CN208093350U - A kind of current transformer iron core component and current transformer - Google Patents
A kind of current transformer iron core component and current transformer Download PDFInfo
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- CN208093350U CN208093350U CN201820033863.2U CN201820033863U CN208093350U CN 208093350 U CN208093350 U CN 208093350U CN 201820033863 U CN201820033863 U CN 201820033863U CN 208093350 U CN208093350 U CN 208093350U
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- current transformer
- iron core
- inner insulating
- core component
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Abstract
The utility model is related to a kind of current transformer iron core component and current transformers, belong to electrical equipment technical field.The current transformer iron core component of the utility model, including ring-shaped core and coated inner insulating layer and external insulation layer outside ring-shaped core, buffer layer is provided between the inner insulating layer and external insulation layer, the buffer layer is provided only on the radial outer side of inner insulating layer.Buffer layer is provided only on outside the radial outer side of inner insulating layer by the current transformer iron core component of the utility model, and the materials'use amount of buffer layer is greatly saved, reduces cost.
Description
Technical field
The utility model is related to a kind of current transformer iron core component and current transformers, belong to power equipment technology neck
Domain.
Background technology
Current transformer is the main mating electrical element of power industry, is generally mounted in switchgear.Currently, entire
In the production process of mutual inductor, the material cost of iron core coating occupies the 13% of totle drilling cost, the especially selection of silicon rubber, more
It is to improve cost accounting.It is analyzed in terms of the forming process that material acquires mechanics and product, the forming process of mutual inductor is one
A process by liquid-state epoxy resin to solid forming.Epoxy resin has certain contraction during curing molding, these receipts
The direction of contracting power is a process from outside to inside, if the secondary winding surface of mutual inductor does not have buffer layer, these shrinkage stresses
Once being applied on iron core, the magnetic property of iron core will result in destruction, influence properties of product.Therefore, mutual inductance in the prior art
Device generally all selects one to two layers silicon rubber as buffer layer.
In the prior art, current transformer is mainly including core assemblies and the coil being arranged on core assemblies, such as Fig. 1 institutes
Show, core assemblies include iron core 1 and the coating that is wrapped on iron core, and clad inner insulating layer, external insulation layer and setting exist
Buffer layer between inside and outside insulating layer, inner insulating layer include electrical adhesive tape layer 2 and calico belt 3, and buffer layer is silastic-layer 4,
External insulation layer is wrinkle paper layer 5.Silastic-layer can guarantee insulation performance and play cushioning effect.
But complete coated or coated more silastic-layer outside inner insulating layer, considerably increase cost.In addition, due to iron
Heart outer layer is coated with more silicon rubber, and the finished product height of secondary coil can increase accordingly, for ensure product major insulation, one
The length of partial conductor also can increase material cost with increasing for secondary coil, if things go on like this, give the economic development band of enterprise
It centainly loses, also causes centainly to waste to social resources.
Utility model content
The purpose of this utility model is to provide a kind of lower-cost current transformer iron core components.
The purpose of this utility model, which also resides in, provides a kind of current transformer using above-mentioned core assemblies.
To achieve the above object, the technical solution of the current transformer iron core component of the utility model is：
A kind of current transformer iron core component, including ring-shaped core and the coated inner insulating layer outside ring-shaped core and outer
Insulating layer, is provided with buffer layer between the inner insulating layer and external insulation layer, the buffer layer is provided only on the diameter of inner insulating layer
Outside side.
Buffer layer is provided only on outside the radial outer side of inner insulating layer by the current transformer iron core component of the utility model,
The materials'use amount of buffer layer is greatly saved, reduces cost.Simultaneously because when epoxy resin is shunk, on the outside slow is set
Layer is rushed to remain to offset most of stress.Specifically, the contraction due to epoxy resin has relationship, current transformer with the structure of product
Iron core be loop configuration, the product of loop configuration easy tos produce contraction, deformation when by external force.Epoxy resin was being shunk
Generated in journey stress be affected to iron core outer diameter, and the influence to the direction of cross section is smaller, the utility model it is exhausted
Edge cardboard layer is provided only on the peripheral surface of ring-shaped core, reduces cost, also avoids the influence to secondary coil.
The buffer layer is insulating paper layer.Silastic-layer in the prior art is substituted using insulating board layer, it can be abundant
The stress that epoxy resin generates iron core direction is offset, and can farthest reduce material cost, reaches energy-saving mesh
's.
The inner insulating layer includes the interior adhesive tape layer set gradually from inside to outside and calico belt.Interior adhesive tape layer can avoid
Calico belt is directly contacted with iron core surface, is played a protective role.
The external insulation layer includes the wrinkle paper layer set gradually from inside to outside and outer adhesive tape layer.Outer adhesive tape layer can be to wrinkle
Line paper layer plays fixed, protective effect.
The insulating paper layer includes primary insulation cardboard and outer layer insulation cardboard, the primary insulation cardboard and outer layer insulation
Cardboard all has cyclic structure, has carton of inner layer joint portion on primary insulation cardboard, has outer layer paper on outer layer insulation cardboard
Plate joint portion, the carton of inner layer joint portion are in same along the straight line that iron core radially extends with facing board joint portion.
The bonding part of two layers of insulating board is in ring-shaped core both sides.The two is provided separately, and can ensure that insulating paper layer is more firm.
The calico belt is one layer of half lamination of tape.
The wrinkle paper layer is three layers of half lamination of crimped paper.
The technical solution of the current transformer of the utility model is：
A kind of current transformer, including core assemblies and the coil that is arranged on core assemblies, the core assemblies packet
Ring-shaped core and coated inner insulating layer and external insulation layer outside ring-shaped core are included, between the inner insulating layer and external insulation layer
It is provided with buffer layer, the buffer layer is provided only in the radial outer side of inner insulating layer.
The buffer layer is insulating paper layer.
The inner insulating layer includes the interior adhesive tape layer set gradually from inside to outside and calico belt, and the external insulation layer includes
The wrinkle paper layer and outer adhesive tape layer set gradually from inside to outside.
The insulating paper layer includes primary insulation cardboard and outer layer insulation cardboard, the primary insulation cardboard and outer layer insulation
Cardboard all has cyclic structure, has carton of inner layer joint portion on primary insulation cardboard, has outer layer paper on outer layer insulation cardboard
Plate joint portion, the carton of inner layer joint portion are in same along the straight line that iron core radially extends with facing board joint portion.
The calico belt is one layer of half lamination of tape.
The wrinkle paper layer is three layers of half lamination of crimped paper.
Description of the drawings
Fig. 1 is the structural profile illustration of current transformer iron core component in the prior art；
Fig. 2 is the structural profile illustration of the core assemblies of the embodiment of the current transformer of the utility model.
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
The embodiment of the current transformer of the utility model is as shown in Fig. 2, the current transformer of the present embodiment includes epoxy
Resin enclosure and the core assemblies being arranged in epoxy package, core assemblies are arranged with coil outside.The core assemblies packet
It includes ring-shaped core 1 and the coating in core profile is set.The coating includes the inner insulating layer set gradually from inside to outside, delays
Layer, external insulation layer are rushed, inner insulating layer includes interior adhesive tape layer 2, calico belt 3, and buffer layer is insulating board layer 6, external insulation layer packet
Include wrinkle paper layer 5, outer adhesive tape layer 7.The external extension from close to the inside of iron core to far from iron core is referred to from inside to outside.
Interior adhesive tape layer 2 is to use electrical adhesive tape in one layer of wrapped on cores, and calico belt 3 is to use tape with half lap
Mode winds one layer.Insulating board uses PB insulating papers.The specification of insulating paper can be selected optionally, in the present embodiment absolutely
The thickness of edge paper is 1mm.The height of insulating board layer 6 is equal with the height of iron core in an axial direction, circumferential direction of the insulating board along iron core
Fitting is arranged on being wrapped over the iron core peripheral surface of calico belt.Insulating board layer 6 includes altogether two layers of insulating board, i.e., first by one
Layer insulating board is arranged along the circumferential fitting of iron core on being wrapped over the iron core peripheral surface of tape, then in the insulating board
One layer of insulating board is set in the same way again on peripheral surface.The length of insulating board in internal layer and it is wrapped over tape
Iron core peripheral surface circumferential lengths it is equal, i.e., primary insulation cardboard just covers the peripheral surface for the iron core for being wrapped over tape
Lid.The length of insulating board in outer layer and the peripheral surface equal length of primary insulation cardboard, by primary insulation cardboard
Peripheral surface just covers.The joint portion of primary insulation cardboard and the joint portion of outer layer insulation cardboard are in ring-shaped core in the present embodiment
It is misaligned in circumferential direction.And the joint portion of primary insulation cardboard and the joint portion of outer layer insulation cardboard are in along iron core radial direction
On the straight line of extension.The two position overlaps in iron core circumferential direction in other embodiments.
Wrinkle paper layer uses crimped paper band in the prior art to wind three layers in a manner of half lap.Outer adhesive tape layer uses electrician's glue
Band winds one layer in a manner of half lap.
Coil is arranged with outside core assemblies, coil is to carry out coiling formation according to the technical specification of setting.
The current transformer of the present embodiment in the preparation, first winds one layer of electrical adhesive tape outside ring-shaped core, forms electrician
Adhesive tape layer.Then one layer of tape is wound in a manner of half lap outside electrical adhesive tape layer, forms calico belt.Then be wrapped over it is white
It is bonded on the iron core peripheral surface of strap around one layer of insulating board of setting, forms primary insulation cardboard.Then in internal layer insulating paper
It is bonded on the peripheral surface of plate around another layer of insulating board of setting, forms outer layer insulation cardboard.The joint of primary insulation cardboard
The opposite both sides of ring-shaped core peripheral surface are respectively set with the joint of outer layer insulation cardboard, that is, are in together along ring-shaped core diameter
To on the straight line of extension.Crimped paper is wound outside the iron core for setting outer layer insulation cardboard, crimped paper is in the form of half lap
One layer of winding.After the completion of crimped paper winding, one layer of electrical adhesive tape is wound in the form of half lap in outside, forms outer adhesive tape layer.Outer glue
After belt is formed, the coiling outside iron core, wiring, casting epoxy resin can be obtained current transformer.
In the other embodiment of the current transformer of the utility model, insulating board layer is set as one layer or three layers,
The joint portion of each layer insulating board can be on the straight line arranged in a crossed manner along ring-shaped core radial direction at this time.It can not also be arranged
On above-mentioned straight line, only it need to ensure that the joint portion position of two layers adjacent of insulating board is not overlapped.In other embodiments,
Insulating board layer is cricoid insulating paper ring, does not have joint portion above.In other embodiments, the height of insulating board layer
It need to ensure the height not less than iron core, while be not more than the height of wrinkle paper layer again.
In the other embodiment of the current transformer of the utility model, buffer layer is silastic-layer.
In the other embodiment of the current transformer of the utility model, interior adhesive tape layer and outer adhesive tape layer can be by other
Material substitutes, such as uses insulative plastic tape.Alternatively, it is also possible to regard concrete condition, it is not provided with interior adhesive tape layer or outer adhesive tape layer.
In the other embodiment of the current transformer of the utility model, the number of plies of the tape of calico belt can basis
It needs to be determined that if calico belt is two layers or three layers of half lap.Likewise, the number of plies of the crimped paper of wrinkle paper layer can also be according to need
Determine, if wrinkle paper layer is one layer or three layers of half lap.
The embodiment of the current transformer iron core component of the utility model and the iron in the embodiment of above-mentioned current transformer
The structure of heart component is identical, no longer repeats one by one herein.In addition, core assemblies in the embodiment of above-mentioned current transformer
Various alternative ways may also apply to the embodiment of the current transformer iron core component of the utility model.
Claims (10)
1. a kind of current transformer iron core component, including ring-shaped core（1）And it is coated in ring-shaped core（1）Outer inner insulating layer
And external insulation layer, it is provided with buffer layer between the inner insulating layer and external insulation layer, which is characterized in that the buffer layer is only arranged
In the radial outer side of inner insulating layer.
2. current transformer iron core component as described in claim 1, which is characterized in that the buffer layer is insulating paper layer（6）.
3. current transformer iron core component as described in claim 1, which is characterized in that the inner insulating layer includes from inside to outside
The interior adhesive tape layer set gradually（2）With calico belt（3）.
4. current transformer iron core component as described in claim 1, which is characterized in that the external insulation layer includes from inside to outside
The wrinkle paper layer set gradually（5）With outer adhesive tape layer（7）.
5. current transformer iron core component as claimed in claim 2, which is characterized in that the insulating paper layer（6）Including internal layer
Insulating board and outer layer insulation cardboard, the primary insulation cardboard and outer layer insulation cardboard all have cyclic structure, primary insulation
Cardboard has a carton of inner layer joint portion, and outer layer insulation cardboard has a facing board joint portion, the carton of inner layer joint portion with it is outer
Layer paperboard joint portion is in same along the straight line that iron core radially extends.
6. current transformer iron core component as claimed in claim 3, it is characterised in that：The calico belt（3）It is white for one layer
Half lamination of strap.
7. current transformer iron core component as claimed in claim 4, it is characterised in that：The wrinkle paper layer（5）It wrinkles for three layers
Half lamination of line paper.
8. a kind of current transformer, including core assemblies and the coil that is arranged on core assemblies, the core assemblies include
Ring-shaped core（1）And it is coated in ring-shaped core（1）Outer inner insulating layer and external insulation layer, the inner insulating layer and external insulation layer
Between be provided with buffer layer, which is characterized in that the buffer layer is provided only on the radial outer side of inner insulating layer.
9. current transformer as claimed in claim 8, which is characterized in that the buffer layer is insulating paper layer（6）.
10. current transformer as claimed in claim 8, which is characterized in that the inner insulating layer includes setting successively from inside to outside
The interior adhesive tape layer set（2）With calico belt（3）, the external insulation layer includes the wrinkle paper layer set gradually from inside to outside（5）With
Outer adhesive tape layer（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820033863.2U CN208093350U (en) | 2018-01-09 | 2018-01-09 | A kind of current transformer iron core component and current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820033863.2U CN208093350U (en) | 2018-01-09 | 2018-01-09 | A kind of current transformer iron core component and current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208093350U true CN208093350U (en) | 2018-11-13 |
Family
ID=64065440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820033863.2U Expired - Fee Related CN208093350U (en) | 2018-01-09 | 2018-01-09 | A kind of current transformer iron core component and current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208093350U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992519A (en) * | 2019-12-02 | 2021-06-18 | 河南森源电气股份有限公司 | Current transformer iron core buffer processing production method and buffer processing die |
| JP2021158161A (en) * | 2020-03-25 | 2021-10-07 | 三菱電機株式会社 | Zero-phase current transformer |
-
2018
- 2018-01-09 CN CN201820033863.2U patent/CN208093350U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992519A (en) * | 2019-12-02 | 2021-06-18 | 河南森源电气股份有限公司 | Current transformer iron core buffer processing production method and buffer processing die |
| CN112992519B (en) * | 2019-12-02 | 2023-04-07 | 河南森源电气股份有限公司 | Current transformer iron core buffer treatment production method and buffer treatment die |
| JP2021158161A (en) * | 2020-03-25 | 2021-10-07 | 三菱電機株式会社 | Zero-phase current transformer |
| JP7321119B2 (en) | 2020-03-25 | 2023-08-04 | 三菱電機株式会社 | zero phase current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181113 Termination date: 20220109 |