CN201466818U - Rotor iron core structure of motor - Google Patents
Rotor iron core structure of motor Download PDFInfo
- Publication number
- CN201466818U CN201466818U CN2009200452588U CN200920045258U CN201466818U CN 201466818 U CN201466818 U CN 201466818U CN 2009200452588 U CN2009200452588 U CN 2009200452588U CN 200920045258 U CN200920045258 U CN 200920045258U CN 201466818 U CN201466818 U CN 201466818U
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- motor
- rotor iron
- iron core
- rotor core
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Abstract
The utility model relates to a rotor iron core structure of a motor, which is concretely used in a cage type asynchronous motor and can lower the electromagnetic noise of the motor. The rotor iron core structure of the motor mainly comprises a first section of rotor iron core and a second section of rotor iron core. The rotor iron core structure of the motor is characterized in that the first section of rotor iron core and the second section of rotor iron core are connected by adopting a short-circuit ring. The utility model has simple, compact and reasonable structure and obvious action effect; under the situations that the structure material is not changed and the qualification of the mechanical energy property of the motor is ensured, a way of arranging the short-circuit rings on the rotor iron cores is adopted; and when the motor starts, harmonics generated by the generated electromagnetic noise are mutually counteracted because the directions of the two sections of the rotor iron cores are opposite, thus the electromagnetic noise is attenuated.
Description
Technical field
The utility model relates to a kind of rotor core structure of motor, specifically is used for squirrel cage induction motor, can reduce the motor electromagnetic noise.
Background technology
Along with the reinforcement of science and technology development and human environment protection consciousness, people more and more pay attention to the pollution from environmental noise problem, and noise is listed in three big public hazards in the lump with water pollution, air pollution.Therefore, the noise of motor becomes the key factor of examination product competitiveness, electromagnetic noise is the main source that noise of motor produces, and electromagnetic noise mainly is to be interacted and produced in time radial electromagnetic force ripple with spatial variations by the rotor harmonic field, impels stator vibration to cause.The method that reduces electromagnetic noise during general design of electrical motor has four kinds of modes:
1, reduces the breadth coefficient of stator winding harmonic wave.Principle is that stator punching groove number is increased, and increases the breadth coefficient that every extremely every phase groove number reduces high order harmonic component, reduced harmonic magnetic field, but the increase of punching groove number needs die sinking tool again, and expense is higher, and versatility is poor, and it is close to weaken yoke portion magnetic.
2, increase motor gas-gap, reduce the air gap unevenness.Electromagnetic noise decline effect is obvious, but causes power factor to reduce, and influences motor performance.
3, changing groove cooperates.Need die sinking tool again, expense is higher, and versatility is poor.
4, adopt rotor chute.For the squirrel cage induction motor below the 100KW, skewed slot is the effective measures that reduce noise, but power is big again, and particularly greater than the motor more than the 500KW, because of producing bigger transverse current between the cage bar, skewed slot may not be favourable.And skew causes additional axial force easily, and in that to eliminate synchronous additional torque and tangential vibrations thorough inadequately up and down.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby provide a kind of when motor starting, the two sections of rotor cores direction is because opposite, and the harmonic wave that the electromagnetic noise that is produced produces is cancelled out each other, and can reduce the rotor core structure of the motor of electric electromechanics magnetic noise.
According to the technical scheme that the utility model provides, a kind of rotor core structure of motor comprises first section rotor core and second section rotor core, and feature is: described first section rotor core adopts short-circuited conducting sleeve to be connected with second section rotor core.Described short-circuited conducting sleeve width is 9～11mm.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure, and action effect is obvious; Under the situation that does not change structural material, guaranteeing that employing is provided with short-circuited conducting sleeve under the motor force energy characteristic acceptance condition on rotor core; When motor starting, the two sections of rotor cores direction is because opposite, and the harmonic wave that the electromagnetic noise that is produced produces is cancelled out each other, and slackens electromagnetic noise.
Description of drawings
Fig. 1 is the utility model user mode structural representation.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1, comprise rotor end ring 1, first section rotor core 2, short-circuited conducting sleeve 3, second section rotor core 4 and armature spindle 5.
When the utility model uses left and right sides rotor end ring 1 is installed on the armature spindle 5, first section rotor core 2 and second section rotor core 4 are installed between left and right sides rotor end ring 1, described first section rotor core 2 adopts short-circuited conducting sleeve 3 to be connected with second section rotor core 4.Described short-circuited conducting sleeve 3 width are 10mm.
The utility model adopts short-circuited conducting sleeve 3 that iron core is divided into one section rotor core 2 and second section rotor core 4,4 two sections skew directions of first section rotor core 2 and second section rotor core are opposite, and a stator tooth distance of each skew 1/2, the centre links together by short-circuited conducting sleeve 3, first section rotor core 2 and second section rotor core 4 middle rotor slot-pitch that stagger half.
The utility model adopts and to change rotor core into " herringbone skew " structure, to the almost not influence of motor mechanical performance, the reduction noise effects that the rotor skew obtains also clearly, in product testing, electromagnetic noise has reduced 8-20dB.
Claims (3)
1. the rotor core structure of a motor comprises first section rotor core (2) and second section rotor core (4), it is characterized in that: described first section rotor core (2) adopts short-circuited conducting sleeve (3) to be connected with second section rotor core (4); (4) two sections skew directions of described first section rotor core (2) and second section rotor core are opposite, and a stator tooth distance of each skew 1/2.
2. the rotor core structure of a kind of motor according to claim 1 is characterized in that described short-circuited conducting sleeve (3) width is 9～11mm.
3. the rotor core structure of a kind of motor according to claim 1 is characterized in that the middle rotor slot-pitch that staggers half of described first section rotor core (2) and second section rotor core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200452588U CN201466818U (en) | 2009-05-22 | 2009-05-22 | Rotor iron core structure of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200452588U CN201466818U (en) | 2009-05-22 | 2009-05-22 | Rotor iron core structure of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466818U true CN201466818U (en) | 2010-05-12 |
Family
ID=42394165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200452588U Expired - Fee Related CN201466818U (en) | 2009-05-22 | 2009-05-22 | Rotor iron core structure of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466818U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092320A (en) * | 2014-05-21 | 2014-10-08 | 太仓东元微电机有限公司 | Motor rotor with dislocated magnet adhering |
| CN106849423A (en) * | 2017-02-28 | 2017-06-13 | 合肥工业大学 | The groove fit structures such as double skewed slots rotor, the rotor based on the rotor |
-
2009
- 2009-05-22 CN CN2009200452588U patent/CN201466818U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092320A (en) * | 2014-05-21 | 2014-10-08 | 太仓东元微电机有限公司 | Motor rotor with dislocated magnet adhering |
| CN106849423A (en) * | 2017-02-28 | 2017-06-13 | 合肥工业大学 | The groove fit structures such as double skewed slots rotor, the rotor based on the rotor |
| CN106849423B (en) * | 2017-02-28 | 2023-11-21 | 合肥工业大学 | Double-chute rotor and stator-rotor equal-groove matching structure based on same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20130522 |