CN201421774Y - Electromagnetic shielding device of mutual inductor - Google Patents
Electromagnetic shielding device of mutual inductor Download PDFInfo
- Publication number
- CN201421774Y CN201421774Y CN200920142378XU CN200920142378U CN201421774Y CN 201421774 Y CN201421774 Y CN 201421774Y CN 200920142378X U CN200920142378X U CN 200920142378XU CN 200920142378 U CN200920142378 U CN 200920142378U CN 201421774 Y CN201421774 Y CN 201421774Y
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- screen
- iron
- core coil
- instrument transformer
- electromagnetic
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Abstract
The utility model discloses an electromagnetic shielding device of a mutual inductor, which comprises an iron core coil. The electromagnetic shielding device is characterized in that the left and theright ends and the upper and the lower ends of the iron core coil are all provided with shielding layers, and the shielding layers at the left and the right ends are overlapped and superposed with theshielding layers at the upper and the lower ends. Compared with the prior art, the electromagnetic shielding device of the mutual inductor has the advantages of having fine shielding performance andgreatly decreasing electromagnet leakage rate.
Description
Technical field
The utility model belongs to the electromangnetic spectrum field of instrument transformer, more specifically relates to a kind of electromagnetic screen of instrument transformer.
Background technology
Along with the development of China's electric utility, single-machine capacity reaches 300MW, even the generator sequential use of 600MW.Because the loop current of this heavy-duty generator group is big, and every close together separately, therefore can produce very strong electromagnetic field.If this powerful electromagnetic field can not well shield,, and influence testing result not only to the instrument transformer serious interference.
In order to solve problems such as back flow current is big, in the prior art instrument transformer skin is set up safeguard measure, set up the metallic shield outer cover as US Westinghouse company in the outside of instrument transformer.But, be difficult to realize in the market because the metallic shield outer cover needs very high metal purity and conductance.And about the iron-core coil outside of instrument transformer, screen or barricade are set during the way that generally adopts, the zero sequence current mutual inductor that a kind of residual current circuit breaker is used was disclosed January 3 calendar year 2001 as Chinese patent ZL00219667.0, comprise iron core, be configured in the insulation casing in the iron core outside, be wrapped in around the insulation casing coil windings and in, compositions such as outer shielding layer and side barricade, in described, outer shielding layer is the hiperloy sheet that rolls into ring-type, internal shield is arranged in the interior annular ring of iron core, outer shielding layer is nested with on the outer ring circle of iron core, by the adhesive cementation, described side barricade sticks on by interior between the three, the left side of the member that coil windings is formed of outer shielding layer and iron core, on the right flank.Though this patent shield technology relative and before is greatly improved, the performance of electromagnetic shielding is still not good in the real world applications process; And the bigger leakage field phenomenon of existence.The present invention comes therefrom.
Summary of the invention
The utility model purpose is to provide a kind of electromagnetic screen of instrument transformer, and it is not good that this invention has solved in the prior art electromagnetic screen shielding properties of instrument transformer, leakage field easily, problem such as the leakage field rate is comparatively serious.
In order to solve these problems of the prior art, the technical scheme that the utility model provides is as follows:
A kind of electromagnetic screen of instrument transformer comprises iron-core coil, it is characterized in that two ends, the described iron-core coil left and right sides and up and down two ends all be provided with screen.
Preferably, two ends, described left and right sides screen is the parallel screen of multilayer that two ends, the iron-core coil left and right sides are provided with.
Preferably, described two ends screen up and down is the iron-core coil parallel screen of multilayer of two ends setting up and down.
Preferably, described iron-core coil left and right sides end face is provided with the parallel screen of multilayer; The iron-core coil upper and lower end face also is provided with the parallel screen of multilayer.
Preferably, described screen is a metal screen layer.
Preferably, described screen is iron screen.
Preferably, the screen of the described iron-core coil left and right sides and the screen vertical angle at two ends up and down.
The utility model advantage is:
1. the outer electro-magnetic screen layer design of technical scheme instrument transformer of the present invention changes the intersection parallel stacked into by parallel stacked, can significantly reduce electromagnetic leakage, obtains comparatively satisfied effect.
2. technical scheme of the present invention makes that the back flow current induction produces circulation and heat comparatively fast distributes owing to adopt the electro-magnetic screen layer of intersection parallel stacked, has increased the radiating effect of instrument transformer.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the structural representation of the electromagnetic screen of embodiment of the invention instrument transformer.
Wherein: 1 is the upper and lower end face screen, and 2 is left and right sides end face screen, and 3 is iron-core coil.
Embodiment
For the technical scheme of more detailed statement foregoing invention, the following inventor lists specific embodiment and comes bright technique effect; It is emphasized that these embodiment to be used to the present invention is described and be not limited to limit the scope of the invention.
Embodiment such as Fig. 1 are the electromagnetic screen of instrument transformer, comprise iron-core coil 3, two ends, the described iron-core coil left and right sides and up and down two ends all be provided with screen.Two ends, left and right sides screen 2 is the parallel screen of multilayer that two ends, the iron-core coil left and right sides are provided with.Two ends screen 1 is the iron-core coil parallel screen of multilayer of two ends setting up and down up and down.Intersect stacked by upper and lower end face screen and left and right sides end face screen.
Screen is iron screen; The screen of the iron-core coil left and right sides is vertical with the screen at two ends up and down.By iron-core coil left and right sides end face and upper and lower end face the stacked parallel screen of multilayer intersection is set, greatly reduces the leakage rate of electromagnetic shielding.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (7)
1. the electromagnetic screen of an instrument transformer comprises iron-core coil, it is characterized in that two ends, the described iron-core coil left and right sides and up and down two ends all be provided with screen.
2, the electromagnetic screen of instrument transformer according to claim 1 is characterized in that two ends, described left and right sides screen is the parallel screen of multilayer that two ends, the iron-core coil left and right sides are provided with.
3, the electromagnetic screen of instrument transformer according to claim 1 is characterized in that described two ends screen up and down is the iron-core coil parallel screen of multilayer of two ends setting up and down.
4, the electromagnetic screen of instrument transformer according to claim 1 is characterized in that described iron-core coil left and right sides end face is provided with the parallel screen of multilayer; The iron-core coil upper and lower end face also is provided with the parallel screen of multilayer.
5, the electromagnetic screen of instrument transformer according to claim 1 is characterized in that described screen is a metal screen layer.
6, the electromagnetic screen of instrument transformer according to claim 5 is characterized in that described screen is iron screen.
7, the electromagnetic screen of instrument transformer according to claim 1 is characterized in that the screen of the described iron-core coil left and right sides and the screen vertical angle at two ends up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920142378XU CN201421774Y (en) | 2009-04-09 | 2009-04-09 | Electromagnetic shielding device of mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920142378XU CN201421774Y (en) | 2009-04-09 | 2009-04-09 | Electromagnetic shielding device of mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201421774Y true CN201421774Y (en) | 2010-03-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920142378XU Expired - Fee Related CN201421774Y (en) | 2009-04-09 | 2009-04-09 | Electromagnetic shielding device of mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201421774Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249018A (en) * | 2016-08-23 | 2016-12-21 | 中国电力科学研究院 | A kind of and electronic transducer calibration instrument works in coordination with the high-precision voltage divider of use and the method for designing of potentiometer |
| CN107086108A (en) * | 2017-06-15 | 2017-08-22 | 中广核达胜加速器技术有限公司 | A kind of solenoid transformer and electron accelerator for possessing function of shielding |
| CN110739139A (en) * | 2018-07-18 | 2020-01-31 | 三星电机株式会社 | Coil component |
| CN111030315A (en) * | 2019-12-03 | 2020-04-17 | 广东电科院能源技术有限责任公司 | Wireless charging system of underwater equipment, coil of wireless charging system and maximum power tracking method |
| CN112837916A (en) * | 2021-01-27 | 2021-05-25 | 江阴市星火电子科技有限公司 | Open-close type zero sequence current transformer with shielding |
-
2009
- 2009-04-09 CN CN200920142378XU patent/CN201421774Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249018A (en) * | 2016-08-23 | 2016-12-21 | 中国电力科学研究院 | A kind of and electronic transducer calibration instrument works in coordination with the high-precision voltage divider of use and the method for designing of potentiometer |
| CN107086108A (en) * | 2017-06-15 | 2017-08-22 | 中广核达胜加速器技术有限公司 | A kind of solenoid transformer and electron accelerator for possessing function of shielding |
| CN110739139A (en) * | 2018-07-18 | 2020-01-31 | 三星电机株式会社 | Coil component |
| US11587722B2 (en) | 2018-07-18 | 2023-02-21 | Samsung Electro-Mechanics Co., Ltd. | Coil component |
| CN110739139B (en) * | 2018-07-18 | 2023-08-22 | 三星电机株式会社 | coil assembly |
| CN111030315A (en) * | 2019-12-03 | 2020-04-17 | 广东电科院能源技术有限责任公司 | Wireless charging system of underwater equipment, coil of wireless charging system and maximum power tracking method |
| CN112837916A (en) * | 2021-01-27 | 2021-05-25 | 江阴市星火电子科技有限公司 | Open-close type zero sequence current transformer with shielding |
| CN112837916B (en) * | 2021-01-27 | 2022-02-01 | 江阴市星火电子科技有限公司 | Open-close type zero sequence current transformer with shielding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20100310 Termination date: 20150409 |
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| EXPY | Termination of patent right or utility model |