CN106024336B - A kind of middle pressure cast-type mutual inductor of combined insulation - Google Patents
A kind of middle pressure cast-type mutual inductor of combined insulation Download PDFInfo
- Publication number
- CN106024336B CN106024336B CN201610525285.XA CN201610525285A CN106024336B CN 106024336 B CN106024336 B CN 106024336B CN 201610525285 A CN201610525285 A CN 201610525285A CN 106024336 B CN106024336 B CN 106024336B
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- Prior art keywords
- winding
- middle pressure
- mutual inductor
- secondary winding
- insulation
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Classifications
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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
-
- 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
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- 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
- H01F27/327—Encapsulating or impregnating
Abstract
The invention discloses a kind of middle pressure cast-type mutual inductor of combined insulation, a kind of middle pressure cast-type mutual inductor of combined insulation, including first winding, secondary winding and insulating barrier, it is characterised in that：Semiconductor crimped paper screen layer is surrounded by outside first winding and secondary winding, the insulating barrier at major insulation position is after vacuum drying treatment between first winding and secondary winding, polyurethane insulating layer of the vacuum injection after being stirred under vacuum and deaerating at normal temperatures, the non-master insulation position on the outside of first winding is provided with inorganic insulating material filler.Invention significantly improves the electric property of middle pressure casting transformer, shelf depreciation is reduced, the aging of product is prevented or even punctures and burst, improve product reliability of operation.High mechanical strength, cost are low, safety and environmental protection.
Description
Technical field
The present invention relates to the middle pressure cast-type mutual inductor of a kind of transformer, more particularly to a kind of combined insulation.
Background technology
Existing 10 ~ 40.5kV is used in the middle pressure transformer in power system, is typically all poured into a mould using High temperature epoxy resinses.
The transformer of epoxy casting, Fig. 1-1 are the structural representations of the middle pressure pouring current transformer of epoxy casting in the prior art.
Fig. 1-2 is the structural representation of the middle pressure casting type voltage mutual inductor of epoxy casting in the prior art.Fig. 1-3 is in the prior art
The schematic side view of the middle pressure casting type voltage mutual inductor of epoxy casting.It will be left between first winding 11 and secondary winding 12
Enough gaps form insulating barrier 13, and the method for vacuum pouring or the method filling epoxy resin using APG are used in gap, is led to
The insulating barrier for crossing epoxy resin formation undertakes the voltage between a secondary conductor, in addition, this casting transformer, will not only hold
The major insulation between a secondary winding is carried on a shoulder pole, also to undertake the external insulation of first winding over the ground, so substantial amounts of epoxy resin is to use
To solve external insulation, or even account for more than 80%.
This kind of epoxy resin of cast, because to undertake corresponding mechanical strength, equipped with comparing large scale
Filler, this filler can cause castable more sticky, influence the effect of vacuum outgas, can produce shelf depreciation.Epoxy resin
Stress can be produced during hot setting, and toughness is very poor, in use easy cracking, Decrepitation Phenomena.
The content of the invention
It is an object of the invention to provide a kind of middle pressure cast-type mutual inductor of combined insulation, can significantly improve middle pressure cast
The electric property of transformer, shelf depreciation is both reduced, improve product qualification rate, can prevent product from ftractureing or even puncturing again and quick-fried
Split, improve product reliability of operation.Meanwhile volume can be reduced, reduce cost.
The purpose of the present invention is achieved through the following technical solutions：
A kind of middle pressure cast-type mutual inductor of combined insulation, including first winding, secondary winding and insulating barrier, its feature exist
In：Semiconductor crimped paper screen layer is surrounded by outside first winding and secondary winding, it is main between first winding and secondary winding
Insulation position insulating barrier be after vacuum drying treatment, at normal temperatures vacuum injection through be stirred under vacuum deaerate after polyurethane
Insulating barrier, the non-master insulation position on the outside of first winding are provided with inorganic insulating material filler.
Further, inorganic insulating material filler is electroceramics or glass.Insulating barrier is after vacuum drying treatment, normal
The lower vacuum injection of temperature forms no bubble, the polyurethane insulating layer of low partial discharge after being stirred under vacuum degassing, solidification.
Heretofore described middle pressure cast-type mutual inductor is middle pressure pouring current transformer or middle pressure cast-type voltage
Transformer.
The present invention is by the way of combined insulation, on the one hand, the insulating barrier at major insulation position is used as using polyurethane to be poured
Material is noted, it possesses the advantages that excellent electric properties, mobility, toughness are good, and normal temperature cure shrinkage stress is small, can effective solution office
Put, the problems such as preventing cracking during long-term use, explosion.After vacuum drying treatment, vacuum injection is through true at normal temperatures
Sky stirring degassing after excellent electric properties, all good polyurethane of mobility, toughness, formed after solidification no bubble, low partial discharge it is exhausted
Edge layer.Polyurethane material can efficiently solve the problem of High temperature epoxy resinses are present, but this material cost is higher, can not be extensive
Use.On the other hand, semiconductor crimped paper screen layer, non-master insulation position filling electricity are surrounded by outside first winding and secondary winding
The inorganic material filler such as porcelain or glass, can efficiently solve the shortcomings that polyurethane material cost is high.
Invention significantly improves the electric property of middle pressure casting transformer, shelf depreciation is reduced, prevents the aging of product very
To breakdown and explosion, product reliability of operation is improved.There are high mechanical strength, low cost and other advantages simultaneously.In addition, poly- ammonia
Ester is the material that can be recycled, and the inorganic material of inside filling can also recycle, die pressing product ring in solving in the past
Oxygen tree fat can not be handled the problem of can only filling, and have maximum social benefit.
The present invention can significantly improve the electric property of middle pressure casting transformer, both reduce shelf depreciation, improve product and close
Lattice rate, product cracking can be prevented again or even punctures and bursts, improves product reliability of operation.Meanwhile volume can be reduced,
Reduce cost, safety and environmental protection.
Brief description of the drawings
Fig. 1-1 is the structural representation of the middle pressure pouring current transformer of epoxy casting in the prior art.
Fig. 1-2 is the structural representation of the middle pressure casting type voltage mutual inductor of epoxy casting in the prior art.
Fig. 1-3 is the schematic side view of the middle pressure casting type voltage mutual inductor of epoxy casting in the prior art.
Fig. 2-1 is the structural representation of the middle pressure pouring current transformer of the present invention.
Fig. 2-2 is the structural representation of the middle pressure casting type voltage mutual inductor of the present invention.
Fig. 2-3 is the schematic side view of the middle pressure casting type voltage mutual inductor of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 2-1 is the middle pressure pouring current transformer structural representation of the present invention.Fig. 2-2 and Fig. 2-3 is of the invention
Middle pressure casting type voltage mutual inductor structural representation.
A kind of middle pressure cast-type mutual inductor of combined insulation, including first winding 1, secondary winding 2 and insulating barrier 3, one
Semiconductor crimped paper screen layer 5 is surrounded by outside secondary winding and secondary winding, the major insulation portion between first winding and secondary winding
Position insulating barrier 3 be after vacuum drying treatment, at normal temperatures vacuum injection through be stirred under vacuum deaerate after excellent electric properties,
Mobility, toughness are all good, and no bubble, the polyurethane insulating layer of low partial discharge are formed after solidification, non-on the outside of first winding
Major insulation position is provided with inorganic insulating material filler 4.Inorganic insulating material filler is electroceramics or glass.
The present invention is by the way of combined insulation, on the one hand, the insulating barrier at major insulation position is used as using polyurethane to be poured
Material is noted, polyurethane material can efficiently solve the problem of High temperature epoxy resinses are present, but this material cost is higher, Wu Faguang
General use.On the other hand, semiconductor crimped paper screen layer, the filling of non-master insulation position are surrounded by outside first winding and secondary winding
The inorganic material filler such as electroceramics or glass, can efficiently solve the shortcomings that polyurethane material cost is high.The present invention can be used for
In middle pressure pouring current transformer or middle pressure casting type voltage mutual inductor.
Although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect, therefore the protection model of the present invention can be made
Enclose to work as and be defined by what claims were defined.
Claims (2)
1. a kind of middle pressure cast-type mutual inductor of combined insulation, including first winding（1）, secondary winding（2）And insulating barrier（3）,
It is characterized in that：In first winding（1）And secondary winding（2）It is surrounded by semiconductor crimped paper screen layer outside（5）, positioned at first winding
（1）And secondary winding（2）Between major insulation position insulating barrier（3）It is the vacuum impregnating at normal temperatures after vacuum drying treatment
Enter the polyurethane insulating layer after being stirred under vacuum and deaerating（3）, positioned at first winding（1）The non-master insulation position in outside is provided with inorganic
Insulating materials filler（4）；Inorganic insulating material filler（4）It is electroceramics or glass；Insulating barrier（3）It is by vacuum drying
After reason, vacuum injection forms no bubble, the polyurethane insulating layer of low partial discharge after being stirred under vacuum degassing, solidification at normal temperatures
（3）.
2. the middle pressure cast-type mutual inductor of combined insulation according to claim 1, it is characterised in that：Medium pressure cast-type
Transformer is middle pressure pouring current transformer or middle pressure casting type voltage mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525285.XA CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525285.XA CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106024336A CN106024336A (en) | 2016-10-12 |
| CN106024336B true CN106024336B (en) | 2018-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610525285.XA Active CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920639A (en) * | 2017-03-16 | 2017-07-04 | 江苏智达高压电气有限公司 | Cast-type mutual inductor is pressed in a kind of environment-friendly type |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200965825Y (en) * | 2006-10-20 | 2007-10-24 | 信阳信互电器有限公司 | A novel current mutual-inductor |
| BRPI0809582A2 (en) * | 2007-04-12 | 2014-09-23 | Abb Technology Ag | EXTERNAL ELECTRICAL DEVICE WITH A RESIN INSULATION SYSTEM |
| JP2009299614A (en) * | 2008-06-16 | 2009-12-24 | Mitsubishi Electric Corp | Ignition device for internal combustion engine |
| CN201741564U (en) * | 2010-07-20 | 2011-02-09 | 湖北大二互科技有限公司 | Epoxy-resin vacuum-pouring dry-type current transformer |
| CN204011030U (en) * | 2014-08-20 | 2014-12-10 | 南京智达电气有限公司 | Middle pressure pouring current transformer |
| CN205751820U (en) * | 2016-07-06 | 2016-11-30 | 江苏智达高压电气有限公司 | A kind of middle pressure cast-type mutual inductor of combined insulation |
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| CN106024336A (en) | 2016-10-12 |
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