CN216290391U - Rotor and motor - Google Patents
Rotor and motor Download PDFInfo
- Publication number
- CN216290391U CN216290391U CN202122324847.3U CN202122324847U CN216290391U CN 216290391 U CN216290391 U CN 216290391U CN 202122324847 U CN202122324847 U CN 202122324847U CN 216290391 U CN216290391 U CN 216290391U
- Authority
- CN
- China
- Prior art keywords
- rotor
- rotor core
- arc
- center point
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A rotor and motor, including a rotor core, there is a shaft hole for installing the spindle of the motor in the centre of the rotor core, the rotor core regards shaft hole as the centre to divide into several magnetic force blocks averagely, and the outline of every magnetic force block has a arc line section, two connecting segments and a sunken section connected sequentially along the circumference; the arc line section and the connecting section are formed by different circle centers and different arc radiuses, so that the outer contour of the rotor integrally presents an incomplete circle structure, the air gap flux density distribution can be optimized by utilizing the incomplete circle structure, the air gap flux approaches to a sine wave, the cogging torque and the torque ripple are improved, the concave section can limit a flux flow path, the flux flows to an ideal magnetic circuit, the flux leakage is reduced, and the airtight flux density distribution is optimized; therefore, the torque ripple and the cogging torque are greatly reduced, the noise is improved, and the stability of the output torque of the motor is improved.
Description
Technical Field
The utility model relates to the technical field of compressors, in particular to a rotor and a motor.
Background
Accordingly, the conventional rotary compressor mainly includes the following components: the air compressor comprises an exhaust pipe, a machine shell, a motor (a stator and a rotor), a transmission shaft, an upper bearing, a silencing cover, a compression unit (a cylinder body and a piston), a lower bearing, a bottom cover, an outlet pipe, a liquid storage device and an inlet pipe. The basic working principle of the compressor is as follows: when the compressor is powered on, the stator generates a magnetic field to rotate the rotor and drive the transmission shaft to make the piston perform eccentric motion in the cylinder body, so that the low-temperature and low-pressure gas cold medium is compressed into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas is discharged into the shell through the cylinder body and the silencing cover. Then the refrigerant is discharged into a refrigeration circulating system through an outlet pipe after passing through the edge cutting at the outer side of the stator and the clearance between the rotors.
As is well known, a permanent magnet synchronous motor is widely used in the field of household appliances such as air conditioning compressors due to its high efficiency. The common method for improving the energy efficiency of the motor is to improve the air gap magnetic field of the motor part, however, when the method is adopted, the harmonic wave of the air gap magnetic field is increased, so that the noise vibration of the motor and the compressor is worse.
In view of the above, the present inventor has made an intensive study on the above prior art and applied the study in cooperation with the theory to try to solve the above problems, which is an improved objective of the present inventor.
Disclosure of Invention
Therefore, an object of the present invention is to provide a method for greatly reducing torque ripple and cogging torque, improving air gap flux waveform and reducing magnetic leakage, which is helpful to reduce vibration noise and improve the stability of the output torque of the motor, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above object, the present invention provides a rotor, including a rotor core, the rotor core being a cylindrical body with a predetermined length, a shaft hole for installing a motor spindle being formed at a center of the rotor core, the shaft hole penetrating both ends of the rotor core, characterized in that:
the rotor core is averagely divided into a plurality of magnetic blocks by taking the shaft hole as the center, and the outer contour of each magnetic block is sequentially provided with an arc line section, two connecting sections and a sunken section which are connected along the circumferential direction; the arc line segment is adjacent to the space between the two connecting segments, and the sunken segment is adjacent to the connecting segment; the arc radius of the arc segment is R1, the arc radius of the connecting segment is R2, and the distance value between the concave segment and the center point of the rotor core is d 3; the arc line section and the connecting section are formed by different circle centers and different arc radiuses, so that the outer contour of the rotor integrally presents an incomplete circle structure.
Preferably, a first imaginary line is defined, the first imaginary line extends from the central point of the rotor core through the central point of the arc segment, and the central point of the arc segment is located on the first imaginary line; the distance between the center point of the arc segment and the center point of the rotor core is d1, the distance between the center point of the rotor core and the top end of the arc segment is d2, and d1< d2 is satisfied.
Preferably, the distance between the center point of the arc segment and the center point of the rotor core is d 1; the circular arc radius of the connecting segment is R2, and d1< R2 is satisfied.
Preferably, the circular arc radius of the connecting section is R2, the distance between the center point of the rotor core and the top end of the arc segment is d2, the distance between the center point of the concave section and the center point of the rotor core is d3, and d2 ≧ R2 > d3 is satisfied.
Preferably, the rotor further includes a plurality of magnets respectively disposed at the magnetic force blocks of the rotor core.
Preferably, each magnetic block is provided with a magnet slot, the magnet slot penetrates through the bottom surface of the magnetic block along the top surface of the magnetic block, and the magnet is mounted in the magnet slot.
Preferably, a second imaginary line is defined, the second imaginary line extends from the center point of the rotor core through the center point of the recessed section; the bottom end of the concave section is designed to be a straight line, the length of the straight line at the bottom end of the concave section is a1, the distance value of a connecting line of the middle points of the broadsides between the two magnets is a2, and the following relational expression is satisfied:
preferably, the shape of the recessed section is any shape.
Preferably, the shape of the magnet slot of each magnetic block is either an elongated shape or a V-shape.
According to another aspect of the present invention, there is also provided a motor, characterized by comprising:
a stator; and
the rotor is arranged in the stator and can rotate relative to the stator.
According to the structure, the utility model has the beneficial effects that:
1. a rotor is provided that includes a rotor core and magnets. The rotor core is divided into a plurality of magnetic force blocks by taking the shaft hole as the center, each magnetic force block is provided with a magnet slot and is provided with a magnet to form a magnetic pole, and the outer contour of each magnetic force block is sequentially provided with an arc line section, two connecting sections and a sunken section which are connected along the circumferential direction; the arc line segment is adjacent to the two connecting segments, the sunken segment is adjacent to the one connecting segment, and extends through the central point of the arc line segment through the central point of the rotor core to define a first imaginary line, the central point of the arc line segment is positioned on the first imaginary line but is not concentric with the central point of the rotor core, and the arc line segment and the connecting segments are formed by different circle centers and different arc radiuses, so that the outer contour of the rotor integrally presents an incomplete circle structure.
2. A rotor is provided that includes a rotor core and magnets. The rotor core is divided into a plurality of magnetic force blocks by taking the shaft hole as the center, each magnetic force block is provided with a magnet slot and is provided with a magnet to form a magnetic pole, and the outer contour of each magnetic force block is sequentially provided with an arc line section, two connecting sections and a sunken section which are connected along the circumferential direction; the arc segment is adjacent to the two connecting segments, the concave segment is adjacent to the one connecting segment, and extends through the central point of the concave segment through the central point of the rotor core to define a second imaginary line, wherein the bottom end of the concave segment is designed as a straight line, the length of the straight line at the bottom end of the concave segment is a1, the connecting line distance value of the midpoints of the wide edges between the two magnets is a2, and the following relations are satisfied:
reduce the dishingThe segment is closed, so that the concave segment positioned on the second imaginary line can limit the flux flow path, the flux flows to an ideal magnetic path, the flux leakage is reduced, and the airtight flux density distribution is optimized.
Drawings
Fig. 1 is a top view (one) of the rotor of the present invention.
Fig. 2 is a partially enlarged view of fig. 1 of the present invention.
Fig. 3 is a plan view (ii) of the rotor of the present invention.
Fig. 4 is a top view of the motor of the present invention.
1 rotor 11 rotor core
110 axle hole 111 magnetic force block
1111 magnet slot 112 arc segment
113 connecting section 114 concave section
12 magnet
2 stator
a1 Length a2 distance
D first imaginary line D1 spacing
d2 distance d3 distance
Q second imaginary line
R1 arc radius R2 arc radius
Detailed Description
For the purpose of understanding the nature, content and advantages of the present invention, as well as the advantages thereof, reference should be made to the following detailed description of the preferred embodiment, which is to be read in connection with the accompanying drawings, wherein the same or similar elements are illustrated in the drawings and are not intended to limit the utility model to the exact construction and operation illustrated and described, but rather, the utility model is to be construed broadly and limited only by the appended drawings.
The advantages, features, and technical solutions of the present invention will be more readily understood by describing in greater detail exemplary embodiments and the accompanying drawings, and the utility model may be embodied in different forms, and therefore should not be construed as limited to the embodiments set forth herein, but rather should be construed as being limited to the embodiments set forth herein and so as to provide a more complete and complete disclosure of the utility model, which is to be defined only by the appended claims.
First embodiment
First, referring to fig. 1 to 3, fig. 1 is a top view (a) of a rotor according to the present invention, fig. 2 is a partially enlarged view of fig. 1, and fig. 3 is a top view (a) of the rotor according to the present invention.
The rotor 1 includes a rotor core 11, the rotor core 11 is a cylindrical body with a predetermined length, a shaft hole 110 for installing a motor spindle (not shown) is disposed at the center of the rotor core 11, and the shaft hole 110 penetrates through two ends of the rotor core 11, i.e., the upper end and the lower end of the rotor core 11. The rotor core 11 of the present invention is formed by sequentially overlapping a plurality of silicon steel sheets from bottom to top to form the aforementioned cylindrical body, and the center of each silicon steel sheet is provided with an inner hole, and the aforementioned shaft hole 110 where the rotor core 11 is matched with a motor spindle (not shown) is formed by overlapping.
The rotor core 11 is divided into a plurality of magnetic blocks 111 by taking the shaft hole 110 as a center, and the outer contour of each magnetic block 111 is provided with an arc segment 112, two connecting segments 113 and a concave segment 114 which are connected in sequence along the circumferential direction; the arc segment 112 is adjacent to the two connecting segments 113, and the concave segment 114 is adjacent to the one connecting segment 113; the arc radius of the arc segment 112 is R1, the arc radius of the connecting segment 113 is R2, and the distance between the concave segment 114 and the center point of the rotor core 11 is d 3; the arc segment 112 and the connecting segment 113 are formed by different circle centers and different arc radii, so that the outer contour of the rotor 1 is an overall irregular circle structure.
With the above structure, the following is further described:
in this embodiment, a first imaginary line D is defined, the first imaginary line D extends from the central point of the rotor core 11 through the central point of the arc segment 112, the central point of the arc segment 112 is located on the first imaginary line D, i.e. any point on the first imaginary line D, but cannot be concentric with the central point of the rotor core 11; wherein a distance value between a center point of the arc segment 112 and a center point of the rotor core 11 is d1, a distance value between the center point of the rotor core 11 and a top end of the arc segment 112 is d2, and d1< d2 is satisfied; in other words, the center point of the arc segment 112 and the center point of the rotor core 11 are not concentric.
In the above description, the distance between the center point of the arc segment 112 and the center point of the rotor core 11 is d1, the arc radius of the connecting segment 113 is R2, and d1< R2 is satisfied; in other words, the distance between the center point of the arc segment 112 and the center point of the rotor core 11 is d1, and the length of the distance d1 does not exceed the arc radius R2 of the connecting segment 113.
Moreover, the arc radius of the connecting section 113 is R2, the distance between the center point of the rotor core 11 and the top end of the arc segment 112 is d2, the distance between the center point of the concave section 114 and the center point of the rotor core 11 is d3, and d2 ≧ R2 > d3 is satisfied; in other words, the distance d2 between the center point of the rotor core 11 and the top end of the arc segment 112 is greater than or equal to the arc radius R2 of the connecting segment 113, and the arc radius R2 of the connecting segment 113 is greater than the distance d3 between the center point of the rotor core 11 and the recessed segment 114.
In this embodiment, the rotor 1 further includes a plurality of magnets 12, and the magnets 12 are respectively disposed at the magnetic blocks 111 of the rotor core 11; the magnetic block 111 is provided with a magnet slot 1111, the magnet slot 1111 penetrates the bottom surface of the magnetic block 111 along the top surface of the magnetic block 111, the magnet slot 1111 is used for mounting the magnet 12, and the shape of the magnet slot 1111 of the magnetic block 111 is any one of a long strip shape (as shown in fig. 1) or a V shape (as shown in fig. 3).
In this embodiment, a second imaginary line Q is defined, which extends from the center point of the rotor core 11 through the center point of the recessed section 114; wherein the bottom end of the recessed section 114 is designed as a straight line, i.e. the bottom surface of the recessed section 114; the linear length of the bottom end of the concave section 114 is a1, and the connection distance between the midpoints of the two magnets 12 is a2 (as shown in fig. 2), which satisfies the following relation:
the shape of the concave section 114 is any shape; in other words, the bottom of the recessed section 114 is mainly designed as a straight line, and the shape of the two side surfaces, i.e., the two side ends, of the recessed section 114 is not limited, and the shape thereof may be flat (extending from the bottom upwards and vertically, i.e., the angle between the bottom and the two ends is 90 degrees), arc (e.g., outer arc or inner arc), inclined (extending from the bottom upwards and inclining outwards, i.e., the angle between the bottom and the two ends is greater than 90 degrees; or extending from the bottom upwards and inclining inwards, i.e., the angle between the bottom and the two ends is less than 90 degrees), or any other shape; therefore, the concave section 114 can be any one of the above shapes, and is not limited to a single shape, and the angle between the bottom and the two side ends of the concave section 114 in the drawing of this creation is 90 degrees, that is, the concave section 114 is in a rectangular shape, under this condition, the concave section 114 is prevented from being in a closed state.
Second embodiment
Referring to fig. 4, fig. 4 is a top view of the motor of the present invention, the present embodiment provides a motor, which includes a stator 2 and a rotor 1, where the rotor 1 is the aforementioned rotor 1, and the overall structure of the rotor 1 is described in the foregoing, and therefore is not described in detail. The rotor 1 is disposed inside the stator 2, and the rotor 1 can rotate relative to the stator 2.
Under the structure, the rotor core 11 is divided into a plurality of magnetic force blocks 111 by taking the shaft hole 110 as a center, each magnetic force block 111 is provided with a magnet slot 1111, the magnet 12 is arranged in the magnet slot 1111 and forms a magnetic pole, and the outer contour of each magnetic force block 111 is sequentially provided with an arc segment 112, two connecting segments 113 and a concave segment 114 which are connected along the circumferential direction; the arc segment 112 is adjacent to the two connecting segments 113, the concave segment 114 is adjacent to the one connecting segment 113, and extends through the center point of the arc segment 112 via the center point of the rotor core 11 to define a first imaginary line D, and extends through the center point of the concave segment 114 via the center point of the rotor core 11 to define a second imaginary line Q, the center point of the arc segment 112 is located on the first imaginary line D but is not concentric with the center point of the rotor core 11, so that the arc segment 112 and the connecting segment 113 are formed by different centers and different arc radii, so that the outer contour of the rotor 1 integrally presents an irregular circle structure, and thus, the air gap flux density distribution can be optimized by using the irregular circle structure, the magnetic flux is close to a sine wave, and the torque ripple is improved.
Furthermore, the center point of the rotor core 11 extends through the center point of the concave section 114 to define a second imaginary line Q, wherein the bottom end of the concave section 114 is designed as a straight line, the length of the straight line at the bottom end of the concave section 114 is a1, and the connection distance between the midpoints of the wide sides of the two magnets 12 is a2, which satisfies the following relation:
the occurrence of the closed concave section 114 is reduced, so that the concave section 114 located on the second imaginary line Q can restrict the magnetic flux flow path, so that the magnetic flux flows to the ideal magnetic path, thereby reducing the occurrence of leakage flux and optimizing the airtight magnetic flux density distribution.
In view of the above, the present invention modifies the appearance of the rotor 1 in order to reduce the fluctuation of the output torque of the motor, i.e. reduce the torque ripple and cogging torque of the motor, and its main purpose is to optimize the air-gap flux density distribution, so that the wave approaches to a sine wave, thereby reducing the air-gap magnetic field harmonic wave and reducing the torque fluctuation, and further achieving the purpose of improving the vibration noise of the motor.
However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made according to the claims and the contents of the patent specification are still included in the scope covered by the present invention.
Claims (10)
1. A rotor comprises a rotor core, the rotor core is a cylinder with a preset length, a shaft hole for installing a motor mandrel is arranged at the center of the rotor core, and the shaft hole penetrates through two ends of the rotor core, and the rotor is characterized in that:
the rotor core is averagely divided into a plurality of magnetic blocks by taking the shaft hole as the center, and the outer contour of each magnetic block is sequentially provided with an arc line section, two connecting sections and a sunken section which are connected along the circumferential direction; the arc line segment is adjacent to the space between the two connecting segments, and the sunken segment is adjacent to the connecting segment; the arc radius of the arc segment is R1, the arc radius of the connecting segment is R2, and the distance value between the concave segment and the center point of the rotor core is d 3; the arc line section and the connecting section are formed by different circle centers and different arc radiuses, so that the outer contour of the rotor integrally presents an incomplete circle structure.
2. The rotor of claim 1, wherein a first imaginary line is defined, the first imaginary line extending from a center point of the rotor core through a center point of the arc segment, the center point of the arc segment being located on the first imaginary line; the distance between the center point of the arc segment and the center point of the rotor core is d1, the distance between the center point of the rotor core and the top end of the arc segment is d2, and d1< d2 is satisfied.
3. The rotor of claim 2 wherein the arc segment has a center point spaced from the center point of the rotor core by a distance d 1; the circular arc radius of the connecting segment is R2, and d1< R2 is satisfied.
4. The rotor of claim 3, wherein the radius of the circular arc of the connection section is R2, the distance between the center point of the rotor core and the top end of the arc section is d2, the distance between the center point of the concave section and the center point of the rotor core is d3, and d2 ≧ R2 > d3 is satisfied.
5. The rotor of claim 1 further comprising a plurality of magnets disposed at each magnetic field block of the rotor core.
6. The rotor of claim 5 wherein each of the magnetic blocks has a magnet slot extending through the bottom surface of the magnetic block along the top surface of the magnetic block, the magnet slot being adapted to receive the magnet.
7. The rotor of claim 5, wherein a second imaginary line is defined, the second imaginary line extending from a center point of the rotor core through a center point of the recessed section; the bottom end of the concave section is designed to be a straight line, the length of the straight line at the bottom end of the concave section is a1, the distance value of a connecting line of the middle points of the broadsides between the two magnets is a2, and the following relational expression is satisfied:
8. the rotor of claim 7 wherein the recessed section is any shape.
9. The rotor of claim 6 wherein the magnet slots of each magnetic force block are either elongated or V-shaped.
10. An electric machine, comprising:
a stator; and
a rotor according to any one of claims 1 to 9, the rotor being disposed within the stator, the rotor being rotatable relative to the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122324847.3U CN216290391U (en) | 2021-09-24 | 2021-09-24 | Rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122324847.3U CN216290391U (en) | 2021-09-24 | 2021-09-24 | Rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216290391U true CN216290391U (en) | 2022-04-12 |
Family
ID=81065079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122324847.3U Active CN216290391U (en) | 2021-09-24 | 2021-09-24 | Rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216290391U (en) |
-
2021
- 2021-09-24 CN CN202122324847.3U patent/CN216290391U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5361942B2 (en) | Embedded magnet rotor, electric motor, compressor, air conditioner, and electric vehicle | |
| US10389216B2 (en) | Stator applicable to a single-phase or polyphase motor, motor comprising the stator and compressor comprising the motor or the stator | |
| CN101043157B (en) | Permanent magnet embedded type electric rotating machine and motor for air conditioner of car and airtight type electric compressor | |
| CN103250335B (en) | Induction motor, compressor, forced draft fan and air-conditioning | |
| JP2012105410A (en) | Electric motor and compressor | |
| CN103746473A (en) | Motor for compressor and compressor with motor | |
| CN205647074U (en) | Rotor core , rotor, motor and compressor | |
| CN216290391U (en) | Rotor and motor | |
| CN203722350U (en) | Motor for compressor and compressor with motor | |
| CN115864698A (en) | Rotor and motor | |
| WO2017202319A1 (en) | Permanent magnet synchronous motor and electric vehicle | |
| WO2017202318A1 (en) | Punching plate for motor rotor, motor rotor, motor, and electric vehicle | |
| CN209385342U (en) | A kind of cold integral type helical-lobe compressor of vertical oil | |
| CN212225520U (en) | External rotor rotary compressor | |
| TWM621912U (en) | Rotor and electrical machine | |
| CN220628967U (en) | Permanent magnet motor applied to compressor | |
| CN209267296U (en) | A kind of asymmetric low-noise motor rotor punching and a kind of rotor | |
| CN215646415U (en) | Vertical rotary compressor | |
| CN101924442B (en) | Permanent magnet synchronous motor with damping slot on rotor | |
| CN212803584U (en) | Cylinder for improving volume utilization rate of compressor and compressor | |
| CN111181338A (en) | High-voltage permanent magnet intelligent driving system for water conservancy vertical shaft | |
| CN221042411U (en) | Motor punching sheet for compressor | |
| CN214177003U (en) | Rotor core, motor, compressor and air conditioning equipment | |
| TWM648573U (en) | Permanent magnetic motor applied to compressor | |
| WO2017202317A1 (en) | Double-antipode motor and electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |