CN109742917B - Rotor fixing structure of double-rotor permanent magnet synchronous motor - Google Patents
Rotor fixing structure of double-rotor permanent magnet synchronous motor Download PDFInfo
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- CN109742917B CN109742917B CN201910152003.XA CN201910152003A CN109742917B CN 109742917 B CN109742917 B CN 109742917B CN 201910152003 A CN201910152003 A CN 201910152003A CN 109742917 B CN109742917 B CN 109742917B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The application discloses a rotor fixing structure of a double-rotor permanent magnet synchronous motor, which comprises an annular stator core, wherein an annular boss extends out of an annular surface of one side end surface part of the stator core along the axial direction, a concentric inner bearing is nested in an inner hole of the annular boss, and a concentric outer bearing is fixedly sleeved on the peripheral outer end surface; the outer diameter of the inner bearing outer ring is the same as the inner diameter of the annular boss, the contact surfaces of the inner bearing outer ring and the annular boss are fixedly connected, and the inner diameter of the inner bearing inner ring is smaller than the inner diameter of the stator core; the inner diameter of the outer bearing inner ring is the same as the outer diameter of the annular boss, the contact surfaces of the outer bearing inner ring and the annular boss are fixedly connected, and the outer diameter of the outer bearing outer ring is larger than the outer diameter of the stator core. The beneficial effects of the application are as follows: through being equipped with inside and outside bearing on stator core, combine the connected mode of inside and outside rotor and end cover on the original design, realize the double bracing rotation of inside and outside rotor, the rotation axle center of the inside and outside rotor of effectual assurance is located the motor rotation axle center of settlement all the time, and the specification selection of inside and outside bearing guarantees that the air gap is even all the time simultaneously, and the motor operation is stable.
Description
Technical Field
The invention relates to a rotor fixing structure of a double-rotor permanent magnet synchronous motor, and belongs to the technical field of motor design and manufacturing.
Background
Along with the development of science and technology, the development level of the modern industry is higher and higher, and the requirements of people on the motor performance are also continuously improved. The permanent magnet motor is one kind of synchronous motor, and its exciting magnetic field has permanent magnet produced, and this eliminates exciting loss and raises the utilization rate and conversion rate of energy.
The annular winding double-rotor permanent magnet synchronous motor with the Chinese patent publication number of CN208028753U comprises an inner rotor and an outer rotor, wherein an annular winding is arranged between the inner rotor and the outer rotor, so that the energy conversion efficiency is higher under the condition that the same input voltage and current, namely the same input power of a power supply, and larger torque can be provided. The motor has the advantages of small volume, high efficiency, high power factor, good heat dissipation performance and the like. However, the inner rotor and the outer rotor of the motor are rotationally connected through a bearing at an end cover at one side of the motor, so that the stability is not enough. When the motor is operated, the actual rotation axes of the inner rotor and the outer rotor deviate from the set rotation axis of the motor, so that an air gap is uneven, the air gap flux density of the motor is affected, and unstable operation of the motor is caused.
Disclosure of Invention
In order to overcome the defects, the invention provides a rotor fixing structure of a double-rotor permanent magnet synchronous motor, which can effectively keep coaxiality and stable air gap uniformity when inner and outer rotors rotate.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the rotor fixing structure of the double-rotor permanent magnet synchronous motor comprises an annular stator core, wherein an annular boss extends out of an annular surface of one side end surface part of the stator core along the axial direction, a concentric inner bearing is nested in an inner hole of the annular boss, and a concentric outer bearing is fixedly sleeved on the circumferential outer end surface; the outer diameter of the inner bearing outer ring is the same as the inner diameter of the annular boss, the contact surfaces of the inner bearing outer ring and the annular boss are fixedly connected, and the inner diameter of the inner bearing inner ring is smaller than the inner diameter of the stator core; the inner diameter of the outer bearing inner ring is the same as the outer diameter of the annular boss, the outer bearing outer ring is fixedly connected with the contact surface of the outer bearing inner ring and the annular boss, and the outer diameter of the outer bearing outer ring is larger than the outer diameter of the stator core.
Preferably, the contact surface fixed connection is an interference fit fixed connection or an adhesive fixed connection.
When in practical application, the outer rotor is arranged on the outer ring of the stator core, is rotationally connected with the stator core through the outer bearing, and is rotationally connected with the end cover bearing at one side through the outer bearing, and the thickness of an air gap between the outer rotor and the stator core is the difference distance that the outer diameter of the outer bearing is larger than the outer diameter of the stator core; the inner rotor is arranged on the inner ring of the stator core, is rotationally connected with the stator core through an inner bearing, is rotationally connected with one side end cover bearing through the inner bearing, and the thickness of an air gap between the inner rotor and the stator core is the difference distance that the inner diameter of the inner bearing is smaller than the inner diameter of the stator core.
It should be well known to those skilled in the art that: according to the size of motor design specification, the protruding length of annular boss is rationally selected, simultaneously according to the design needs outer bearing and the inner bearing of suitable size be used for guaranteeing the air gap thickness between inside and outside rotor and stator core, and other not disclosed birotor PMSM's structure all belong to the conventional means and common sense of the person skilled in the art, and its specific description and drawings are omitted to the application.
The beneficial effects of the application are as follows: through being equipped with inside and outside bearing on stator core, combine the connected mode of inside and outside rotor and end cover on the original design, realize the double bracing rotation of inside and outside rotor, the rotation axle center of the inside and outside rotor of effectual assurance is located the motor rotation axle center of settlement all the time, and the specification selection of inside and outside bearing guarantees that the air gap is even all the time simultaneously, and the motor operation is stable.
Drawings
Fig. 1 is a schematic view of a partial cross-section of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic structural view of a stator core according to the present invention.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1-3, a rotor fixing structure of a double-rotor permanent magnet synchronous motor comprises an annular stator core 001, wherein an annular boss 003 extends out of an annular surface of one side end surface part of the stator core 001 along the axial direction, a concentric inner bearing 004 is nested in an inner hole of the annular boss 003, and a concentric outer bearing 002 is fixedly sleeved on the circumferential outer end surface; the outer diameter of the inner ring of the inner bearing 004 is the same as the inner diameter of the annular boss 003, and the contact surfaces of the inner ring and the annular boss are fixedly connected, and the inner diameter of the inner ring of the inner bearing 004 is smaller than the inner diameter of the stator core 001; the inner diameter of the inner ring of the outer bearing 002 is the same as the outer diameter of the annular boss 003, the outer ring of the outer bearing 002 is fixedly connected with the outer ring of the annular boss 003, and the outer diameter of the outer ring of the outer bearing 002 is larger than the outer diameter of the stator core 001.
In order to ensure the bonding strength of the inner and outer bearings (004,002) and the annular boss 003, the contact surface is fixedly connected in an interference fit or bonding manner.
When in practical application, the outer rotor is arranged on the outer ring of the stator core 001, is rotationally connected with the stator core 001 through the outer bearing 002, and is rotationally connected with one side end cover bearing through the outer bearing 002, and the thickness of an air gap between the outer rotor and the stator core 001 is the difference distance that the outer diameter of the outer bearing 002 is larger than the outer diameter 001 of the stator core; the inner rotor sets up in stator core 001 inner circle, rotates through inner bearing 004 and stator core 001 to rotate through inner bearing 004 and one side end cover bearing and be connected, the air gap thickness between inner rotor and the stator core 001 is the difference distance that inner bearing 004 internal diameter is less than stator core 001 internal diameter.
It should be well known to those skilled in the art that: the protruding length of the annular boss 003 is reasonably selected according to the design specification of the motor, and meanwhile, the outer bearing 002 and the inner bearing 004 with proper sizes are selected according to design requirements to ensure the thickness of an air gap between an inner rotor and an outer rotor and a stator core, and the structure of other undisclosed double-rotor permanent magnet synchronous motors belong to conventional means and common sense of those skilled in the art, and the specific description and the accompanying drawings are omitted.
The technical scheme of the invention is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the invention fall within the protection scope of the invention.
Claims (1)
1. The utility model provides a birotor permanent magnet synchronous motor rotor fixed knot constructs, includes annular stator core, its characterized in that: an annular boss extends outwards along the axial direction from the annular surface of one side end surface part of the stator core, a concentric inner bearing is nested in an inner hole of the annular boss, and a concentric outer bearing is fixedly sleeved on the circumferential outer end surface; the outer diameter of the inner bearing outer ring is the same as the inner diameter of the annular boss, the contact surfaces of the inner bearing outer ring and the annular boss are fixedly connected, and the inner diameter of the inner bearing inner ring is smaller than the inner diameter of the stator core; the inner diameter of the outer bearing inner ring is the same as the outer diameter of the annular boss, the contact surfaces of the outer bearing inner ring and the annular boss are fixedly connected, and the outer diameter of the outer bearing outer ring is larger than the outer diameter of the stator core; the contact surface is fixedly connected in an interference fit or bonding mode; the outer rotor is arranged on the outer ring of the stator core, is rotationally connected with the stator core through an outer bearing, and is rotationally connected with one side of a motor end cover bearing through the outer bearing, and the thickness of an air gap between the outer rotor and the stator core is the difference distance that the outer diameter of the outer bearing is larger than the outer diameter of the stator core; the inner rotor is arranged on the inner ring of the stator core, is rotationally connected with the stator core through an inner bearing, is rotationally connected with one side of the motor end cover bearing through the inner bearing, and the thickness of an air gap between the inner rotor and the stator core is the difference distance that the inner diameter of the inner bearing is smaller than the inner diameter of the stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910152003.XA CN109742917B (en) | 2019-02-28 | 2019-02-28 | Rotor fixing structure of double-rotor permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910152003.XA CN109742917B (en) | 2019-02-28 | 2019-02-28 | Rotor fixing structure of double-rotor permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109742917A CN109742917A (en) | 2019-05-10 |
| CN109742917B true CN109742917B (en) | 2024-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910152003.XA Active CN109742917B (en) | 2019-02-28 | 2019-02-28 | Rotor fixing structure of double-rotor permanent magnet synchronous motor |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003299326A (en) * | 2002-04-01 | 2003-10-17 | Nissan Motor Co Ltd | Outer rotor structure of rotating electric machine |
| CN209389893U (en) * | 2019-02-28 | 2019-09-13 | 郑州大学 | A rotor fixing structure of a double-rotor permanent magnet synchronous motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3716808B2 (en) * | 2002-04-01 | 2005-11-16 | 日産自動車株式会社 | Rotating electric machine |
| US7750521B2 (en) * | 2006-12-07 | 2010-07-06 | General Electric Company | Double-sided starter/generator for aircrafts |
| CN102795102B (en) * | 2012-08-01 | 2015-07-08 | 江苏大学 | Electric wheel integrated with rim speed reducing function and control method thereof |
| CN208028753U (en) * | 2017-10-17 | 2018-10-30 | 河南理工大学 | A double-rotor permanent magnet synchronous motor with ring winding |
-
2019
- 2019-02-28 CN CN201910152003.XA patent/CN109742917B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003299326A (en) * | 2002-04-01 | 2003-10-17 | Nissan Motor Co Ltd | Outer rotor structure of rotating electric machine |
| CN209389893U (en) * | 2019-02-28 | 2019-09-13 | 郑州大学 | A rotor fixing structure of a double-rotor permanent magnet synchronous motor |
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| Publication number | Publication date |
|---|---|
| CN109742917A (en) | 2019-05-10 |
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