CN201341297Y - Installing structure of EMI filter board - Google Patents
Installing structure of EMI filter board Download PDFInfo
- Publication number
- CN201341297Y CN201341297Y CNU2008202350160U CN200820235016U CN201341297Y CN 201341297 Y CN201341297 Y CN 201341297Y CN U2008202350160 U CNU2008202350160 U CN U2008202350160U CN 200820235016 U CN200820235016 U CN 200820235016U CN 201341297 Y CN201341297 Y CN 201341297Y
- Authority
- CN
- China
- Prior art keywords
- filter band
- connecting portion
- emi filter
- mounting structure
- cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to an installing structure of an EMI filter board. The EMI filter board is connected with a machine case through a ground copper bar, the ground copper bar includes a slab-shaped machine case connecting portion, a filter board connecting portion and a middle portion, the machine case connecting portion is clingingly fixed on the internal wall of the machine case, the filter board connecting portion is clingingly fixed on the surface of the EMI filter board, and two ends of the middle portion are respectively connected with the machine case connecting portion and the filter board connecting portion. The installing structure connects the EMI filter board with the housing case through the ground copper bar, reduces contact resistance to the EMI filter board and the housing case, and leads the EMI filter board to more effectively absorb interfering signals produced by interference sources.
Description
Technical field
The utility model relates to a kind of mounting structure of EMI filter band.
Background technology
In a lot of electronic equipments (for example UPS etc.), all exist electromagnetic interference (Electro MagneticInterference, EMI).For solving above-mentioned electromagnetic interference, adopt electromagnetic interference that the EMI filter band produces integrated circuit and element usually by cabinet or the common reference ground interference source that refluxes back.
As shown in Figure 1, be the scheme of installation of present EMI filter band.Internal interference sources 12 in the casing 10 can be the pin of high-frequency signal line, integrated circuit, all kinds of connectors etc., and the EMI filter band 13 that is coupled to above-mentioned internal interference source 12 is received casing 10 by copper stud 17, perhaps receive pillar on the casing 10 by screw.And casing 10 ground connection, thereby casing 10 is as reference point over the ground jointly.
Because what EMI filter band 13 need filter is the harmonic wave of high frequency, and high-frequency harmonic can produce skin effect.EMI filter band 13 through copper studs 17 or casing 10 on during pillar ground connection because contact-making surface is little, will cause between impedance between EMI filter band 13 and the copper stud 17, casing 10 and the copper stud 17 impedance bigger.In addition, because the surface area of copper stud 17 or screw is little, the AC impedance of high frequency is bigger; Casing 10 all use steel, and steel resistivity is bigger for cost consideration; There is certain distance the ground wire junction on EMI filter band 13 and the casing 10, so also can cause impedance bigger.
When the interference signal of using between conduction measurement instrument 14 copper test double-screw bolts 17 and other phase lines 15 and the N line, owing to top reason, EMI filter band 13 impedance loops are bigger, and effect is bad, causes the conduction test result of UPS relatively poor.
The utility model content
The technical problems to be solved in the utility model is, the bigger problem of each several part impedance when installing at above-mentioned EMI filter band provides a kind of mounting structure of EMI filter band.
The technical scheme that its technical problem that solves the utility model adopts is: the mounting structure that a kind of EMI filter band is provided, described EMI filter band is connected to cabinet by the ground connection copper bar, described ground connection bronze medal comprises flat cabinet connecting portion, filter band connecting portion and pars intermedia, wherein the cabinet connecting portion is close to and is fixed on the cabinet inwall, the filter band connecting portion is close to the surface that is fixed on the EMI filter band, and the two ends of pars intermedia connect described cabinet connecting portion and filter band connecting portion respectively.
In the mounting structure of EMI filter band described in the utility model, described cabinet connecting portion and filter band connecting portion be arranged in parallel.
In the mounting structure of EMI filter band described in the utility model, described pars intermedia is perpendicular to described cabinet connecting portion and filter band connecting portion.
In the mounting structure of EMI filter band described in the utility model, described cabinet connecting portion, filter band connecting portion and pars intermedia are formed by same copper sheet bending.
In the mounting structure of EMI filter band described in the utility model, the area that described cabinet connecting portion contacts with the cabinet inwall is more than or equal to 2 square centimeters.
In the mounting structure of EMI filter band described in the utility model, the area that contacts on described filter band connecting portion and EMI filter band surface is more than or equal to 1 square centimeter.
In the mounting structure of EMI filter band described in the utility model, described ground connection copper bar is connected to ground wire.
In the mounting structure of EMI filter band described in the utility model, described EMI filter band is connected with the internal interference source by copper bar.
The mounting structure of EMI filter band of the present utility model has following beneficial effect: by the connection of ground connection copper bar the EMI filter band is connected to casing, reduced the contact impedance with EMI filter band and casing, made the EMI filter band can more effectively absorb the interference signal that interference source produces.In addition, by the ground connection bronze medal is connected to ground wire, can reduce because the crosstalk signal that electric current causes influences the conduction measurement instrument.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of the mounting structure of existing EMI filter band;
Fig. 2 is the schematic diagram of the mounting structure of EMI filter band of the present utility model;
Fig. 3 is the schematic diagram of the concrete mounting structure of ground connection copper bar among Fig. 2;
Fig. 4 is the simplified model schematic diagram of EMI filter band conduction test among Fig. 2.
Embodiment
As Fig. 2, shown in Figure 3, be the schematic diagram of the mounting structure of EMI filter band of the present utility model.EMI filter band 23 in the casing 20 is coupled to the internal interference source 22 in the casing, and wherein internal interference source 22 can be the pin of high-frequency signal line, integrated circuit, all kinds of connectors etc.
Above-mentioned ground connection bronze medal 27 comprises and is respectively flat cabinet connecting portion, filter band connecting portion and pars intermedia, wherein the cabinet connecting portion is close to the inwall that is fixed on cabinet 20, the filter band connecting portion is close to the lower surface that is fixed on EMI filter band 23, and the two ends of pars intermedia connect cabinet connecting portion and filter band connecting portion respectively.
When EMI filter band 23 was provided with in the mode parallel with the cabinet inwall, the cabinet connecting portion and the filter band connecting portion of ground connection copper bar 27 be arranged in parallel, and pars intermedia is then perpendicular to cabinet connecting portion and filter band connecting portion.Certainly, in actual use, can have difform ground connection copper bar according to the mounting structure setting of concrete EMI filter band 23, for example when EMI filter band during perpendicular to cabinet, can with pars intermedia can with cabinet connecting portion or filter band connecting portion in same plane, the cabinet connecting portion is then vertical with the filter band connecting portion.
The filter band connecting portion of above-mentioned ground connection copper bar 27 can fix by screw 31 and EMI filter band 23.
In order to reduce the contact impedance of 27 of cabinet 20 and ground connection copper bars, the area that the cabinet connecting portion contacts with cabinet 20 inwalls is more than or equal to 2 square centimeters; Similarly, in order to reduce the contact impedance of 27 of EMI filter band 23 and ground connection copper bars, the area that contacts on filter band connecting portion and EMI filter band 23 surfaces is more than or equal to 1 square centimeter.
In order to reduce the contact impedance between pars intermedia and cabinet connecting portion, the filter band connecting portion, the cabinet connecting portion of above-mentioned ground connection copper bar 27, filter band connecting portion and pars intermedia can be formed by same copper sheet bending.
In addition, ground connection copper bar 27 is also connected to ground wire 26, thereby can reduce the impedance of 26 of EMI filter band 23 and ground wires, can reduce the crosstalk signal that electric current produces like this, reduces the interference to conduction measurement instrument 24.
Especially, internal interference source 22 also can be connected to EMI filter band 23 by copper bar 34, thereby effectively reduces the impedance loop in EMI filter band 23 and internal interference source 22.
As shown in Figure 4, be the simplified model schematic diagram of EMI filter band conduction test among Fig. 2, shown in the figure simplified model of conduction test, actual EMI model relative complex.Za, Zb, Zc, Zd, Ze, Zf are the impedance on the copper stud 17, and impedance Z x, Zy, Zg, Zt are the machine intimate stray impedance.Particularly, above-mentioned impedance comprises that EMI filter band 13 is connected the impedance Z f that is connected induction reactance Zb below high frequency of impedance Z c, copper stud 17, EMI filter band 13 and output earth connection 16 of impedance Z a, copper stud 17 and casing 10 with copper stud 17, and high-frequency resistance Ze between the ground copper bar of earth connection 16 and rack, earth connection 16 and rack are connected impedance Z d copper stud 17.
Ground connection copper bar 27 in the utility model can reduce Za, Zb, Zc, effectively reduce the impedance loop of EMI filter band 23 and interference source, allow the EMI filter band effectively will disturb absorption, reduce and pass to outside interference, outside interference is measured by conduction measurement instrument 24.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (8)
1, a kind of mounting structure of EMI filter band, it is characterized in that, described EMI filter band is connected to cabinet by the ground connection copper bar, described ground connection bronze medal comprises flat cabinet connecting portion, filter band connecting portion and pars intermedia, wherein the cabinet connecting portion is close to and is fixed on the cabinet inwall, the filter band connecting portion is close to the surface that is fixed on the EMI filter band, and the two ends of pars intermedia connect described cabinet connecting portion and filter band connecting portion respectively.
2, the mounting structure of EMI filter band according to claim 1 is characterized in that, described cabinet connecting portion and filter band connecting portion be arranged in parallel.
3, the mounting structure of EMI filter band according to claim 2 is characterized in that, described pars intermedia is perpendicular to described cabinet connecting portion and filter band connecting portion.
According to the mounting structure of each described EMI filter band among the claim 1-3, it is characterized in that 4, described cabinet connecting portion, filter band connecting portion and pars intermedia are formed by same copper sheet bending.
5, the mounting structure of EMI filter band according to claim 1 is characterized in that, the area that described cabinet connecting portion contacts with the cabinet inwall is more than or equal to 2 square centimeters.
6, the mounting structure of EMI filter band according to claim 1 is characterized in that, the area that contacts on described filter band connecting portion and EMI filter band surface is more than or equal to 1 square centimeter.
7, the mounting structure of EMI filter band according to claim 1 is characterized in that, described ground connection copper bar is connected to ground wire.
8, the mounting structure of EMI filter band according to claim 1 is characterized in that, described EMI filter band is connected with the internal interference source by copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202350160U CN201341297Y (en) | 2008-12-12 | 2008-12-12 | Installing structure of EMI filter board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202350160U CN201341297Y (en) | 2008-12-12 | 2008-12-12 | Installing structure of EMI filter board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201341297Y true CN201341297Y (en) | 2009-11-04 |
Family
ID=41236840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202350160U Expired - Lifetime CN201341297Y (en) | 2008-12-12 | 2008-12-12 | Installing structure of EMI filter board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201341297Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028984A1 (en) * | 2010-08-30 | 2012-03-08 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance |
| CN106712458A (en) * | 2015-07-30 | 2017-05-24 | 台达电子工业股份有限公司 | Frequency converter structure with built-in EMI circuit |
-
2008
- 2008-12-12 CN CNU2008202350160U patent/CN201341297Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028984A1 (en) * | 2010-08-30 | 2012-03-08 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance |
| CN106712458A (en) * | 2015-07-30 | 2017-05-24 | 台达电子工业股份有限公司 | Frequency converter structure with built-in EMI circuit |
| CN106712458B (en) * | 2015-07-30 | 2018-12-14 | 台达电子工业股份有限公司 | The frequency changer of built-in EMI circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091104 |
|
| CX01 | Expiry of patent term |