CN102394522A - Stator capable of reducing vibration and noise caused by eccentricity - Google Patents
Stator capable of reducing vibration and noise caused by eccentricity Download PDFInfo
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- CN102394522A CN102394522A CN2011104138568A CN201110413856A CN102394522A CN 102394522 A CN102394522 A CN 102394522A CN 2011104138568 A CN2011104138568 A CN 2011104138568A CN 201110413856 A CN201110413856 A CN 201110413856A CN 102394522 A CN102394522 A CN 102394522A
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Abstract
The invention aims at providing a stator capable of reducing vibration and noise caused by eccentricity. Costs are low. The stator can effectively reduce the vibration and noise caused by the eccentricity of a rotor installed in the stator. In order to achieve the effect, the stator capable of reducing the vibration and noise caused by the eccentricity of the invention comprises three-phase branches which are parallelly connected with each other. The each branch is provided with at least two groups of windings. Numbers of turns wound around the each winding are the same. The windings on the each branch are mutually parallelly connected. In the structure, a plurality of the windings are parallelly connected on the each branch of the stator. During working, once the rotor generates the eccentricity, reactance drops of the windings on the each branch increase successively. Therefore, currents flowed through the each winding reduce successively. The larger current flows through a first winding, which can compensate imbalance of magnetic flux distribution at a certain degree. Unbalanced magnetic pull and the low-frequency electromagnetic noise can be reduced so that the effects of noise control and vibration reduction can be achieved.
Description
Technical field
The present invention relates to a kind of motor stator, relate in particular to a kind of eccentric stator that causes noise and vibration of minimizing that is used for threephase asynchronous machine.
Background technology
Threephase asynchronous machine is a kind of motor very commonly used.Its operation principle is the threephase stator winding of motor, respectively differs 120 degree electrical degrees.After feeding three-phase symmetrical alternating current electricity, will produce a rotating magnetic field, this rotating magnetic field cutting rotor winding; Thereby in the rotor winding, produce induced current; This moment, the rotor winding was a close access, and the rotor conductor of current-carrying will produce electromagnetic force under the effect of stator rotating magnetic field, thereby on machine shaft, will form electromagnetic torque; The drive motor rotation, and the motor direction of rotation is identical with the rotating magnetic field direction.By the difference of structure, threephase asynchronous can be divided into two kinds of cage and Wound-rotor types.Because the motor of cage can not be regulated the speed, so the common threephase asynchronous machine that adopts Wound-rotor type in the prior art.With three-phase 4 utmost point motors is example, as accompanying drawing 1, shown in Figure 2 be the sketch map of the stator of three-phase 4 utmost point motors of the prior art.In the prior art on the conventional stator winding connection mode in Fig. 2, show and be perfectly clear, become a parallel branch between the three-phase.Such structure exists a problem, promptly because the factor of parts machining accuracy and assembly precision exists, the eccentric phenomenon of armature spindle and stator inner hole will certainly occur.When supposing armature spindle downward bias to occur after motor assembles; If winding flows through certain electric current, because winding A1 magnetic flux need pass through bigger air gap, will be so produce every utmost point magnetic flux less than the magnetic flux that produces by winding A3 by winding A1; That is to say that the inductance of winding A1 is less than winding A3.If every phase winding series connection; As shown in Figure 2, winding A1, winding A2; Winding A3 is with winding A4 series connection and flow through identical electric current; Then the magnetic flux of winding A1 generation must be less than the magnetic flux of winding A3 generation, and the magnetic flux imbalance causes the Reeb of unbalanced magnetic pull and low number of times, thereby produces vibration and noise.People hope to rely on adjustment product precision to reduce the eccentric problem of being brought in the prior art; But in fact because the certainly existing of error; Be difficult to fundamentally address this problem; Improve the production precision simultaneously and also caused the raising of cost, so we need solve this problem from the improvement of technology.
Summary of the invention
The purpose of this invention is to provide a kind of eccentric stator that causes noise and vibration that reduces, cost is low, and can effectively reduce because the vibrating noise that the rotor eccentricity of being installed in the stator causes.
For reaching said effect; A kind of stator that reduces noise and vibration that off-centre causes of the present invention comprises the three-phase branch road that is connected in parallel, and is equipped with at least two group windings on the branch road of said every road; Every group of winding institute is identical around the number of turn, the winding connection parallel with one another on the branch road of every road.
Preferably, on the said single branch road between the adjacent winding institute's spacing distance identical.Such structure is convenient to the die sinking of stator, also is convenient to the maintenance of later stage for stator.Can find fast in case break down is to go wrong on which winding.
Preferably, winding quantity is any even number value on the said single branch road.
Through described structure, parallelly connected a plurality of windings on the single branch road of stator.When work; In case rotor takes place eccentric, the reactance pressure drop of a plurality of windings on the then single branch road increases successively, so the electric current that is flow through in each winding reduces successively; Flow through bigger electric current in first winding; Can compensate the imbalance of magnetic flux distribution to a certain extent, thereby reduce unbalanced magnetic pull and low frequency electromagnetic noise, reach the effect of noise control and vibration damping.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is the sketch map of prior art threephase asynchronous machine stator.
Fig. 2 is the overall schematic with a parallel branch of prior art threephase asynchronous machine stator.
Fig. 3 is the eccentric overall schematic that causes the stator of noise and vibration for the present invention reduces.
Embodiment
A kind of stator that reduces noise and vibration that off-centre causes comprises the three-phase branch road 1 that is connected in parallel, and is equipped with at least two group windings on said every road branch road 1, and every group of winding institute is identical around the number of turn, the winding connection parallel with one another on every road branch road 1.On the said single branch road 1 between the adjacent winding institute's spacing distance identical.
As shown in Figure 3, be the structure of three-phase 4 utmost point motor stators, therefore be equipped with 4 groups of windings on every road branch road 1.Winding with on the every road branch road wherein all is connected in parallel, i.e. winding A1, and A2, A3, A4 are connected in parallel together, winding B1, B2, B3, B4 are connected in parallel together, winding C1, C2, C3, C4 is connected in parallel together.
When work, if off-centre does not take place in rotor, the motor operate as normal.In case and off-centre takes place rotor, stator of the prior art is an example like Fig. 2; If winding flows through certain electric current, because winding A1 magnetic flux need pass through bigger air gap, so will be less than the magnetic flux that produces by A3 by the magnetic flux of winding A1 generation; That is to say that the inductance of A1 is less than A3.Under the situation of windings in series, winding A1, A2; A3 is with the A4 series connection and flow through identical electric current; Then the magnetic flux of winding A1 generation must be less than the magnetic flux of winding A3 generation, and the magnetic flux imbalance causes the Reeb of unbalanced magnetic pull and low number of times, thereby produces vibration and noise.
And during a kind of situation that reduces the eccentric stator generation rotor eccentricity that causes noise and vibration of the present invention; Because of the reactance pressure drop of unitary current among the winding A1 less than winding A3; So the electric current that winding A1 flows through must be greater than winding A3; Flow through the imbalance that bigger electric current compensates magnetic flux distribution to a certain extent among the winding A1, thereby reduced unbalanced magnetic pull and low frequency electromagnetic noise.And off-centre is big more, and the effect that vibrating noise reduces is obvious more.But the off-centre here belongs to the off-centre in normal range (NR), if it is overheated to cause rubbing because rotor eccentricity surpasses certain limit, burns whole motor easily.
To sum up, though just list an embodiment who has lifted three-phase 4 utmost point motor stators, according to experiment, three phase electric machine is all can adopt structure of the present invention under the situation of any even number value in winding quantity on the single branch road 1.Because principle is identical, therefore no longer tired stating.
Claims (3)
1. one kind is reduced the eccentric stator that causes noise and vibration; Comprise the three-phase branch road (1) that is connected in parallel, it is characterized in that, be equipped with at least two group windings on said every road branch road (1); Every group of winding institute is identical around the number of turn, the winding connection parallel with one another on every road branch road (1).
2. a kind of eccentric stator that causes noise and vibration that reduces as claimed in claim 1, it is characterized in that: institute's spacing distance is identical between the last adjacent winding of said single branch road (1).
3. a kind of eccentric stator that causes noise and vibration that reduces as claimed in claim 1, it is characterized in that: it is any even number value that said single branch road (1) is gone up winding quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104138568A CN102394522A (en) | 2011-12-13 | 2011-12-13 | Stator capable of reducing vibration and noise caused by eccentricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104138568A CN102394522A (en) | 2011-12-13 | 2011-12-13 | Stator capable of reducing vibration and noise caused by eccentricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102394522A true CN102394522A (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104138568A Pending CN102394522A (en) | 2011-12-13 | 2011-12-13 | Stator capable of reducing vibration and noise caused by eccentricity |
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| CN (1) | CN102394522A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362396A (en) * | 2021-12-29 | 2022-04-15 | 大连船用推进器有限公司 | High-efficiency low-vibration low-noise copper rotor motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163502A (en) * | 1997-02-05 | 1997-10-29 | 福州大学 | high effect three-phase capacitive motor |
| CN2452199Y (en) * | 2000-11-16 | 2001-10-03 | 沈阳工业大学 | Large low-speed torque permasyn motor |
| CN1728507A (en) * | 2004-07-30 | 2006-02-01 | 株式会社一宫电机 | Stator and brushless motor |
| JP2006271018A (en) * | 2005-03-22 | 2006-10-05 | Matsushita Electric Ind Co Ltd | Method of driving three-phase synchronous motor |
| CN202334057U (en) * | 2011-12-13 | 2012-07-11 | 许晓华 | Stator reducing vibration and noises caused by eccentricity |
-
2011
- 2011-12-13 CN CN2011104138568A patent/CN102394522A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163502A (en) * | 1997-02-05 | 1997-10-29 | 福州大学 | high effect three-phase capacitive motor |
| CN2452199Y (en) * | 2000-11-16 | 2001-10-03 | 沈阳工业大学 | Large low-speed torque permasyn motor |
| CN1728507A (en) * | 2004-07-30 | 2006-02-01 | 株式会社一宫电机 | Stator and brushless motor |
| JP2006271018A (en) * | 2005-03-22 | 2006-10-05 | Matsushita Electric Ind Co Ltd | Method of driving three-phase synchronous motor |
| CN202334057U (en) * | 2011-12-13 | 2012-07-11 | 许晓华 | Stator reducing vibration and noises caused by eccentricity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362396A (en) * | 2021-12-29 | 2022-04-15 | 大连船用推进器有限公司 | High-efficiency low-vibration low-noise copper rotor motor |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |