group of two magnetic field passages adjacent in the radial direction, the minimum width of the magnetic field passage positioned on the outer side in the radial direction is smaller than the minimum width of the magnetic field passage positioned on the inner side in the radial direction.
According to the rotor of the permanent magnet motor, the rotor core is provided with the second magnetism isolating groove at least on one side of the circumferential direction of each magnet groove, the second magnetism isolating groove divides the single-side area into the plurality of magnetic field passages distributed along the radial direction, and in two adjacent magnetic field passages along the radial direction, the minimum width of the magnetic field passage positioned on the radial outer side is smaller than the minimum width of the magnetic field passage positioned on the radial inner side, so that the magnetizing of the magnetizing magnetic field with the outer periphery of the rotor core penetrating into the inner periphery of the rotor is facilitated, the rotor core near one end of the permanent magnet close to the center hole is ensured to be magnetized, the magnetizing characteristic of the rotor core is improved, in addition, the air gap magnetic density waveform of the permanent magnet motor can be improved, the harmonic content is reduced, and the noise of the permanent magnet.
In some embodiments, each of the magnet slots is provided with a plurality of second magnetism isolating slots on both sides in the circumferential direction, and the second magnetism isolating slots on one side in the circumferential direction of each of the magnet slots are distributed at intervals in the radial direction.
In some specific embodiments, a cross section of each of the second magnetism isolating grooves is formed in a parallelogram shape, and among the plurality of second magnetism isolating grooves on one side of the circumferential direction of each of the magnet grooves, side edges of two sides of the plurality of second magnetism isolating grooves in the circumferential direction are respectively coplanar.
In some more specific embodiments, an included angle between the second magnetism isolating groove and the magnet groove toward the outer circumferential edge of the rotor core is an acute angle.
In some embodiments, a magnetic bridge is arranged between the second magnetism isolating groove and the adjacent magnet groove.
In some embodiments, the second magnetism isolating groove is communicated with the adjacent magnet groove.
In some embodiments, the first magnetism isolating groove located on the radially inner side of the permanent magnet has an elongated protrusion protruding radially outward on the inner wall facing the center of the rotor core.
In some embodiments, the permanent magnet is a rare earth permanent magnet or a ferrite permanent magnet.
A permanent magnet machine according to an embodiment of the invention comprises a rotor of the permanent magnet machine of the preceding paragraphs.
According to the permanent magnet motor provided by the embodiment of the invention, as the rotor of the permanent magnet motor is arranged, the working noise of the permanent magnet motor is reduced, and the working efficiency of the permanent magnet motor is improved.
The compressor comprises the permanent magnet motor.
According to the permanent magnet motor provided by the embodiment of the invention, due to the arrangement of the permanent magnet motor, the working noise of the compressor is reduced, and the working efficiency of the compressor is improved.
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 is a schematic structural view of a rotor of a permanent magnet motor according to a first embodiment of the present invention;
FIG. 2 is a schematic illustration of the core saturation level of the rotor of FIG. 1 during magnetization;
fig. 3 is a schematic structural view of a rotor of a second embodiment of the present invention;
FIG. 4 is a schematic diagram of the air gap flux density of the permanent magnet machine of the present invention in comparison to the prior art;
fig. 5 is a schematic structural diagram of a permanent magnet motor according to an embodiment of the present invention;
fig. 6 is a schematic mechanism diagram of a compressor according to an embodiment of the present invention.
Reference numerals:
a compressor 1,
A permanent magnet motor 10,
A rotor 100,
A rotor core 110,
A magnet groove 111,
A first magnetism isolating groove 112,
A projection 1121,
A second magnetism isolating groove 113,
A magnetic field path 114,
An inner magnetic field path 114a, an outer magnetic field path 114b,
A central hole 115,
A permanent magnet 120.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "width", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
A specific structure of a rotor 100 of a permanent magnet motor according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1 to 3, a rotor 100 of a permanent magnet motor according to an embodiment of the present invention includes a rotor core 110 and a plurality of permanent magnets 120, the rotor core 110 has a central hole 115 and a plurality of magnet slots 111, the plurality of magnet slots 111 are arranged along a circumferential direction of the central hole 115, each magnet slot 111 extends in a radial direction of the central hole 115, the plurality of permanent magnets 120 are inserted into the plurality of magnet slots 111 in a one-to-one correspondence, and at least one first magnetism isolating slot 112 is formed at each of the magnet slots 111 at both ends in the radial direction of each permanent magnet 120.
The rotor core 110 is provided with a second magnetism isolating groove 113 on at least one side of the circumferential direction of each magnet groove 111, the second magnetism isolating groove 113 divides a single-side area into a plurality of magnetic field passages 114 distributed along the radial direction, the single-side area is an area between the circumferential edge of the central hole 115 and the outer circumferential edge of the rotor core 110 and corresponding to the second magnetism isolating groove 113, and in at least one group of two magnetic field passages 114 adjacent along the radial direction, the minimum width of the magnetic field passage 114 positioned on the outer side in the radial direction is smaller than the minimum width of the magnetic field passage 114 positioned on the inner side in the radial direction.
It is noted that since each magnet slot 111 extends in a radial direction of the central bore 115, that is to say the rotor 100 of the present invention belongs to a tangential flux rotor 100.
It can be understood that, assuming that one second magnetism isolating groove 113 is provided at one axial side of each magnet groove 111 of the rotor core 110, the second magnetism isolating groove 113 divides a region between the circumferential edge of the central hole 115 where it is located and the outer circumferential edge of the rotor core 110, corresponding thereto, into two magnetic field paths 114, and of the two magnetic field paths 114, the minimum width of the magnetic field path 114 at the radially outer side is smaller than the minimum width of the magnetic field path 114 at the radially inner side. The structure can lead the outer periphery of the rotor core 110 to be magnetized and saturated first, thereby being beneficial to the magnetizing of the magnetizing magnetic field with the outer periphery of the rotor core 110 extending into the inner periphery of the rotor 100, ensuring the magnetizing of the rotor core 110 near one end of the permanent magnet 120 close to the central hole 115 and improving the magnetizing characteristic of the rotor core 110.
In addition, the rotor 100 of the present invention can also improve the air gap flux density of the permanent magnet motor 10, as shown in fig. 4, the air gap flux density of the permanent magnet motor of the prior art is a square wave with pits, and the harmonic content is large, which may cause a problem of large noise of the motor. By adopting the permanent magnet motor 10 with the structure, the air gap flux density waveform is obviously improved, and the harmonic content is reduced, so that the noise of the permanent magnet motor 10 is improved.
Here, the region corresponding to the second magnetism isolating groove 113 between the peripheral edge of the center hole 115 and the outer peripheral edge of the rotor core 110 is a region surrounded by the axis of the center hole 115 and the outer peripheral edge of the rotor core 110 and the tangent line of two outermost points of the second magnetism isolating groove 113 in the circumferential direction. It is additionally emphasized here that the region between the peripheral edge of the center hole 115, which is not interrupted by the second magnetism isolating groove 113, and the outer peripheral edge of the rotor core 110 cannot be referred to as a one-sided region.
The minimum width of the magnetic field path 114 is a distance between the outermost point in the radial direction of the second magnetism isolating groove 113 and the outer peripheral edge of the rotor core 110, or a distance between the innermost point in the radial direction of the second magnetism isolating groove 113 and the peripheral edge of the center hole 115. Further alternatively, when there are a plurality of second magnetism isolating grooves 113, the minimum width of the magnetic field path 114 is the distance between the outermost radial side of the second magnetism isolating groove 113 and the radially outer adjacent second magnetism isolating groove 113, or the distance between the innermost radial side of the second magnetism isolating groove 113 and the radially inner adjacent second magnetism isolating groove 113.
According to the rotor 100 of the permanent magnet motor of the embodiment of the invention, the rotor core 110 is provided with the second magnetism isolating groove 113 at least on one side of the circumferential direction of each magnet groove 111, the second magnetism isolating groove 113 divides the single-side area into the plurality of magnetic field passages 114 distributed along the radial direction, and in two adjacent magnetic field passages 114 along the radial direction, the minimum width of the magnetic field passage 114 located on the radial outer side is smaller than the minimum width of the magnetic field passage 114 located on the radial inner side, so that the magnetizing of the magnetizing magnetic field is facilitated to enable the outer periphery of the rotor core 110 to penetrate into the inner periphery of the rotor 100, the rotor core 110 near one end of the permanent magnet 120 close to the central hole 115 is ensured to be magnetized, the magnetizing characteristic of the rotor core 110 is improved, in addition, the air gap magnetic density waveform of the permanent magnet motor 10 can be improved, the harmonic content is reduced.
In some embodiments, as shown in fig. 1 to 3, each of the magnet grooves 111 is provided with a plurality of second magnetism isolating grooves 113 on both circumferential sides thereof, and the plurality of second magnetism isolating grooves 113 on one circumferential side of each of the magnet grooves 111 are spaced apart in the radial direction. Thereby, the air gap flux density of the permanent magnet motor 10 can be further improved, thereby reducing the low noise of the permanent magnet motor 10
In some specific embodiments, the cross section of each second magnetism isolating groove 113 is formed into a parallelogram, and among the plurality of second magnetism isolating grooves 113 on one side of the circumference of each magnet groove 111, the sides of both sides of the circumference of the plurality of second magnetism isolating grooves 113 are coplanar respectively, and the sides of both sides of the circumference of each second magnetism isolating groove 113 are parallel to the magnet groove 111. Thereby, the air gap flux density of the permanent magnet motor 10 can be further improved, thereby reducing the low noise of the permanent magnet motor 10
In some more specific embodiments, as shown in fig. 1 to 3, an included angle between the second magnetism isolating groove 113 and the magnet groove 111 toward the outer circumferential edge of the rotor core 110 is an acute angle, and a plurality of acute angles formed in the plurality of second magnetism isolating grooves 113 on one circumferential side of each magnet groove 111 gradually increases in an inside-out direction. Thereby, the air gap flux density of the permanent magnet motor 10 can be further improved, thereby reducing the low noise of the permanent magnet motor 10.
Here, the second magnetism isolating grooves 113 are not limited to the parallelogram shape, and may have other shapes such as a circle, a triangle, and an irregular shape.
In some embodiments, as shown in fig. 1-2, a magnetic bridge is provided between the second magnetism isolating groove 113 and the adjacent magnet groove 111. A magnetic bridge is arranged between the second magnetism isolating groove 113 and the magnet groove 111, so that the air gap magnetic density of the permanent magnet motor 10 can be ensured, and the magnetic flux utilization rate of the permanent magnet 120 is improved.
In some embodiments, as shown in FIG. 3, the second magnetism isolating groove 113 communicates with its adjacent magnet groove 111. Thus, the manufacturing of the rotor core 110 can be facilitated.
In some embodiments, as shown in fig. 1 to 3, the first magnetism isolating groove 112 located at the radially inner side of the permanent magnet 120 has an elongated protrusion 1121 protruding radially outward on the inner wall toward the center of the rotor core 110. Because the radial inner side of the permanent magnet 120 is provided with the central hole 115, the inner wall of the first magnetism isolating groove 112 facing the center of the rotor core 110 is provided with the elongated protrusion 1121 protruding along the radial outer side, which can improve the strength of the magnetic bridge between the first magnetism isolating groove 112 and the central hole 115, and avoid the phenomenon of breaking the magnetic bridge when the rotor 100 rotates. It should be noted that the elongated protrusions 1121 function to enhance the strength. Therefore, the shape of the projection 1121 is not limited to a long bar shape but may be any other shape.
In some embodiments, the permanent magnet 120 is a rare earth permanent magnet 120 or a ferrite permanent magnet 120.
Example (b):
a rotor 100 of a permanent magnet electric machine according to an embodiment of the present invention is described below with reference to fig. 1-2.
As shown in fig. 1, a rotor 100 of the permanent magnet motor of the present embodiment includes a rotor core 110 and ten permanent magnets 120, the rotor core 110 has a central hole 115 and ten magnet slots 111, the ten magnet slots 111 are arranged in a circumferential direction of the central hole 115, each magnet slot 111 extends in a radial direction of the central hole 115, the ten permanent magnets 120 are inserted in the plurality of magnet slots 111 in a one-to-one correspondence, and portions of each magnet slot 111 located at both ends in the radial direction of each permanent magnet 120 form first flux barriers 112. The first flux barrier 112 located on the radially inner side of the permanent magnet 120 has an elongated projection 1121 protruding radially outward on the inner wall thereof toward the center of the rotor core 110.
The rotor core 110 is provided with two second magnetism isolating grooves 113 at two sides of each magnet groove 111 in the circumferential direction, the two second magnetism isolating grooves 113 divide a single-side area where the two second magnetism isolating grooves 113 are located into three magnetic field passages 114 distributed along the radial direction, the single-side area is an area between the circumferential edge of the central hole 115 and the outer circumferential edge of the rotor core 110 and corresponding to the second magnetism isolating grooves 113, and in two magnetic field passages 114 adjacent to each other in the radial direction, the minimum width of the magnetic field passage 114 located on the outer side in the radial direction is smaller than the minimum width of the magnetic field passage 114 located on the inner side in the radial. The cross section of each second magnetism isolating groove 113 is formed into a parallelogram, the sides of the two sides in the circumferential direction of the plurality of second magnetism isolating grooves 113 in the plurality of second magnetism isolating grooves 113 on one side in the circumferential direction of each magnet groove 111 are coplanar respectively, and the sides of the two sides in the circumferential direction of each second magnetism isolating groove 113 are parallel to the magnet groove 111. The angle between the second magnetism isolating grooves 113 and the magnet grooves 111 toward the outer circumferential edge of the rotor core 110 is an acute angle, and the acute angle on the radial outer side is larger than the acute angle on the radial inner side in the two second magnetism isolating grooves 113 on one circumferential side of each magnet groove 111.
Taking the second magnetism isolating groove 113 located at the radial outer side as an example, the magnetic field path 114 between the second magnetism isolating groove 113 and the outer periphery of the rotor core 110 is referred to as an outer magnetic field path 114b, and the magnetic field path 114 between the other second magnetism isolating groove 113 is referred to as an inner magnetic field path 114a, as shown in fig. 2, the saturation degree is represented by the depth of the shaded portion of the magnetic field path 114, and as can be seen from fig. 2, the outer magnetic field path 114b is more saturated than the inner magnetic field path 114a, so that the passage of the magnetizing magnetic force lines from the outer magnetic field path 114b close to the outer periphery of the rotor core 110 is limited, and more magnetic force lines enter the inner magnetic field path 114a or the magnetic field path 114 close to the central hole 115, so that the portion of the permanent magnet 120 close to the central hole 115 is saturated, and the magnetizing property of the permanent magnet motor.
As shown in fig. 5, a permanent magnet electric machine 10 according to an embodiment of the present invention includes the rotor 100 of the foregoing permanent magnet electric machine.
According to the permanent magnet motor 10 of the embodiment of the invention, due to the rotor 100 of the permanent magnet motor, the working noise of the permanent magnet motor 10 is reduced, and the working efficiency of the permanent magnet motor 10 is improved.
As shown in fig. 6, the compressor 1 according to the embodiment of the present invention includes a permanent magnet motor 10.
According to the permanent magnet motor 10 of the embodiment of the invention, due to the permanent magnet motor 10, the working noise of the compressor 1 is reduced, and the working efficiency of the compressor 1 is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A rotor for a permanent magnet electric machine, comprising:
the rotor core is provided with a central hole and a plurality of magnet grooves, the magnet grooves are distributed along the circumferential direction of the central hole, and each magnet groove extends along the radial direction of the central hole;
the permanent magnets are inserted into the magnet grooves in a one-to-one correspondence mode, and at least one first magnetism isolating groove is formed in each magnet groove and is located at two radial ends of each permanent magnet; in addition, the air conditioner is provided with a fan,
the rotor core is equipped with the second magnetism isolating groove in every at least one side of magnet groove circumference, the second magnetism isolating groove divides the unilateral region in place into along radial distribution's a plurality of magnetic field route, the unilateral region be the region that corresponds with the second magnetism isolating groove between the periphery of centre bore and rotor core's the periphery edge, in at least a set of adjacent two in footpath the minimum width of the magnetic field route that lies in radial outside is less than lie in radial inboard the minimum width of magnetic field route.
2. The rotor of a permanent magnet motor according to claim 1, wherein a plurality of the second flux barriers are provided on both circumferential sides of each of the magnet slots, and the plurality of the second flux barriers located on one circumferential side of each of the magnet slots are spaced apart in a radial direction.
3. The rotor of a permanent magnet motor according to claim 2, wherein each of the second flux barriers has a cross section formed in a parallelogram, and among the plurality of second flux barriers on one side in the circumferential direction of each of the magnet slots, the sides of both sides in the circumferential direction of the plurality of second flux barriers are coplanar, respectively.
4. The rotor of a permanent magnet motor according to claim 3, wherein an included angle between the second magnetism isolating groove and the magnet groove toward the outer peripheral edge of the rotor core is an acute angle.
5. The rotor of a permanent magnet motor according to claim 1, wherein a magnetic bridge is arranged between the second magnetism isolating groove and the adjacent magnet groove.
6. The rotor of a permanent magnet electric machine according to claim 1, wherein the second flux barrier slot communicates with the magnet slot adjacent thereto.
7. The rotor of a permanent magnet motor according to claim 1, wherein the first flux barrier groove located radially inward of the permanent magnets has an elongated projection protruding radially outward on an inner wall thereof toward the center of the rotor core.
8. A rotor for a permanent magnet electric machine according to any of claims 1-7, characterised in that the permanent magnets are rare earth permanent magnets or ferrite permanent magnets.
9. A permanent magnet electrical machine, characterized in that it comprises a rotor of a permanent magnet electrical machine according to any of claims 1-8.
10. A compressor, characterized by comprising a permanent magnet motor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810843973.XA CN110768421A (en) | 2018-07-27 | 2018-07-27 | Rotor of permanent magnet motor, permanent magnet motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810843973.XA CN110768421A (en) | 2018-07-27 | 2018-07-27 | Rotor of permanent magnet motor, permanent magnet motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110768421A true CN110768421A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810843973.XA Pending CN110768421A (en) | 2018-07-27 | 2018-07-27 | Rotor of permanent magnet motor, permanent magnet motor and compressor |
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| Country | Link |
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| CN (1) | CN110768421A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994291A (en) * | 2021-02-22 | 2021-06-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, motor rotor and compressor |
| CN113629916A (en) * | 2021-08-05 | 2021-11-09 | 中山大洋电机股份有限公司 | Rotor structure and permanent magnet synchronous motor applying same |
-
2018
- 2018-07-27 CN CN201810843973.XA patent/CN110768421A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994291A (en) * | 2021-02-22 | 2021-06-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, motor rotor and compressor |
| CN113629916A (en) * | 2021-08-05 | 2021-11-09 | 中山大洋电机股份有限公司 | Rotor structure and permanent magnet synchronous motor applying same |
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