CN112448507A - Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure - Google Patents
Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure Download PDFInfo
- Publication number
- CN112448507A CN112448507A CN202011202936.4A CN202011202936A CN112448507A CN 112448507 A CN112448507 A CN 112448507A CN 202011202936 A CN202011202936 A CN 202011202936A CN 112448507 A CN112448507 A CN 112448507A
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- rotor
- groove
- core body
- iron core
- wall
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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)
Abstract
The application provides a rotor core, a rotor structure, a motor, a compressor and an air conditioner with the rotor core, which comprise a core body; the groove body structure comprises a magnetism isolating groove and a connecting part; the magnetism isolating groove is arranged on the outer peripheral wall of the iron core body; the magnetism isolating groove comprises a first inner wall and a second inner wall which are oppositely arranged; the first inner wall and the second inner wall are sequentially arranged in the circumferential direction of the iron core body; the connecting part is arranged at the notch of the magnetism isolating groove; the connecting portion connects the first inner wall and the second inner wall. According to the rotor core, the rotor structure, the motor, the compressor and the air conditioner with the compressor, the torque fluctuation of the permanent magnet synchronous motor is improved, meanwhile, the leakage magnetic flux of the motor can be reduced, and the motor efficiency is improved.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a rotor core, a rotor structure, a motor, a compressor and an air conditioner with the same.
Background
At present, in the existing air condition compressor motor structure, because the rotor is provided with a permanent magnet structure, the permanent magnet and the stator interact with each other to generate a cogging torque and a large torque ripple, so that a large electromagnetic noise is generated.
However, the through groove formed in the rotor may cause a large magnetic leakage, which greatly reduces the efficiency and flux utilization rate of the motor, and may cause problems of an excessively high local magnetic density, an increased torque density, an excessively high local temperature rise, and the like.
Therefore, how to provide a rotor core, a rotor structure, a motor, a compressor and an air conditioner with the same, which can reduce the leakage flux of the motor and improve the efficiency of the motor while improving the large torque fluctuation of the permanent magnet synchronous motor, is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
Therefore, the technical problem that this application will be solved lies in providing a rotor core, rotor structure, motor and compressor and have its air conditioner, when improving that PMSM torque is undulant big, can reduce the leakage magnetic flux of motor, improves motor efficiency.
In order to solve the above problem, the present application provides a rotor core including:
an iron core body;
the groove body structure comprises a magnetism isolating groove and a connecting part; the magnetism isolating groove is arranged on the outer peripheral wall of the iron core body; the magnetism isolating groove comprises a first inner wall and a second inner wall which are oppositely arranged; the first inner wall and the second inner wall are sequentially arranged in the circumferential direction of the iron core body; the connecting part is arranged at the notch of the magnetism isolating groove; the connecting portion connects the first inner wall and the second inner wall.
Preferably, the iron core body is provided with a permanent magnet slot; the permanent magnet slot is used for mounting a permanent magnet; in the circumferential direction of the iron core body, the position of the groove body structure corresponds to the position of the permanent magnet groove.
Preferably, each permanent magnet slot is correspondingly provided with at least one slot body structure.
Preferably, in a cross section of the core body, a shape of the connection portion includes at least one of an arc shape, a rectangular shape, a bent shape, and an irregular shape;
and/or the magnetism isolating groove is a strip-shaped groove; the iron core body is provided with a first end face and a second end face; the strip-shaped groove extends from the first end face to the second end face.
Preferably, the number of the groove body structures is set to be at least one; when the number of the groove body structures is set to be more than two, the groove body structures are sequentially arranged in the circumferential direction of the iron core body.
Preferably, the magnetism isolating groove is correspondingly provided with at least one connecting part.
Preferably, when the magnetism isolating groove is correspondingly provided with more than two connecting parts, the more than two connecting parts are arranged in sequence in the extending direction of the magnetism isolating groove.
Preferably, in the radial direction of the cross section of the iron core body, the thickness of the connecting part is d; in the central axis direction of the iron core body, the width of the connecting part is h; wherein d is more than or equal to 0.3mm and less than or equal to 0.8 mm; and/or h is more than or equal to 0.6mm and less than or equal to 2 mm.
Preferably, on the cross section of the iron core body, a central angle corresponding to the space occupied by the groove body structure is theta; the radius of the iron core body is R; in the central axis direction of the iron core body, the height of the iron core body is H; the number of the connecting parts is set to be N; wherein N is more than or equal to 0.06 and less than or equal to 0.3.
According to still another aspect of the present application, there is provided a rotor structure including a rotor core, the rotor core being the above-mentioned rotor core.
According to yet another aspect of the present application, there is provided an electric machine comprising a rotor structure as described above.
According to still another aspect of the present application, there is provided a compressor including a motor, the motor being the above-mentioned motor.
According to still another aspect of the present application, there is provided an air conditioner including a compressor, the compressor being the above-mentioned compressor.
The application provides a rotor core, rotor structure, motor and compressor and have its air conditioner, magnetism proof slot notch department increases connecting portion, through the effect of connecting portion, can effectively reduce the motor magnetic leakage, improves the magnetic circuit distribution of motor, when improving permanent magnet synchronous motor torque fluctuation big, can reduce the magnetic leakage flux of motor, improves motor efficiency.
Drawings
Fig. 1 is a schematic structural view of a rotor core according to an embodiment of the present application;
fig. 2 is a schematic structural view of a rotor core according to an embodiment of the present application;
FIG. 3 is a left side view of a rotor core of an embodiment of the present application;
FIG. 4 is a left side view of a rotor core of an embodiment of the present application;
FIG. 5 is a top view of a rotor structure according to an embodiment of the present application;
FIG. 6 is a top view of a rotor structure according to an embodiment of the present application;
FIG. 7 is an enlarged view taken at A in FIG. 6;
FIG. 8 is an enlarged view at B in FIG. 6;
FIG. 9 is a top view of a rotor structure according to an embodiment of the present application;
FIG. 10 is a top view of a rotor structure according to an embodiment of the present application;
FIG. 11 is a top view of a rotor structure according to an embodiment of the present application;
fig. 12 is a plan view of a rotor structure according to an embodiment of the present application.
The reference numerals are represented as:
1. an iron core body; 2. a magnetism isolating groove; 3. a connecting portion; 31. a first connection portion; 32. a second connecting portion; 4. a permanent magnet slot; 5. and a permanent magnet.
Detailed Description
With combined reference to fig. 1-2, according to an embodiment of the present application, a rotor core includes a core body 1 and a slot structure, where the slot structure includes a magnetism isolating slot 2 and a connecting portion 3; the magnetism isolating groove 2 is arranged on the outer peripheral wall of the iron core body 1; the magnetism isolating groove 2 comprises a first inner wall and a second inner wall which are oppositely arranged; the first inner wall and the second inner wall are sequentially arranged in the circumferential direction of the iron core body 1; the connecting part 3 is arranged at the notch of the magnetism isolating groove 2; the connecting part 3 is connected with the first inner wall and the second inner wall so as to improve the cogging torque of the motor and reduce the magnetic leakage; increase magnetism-isolating groove 2 on iron core body 1, magnetism-isolating groove 2 notch department increases connecting portion 3, and through connecting portion 3's effect, can effectively reduce the motor magnetic leakage, improve the magnetic circuit distribution of motor, when improving motor tooth's socket torque, reduce motor magnetic density, reduce torque density, improve the magnetic flux utilization ratio of motor, improve the performance of motor. The permanent magnet synchronous motor torque ripple is improved, and meanwhile, the leakage magnetic flux of the motor can be reduced, and the motor efficiency is improved. The material of the connecting portion 3 is the same as that of the core body 1.
Referring to fig. 5 in combination, the present application also discloses some embodiments, a permanent magnet slot 4 is provided on the iron core body 1; the permanent magnet slot 4 is used for installing a permanent magnet 5; in the circumferential direction of the iron core body 1, the position of the groove body structure corresponds to the position of the permanent magnet groove 4, namely, the magnetism isolating groove 2 is arranged on the outer circumference of the iron core body 1 and is radially positioned between the permanent magnet 5 and the outer circle of the rotor, the circumferential position is within the range of an angle alpha, and the angle alpha is an included angle formed by the center of the rotor iron core and two ends of the permanent magnet 5.
The application also discloses some embodiments, each permanent magnet slot 4 is correspondingly provided with at least one slot body structure; the number of the groove body structures corresponding to each permanent magnet groove 4 is at least one, and can be a plurality.
Referring to fig. 6 to 12 in combination, in the cross section of the core body 1, the shape of the connecting portion 3 includes at least one of an arc shape, a rectangular shape, a bent shape, and an irregular shape; the connecting parts 3 corresponding to different magnetism isolating grooves 2 can be the same in shape or different in shape, and at least one connecting part 3 corresponding to each magnetism isolating groove 2 can be arranged, or a plurality of connecting parts can be arranged.
And/or the magnetism isolating groove 2 is a strip-shaped groove; the iron core body 1 is provided with a first end face and a second end face; the strip-shaped groove extends from the first end face to the second end face.
The application also discloses some embodiments, the number of the groove body structures is set to be at least one; when the number of the slot body structures is set to be two or more, the two or more slot body structures are sequentially arranged in the circumferential direction of the iron core body 1.
Referring to fig. 3-4 in combination, the present application also discloses some embodiments, the magnetism isolating groove 2 is correspondingly provided with at least one connecting portion 3; when the magnetic isolation groove structure is provided with a plurality of groove body structures, namely a plurality of magnetic isolation grooves 2, the magnetic isolation grooves 2 and the connecting parts 3 are arranged in a matching way, one magnetic isolation groove 2 can be correspondingly provided with a plurality of connecting parts 3, and the number of the connecting parts 3 corresponding to each magnetic isolation groove 2 can be the same or different; namely, a plurality of magnetism isolating grooves 2 are provided, and the number of the connecting parts 3 arranged at the notches of the magnetism isolating grooves 2 is different.
At least two connecting parts 3 are correspondingly arranged in the same magnetism isolating groove 2; the number and the positions of at least two types of connecting parts 3 corresponding to the same magnetism isolating groove 2 distributed in the axial direction of the rotor core may or may not correspond to each other. The two types of connecting portions 3 are different in shape in the cross section of the core body 1, and are divided into a first connecting portion 31 and a second connecting portion 32. As shown in fig. 4, there are two kinds of connecting portions 3 in the same magnetism isolating groove 2, the first connecting portion 31 is a bending surface on the cross section of the iron core body 1, 5 first connecting portions 31 are distributed in the axial direction, the second connecting portions 32 are circular arc-shaped, and 4 second connecting portions 32 are respectively arranged in the axial direction; the two connecting parts 3 are distributed in a staggered way; referring to fig. 7-8, the two connecting portions 3 in the same magnetism isolating groove 2 are both arc-shaped, but have different radiuses.
On the cross section of the iron core body 1, the first connecting part 31 is a bending surface; the second connecting portion 32 is an arc-shaped surface; the number and the position of the connecting parts 3 corresponding to the same magnetism isolating groove 2 can be the same or different; as shown in fig. 3, the connecting portions 3 in the two middle magnetism isolating grooves 2 are both bent surfaces on the cross section of the iron core body 1; the connecting parts 3 in the two magnetism isolating grooves 2 on the two sides are arc surfaces on the cross section of the iron core body 1. As shown in fig. 4, the connecting portions 3 in the two magnetism isolating grooves 2 on both sides are arc-shaped surfaces on the cross section of the iron core body 1; the connecting part 3 in the middle two magnetism isolating grooves 2 has a part of a bending surface and a part of a rectangular surface on the cross section of the iron core body 1.
The application also discloses some embodiments, when magnetism proof slot 2 corresponds and is provided with connecting portion 3 more than two, connecting portion 3 more than two are arranged in proper order in magnetism proof slot 2's extending direction, and every magnetism proof slot 2 is in iron core body 1 axial, and connecting portion 3 can evenly distributed, also can uneven distribution, and the distance between every two adjacent connecting portion 3 that same magnetism proof slot 2 corresponds promptly can be the same also can not be the same, and concrete position is according to the design of motor magnetic circuit distribution.
The application also discloses some embodiments, in the radial direction of the cross section of the iron core body 1, the thickness of the connecting part 3 is d; the width of the connecting part 3 is h in the central axis direction of the iron core body 1; wherein d is more than or equal to 0.3mm and less than or equal to 0.8 mm; and/or h is more than or equal to 0.6mm and less than or equal to 2 mm. The connecting parts 3 are axially distributed along the rotor core, and each connecting part 3 has a thickness d and a width h.
The application also discloses some embodiments, on the cross section of the iron core body 1, the central angle corresponding to the space occupied by the groove body structure is theta; the radius of the iron core body 1 is R; in the central axis direction of the iron core body 1, the height of the iron core body 1 is H; the number of the connecting parts 3 is N; wherein the content of the first and second substances,
if the gap is formed by the magnetism isolating groove and the outer circumference of the rotor, the included angle formed by the two ends of the gap and the circle center is theta, the radius of the rotor core is R, the height of the rotor is H, the number of the connecting parts arranged in the radial direction of each magnetism isolating groove is N, and N meets the requirement that N is used for ensuring the radial direction of the rotor
In this case, the magnetic flux leakage resistance of the connecting portion can be ensured to be optimal.
According to the embodiment of the application, the rotor structure comprises the rotor core, and the rotor core is the rotor core.
According to an embodiment of the present application, there is provided a motor including a rotor structure, where the rotor structure is the above-mentioned rotor structure. The motor is a permanent magnet synchronous motor.
According to an embodiment of the application, a compressor is provided, which comprises a motor, wherein the motor is the motor.
According to an embodiment of the application, an air conditioner is provided, which comprises a compressor, wherein the compressor is the compressor.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (13)
1. A rotor core, comprising:
an iron core body (1);
the groove body structure comprises a magnetism isolating groove (2) and a connecting part (3); the magnetism isolating groove (2) is arranged on the outer peripheral wall of the iron core body (1); the magnetism isolating groove (2) comprises a first inner wall and a second inner wall which are oppositely arranged; the first inner wall and the second inner wall are sequentially arranged in the circumferential direction of the iron core body (1); the connecting part (3) is arranged at the notch of the magnetism isolating groove (2); the connecting portion (3) connects the first inner wall and the second inner wall.
2. The rotor core according to claim 1, wherein the core body (1) is provided with permanent magnet slots (4); the permanent magnet groove (4) is used for installing a permanent magnet (5); in the circumferential direction of the iron core body (1), the positions of the groove body structures correspond to the positions of the permanent magnet grooves (4).
3. The rotor core according to claim 2, characterized in that each permanent magnet slot (4) is correspondingly provided with at least one slot structure.
4. The rotor core according to claim 1, wherein the shape of the connecting portion (3) includes at least one of an arc shape, a rectangular shape, a bent shape, and an irregular shape in a cross section of the core body (1);
and/or the magnetism isolating groove (2) is a strip-shaped groove; the iron core body (1) is provided with a first end face and a second end face; the strip-shaped groove extends from the first end face to the second end face.
5. The rotor core according to claim 1, wherein the number of the slot structures is set to at least one; when the number of the groove body structures is more than two, the groove body structures are sequentially arranged in the circumferential direction of the iron core body (1).
6. The rotor core according to claim 1, wherein the flux barrier slots (2) are correspondingly provided with at least one of the connecting portions (3).
7. The rotor core according to claim 6, wherein when two or more connecting portions (3) are provided in correspondence with the magnetic shield groove (2), the two or more connecting portions (3) are arranged in order in an extending direction of the magnetic shield groove (2).
8. The rotor core according to claim 1, characterized in that the thickness of the connecting portion (3) in the radial direction of the cross-section of the core body (1) is d; the width of the connecting part (3) is h in the direction of the central axis of the iron core body (1); wherein d is more than or equal to 0.3mm and less than or equal to 0.8 mm; and/or h is more than or equal to 0.6mm and less than or equal to 2 mm.
9. The rotor core according to claim 1, wherein on the cross section of the core body (1), the central angle corresponding to the space occupied by the slot structure is θ; the radius of the iron core body (1) is R; in the central axis direction of the iron core body (1), the height of the iron core body (1) is H; the number of the connecting parts (3) is N; wherein the content of the first and second substances,
10. a rotor structure comprising a rotor core, characterized in that the rotor core is a rotor core according to any one of claims 1-9.
11. An electrical machine comprising a rotor structure, characterized in that the rotor structure is a rotor structure according to claim 10.
12. A compressor comprising an electric motor, wherein the electric motor is the electric motor of claim 11.
13. An air conditioner comprising a compressor, wherein said compressor is the compressor of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202936.4A CN112448507A (en) | 2020-11-02 | 2020-11-02 | Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202936.4A CN112448507A (en) | 2020-11-02 | 2020-11-02 | Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112448507A true CN112448507A (en) | 2021-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011202936.4A Pending CN112448507A (en) | 2020-11-02 | 2020-11-02 | Rotor core, rotor structure, motor, compressor and air conditioner with rotor core and rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112448507A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079092A (en) * | 2014-06-24 | 2014-10-01 | 广东威灵电机制造有限公司 | Rotor core and motor with same |
| US20150357871A1 (en) * | 2014-06-05 | 2015-12-10 | Samsung Electronics Co., Ltd. | Motor assembly and method for providing the same |
| CN108512329A (en) * | 2018-04-27 | 2018-09-07 | 创驱（上海）新能源科技有限公司 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor |
| CN208241435U (en) * | 2018-06-20 | 2018-12-14 | 广东美芝制冷设备有限公司 | rotor, motor and compressor |
| CN111108664A (en) * | 2017-09-29 | 2020-05-05 | 日立汽车系统株式会社 | Rotor core, rotor, rotating electrical machine, and electric auxiliary machine system for automobile |
-
2020
- 2020-11-02 CN CN202011202936.4A patent/CN112448507A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150357871A1 (en) * | 2014-06-05 | 2015-12-10 | Samsung Electronics Co., Ltd. | Motor assembly and method for providing the same |
| CN104079092A (en) * | 2014-06-24 | 2014-10-01 | 广东威灵电机制造有限公司 | Rotor core and motor with same |
| CN111108664A (en) * | 2017-09-29 | 2020-05-05 | 日立汽车系统株式会社 | Rotor core, rotor, rotating electrical machine, and electric auxiliary machine system for automobile |
| CN108512329A (en) * | 2018-04-27 | 2018-09-07 | 创驱（上海）新能源科技有限公司 | A kind of magnetic steel built-in type rotor and the permanent magnet synchronous motor for including the magnetic steel built-in type rotor |
| CN208241435U (en) * | 2018-06-20 | 2018-12-14 | 广东美芝制冷设备有限公司 | rotor, motor and compressor |
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Application publication date: 20210305 |