CN220753212U - Low common mode current transformer - Google Patents
Low common mode current transformer Download PDFInfo
- Publication number
- CN220753212U CN220753212U CN202321556490.4U CN202321556490U CN220753212U CN 220753212 U CN220753212 U CN 220753212U CN 202321556490 U CN202321556490 U CN 202321556490U CN 220753212 U CN220753212 U CN 220753212U
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- Prior art keywords
- copper foil
- coil groove
- ground connection
- heat dissipation
- groove
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000011889 copper foil Substances 0.000 claims abstract description 66
- 230000017525 heat dissipation Effects 0.000 claims abstract description 31
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 53
- 238000001816 cooling Methods 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model provides a low common mode current transformer, which comprises a Chinese character 'Wang' shaped framework, wherein an isolation baffle is integrally arranged in the middle of the Chinese character 'Wang' shaped framework, two sides of the Chinese character 'Wang' shaped framework are separated into a primary coil groove and a secondary coil groove by the isolation baffle, the bottoms of the primary coil groove and the secondary coil groove are wrapped by a notch-shaped shielding copper foil, a loop-shaped heat dissipation copper foil is grounded, a heat conduction copper foil is further arranged on the loop-shaped heat dissipation copper foil in a protruding mode, and the heat conduction copper foil is tightly attached to the bottoms of the primary coil groove or the secondary coil groove and is buried below the notch-shaped shielding copper foil.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a low common mode current transformer.
Background
The transformer for reducing electromagnetic interference in the switching power supply disclosed by the prior art with the publication number of CN207134218U comprises a magnetic core which is inserted into a magnetic core groove of a transformer framework, wherein a shielding copper foil, a primary winding, a primary shielding winding and a secondary winding are sequentially arranged on the transformer framework, a first retaining wall and a second retaining wall which are oppositely arranged and are in buckle connection are also arranged on the transformer framework, the distance between the first retaining wall and the second retaining wall is smaller than the width of the shielding copper foil, through holes are reserved on the shielding copper foil for the pins of the first retaining wall and the second retaining wall to pass through, and the first retaining wall and the second retaining wall are connected to the transformer framework in a clamping manner, so that the transformer is rapid and convenient; the shielding copper foil weakens the parasitic capacitance of the primary winding coil to the magnetic core, so that the generated capacitance to the ground is also reduced; the primary shielding winding is arranged between the primary winding and the secondary winding, so that common mode current between the primary winding and the secondary winding can be effectively restrained, and more effective and stable operation of the switching power supply is ensured.
However, the transformer for reducing electromagnetic interference in the switching power supply still has obvious defects in the use process: the shielding copper foil has single function, can only play a role in inhibiting common mode current between the primary winding and the secondary winding, and has low integration degree.
Disclosure of Invention
The present utility model is directed to a low common mode current transformer to solve the above-mentioned problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a low common mode current transformer, includes the king style of calligraphy skeleton, king style of calligraphy skeleton middle part integration is provided with isolation baffle, isolation baffle separates king style of calligraphy skeleton both sides into primary coil groove and secondary coil groove, primary coil groove and secondary coil groove bottom side parcel are provided with the shape of mouth shielding copper foil, isolation baffle both sides still are attached to be provided with the shape of returning heat dissipation copper foil, shape of returning heat dissipation copper foil ground connection sets up, the last heat conduction copper foil that still stands out of being provided with of shape of returning heat dissipation copper foil, the heat conduction copper foil hugs closely in primary coil groove or secondary coil groove bottom side and buries in shape of mouth shielding copper foil below.
Preferably, the opening type shielding copper foil is attached to the outer surface of the shielding radiating fin, the shielding radiating fin is a sheet type water cooling bag, and the sheet type water cooling bag is wrapped and arranged at the bottoms of the primary coil groove and the secondary coil groove.
Preferably, the thickness H of the sheet type water-cooling bag is less than or equal to 3mm, the sheet type water-cooling bag is wrapped on the inner side of the primary coil groove or the secondary coil groove, a liquid inlet hole and a liquid outlet hole are further formed in the sheet type water-cooling bag, the liquid inlet hole and the liquid outlet hole are respectively communicated with a liquid inlet head and a liquid outlet head which are arranged on the inner side of the primary coil groove or the secondary coil groove, and a water-cooling circulation channel communicated with the liquid inlet head and the liquid outlet head is formed in the king-shaped framework.
Preferably, an S-shaped heat dissipation channel is arranged in the sheet type water cooling bag, and the head end and the tail end of the S-shaped heat dissipation channel are respectively communicated with the liquid inlet holes or the liquid outlet holes.
Preferably, the isolation baffle both sides have seted up the grounding groove respectively, both sides be provided with same ground connection sheetmetal in the grounding groove, the ground connection sheetmetal extends to the outside of king style of calligraphy skeleton through the inside ground connection spliced pole that sets up of king style of calligraphy skeleton, the ground connection spliced pole is connected with the ground wire, be provided with on the heat dissipation copper foil of returning shape with the cooperation of grounding groove and with ground connection sheetmetal electric connection's ground connection cooperation piece.
Preferably, winding coils are wound in the primary coil slot and the secondary coil slot outside the shielding radiating fin.
Preferably, the ground connection post groove has all been seted up to king style of calligraphy skeleton both sides, be provided with the ground connection spliced pole in the ground connection post groove, ground connection spliced pole and homonymy's returns shape heat dissipation copper foil electric connection, the ground connection spliced pole is connected with the ground wire.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, through the arrangement of the mouth-shaped shielding copper foil, on one hand, common mode current in the primary coil and the secondary coil is effectively inhibited, and meanwhile, heat generated in the working process of the transformer can be timely and outwards evacuated.
Drawings
FIG. 1 is a schematic perspective view of the assembled whole structure of the present utility model;
FIG. 2 is an exploded view of the overall structure of the present utility model;
FIG. 3 is a schematic cross-sectional view of the king-shaped skeleton of the present utility model;
FIG. 4 is a schematic view showing an expanded state of a shielding heat sink according to the present utility model;
FIG. 5 is a schematic view of the internal structure of a shielding heat sink according to the present utility model;
fig. 6 is a schematic view of the installation position of the grounding connection post of the present utility model.
In the figure: 1 king-shaped framework, 2 isolation baffle plates, 3 primary coil grooves, 4 secondary coil grooves, 5 shielding radiating fins, 6-shaped radiating copper foil, 7 heat conducting copper foil, 8-mouth shielding copper foil, 9-piece water cooling bag 10 liquid inlet holes, 11 liquid outlet holes, 12 liquid inlet heads, 13 liquid outlet heads, 14 water cooling circulation channels, 15S-shaped heat dissipation channels, 16 grounding grooves, 17 grounding metal sheets, 18 grounding connecting columns and 19 grounding matching blocks.
Detailed Description
The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-6, the present utility model provides a technical solution:
embodiment one:
the utility model provides a low common mode current transformer, including king style of calligraphy skeleton 1, king style of calligraphy skeleton 1 middle part integration is provided with isolation baffle 2, isolation baffle 2 separates king style of calligraphy skeleton 1 both sides into primary coil groove 3 and secondary coil groove 4, primary coil groove 3 and secondary coil groove 4 downside parcel are provided with the mouth shape shielding copper foil 8, isolation baffle 2 both sides still are attached to be provided with the heat dissipation copper foil 6 that returns, the heat dissipation copper foil 6 that returns ground connection setting that returns, still outstanding heat conduction copper foil 7 that is provided with on the heat dissipation copper foil 6 that returns, heat conduction copper foil 7 hugs closely in primary coil groove 3 or secondary coil groove 4 downside and buries in mouth shape shielding copper foil 8 below.
In the embodiment, the mouth-shaped shielding copper foil 8 is wrapped and arranged at the bottom side of the primary coil groove 3 or the secondary coil groove 4, and is used as an inner shielding structure of a winding coil of the transformer on one hand, on the other hand, heat generated in the working process of the transformer is timely and outwards dispersed from the inside, so that the normal working of the transformer is ensured, meanwhile, the heat conducting copper foil 7 is connected and arranged on the square-shaped heat radiating copper foil 6, the heat conducting copper foil 7 is tightly attached to the bottom side of the primary coil groove 3 or the secondary coil groove 4 and buried below the mouth-shaped shielding copper foil 8, the heat generated by the square-shaped heat radiating copper foil 6 and the mouth-shaped shielding copper foil 8 can be outwards dispersed through the hollow structure formed by the king-shaped framework itself, the heat radiation copper foil 6 and the mouth-shaped shielding copper foil 8 are not only used as electromagnetic signal shielding structures, but also used as heat conduction structures in winding coils, common mode current in primary and secondary coils is effectively restrained through the structure, heat generated in the working process of the transformer is timely and outwards dissipated from inside to outside, electromagnetic shielding and heat conduction characteristics of the copper foil are fully utilized, the integration degree of the device is improved, and further, the mouth-shaped shielding copper foil 8 is attached to the outer surface of the shielding radiating fin 5, the shielding radiating fin 5 is a sheet type water cooling bag 9, the thickness H of the sheet type water cooling bag 9 is less than or equal to 3mm, and the sheet type water cooling bag 9 is wrapped on the inner side of the primary coil groove 3 or the secondary coil groove 4.
Embodiment two:
the sheet type water-cooling bag 9 is also provided with a liquid inlet 10 and a liquid outlet 11, the liquid inlet 10 and the liquid outlet 11 are respectively communicated with a liquid inlet 12 and a liquid outlet 13 which are arranged on the inner side of the primary coil groove 3 or the secondary coil groove 4, and a water-cooling circulation channel 14 which is communicated with the liquid inlet 12 and the liquid outlet 13 is arranged in the king-shaped framework 1.
In this embodiment, the sheet type water-cooling bag 9 is provided with a liquid inlet 10 and a liquid outlet 11, the liquid inlet 10 and the liquid outlet 11 are respectively communicated with a liquid inlet 12 and a liquid outlet 13, the liquid inlet 12 and the liquid outlet 13 are also communicated with a water-cooling circulation channel 14, a liquid heat dissipation medium is pumped out from the liquid inlet 12 through the water-cooling circulation channel 14 by an external pump, and finally enters the water-cooling circulation channel 14 again through the liquid inlet 10 and the liquid outlet 11 through the liquid inlet 12 and the liquid outlet 13, so as to realize the in-out circulation of the heat dissipation medium, further, in order to ensure that the heat dissipation medium can circulate uniformly, the sheet type water-cooling bag 9 is provided with an S-shaped heat dissipation channel 15, and the front end and the tail end of the S-shaped heat dissipation channel 15 are respectively communicated with the liquid inlet 10 or the liquid outlet 11.
Embodiment III:
in this embodiment, the two sides of the isolation baffle 2 are respectively provided with a grounding groove 16, the grounding grooves 16 on the two sides are internally provided with the same grounding metal sheet 17, the grounding metal sheet 17 extends to the outside of the inverted-V-shaped framework 1 through a grounding connection column 18 arranged in the inverted-V-shaped framework 1, the grounding connection column 18 is connected with the ground wire, the rectangular heat dissipation copper foil 6 is provided with a grounding matching block 19 which is matched with the grounding groove 16 and is electrically connected with the grounding metal sheet 17, the rectangular heat dissipation copper foil 6 is electrically connected with the grounding connection column 18 through the grounding matching block 19, so that the rectangular heat dissipation copper foils 6 on the two sides are grounded, and the rectangular heat dissipation copper foils 6 are connected to the working surface of the primary side through a shielding layer.
Embodiment four:
in this embodiment, the two sides of the king-shaped skeleton are provided with the grounding post slots 20, the grounding post slots 20 are internally provided with the grounding connecting posts 18, the grounding connecting posts 18 are electrically connected with the same side of the rectangular radiating copper foil 6, the grounding connecting posts 18 are connected with the ground wire, and after the winding coil is installed, the rectangular radiating copper foil 6 is grounded by electrically connecting the grounding connecting posts 18 with the rectangular radiating copper foil 6.
A manufacturing method is used for assembling the low common mode current transformer and comprises the following steps:
step one: the king-shaped framework 1 is integrally formed, then a water cooling circulation channel 14 is formed inside, and a grounding metal sheet 17 and a grounding connecting column 18 are arranged;
step two: the heat-conducting copper foil 7 arranged on the heat-radiating copper foil 6 is tightly attached to the bottom side of the primary coil groove 3 or the secondary coil groove 4;
step three: the liquid inlet holes 10 and the liquid outlet holes 11 of the shielding cooling fins 5 are respectively matched with the liquid inlet head 12 and the liquid outlet head 13, and the shielding cooling fins 5 are wound in the primary coil groove 3 or the secondary coil groove 4, so that the heat conducting copper foil 7 is buried at the bottom side of the shielding cooling fins 5, and meanwhile, the mouth-shaped shielding copper foil 8 arranged on the shielding cooling fins 5 is arranged at one side far away from the heat conducting copper foil 7, and the width of the shielding cooling fins 5 is smaller than the groove width of the primary coil groove 3 or the secondary coil groove 4;
step four: one end of the grounding connecting column 18 extending out of the king-shaped framework 1 is connected to a grounding guide wire, and meanwhile liquid heat dissipation medium is circularly pumped into the shielding heat dissipation fin 5 through the water cooling circulation channel 14 by an external circulating pump.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a low common mode current transformer, includes king style of calligraphy skeleton, king style of calligraphy skeleton middle part integration is provided with isolation baffle, isolation baffle separates king style of calligraphy skeleton both sides into primary coil groove and secondary coil groove, its characterized in that: the primary coil groove and the secondary coil groove bottom side package is provided with the mouth-shaped shielding copper foil, the isolation baffle both sides still are attached to be provided with the shape heat dissipation copper foil that returns, shape heat dissipation copper foil that returns ground connection setting, it is protruding still to be provided with the heat conduction copper foil on the shape heat dissipation copper foil that returns, the heat conduction copper foil hugs closely in primary coil groove or secondary coil groove bottom side and buries in mouth-shaped shielding copper foil below.
2. A low common mode current transformer according to claim 1, wherein: the mouth-shaped shielding copper foil is attached to the outer surface of the shielding radiating fin, the shielding radiating fin is a sheet type water cooling bag, and the sheet type water cooling bag is wrapped and arranged at the bottoms of the primary coil groove and the secondary coil groove.
3. A low common mode current transformer according to claim 2, wherein: the thickness H of the water cooling bag is less than or equal to 3mm, the water cooling bag is wrapped on the inner side of the primary coil groove or the secondary coil groove, a liquid inlet hole and a liquid outlet hole are further formed in the water cooling bag, the liquid inlet hole and the liquid outlet hole are respectively communicated with a liquid inlet head and a liquid outlet head which are arranged on the inner side of the primary coil groove or the secondary coil groove, and a water cooling circulation channel communicated with the liquid inlet head and the liquid outlet head is formed in the king-shaped framework.
4. A low common mode current transformer according to claim 3, wherein: s-shaped heat dissipation channels are arranged in the sheet type water cooling bags, and the head end and the tail end of each S-shaped heat dissipation channel are respectively communicated with the liquid inlet holes or the liquid outlet holes.
5. The low common mode current transformer of claim 4, wherein: the utility model discloses a grounding metal sheet, including isolation baffle, ground connection groove, ground connection connecting column, return bend heat dissipation copper foil, grounding metal sheet, ground connection connecting column and ground connection, the ground connection groove has been seted up respectively to isolation baffle both sides, both sides be provided with same ground connection sheetmetal in the ground connection groove, the ground connection sheetmetal extends to the outside of king style of calligraphy skeleton through the inside ground connection connecting column that sets up of king style of calligraphy skeleton, the ground connection connecting column is connected with the ground connection, be provided with on the return bend heat dissipation copper foil with ground connection groove cooperation and with ground connection sheetmetal electric connection's ground connection cooperation piece.
6. A low common mode current transformer according to claim 5, wherein: winding coils are wound in the primary coil groove and the secondary coil groove at the outer side of the shielding radiating fin.
7. The low common mode current transformer of claim 4, wherein: the grounding column grooves are formed in two sides of the king-shaped framework, the grounding connecting columns are arranged in the grounding column grooves and are electrically connected with the same-side rectangular radiating copper foil, and the grounding connecting columns are connected with the ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556490.4U CN220753212U (en) | 2023-06-19 | 2023-06-19 | Low common mode current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321556490.4U CN220753212U (en) | 2023-06-19 | 2023-06-19 | Low common mode current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220753212U true CN220753212U (en) | 2024-04-09 |
Family
ID=90557480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321556490.4U Active CN220753212U (en) | 2023-06-19 | 2023-06-19 | Low common mode current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220753212U (en) |
-
2023
- 2023-06-19 CN CN202321556490.4U patent/CN220753212U/en active Active
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