CN102400917A - Method for reducing vibrations and noises of seal type permanent magnet compressor - Google Patents
Method for reducing vibrations and noises of seal type permanent magnet compressor Download PDFInfo
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- CN102400917A CN102400917A CN2011103429890A CN201110342989A CN102400917A CN 102400917 A CN102400917 A CN 102400917A CN 2011103429890 A CN2011103429890 A CN 2011103429890A CN 201110342989 A CN201110342989 A CN 201110342989A CN 102400917 A CN102400917 A CN 102400917A
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Abstract
The invention discloses a method for reducing vibrations and noises of a seal type permanent magnet compressor. The method comprises the steps of: acquiring rotor position information, and performing periodic load compensation on a difference value between the rotor position information and a standard position. According to the method for reducing the vibrations and noises of the seal type permanent magnet compressor, by overlaying a periodic torque modulation function on an original modulation coefficient of the permanent magnet compressor and counteracting a modulation coefficient obtained by using the function on the compressor as well as controlling electric torque to make the periodic acceleration/deceleration of a motor rotor tend to be zero acceleration so as to finally make the periodic acceleration of the motor rotor tend to be zero, the torque action between a mounting base and the compressor is made to tend to be zero, and thus, a vibration source and a noise source are reduced from sources.
Description
Technical field
The invention discloses a kind of method that reduces closed permanent magnetism compressor vibrations and noise, belong to industrial noise control field.
Background technique
The permanent magnetism compressor is a kind of equipment common in industry, and the mass distribution of moving element mainly concentrates on the rotor, for whole compressor, does not have mechanical torque output.Process circulation air-breathing and compression hockets in compressor inside; Under conventional VFC; The rotor of compressor also is corresponding acceleration and moderating process circulation; This periodicity of rotor is quickened and slows down the torsional interaction of alternation can take place between compressor fitting seat and compressor, thereby produces vibrations and noise.
Because the permanent magnetism compressor is a kind of industry equipment of extensive use, its noise and vibration problems have caused very big harmful effect to environment.Related domain is being inquired into to improve with which kind of rational structure always and is being reduced its vibrations and noise for a long time.Past research over several years mainly concentrates on through in compressor, adding noise eliminating parts or sound barrier sheet or damping module or the position of compressor rotor being moved to reduce its vibrations and noise; Although this kind architecture advances has alleviated the noise and the vibrations of compressor to a certain extent; But it should be noted that on the other hand this architecture advances has obviously increased the complexity on the compressor arrangement; Owing to added unnecessary assembly in the compressor, its manufacture cost and maintenance cost all obviously rise.This type of architecture advances can only be applied to the permanent magnetism compressor of new production simultaneously, can't use for existing old-fashioned compressor.
For these reasons, a kind of method that can on the permanent magnetism compressor foundation on existing basis, reduce its noise and vibrations is badly in need of in related domain.
Summary of the invention
The invention discloses a kind of method that reduces closed permanent magnetism compressor vibrations and noise,,, reduced vibrations and noise through improvement to permanent magnetism compressor drum operation control method to the deficiency of existing technology.
For realizing above-mentioned purpose, the present invention realizes through following technical proposals:
Comprise the step of obtaining rotor position information and the difference of rotor position information and normal place being given the cyclic loading compensation; Realization on the concrete engineering comprises following three steps: obtain the rotor position information in the permanent magnetism compressor 1.; And gained information compared with normal place get difference Xn, n=1,2; 3 ...; 2. set up array Yn, n=1,2,3 according to the resulting rotor position information of the step 1 gained difference Xn that compares with normal place as variable .... so that difference Xn is carried out cycle and regeneration of mature; 3. array Yn is carried out computing, generate a temporal continuous function Ft, this function is acted on the former index of modulation F0, the extremely last pressure regulation waveform that forms one-period property index of modulation F=Ft*F0 acts on compressor.
In said method, there is multiple mode can obtain the position information of rotor, include but not limited to following several method: 1. motor directly provides rotor position information; 2. the time point indirect calculation of the Zero Crossing Point through current of electric goes out the position information of rotor; Induced voltage zero-crossing timing point indirect calculation during 3. through non-driven state on the stator coil goes out the position information of rotor; Perhaps obtain the position information etc. of rotor through other external means or counter etc., the present invention does not limit the method that obtains rotor position information, and the working control device according to circumstances uses one or more method wherein all can.
In the method for the invention; Normal place defines through following technological concept: the driving of magneto all needs the position information of direct or indirect detection rotor; 6 positional cycles (6 primary current Zero Crossing Points or 6 induction electromotive force Zero Crossing Points) are arranged in an electric cycle usually: for two-pole machine, motor 6 the position probing information that rotated a circle; As far as 4 utmost point motors, motor 12 the position probing information that rotated a circle; By that analogy.When the motor uniform rotation, these 6 or 12 position informations spatially are on 6 or 12 position of halving of a week (360 degree), are called normal place.When in the present invention, the difference Xn of step 1 is difference and the hysterisis criterion position of rotor position information and normal place for just.Yet those skilled in the art are understanding on the basis of connotation of the present invention; It also is feasible adopting other mode to handle Xn numerical value; For example count etc. with the poor absolute value of rotor position information and normal place; This is that those skilled in the art are understandable according to the present invention, belongs to protection scope of the present invention.
In the method for the invention, step 2 is used to set up moment of torsion periodic modulation data array Yn, and the value of each variable is through step 1 location information data Xn is handled and obtains in this array, can come the value of cycle and regeneration of mature Yn according to the variation of Xn.
On the basis of the above, for fear of the interference to the former index of modulation of compressor, the maximum value among the qualification Yn is constant to be 1; In order to guarantee the stability of system, prevent moment of torsion concussion, and the workload-adaptability of retentive control mode, three kinds of modes are only taked in the change of Yn :+Δ ,+0 ,-Δ, wherein, Δ is the number much smaller than 1, for example 0.05.Δ is to define value as required voluntarily here, as long as it keeps constant in Yn array procurement process.
In step 3, the concrete form of continuous function Ft does not receive special restriction, can obtain a continuous curve through the match of the value of Yn being carried out multiple mode; Preferably, handle step in order to simplify this, improve the working efficiency of the inventive method, the continuous function Ft of step 3 obtains with the curve that straight line couples together through the value of adjacent Yn.
After obtaining continuous function Ft, this function is acted on the existing former index of modulation F0 of permanent magnetism compressor, act on compressor to the last pressure regulation waveform that forms one-period property index of modulation F=Ft*F0 and get final product.
Through processing method of the present invention, the electric moment of torsion of compressor drum and resisting moment be at any time all near balance, and rotor is near the uniform rotation state, thereby significantly reduced its vibrations and noise.
Method of the present invention goes for the permanent magnetism compressor of any kind, and mainly include but not limited to following several types: closed frequency conversion permanent magnet compressor, moving-mass mainly are distributed in epitrochanterian compressor, load variations compressor slowly.Wherein closed frequency conversion permanent magnet compressor such as refrigerator air cooling compressor, industrial air refrigerator etc.; Moving-mass mainly is distributed in epitrochanterian compressor and comprises rotor compressor, such as Wankel-type compressor, two-spool compressor, compressor with rolling rotor etc.; Load variations compressor slowly is mainly air condition compressor.
The method of closed permanent magnetism compressor vibrations of reduction disclosed by the invention and noise; Improvement through to the compressor drum operation control method has reduced its noise and vibrations on the basis that need not revise the permanent magnetism compressor arrangement, have cost advantage low, simple in structure, that extensively be suitable for.
Description of drawings
Fig. 1 is the not torque condition figure during life cycle torque compensation function of existing compressor.
Fig. 2 is existing compressor operation figure;
Fig. 3 is method Ft continuous function figure of the present invention;
Fig. 4 is the moment of torsion running state figure that has used method life cycle torque compensation of the present invention;
Fig. 5 is the compressor operation figure that has used method of the present invention.
Embodiment
In order to be illustrated more clearly in the working procedure of the inventive method, the claimant combines concrete permanent magnetism type of compressor and accompanying drawing that method of the present invention is explained.Those skilled in the art should know that this embodiment does not constitute qualification to the present invention, and the permanent magnetism compressor that those skilled in the art are applied to other types on this basis also can solve noise and vibration problems, still belongs to protection scope of the present invention.
With reference to figure 1,2, existing permanent magnetism compressor, the mass distribution of moving element mainly concentrates on the rotor, and does not have mechanical torque output (as far as whole compressor).The process circulation air-breathing and compression owing to hocket in compressor inside (can be considered basicly stable electric moment of torsion) under conventional VFC, the rotor of compressor also is corresponding acceleration and moderating process circulation.Can know that by law of conservation of angular momentum this periodicity of rotor is quickened and slow down the torsional interaction of alternation can take place, thereby produces vibrations and noise between compressor fitting seat and compressor.
Be example with 4 utmost point motor compressor below, the process and the step of the inventive method be described:
1. as far as 4 utmost point motors, motor rotated a circle 12 position probing information n1, n2, n3 ... N11, n12 when the motor uniform rotation, are on these 12 position information spaces on 12 position of halving of a week (360 degree), are called normal place.Definition: X1, X2, X3 ... When X11, X12 value are difference and the hysterisis criterion position of position probing value and normal place for just.Below describe and use four utmost point motors as example, other number of poles motor is analogized.
2, set up moment of torsion periodic modulation data array:
Set up data array Y1, Y2, a Y3 who forms by 12 variablees ... Y11, Y12; Through location information data X1, X2, X3 ... The processing of X11, X12; Come cycle and regeneration of mature Y1, Y2, Y3 ... The value of Y11, Y12, this class value periodicity final and load torque has substantial connection.Wherein, Y1, Y2, Y3 ... A value of the middle maximum of Y11, Y12 is 1 forever, thereby avoids the interference to the former index of modulation; Consider the stability of system, prevent the workload-adaptability of moment of torsion concussion and control mode, three kinds of modes are only taked in the change of Yn :+Δ ,+0 ,-Δ, wherein, Δ is the number much smaller than 1, for example 0.05; Y1, Y2, Y3 ... The change rule of Y11, Y12 value: after up-to-date rotor-position is detected (for example X8), judge according to the value of X8-X7 and the value of X7-X6, when
(X7-X6)＞0}and{ (X8-X7)＞0} then Y7 increase Δ;
(X7-X6)＜0}and{ (X8-X7)＜0} then Y7 reduce Δ;
Other situation Y7 remains unchanged.
When the Y7 value greater than 1 the time, the Y7 value resets to 1.
All the other Yn by that analogy
3, pass through data Y1, Y2, Y3 ... The computing of Y11, Y12 generates a temporal continuous function Ft,, this function acts on the former index of modulation (being expressed as F0).The pressure regulation waveform that forms one-period property index of modulation F=Ft*F0 at last acts on compressor.Wherein function F t is as shown in Figure 3, the curve that adjacent Yn value is coupled together with straight line.
As shown in Figure 4; The lines implication is corresponding with Fig. 1 among the figure; Shown and adopted method of the present invention to act on permanent magnetism compressor life cycle torque compensation and the postrun torque condition figure of process later on; Can find out electric moment of torsion and resisting moment at any time all near balance, rotor is near the uniform rotation state, thereby reduced noise and vibrations.
As shown in Figure 5, shown method of the present invention is how to act on compressor, and method of the present invention acts on compressor and formed the cyclic loading compensation, thereby has reduced noise and vibrations.
Claims (8)
1. method that reduces closed permanent magnetism compressor vibrations and noise comprises and obtains rotor position information and give the step that cyclic loading compensates to the difference of rotor position information and normal place
2. the method for vibrations of the closed permanent magnetism compressor of reduction according to claim 1 and noise comprises following three steps: 1. obtain the rotor position information of permanent magnetism compressor variable frequency in controlling, and the gained position information compared with normal place get difference Xn; N=1; 2,3 ...; 2. set up array Yn, n=1,2,3 according to the resulting rotor position information of the step 1 gained difference Xn that compares with normal place as variable 3. array Yn is carried out computing, generate a temporal continuous function Ft, this function is acted on the former index of modulation F0, the extremely last pressure regulation waveform that forms one-period property index of modulation F=Ft*F0 acts on compressor.
3. the method for vibrations of the closed permanent magnetism compressor of reduction according to claim 2 and noise, when the difference Xn that it is characterized in that said step 1 is difference and the hysterisis criterion position of rotor position information and normal place for just.
4. the method for closed permanent magnetism compressor vibrations of reduction according to claim 1 and 2 and noise, thus it is characterized in that directly providing rotor position information through motor obtains rotor position information; Or the time point indirect calculation of the Zero Crossing Point through the compressor electric motor electric current goes out the position information of rotor; Or the induced voltage zero-crossing timing point indirect calculation on the stator coil goes out the position information of rotor during through non-driven state.
5. the method for vibrations of the closed permanent magnetism compressor of reduction according to claim 2 and noise, the curve acquisition that the value of the continuous function Ft that it is characterized in that step 3 through adjacent Yn couples together with straight line.
6. the method for closed permanent magnetism compressor vibrations of reduction according to claim 1 and noise is characterized in that said permanent magnetism compressor comprises that closed frequency conversion permanent magnet compressor, moving-mass mainly are distributed in epitrochanterian compressor, load variations compressor slowly.
7. the method for closed permanent magnetism compressor vibrations of reduction according to claim 6 and noise is characterized in that it is rotor compressor that said moving-mass mainly is distributed in epitrochanterian compressor.
8. the method for vibrations of the closed permanent magnetism compressor of reduction according to claim 6 and noise, it is characterized in that said load variations slowly compressor be air condition compressor.
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| CN201110342989.0A CN102400917B (en) | 2011-11-03 | 2011-11-03 | Method for reducing vibrations and noises of seal type permanent magnet compressor |
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| CN201110342989.0A CN102400917B (en) | 2011-11-03 | 2011-11-03 | Method for reducing vibrations and noises of seal type permanent magnet compressor |
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| CN102400917A true CN102400917A (en) | 2012-04-04 |
| CN102400917B CN102400917B (en) | 2014-05-21 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208109B1 (en) * | 1996-08-19 | 2001-03-27 | Hiroyuki Yamai | Synchronous motor driving method, compressor driving method, device for the methods, and brushless DC motor driving device |
| US20040056629A1 (en) * | 2000-11-09 | 2004-03-25 | Toshiyuki Maeda | Synchronous motor control method and device |
| CN1599232A (en) * | 2003-09-20 | 2005-03-23 | Lg电子株式会社 | Apparatus for compensating for speed error of motor |
| CN1756064A (en) * | 2004-09-27 | 2006-04-05 | 乐金电子(天津)电器有限公司 | Load torque control device and compensation process for synchronous reluctance motor |
| JP2006262643A (en) * | 2005-03-17 | 2006-09-28 | Hitachi Ltd | Controller for synchronous motor, and regulation method thereof |
| CN101001075A (en) * | 2006-01-11 | 2007-07-18 | 海尔集团公司 | Torque control device and method of DC variable frequency compressor |
| CN101509694A (en) * | 2009-03-16 | 2009-08-19 | 宁波德斯科电子科技有限公司 | DC frequency converting air-conditioner compressor intelligent controller and control method thereof |
-
2011
- 2011-11-03 CN CN201110342989.0A patent/CN102400917B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6208109B1 (en) * | 1996-08-19 | 2001-03-27 | Hiroyuki Yamai | Synchronous motor driving method, compressor driving method, device for the methods, and brushless DC motor driving device |
| US20040056629A1 (en) * | 2000-11-09 | 2004-03-25 | Toshiyuki Maeda | Synchronous motor control method and device |
| CN1599232A (en) * | 2003-09-20 | 2005-03-23 | Lg电子株式会社 | Apparatus for compensating for speed error of motor |
| CN1756064A (en) * | 2004-09-27 | 2006-04-05 | 乐金电子(天津)电器有限公司 | Load torque control device and compensation process for synchronous reluctance motor |
| JP2006262643A (en) * | 2005-03-17 | 2006-09-28 | Hitachi Ltd | Controller for synchronous motor, and regulation method thereof |
| CN101001075A (en) * | 2006-01-11 | 2007-07-18 | 海尔集团公司 | Torque control device and method of DC variable frequency compressor |
| CN101509694A (en) * | 2009-03-16 | 2009-08-19 | 宁波德斯科电子科技有限公司 | DC frequency converting air-conditioner compressor intelligent controller and control method thereof |
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