CN111564301A - Electromagnetic shielding structure of transformer - Google Patents
Electromagnetic shielding structure of transformer Download PDFInfo
- Publication number
- CN111564301A CN111564301A CN201910113776.7A CN201910113776A CN111564301A CN 111564301 A CN111564301 A CN 111564301A CN 201910113776 A CN201910113776 A CN 201910113776A CN 111564301 A CN111564301 A CN 111564301A
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- Prior art keywords
- transformer
- insulating
- electromagnetic wave
- metal gasket
- wave shielding
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- 239000002184 metal Substances 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011889 copper foil Substances 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The invention relates to an electromagnetic shielding structure of a transformer, which is mainly characterized in that a coil group of the transformer extends outwards to form a pin electrically connected with a coil, an insulating tape is wound on the outer edge of an iron core, then an electromagnetic wave shielding copper foil is wound on the outer edge of the iron core, the transformer can be accommodated in an accommodating space of an insulating shell, a metal gasket which is in contact with and electrically conducted is arranged at the bottom end of the accommodating space corresponding to the electromagnetic wave shielding copper foil, each pin of the transformer is connected and conducted with each corresponding contact of a circuit substrate, and the metal gasket is in contact with and electrically conducted with a welding surface of a connecting ground wire of the; therefore, the overall assembly can be faster, the overall assembly stability can be improved, the service life of the product can be prolonged, the electromagnetic interference generated by the transformer can be shielded, the condition influencing the operation of the overall circuit can be prevented, and the practical efficiency characteristic can be improved in the overall implementation and use.
Description
Technical Field
The present invention relates to an electromagnetic shielding structure of a transformer, and more particularly, to an electromagnetic shielding structure of a transformer, which can be assembled more quickly, improve the stability of the overall assembly, and prolong the service life of the transformer, thereby shielding the electromagnetic interference generated by the transformer, preventing the electromagnetic interference from affecting the operation of the overall circuit, and increasing the practical performance of the transformer.
Background
Accordingly, it is commonly seen that various transformers are provided in many electronic products, which can perform voltage conversion, circuit isolation, and other operations, and Electromagnetic Interference (EMI) is easily generated during the voltage conversion operation of the transformers, especially when the transformers are used at high frequency, the EMI is more serious, and Electromagnetic radiation affects the layout circuit and electronic components around the circuit; therefore, the transformer is generally grounded to introduce the interference signal into the ground, so as to reduce the electromagnetic interference.
Please refer to the "flyback power conversion system" published in No. M570565 of 21/11/2018, which includes an electrically isolated transformer and a power conversion circuit disposed on a circuit board, wherein a shielding set is disposed between a primary side winding and a secondary side winding of the transformer, the shielding set includes a first shielding layer and a second shielding layer, the secondary side winding is disposed between the first and second shielding layers, and the first and second shielding layers increase leakage inductance to reduce electromagnetic interference during system operation, and the shielding layer has increased leakage inductance, i.e., the transformer with increased size can be still mounted in a packaging case with standard size, thereby increasing the size of an iron core and the winding wire diameter to reduce copper loss, iron loss and temperature, and thus improving energy conversion efficiency. Wherein, an insulating adhesive tape is wound on the outer surface of the iron core group, a copper foil layer is wound on the outer surface of the insulating adhesive tape, one side of the copper foil layer is provided with a grounding wire, and the tail end of the grounding wire is connected to the grounding end of the circuit board.
However, although the aforementioned "flyback power conversion system" can achieve the expected effect of reducing electromagnetic interference by using the grounding wire, it is found in the actual assembly process that the iron core assembly needs to wind the insulating tape on the outer surface before the insulating tape, wind a copper foil layer on the outer surface of the insulating tape, and connect the end of the grounding wire arranged on one side of the copper foil layer to the grounding end of the circuit board, which not only results in very high labor cost in the connection of the grounding wire, but also easily results in breakage if force is applied carelessly during the connection construction process of the grounding wire, and is more troublesome and inconvenient, so that there is still room for improvement in the overall structure design.
Accordingly, the inventor provides an electromagnetic shielding structure of a transformer, which is based on abundant design development and practical manufacturing experience of the related industry for many years, and researches and improves the existing measurement method and defects, so as to achieve the purpose of better practical value.
Disclosure of Invention
The present invention is directed to an electromagnetic shielding structure of a transformer, which not only can be assembled more quickly, but also can improve the stability of the overall assembly, and further can prolong the service life of the product, so as to shield the electromagnetic interference generated by the transformer, prevent the occurrence of the condition affecting the operation of the overall circuit, and increase the practical performance of the overall operation.
The main purpose and the effect of the electromagnetic shielding structure of the transformer are achieved by the following specific technical means:
it mainly includes transformer, insulating casing and circuit base board; wherein:
the transformer is provided with a coil group in an iron core, a pin electrically connected with the coil extends outwards from the coil group, an insulating tape is wound on the outer edge of the iron core, and an electromagnetic wave shielding copper foil is wound outside the insulating tape;
the insulating shell is made of insulating materials, an accommodating space is formed in the insulating shell corresponding to the transformer so that the transformer can be accommodated in the accommodating space, a metal gasket is arranged at the bottom end of the accommodating space corresponding to the electromagnetic wave shielding copper foil of the transformer, the upper end of the metal gasket is in contact with the electromagnetic wave shielding copper foil for electric conduction, and the lower end of the metal gasket is exposed out of the bottom of the insulating shell;
the circuit substrate is provided with a contact corresponding to each pin of the transformer so as to connect and conduct each pin of the transformer with each corresponding contact, and the metal gasket corresponding to the insulating shell on the circuit substrate is provided with a connecting ground wire welding surface so as to enable the lower end of the metal gasket to be in contact with the connecting ground wire welding surface for electric conduction.
The other purpose and effect of the electromagnetic shielding structure of the transformer are achieved by the following specific technical means:
it mainly includes transformer, insulating casing and circuit base board; wherein:
the transformer is provided with a coil group in an iron core, a pin electrically connected with the coil extends outwards from the coil group, an insulating tape is wound on the outer edge of the iron core, and an electromagnetic wave shielding copper foil is wound outside the insulating tape;
the insulating shell is made of insulating materials, an accommodating space is formed in the insulating shell corresponding to the transformer so that the transformer can be accommodated in the accommodating space, a metal gasket is arranged in the accommodating space corresponding to the electromagnetic wave shielding copper foil of the transformer, the metal gasket is in contact with the electromagnetic wave shielding copper foil and is electrically conducted, a metal pin is convexly arranged on the insulating shell in an outward extending mode, and the metal pin is electrically connected with the metal gasket;
the circuit substrate is provided with a hollow part for the corresponding assembly of the insulating shell, contacts are arranged on the circuit substrate corresponding to the pins of the transformer so as to enable the pins of the transformer to be connected and conducted with the corresponding contacts, and a ground wire welding point is arranged on the circuit substrate corresponding to the metal pins of the insulating shell so as to enable the metal pins to be connected and conducted with the ground wire welding point.
In an embodiment of the electromagnetic shielding structure of the transformer according to the present invention, the coil assembly of the transformer is formed by winding a plurality of coils, and an electromagnetic shielding copper wire is wound between two coils.
In an embodiment of the electromagnetic shielding structure of the transformer of the present invention, the coil assembly of the transformer is provided with an insulating tape at an outer edge thereof and between the coil and the electromagnetic wave shielding copper wire.
Drawings
FIG. 1 is a schematic perspective exploded view of the present invention
FIG. 2 is a schematic view of the partially exploded structure of the present invention
FIG. 3 is a schematic sectional view of the present invention
FIG. 4 is a schematic perspective exploded view of another embodiment of the present invention
FIG. 5 is a partially exploded perspective view of another embodiment of the present invention
FIG. 6 is a schematic sectional view of another embodiment of the present invention
Reference numerals:
(1) transformer device
(11) Iron core
(12) Coil assembly
(121) Coil
(122) Electromagnetic wave shielding copper wire
(123) Insulating adhesive tape
(13) Pin
(14) Insulating adhesive tape
(15) Electromagnetic wave shielding copper foil
(2) Insulating housing
(21) Containing space
(22) Metal gasket
(23) Metal pin
(3) Circuit board
(31) Contact point
(32) Ground wire connection welding surface
(33) Hollow-out part
(34) Welding point for connecting ground wire
Detailed Description
To make the technical content, the purpose and the efficacy achieved by the present invention more complete and clear, reference is made to the following detailed description, taken in conjunction with the accompanying drawings and figures, in which:
first, referring to fig. 1, a schematic perspective exploded view of the present invention, fig. 2 a schematic partial perspective exploded view of the present invention, and fig. 3 a schematic combined cross-sectional view of the present invention, the present invention mainly includes a transformer (1), an insulating housing (2), and a circuit substrate (3); wherein:
the transformer (1) is provided with a coil group (12) in an iron core (11), the coil group (12) is formed by winding a plurality of coils (121), an electromagnetic wave shielding copper wire (122) is wound between the two coils (121), insulating tapes (123) can be arranged on the outer edge of the coil group (12) and between the coils (121) and the electromagnetic wave shielding copper wire (122), a pin (13) electrically connected with the coils (121) extends outwards from the coil group (12), an insulating tape (14) is wound on the outer edge of the iron core (11), and an electromagnetic wave shielding copper foil (15) is wound outside the insulating tape (14).
The insulating shell (2) is made of insulating materials, an accommodating space (21) is formed in the insulating shell (2) corresponding to the transformer (1) so that the transformer (1) can be accommodated in the accommodating space (21), a metal gasket (22) is arranged at the bottom end of the accommodating space (21) corresponding to the electromagnetic wave shielding copper foil (15) of the transformer (1), the upper end of the metal gasket (22) can be just contacted with the electromagnetic wave shielding copper foil (15) for electric conduction, and the lower end of the metal gasket (22) is exposed out of the bottom of the insulating shell (2).
The circuit substrate (3) is provided with a contact (31) corresponding to each pin (13) of the transformer (1) so as to connect and conduct each pin (13) of the transformer (1) with each corresponding contact (31), and the metal gasket (22) corresponding to the insulating shell (2) on the circuit substrate (3) is provided with a connecting ground wire welding surface (32) so as to enable the lower end of the metal gasket (22) to be just contacted with the connecting ground wire welding surface (32) for electric conduction.
Therefore, in the operation and use of the present invention, if electromagnetic interference occurs during the voltage conversion operation of the transformer (1), the electromagnetic interference generated can be conducted to the metal gasket (22) of the insulating housing (2) through the electromagnetic shielding copper foil (15) of the iron core (11), and then conducted to the ground through the grounding wire welding surface (32) of the circuit substrate (3) by the metal gasket (22), so as to shield the electromagnetic interference generated by the transformer (1) and prevent the electromagnetic interference from affecting the circuit operation.
In addition, please refer to fig. 4, fig. 5, and fig. 6, which are schematic diagrams of a three-dimensional exploded structure according to another embodiment of the present invention, a schematic diagram of a partially three-dimensional exploded structure according to another embodiment of the present invention, and a schematic diagram of a combined cross-sectional structure according to another embodiment of the present invention, the present invention may also include a metal pin (23) protruding from the insulating housing (2), the metal pin (23) is electrically connected to the metal pad (22) disposed in the accommodating space (21) of the insulating housing (2), the circuit board (3) is formed with a hollow portion (33) corresponding to the insulating housing (2), and a ground connection pad (34) is disposed on the circuit board (3) corresponding to the metal pin (23) of the insulating housing (2); when the transformer is assembled, the transformer (1) is also accommodated in the accommodating space (21) of the insulating shell (2), the electromagnetic shielding copper foil (15) of the transformer (1) is in contact with the metal gasket (22) for electrical conduction, the insulating shell (2) is arranged corresponding to the hollow part (33) of the circuit substrate (3), each pin (13) of the transformer (1) is connected and conducted with each contact (31) corresponding to the circuit substrate (3), the metal pin (23) of the insulating shell (2) is connected and conducted with the connection ground wire welding point (34) on the circuit substrate (3), and the electromagnetic interference generated in the voltage conversion process of the transformer (1) can also be conducted to the metal gasket (22) of the insulating shell (2) by the electromagnetic shielding copper foil (15) of the iron core (11), and then the metal pin (23) electrically connected with the metal gasket (22) is conducted to the grounding wire welding point (34) of the circuit substrate (3) for grounding, so as to shield the electromagnetic interference generated by the transformer (1) and prevent the electromagnetic interference from influencing the circuit operation.
From the above description, it can be seen that the present invention has the following advantages compared with the prior art:
1. the transformer of the invention winds the electromagnetic wave shielding copper wire between the two coils of the coil group, so that the situation that the copper foil is adhered by the common technical means and the operation consumes time and labor due to the miniaturization of the object in the implementation can be avoided.
2. The invention not only can be assembled more quickly on the whole, but also can be simple and convenient, so as to shield the electromagnetic interference generated by the transformer, prevent the occurrence of the condition influencing the operation of the whole circuit and increase the practical efficiency characteristic in the whole application.
Claims (4)
1. The electromagnetic shielding structure of a kind of potential transformer, characterized by, mainly include potential transformer, insulating casing and circuit base plate; wherein:
the transformer is provided with a coil group in an iron core, a pin electrically connected with the coil extends outwards from the coil group, an insulating tape is wound on the outer edge of the iron core, and an electromagnetic wave shielding copper foil is wound outside the insulating tape;
the insulating shell is made of insulating materials, an accommodating space is formed in the insulating shell corresponding to the transformer so that the transformer can be accommodated in the accommodating space, a metal gasket is arranged at the bottom end of the accommodating space corresponding to the electromagnetic wave shielding copper foil of the transformer, the upper end of the metal gasket is in contact with the electromagnetic wave shielding copper foil for electric conduction, and the lower end of the metal gasket is exposed out of the bottom of the insulating shell;
the circuit substrate is provided with a contact corresponding to each pin of the transformer so as to connect and conduct each pin of the transformer with each corresponding contact, and the metal gasket corresponding to the insulating shell on the circuit substrate is provided with a connecting ground wire welding surface so as to enable the lower end of the metal gasket to be in contact with the connecting ground wire welding surface for electric conduction.
2. The electromagnetic shielding structure of a kind of potential transformer, characterized by, mainly include potential transformer, insulating casing and circuit base plate; wherein:
the transformer is provided with a coil group in an iron core, a pin electrically connected with the coil extends outwards from the coil group, an insulating tape is wound on the outer edge of the iron core, and an electromagnetic wave shielding copper foil is wound outside the insulating tape;
the insulating shell is made of insulating materials, an accommodating space is formed in the insulating shell corresponding to the transformer so that the transformer can be accommodated in the accommodating space, a metal gasket is arranged in the accommodating space corresponding to the electromagnetic wave shielding copper foil of the transformer, the metal gasket is in contact with the electromagnetic wave shielding copper foil and is electrically conducted, a metal pin is convexly arranged on the insulating shell in an outward extending mode, and the metal pin is electrically connected with the metal gasket;
the circuit substrate is provided with a hollow part for the corresponding assembly of the insulating shell, contacts are arranged on the circuit substrate corresponding to the pins of the transformer so as to enable the pins of the transformer to be connected and conducted with the corresponding contacts, and a ground wire welding point is arranged on the circuit substrate corresponding to the metal pins of the insulating shell so as to enable the metal pins to be connected and conducted with the ground wire welding point.
3. The electromagnetic shielding structure of transformer according to claim 1 or 2, wherein the coil assembly of the transformer is formed by winding a plurality of coils, and an electromagnetic wave shielding copper wire is wound between two of the coils.
4. The transformer of claim 3, wherein the coil assembly of the transformer has an insulating tape disposed between the outer edge of the coil assembly and the electromagnetic wave shielding copper wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113776.7A CN111564301A (en) | 2019-02-14 | 2019-02-14 | Electromagnetic shielding structure of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113776.7A CN111564301A (en) | 2019-02-14 | 2019-02-14 | Electromagnetic shielding structure of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111564301A true CN111564301A (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910113776.7A Pending CN111564301A (en) | 2019-02-14 | 2019-02-14 | Electromagnetic shielding structure of transformer |
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| Country | Link |
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| CN (1) | CN111564301A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080061915A1 (en) * | 2006-09-11 | 2008-03-13 | Rodney Godbey | Dry-type transformer with shielded core/coil assembly and method of manufacturing the same |
| CN102354964A (en) * | 2011-10-12 | 2012-02-15 | 上海合璧电子元件有限公司 | Surge absorber containing non-solid conductor |
| CN107017724A (en) * | 2017-05-25 | 2017-08-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor |
| CN206834164U (en) * | 2017-06-23 | 2018-01-02 | 苏州日月新半导体有限公司 | Integrated circuit package body |
| CN207302851U (en) * | 2017-09-21 | 2018-05-01 | 昆山普奥电子科技有限公司 | Anti-interference full parcel shielding copper foil transformer |
| CN208368340U (en) * | 2018-03-01 | 2019-01-11 | 王伟杰 | It is electromagnetically shielded transformer |
| CN209266181U (en) * | 2019-02-14 | 2019-08-16 | 模甸科技股份有限公司 | The electromagnetic armouring structure of transformer |
-
2019
- 2019-02-14 CN CN201910113776.7A patent/CN111564301A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080061915A1 (en) * | 2006-09-11 | 2008-03-13 | Rodney Godbey | Dry-type transformer with shielded core/coil assembly and method of manufacturing the same |
| CN102354964A (en) * | 2011-10-12 | 2012-02-15 | 上海合璧电子元件有限公司 | Surge absorber containing non-solid conductor |
| CN107017724A (en) * | 2017-05-25 | 2017-08-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor |
| CN206834164U (en) * | 2017-06-23 | 2018-01-02 | 苏州日月新半导体有限公司 | Integrated circuit package body |
| CN207302851U (en) * | 2017-09-21 | 2018-05-01 | 昆山普奥电子科技有限公司 | Anti-interference full parcel shielding copper foil transformer |
| CN208368340U (en) * | 2018-03-01 | 2019-01-11 | 王伟杰 | It is electromagnetically shielded transformer |
| CN209266181U (en) * | 2019-02-14 | 2019-08-16 | 模甸科技股份有限公司 | The electromagnetic armouring structure of transformer |
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| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200821 |