CN212084830U - Transformer device - Google Patents
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- CN212084830U CN212084830U CN202020676435.9U CN202020676435U CN212084830U CN 212084830 U CN212084830 U CN 212084830U CN 202020676435 U CN202020676435 U CN 202020676435U CN 212084830 U CN212084830 U CN 212084830U
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- 239000011889 copper foil Substances 0.000 claims description 13
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a transformer, including bobbin, magnetic core, coil pack, shielding layer and terminal. The bobbin is provided with a shaft hole, and the core part of the magnetic core is inserted in the shaft hole. The coil assembly comprises a primary coil and a secondary coil wound on the winding frame, and the shielding layer surrounds the periphery of the magnetic core and the coil assembly. The terminal is arranged on the winding frame and used for connecting the tail ends of the primary coil and the secondary coil. The terminal comprises a grounding terminal, one end of the grounding terminal is electrically connected with the magnetic core, and the other end of the grounding terminal is electrically connected with the shielding layer. The grounding terminal replaces an external wire in the traditional transformer, one end of the grounding terminal is directly electrically connected with the magnetic core, and unnecessary grounding actions such as wire and welding are not needed, so that the mounting process and the product structure are simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a transformer.
Background
The transformer is a basic electronic component, and the main components are a primary coil, a secondary coil and a magnetic core, and the voltage is changed by utilizing the principle of electromagnetic induction, so that the voltage reaches the applicable range of electrical equipment. In order to avoid the electromagnetic interference at the output end of the transformer and the electromagnetic interference generated by the magnetic field generated by the transformer on the external components, a shielding layer is usually added. However, in the process of providing the shielding layer, the process is complicated, the manufacturing cost is high, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
Accordingly, there is a need for a transformer that can avoid electromagnetic interference at the output end, simplify the assembly process, reduce the manufacturing cost, and improve the production efficiency.
A transformer, comprising:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil and a secondary coil wound around the bobbin;
the shielding layer surrounds the periphery of the magnetic core and the coil assembly;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil and the secondary coil; the terminal comprises a grounding terminal, one end of the grounding terminal is electrically connected with the magnetic core, and the other end of the grounding terminal is electrically connected with the shielding layer.
The transformer provided by the scheme at least has the following advantages:
in the transformer, the shielding layers are wound around the outer surfaces of the magnetic core and the coil assembly, and the shielding layers can prevent the magnetic field generated by the transformer from generating electromagnetic interference on external components. Meanwhile, the shielding layer can also introduce current caused by electromagnetic induction into the ground, so that the heating problem of the transformer is further reduced. This scheme has replaced external wire in the traditional transformer through ground terminal, and ground terminal's one end lug connection magnetic core, and the shielding layer is connected to ground terminal's other end electricity, need not to do ground actions such as unnecessary wire, welding again like this, simplifies installation procedure and product structure, reduces manufacturing cost, improves production efficiency to convenient to use.
In one embodiment, the transformer further comprises a conductive adhesive, the bobbin is provided with a mounting hole for mounting the terminal, and one end of the grounding terminal passes through the mounting hole and is electrically connected with the magnetic core through the conductive adhesive.
In one embodiment, the ground terminal is a flat terminal.
A transformer, comprising:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil, a secondary coil and a shield coil wound around the bobbin, the shield coil being disposed between the primary coil and the secondary coil;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil, the secondary coil and the shield coil; wherein the terminal includes a ground terminal, one end of which is electrically connected to the end of the shield coil, and the other end of which is electrically connected to the magnetic core.
In the transformer, the shielding coil is arranged between the primary coil and the secondary coil, the shielding coil is electrically connected with one end of the grounding terminal, and the other end of the grounding terminal is electrically connected with the magnetic core, so that electromagnetic interference from the primary coil can be led into the ground through the shielding coil, and the interference on the output end of the transformer is avoided. And a shielding coil is arranged between the primary coil and the secondary coil, so that the interlayer distance is increased, the interlayer capacitance is reduced, the coupling degree of the primary coil and the secondary coil is reduced, and the leakage inductance is increased. The surface of magnetic core has surrounded the shielding layer, and the shielding layer can avoid the magnetic field that the transformer produced to produce electromagnetic interference to external components and parts. Meanwhile, the shielding layer can also introduce current caused by electromagnetic induction into the ground, so that the heating problem of the transformer is further reduced. Compared with the traditional transformer, the grounding terminal in the embodiment replaces an external wire in the traditional transformer, one end of the grounding terminal is directly electrically connected with the magnetic core, the other end of the grounding terminal is electrically connected with the shielding layer, or the other end of the grounding terminal is electrically connected with the magnetic core and the shielding layer, redundant grounding actions such as wire and welding are not needed, the installation process and the product structure are simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
In one embodiment, the transformer further comprises a conductive adhesive, the bobbin is provided with a mounting hole for mounting the terminal, and one end of the grounding terminal passes through the mounting hole and is electrically connected with the magnetic core through the conductive adhesive.
In one embodiment, the transformer further includes a plurality of short-circuit coils, and the plurality of shield coils have one end electrically connected to the ground terminal through the short-circuit coils.
In one embodiment, the shielding coil is a copper wire, or the shielding coil is a copper foil.
In one embodiment, the ground terminal is a flat terminal.
In one embodiment, the ground terminal is independently connected to one end of the shield coil;
alternatively, a terminal at one end of the primary coil is shared.
A transformer, comprising:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil, a secondary coil and a shield coil wound around the bobbin, the shield coil being disposed between the primary coil and the secondary coil;
the shielding layer surrounds the periphery of the magnetic core and the coil assembly;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil, the secondary coil and the shield coil; the terminal comprises a grounding terminal, one end of the grounding terminal is electrically connected with the tail end of the shielding coil, the other end of the grounding terminal is electrically connected with the shielding layer, or the other end of the grounding terminal is electrically connected with the magnetic core and the shielding layer.
The transformer provided by the scheme at least has the following advantages:
in the transformer, the shielding coil is arranged between the primary coil and the secondary coil, the shielding coil is electrically connected with one end of the grounding terminal, and the other end of the grounding terminal is electrically connected with the magnetic core, so that electromagnetic interference from the primary coil can be led into the ground through the shielding coil, and the interference on the output end of the transformer is avoided. And a shielding coil is arranged between the primary coil and the secondary coil, so that the interlayer distance is increased, the interlayer capacitance is reduced, the coupling degree of the primary coil and the secondary coil is reduced, and the leakage inductance is increased. The surface of magnetic core has surrounded the shielding layer, and the shielding layer can avoid the magnetic field that the transformer produced to produce electromagnetic interference to external components and parts. Meanwhile, the shielding layer can also introduce current caused by electromagnetic induction into the ground, so that the heating problem of the transformer is further reduced. Compared with the traditional transformer, the grounding terminal in the embodiment replaces an external wire in the traditional transformer, one end of the grounding terminal is directly electrically connected with the magnetic core, the other end of the grounding terminal is electrically connected with the shielding layer, or the other end of the grounding terminal is electrically connected with the magnetic core and the shielding layer, redundant grounding actions such as wire and welding are not needed, the installation process and the product structure are simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
In one embodiment, the transformer further comprises a conductive adhesive, the bobbin is provided with a mounting hole for mounting the terminal, and one end of the grounding terminal passes through the mounting hole and is electrically connected with the magnetic core through the conductive adhesive;
or, the conductive adhesive is electrically connected with the shielding layer;
or the conductive adhesive is electrically connected with the magnetic core and the shielding layer.
In one embodiment, the shielding layer is a copper foil shielding layer.
In one embodiment, the transformer further includes a plurality of short-circuit coils, and the plurality of shield coils have one end electrically connected to the ground terminal through the short-circuit coils.
In one embodiment, the shielding coil is a copper wire, or the shielding coil is a copper foil.
In one embodiment, the ground terminal is a flat terminal.
In one embodiment, the ground terminal is independently connected to one end of the shield coil;
alternatively, a terminal at one end of the primary coil is shared.
Drawings
Fig. 1 is a schematic structural diagram of a transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another view angle of the transformer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a coil assembly of a transformer according to an embodiment of the present invention.
Description of reference numerals:
10. the coil comprises a coil frame, 20, a magnetic core, 30, a coil assembly, 31, a primary coil, 32, a secondary coil, 33, a shielding coil, 40, a grounding terminal, 50, conductive adhesive, 60 and a shielding layer.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Referring to fig. 1 and 3, a transformer according to an embodiment includes a bobbin 10, a core 20, a coil assembly 30, a shielding layer 60, and terminals. The bobbin 10 is provided with a shaft hole in which the core portion of the magnetic core 20 is inserted. The coil assembly 30 includes a primary coil 31 and a secondary coil 32 wound around the bobbin 10, and a shield layer 60 surrounds the outer peripheries of the core 20 and the coil assembly 30. Terminals are provided on the bobbin 10 for connecting the ends of the primary coil 31 and the secondary coil 32. The terminal includes a ground terminal 40, one end of the ground terminal 40 is electrically connected to the magnetic core 20, and the other end of the ground terminal 40 is electrically connected to the shielding layer 60.
In the transformer, the shielding layer 60 is wound around the outer surfaces of the magnetic core 20 and the coil assembly 30, and the shielding layer 60 can prevent the magnetic field generated by the transformer from generating electromagnetic interference on external components. Meanwhile, the shielding layer 60 can also introduce the current caused by electromagnetic induction to the ground, thereby further reducing the heat generation problem of the transformer. According to the scheme, the grounding terminal 40 replaces an external wire in a traditional transformer, one end of the grounding terminal 40 is directly electrically connected with the magnetic core 20, and the other end of the grounding terminal 40 is electrically connected with the shielding layer 60, so that redundant grounding actions such as wires and welding are not needed, the installation process and the product structure are simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
Referring to fig. 1 and 3, another embodiment of a transformer includes a bobbin 10, a core 20, a coil assembly 30, and terminals. The bobbin 10 is provided with a shaft hole in which the core portion of the magnetic core 20 is inserted. The coil assembly 30 includes a primary coil 31, a secondary coil 32, and a shield coil 33 wound around the bobbin 10, and the shield coil 33 is provided between the primary coil 31 and the secondary coil 32. Terminals are provided on the bobbin 10 for connecting the ends of the primary coil 31, the secondary coil 32, and the shield coil 33. The terminal includes a ground terminal 40, one end of the ground terminal 40 is electrically connected to the end of the shield coil 33, and the other end of the ground terminal 40 is electrically connected to the magnetic core 20.
In the transformer, the shielding coil 33 is disposed between the primary coil 31 and the secondary coil 32, the end of the shielding coil 33 is electrically connected to one end of the grounding terminal 40, and the other end of the grounding terminal 40 is electrically connected to the magnetic core 20, so that electromagnetic interference from the primary coil 31 can be conducted to the ground through the shielding coil 33, thereby avoiding electromagnetic interference to the output end of the transformer. Further, a shield coil 33 is provided between the primary coil 31 and the secondary coil 32 to increase the interlayer distance, reduce the interlayer capacitance, reduce the degree of coupling between the primary coil 31 and the secondary coil 32, and increase the leakage inductance. Compared with the traditional transformer, the grounding terminal 40 replaces an external lead in the traditional transformer, one end of the grounding terminal 40 is electrically connected with the tail end of the shielding coil 33, the other end of the grounding terminal 40 is directly electrically connected with the magnetic core 20, and unnecessary grounding actions such as lead and welding are not needed, so that the mounting process and the product structure can be simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
It should be noted that, referring to fig. 3, the primary coil 31 is located at the outermost layer of the coil assembly 30, the secondary coil 32 is located at the innermost layer of the coil assembly 30, and the primary coil 31 clamps the secondary coil 32 for better coupling; the shield coil 33 is provided between the primary coil 31 and the secondary coil 32. When the transformer is used, the primary coils 31 are connected in series to form a whole body for use.
Referring to fig. 1 and 3, another embodiment of a transformer includes a bobbin 10, a core 20, a coil assembly 30, terminals, and a shielding layer 60. The bobbin 10 is provided with a shaft hole, the core portion of the magnetic core 20 is inserted into the shaft hole, and the shielding layer 60 surrounds the outer surface of the magnetic core 20. The coil assembly 30 includes a primary coil 31, a secondary coil 32, and a shield coil 33 wound around the bobbin 10, and the shield coil 33 is provided between the primary coil 31 and the secondary coil 32. Terminals are provided on the bobbin 10 for connecting the ends of the primary coil 31, the secondary coil 32, and the shield coil 33. The terminal comprises a grounding terminal 40, one end of the grounding terminal 40 is electrically connected with the tail end of the shielding coil 33, and the other end of the grounding terminal 40 is electrically connected with the shielding layer 60; alternatively, the other end of the ground terminal 40 is electrically connected to the magnetic core 20; alternatively, the other end of the ground terminal 40 is electrically connected to both the magnetic core 20 and the shield layer 60.
The shielding layer 60 is disposed around the outer peripheries of the magnetic core 20 and the coil assembly 30, and the shielding layer 60 can prevent the magnetic field generated by the transformer from generating electromagnetic interference with the external component. Meanwhile, the shielding layer 60 can also introduce the current caused by electromagnetic induction to the ground, thereby further reducing the heat generation problem of the transformer. A shielding coil 33 is arranged between the primary coil 31 and the secondary coil 32, the shielding coil 33 is electrically connected with one end of a grounding terminal 40, and the other end of the grounding terminal 40 is electrically connected with the magnetic core 20, so that current interference generated by the primary coil 31 can be led to the ground through the shielding coil 33, and the interference on the output end of the transformer or the secondary coil 32 is avoided. Further, a shield coil 33 is provided between the primary coil 31 and the secondary coil 32 to increase the interlayer distance, reduce the interlayer capacitance, reduce the degree of coupling between the primary coil 31 and the secondary coil 32, and increase the leakage inductance.
Compared with the conventional transformer, the grounding terminal 40 in the embodiment replaces an external lead in the conventional transformer, one end of the grounding terminal 40 is directly electrically connected with the magnetic core 20, the other end of the grounding terminal 40 is electrically connected with the shielding layer 60, and/or the other end of the grounding terminal 40 is electrically connected with the magnetic core 20, so that redundant grounding actions such as lead and welding are not needed, the installation process and the product structure are simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
In one embodiment, the magnetic core 20 may be any one of an EE magnetic core, an EP magnetic core, and an EI magnetic core.
In one embodiment, referring to fig. 1 and 2, the transformer further includes a conductive adhesive 50, the bobbin 10 is provided with a mounting hole for mounting a terminal, and one end of the ground terminal 40 passes through the mounting hole and is electrically connected to the magnetic core 20 through the conductive adhesive 50. It should be noted that the ground terminal 40 is mounted to the bobbin 10, one end of the ground terminal 40 passes through the mounting hole, and one end of the ground terminal 40 is close to the magnetic core 20, so that the one end of the ground terminal 40 is electrically connected to the magnetic core 20 through the conductive paste 50. The bobbin 10 is provided with a mounting hole for mounting a terminal, one end of the ground terminal 40 passes through the mounting hole and is electrically connected to the magnetic core 20 through the conductive adhesive 50, so that unnecessary grounding actions such as external wires and welding are not required, the mounting process and the product structure can be simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
In addition, the ground terminal 40 is mounted on the bobbin 10, one end of the ground terminal 40 penetrates through the mounting hole, and the ground terminal 40 is designed to be as close to the ground terminal 40 as possible in the design process, so that the conductive adhesive 50 can be conveniently dispensed, the using amount is saved, and the production efficiency is improved. Meanwhile, the occurrence of poor contact can be avoided, which is beneficial to improving the reliability of the grounding terminal 40 and the performance of the whole structure.
It is understood that since the matrix resin of the conductive paste 50 is an adhesive, an appropriate curing temperature may be selected to bond one end of the ground terminal 40 to the magnetic core 20. Meanwhile, the traditional mode of welding the grounding terminal by the external lead is replaced by the mode of utilizing the conductive adhesive 50 and the grounding terminal 40, so that complicated flying leads are avoided, an additional adhesive tape is not needed to protect the external lead, and the transformer can be developed towards miniaturization, microminiaturization and high integration. In addition, the conductive adhesive 50 has a simple process, is easy to operate, can improve the production efficiency, and is an ideal choice for realizing conductive connection instead of welding.
In one embodiment, the shielding layer 60 is a copper foil shielding layer. It can be understood that the copper foil has low surface oxygen property, the surface thereof can be attached to various substrates, and the temperature use range of the copper foil is wide. The copper foil has electromagnetic shielding and antistatic properties, and is wound on the outer surface of the magnetic core 20, so that the copper foil can prevent the magnetic field generated by the transformer from generating electromagnetic interference on external components. Meanwhile, the copper foil can also introduce current caused by electromagnetic induction to the ground, so that the heating problem of the transformer is further reduced. Of course, in other embodiments, the shielding layer 60 may be an aluminum foil shielding layer.
In one embodiment, the transformer further includes a short-circuit coil, the shielding coil 33 is provided in plurality, and ends of the plurality of shielding coils 33 are electrically connected to the ground terminal 40 through the short-circuit coil. It can be understood that the ends of the plurality of shield coils 33 are electrically connected to one end of the short-circuit coil in advance, and the other end of the short-circuit coil is electrically connected to one end of the ground terminal 40, so that all grounding requirements can be met by welding only one place, the installation procedure is simplified, the production efficiency is improved, and the use is convenient.
In one embodiment, the shield coil 33 is a copper wire. Adopt the shield coil 33 that the copper line was made, it is more nimble to use, is convenient for example set up the starting point, the terminal point, the winding direction etc. of shield coil 33 according to the demand of shielding effect, is also convenient for adjust the number of turns. Moreover, the shielding coil 33 made of copper wire has low cost and is easy to be produced automatically; when the electromagnetic interference is tested, the consistency effect of the product produced when the copper wire is shielded is good. Of course, in other embodiments, the shield coil 33 may also be a copper foil.
In one embodiment, the ground terminal 40 is a flat terminal. Compared with the round terminal pin, the contact area between the flat ground terminal 40 and the shielding coil 33, and/or between the flat ground terminal 40 and the magnetic core 20, and/or between the flat ground terminal 40 and the shielding layer 60 is larger, so that the sufficient welding between the ground terminal 40 and the tail end of the shielding coil 33, and/or between the ground terminal 40 and the magnetic core 20, and/or between the ground terminal 40 and the shielding layer 60 can be ensured, and the reliability when a large current is passed can be further ensured.
In one embodiment, the ground terminal 40 is independently connected to one end of the shield coil 33. By electrically connecting the ground terminal 40 to the end of the shield coil 33 independently, the other end of the ground terminal 40 is electrically connected to the magnetic core 20, so that electromagnetic interference from the primary coil 31 can be conducted to the ground through the shield coil 33, thereby avoiding electromagnetic interference to the output terminal of the transformer. Further, a shield coil 33 is provided between the primary coil 31 and the secondary coil 32 to increase the interlayer distance, reduce the interlayer capacitance, reduce the degree of coupling between the primary coil 31 and the secondary coil 32, and increase the leakage inductance. Compared with the traditional transformer, the grounding terminal 40 replaces a wire in the traditional transformer, one end of the grounding terminal 40 is electrically connected with the shielding coil 33, the other end of the grounding terminal 40 is directly electrically connected with the magnetic core 20, and unnecessary grounding actions such as external wires and welding are not needed, so that the mounting process and the product structure can be simplified, the manufacturing cost is reduced, the production efficiency is improved, and the use is convenient.
In another embodiment, the ground terminal 40 is shared with a terminal connected to one end of the primary coil 31, which facilitates installation and reduces cost.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (16)
1. A transformer, characterized in that the transformer comprises:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil and a secondary coil wound around the bobbin;
the shielding layer surrounds the periphery of the magnetic core and the coil assembly;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil and the secondary coil; the terminal comprises a grounding terminal, one end of the grounding terminal is electrically connected with the magnetic core, and the other end of the grounding terminal is electrically connected with the shielding layer.
2. The transformer of claim 1, further comprising a conductive adhesive, wherein the bobbin is provided with a mounting hole for mounting the terminal, and one end of the ground terminal passes through the mounting hole and is electrically connected to the core through the conductive adhesive.
3. The transformer of claim 1, wherein the ground terminal is a flat terminal.
4. A transformer, characterized in that the transformer comprises:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil, a secondary coil and a shield coil wound around the bobbin, the shield coil being disposed between the primary coil and the secondary coil;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil, the secondary coil and the shield coil; wherein the terminal includes a ground terminal, one end of which is electrically connected to the end of the shield coil, and the other end of which is electrically connected to the magnetic core.
5. The transformer of claim 4, further comprising a conductive adhesive, wherein the bobbin is provided with a mounting hole for mounting the terminal, and one end of the ground terminal passes through the mounting hole and is electrically connected to the core through the conductive adhesive.
6. The transformer according to claim 4, further comprising a short-circuiting coil, wherein the shield coil is provided in plurality, and one end of the plurality of shield coils is electrically connected to the ground terminal through the short-circuiting coil.
7. The transformer of claim 4, wherein the shield coil is a copper wire or the shield coil is a copper foil.
8. The transformer of claim 4, wherein the ground terminal is a flat terminal.
9. The transformer of claim 4, wherein the ground terminal is independently connected to one end of the shield coil;
alternatively, a terminal at one end of the primary coil is shared.
10. A transformer, characterized in that the transformer comprises:
the winding frame is provided with a shaft hole;
the core part of the magnetic core is inserted into the shaft hole;
a coil assembly including a primary coil, a secondary coil and a shield coil wound around the bobbin, the shield coil being disposed between the primary coil and the secondary coil;
the shielding layer surrounds the periphery of the magnetic core and the coil assembly;
a terminal provided on the bobbin, the terminal being used for connecting the ends of the primary coil, the secondary coil and the shield coil; the terminal comprises a grounding terminal, one end of the grounding terminal is electrically connected with the tail end of the shielding coil, the other end of the grounding terminal is electrically connected with the shielding layer, or the other end of the grounding terminal is electrically connected with the magnetic core and the shielding layer.
11. The transformer of claim 10, further comprising a conductive adhesive, wherein the bobbin is provided with a mounting hole for mounting the terminal, and one end of the ground terminal passes through the mounting hole and is electrically connected to the magnetic core through the conductive adhesive;
or, the conductive adhesive is electrically connected with the shielding layer;
or the conductive adhesive is electrically connected with the magnetic core and the shielding layer.
12. The transformer of claim 10, wherein the shield layer is a copper foil shield layer.
13. The transformer of claim 10, further comprising a short-circuiting coil, wherein the shield coil is provided in plurality, and one end of the plurality of shield coils is electrically connected to the ground terminal through the short-circuiting coil.
14. The transformer of claim 10, wherein the shield coil is a copper wire or the shield coil is a copper foil.
15. The transformer of claim 10, wherein the ground terminal is a flat terminal.
16. The transformer of claim 10, wherein the ground terminal is independently connected to one end of the shield coil;
alternatively, a terminal at one end of the primary coil is shared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020676435.9U CN212084830U (en) | 2020-04-28 | 2020-04-28 | Transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020676435.9U CN212084830U (en) | 2020-04-28 | 2020-04-28 | Transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212084830U true CN212084830U (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020676435.9U Expired - Fee Related CN212084830U (en) | 2020-04-28 | 2020-04-28 | Transformer device |
Country Status (1)
| Country | Link |
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| CN (1) | CN212084830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345695A (en) * | 2021-04-20 | 2021-09-03 | 广东力王高新科技股份有限公司 | Transformer and winding method thereof |
-
2020
- 2020-04-28 CN CN202020676435.9U patent/CN212084830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345695A (en) * | 2021-04-20 | 2021-09-03 | 广东力王高新科技股份有限公司 | Transformer and winding method thereof |
| CN113345695B (en) * | 2021-04-20 | 2022-05-27 | 广东力王高新科技股份有限公司 | Transformer and winding method thereof |
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