CN206023524U - A kind of rotor and stator for reducing asynchronous machine vibration and noise - Google Patents
A kind of rotor and stator for reducing asynchronous machine vibration and noise Download PDFInfo
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- CN206023524U CN206023524U CN201620705104.7U CN201620705104U CN206023524U CN 206023524 U CN206023524 U CN 206023524U CN 201620705104 U CN201620705104 U CN 201620705104U CN 206023524 U CN206023524 U CN 206023524U
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Abstract
The utility model discloses a kind of rotor structure for reducing asynchronous machine vibration and noise, including the rotor tooth that is located in rotor core and rotor slot, described rotor tooth is provided with rotor recesses.The invention also discloses a kind of stator structure for reducing asynchronous machine vibration and noise, including the stator tooth that is located in stator core and stator slot, described stator tooth is provided with stator groove.This utility model is by opening up rotor recesses or opening up stator groove on the stator teeth on rotor tooth, radial electromagnetic force produced by interacting to single order stator and rotor harmony wave has significantly weakening inhibitory action, so as to effectively reduce the electric and magnetic oscillation and noise of asynchronous machine.
Description
Technical field
This utility model is related to reduce asynchronous machine vibration, field of noise, and in particular to a kind of asynchronous machine that reduces vibrates
Rotor and stator structure with noise.
Background technology
The noise that asynchronous machine is produced, is generally divided into mechanical noise, ventilation noise and electromagnetic noise.Wherein whether noise
Spectrum analyses or field test show that the ear of people is especially sensitive to the electromagnetic noise of motor.Electromagnetic noise can cause strongly
Noise feel, show as very ear-piercing howling when serious.Only reducing motor electromagnetic noise could effectively solving motor
The problem of noise pollution caused by human work's environment and living environment.
As the rotor surface of most asynchronous machine has channel opening, and channel opening can produce rotor magnetic conductance slot ripples magnetic
, while when motor run with load, rotor winding current can produce rotor windings harmony wave, both can be with vector superposed
For rotor harmony wave；In the same manner, as the stator surface of asynchronous machine has channel opening, and channel opening can produce stator magnetic conductance tooth
Harmonic field, while stator winding current can produce stator winding harmony wave, both can be with vector superposed humorous as stator tooth
Ripple magnetic field.Radial electromagnetic force will be produced when rotor harmony wave and stator harmony wave are acted on, cause motor stator,
The vibration of casing and electromagnetic noise.
Vibration that electromagnetic force wave causes and noise are on the one hand relevant with the amplitude size of Reeb, on the other hand also with Reeb
Space number of times is relevant, and number of times is lower, and the deformation of stator and casing is bigger, and caused vibration and noise are also bigger.Usual ferrum
When the heart vibrates, the amplitude of dynamic deformation is inversely proportional to the biquadratic of Reeb number of times, is directly proportional to Reeb amplitude, therefore amplitude is larger
Low order number radial direction Reeb is the main contributor for causing electromagnetic noise.In addition it should be specifically noted that, unshakable in one's determination and support has necessarily
Eigentone, when radial force wave frequency and the natural frequency are close to or even are identical, it may occur that resonance, at this moment iron core shakes
Dynamic and radiation noise will be greatly increased.
The measure for reducing asynchronous machine electromagnetic noise mainly has：(1) coordinated using groove；(2) rotor chute distance is selected；
(3) strict unit stator iron core pressing technique, improves motor assembling matter level；(4) suitably increase motor air gap.
The Chinese invention patent document of Publication No. CN 1691470A discloses a kind of change pole double speed three phase asynchronous electronic
Machine, is coordinated by changing the groove of existing change pole double speed three phase asynchronous motor, eliminates or weaken and be change pole double speed three phase asynchronous electronic
1 rank of the machine in air gap under number of poles in 2,2 ranks, 3 rank radial electromagnetic force ripples, reduce electric and magnetic oscillation, reduce electromagnetic noise.
The Chinese invention patent document of Publication No. CN 104410183A discloses a kind of the energy-efficient of low electromagnetic noise
Motor, realizes the purpose for reducing noise by the skew slot angle of the skewed slot of change casting aluminum rotor, not only reduces electromagnetic noise
Standard is reached, and has maintained classical insulation and be close to original requirement, conformance with standard has been required.
Summer widens, in ice (《Micro machine》, the impact that stator tooth is slotted to cogging torque of permanent magnet motor, 2010,43 (7):
Stator tooth fluting impact to cogging torque of permanent magnet motor 13-16) is disclosed, and this article is by auxiliary on reasonably design stator tooth
Groove is helped, can effectively suppress cogging torque.The working mechanism of the auxiliary tank in text on stator tooth is the Reeb for reducing cogging torque
Wavelength, only plays a part of to suppress cogging torque, this article not to refer to its contribution to noise of motor, do not refer to this stator
Performance impact and the suitability of the auxiliary tank on tooth to asynchronous machine.
Stator and rotor slot number very close to when, the width of rotor tooth top will be sufficiently close to the wavelength of stator slot ripples, therefore rotor
The pulsating caused by stator tooth harmonic flux in tooth is less, pulsation loss also very little.Equally, by rotor slot ripples magnetic in stator tooth
The logical pulsation loss for causing is also less.Therefore, the groove of asynchronous machine is selected to coordinate, from minimizing added losses, rotor groove
Number should be close to as far as possible, and the Reeb number of times yet with radial electromagnetic force is closely related with the difference of stator and rotor slot number, therefore nearly groove
Number of times relatively low radial electromagnetic force component in Reeb occurs during cooperation unavoidably, this reduction to noise of motor is often very unfavorable
's.
Content of the invention
The utility model proposes a kind of rotor and stator structure for reducing asynchronous machine electric and magnetic oscillation and noise, is keeping
Other performances of motor are constant or electric and magnetic oscillation and noise that in the case of varying less, effectively reduce motor, while do not increase again
The usage amount of material.
When being designed due to asynchronous machine, number of stator slots and rotor slot Number of the coordinate frequently with nearly groove, to improve the effect of motor
Rate, reduces the additional torque of motor, but nearly groove coordinates the reduction to noise of motor often very unfavorable.
In this utility model, the rotor slot number and number of stator slots are coordinated using nearly groove, specifically need to meet：
Z1- 2p-10 ＜ Z2＜ Z1+2p+10
Wherein, Z1For number of stator slots, Z2For rotor slot number, p is motor number of pole-pairs.
When motor stator structure is not changed, the technical scheme of employing is as follows：
A kind of rotor for reducing asynchronous machine vibration and noise, including the rotor tooth that is located in rotor core and rotor slot,
Described rotor tooth is provided with rotor recesses.
The rotor opens up rotor recesses in prior art basis, on rotor tooth, increases rotor airgap magnetic to reach
Lead the purpose of the space harmonics number of times of harmony wave.For motor oscillating and noise, the equivalent fluting number of rotor surface
Amount is greatly increased, and is made the cooperation of number of stator slots and rotor slot number switch to remote groove with nearly groove and is coordinated, plays the effect of vibration and noise reducing
Really.
At least rotor recesses are opened up on a rotor tooth.The width of the rotor recesses is rotor slot A/F
0.5～4 times.
Preferably, 1～2 times for rotor slot A/F of the width of the rotor recesses.Through preferred, the rotor
The single order magnetic conductance slot ripples amplitude that the single order magnetic conductance slot ripples that groove is produced is produced with the rotor slot is close to, but opposite in phase,
After both magnetic conductance slot ripples are overlapped mutually, the radial electromagnetic force caused by single order rotor magnetic conductance slot ripples is significantly weakened.
The rotor recesses are not filled with conductive material.As effective slot number that the rotor is contained within conductive material does not change
Become, and the rotor recesses is small-sized, the impact very little to performances such as the efficiency of motor, power factors.
When motor rotor construction is not changed, the technical scheme of employing is as follows：
A kind of stator for reducing asynchronous machine vibration and noise, including the stator tooth that is located in stator core and stator slot,
Described stator tooth is provided with stator groove.
The stator opens up stator groove in prior art basis, on the stator teeth, increases stator air gap magnetic to reach
Lead the purpose of the space harmonics number of times of harmony wave.For motor oscillating and noise, the equivalent fluting number of stator surface
Amount is greatly increased, and is made the cooperation of number of stator slots and rotor slot number switch to remote groove with nearly groove and is coordinated, plays the effect of vibration and noise reducing
Really.As effective slot number that the stator is contained within winding does not change, and the stator groove is small-sized, to motor
The impact very little of the performances such as efficiency, power factor.
At least stator groove is opened up on a stator tooth.The width of the stator groove is stator slot A/F
0.1～1.2 times.
Preferably, 0.3～0.7 times for stator slot A/F of the width of the stator groove.Through preferred so that
In the case of the varying less of the performances such as efficiency, power factor in motor, the radial direction that caused by stator single order magnetic conductance slot ripples
Electromagnetic force is significantly weakened.
This utility model passes through to open up rotor recesses on rotor tooth or open up stator groove on the stator teeth, to single order
Radial electromagnetic force produced by the interaction of stator and rotor harmony wave has significantly weakening inhibitory action, so as to effectively reduce
The electric and magnetic oscillation and noise of motor.
Description of the drawings
Fig. 1 is this utility model embodiment rotor and stator topological structure schematic diagram；
Structural representations of the Fig. 2 for this utility model embodiment rotor；
Structural representations of the Fig. 3 for this utility model embodiment stator.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to this utility model.
This utility model embodiment chooses certain motor product, and (seat No. is：YE2-132S1-2) as an example, the portion of motor
Divide parameter as follows：Three-phase electricity 50Hz, 380V, rated power 5.5kW, number of pole-pairs are that 1, number of stator slots is 30 and rotor slot number is
26.As shown in figure 1, in figure：1- rotor cores, 2- rotor slots, 3- rotor tooths, 4- stator cores, 5- stator slots, 6- stator tooths.
In electromagnetic noise, most prominent part is typically caused by single order stator and rotor harmony wave.For the motor,
The radial electromagnetic force harmonic component of low order is as shown in the table：
Table 1
| Harmonic component | Frequency (Hz) | Reeb number of times | Explanation |
| P1 | 1400 | 2 | Single order slot ripples |
| P2 | 1300 | 4 | Single order slot ripples |
| P3 | 1200 | 6 | Single order slot ripples |
| P4 | 2700 | 6 | Second order slot ripples |
| P5 | 2600 | 8 | Second order slot ripples |
| P6 | 2500 | 10 | Second order slot ripples |
As shown in table 1, for the Reeb number of times of the motor, harmonic component P1 and P2 is less, and be all as single order is fixed,
Rotor slot ripples is produced, and therefore the amplitude of Reeb is also maximum, so P1 and P2 are the most important factors for producing electromagnetic noise.
Although this utility model embodiment chooses certain motor product as an example, but this utility model is equally applicable to
The asynchronous machine for having different rotor and number of stator slots, grooved different.
Embodiment 1
The present embodiment keeps original motor stator structure constant, opens up a rotor recessed on rotor tooth 3 as shown in Figure 1
Groove, has just obtained the rotor structure of the present embodiment, as shown in Figure 2.It should be noted that the rotor recesses can not fill conduction
Material.The shape of the groove, size, position and quantity can be done certain adjustment according to real electrical machinery practical situation and still fit
For this utility model.
For the rotor structure of the present embodiment, due to having opened up rotor recesses on rotor tooth, then for rotor
For magnetic conductance slot ripples, the equivalent slot number of rotor surface is double.
The optimized size for designing the rotor recesses, the width for making the rotor recesses are 2 times of rotor well width, this
When, the single order magnetic conductance slot ripples produced by the rotor recesses and single order magnetic conductance slot ripples amplitude produced by the original channel opening of rotor
Essentially identical, but phase place is substantially opposite, after both magnetic conductance slot ripples are overlapped mutually, the P1 that caused by rotor magnetic conductance slot ripples,
P2 and P3 is significantly weakened.Although due to the impact of rotor recesses, the second order magnetic conductance slot ripples component of rotor may increase
Greatly, i.e. the amplitude of P4, P5 and P6 will increase, but due to second order rotor slot ripples and second order stator tooth harmonic interactions, phase
Less than in single order magnetic conductance slot ripples amplitude, and Reeb number of times also increases, and therefore the increase of P4, P5 and P6 amplitude is to motor electricity
Magnetic vibration and effect of noise can not show a candle to the reduction of P1, P2 and P3 amplitude substantially, so as to the electric and magnetic oscillation and noise of motor totality
Significantly will reduce.
Embodiment 2
The present embodiment keeps original motor rotor structure constant, opens up a stator recessed on stator tooth 6 as shown in Figure 1
Groove, has just obtained the stator structure of the present embodiment, as shown in figure 3, the shape of the groove, size, position and quantity can be with roots
Certain adjustment is done according to real electrical machinery practical situation and is still applied to this utility model.
For the present embodiment stator structure, due to having opened up a stator groove on the stator teeth, then for stator magnet
For leading slot ripples, the equivalent slot number of stator surface is double.
The optimized size for designing the stator groove, the width for making the stator groove are 0.6 times of stator well width,
After both magnetic conductance slot ripples are overlapped mutually, P1, P2 and P3 for being caused by stator magnetic conductance slot ripples are significantly weakened.Although by
In the impact of stator groove, the second order magnetic conductance slot ripples component of stator may increase, i.e., the amplitude of P4, P5 and P6 will increase
Greatly, but due to second order stator slot ripples and second order rotor tooth harmonic interactions, compared to single order magnetic conductance slot ripples amplitude compared with
Little, and Reeb number of times also increases, and therefore the increase of P4, P5 and P6 amplitude is vibrated to motor electromagnetic and effect of noise can not show a candle to
It is obvious that the reduction of P1, P2 and P3 amplitude comes, so as to the electric and magnetic oscillation and noise of motor totality significantly will reduce.
Claims (6)
1. a kind of rotor for reducing asynchronous machine vibration and noise, including the rotor tooth that is located in rotor core and rotor slot, its
It is characterised by, described rotor tooth is provided with rotor recesses.
2. the asynchronous machine that reduces as claimed in claim 1 vibrates the rotor with noise, it is characterised in that the rotor recesses
0.5～4 times for rotor slot A/F of width.
3. the asynchronous machine that reduces as claimed in claim 1 vibrates the rotor with noise, it is characterised in that the rotor recesses
1～2 times for rotor slot A/F of width.
4. a kind of stator for reducing asynchronous machine vibration and noise, including the stator tooth that is located in stator core and stator slot, its
It is characterised by, described stator tooth is provided with stator groove.
5. the asynchronous machine that reduces as claimed in claim 4 vibrates the stator with noise, it is characterised in that the stator groove
0.1～1.2 times for stator slot A/F of width.
6. the asynchronous machine that reduces as claimed in claim 4 vibrates the stator with noise, it is characterised in that the stator groove
0.3～0.7 times for stator slot A/F of width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620705104.7U CN206023524U (en) | 2016-07-01 | 2016-07-01 | A kind of rotor and stator for reducing asynchronous machine vibration and noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620705104.7U CN206023524U (en) | 2016-07-01 | 2016-07-01 | A kind of rotor and stator for reducing asynchronous machine vibration and noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206023524U true CN206023524U (en) | 2017-03-15 |
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ID=58244630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620705104.7U Active CN206023524U (en) | 2016-07-01 | 2016-07-01 | A kind of rotor and stator for reducing asynchronous machine vibration and noise |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026579A (en) * | 2016-07-01 | 2016-10-12 | 浙江大学 | Rotor or stator structure for reducing vibration and noise of asynchronous motor |
| CN109586441A (en) * | 2018-11-27 | 2019-04-05 | 东南大学 | A kind of acting type motor rotor constructions such as air-gap field |
| CN116317228A (en) * | 2023-04-04 | 2023-06-23 | 湖南科技大学 | Electromagnetic noise reduction optimization design method for alternating-current traction motor |
-
2016
- 2016-07-01 CN CN201620705104.7U patent/CN206023524U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026579A (en) * | 2016-07-01 | 2016-10-12 | 浙江大学 | Rotor or stator structure for reducing vibration and noise of asynchronous motor |
| CN109586441A (en) * | 2018-11-27 | 2019-04-05 | 东南大学 | A kind of acting type motor rotor constructions such as air-gap field |
| CN116317228A (en) * | 2023-04-04 | 2023-06-23 | 湖南科技大学 | Electromagnetic noise reduction optimization design method for alternating-current traction motor |
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| GR01 | Patent grant |