CN107332376B - Rotor, motor with rotor and compressor - Google Patents
Rotor, motor with rotor and compressor Download PDFInfo
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- CN107332376B CN107332376B CN201710642413.3A CN201710642413A CN107332376B CN 107332376 B CN107332376 B CN 107332376B CN 201710642413 A CN201710642413 A CN 201710642413A CN 107332376 B CN107332376 B CN 107332376B
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- rotor punching
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- 238000004080 punching Methods 0.000 claims abstract description 72
- 230000004907 flux Effects 0.000 description 9
- 238000010030 laminating Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor, comprising: the rotor punching sheet comprises a plurality of rotor punching sheets, each rotor punching sheet is provided with a shaft hole and a plurality of accommodating grooves, the outer edge of the cross section of each rotor punching sheet comprises a plurality of arc sections, each arc section comprises a first arc part with the circle center spaced from the central axis of the shaft hole and a second arc part with the circle center positioned on the central axis of the shaft hole, the rotor punching sheets form a plurality of rotor punching sheet groups, each rotor punching sheet group comprises at least one rotor punching sheet, and the first arc part of each rotor punching sheet in one of the two adjacent rotor punching sheet groups is opposite to the first arc part or the second arc part of each rotor punching sheet in the other of the two adjacent rotor punching sheet groups in the axial direction of the rotor; and the magnets are arranged in the accommodating grooves in a one-to-one correspondence manner. The rotor provided by the embodiment of the invention has the advantages of convenience in positioning, accuracy in positioning, high concentricity with the stator, high air gap accuracy, low harmonic content, small vibration, low noise and the like.
Description
Technical Field
The invention relates to the field of motors, in particular to a rotor, and also relates to a motor and a compressor with the rotor.
Background
The rotor of the existing rotary compressor adopts a cantilever structure, namely, only a single-side bearing is adopted, so that an air gap of the rotor needs to be adjusted through tools such as a feeler gauge and the like in the installation process of the rotor, and the process requires that the inner circular surface of a stator and the outer circular surface of the rotor are concentric circular arcs in a large range and can be well positioned. If the inner circular surface of the stator and the outer circular surface of the rotor are point-to-point, the accuracy of the air gap is poor.
However, if the inner circular surface of the stator and the outer circular surface of the rotor are concentric circular arcs to concentric circular arcs in a wide range (i.e., the outer circular arc of the rotor core has a concentric circular arc with a large span angle), the rotor optimization difficulty is increased, and it is difficult to reduce the air gap magnetic field harmonics.
Therefore, it is difficult to achieve both the improvement of the air gap accuracy and the reduction of the air gap field harmonics in the conventional rotor.
Disclosure of Invention
The present invention has been made to overcome the problems occurring in the prior art, and an object of the present invention is to provide a rotor having advantages of high air gap accuracy and low air gap magnetic field harmonics, and a motor and a compressor having the same.
In order to achieve the above object, a first aspect of the present invention provides a rotor comprising: the rotor punching sheet comprises a plurality of rotor punching sheets, each rotor punching sheet is provided with a shaft hole and a plurality of accommodating grooves, the outer edge of the cross section of each rotor punching sheet comprises a plurality of arc sections, each arc section comprises a first arc part and a second arc part which are connected, the circle center of each first arc part is spaced from the central axis of the shaft hole, the circle center of each second arc part is located on the central axis of the shaft hole, the plurality of rotor punching sheets form a plurality of rotor punching sheet groups, each rotor punching sheet group comprises at least one rotor punching sheet, and the first arc part of each rotor punching sheet in one of the two adjacent rotor punching sheet groups is opposite to the first arc part or the second arc part of each rotor punching sheet in the other of the two adjacent rotor punching sheet groups in the axial direction of the rotor; and the magnets are arranged in the accommodating grooves in a one-to-one correspondence manner.
According to the rotor provided by the embodiment of the invention, the plurality of second arc parts concentric with the shaft hole of the rotor are arranged on the outer edge of the cross section of the rotor punching sheet, so that part of the outer peripheral surface of the rotor and the inner circular surface of the stator are concentric arcs in a large range to concentric arcs, namely the rotor is provided with a concentric arc with a larger span angle, and therefore, the air gap of the rotor can be conveniently and accurately adjusted and concentrically positioned by utilizing tools such as a feeler gauge and the like, so that the concentricity between the rotor and the stator can be well controlled.
According to the rotor provided by the embodiment of the invention, the plurality of first arc parts which are not concentric with the shaft hole of the rotor are arranged on the outer edge of the cross section of the rotor punching sheet, so that the radial air gap magnetic density of the first arc parts is far smaller than that of the second arc parts, the harmonic content of an air gap magnetic field can be greatly reduced, and the vibration noise of a motor comprising the rotor can be further reduced.
Therefore, the rotor provided by the embodiment of the invention has the advantages of convenience in positioning, accuracy in positioning, high concentricity with the stator, high air gap accuracy, low harmonic content, small vibration, low noise and the like.
Preferably, the plurality of circular arc segments are opposite to the plurality of accommodating grooves one by one.
Preferably, the central angle θ of each circular arc segment is 360 °/P, where P is the number of magnetic poles of the rotor.
Preferably, two adjacent circular arc sections are radially symmetrical relative to one shaft hole.
Preferably, the length of the first arc portion is equal to the length of the second arc portion.
Preferably, the radiuses of the circumferences where the plurality of first arc parts are located are equal to each other, the lengths of the plurality of first arc parts are equal to each other, the centers of circles of the circumferences where the plurality of first arc parts are located on the first circumference, and the centers of circles of the first circumference are located on the central axis of the shaft hole.
Preferably, each second circular arc portion is located each outside of first circular arc portion, and each holding groove includes: the groove body is used for accommodating the magnet, and the length direction of the groove body is perpendicular to one radial direction of the rotor; and the inner end of the supporting groove is connected with one end of the groove body in the length direction, and the outer end of the supporting groove is adjacent to the corresponding second arc part.
Preferably, two adjacent receiving grooves are symmetrical with respect to a radial direction of the rotor.
A second aspect of the present invention provides an electric machine comprising: a stator; and a rotor according to the first aspect of the present invention, the rotor being rotatably provided with respect to the stator.
The motor provided by the embodiment of the invention has the advantages of convenience in assembly, low harmonic content, small vibration and low noise by arranging the rotor.
A third aspect of the present invention provides a compressor comprising: a housing; and a motor according to the second aspect of the present invention, the motor being provided in the housing.
The compressor provided by the embodiment of the invention has the advantages of convenience in assembly, low harmonic content, small vibration and low noise by arranging the motor.
Drawings
Fig. 1 is a schematic structural view of a rotor sheet of a rotor according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a rotor according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a rotor according to another embodiment of the present invention;
FIG. 4 is a bar graph of radial air gap flux densities of a first arc and a second arc of a rotor according to an embodiment of the present invention;
FIG. 5 is a bar graph of the fundamental air gap flux density of the first and second receiving slots of the rotor according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a motor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A rotor 10 according to an embodiment of the present invention is described below with reference to the drawings. As shown in fig. 1 to 3, a rotor 10 according to an embodiment of the present invention includes a plurality of rotor sheets 110 and a plurality of magnets (not shown in the drawings).
Each rotor punching sheet 110 is provided with shaft hole 111 and a plurality of holding grooves 112, and the outer edge of the cross section of each rotor punching sheet 110 includes a plurality of circular arc sections 113, and each circular arc section 113 includes first circular arc portion 114 and second circular arc portion 115 that link to each other.
The center of each first circular arc portion 114 is spaced apart from the central axis of the shaft hole 111, i.e., each first circular arc portion 114 is not concentric with the shaft hole 111. The center of each second circular arc portion 115 is located on the central axis of the shaft hole 111, i.e., each second circular arc portion 115 is concentric with the shaft hole 111.
The central axis of the shaft hole 111 coincides with the central axis of the rotor 10, that is, the axial direction of the rotor sheet 110 is the same as the axial direction of the rotor 10, and the shaft holes 111 may form the shaft hole of the rotor 10. Therefore, the center of each first circular arc portion 114 is spaced apart from the central axis of the rotor 10, and the center of each second circular arc portion 115 is located on the central axis of the rotor 10, that is, each first circular arc portion 114 is not concentric with the shaft hole of the rotor 10, and each second circular arc portion 115 is concentric with the shaft hole of the rotor 10.
The plurality of rotor punching sheets 110 form a plurality of rotor punching sheet groups 120, and each rotor punching sheet group 120 includes at least one rotor punching sheet 110. The first circular arc portion 114 of each rotor punching sheet 110 of one of the two adjacent rotor punching sheet groups 120 is opposite to the first circular arc portion 114 or the second circular arc portion 115 of each rotor punching sheet 110 of the other one of the two adjacent rotor punching sheet groups 120 in the axial direction of the rotor 10.
The magnets are disposed in the receiving grooves 112 in a one-to-one correspondence. In other words, the number of the magnets and the number of the accommodation grooves 112 are equal to each other, and one of the magnets is disposed in one of the accommodation grooves 112.
According to the rotor 10 of the embodiment of the present invention, the plurality of second arc portions 115 concentric with the shaft hole of the rotor 10 are disposed on the outer edge of the cross section of the rotor sheet 110, so that a part of the outer circumferential surface of the rotor 10 and the inner circumferential surface of the stator are concentric arcs in a wide range to concentric arcs, that is, the rotor 10 has a concentric arc with a large span angle, and thus, the air gap of the rotor 10 can be conveniently and accurately adjusted and concentrically positioned by using a tool such as a feeler gauge, so that the concentricity between the rotor 10 and the stator can be well controlled.
According to the rotor 10 of the embodiment of the present invention, the plurality of first arc portions 114 that are not concentric with the shaft hole of the rotor 10 are disposed on the outer edge of the cross section of the rotor sheet 110, so that the radial air gap flux density of the first arc portions 114 is much smaller than that of the second arc portions 115 (as shown in fig. 4), thereby greatly reducing the harmonic content of the air gap magnetic field, and further reducing the vibration noise of the motor 1 including the rotor 10.
Therefore, the rotor 10 according to the embodiment of the present invention has the advantages of easy positioning, precise positioning, high concentricity with the stator, high air gap precision, low harmonic content, small vibration, low noise, etc.
As shown in fig. 1-3, in some embodiments of the present invention, the rotor 10 may include a plurality of rotor sheets 110 and a plurality of the magnets. Preferably, the magnet may be a permanent magnet. The magnet may be mounted in the receiving groove 112 in a known manner. This is irrelevant to the inventive point of the present application and is therefore not described in detail.
The plurality of rotor punching sheets 110 may be laminated together in a known manner. Preferably, edges of the plurality of shaft holes 111 may be aligned with each other. The plurality of shaft holes 111 may constitute a shaft hole of the rotor 10.
Since the outer edge of the cross section of each rotor sheet 110 includes a plurality of first arc portions 114 and a plurality of second arc portions 115, the outer circumferential surface of each rotor sheet 110 includes a plurality of first arc surfaces formed by the first arc portions 114 and a plurality of second arc surfaces formed by the second arc portions 115.
As shown in fig. 1 to 3, the plurality of arc segments 113 may be opposite to the plurality of receiving grooves 112 one by one, that is, the receiving grooves 112 are opposite to the first arc portion 114 and the second arc portion 115 of the corresponding arc segments 113. That is, the number of the circular arc segments 113 may be equal to the number of the receiving grooves 112, and one circular arc segment 113 may be opposite to one receiving groove 112. The structure of the rotor 10 can thereby be made more rational. Specifically, in the circumferential direction of the rotor sheet 110, the end of the circular arc segment 113 slightly protrudes (exceeds) the end of the accommodation groove 112.
Preferably, the central angle θ of each circular arc segment 113 is 360 °/P, where P is the number of magnetic poles of the rotor 10. A connecting line between one end point of the arc segment 113 and the center of the shaft hole 111 is a first connecting line, a connecting line between the other end point of the arc segment 113 and the center of the shaft hole 111 is a second connecting line, and an included angle between the first connecting line and the second connecting line is a central angle θ corresponding to the arc segment 113. Wherein, the two end points of the arc segment 113 and the center of the shaft hole 111 are located on the same horizontal plane. The structure of the rotor 10 can thereby be made more rational.
As shown in fig. 3, in an embodiment of the present invention, the first circular arc portion 114 of each rotor punching sheet 110 of one of the two adjacent rotor punching sheet groups 120 is opposite to the second circular arc portion 115 of each rotor punching sheet 110 of the other of the two adjacent rotor punching sheet groups 120 in the axial direction of the rotor 10.
When the plurality of rotor punching sheets 110 are laminated, each rotor punching sheet 110 of one of the two adjacent rotor punching sheet groups 130 can rotate by a magnetic pole angle relative to each rotor punching sheet 110 of the other one of the two adjacent rotor punching sheet groups 130, so that the symmetry of the rotor 10 can be greatly improved. Thereby, the first circular arc portion 114 of each rotor punching sheet 110 of the one of the two adjacent rotor punching sheet groups 130 and the second circular arc portion 115 of each rotor punching sheet 110 of the other one of the two adjacent rotor punching sheet groups 130 can be opposite to each other in the axial direction of the rotor 10.
As shown in fig. 3, each rotor punching group 120 may include one rotor punching 110. That is, the plurality of rotor sheets 110 that do not rotate by one magnetic pole angle and the plurality of rotor sheets 110 that rotate by one magnetic pole angle may be alternately disposed.
Preferably, each rotor punching sheet group 130 may include more than two rotor punching sheets 110. Therefore, the number of times of rotating the rotor punching sheet 110 by one magnetic pole angle can be greatly reduced, so that the laminating difficulty can be reduced, and the laminating efficiency can be improved.
As shown in fig. 2, in another embodiment of the present invention, the first circular arc portion 114 of each rotor punching sheet 110 of the one of the two adjacent rotor punching sheet groups 120 is opposite to the first circular arc portion 114 of each rotor punching sheet 110 of the other one of the two adjacent rotor punching sheet groups 120 in the axial direction of the rotor 10. That is to say, after a plurality of rotor sheets 110 are laminated together, the outer edges of the plurality of rotor sheets 110 coincide with each other. Therefore, the operation of rotating the rotor punching sheet 110 is not needed, and the laminating difficulty and the laminating efficiency can be reduced and improved under the condition that the harmonic content of the air gap magnetic field is not increased.
The outer edge of the cross section of each rotor sheet 110 includes a plurality of circular arc segments 113, and the plurality of circular arc segments 113 may be sequentially connected so that the outer edge of the cross section of each rotor sheet 110 is closed. That is, no opening is provided on the outer edge of the rotor punching sheet 110.
In a specific example of the present invention, two adjacent circular arc segments 113 may be symmetrical with respect to a radial direction of the shaft hole 111. In other words, the first arc portion 114 of one of the two adjacent arc segments 113 is connected to the first arc portion 114 of the other of the two adjacent arc segments 113, or the second arc portion 115 of one of the two adjacent arc segments 113 is connected to the second arc portion 115 of the other of the two adjacent arc segments 113.
The structure of the rotor 10 can thereby be made more rational. The radial direction of the shaft hole 111, the radial direction of the rotor sheet 110, and the radial direction of the rotor 10 may be the same as each other, and the circumferential direction of the shaft hole 111, the circumferential direction of the rotor sheet 110, and the circumferential direction of the rotor 10 may be the same as each other.
Preferably, the length of the first circular arc portion 114 may be equal to the length of the second circular arc portion 115. The structure of the rotor 10 can thereby be made more rational.
More preferably, the radii of the circumferences where the plurality of first circular arc portions 114 are located may be equal to each other, the lengths of the plurality of first circular arc portions 114 may be equal to each other, and the center of the circumference where the plurality of first circular arc portions 114 are located may be located on the first circumference, and the center of the first circumference may be located on the central axis of the shaft hole 111, that is, the first circumference is concentric with the shaft hole 111. The harmonic content of the air-gap magnetic field can thereby be further reduced, and the vibration noise of the electrical machine 1 comprising the rotor 10 can thereby be further reduced.
As shown in fig. 1-3, in some examples of the invention, each second circular arc portion 115 may be located outside each first circular arc portion 114, i.e., each first circular arc portion 114 may be located inside each second circular arc portion 115 (as shown in fig. 2 and 3). Each receiving groove 112 may include a leg groove 1122 and a groove body 1121 for receiving the magnet.
The length direction of the groove body 1121 may be perpendicular to one radial direction of the shaft hole 111, that is, the groove body 1121 of the receiving groove 112 may extend in a direction perpendicular to one radial direction of the shaft hole 111. In other words, the slot 1121 may be in-line.
An inner end of the leg groove 1122 (an end of the leg groove 1122 adjacent to the shaft hole 111) may be connected to one end of the groove body 1121 in the longitudinal direction, and an outer end of the leg groove 1122 (an end of the leg groove 1122 away from the shaft hole 111) may be adjacent to the corresponding second circular arc portion 115 (the second circular arc portion 115 opposite to the groove body 1121). That is, each receiving groove 112 may be generally L-shaped.
Since each second circular arc portion 115 can be located outside each first circular arc portion 114, by providing the branch groove 1122 adjacent to the corresponding second circular arc portion 115 (i.e., adjacent to the corresponding second circular arc surface constituted by the corresponding second circular arc portion 115), not only can the leakage flux of the plurality of accommodating grooves 112 be reduced, but also the fundamental wave air gap flux density of the plurality of accommodating grooves 112 can be increased, so that the efficiency of the motor 1 including the rotor 10 is made higher.
Preferably, the leakage flux of the accommodating groove 112 is smaller than that of the slot 1121, and the fundamental wave air gap flux density of the accommodating groove 112 is larger than that of the slot 1121 (as shown in fig. 5). The groove 1121 may be equivalent to a straight-line-shaped receiving groove, and the existing receiving grooves for disposing the magnet are all straight-line-shaped receiving grooves. That is, the leakage flux of the receiving groove 112 is smaller than that of the existing receiving groove, and the fundamental wave air gap flux density of the receiving groove 112 is larger than that of the existing receiving groove (as shown in fig. 5).
More preferably, the first arc portion 114 and the second arc portion 115 of each arc segment 113 are tangent. The structure of the rotor 10 can thereby be made more rational.
Preferably, two adjacent receiving grooves 112 are radially symmetrical with respect to one of the shaft holes 111. This further increases the symmetry of the rotor 10, which makes the construction of the rotor 10 more rational.
The invention also provides an electric machine 1. As shown in fig. 6, the motor 1 according to the embodiment of the present invention includes a stator 20 and a rotor 10 according to the above-described embodiment of the present invention, the rotor 10 being rotatably disposed with respect to the stator 20.
The motor 1 according to the embodiment of the present invention has the advantages of convenience in assembly, low harmonic content, small vibration, low noise, etc. by providing the rotor 10.
The rotor 10 may be rotatably arranged with respect to the stator 20 in a known manner and will not be described in detail since it is not relevant to the inventive idea of the present application.
The invention also provides a compressor. The compressor according to the embodiment of the present invention includes a housing and the motor 1 according to the above-described embodiment of the present invention, and the motor 1 is provided in the housing.
The compressor provided by the embodiment of the invention has the advantages of convenience in assembly, low harmonic content, small vibration, low noise and the like by arranging the motor 1.
The compressor according to an embodiment of the present invention may be a rotary compressor. The compressor according to an embodiment of the present invention may further include a cylinder, a main bearing, a sub bearing, and a crankshaft. The cylinder, the main bearing, the secondary bearing and the crankshaft may be known and may be mounted in a known manner, as well as the motor 1 may be mounted in the housing in a known manner, which is not described in detail since it is not relevant to the inventive idea of the present application.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A rotor, comprising:
the rotor punching sheet comprises a plurality of rotor punching sheets, each rotor punching sheet is provided with a shaft hole and a plurality of accommodating grooves, the outer edge of the cross section of each rotor punching sheet comprises a plurality of arc sections, every two adjacent arc sections are opposite to each other and are radially symmetrical to each other, each arc section comprises a first arc part and a second arc part which are connected, the circle center of the first arc part is spaced from the central axis of the shaft hole, the circle center of the second arc part is located on the central axis of the shaft hole, the second arc part of one of the two adjacent arc sections is connected with the second arc part of the other of the two adjacent arc sections, the rotor punching sheets form a plurality of rotor punching sheet groups, each rotor punching sheet group comprises at least one rotor punching sheet, and every two adjacent rotor punching sheets comprises each first arc part of one of the rotor punching sheets and each two adjacent rotor punching sheet groups The portions are opposed in the axial direction of the rotor; and
the magnets are arranged in the accommodating grooves in a one-to-one correspondence manner;
the plurality of arc sections are opposite to the plurality of accommodating grooves one by one; and the central angle theta corresponding to each circular arc section is 360 DEG/P, and P is the number of the magnetic poles of the rotor.
2. The rotor of claim 1 wherein the length of the first arc portion is equal to the length of the second arc portion.
3. The rotor according to claim 2, wherein the radii of the circumferences in which the plurality of first circular arc portions are located are equal to each other, the lengths of the plurality of first circular arc portions are equal to each other, the centers of the circumferences in which the plurality of first circular arc portions are located on the first circumference, and the centers of the first circumferences are located on the central axis of the shaft hole.
4. The rotor of claim 1, wherein each of the second circular arc portions is located outside each of the first circular arc portions, and each of the receiving grooves includes:
the groove body is used for accommodating the magnet, and the length direction of the groove body is perpendicular to one radial direction of the rotor; and
the inner end of the supporting groove is connected with one end of the groove body in the length direction, and the outer end of the supporting groove is adjacent to the corresponding second arc portion.
5. The rotor as set forth in claim 4 wherein adjacent two of said receiving slots are symmetrical with respect to a radial of said rotor.
6. An electric machine, comprising:
a stator; and
a rotor according to any one of claims 1 to 5, the rotor being rotatably arranged relative to the stator.
7. A compressor, comprising:
a housing; and
a motor according to claim 6, the motor being provided within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642413.3A CN107332376B (en) | 2017-07-31 | 2017-07-31 | Rotor, motor with rotor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642413.3A CN107332376B (en) | 2017-07-31 | 2017-07-31 | Rotor, motor with rotor and compressor |
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| Publication Number | Publication Date |
|---|---|
| CN107332376A CN107332376A (en) | 2017-11-07 |
| CN107332376B true CN107332376B (en) | 2020-03-31 |
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| CN201710642413.3A Active CN107332376B (en) | 2017-07-31 | 2017-07-31 | Rotor, motor with rotor and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210404866U (en) * | 2019-08-13 | 2020-04-24 | 宁波安信数控技术有限公司 | Built-in permanent magnet motor rotor punching sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201515268U (en) * | 2009-09-28 | 2010-06-23 | 中山大洋电机股份有限公司 | Rotor of permanent magnet synchronous motor |
| JP2014239633A (en) * | 2013-06-10 | 2014-12-18 | 株式会社ミツバ | Rotor core for motor and brushless motor |
| WO2015142646A1 (en) * | 2014-03-17 | 2015-09-24 | Fca Us Llc | High efficiency internal permanent magnet synchronous electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6806352B2 (en) * | 2015-10-13 | 2021-01-06 | 株式会社安川電機 | Manufacturing method of rotary electric machine and rotor core |
| CN205489861U (en) * | 2016-02-17 | 2016-08-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor of permanent magnet motor and permanent magnet motor |
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2017
- 2017-07-31 CN CN201710642413.3A patent/CN107332376B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201515268U (en) * | 2009-09-28 | 2010-06-23 | 中山大洋电机股份有限公司 | Rotor of permanent magnet synchronous motor |
| JP2014239633A (en) * | 2013-06-10 | 2014-12-18 | 株式会社ミツバ | Rotor core for motor and brushless motor |
| WO2015142646A1 (en) * | 2014-03-17 | 2015-09-24 | Fca Us Llc | High efficiency internal permanent magnet synchronous electric machine |
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| CN107332376A (en) | 2017-11-07 |
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