CN217588646U - High-voltage coupling coil - Google Patents
High-voltage coupling coil Download PDFInfo
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- CN217588646U CN217588646U CN202221337254.9U CN202221337254U CN217588646U CN 217588646 U CN217588646 U CN 217588646U CN 202221337254 U CN202221337254 U CN 202221337254U CN 217588646 U CN217588646 U CN 217588646U
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Abstract
A high-voltage coupling coil comprises a first shell and a second shell which are butted, wherein a primary coil and a secondary coil are respectively arranged between the first shell and the second shell, iron cores are respectively arranged on the outer side surfaces of the primary coil and the secondary coil, interlayer positioning blocks are arranged on the peripheries of the primary coil, the secondary coil and the iron cores, epoxy resin is poured in a cavity formed by butting the first shell and the second shell in a vacuum state, gaps between the cavity and each part are filled, and an epoxy resin protective layer is formed; the processed epoxy plate is used as a shell, and the components such as the coil, the iron core and the like are filled in the shell and then the epoxy resin is poured in vacuum, so that the insulation strength is ensured, and the surface cracking of the epoxy resin caused by impact current can be avoided; the shell processed by the epoxy plate can play a role of replacing a casting mold when casting epoxy resin, and is not influenced by the number of the molds and the processing period of the molds when in batch production or product modification.
Description
Technical Field
The utility model belongs to the technical field of the high pressure power transmission and transformation, especially, relate to a high-pressure coupling coil.
Background
The coupling coil is a high-voltage power transmission and transformation device for energy transmission and transformation. In the loop, a capacitor is connected in series with a primary coil of a coupling coil to form an LC oscillation loop, and the DC energy stored in the capacitor is converted into AC oscillation energy and coupled to a secondary coil of the coil, so that efficient and isolated energy transmission is realized.
The coils of the same kind of products are generally wound, and then the coils and related parts are vacuum-cast into a whole by using epoxy resin through a die. The epoxy resin mainly plays a role in insulation and fixed support. The structure has the defects of large leakage inductance, low coupling efficiency and poor impact resistance of epoxy resin. And because of the operating characteristics of the coupling coil, the primary coil needs to bear the short-time impact current of 70-80 kA, and the secondary coil needs to bear the impact current of 20-30 kA. Under such operating conditions, the epoxy resin is very susceptible to cracking resulting in insulation damage. The process period of vacuum casting by adopting epoxy resin is longer, more molds are needed if mass production is needed, the production period of casting molding molds is long, the cost is high, and each mold only can be specific to a specific product.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a high-voltage coupling coil, which reduces the distance between the primary coil and the secondary coil as much as possible on the premise of ensuring the insulation strength, improves the coupling efficiency and reduces the energy transmission loss; the coil with a disc involute structure is adopted, so that the direct current resistance is low, the leakage inductance is small, and the distributed capacitance is small; the disc type iron cores are added on the upper part and the lower part of the coil, so that radio frequency electromagnetic interference caused by short-time large current can be inhibited; the shell processed by the epoxy plate can play a role of replacing a casting mold when casting epoxy resin, and is not influenced by the quantity of the molds and the processing period of the molds when in batch production or product modification.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a high-voltage coupling coil, is including the first casing 1 and the second casing 2 that dock mutually, be equipped with primary coil 3 and secondary coil 4 between first casing 1 and the second casing 2 relatively, primary coil 3 and secondary coil 4 lateral surface are equipped with iron core 5 respectively, and primary coil 3 and secondary coil 4 and iron core 5's periphery are equipped with layer locating piece 6, and epoxy is poured under the vacuum state in the cavity that first casing 1 and second casing 2 dock formation, fills up the clearance between cavity and each spare part, forms epoxy protective layer 8.
The primary coil 3 and the secondary coil 4 are of a pure copper disc type involute structure.
The iron core 5 adopts an annular disc structure.
The first shell 1 and the second shell 2 are processed by FR4 epoxy boards.
The first housing 1 and the second housing 2 are connected through a locking device 7.
The locking device 7 adopts a screw and nut pair.
Compared with the prior art, the beneficial effects of the utility model are as follows.
1. The distance between the primary coil 3 and the secondary coil 4 is reduced, so that the coupling efficiency can be improved, and the energy transmission loss can be reduced.
2. The coil adopting the disc type involute structure is characterized in that: the coil has low direct current resistance, small leakage inductance and small distributed capacitance, and the flat disc shape reduces the skin effect of current under impact large current, and the current tends to be evenly distributed.
3. The disc-type iron cores 5 are additionally arranged on the outer side surfaces of the primary coil 3 and the secondary coil 4, and the iron cores 5 have a magnetic shielding function and can inhibit radio frequency electromagnetic interference caused by short-time large current.
4. FR4 epoxy boards are adopted to be processed as the first shell 1 and the second shell 2, and the components such as the primary coil 3, the secondary coil 4, the iron core 5 and the like are filled in the first shell and then the epoxy resin is poured in vacuum, so that the insulation strength is ensured, and the surface cracking of the epoxy resin caused by impact current can be avoided.
5. The shell processed by the epoxy plate can play a role of replacing a casting mold when casting epoxy resin, and is not influenced by the number of the molds and the processing period of the molds when in batch production or product modification.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a bottom view of the present invention.
Fig. 3 is a plan view of the present invention.
Fig. 4 is a left side view of the present invention.
In the figure: 1. a first housing; 2. a second housing; 3. a primary coil; 4. a secondary coil; 5. an iron core; 6. interlayer positioning blocks; 7. a locking device; 8. and an epoxy resin protective layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 4, a high-voltage coupling coil includes a first housing 1 and a second housing 2 which are butted with each other, a primary coil 3 and a secondary coil 4 are relatively arranged between the first housing 1 and the second housing 2, an iron core 5 is respectively arranged on outer side surfaces of the primary coil 3 and the secondary coil 4, an interlayer positioning block 6 is arranged on peripheries of the primary coil 3, the secondary coil 4 and the iron core 5, epoxy resin is poured in a cavity formed by butting the first housing 1 and the second housing 2 in a vacuum state, and gaps between the cavity and each component are filled to form an epoxy resin protective layer 8.
The primary coil 3 and the secondary coil 4 adopt a pure copper disc type involute structure.
The iron core 5 adopts an annular disc structure.
The first shell 1 and the second shell 2 are processed by FR4 epoxy boards.
The first housing 1 and the second housing 2 are connected through a locking device 7.
The locking device 7 adopts a screw and nut pair.
The first shell 1 and the second shell 2 are processed by an FR4 epoxy board, and the primary coil 3 and the secondary coil 4 are processed into a disc type involute structure by pure copper plates; the iron core 5 is in an annular disc structure and is respectively arranged on the outer side surfaces of the primary coil 3 and the secondary coil 4; interlayer positioning blocks 6 are arranged on the peripheries of the primary coil 3, the secondary coil 4 and the iron core 5, and are used for positioning the positions of internal parts in the cavity; the locking device 7 locks the first shell 1 and the second shell 2; epoxy resin is poured in a vacuum state, the internal cavity is filled, and all parts are cured into a whole, so that the insulation strength is ensured, and the surface cracking of the epoxy resin caused by impact current can be avoided.
Claims (6)
1. A high-voltage coupling coil, comprising a first housing (1) and a second housing (2) which are butted, characterized in that: be equipped with primary coil (3) and secondary coil (4) between first casing (1) and second casing (2) relatively, primary coil (3) and secondary coil (4) lateral surface are equipped with iron core (5) respectively, the periphery of primary coil (3) and secondary coil (4) and iron core (5) is equipped with layer locating piece (6), first casing (1) pours epoxy under vacuum state with the intracavity that second casing (2) butt joint formed, fill up the clearance between cavity and each spare part, form epoxy protective layer (8).
2. A high voltage coupled coil as claimed in claim 1, wherein: the primary coil (3) and the secondary coil (4) adopt a pure copper disc type involute structure.
3. A high voltage coupled coil as claimed in claim 1, wherein: the iron core (5) adopts an annular disc structure.
4. A high voltage coupled coil as claimed in claim 1, wherein: the first shell (1) and the second shell (2) are processed by FR4 epoxy boards.
5. A high voltage coupled coil as claimed in claim 1, wherein: the first shell (1) and the second shell (2) are connected through a locking device (7).
6. The high-voltage coupled coil as claimed in claim 5, wherein: the locking device (7) adopts a screw and nut pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221337254.9U CN217588646U (en) | 2022-05-31 | 2022-05-31 | High-voltage coupling coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221337254.9U CN217588646U (en) | 2022-05-31 | 2022-05-31 | High-voltage coupling coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217588646U true CN217588646U (en) | 2022-10-14 |
Family
ID=83527177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221337254.9U Active CN217588646U (en) | 2022-05-31 | 2022-05-31 | High-voltage coupling coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217588646U (en) |
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2022
- 2022-05-31 CN CN202221337254.9U patent/CN217588646U/en active Active
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