CN2724378Y - Electromagnetic interference shield cover - Google Patents
Electromagnetic interference shield cover Download PDFInfo
- Publication number
- CN2724378Y CN2724378Y CN 200420093492 CN200420093492U CN2724378Y CN 2724378 Y CN2724378 Y CN 2724378Y CN 200420093492 CN200420093492 CN 200420093492 CN 200420093492 U CN200420093492 U CN 200420093492U CN 2724378 Y CN2724378 Y CN 2724378Y
- Authority
- CN
- China
- Prior art keywords
- transformer
- electromagnetic interference
- circuit
- interference shield
- inlet
- 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 - Fee Related
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to an electromagnetic interference shield cover used for the inter circuit of the modular power supply. On the basis of the prior art, the utility model fixes a set of surface-tinned copper sheets between the inlet circuit of the modular power supply and the main power conversion circuit and connects with the inlet electricity, making the inlet circuit isolate in space from the main power conversion circuit. The electromagnetic interference shield cover can absorb and shield effectively the conductive interference caused by the high-frequency electromagnetic field to the inlet circuit because of the dramatic changes of the voltage and the current of the main power conversion circuit like the reduction transformer, which further reduces the pressure of the electric network. The copper sheets is extended to the upper of the transformer and attaches the transformer tightly, the copper sheet can absorb and shield the radiant energies produced by the transformer and help to improve the heat radiation effect of the transformer. The utility model can be used for multiple models of modular power supply and other occasions.
Description
Technical field
The utility model relates to a kind of electromagnetic interference shield, mainly is the inlet circuit that is used for modular power source.
Background technology
The EMI of modular power source (electromagnetic interference) has been subjected to increasing user's attention as the important indicator of weighing the modular power source performance.Two indexs of test module EMI are conducted interference and radiated interference.For modular power source, maximum interference source is the main power conversion circuit that transformer and switching tube etc. constitute.Because this circuit continues to change on fixing frequency, and existing modular power source inlet circuit and main power conversion circuit distance are near, the electromagnetic field of high frequency that main power conversion circuit voltage and current jumpy is produced causes the conducted interference of inlet circuit big, and electrical network has been produced great influence.Therefore being badly in need of a technical scheme addresses this problem.
The utility model content
In order to reduce radiation that main power conversion circuit the produces influence to the inlet circuit, the utility model provides a kind of electromagnetic interference shield.
The technical solution of the utility model is: on the basis of existing technology, the copper sheet of one group of electroplating surfaces with tin is fixed between the inlet circuit and main power conversion circuit of modular power source, and makes the copper sheet of extension be close to transformer.
Because the utility model utilizes zinc-plated copper sheet that inlet circuit and main power conversion circuit are carried out spatial separation, conduct to ground by the emittance that will absorb, thereby effectively absorb and shielded of the radiation of main power conversion circuit, significantly reduced the conducted interference of inlet circuit inlet circuit and electrical network.The copper sheet of being close to transformer absorbs and has shielded the emittance of transformer, has also improved the radiating effect of transformer.
Description of drawings
Fig. 1 is a plane outspread drawing of the present utility model
Schematic diagram when Fig. 2 is the utility model use
Embodiment
As depicted in figs. 1 and 2, electromagnetic interference shield comprise the copper sheet 1 that extends to transformer 5 tops, around copper sheet 2 and the pin 3 and the pin 4 of inlet circuit 6.
Described copper sheet 1 should be close to transformer 5, to guarantee good absorption, radiation-screening effect and radiating effect.
Described copper sheet 2 should be around inlet circuit 6.
Described pin 3 generally can be connected with printed circuit board (PCB) by welding manner with pin 4, and this welding manner both can realize that radome with being electrically connected of printed circuit board (PCB), can play a part radome fixing again.
Claims (4)
1. electromagnetic interference shield that is mainly used in modular power source comprises one group around entering the mouth circuit and extend to the zinc-plated copper sheet of transformer top, it is characterized in that the tin-coated copper sheet around the inlet circuit part, and extends to the transformer top.
2. electromagnetic interference shield as claimed in claim 1 is characterized in that the described length that extends to the copper sheet of transformer top can not surpass 3/4 of transformer frontal width.
3. electromagnetic interference shield as claimed in claim 1 is characterized in that described electromagnetic interference shield with being electrically connected with entering the mouth.
4. electromagnetic interference shield as claimed in claim 1 is characterized in that described electromagnetic interference shield connects with printed circuit board (PCB) by the mode of two means of spot welds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093492 CN2724378Y (en) | 2004-09-10 | 2004-09-10 | Electromagnetic interference shield cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093492 CN2724378Y (en) | 2004-09-10 | 2004-09-10 | Electromagnetic interference shield cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2724378Y true CN2724378Y (en) | 2005-09-07 |
Family
ID=35037996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420093492 Expired - Fee Related CN2724378Y (en) | 2004-09-10 | 2004-09-10 | Electromagnetic interference shield cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2724378Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686610B (en) * | 2008-09-25 | 2012-10-17 | 深圳富泰宏精密工业有限公司 | Printing circuit board |
| CN104330594A (en) * | 2014-11-05 | 2015-02-04 | 国网辽宁省电力有限公司抚顺供电公司 | Partial discharge test shielding cover for large transformer |
-
2004
- 2004-09-10 CN CN 200420093492 patent/CN2724378Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686610B (en) * | 2008-09-25 | 2012-10-17 | 深圳富泰宏精密工业有限公司 | Printing circuit board |
| CN104330594A (en) * | 2014-11-05 | 2015-02-04 | 国网辽宁省电力有限公司抚顺供电公司 | Partial discharge test shielding cover for large transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209497668U (en) | A kind of slim pcb board with shielding construction | |
| CN2724378Y (en) | Electromagnetic interference shield cover | |
| CN202995748U (en) | Card reader having flexible printed circuit board antenna | |
| CN202652046U (en) | High-power synchronous rectification high-frequency switching power supply assembling structure | |
| CN203251517U (en) | Integratedly-designed speed-adjustable motor controller | |
| CN207884398U (en) | A kind of motor brush rocker component | |
| CN203690497U (en) | Antenna denoising device and mobile terminal | |
| CN213278785U (en) | Low-voltage switchgear convenient to overhaul | |
| CN110212785B (en) | Intelligent panel with antenna | |
| CN212786477U (en) | Integral type insulating tape shielding heat dissipation fixing device | |
| CN2891466Y (en) | Wind cooled high frequency switch power supply structure | |
| CN202798481U (en) | Power device used for photovoltaic inverter | |
| CN103020561A (en) | Card reader containing flexible printed circuit antenna | |
| CN201374653Y (en) | Power adjuster of fuel battery | |
| CN209462255U (en) | A kind of filter, DC-to-dc converter and All-in-One controller | |
| CN221409652U (en) | EMI suppression structure of charger with PFC circuit | |
| CN202150359U (en) | Aluminium electrolytic capacitor | |
| CN2850192Y (en) | Coil disk | |
| CN217640990U (en) | Fast heat dissipation type harmonic suppression capacitor | |
| CN221263094U (en) | Power distribution cabinet with improved mounting plate | |
| CN218104068U (en) | Anti-magnetic interference structure of printed circuit board | |
| CN202613373U (en) | Power supply device of electrodeless lamp | |
| CN209824126U (en) | Flexible circuit board for enhancing anti-interference capability of module | |
| CN211957401U (en) | Simple transformer | |
| CN207425633U (en) | A kind of high-frequency coupling thin-film capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |