CN110829655A - Rotor structure of permanent magnet motor - Google Patents
Rotor structure of permanent magnet motor Download PDFInfo
- Publication number
- CN110829655A CN110829655A CN201911255031.0A CN201911255031A CN110829655A CN 110829655 A CN110829655 A CN 110829655A CN 201911255031 A CN201911255031 A CN 201911255031A CN 110829655 A CN110829655 A CN 110829655A
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- China
- Prior art keywords
- permanent magnet
- rotor
- magnetic pole
- magnetizer
- magnetic
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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
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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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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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
Abstract
The invention relates to the technical field of permanent magnet motors, and discloses a rotor structure of a permanent magnet motor, which comprises a magnetizer and a permanent magnet group; the permanent magnet groups are circumferentially arrayed on the magnetizer and divide the magnetizer into a rotor inner-layer magnetic pole and a rotor outer-layer magnetic pole; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet group comprises a left permanent magnet and a right permanent magnet, gaps are arranged at the inner ends of the left permanent magnet and the right permanent magnet, and isolation reinforcing pieces made of non-magnetic materials are arranged at the outer ends of the left permanent magnet and the right permanent magnet. The rotor structure is provided with two magnetic poles on the inner side and the outer side, each magnetic pole of the rotor is composed of two groups of independent magnetic fields to form two magnetic circuits, when the magnetic field of the stator changes, one magnetic field of the rotor magnetic pole of the structure can be enhanced, and the other magnetic field of the rotor magnetic pole of the structure can be reduced. The stator magnetic field drives the rotor to rotate and simultaneously controls the size change of two magnetic fields of the rotor magnetic poles, and the efficiency of the motor is improved by the size change of two magnetic circuits of the rotor.
Description
Technical Field
The invention relates to the technical field of permanent magnet motors, in particular to a rotor structure of a permanent magnet motor.
Background
With the development of motor technology and permanent magnet materials, the permanent magnet rotor has been widely applied to generators and motor systems due to its advantages of high efficiency, high power density, high power factor, etc.
The permanent magnet motor at the present stage has only one group of magnetic fields of rotor magnetic poles, each magnetic pole has only one magnetic circuit, and the magnetic fields of the rotor magnetic poles are all fixed and unchangeable. In the actual operation of the motor, the work is only done by the way that the stator magnetic field drags the rotor magnetic field to rotate, and the stator magnetic field can only do work on the rotor singly. This limits the efficiency and power density of the motor.
Disclosure of Invention
The invention mainly provides a rotor structure of a permanent magnet motor, which solves the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a rotor structure of a permanent magnet motor comprises a magnetizer and a permanent magnet group; the permanent magnet groups are circumferentially arrayed on the magnetizer and divide the magnetizer into a rotor inner-layer magnetic pole and a rotor outer-layer magnetic pole; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet group comprises a left permanent magnet and a right permanent magnet, gaps are formed in the inner ends of the left permanent magnet and the right permanent magnet, and isolation reinforcing pieces made of non-magnetic materials are arranged at the outer ends of the left permanent magnet and the right permanent magnet.
Further, the thickness of the rotor inner layer magnetic pole is 5mm to 10mm, and the thickness of the rotor outer layer magnetic pole is the same as that of the rotor inner layer magnetic pole.
Further, the thickness of the left permanent magnet is 4mm to 6mm as the thickness of the right permanent magnet.
Further, the spacing of the isolation reinforcement between the adjacent permanent magnet groups is 1mm to 3 mm.
Further, the distance from the inner end face of the isolation reinforcing part to the inner wall of the rotor inner-layer magnetic pole is 0.5mm to 1mm, and the distance from the outer end face of the isolation reinforcing part to the outer wall of the rotor outer-layer magnetic pole is 0.5mm to 1 mm.
Furthermore, a side surface of the isolation reinforcing piece, which is close to the left permanent magnet and the right permanent magnet, is provided with a recess.
Further, the thickness of the isolation reinforcement in the array direction of the permanent magnet groups is 5mm to 10 mm.
Furthermore, the left permanent magnet and the right permanent magnet are provided with grooves on one surface of the inner magnetic pole of the rotor, and the inner magnetic pole of the rotor is provided with raised strips matched with the grooves.
Further, the device also comprises a front end cover; the front end cover is arranged at the front end of the magnetizer, and a rotating shaft which is coaxial with the magnetizer and an installation position for installing a bearing are arranged on the front end cover; a flange is arranged between the front end cover and the magnetizer, and a bolt used for connecting the flanges at two ends of the magnetizer penetrates through the gap.
Furthermore, the magnetizer is formed by laminating silicon steel sheets.
Has the advantages that: the rotor structure of the invention utilizes the permanent magnet group to divide the magnetizer into the magnetic pole at the inner layer of the rotor and the magnetic pole at the outer layer of the rotor to be used as the inner magnetic pole and the outer magnetic pole of the rotor, and utilizes the permanent magnet group as the constant magnetic source of the rotor to provide magnetic force for the inner magnetic pole and the outer magnetic pole. The rotor structure is provided with two magnetic poles on the inner side and the outer side, each magnetic pole of the rotor is composed of two groups of independent magnetic fields to form two magnetic circuits, when the magnetic field of the stator changes, one magnetic field of the rotor magnetic pole of the structure can be enhanced, and the other magnetic field of the rotor magnetic pole of the structure can be reduced. The stator magnetic field drives the rotor to rotate and simultaneously controls the size change of two magnetic fields of the rotor magnetic poles, and the efficiency of the motor is improved by the size change of two magnetic circuits of the rotor.
Drawings
FIG. 1 is a schematic cross-sectional view of a rotor structure according to the present embodiment;
fig. 2 is a schematic view of the structure of the magnetizer according to the embodiment;
fig. 3 is an enlarged view of the part a of the present embodiment.
Reference numerals: the magnetic rotor comprises a magnetizer 1, a rotor inner-layer magnetic pole 11, a rotor outer-layer magnetic pole 12, a convex strip 13, a permanent magnet group 2, a left permanent magnet 21, a right permanent magnet 22, a groove 23, a gap 3, an isolation reinforcing part 4, a recess 41, a front end cover 5, a mounting position 51, a flange 6 and a rotating shaft 7.
Detailed Description
The technical solution of the rotor structure of a permanent magnet motor according to the present invention will be described in further detail with reference to the following embodiments.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, fig. 2, and fig. 3, the rotor structure of a permanent magnet motor according to this embodiment includes a magnetizer 1 and a permanent magnet group 2; the permanent magnet groups 2 are circumferentially arrayed on the magnetizer 1, and the magnetizer 1 is divided into a rotor inner-layer magnetic pole 11 and a rotor outer-layer magnetic pole 12 by the permanent magnet groups 2; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet group 2 comprises a left permanent magnet 21 and a right permanent magnet 22, gaps 3 are arranged at the inner ends of the left permanent magnet 21 and the right permanent magnet 22, and isolation reinforcing pieces 4 made of non-magnetic materials are arranged at the outer ends of the left permanent magnet 21 and the right permanent magnet 22. The left permanent magnet 21 and the right permanent magnet 22 are positioned on one surface of the rotor inner layer magnetic pole 11, a groove 23 is formed in one surface of the rotor inner layer magnetic pole 11, and a protruding strip 13 matched with the groove 23 is arranged on the rotor inner layer magnetic pole 11. Also comprises a front end cover 5; the front end cover 5 is arranged at the front end of the magnetizer 1, and the front end cover 5 is provided with a rotating shaft 7 which is coaxial with the magnetizer 1 and an installation position 51 for installing a bearing; a flange 6 is arranged between the front end cover 5 and the magnetizer, and a bolt for connecting the flanges 6 at two ends of the magnetizer 1 penetrates through the gap. The magnetizer 1 is formed by laminating silicon steel sheets. The thickness of the rotor inner layer magnetic pole 11 is 5mm to 10mm, and the thickness of the rotor outer layer magnetic pole 12 is the same as that of the rotor inner layer magnetic pole 11. The thicknesses of the left permanent magnet 21 and the right permanent magnet 22 are the same and are both 4mm to 6 mm. The spacing of the isolation reinforcement 4 between the adjacent permanent magnet groups is 1mm to 3 mm. The distance from the inner end face of the isolation reinforcing part 4 to the inner wall of the rotor inner layer magnetic pole 11 is 0.5mm to 1mm, and the distance from the outer end face of the isolation reinforcing part 4 to the outer wall of the rotor outer layer magnetic pole 12 is 0.5mm to 1 mm. A recess 41 is provided on one side of the isolation reinforcement 4 near the left permanent magnet 21 and the right permanent magnet 22. The thickness of the isolation reinforcement 4 in the array direction of the permanent magnet groups is 5mm to 10 mm.
Specifically, the thickness of the rotor inner layer magnetic pole 11 is the same as that of the rotor outer layer magnetic pole 12, and the thickness of the rotor inner layer magnetic pole 11 is set as a; the left permanent magnet 21 and the right permanent magnet 22 have the same thickness, and the thickness of the left permanent magnet 21 is b; the thickness of the insulating reinforcement 4 is set to c; the distance between adjacent insulating reinforcement members 4 is set to d; the distance from the inner end surface of the isolation reinforcing member 4 to the inner wall of the rotor inner-layer magnetic pole 11 is set as e; the distance from the outer end face of the isolation reinforcing member 4 to the inner wall of the rotor outer layer magnetic pole 12 is set as f; in this example, a is 6mm, b is 5mm, c is 7mm, d is 2mm, e is 0.8mm, and f is 0.8 mm.
The rotor structure of the invention utilizes the permanent magnet group 2 to divide the magnetizer 1 into the inner magnetic pole 11 of the rotor and the outer magnetic pole 12 of the rotor, which are used as the inner magnetic pole and the outer magnetic pole of the rotor, and utilizes the permanent magnet group 2 as the constant magnetic source of the rotor to provide magnetic force for the inner magnetic pole and the outer magnetic pole. The rotor structure is provided with two magnetic poles on the inner side and the outer side, each magnetic pole of the rotor is composed of two groups of independent magnetic fields to form two magnetic circuits, when the magnetic field of the stator changes, one magnetic field of the rotor magnetic pole of the structure can be enhanced, and the other magnetic field of the rotor magnetic pole of the structure can be reduced. The stator magnetic field drives the rotor to rotate and simultaneously controls the size change of two magnetic fields of the rotor magnetic poles, and the efficiency of the motor is improved by the size change of two magnetic circuits of the rotor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A rotor structure of a permanent magnet motor is characterized in that: comprises a magnetizer and a permanent magnet group; the permanent magnet groups are circumferentially arrayed on the magnetizer and divide the magnetizer into a rotor inner-layer magnetic pole and a rotor outer-layer magnetic pole; the magnetizing directions of the adjacent permanent magnet groups are opposite; the permanent magnet group comprises a left permanent magnet and a right permanent magnet, gaps are formed in the inner ends of the left permanent magnet and the right permanent magnet, and isolation reinforcing pieces made of non-magnetic materials are arranged at the outer ends of the left permanent magnet and the right permanent magnet.
2. The rotor structure of a permanent magnet motor according to claim 1, wherein: the thickness of the rotor inner layer magnetic pole is 5mm to 10mm, and the thickness of the rotor outer layer magnetic pole is the same as that of the rotor inner layer magnetic pole.
3. The rotor structure of a permanent magnet motor according to claim 1, wherein: the thickness of the left permanent magnet is 4mm to 6mm as the thickness of the right permanent magnet.
4. The rotor structure of a permanent magnet motor according to claim 1, wherein: the spacing of the isolation reinforcing parts between the adjacent permanent magnet groups is 1mm to 3 mm.
5. The rotor structure of a permanent magnet motor according to claim 1, wherein: the distance from the inner end face of the isolation reinforcing part to the inner wall of the rotor inner-layer magnetic pole is 0.5mm to 1mm, and the distance from the outer end face of the isolation reinforcing part to the outer wall of the rotor outer-layer magnetic pole is 0.5mm to 1 mm.
6. The rotor structure of a permanent magnet motor according to claim 1, wherein: and a concave part is arranged on one side surface of the isolation reinforcing part close to the left permanent magnet and the right permanent magnet.
7. The rotor structure of a permanent magnet motor according to claim 1, wherein: the thickness of the isolation reinforcing piece in the array direction of the permanent magnet groups is 5mm to 10 mm.
8. The rotor structure of a permanent magnet motor according to claim 1, wherein: and one surfaces of the left permanent magnet and the right permanent magnet, which are positioned on the inner magnetic pole of the rotor, are provided with grooves, and the inner magnetic pole of the rotor is provided with raised strips matched with the grooves.
9. The rotor structure of a permanent magnet motor according to claim 1, wherein: the device also comprises a front end cover; the front end cover is arranged at the front end of the magnetizer, and a rotating shaft which is coaxial with the magnetizer and an installation position for installing a bearing are arranged on the front end cover; a flange is arranged between the front end cover and the magnetizer, and a bolt used for connecting the flanges at two ends of the magnetizer penetrates through the gap.
10. The rotor structure of a permanent magnet motor according to claim 1, wherein: the magnetizer is formed by laminating silicon steel sheets.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255031.0A CN110829655A (en) | 2019-12-09 | 2019-12-09 | Rotor structure of permanent magnet motor |
| PCT/CN2020/071215 WO2021114450A1 (en) | 2019-12-09 | 2020-01-09 | Rotor structure of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255031.0A CN110829655A (en) | 2019-12-09 | 2019-12-09 | Rotor structure of permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110829655A true CN110829655A (en) | 2020-02-21 |
Family
ID=69544177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911255031.0A Pending CN110829655A (en) | 2019-12-09 | 2019-12-09 | Rotor structure of permanent magnet motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110829655A (en) |
| WO (1) | WO2021114450A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007259636A (en) * | 2006-03-24 | 2007-10-04 | Honda Motor Co Ltd | Motor |
| CN201122886Y (en) * | 2007-11-28 | 2008-09-24 | 刘侃 | Permanent magnet type self-starting DC motor rotor improvement structure |
| CN103872868A (en) * | 2012-12-07 | 2014-06-18 | 株式会社电装 | Multi-gap type rotary electric machine |
| CN204271774U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of high-speed permanent magnetic electro spindle inner electric machine rotor punching structure |
| US20160094098A1 (en) * | 2014-09-30 | 2016-03-31 | Denso Corporation | Rotor and rotating electric machine |
| CN110212668A (en) * | 2019-07-07 | 2019-09-06 | 东莞贰零壹捌电力科技有限公司 | The rotor structure of two-way change magneto |
| CN110212723A (en) * | 2019-07-07 | 2019-09-06 | 东莞贰零壹捌电力科技有限公司 | Two-way change magneto |
-
2019
- 2019-12-09 CN CN201911255031.0A patent/CN110829655A/en active Pending
-
2020
- 2020-01-09 WO PCT/CN2020/071215 patent/WO2021114450A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007259636A (en) * | 2006-03-24 | 2007-10-04 | Honda Motor Co Ltd | Motor |
| CN201122886Y (en) * | 2007-11-28 | 2008-09-24 | 刘侃 | Permanent magnet type self-starting DC motor rotor improvement structure |
| CN103872868A (en) * | 2012-12-07 | 2014-06-18 | 株式会社电装 | Multi-gap type rotary electric machine |
| CN204271774U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of high-speed permanent magnetic electro spindle inner electric machine rotor punching structure |
| US20160094098A1 (en) * | 2014-09-30 | 2016-03-31 | Denso Corporation | Rotor and rotating electric machine |
| CN110212668A (en) * | 2019-07-07 | 2019-09-06 | 东莞贰零壹捌电力科技有限公司 | The rotor structure of two-way change magneto |
| CN110212723A (en) * | 2019-07-07 | 2019-09-06 | 东莞贰零壹捌电力科技有限公司 | Two-way change magneto |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021114450A1 (en) | 2021-06-17 |
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Application publication date: 20200221 |
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| RJ01 | Rejection of invention patent application after publication |