CN212750593U - Ultrahigh voltage isolation type transformer - Google Patents
Ultrahigh voltage isolation type transformer Download PDFInfo
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- CN212750593U CN212750593U CN202022256624.3U CN202022256624U CN212750593U CN 212750593 U CN212750593 U CN 212750593U CN 202022256624 U CN202022256624 U CN 202022256624U CN 212750593 U CN212750593 U CN 212750593U
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Abstract
An extra-high voltage isolated transformer comprises magnetic sheets, a primary coil and a secondary coil; the magnetic sheets are arranged in a plurality of numbers, comprise an upper magnetic sheet, a lower magnetic sheet and four side magnetic sheets, and are fixedly connected to form a closed rectangular container; the magnetic sheet is characterized in that one side, opposite to the upper magnetic sheet and the lower magnetic sheet, of the upper magnetic sheet is fixedly connected with a primary coil and a secondary coil respectively, and the primary coil and the secondary coil are separated by a certain distance and are insulated. The utility model can shield the outward magnetic radiation of the coil through the enclosed rectangular container composed of a plurality of magnetic sheets; the safety of the transformer is improved; the primary coil and the secondary coil are wound into a cake shape and fixed on the magnetic sheet, and then vacuum isolation is carried out, or isolation is carried out by 1-5 cm through an insulating material, and the isolation voltage of the primary coil and the secondary coil in the transformer is improved by controlling the spacing distance between the primary coil and the secondary coil.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to superhigh pressure isolated transformer.
Background
Transformers are a basic component of electrical equipment. The primary coil and the secondary coil of the transformer generate electromagnetic induction through the iron core group to convert voltage. The design of the transformer must meet the requirements of electrical safety.
The conventional transformer includes a bobbin, a primary coil, a secondary coil, and a core assembly. The primary coil and the secondary coil are wound on the bobbin. The outermost face of the primary coil and the outermost face of the secondary coil are further covered with an adhesive tape. The shaft portion and the outer ring portion of the core group are located inside the bobbin and outside the bobbin, respectively.
In the conventional transformer, the conventional isolation requirement is that the primary coil and the secondary coil are isolated by 4000V, and in a special occasion, when the primary coil and the secondary coil of the transformer need to be isolated by 1 to 5 ten thousand V, the conventional transformer structure cannot meet the requirement.
In addition, when the conventional transformer is used, the heat generated by the primary coil and the secondary coil of the conventional transformer must be dissipated to avoid affecting the efficiency of the transformer for converting voltage. But the existing transformer has poor heat dissipation effect.
Disclosure of Invention
Aiming at the technical problem, the technical scheme provides the ultrahigh voltage isolation type transformer which can effectively solve the problem.
The utility model discloses a following technical scheme realizes:
an extra-high voltage isolated transformer comprises magnetic sheets, a primary coil and a secondary coil; the magnetic sheets are arranged in a plurality of numbers, comprise an upper magnetic sheet, a lower magnetic sheet and four side magnetic sheets, and are fixedly connected to form a closed rectangular container; the magnetic sheet is characterized in that one side, opposite to the upper magnetic sheet and the lower magnetic sheet, of the upper magnetic sheet is fixedly connected with a primary coil and a secondary coil respectively, and the primary coil and the secondary coil are separated by a certain distance and are insulated.
Furthermore, the interval between the primary coil and the secondary coil is 1-5 cm.
Furthermore, the primary coil and the secondary coil are wound into a pancake coil by adopting a high-frequency excitation wire and are fixed on the surface layer of the magnetic sheet.
Furthermore, an insulating plate is arranged between the primary coil and the secondary coil and between the upper magnetic sheet and the lower magnetic sheet.
Furthermore, the primary coil and the secondary coil are wound into a pancake coil by adopting a high-frequency excitation wire and are fixed on the surface layer of the insulating plate, or are fixed on the insulating plate in an embedded mode.
Furthermore, the high-frequency excitation wire is formed by twisting a plurality of enameled wires into a wire, and the outer sides of the enameled wires are wrapped with high-voltage films and/or outer wrapping wires or extruded silica gel layers.
Furthermore, in the rectangular container formed by the magnetic sheets, the space between the primary coil and the secondary coil is in a vacuum state, so that the insulating effect is achieved.
Furthermore, an insulating medium is arranged between the primary coil and the secondary coil in the rectangular container formed by the magnetic sheets.
Furthermore, the insulating medium is silica gel, epoxy resin glue or other insulating glue.
Furthermore, a cooling pipe is fixedly installed in the insulating medium, and one end of the cooling pipe is connected with a cooling device to provide cold water or cold air for the cooling pipe.
Furthermore, the magnetic sheet is a ferrite magnetic sheet.
Further, the outside of magnetic sheet is provided with fixing device, fixing device including setting up at last magnetic sheet and the silica gel layer of keeping away from one side each other of lower magnetic sheet to and set up the aluminum plate in the silica gel layer outside, go up through fastener fixed connection between aluminum plate and the lower aluminum plate.
Furthermore, the lower aluminum plate is fixedly connected with a base for fixing the transformer to an external object through a fastener.
Advantageous effects
The utility model provides a pair of superhigh pressure isolated transformer compares with prior art, and it has following beneficial effect:
(1) according to the technical scheme, the closed rectangular container body consisting of the magnetic sheets can shield the outward magnetic radiation of the coil; the safety of the transformer is improved; the primary coil and the secondary coil are wound into a cake shape and fixed on the magnetic sheet, and then vacuum isolation is carried out, or isolation is carried out by 1-5 cm through an insulating material, and the isolation voltage of the primary coil and the secondary coil in the transformer is improved by controlling the spacing distance between the primary coil and the secondary coil.
(2) In the technical scheme, the insulating plate is additionally arranged between the primary coil and the secondary coil and between the upper magnetic sheet and the lower magnetic sheet, and has the function of high temperature resistance; and when the isolation voltage increases, the phenomenon that the coil and the magnetic sheet are mutually discharged to cause breakdown is effectively avoided.
(3) This technical scheme sets up the recess on the insulation board for the coil has the interval when the coiling, can effectual increase the resistance to pressure between the line.
(4) The technical scheme adopts the high-frequency excitation wire to be wound into the wire cake, so that the skin effect can be effectively solved when the transformer works, and the heat productivity is reduced in a high-frequency circuit.
(5) According to the technical scheme, the insulating medium in the primary coil and the secondary coil is selected from silica gel, so that the stability of the transformer can be improved, and the transformer is high in heat conductivity and high in heat dissipation performance; and then the heat generated by the transformer during working is taken away through the cooling pipe arranged in the silica gel or the insulating medium, so that the effect of cooling the transformer is achieved.
Drawings
Fig. 1 is a schematic cross-sectional view of embodiment 1 of the present invention.
Fig. 2 is a plan view of embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional view of the adhesive fixation in embodiment 2 of the present invention.
Fig. 4 is a schematic cross-sectional view of the embedded fixture in embodiment 2 of the present invention.
Fig. 5 is a schematic cross-sectional view of the insulating plate at the time of embedded fixation in example 2.
Fig. 6 is a schematic cross-sectional view of embodiment 3 of the present invention.
Reference symbols in the drawings: 1-aluminum plate, 2-silica gel layer, 3-upper magnetic sheet, 4-insulating plate, 5-primary coil, 6-insulating layer, 7-secondary coil, 8-lower magnetic sheet, 9-side magnetic sheet, 10-cooling tube, 11-fastening device and 12-base.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some, but not all embodiments of the invention. Under the prerequisite that does not deviate from the design concept of the utility model, the ordinary person in the art should fall into the protection scope of the utility model to the various changes and improvements that the technical scheme of the utility model made.
Example 1:
as shown in fig. 1-2; an extra-high voltage isolated transformer comprises magnetic sheets, a primary coil 5 and a secondary coil 7; the magnetic sheets are provided with a plurality of magnetic sheets, and comprise an upper magnetic sheet 3, a lower magnetic sheet 8 and four side magnetic sheets 9 which are fixedly connected to form a closed rectangular container; in the present embodiment, the magnetic sheet is a ferrite magnetic sheet.
The primary coil 5 and the secondary coil 7 are fixedly connected to the opposite sides of the upper magnetic sheet 3 and the lower magnetic sheet 8 through adhesive respectively, the primary coil 5 and the secondary coil 7 are wound into a pancake coil by adopting a high-frequency excitation wire and fixed on the surface layer of the magnetic sheet, and the pancake coils are fixedly connected into a whole through adhesive. The high-frequency excitation wire is formed by twisting a plurality of enameled wires into a lead, and the outer sides of the enameled wires are wrapped with high-pressure films and/or outer wrapping wires or extruded silica gel layers.
The primary coil 5 and the secondary coil 7 are separated by a certain distance and are insulated; the larger the separation distance, the higher the resistance to pressure between the primary coil 5 and the secondary coil 7; in contrast, the volumes of the primary coil 5 and the secondary coil 7 are increased. Conventionally, the separation distance is 1-5 cm, and the primary coil 5 and the secondary coil 7 of the transformer are isolated by 1-5 ten thousand V.
The primary coil 5 and the secondary coil 7 are insulated by vacuum insulation or any insulating medium is injected into the space of the primary coil and the secondary coil; such as epoxy glue, plastic, silica gel, etc.; in the optimized embodiment, silica gel is selected as an insulating medium; the silica gel has strong insulativity and high stability, and can be used as an insulating medium to increase the stability of the transformer in the later period; moreover, the silica gel has strong heat conductivity, and can radiate the heat of the primary coil and the secondary coil as fast as possible.
The outside that is located the magnetic sheet is provided with fixing device, fixing device including setting up at last magnetic sheet 3 and the silica gel layer 2 of keeping away from one side each other of lower magnetic sheet 8 to and set up at the aluminum plate 1 in the silica gel layer 2 outside, go up aluminum plate 1 and pass through 11 fixed connection of fastener between the aluminum plate 1 down. A base 12 for fixing the transformer to an external object is fixedly connected to the lower aluminum plate 1 through a fastener.
Example 2:
the inventor uses the embodiment 1, and finds that when the isolation voltage is lower and the isolation voltage is within 100V, the primary coil or the high-grade coil can be directly fixed on the magnetic sheet; however, when the isolation voltage is increased and the current is also large, the primary coil and the secondary coil are easy to generate heat; so that the coil and the magnetic sheet are discharged to each other, resulting in a breakdown state.
In order to solve this problem, the inventors provided an insulating plate 4 between the primary coil 5 and the secondary coil 7 and the upper and lower magnet pieces 3 and 8; the insulating plate 4 can be made of nylon plate, epoxy plate, or any other high-temperature resistant insulating plate material.
The primary coil 5 and the secondary coil 7 are wound into a pancake coil by adopting a high-frequency excitation wire and are directly fixed on the surface layer of the insulating plate 4 through glue. As shown in fig. 3.
Alternatively, a groove may be engraved in the insulating plate 4, and the coil may be wound along the groove to be embedded and fixed on the insulating plate 4. As shown in fig. 4-5.
When the coil is embedded and fixed on the insulating plate 4, the coil has intervals during winding, and the pressure resistance between the wires can be effectively increased.
Other structures of this embodiment, and the positional relationship and the connection relationship between the structures are the same as those of embodiment 1, and will not be described in detail.
Example 3:
in order to enable the transformer to have a further heat dissipation effect, the inventor further improves the transformer on the basis of the embodiments 1 and 2, so that the heat dissipation effect of the transformer is better.
As shown in fig. 5, a cooling pipe 10 is fixedly installed in an insulating medium between the primary coil 5 and the secondary coil 7, and a cooling device, such as cooling water or a cold air device, is connected to one end of the cooling pipe 10 to supply cold water or cold air into the cooling pipe.
Further quickening up and taking away the heat that the transformer produced when working, play the effect of cooling down for the transformer more fast.
Claims (10)
1. An extra-high voltage isolated transformer comprises magnetic sheets, a primary coil (5) and a secondary coil (7); the method is characterized in that: the magnetic sheets are provided with a plurality of magnetic sheets, and comprise an upper magnetic sheet (3), a lower magnetic sheet (8) and four side magnetic sheets (9), which are fixedly connected to form a closed rectangular container; go up magnetic sheet (3) and lower magnetic sheet (8) relative one side respectively fixedly connected with primary coil (5) and secondary coil (7), primary coil (5) and secondary coil (7) between certain distance of interval and insulating.
2. The extra-high voltage isolated transformer of claim 1, wherein: the primary coil (5) and the secondary coil (7) are wound into a pie-shaped coil by adopting a high-frequency excitation wire and are fixed on the surface layer of the magnetic sheet.
3. The extra-high voltage isolated transformer of claim 1, wherein: and an insulating plate (4) is arranged between the primary coil (5) and the secondary coil (7) and between the upper magnetic sheet (3) and the lower magnetic sheet (8).
4. A uhp isolated transformer according to claim 3 wherein: the primary coil (5) and the secondary coil (7) are wound into a cake-shaped coil by adopting a high-frequency excitation wire and are fixed on the surface layer of the insulating plate (4) or are fixed on the insulating plate (4) in an embedded manner.
5. An extra-high voltage isolated transformer according to claim 2 or 4, wherein: the high-frequency excitation wire is formed by twisting a plurality of enameled wires into a wire, and the outer sides of the enameled wires are wrapped with high-voltage films and/or outer wrapping wires or extruded silica gel layers.
6. The extra-high voltage isolated transformer of claim 5, wherein: in a rectangular container formed by the magnetic sheets, a vacuum state is formed between the primary coil (5) and the secondary coil (7), and an insulation effect is achieved.
7. The extra-high voltage isolated transformer of claim 5, wherein: and an insulating medium is arranged between the primary coil (5) and the secondary coil (7) in a rectangular container formed by the magnetic sheets.
8. The extra-high voltage isolated transformer of claim 7, wherein: the insulating medium adopts silica gel, epoxy resin glue or other insulating glue.
9. An extra-high voltage isolated transformer according to claim 7 or 8, wherein: the insulation medium is fixedly provided with a cooling pipe (10), and one end of the cooling pipe (10) is connected with a cooling device to provide cold water or cold air for the cooling pipe.
10. The extra-high voltage isolated transformer of claim 1, wherein: the magnetic sheet is ferrite magnetic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256624.3U CN212750593U8 (en) | 2020-10-12 | 2020-10-12 | Ultrahigh voltage isolation type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256624.3U CN212750593U8 (en) | 2020-10-12 | 2020-10-12 | Ultrahigh voltage isolation type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN212750593U true CN212750593U (en) | 2021-03-19 |
| CN212750593U8 CN212750593U8 (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022256624.3U Active CN212750593U8 (en) | 2020-10-12 | 2020-10-12 | Ultrahigh voltage isolation type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212750593U8 (en) |
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2020
- 2020-10-12 CN CN202022256624.3U patent/CN212750593U8/en active Active
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| CN212750593U8 (en) | 2021-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Address Correct: 223837 No 27 Wangdong Group Cangji village Cangji Town Sucheng District Suqian City Jiangsu Province False: No 27 Wangdong Group Cangji village Cangji Town Sucheng District Huai'an City Jiangsu Province Number: 12-02 Volume: 37 Correction item: Address Correct: 223837 No 27 Wangdong Group Cangji village Cangji Town Sucheng District Suqian City Jiangsu Province False: No 27 Wangdong Group Cangji village Cangji Town Sucheng District Huai'an City Jiangsu Province Number: 12-02 Page: The title page Volume: 37 |
|
| CU01 | Correction of utility model |