CN106771467A - Current sensor, its coil encapsulation method and electronic current mutual inductor - Google Patents
Current sensor, its coil encapsulation method and electronic current mutual inductor Download PDFInfo
- Publication number
- CN106771467A CN106771467A CN201611007743.7A CN201611007743A CN106771467A CN 106771467 A CN106771467 A CN 106771467A CN 201611007743 A CN201611007743 A CN 201611007743A CN 106771467 A CN106771467 A CN 106771467A
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- Prior art keywords
- coil
- current sensor
- support body
- interval
- supporter
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005538 encapsulation Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000006260 foam Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 16
- 238000005187 foaming Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F38/28—Current transformers
- H01F38/30—Constructions
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The present invention relates to current sensor, its coil encapsulation method and electronic current mutual inductor.Wherein current sensor includes coil and sensor housing, and the coil is coaxially arranged with the sensor housing and has interval between the two, and coil support body is provided with the interval, and the coil support body is foam-filled body.The coil encapsulation method of current sensor includes inserting coil in sensor shell body, make coil and the coaxially arranged step of sensor housing, also include the interval between the expanded material injection coil and sensor housing by flow morphology, expanded material is set to produce curing reaction and fill the interval, in interval the step of formation foam-filled body.The sensor is easily manufactured, and process is simple, hardening time is short, low cost, light weight.Simultaneously as the hardness of foam-filled body is smaller, can avoid that coil is caused to damage, improve product percent of pass.
Description
Technical field
The present invention relates to current sensor, its coil encapsulation method and electronic current mutual inductor.
Background technology
Electronic current mutual inductor generally comprises current sensor and electronic unit, and current sensor typically uses Roche line
Circle or low-power iron-core coil（LPCT coils）, the winding wire diameter of these coils is general relatively thin, need to be encapsulated in sensor shell body
Protected, in order to ensure the degree of accuracy of current transformer and stablize shape, coil is coaxially arranged with sensor housing, when using
Need to make sensor housing coaxially arranged with Primary Conductor, and then make coil coaxial with Primary Conductor；Electronic unit is used for sieve
The simulation small-signal of family name's coil output exports satisfactory signal through electronic unit filtering, A/D treatment.
In order to realize the coil encapsulation of current sensor, prior art be by coil by gold utensil fixed press technique or
Epoxy casting technique, then current sensor is positioned at the concentric position of Primary Conductor by mechanically connecting.Wherein gold utensil extruding
Mode need to build complex mechanical structure, design more redundancy, high cost；And epoxy casting technique is to insert coil
In sensor shell body, then by the poured with epoxy resin of liquid to the interval between coil and sensor housing, epoxy resin
The coil support body for being positioned to coil and being protected, such current sensor complex manufacturing technology, and cast matrix are formed after solidification
It is harder, the coil of easy damaged current sensor, and epoxy cure time is long, low production efficiency, while equally existing into
This problem high, manufacture is inconvenient.
The content of the invention
It is an object of the invention to provide a kind of current sensor, to solve current sensor manufacture of the prior art not side
Just, the problem of high cost.Meanwhile, present invention also offers a kind of electronic current mutual inductor and the coil encapsulation of current sensor
Method.
To achieve the above object, a kind of technical scheme of current sensor use is in the present invention：
A kind of current sensor, including coil and sensor housing, the coil are coaxially arranged with the sensor housing and two
There is interval between person, coil support body is provided with the interval, the coil support body is foam-filled body.
The each of the coil is equipped with foam-filled body laterally.
The positioning supporter along the spaced arrangement of circumference of coil, the positioning support body supports are provided with the interval
Between coil and sensor housing.
The sensor housing is toroidal shell, including madial wall, lateral wall and bottom wall, the positioning supporter include branch
Support the bottom supporter between bottom wall and coil, end and the inner side of the bottom supporter in coil in the radial direction
Between wall or lateral wall liquid mouthful is crossed the bottom of with.
The positioning supporter also includes the collateral support body being supported between coil and madial wall or coil and lateral wall.
The sensor housing includes the top cover relative with bottom wall, and the positioning supporter also includes being supported on coil with top
Topmast support body between lid, in coil in the radial direction, the end of the topmast support body and the madial wall or lateral wall it
Between have and pushed up liquid mouthful.
The bottom supporter, collateral support body and topmast support body are sequentially connected and are formed the U-shaped for turning over and turning 90 degrees, the positioning of U-shaped
By being located on madial wall or lateral wall, the length of its midsole supporter is more than the length of topmast support body to supporter.
The positioning supporter is support chip.
The technical scheme of electronic current mutual inductor use is in the present invention：
Electronic current mutual inductor, including current sensor and electronic unit, current sensor include coil and sensor housing,
The coil is coaxially arranged with the sensor housing and has interval between the two, and coil support body is provided with the interval,
The coil support body is foam-filled body.
The each of the coil is equipped with foam-filled body laterally.
The positioning supporter along the spaced arrangement of circumference of coil, the positioning support body supports are provided with the interval
Between coil and sensor housing.
The sensor housing is toroidal shell, including madial wall, lateral wall and bottom wall, the positioning supporter include branch
Support the bottom supporter between bottom wall and coil, end and the inner side of the bottom supporter in coil in the radial direction
Between wall or lateral wall liquid mouthful is crossed the bottom of with.
The positioning supporter also includes the collateral support body being supported between coil and madial wall or coil and lateral wall.
The sensor housing includes the top cover relative with bottom wall, and the positioning supporter also includes being supported on coil with top
Topmast support body between lid, in coil in the radial direction, the end of the topmast support body and the madial wall or lateral wall it
Between have and pushed up liquid mouthful.
The bottom supporter, collateral support body and topmast support body are sequentially connected and are formed the U-shaped for turning over and turning 90 degrees, the positioning of U-shaped
By being located on madial wall or lateral wall, the length of its midsole supporter is more than the length of topmast support body to supporter.
The positioning supporter is support chip.
The technical scheme of the coil encapsulation method use of current sensor is in the present invention：
The coil encapsulation method of current sensor, the method is comprised the following steps, and coil is inserted sensor housing by step one
It is interior, make coil coaxially arranged with sensor housing；Step 2, coil and sensor housing are injected by the expanded material of flow morphology
Between interval, make expanded material produce curing reaction and fill the interval, interval in formed foam-filled body.
Then and U-shaped further, step one coil is snapped in first in the positioning supporter for turning over the U-shaped turning 90 degrees,
Positioning supporter is inserted in sensor shell body jointly, and the positioning supporter of U-shaped is by being located at madial wall or the outside of sensor housing
On wall.
Further, the positioning supporter includes the bottom supporter being supported between bottom wall and coil, in the footpath of coil
To on direction, liquid mouthful is crossed the bottom of between the end of the bottom supporter and the madial wall or lateral wall.
Further, the sensor housing includes the top cover relative with bottom wall, and the positioning supporter also includes support
Topmast support body between coil and top cover, in coil in the radial direction, end and the madial wall of the topmast support body
Or have between lateral wall and pushed up liquid mouthful.
Further, the expanded material is polyurethane foam material.
Beneficial effect：The present invention uses above-mentioned technical proposal, and coil support body is foam-filled body, during manufacture, by fluid
Interval between the expanded material injection coil and sensor housing of form, makes expanded material produce curing reaction and fill described
Interval, you can foam-filled body is formed in interval, easily manufactured, process is simple, hardening time is short, low cost, light weight.Together
When, because the hardness of foam-filled body is smaller, can avoid that coil is caused to damage, be conducive to improving product percent of pass.
Brief description of the drawings
Fig. 1 is that one embodiment of current sensor in the present invention removes the structural representation after top cover, while being also electricity
The structural representation of the current sensor in one embodiment of type current transformer；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is the schematic diagram that electronic current mutual inductor in Fig. 1 is applied to AIS；
Fig. 4 is the schematic diagram that electronic current mutual inductor in Fig. 1 is applied to GIS.
Each reference is corresponding entitled in figure：10- coils, 20- sensor housings, 21- madial walls, 22- lateral walls,
Liquid mouthful is crossed at 23- bottom walls, 24- top covers, 30- positioning supporters, 31- bottoms supporter, the collateral support bodies of 32-, 33- topmast support bodies, 34 bottoms,
35- pushed up liquid mouthful, 40- foam-filled bodies, 51-AIS transformer housings, 511- supports insulatives, 512- insulating sleeves, 52-GIS
Shell, 521- epoxy patchboards, 522- fasteners, 60- signal lead-out wires, 70- Primary Conductors.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
One embodiment of current sensor of the present invention is as shown in Fig. 1 ~ Fig. 4, including coil 10, sensor housing 20 and fixed
Position supporter 30, sensor housing 20 is toroidal shell, including madial wall 21, lateral wall 22, bottom wall 23 and top cover 24, top cover 24
It is removable to be fixed on madial wall 21 and lateral wall 22, between coil 10 and madial wall 21, lateral wall 22, bottom wall 23 and top cover 24
It is foam-filled body 40 with interval, in interval.Positioning supporter 30 is provided with three, and each positioning supporter 30 is spacer,
It is shaped as turning over the U-shaped turning 90 degrees, by being located on lateral wall 22.
Positioning supporter 30 is adopted and is made from an insulative material, including is supported on the bottom supporter between bottom wall 23 and coil 10
31st, the collateral support body 32 that is supported between coil 10 and madial wall 21 or coil 10 and lateral wall 22 and be supported on coil 10 with
Topmast support body 33 between top cover 24.In coil 10 in the radial direction, the medial end of bottom supporter 31 and madial wall 21 it
Between cross liquid mouthfuls 34 bottom of with, have between the outboard end of topmast support body 33 and the madial wall 21 and pushed up liquid mouthful 35.So, line
Circle 10 can be supported on bottom supporter 31 to be formed with bottom wall 23 and be spaced, and radially located by collateral support body 32, it is ensured that line
Circle 10 is coaxial with the madial wall 21 of sensor housing 20, meanwhile, bottom crosses liquid mouthful 34 and pushed up liquid mouthful 35 and ensure that foaming material
Material is smoothly expanded when there is curing reaction, and good filling is formed to interval.In order to ensure positioning supporter 30 to coil 10
Stabilization support, while reducing positioning supporter 30 as far as possible to the foaming of expanded material influence, the length of bottom supporter 31 is more than
The length of topmast support body 33.
During manufacture, three positioning supporters 30 are set on coil 10 along the circumferential uniform card of coil 10 first, then will be fixed
Position supporter 30 and coil 10 insert the annular cavity of toroidal shell together, make positioning supporter 30 by being located on lateral wall 22,
The positioning to coil 10 is realized, while ensureing that coil 10 is coaxial with sensor housing 20.Then, by the expanded material of flow morphology
Be poured slowly into the interval between coil 10 and sensor housing 20, the liquid level after injection by final encapsulating material expansion system
Number decision, generally 1/3 or so of the height of sensor housing 20, then stand one end time, check embedding quality, and according to need
Asking carries out secondary teeming or removed to pour part, fixed upper top cover 24, completes encapsulation.Expanded material volumetric expansion after solidification,
Coil 10 can be completely covered and is fixed firmly in sensor housing 20, it is ensured that parts relatively with one heart, and form light
Sliding surface, falls to consider phenomenon to be worth doing without breakage.Cast scene should try one's best and ensure cleaning, in case expanded material is contaminated causing performance to be lost
Effect.Above-mentioned expanded material is polyurethane foam material, and composition is set as needed, has good cushioning effect after solidification
With recoverable force ability；Its operating temperature is -40 DEG C ~ 70 DEG C, is not influenceed without brittle slag-off phenomenon, and non-volatile thing or volatile matter
The insulating properties of SF6 gas-insulated transformers；The material mixture ratio and species of expanded material can be adjusted according to different application occasion
It is whole, to increase or shorten hardening time, increase or reduction hardness etc..
The technique that above-mentioned manufacturing process is used is also a reality of the coil encapsulation method of current sensor in the present invention
Apply example.
One embodiment of electronic current mutual inductor includes current sensor and electronic unit, wherein electric current in the present invention
Sensor is the current transformer in above-described embodiment, and electronic unit is prior art, is repeated no more herein.
When AIS current transformer environment is applied to, as shown in figure 3, current sensor is consolidated by supports insulative 511
It is scheduled in AIS transformer housings 51, it is ensured that Primary Conductor 70 is concentric with current sensor, AIS transformer housings 51 are fixed on
On insulating sleeve 512, signal lead-out wire 60 is drawn from insulating sleeve 512 and is connected with electronic unit.
When GIS current transformer environment is applied to, as shown in figure 4, current sensor is used into fastener 522 and GIS
Shell 52 carries out firm connection, it is ensured that Primary Conductor 70 is concentric with shield shell, and signal lead-out wire 60 is through epoxy patchboard 521
Draw outside GIS housings.
In the above-described embodiments, coil 10 is each to foam-filled body 40 is equipped with, using the positioning branch of support sheet form
Support body 30 is positioned with sensor housing 20.In other embodiments of the invention, coil 10 can also only have part direction and pass
Interval is formed between sensor housing 20, and is positioned supporter 30 and according to circumstances only can also be set in portion, positioning support
Body 30 may be replaced by the form of support block, and can be by being located on the madial wall 21 of toroidal shell.
Claims (10)
1. current sensor, including coil and sensor housing, the coil it is coaxially arranged with the sensor housing and both
Between have interval, coil support body is provided with the interval, it is characterised in that：The coil support body is foam-filled body.
2. current sensor according to claim 1, it is characterised in that：The each of the coil is equipped with foaming and fills out laterally
Fill body.
3. current sensor according to claim 2, it is characterised in that：It is provided with the interval along the circumferential mutual of coil
Spaced apart positioning supporter, the positioning support body supports are between coil and sensor housing.
4. current sensor according to claim 3, it is characterised in that：The sensor housing is toroidal shell, including
Madial wall, lateral wall and bottom wall, the positioning supporter include the bottom supporter being supported between bottom wall and coil, in coil
In the radial direction, liquid mouthful is crossed the bottom of between the end of the bottom supporter and the madial wall or lateral wall.
5. current sensor according to claim 4, it is characterised in that：The positioning supporter also includes being supported on coil
Collateral support body between madial wall or coil and lateral wall.
6. current sensor according to claim 5, it is characterised in that：The sensor housing includes relative with bottom wall
Top cover, the positioning supporter also includes the topmast support body being supported between coil and top cover, institute in coil in the radial direction
State to have between the end of topmast support body and the madial wall or lateral wall and pushed up liquid mouthful.
7. current sensor according to claim 6, it is characterised in that：The bottom supporter, collateral support body and top support
Body is sequentially connected and is formed the U-shaped for turning over and turning 90 degrees, the positioning supporter of U-shaped by being located on madial wall or lateral wall, its midsole branch
Length of the length of support body more than topmast support body.
8. the current sensor according to any one of claim 3-7, it is characterised in that：It is described positioning supporter be
Support chip.
9. electronic current mutual inductor, including current sensor and electronic unit, it is characterised in that：The current sensor is power
Profit requires the current sensor described in any one in 1-8.
10. the coil encapsulation method of current sensor, it is characterised in that the method is comprised the following steps, step one, and coil is put
Enter in sensor shell body, make coil coaxially arranged with sensor housing；Step 2, coil is injected by the expanded material of flow morphology
Interval between sensor housing, makes expanded material produce curing reaction and fill the interval, and foaming is formed in interval
Obturator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007743.7A CN106771467A (en) | 2016-11-16 | 2016-11-16 | Current sensor, its coil encapsulation method and electronic current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007743.7A CN106771467A (en) | 2016-11-16 | 2016-11-16 | Current sensor, its coil encapsulation method and electronic current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106771467A true CN106771467A (en) | 2017-05-31 |
Family
ID=58968566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611007743.7A Pending CN106771467A (en) | 2016-11-16 | 2016-11-16 | Current sensor, its coil encapsulation method and electronic current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106771467A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538181A (en) * | 2003-10-24 | 2004-10-20 | 西安西开高压电气股份有限公司 | Combined type electronic current-voltage sensor |
| CN101127274A (en) * | 2007-07-20 | 2008-02-20 | 西安电力机械制造公司 | Current transformer of gas insulated metal sealing switchgear |
| CN201449884U (en) * | 2009-04-13 | 2010-05-05 | 中国西电电气股份有限公司 | High-voltage current transformer |
| CN201975251U (en) * | 2010-04-13 | 2011-09-14 | 徐其信 | Split type current transformer |
| CN202217580U (en) * | 2011-08-05 | 2012-05-09 | 平高集团有限公司 | Current transformer for metal enclosed switch device |
| CN202871549U (en) * | 2012-10-30 | 2013-04-10 | 中国西电电气股份有限公司 | Coil fixing structure of sulfur hexafluoride current transformer |
| CN105428046A (en) * | 2015-11-23 | 2016-03-23 | 河南平芝高压开关有限公司 | GIS externally-mounted current transformer |
| US20160154027A1 (en) * | 2014-11-28 | 2016-06-02 | Lem Intellectual Property Sa | Electrical current transducer |
| CN105849833A (en) * | 2013-12-26 | 2016-08-10 | 株式会社自动网络技术研究所 | Inductor |
| CN206282704U (en) * | 2016-11-16 | 2017-06-27 | 国家电网公司 | Coil packing structure and the current transformer using the coil packing structure |
-
2016
- 2016-11-16 CN CN201611007743.7A patent/CN106771467A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538181A (en) * | 2003-10-24 | 2004-10-20 | 西安西开高压电气股份有限公司 | Combined type electronic current-voltage sensor |
| CN101127274A (en) * | 2007-07-20 | 2008-02-20 | 西安电力机械制造公司 | Current transformer of gas insulated metal sealing switchgear |
| CN201449884U (en) * | 2009-04-13 | 2010-05-05 | 中国西电电气股份有限公司 | High-voltage current transformer |
| CN201975251U (en) * | 2010-04-13 | 2011-09-14 | 徐其信 | Split type current transformer |
| CN202217580U (en) * | 2011-08-05 | 2012-05-09 | 平高集团有限公司 | Current transformer for metal enclosed switch device |
| CN202871549U (en) * | 2012-10-30 | 2013-04-10 | 中国西电电气股份有限公司 | Coil fixing structure of sulfur hexafluoride current transformer |
| CN105849833A (en) * | 2013-12-26 | 2016-08-10 | 株式会社自动网络技术研究所 | Inductor |
| US20160154027A1 (en) * | 2014-11-28 | 2016-06-02 | Lem Intellectual Property Sa | Electrical current transducer |
| CN105428046A (en) * | 2015-11-23 | 2016-03-23 | 河南平芝高压开关有限公司 | GIS externally-mounted current transformer |
| CN206282704U (en) * | 2016-11-16 | 2017-06-27 | 国家电网公司 | Coil packing structure and the current transformer using the coil packing structure |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: XJ Group Corp. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Applicant before: State Grid Corporation of China Applicant before: XJ Group Corp. |
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Effective date of registration: 20230808 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: XJ Group Corp. Applicant after: XJ ELECTRIC Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Applicant before: STATE GRID CORPORATION OF CHINA Applicant before: XJ Group Corp. |
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Application publication date: 20170531 |
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