CN117809956B - Electromagnetic wave weakening structure and weakening method of power transformer - Google Patents
Electromagnetic wave weakening structure and weakening method of power transformer Download PDFInfo
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- CN117809956B CN117809956B CN202410025927.4A CN202410025927A CN117809956B CN 117809956 B CN117809956 B CN 117809956B CN 202410025927 A CN202410025927 A CN 202410025927A CN 117809956 B CN117809956 B CN 117809956B
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- 230000003313 weakening effect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 239000006229 carbon black Substances 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 229920002545 silicone oil Polymers 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000005060 rubber Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000644 propagated effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical class C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention belongs to the technical field of power transformers, in particular to an electromagnetic wave weakening structure and a weakening method of a power transformer, and the electromagnetic wave weakening structure comprises a shell, wherein a power module is fixedly arranged on the inner bottom wall of the shell, a cavity is formed in the inner wall of the shell, a honeycomb hole extending to the inner wall of the shell is formed in the inner wall of the cavity, wave absorbing liquid is filled in the cavity so as to absorb electromagnetic waves uploaded and broadcasted by the power module into the wave absorbing liquid, and wave absorbing columns are fixedly arranged on the inner wall of the honeycomb hole so as to absorb waves of the power module. According to the electromagnetic wave weakening structure and the electromagnetic wave weakening method of the power transformer, electromagnetic waves generated by the power module can be fully absorbed, heat energy after conversion is absorbed, the area of the wave absorbing ball head for absorbing the electromagnetic waves can be increased, the electromagnetic waves generated by the power module are weakened more quickly, and accordingly the detected problem is avoided.
Description
Technical Field
The invention relates to the technical field of power transformers, in particular to a power transformer electromagnetic wave weakening structure and a weakening method.
Background
Electromagnetic waves generated by power transformers are mainly concentrated in the low frequency and radio frequency ranges. Low frequency electromagnetic waves generally refer to electromagnetic radiation having frequencies in the range of tens of hertz to kilohertz, whereas radio frequency electromagnetic waves refer to electromagnetic radiation having frequencies in the range of hundreds of megahertz to gigahertz.
In the military power filter with the bulletin number of CN 212343636U disclosed on the Chinese patent website, common mode and differential mode interference can be attenuated and electromagnetic interference and radiated electromagnetic interference can be reduced through the EMI filter circuit, and the electromagnetic interference resistance and surge pulse resistance of the military power filter can be improved through the mutual matching of the surge suppression circuit and the EMI filter circuit.
However, the following disadvantages still exist:
Although the above-mentioned prior art can improve the electromagnetic interference resistance and surge pulse resistance of the military power filter, the use of the power transformer at high frequency is accompanied by the use of the power transformer as a power supply element of all electrical components, and the use of high frequency can make the power transformer generate heat, and coil windings and other electronic components can generate electromagnetic waves which are easy to be detected, and the electromagnetic waves are extremely easy to be detected, which is fatal to the whole equipment.
Disclosure of Invention
Based on the prior art, the invention provides a power transformer electromagnetic wave weakening structure and a weakening method.
The invention provides an electromagnetic wave weakening structure of a power transformer, which comprises a shell, wherein a power module is fixedly arranged on the inner bottom wall of the shell.
The inner wall of the shell is provided with a cavity, and the inner wall of the cavity is provided with honeycomb holes extending to the inner wall of the shell.
The wave absorbing liquid is filled in the cavity, so that the action of absorbing electromagnetic waves which are uploaded and broadcast by the power supply module into the wave absorbing liquid is realized.
The inner wall of the honeycomb hole is fixedly provided with a wave absorbing column so as to realize wave absorbing action on the power supply module.
The honeycomb holes are fixedly provided with wave absorbing balls close to the inner end of the shell so as to realize the action of increasing the wave absorbing area.
Preferably, support columns are fixedly arranged on the inner side walls of the cavities, and the support columns are made of ferrite.
Through the technical scheme, the ferrite has the absorption capacity for electromagnetic waves in a specific frequency range.
Preferably, the outer surface of the support column is fixedly wrapped with a silica gel sleeve.
Through above-mentioned technical scheme, the ferrite can effectively be protected to the silica gel cover, and the silica gel also has the effect of absorbing waves.
Preferably, the wave absorbing liquid consists of benzene chloride, fluorinated liquid and silicone oil.
Through above-mentioned technical scheme, constitute new wave-absorbing liquid by wave-absorbing liquid, not only can have the wave-absorbing function, can also utilize the heat energy that the wave-absorbing produced to heat it simultaneously, more can be favorable to wave-absorbing liquid's fusion to promote wave-absorbing liquid wave-absorbing effect.
Preferably, the wave-absorbing liquid is prepared by mixing, by mass, 27% -33% of benzene chloride, 12% -18% of fluorinated liquid and 33% -40% of silicone oil, adding 5% -9% of cross-linking agent after stirring and mixing, and then performing final stirring action.
Through the technical scheme, the cross-linking agent is added, so that the solutions can be fully fused together.
Preferably, carbon black bars are fixedly arranged on the inner walls of the honeycomb holes, and rubber sleeves are fixedly wrapped on the outer surfaces of the carbon black bars.
Through the technical scheme, the carbon black is a carbon-based material and has good wave absorbing performance.
Preferably, the wave-absorbing fiber penetrating through the carbon black rod is fixedly arranged at the inner top wall of the shell.
Through the technical scheme, the wave-absorbing fiber can convert electromagnetic waves into heat energy, so that absorption is realized.
Preferably, the inner wall of the shell is coated with a wave-absorbing coating, and the interior of the wave-absorbing coating consists of a micro-carbon coil.
Through the technical scheme, the micro-carbon coil generates induction current in the variable electromagnetic field by utilizing the special three-dimensional spiral structure of the micro-carbon coil, and finally releases energy in a form of heat energy so as to achieve the effect of efficiently absorbing electromagnetic waves.
Preferably, the surface of the wave-absorbing ball head is provided with a conducting hole.
Through the technical scheme, the electromagnetic waves can be conducted through the conducting holes.
A weakening method of an electromagnetic wave weakening structure of a power transformer comprises the following steps that firstly, when a power module emits electromagnetic waves, one part of the electromagnetic waves enter a honeycomb hole through a wave absorbing ball and a conducting hole, then enter a cavity after being absorbed by a carbon black rod primary, and the other part of the electromagnetic waves are absorbed by a wave absorbing coating primary and converted into heat energy and then enter the cavity through the honeycomb hole.
And step two, after the electromagnetic wave is primarily absorbed in the step one, the residual electromagnetic wave is secondarily absorbed by the wave absorbing liquid in the cavity.
And thirdly, conducting heat energy generated after the wave-absorbing coating absorbs the heat energy through the carbon black rod to realize micro-heating action on the wave-absorbing liquid.
The beneficial effects of the invention are as follows:
Through setting up the wave absorbing liquid, can fully absorb the electromagnetic wave that power module produced to absorb the heat energy after the conversion, the wave absorbing bulb can increase the area of absorbing the electromagnetic wave, and the electromagnetic wave that the weakening power module produced faster, thereby avoid the problem emergence that is detected.
Drawings
Fig. 1 is a schematic diagram of an electromagnetic wave attenuation structure and an electromagnetic wave attenuation method for a power transformer according to the present invention;
Fig. 2 is a partial perspective view of a cavity structure of a power transformer electromagnetic wave attenuation structure and a attenuation method according to the present invention;
fig. 3 is a perspective view of a wave absorbing ball head structure of a power transformer electromagnetic wave attenuation structure and attenuation method according to the present invention.
In the figure: 1. a housing; 2. a power module; 3. a conductive via; 4. a cavity; 5. honeycomb holes; 6. wave absorbing liquid; 7. a wave-absorbing column; 8. wave-absorbing ball head; 9. a support column; 10. a carbon black rod; 11. a rubber sleeve; 12. a wave-absorbing fiber; 13. a wave-absorbing coating; 14. and a silica gel sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 3, an electromagnetic wave attenuation structure of a power transformer includes a housing 1, and a power module 2 is fixedly installed at an inner bottom wall of the housing 1.
In order to fully absorb electromagnetic waves emitted by the power module 2, the cavity 4 is formed at the inner wall of the housing 1, and the lower surface of the housing 1 is covered on the top of the housing 1, so that the cavity 4 does not need to be formed on the lower surface of the housing 1.
In order to enhance the strength of the cavity 4, a support column 9 is fixedly arranged at the inner side wall of the cavity 4, and the support column 9 is made of ferrite. Ferrites have an absorption capacity for electromagnetic waves in a specific frequency range.
In order to prevent the support column 9 from affecting the wave absorbing effect of the cavity 4, a silica gel sleeve is fixedly wrapped on the outer surface of the support column 9. The silica gel sleeve can effectively protect ferrite, and the silica gel also has the wave absorbing effect.
In order to fully absorb electromagnetic waves, the cavity 4 is filled with a wave absorbing liquid 6, so as to realize the action of absorbing the electromagnetic waves uploaded and broadcast by the power module 2 into the wave absorbing liquid 6.
The wave absorbing liquid 6 consists of benzene chloride, fluorinated liquid and silicone oil. The wave-absorbing liquid 6 is prepared by mixing, by mass, 27% -33% of benzene chloride, 12% -18% of fluorinated liquid and 33% -40% of silicone oil, adding 5% -9% of a cross-linking agent after stirring and mixing, and then performing final stirring action. And the cross-linking agent is added, so that the solutions can be fully fused together.
Benzene chloride: benzene chloride is an organic solvent, and has good electrical insulation performance and a certain electromagnetic wave absorption capacity. It is commonly used for cooling and insulating fluids for electronic devices.
Fluorinated liquid: fluorinated liquids are a class of liquids composed of fluorinated carbon compounds, which have excellent insulating properties and high electromagnetic wave absorption capacity. It is commonly used for cooling and insulation of electronic devices and communication devices.
Silicone oil: silicone oil is an organosilicon compound, and has good insulating property and a certain electromagnetic wave absorption capacity. It remains stable in high temperature and high pressure environments and is commonly used for insulation and cooling of electrical and high temperature electronics.
The novel wave-absorbing liquid is composed of wave-absorbing liquid, so that the wave-absorbing liquid not only has a wave-absorbing function, but also can be heated by utilizing heat energy generated by wave absorption, and is more beneficial to fusion of the wave-absorbing liquid, thereby promoting wave-absorbing effect of the wave-absorbing liquid.
The inner wall of the cavity 4 is provided with honeycomb holes 5 extending to the inner wall of the shell 1.
The inner wall of the honeycomb hole 5 is fixedly provided with a carbon black rod 10, and the outer surface of the carbon black rod 10 is fixedly wrapped with a rubber sleeve 11. Carbon black is a carbon-based material and has good wave absorbing performance. Carbon black can be added to many materials, such as rubber, plastic and coating, to improve the electromagnetic wave absorbing ability of these materials, due to the nature of its fine particles.
In order to directly absorb electromagnetic waves, a wave absorbing column 7 is fixedly installed on the inner wall of the honeycomb hole 5 to absorb the electromagnetic waves of the power module 2.
The wave-absorbing fiber 12 penetrating through the carbon black rod 10 is fixedly arranged at the inner top wall of the shell 1. The wave-absorbing fiber 12 is capable of converting electromagnetic waves into thermal energy, thereby effecting absorption.
The surface of the wave-absorbing ball head 8 is provided with a conducting hole 3. The conductive hole 3 is capable of conducting electromagnetic waves.
The honeycomb holes 5 are fixedly provided with wave absorbing balls 8 near the inner end of the shell 1 so as to realize the action of increasing the wave absorbing area.
The inner wall of the shell 1 is coated with a wave-absorbing coating 13, and the inside of the wave-absorbing coating 13 is composed of a micro-carbon coil. The micro-carbon coil generates induction current in the variable electromagnetic field by utilizing a special three-dimensional spiral structure of the micro-carbon coil, and finally releases energy in a form of heat energy so as to achieve the effect of efficiently absorbing electromagnetic waves.
Through setting up wave absorbing liquid 6, can fully absorb the electromagnetic wave that power module 2 produced to absorb the heat energy after the conversion, wave absorbing bulb 8 can increase the area of absorbing the electromagnetic wave, and the electromagnetic wave that the weakening power module 2 produced faster, thereby avoid the problem emergence that is detected.
A weakening method of an electromagnetic wave weakening structure of a power transformer comprises the following steps that firstly, when an electromagnetic wave is emitted by a power module 2, one part of the electromagnetic wave enters into a honeycomb hole 5 through a wave absorbing ball and a conducting hole 3, then enters into a cavity 4 after being primarily absorbed by a carbon black rod 10, and the other part of the electromagnetic wave enters into the cavity 4 after being primarily absorbed by a wave absorbing coating 13 and converted into heat energy through the honeycomb hole 5.
And step two, after the electromagnetic wave is primarily absorbed in the step one, the residual electromagnetic wave is secondarily absorbed by the wave absorbing liquid 6 in the cavity 4.
And thirdly, conducting heat energy generated after the wave-absorbing coating 13 absorbs the heat energy through the carbon black rod 10 and then micro-heating the wave-absorbing liquid 6.
By absorbing the primary and secondary power supply modules 2, electromagnetic waves can be sufficiently absorbed and reused, and heat energy converted from electromagnetic waves can be absorbed and reused.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The electromagnetic wave weakening structure of the power transformer comprises a shell (1), wherein a power module (2) is fixedly arranged on the inner bottom wall of the shell (1);
the method is characterized in that: a cavity (4) is formed in the inner wall of the shell (1), and honeycomb holes (5) extending into the shell (1) are formed in the inner wall of the cavity (4);
The wave absorbing liquid (6) is filled in the cavity (4) so as to realize the action of absorbing electromagnetic waves propagated on the power module (2) into the wave absorbing liquid (6);
The wave absorbing liquid (6) consists of benzene chloride, fluorinated liquid and silicone oil, wherein the wave absorbing liquid (6) is stirred and mixed, then a cross-linking agent is added, and the wave absorbing liquid (6) and the cross-linking agent are mixed according to mass percentage: 27% -33% of benzene chloride, 12% -18% of fluorinated liquid and 33% -40% of silicone oil, and after stirring and mixing, adding 5% -9% of cross-linking agent, and then performing final stirring action;
The inner wall of the honeycomb hole (5) is fixedly provided with a wave absorbing column (7) so as to realize wave absorbing action on the power supply module (2);
Carbon black bars (10) which are arranged adjacent to the wave-absorbing columns (7) at equal intervals are fixedly arranged on the inner walls of the honeycomb holes (5), and rubber sleeves (11) are fixedly wrapped on the outer surfaces of the carbon black bars (10) and the wave-absorbing columns (7);
The wave-absorbing fiber (12) horizontally penetrating through the carbon black rod (10) is fixedly arranged at the inner top wall of the shell (1);
the inner wall of the shell (1) is coated with a wave-absorbing coating (13), and the interior of the wave-absorbing coating (13) is composed of a micro-carbon coil;
The honeycomb holes (5) are fixedly provided with wave-absorbing balls (8) close to the inner wall of the shell (1) so as to realize the action of increasing the wave-absorbing area;
the surface of the wave-absorbing ball head (8) is provided with a conducting hole (3).
2. The electromagnetic wave attenuation structure of a power transformer according to claim 1, wherein: the support column (9) is fixedly arranged at the inner side wall of the cavity (4), and the support column (9) is made of ferrite.
3. The electromagnetic wave attenuation structure of power transformer according to claim 2, wherein: the outer surface of the support column (9) is fixedly wrapped with a silica gel sleeve.
4. A weakening method of an electromagnetic wave weakening structure of a power transformer according to claim 3, characterized in that: when the power module (2) emits electromagnetic waves, one part of the electromagnetic waves enter the honeycomb holes (5) through the wave absorbing balls and the conducting holes (3), then enter the cavity (4) after being primarily absorbed by the carbon black rod (10), and the other part of the electromagnetic waves enter the cavity (4) after being primarily absorbed by the wave absorbing coating (13) and converted into heat energy through the honeycomb holes (5);
step two, after the electromagnetic wave is primarily absorbed in the step one, the residual electromagnetic wave is secondarily absorbed by the wave absorbing liquid (6) in the cavity (4);
And thirdly, conducting heat energy generated after the wave-absorbing coating (13) absorbs the heat energy through the carbon black rod (10) and then micro-heating the wave-absorbing liquid (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410025927.4A CN117809956B (en) | 2024-01-08 | 2024-01-08 | Electromagnetic wave weakening structure and weakening method of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410025927.4A CN117809956B (en) | 2024-01-08 | 2024-01-08 | Electromagnetic wave weakening structure and weakening method of power transformer |
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| CN117809956A CN117809956A (en) | 2024-04-02 |
| CN117809956B true CN117809956B (en) | 2024-07-23 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207219296U (en) * | 2017-10-16 | 2018-04-10 | 昆山市旺祥泰电子科技有限公司 | A kind of electromagnetic shielding composite material |
| JP2021170614A (en) * | 2020-04-17 | 2021-10-28 | 東北化工株式会社 | Power-resistant radio wave absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4097499B2 (en) * | 2002-10-09 | 2008-06-11 | 横浜ゴム株式会社 | Manufacturing method of radio wave absorber |
| JP4832223B2 (en) * | 2006-09-04 | 2011-12-07 | Ｎｅｃトーキン株式会社 | Radio wave absorber |
| CN105405581A (en) * | 2015-11-28 | 2016-03-16 | 扬州国瑞新能源科技有限公司 | Anti-radiation dry type transformer |
| CN109337114B (en) * | 2018-11-09 | 2021-02-02 | 电子科技大学 | Design and application method of half-wall impregnated honeycomb wave-absorbing material |
| CN211406741U (en) * | 2019-12-10 | 2020-09-01 | 苏州贝芯蜂窝科技有限公司 | EMI shielding honeycomb ventilating board |
| CN117087247B (en) * | 2023-10-18 | 2024-01-12 | 西安远飞航空技术发展有限公司 | Wave-absorbing composite material, preparation method thereof and shielding case |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207219296U (en) * | 2017-10-16 | 2018-04-10 | 昆山市旺祥泰电子科技有限公司 | A kind of electromagnetic shielding composite material |
| JP2021170614A (en) * | 2020-04-17 | 2021-10-28 | 東北化工株式会社 | Power-resistant radio wave absorber |
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