CN101801170A - Electric field shield and manufacturing method thereof - Google Patents
Electric field shield and manufacturing method thereof Download PDFInfo
- Publication number
- CN101801170A CN101801170A CN 201010110735 CN201010110735A CN101801170A CN 101801170 A CN101801170 A CN 101801170A CN 201010110735 CN201010110735 CN 201010110735 CN 201010110735 A CN201010110735 A CN 201010110735A CN 101801170 A CN101801170 A CN 101801170A
- Authority
- CN
- China
- Prior art keywords
- conductor
- electric field
- narrow
- electric
- field shield
- 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.)
- Granted
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to an electric field shield and a manufacturing method thereof. The method comprises the steps of providing plural narrow conductors to form a comb-like or grid-like electric shielding plane; and choosing a point on each narrow conductor, electrically connecting the points and connecting the points to the needed points on the circuit by outgoing lines. The shield can effectively shield the electric fields of the magnetic elements, without bringing eddy current caused by the high-frequency alternating current magnetic fields on an electric shielding conductor and the loss caused by the eddy current and without changing distribution of the high-frequency magnetic fields inside and around the magnetic elements and the magnetic parameters of the magnetic elements.
Description
Technical field
The present invention relates to the electric field shielding technical field, be particularly useful for existing on the magnetic element high frequency AC magnetic field, need the application scenario of electric field shielding again.
Background technology
Electromagnetism conduction emission (ElectromagneticConductionEmission) is one of various electric equipments, especially electronic power converter important indicator of satisfying the electromagnetic compatibility standard.Electromagnetism conduction emission is divided into differential mode and common mode emission dual mode.The electromagnetic noise of common mode conduction emission mainly be by between conductor that has the potential change part in the circuit or the device or and have distributed capacitance between the earthing conductor of zero potential, form that charge inducing causes.Common mode conduction emission pathway complexity is the most unmanageable electromagnetic compatibility problem.Therefore the most frequently used method of reduction at present or the emission of inhibition common mode adopts the Faraday shield technology exactly, just shield circuit conductor or device with potential change by the metallic shield conductor that adopts the ground connection zero potential, cause field coupled passage with blocking-up to earth-current, its principle as shown in Figure 1, wherein electric field shielding Copper Foil 4 is used for the former limit winding 1 and the secondary winding 2 of mask switch power supply high frequency transformer 3, and the lead-out wire 6 of shielding Copper Foil 4 is connected to the point that Switching Power Supply is fit to.This electric field shielding method is used widely in electric device, and as electric field shielding between the winding of the former and deputy limit of transformer in the electronic power converter etc., as shown in Figure 2, wherein 5 is the magnetic core of transformer.
For electric field shield conductor,, all be to adopt the very high metal material of conductance, as Copper Foil in order to guarantee the equipotential of shielded conductor.Simultaneously owing to also can there be the high frequency magnetic field of interchange in the electric equipment simultaneously, as magnetic element in the electronic power converter, as inductance, magnetic field in the transformer etc., in order to reduce the electromagnetic induction eddy current loss that high frequency magnetic field produces in shielded conductor, the very thin Copper Foil of general employing, because the magnetic field of transformer inside generally is parallel with the thin plate of electric screen Copper Foil, therefore adopt thin Copper Foil can effectively reduce the eddy current loss that AC magnetic field causes in Copper Foil, but under high frequency (hundreds of KHz) situation, still can in the shielding Copper Foil, cause certain eddy current loss, thereby cause the reduction of heating and efficient.But under many circumstances, the magnetic field in the electric equipment not all is parallel plane with the electric screen Copper Foil also, and the use of electric screen Copper Foil at this moment will cause very big eddy current loss.Owing to the electromagnetic induction eddy current effect of Copper Foil under high frequency, can change original Distribution of Magnetic Field characteristic simultaneously, thereby cause the magnetic parameter of electromagnetic component to change, influence performance.
Therefore prior art adopts the Copper Foil conductor as electric field shield conductor, have two problems, the one, under the AC magnetic field effect, can bring additional high-frequency vortex loss, cause loss and heating, the 2nd, can cause the variation that do not have original magnetic field before the Copper Foil shielding and the change of electromagnetic component parameter.
Summary of the invention
In view of the deficiency of above-mentioned technology, another object of the present invention provides a kind of electric field shield, and this shield wraps up or is positioned over the position that needs shielding, and is connected in the circuit, can effectively play the effect of electric field shielding.
This electric field shield comprises the narrow conductor of complex root, it is characterized in that: the narrow conductor of described complex root constitutes pectination or latticed electric screen plane, and the narrow conductor of described complex root has only some electric connection between any two.
Another object of the present invention provides a kind of manufacture method of electric field shield, effectively plays the effect of electric field shielding by the shielding physical efficiency of this method making.
For achieving the above object, the present invention by the following technical solutions, a kind of manufacture method of electric field shield is characterized in that comprising: provide the narrow conductor of complex root to constitute pectination or latticed electric field shielding face; Respectively get a bit on the narrow conductor of described complex root, these points electrically connect each other then.
The present invention is simplicity of design not only, cost is low, when effectively playing the electric field shielding effect, can not bring eddy current that high frequency AC magnetic field causes and the loss that causes thereof on this electric screen conductor, can not change the characteristic distributions of high frequency magnetic field and the magnetic parameter of magnetic cell yet.
Description of drawings
Fig. 1 is a kind of electric screen schematic diagram on the former and deputy limit of transformer in the known Switching Power Supply.
Fig. 2 is the installation diagram of shielding Copper Foil 4 in Fig. 1 transformer.
Fig. 3-Fig. 6 is the formation schematic diagram of the narrow conductor of complex root of the present invention.
Fig. 7 is the electric screen floor map that the narrow conductor of the present invention constitutes.
Fig. 8 ~ Figure 10 is that shield of the present invention is wrapped in the schematic diagram that will shield the position state.
In the accompanying drawing: 3 is the Switching Power Supply high frequency transformer; 1 is former limit winding; 2 is the secondary winding; 4 are the shielding Copper Foil; 5 is the magnetic core of transformer; 6,13 is lead-out wire; 7 is narrow thin conductor, and 8 is the electric connection point between the conductor; 10,11 is the winding of magnetic element; 12 is the magnetic core of magnetic element; 14 is electric field shield.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
The invention provides a kind of electric field shield, comprise the narrow conductor of complex root, it is characterized in that: the narrow conductor of described complex root constitutes pectination or latticed electric screen plane, and the narrow conductor of described complex root has only some electric connection between any two.Described narrow conductor is the narrow thin conductor that thin wire or flexible circuit board technology are made.
In order to make this electric field shield, the invention provides a kind of manufacture method of electric field shield, it is characterized in that comprising: provide the narrow conductor of complex root to constitute pectination or latticed electric field shielding face; Respectively get a bit on the narrow conductor of described complex root, these points electrically connect each other then.Described narrow conductor is the narrow thin conductor by the thin wire conductor constitutes or flexible circuit board technology is made.The diameter of described thin wire conductor or the width of narrow thin conductor are less than to the depth of penetration of conductor 5 times of the electromagnetic field of high frequency of conductively-closed; Spacing distance between the conductor can suitably be determined according to the needs of electric screen.
As Fig. 8 to shown in Figure 10: when using this shield, with this electric screen body parcel or be positioned over the position that needs electric screen, and the lead-out wire of the electric connection point of electric field shielding face is electrically connected to the point that needs in the circuit.As in electronic power converter, be used to wrap up the former limit or the secondary winding of transformer, shielding the current potential induction field over the ground of former limit winding or secondary winding, or the former limit winding of parcel transformer is with the current potential that the shields former limit winding induction field to the secondary winding; The present invention is particularly useful for existing high frequency AC magnetic field, needs the application scenario of electric field shielding again.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. an electric field shield comprises the narrow conductor of complex root, it is characterized in that: the narrow conductor of described complex root constitutes pectination or latticed electric screen plane, and the narrow conductor of described complex root has only some electric connection between any two.
2. electric field shield according to claim 1 is characterized in that: described narrow conductor is the narrow thin conductor that thin wire or flexible circuit board technology are made.
3. the manufacture method of an electric field shield is characterized in that comprising: provide the narrow conductor of complex root to constitute pectination or latticed electric field shielding face; Respectively get a bit on the narrow conductor of described complex root, these points electrically connect each other then.
4. the manufacture method of electric field shield according to claim 3, it is characterized in that: described narrow conductor is the narrow thin conductor by the thin wire conductor constitutes or flexible circuit board technology is made.
5. the manufacture method of electric field shield according to claim 4 is characterized in that: the diameter of described thin wire conductor or the width of narrow thin conductor are less than to the depth of penetration of conductor 5 times of the electromagnetic field of high frequency of conductively-closed; Spacing distance between the conductor can suitably be determined according to the needs of electric screen.
6. the manufacture method of electric field shield according to claim 3 is characterized in that further comprising: the position that needs electric screen in the magnetic element is wrapped up in or be positioned over to described electric screen bread; And the lead-out wire of the electric connection point of electric field shielding face is electrically connected to the point that needs in the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010110735 CN101801170B (en) | 2010-02-21 | 2010-02-21 | Electric field shield and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010110735 CN101801170B (en) | 2010-02-21 | 2010-02-21 | Electric field shield and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101801170A true CN101801170A (en) | 2010-08-11 |
| CN101801170B CN101801170B (en) | 2013-02-27 |
Family
ID=42596566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010110735 Expired - Fee Related CN101801170B (en) | 2010-02-21 | 2010-02-21 | Electric field shield and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101801170B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798828A (en) * | 2012-08-06 | 2012-11-28 | 中国地质科学院地球物理地球化学勘查研究所 | Frequency domain induction type magnetic field sensor |
| CN103165277A (en) * | 2011-12-09 | 2013-06-19 | 比亚迪股份有限公司 | Transformer and manufacturing method thereof |
| CN107607460A (en) * | 2017-08-25 | 2018-01-19 | 爱德森（厦门）电子有限公司 | A kind of method for improving the online fluid metal worn particle electromagnetic monitoring degree of accuracy |
| CN107635388A (en) * | 2017-08-25 | 2018-01-26 | 北京精密机电控制设备研究所 | A kind of high transmission rate self-adaptive electromagnetic screening arrangement |
| CN113848369A (en) * | 2021-09-24 | 2021-12-28 | 华北电力大学 | Rogowski coil type current sensor with zigzag air gap channel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288951C (en) * | 2001-03-02 | 2006-12-06 | 日立化成工业株式会社 | Electromagnetic shield film, electromagnetic shield unit and display |
| JP2003152380A (en) * | 2001-11-19 | 2003-05-23 | Riken Corp | Magnetic shielding case |
-
2010
- 2010-02-21 CN CN 201010110735 patent/CN101801170B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165277A (en) * | 2011-12-09 | 2013-06-19 | 比亚迪股份有限公司 | Transformer and manufacturing method thereof |
| CN102798828A (en) * | 2012-08-06 | 2012-11-28 | 中国地质科学院地球物理地球化学勘查研究所 | Frequency domain induction type magnetic field sensor |
| CN107607460A (en) * | 2017-08-25 | 2018-01-19 | 爱德森（厦门）电子有限公司 | A kind of method for improving the online fluid metal worn particle electromagnetic monitoring degree of accuracy |
| CN107635388A (en) * | 2017-08-25 | 2018-01-26 | 北京精密机电控制设备研究所 | A kind of high transmission rate self-adaptive electromagnetic screening arrangement |
| CN107635388B (en) * | 2017-08-25 | 2019-07-12 | 北京精密机电控制设备研究所 | A kind of high transparency self-adaptive electromagnetic screening arrangement |
| CN113848369A (en) * | 2021-09-24 | 2021-12-28 | 华北电力大学 | Rogowski coil type current sensor with zigzag air gap channel |
| CN113848369B (en) * | 2021-09-24 | 2023-04-25 | 华北电力大学 | Rogowski coil type current sensor with zigzag air gap channel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101801170B (en) | 2013-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101801170B (en) | Electric field shield and manufacturing method thereof | |
| CN110301019B (en) | Transformer and switching power supply | |
| CN202749216U (en) | Discharge-preventing shielding device for current transformer | |
| CN112071583B (en) | High-voltage isolation voltage-resistant planar transformer and high-voltage insulation method thereof | |
| CN208538655U (en) | Flat surface transformer with cooling mechanism | |
| CN206022066U (en) | A kind of novel transformer core assembly | |
| CN204577235U (en) | Flat surface transformer | |
| CN209168903U (en) | A kind of winding construction and transformer | |
| CN202870144U (en) | Current measuring device for breaker or switch cabinet | |
| CN203895216U (en) | Powder metallurgy soft magnetic tank type inductor | |
| CN204651048U (en) | A kind of wisdom energy acid-fast alkali-proof height anti-interference type guide cable | |
| CN103956215A (en) | Shielding cable | |
| CN204720297U (en) | A kind of transformer framework structure | |
| CN203536194U (en) | Y-capacitor-free transformer | |
| CN204834298U (en) | Electronic transformer with thin slice coil | |
| CN109346291B (en) | Winding structure and transformer | |
| CN105071364B (en) | A method of limitation transformer station secondary system cable shield parasite current | |
| CN104485207B (en) | Conjugation-type outer iron core reactor | |
| CN203733555U (en) | Transformer for high-frequency power source | |
| CN203732597U (en) | Novel electronic voltage transformer | |
| CN202384160U (en) | Planar transformer | |
| CN208903808U (en) | The multi-thread packet insulated conductor transformer of high-frequency and high-voltage | |
| CN209561160U (en) | Filter potential device | |
| CN202352444U (en) | Mutual inductor with anti-electromagnetic interference insulating casing | |
| CN202711920U (en) | Inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20200221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |