CN106783167A - A kind of power capacitor with denoising device - Google Patents
A kind of power capacitor with denoising device Download PDFInfo
- Publication number
- CN106783167A CN106783167A CN201611218360.4A CN201611218360A CN106783167A CN 106783167 A CN106783167 A CN 106783167A CN 201611218360 A CN201611218360 A CN 201611218360A CN 106783167 A CN106783167 A CN 106783167A
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- capacitor
- damping
- equivalent
- damping material
- high density
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- 239000003990 capacitor Substances 0.000 title claims abstract description 75
- 238000013016 damping Methods 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 239000011358 absorbing material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 102100032884 Neutral amino acid transporter A Human genes 0.000 description 1
- 101710160582 Neutral amino acid transporter A Proteins 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/35—Feed-through capacitors or anti-noise capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a kind of power capacitor with denoising device, metal shell cover is tightly connected with capacitor casing, damping material is filled with metal shell cover, high density granular and/or bubble are filled with damping material, adjust the change of the equivalent elastic coefficient k and Equivalent damping coefficient C of the quality m and density and damping material of high density granular, the frequency of denoising device is controlled, with the main noise of absorption capacitor；The present invention is greatly lowered than conventional capacitor noise radiation amount, and the installation cost is low, process is simple, it is readily produced and manufactures, radiating influence on power capacitor is minimum and does not influence its stability, can be on the premise of power capacitor safe operation be ensured, noise is reduced, and facilitates installation and repairing.
Description
【Technical field】
The present invention relates to power capacitor field, more particularly to a kind of power capacitor with denoising device.
【Background technology】
As super-pressure, extra-high voltage direct-current transmission engineering are more and more, exist in super-pressure, extra-high voltage DC transmission system
In AC and DC conversion process, a large amount of harmonic waves are produced.Harmonic current is by exchanging in parallel, filter condenser and DC filter capacitor
During device, medium receives the effect of alternating electric field power and produces vibration in capacitor unit, causes capacitor unit case surface to be vibrated,
Air close to capacitor unit case surface vibrates generation sound therewith.And in super-pressure, extra-high voltage electric power system, it is this kind of
The characteristics of in parallel, filter capacitor device has big capacity, big floor space and pylon high, under certain condition, all electric capacity
The audible noise more than 60dB is up to after the noise synthesis of device unit, the production, life to surrounding resident have a negative impact.
At present, the reduction noise scenarios major part of power capacitor is internally noise reduction, and this noise reduction is not very bright
It is aobvious, and bring difficulty to production and maintenance.
【The content of the invention】
The present invention provides a kind of power capacitor with denoising device, can ensure power capacitor safe operation
Under the premise of, noise is reduced, and facilitate installation and repairing.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of power capacitor with denoising device, including capacitor casing and the gold installed in capacitor casing bottom
Category jacket, metal shell cover is tightly connected with capacitor casing, and damping material is filled with metal shell cover, and damping material is
Elastomeric material and wherein be filled with high density granular and/or bubble, adjust high density granular quality m and density and damping material
The change of the equivalent elastic coefficient k and Equivalent damping coefficient C of material, controls the frequency of denoising device, with the main of absorption capacitor
Noise.
Further, the shake of the quality m of high density granular, damping material equivalent elastic coefficient k and Equivalent damping coefficient C compositions
Dynamic system, meets relationship below：
Wherein：K is the equivalent elastic coefficient of damping material, and C is the Equivalent damping coefficient of damping material, and m is high density
The equivalent mass of grain, k1、C1And m1The respectively equivalent stiffness of capacitor case vibration plane, Equivalent damping coefficient and equivalent
Quality；
In formula,
It is the second dervative of damping system vibration displacement
It is the first derivative of damping system vibration displacement
X is damping system vibration displacement
F is vibration force
It is the second dervative of case vibration displacement
It is the first derivative of case vibration displacement
x1It is case vibration displacement
By adjusting the equivalent mass m of the high density granular and equivalent elastic coefficient k of damping material, reduce capacitor case
Vibration, by vibrational energy consumption in C is damped.
Further, cavity is formed between the metal shell cover and damping material, sound-absorbing material is installed in the cavities
Or it is pasted with damping material in metal shell cover bottom inside.
Further, the high density granular quality is 0.1g~100g.
Further, damping material has out-of-flatness surface.
Further, the metal shell cover inner surface is coated with sound-absorbing material.
Further, metal shell cover is provided with sealing rubber pad with capacitor casing junction.
The power capacitor that the present invention has denoising device includes capacitor casing and is sealingly mounted at capacitor casing bottom
Metal shell cover, metal shell cover is tightly connected with capacitor casing, and damping material is filled with metal shell cover, damps material
High density granular and/or bubble are filled with material, the quality m of high density granular and the Equivalent Elasticity of density and damping material is adjusted
The change of coefficient k and Equivalent damping coefficient C, controls the frequency of denoising device, with the main noise of absorption capacitor；Present invention ratio
Conventional capacitor noise radiation amount is greatly lowered, and the installation cost is low, process is simple, it is easy to production and manufacture, to electric power
The radiating influence of capacitor is minimum and does not influence its stability, can be on the premise of power capacitor safe operation is ensured, drop
Low noise, and facilitate installation and repairing.
Further, cavity is formed between metal shell cover and organic damping material, sound-absorbing cavity can add sound-absorbing material more
Effective absorption of noise, can reduce the noise of power capacitor, and do not influence the radiating of power capacitor, and maintenance side
Just.
Further, described organic damping material has not flat surface, can control frequency, the main frequency range of absorption capacitor
Sound.
【Brief description of the drawings】
Fig. 1 is the power capacitor structural representation with denoising device；
Fig. 2 is organic damping material schematic diagram, wherein (a) is full packing high density granular schematic diagram, (b) is filling high density
Degree particle and bubble combination diagram；
Fig. 3 capacitor case vibration amplitude amplification factor curve maps；
The noise reduction system isoboles that Fig. 4 damping materials are constituted with high density granular；
Fig. 5 show the equivalent model after considering case vibration；
Fig. 6 noise reduction figures；
In figure：Capacitor casing 1；Bubble 2；High density granular 3；Out-of-flatness surface 4；Cavity 5；Metal shell cover 6；Sealing
Rubber blanket 7；Spring mass block 8.
【Specific embodiment】
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as to limit of the invention
It is fixed.
Shown in reference picture 1, the power capacitor of denoising device of the present invention installs a kind of in the bottom of power capacitor casing 1
Shielding device for audio, the setting position is made up of two parts, i.e. damping material and metal shell cover 6.Reference picture 2, Fig. 2 (a) is
Full packing high density granular schematic diagram；Fig. 2 (b) is filling high density degree particle and bubble combination diagram；Filled in damping material
High density granular 3 or bubble 2 or both have；Cavity 5 is formed between damping material and metal shell cover, cavity can be provided with
Sound-absorbing material or cavity 5 is inner can fill damping material, and the inner surface of metal shell cover 6 can smear sound-absorbing material, and by its
Fixed potential 8 is sealed with capacitor casing, the noise for being so conducive to more preferable absorption capacitor to produce.
The mass of high density granular 3 adjusts quality and density and organic damping of high density granular between 0.1g~100g
The change of the elastic modelling quantity k and damped coefficient c of material, control denoising device frequency, with adapt to capacitor main noise frequently
The absorption of rate.
Further improvement and feature of the invention are：
Described organic damping material is contained within high density granular or bubble, or both have；
Described organic damping material has not flat surface 4, can control frequency, the main frequency range sound of absorption capacitor；
Described metal shell cover fixed potential is tightly connected with capacitor casing；
High density granular can adjust the elasticity of its quality and density and the organic damping material of adjustment according to condenser current
Modulus k and damped coefficient C reach more preferable noise reduction；
Described smears sound-absorbing material in metal shell cover inner surface.
Noise reduction general principle：
Capacitor noise is vibrated by capacitor case and produced, and case vibration occurs mainly in top and bottom.The present invention is only
Only illustrate in bottom installation situation, top is installed similar with bottom installation.
Capacitor noise is limited Frequency point for frequency.Under normal circumstances, the frequency for playing Main Function is 2~4
Frequency point.
Such as single tuned filter, major harmonic is the tuned frequency f0 of filter branch, then corresponding frequency noise can
Calculated with using formula (1)：
Fsound=f0 ± 50 (1)
If capacitor is double tunning branch road f0, f1, the main frequency point of noise can be counted using formula (2) and formula (3)
Calculate：
Fsound1=f0 ± 50 (2),
Fsound2=f1 ± 50 (3)
Although remaining component is in the presence of these components are not topmost frequency noises.Capacitor noise treatment it is good this
Several fundamental components can reach preferable noise reduction.
As shown in figure 1, noise reduction result is divided into 8 parts constituting.
Vibration main frequency can be calculated according to different capacitor application situations using formula (1)~formula (3).Then
Choose one or two fundamental component.
The effect of bubble 2 mainly increases the catadioptric of sound wave transmission in damping material, increases SATT.
The high density granular 3 added in damping material and the system of damping material composition spring mass block 8, for absorbing spy
Determine the vibration of frequency.
Damping material surface carries out roughening treatment, is out-of-flatness surface, i.e., surface sets rough surface increases folding
Reflective surface area.Further consume noise energy.
The inside of cavity 5 is for filling sound-absorbing material.
Metal shell cover 6 is used for the anti-water segregation of internal material, and plays deadening.Inner surface of outer cover can be brushed
Or paste damping paint or attract cotton felt.
Sealing rubber pad 7 is sealed for internal material and avoids metal shell cover 6 and the direct rigid contact of capacitor case.
Damping material and the internal system of high density granular composition spring mass block 8, for eliminating shaking for internal CF
It is dynamic.
As shown in figure 4, the noise reduction system isoboles of spring mass block 8.Wherein k is the Equivalent Elasticity system of a damping material
Number, C is the Equivalent damping coefficient of damping material, and m is the equivalent mass of high density granular.By damping material and high density granular 3
The system of composition is arranged on capacitor vibration shell.
Fig. 5 show the equivalent model after considering case vibration.Wherein, mass centre is that the capacitor assumed a certain is not sent out
The fixed position of raw vibration；k1、C1And m1Respectively the equivalent stiffness of capacitor case vibration plane, Equivalent damping coefficient and
Equivalent quality.
When without composite damping system is increased, capacitor case is equivalent to k1、C1And m1The main system of composition, system
Vibration equation meets formula (4).
In formula,
It is the second dervative of damping system vibration displacement
It is the first derivative of damping system vibration displacement
X is damping system vibration displacement
F is vibration force
After composite damping system is increased, k, C, m composition dynamic absorber, system equation is shown in formula (5)：
In formula：
It is the second dervative of case vibration displacement,
It is the first derivative of case vibration displacement,
x1It is case vibration displacement,
F vibration forces,
Formula (6) can be expressed as the vibration amplitude amplification factor of capacitor case
Wherein：μ is mass ratio, and γ is natural frequency ratio, and ξ is damping ratio, | A1| it is amplitude；XstFor extraneous exciting force causes
Quiet deformation
Fig. 3 capacitor case vibration amplitude amplification factor curve maps
Capacitor case vibration can be reduced, by vibrational energy by the equivalent mass m of high density granular and parameter k
Consumption is in C is damped.
Fig. 6 noise reduction figures, wherein：To increase noise reduction, circle is baseline results to five-pointed star, and noise reduction is obvious.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific embodiment of the invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (7)
1. a kind of power capacitor with denoising device, it is characterised in that：Including capacitor casing (1) and installed in capacitor
The metal shell cover (6) of housing (1) bottom, metal shell cover (6) is tightly connected with capacitor casing, in metal shell cover (6)
Filled with damping material, damping material is elastomeric material and is wherein filled with high density granular (3) and/or bubble (2), regulation
The change of the quality m and density of high density granular and the equivalent elastic coefficient k of damping material and Equivalent damping coefficient C, control drop
Make an uproar the frequency of device, with the main noise of absorption capacitor.
2. a kind of power capacitor with denoising device as claimed in claim 1, it is characterised in that：The matter of high density granular
The vibroseis of amount m, damping material equivalent elastic coefficient k and Equivalent damping coefficient C compositions, meets relationship below：
Wherein：K is the equivalent elastic coefficient of damping material, and C is the Equivalent damping coefficient of damping material, and m is high density granular
Equivalent mass, k1、C1And m1The respectively equivalent stiffness of capacitor case vibration plane, Equivalent damping coefficient and equivalent mass；
In formula；It is the second dervative of damping system vibration displacement,It is the first derivative of damping system vibration displacement, x is damping
System vibration displacement, F is vibration force,It is the second dervative of case vibration displacement,It is the first derivative of case vibration displacement,
x1It is case vibration displacement；
By adjusting the equivalent mass m of the high density granular and equivalent elastic coefficient k of damping material, reduce capacitor case and shake
It is dynamic, by vibrational energy consumption in C is damped.
3. a kind of power capacitor with denoising device as claimed in claim 1 or 2, it is characterised in that：Outside the metal
Clamshell (6) is formed with cavity (5) and damping material between, sound-absorbing material is provided with cavity (5) or in metal shell cover (6)
Bottom inside is pasted with damping material.
4. a kind of power capacitor with denoising device as claimed in claim 3, it is characterised in that：The high density granular
(3) quality is 0.1g~100g.
5. a kind of power capacitor with denoising device as claimed in claim 3, it is characterised in that：Damping material has not
Flat surface (4).
6. a kind of power capacitor with denoising device as claimed in claim 3, it is characterised in that：The metal shell cover
(6) inner surface is coated with sound-absorbing material.
7. a kind of power capacitor with denoising device as claimed in claim 3, it is characterised in that：Metal shell cover (6)
Capacitor casing junction is provided with sealing rubber pad (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218360.4A CN106783167B (en) | 2016-12-26 | 2016-12-26 | A kind of power capacitor with denoising device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218360.4A CN106783167B (en) | 2016-12-26 | 2016-12-26 | A kind of power capacitor with denoising device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783167A true CN106783167A (en) | 2017-05-31 |
| CN106783167B CN106783167B (en) | 2018-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611218360.4A Active CN106783167B (en) | 2016-12-26 | 2016-12-26 | A kind of power capacitor with denoising device |
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| Country | Link |
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| CN (1) | CN106783167B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109671562A (en) * | 2018-12-11 | 2019-04-23 | 深圳市法拉第电驱动有限公司 | Denoising structure, bus capacitor and the electric car of bus capacitor |
| CN110581020A (en) * | 2019-10-15 | 2019-12-17 | 西安交通大学 | Capacitor and method for determining rigidity of rigidity resonance element |
| CN112943832A (en) * | 2021-04-09 | 2021-06-11 | 厦门振为科技有限公司 | Low-noise capacitor |
-
2016
- 2016-12-26 CN CN201611218360.4A patent/CN106783167B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109671562A (en) * | 2018-12-11 | 2019-04-23 | 深圳市法拉第电驱动有限公司 | Denoising structure, bus capacitor and the electric car of bus capacitor |
| CN110581020A (en) * | 2019-10-15 | 2019-12-17 | 西安交通大学 | Capacitor and method for determining rigidity of rigidity resonance element |
| CN112943832A (en) * | 2021-04-09 | 2021-06-11 | 厦门振为科技有限公司 | Low-noise capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106783167B (en) | 2018-11-16 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210730 Address after: No.10 Taoyuan Road, Lianhu District, Xi'an City, Shaanxi Province Patentee after: XI'AN XD POWER CAPACITOR Co.,Ltd. Patentee after: CHINA XD ELECTRIC Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an province high tech Zone No. 7 Tang Xing Lu Patentee before: CHINA XD ELECTRIC Co.,Ltd. |
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