CN110993285A - Voltage transformer and manufacturing method thereof - Google Patents
Voltage transformer and manufacturing method thereof Download PDFInfo
- Publication number
- CN110993285A CN110993285A CN201911075435.1A CN201911075435A CN110993285A CN 110993285 A CN110993285 A CN 110993285A CN 201911075435 A CN201911075435 A CN 201911075435A CN 110993285 A CN110993285 A CN 110993285A
- Authority
- CN
- China
- Prior art keywords
- voltage
- epoxy resin
- insulating cylinder
- coil
- resin insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/325—Coil bobbins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
Abstract
A voltage transformer and a manufacturing method thereof are provided, the voltage transformer comprises an epoxy resin insulating cylinder, a primary high-voltage coil, a secondary low-voltage coil, a low-voltage secondary coil framework and an annular iron core, and is characterized in that conductive paint layers are respectively coated on the inner wall and the outer wall of the epoxy resin insulating cylinder, the primary high-voltage coil is fixedly sleeved on the outer wall of the epoxy resin insulating cylinder, and the secondary low-voltage coil is fixedly arranged on the inner wall of the epoxy resin insulating cylinder. The low-voltage secondary coil framework is an annular framework, the low-voltage secondary coil framework is fixedly arranged on the inner wall of the secondary low-voltage coil, and one side of the annular iron core is transversely inserted into a central hole of the low-voltage secondary coil framework and is fixedly connected with the inner wall of the low-voltage secondary coil framework. And a conductive paint layer on the inner wall of the epoxy resin insulating cylinder is fixedly provided with a copper woven tape, and the other end of the copper woven tape is fixedly connected with the outer wall of the annular iron core. The invention not only realizes higher partial discharge qualification rate, but also meets the requirement of large-scale production.
Description
Technical Field
The invention relates to the field of transformers, in particular to a voltage transformer capable of reducing partial discharge and improving manufacturing efficiency and a manufacturing method thereof.
Background
In order to solve the contradiction between the production efficiency and partial discharge of the existing voltage transformer, the main insulation between a high-voltage coil and a low-voltage coil in the production process of the existing voltage transformer basically adopts two modes, namely PMP paper is adopted as the main insulation, so that the production efficiency is high, but the partial discharge qualified rate is not high; secondly, the primary high-voltage coil is fixed by adopting a special bracket hollow core, and the mode has high partial discharge qualification rate, but has low production efficiency and is not suitable for large-scale production.
Disclosure of Invention
The invention aims to solve the problems and provides a voltage transformer and a manufacturing method thereof, and the method can solve the contradiction between the partial discharge qualification rate and the production efficiency of the voltage transformer in the prior art.
The technical scheme is as follows:
a voltage transformer and a manufacturing method thereof comprise a primary high-voltage coil, a primary coil framework, a secondary low-voltage coil, a secondary coil framework, an iron core and an epoxy resin casting body, wherein the primary high-voltage coil is wound on the primary coil framework, the secondary low-voltage coil is wound on the secondary coil framework, the secondary low-voltage coil is arranged in the primary coil framework, and the secondary low-voltage coil is sleeved on the iron core through the secondary coil framework after being assembled; one end of the primary high-voltage coil is connected and conducted with one end of the outer conductive paint layer, the other end of the outer conductive paint layer is connected with a first high-voltage wiring terminal A through a high-voltage wire, and the other end of the primary high-voltage coil is connected with a second high-voltage wiring terminal B; one end of the secondary low-voltage coil is connected with one end of the inner conductive paint layer and is conducted, the other end of the inner conductive paint layer is connected with a first output wiring terminal C arranged in the secondary wiring box on the outer wall of the epoxy resin pouring body through a soft copper braided belt, and the other end of the secondary low-voltage coil is connected with a second output wiring terminal D arranged in the secondary wiring box.
The manufacturing method of the epoxy resin insulating cylinder comprises the following steps:
step 1: manufacturing an epoxy resin insulating cylinder by adopting an APG die casting production process at a high temperature of 150 ℃;
step 2: after the epoxy resin insulating cylinder is demoulded, the stepped fixed telephone temperature is adopted, namely: cooling to 135 deg.C for 18 hr, cooling to 100 deg.C for 6 hr, cooling to 80 deg.C for 2 hr, and naturally cooling to room temperature;
and step 3: the whole surface of the epoxy resin insulating cylinder is roughened by adopting special sand blasting equipment;
and 4, step 4: and finally, spraying a conductive paint layer on the inner surface and the outer surface of the epoxy resin insulating cylinder, and only leaving the end part of the epoxy resin insulating cylinder without spraying.
The invention adopts the specially made epoxy resin insulating cylinder between the primary coil and the secondary coil of the voltage transformer, thereby successfully solving the contradiction between partial discharge and production efficiency. Not only realizes higher partial discharge qualification rate, but also meets the requirement of large-scale production.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a schematic structural view of the epoxy resin insulating cylinder of the present invention.
Detailed Description
The utility model provides a voltage transformer and preparation method thereof, includes primary high voltage coil 1, primary coil skeleton 2, secondary low voltage coil 3, secondary coil skeleton 4, iron core 5 and epoxy resin pouring body 6, and primary high voltage coil 1 is around establishing on primary coil skeleton 2, and secondary low voltage coil 3 is around establishing on secondary coil skeleton 4, and secondary low voltage coil 3 installs in primary coil skeleton 2, and the suit is on iron core 5 through secondary coil skeleton 4 after the equipment is good, its characterized in that: the primary coil framework 2 is an epoxy resin cylinder, an outer conductive paint layer 7 is arranged on the outer surface of the epoxy resin cylinder, and an inner conductive paint layer 8 is arranged on the inner surface of the epoxy resin cylinder; one end of the primary high-voltage coil 1 is connected and conducted with one end of the outer conductive paint layer 7, the other end of the outer conductive paint layer 7 is connected with a 1 st high-voltage wiring terminal A through a high-voltage wire, and the other end of the primary high-voltage coil 1 is connected with a 2 nd high-voltage wiring terminal B; one end of the secondary low-voltage coil 3 is connected with one end of the inner conductive paint layer 8 and is conducted, the other end of the inner conductive paint layer 8 is connected with a 1 st output wiring terminal C arranged in the secondary wiring box on the outer wall of the epoxy resin pouring body 6 through a soft copper braided belt 9, and the other end of the secondary low-voltage coil 3 is connected with a 2 nd output wiring terminal D in the secondary wiring box.
The manufacturing method of the epoxy resin insulating cylinder comprises the following steps:
step 1: manufacturing an epoxy resin insulating cylinder by adopting an APG die casting production process at a high temperature of 150 ℃;
step 2: after the epoxy resin insulating cylinder is demoulded, the stepped fixed telephone temperature is adopted, namely: cooling to 135 deg.C for 18 hr, cooling to 100 deg.C for 6 hr, cooling to 80 deg.C for 2 hr, and naturally cooling to room temperature;
and step 3: the whole surface of the epoxy resin insulating cylinder is roughened by adopting special sand blasting equipment;
and 4, step 4: and finally, spraying a conductive paint layer on the inner surface and the outer surface of the epoxy resin insulating cylinder, and only leaving the end part of the epoxy resin insulating cylinder without spraying.
Claims (2)
1. A voltage transformer and a manufacturing method thereof comprise a primary high-voltage coil (1), a primary coil framework (2), a secondary low-voltage coil (3), a secondary coil framework (4), an iron core (5) and an epoxy resin casting body (6), wherein the primary high-voltage coil (1) is wound on the primary coil framework (2), the secondary low-voltage coil (3) is wound on the secondary coil framework (4), the secondary low-voltage coil (3) is arranged in the primary coil framework (2), and is sleeved on the iron core (5) through the secondary coil framework (4) after being assembled, the voltage transformer is characterized in that the primary coil framework (2) is an epoxy resin insulating cylinder, an outer conductive paint layer (7) is arranged on the outer surface of the epoxy resin insulating cylinder, and an inner conductive paint layer (8) is arranged on the inner surface of the epoxy resin insulating cylinder; one end of the primary high-voltage coil (1) is connected and conducted with one end of the outer conductive paint layer (7), the other end of the outer conductive paint layer (7) is connected with the first high-voltage wiring terminal A through a high-voltage wire, and the other end of the primary high-voltage coil (1) is connected with the second high-voltage wiring terminal B; one end of the secondary low-voltage coil (3) is connected with one end of the inner conductive paint layer (8) and is conducted, the other end of the inner conductive paint layer (8) is connected with a first output wiring terminal C arranged in the secondary wiring box on the outer wall of the epoxy resin casting body (6) through a soft copper woven belt (9), and the other end of the secondary low-voltage coil (3) is connected with a second output wiring terminal D in the secondary wiring box.
2. The voltage transformer of claim 1, wherein the epoxy resin insulating cylinder is manufactured by a method comprising:
step 1: manufacturing an epoxy resin insulating cylinder by adopting an APG die casting production process at a high temperature of 150 ℃;
step 2: after the epoxy resin insulating cylinder is demoulded, the stepped fixed telephone temperature is adopted, namely: cooling to 135 deg.C for 18 hr, cooling to 100 deg.C for 6 hr, cooling to 80 deg.C for 2 hr, and naturally cooling to room temperature;
and step 3: the whole surface of the epoxy resin insulating cylinder is roughened by adopting special sand blasting equipment;
and 4, step 4: and finally, spraying a conductive paint layer on the inner surface and the outer surface of the epoxy resin insulating cylinder, and only leaving the end part of the epoxy resin insulating cylinder without spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911075435.1A CN110993285A (en) | 2019-11-06 | 2019-11-06 | Voltage transformer and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911075435.1A CN110993285A (en) | 2019-11-06 | 2019-11-06 | Voltage transformer and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110993285A true CN110993285A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911075435.1A Pending CN110993285A (en) | 2019-11-06 | 2019-11-06 | Voltage transformer and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110993285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117038261A (en) * | 2023-08-21 | 2023-11-10 | 广东四会互感器厂有限公司 | Voltage transformer for gas-insulated high-voltage station and manufacturing process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB397312A (en) * | 1931-10-06 | 1933-08-24 | Westinghouse Electric & Mfg Co | Improvements in or relating to electric transformers |
| CN104576006A (en) * | 2015-01-08 | 2015-04-29 | 大连第二互感器集团有限公司 | Current transformer being able to reduce local discharge and manufacturing method thereof |
| CN204614647U (en) * | 2015-05-26 | 2015-09-02 | 日九（大连）互感器有限公司 | A kind of 35kV outdoor voltage transformer |
| CN204614648U (en) * | 2015-05-28 | 2015-09-02 | 日九（大连）互感器有限公司 | A kind of outdoor voltage transformer |
| CN109300576A (en) * | 2018-12-03 | 2019-02-01 | 大连北方互感器集团有限公司 | A kind of major insulation device and production method, voltage transformer and production method |
-
2019
- 2019-11-06 CN CN201911075435.1A patent/CN110993285A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB397312A (en) * | 1931-10-06 | 1933-08-24 | Westinghouse Electric & Mfg Co | Improvements in or relating to electric transformers |
| CN104576006A (en) * | 2015-01-08 | 2015-04-29 | 大连第二互感器集团有限公司 | Current transformer being able to reduce local discharge and manufacturing method thereof |
| CN204614647U (en) * | 2015-05-26 | 2015-09-02 | 日九（大连）互感器有限公司 | A kind of 35kV outdoor voltage transformer |
| CN204614648U (en) * | 2015-05-28 | 2015-09-02 | 日九（大连）互感器有限公司 | A kind of outdoor voltage transformer |
| CN109300576A (en) * | 2018-12-03 | 2019-02-01 | 大连北方互感器集团有限公司 | A kind of major insulation device and production method, voltage transformer and production method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117038261A (en) * | 2023-08-21 | 2023-11-10 | 广东四会互感器厂有限公司 | Voltage transformer for gas-insulated high-voltage station and manufacturing process thereof |
| CN117038261B (en) * | 2023-08-21 | 2024-02-02 | 广东四会互感器厂有限公司 | Voltage transformer for gas-insulated high-voltage station and manufacturing process thereof |
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Application publication date: 20200410 |
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