CN106783027B - A kind of isolating transformer - Google Patents
A kind of isolating transformer Download PDFInfo
- Publication number
- CN106783027B CN106783027B CN201611227930.6A CN201611227930A CN106783027B CN 106783027 B CN106783027 B CN 106783027B CN 201611227930 A CN201611227930 A CN 201611227930A CN 106783027 B CN106783027 B CN 106783027B
- Authority
- CN
- China
- Prior art keywords
- isolating transformer
- shell
- iron core
- insulating barrier
- coil
- 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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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
- H01F27/02—Casings
-
- 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
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
This application discloses a kind of isolating transformer, the isolating transformer is wrapped in the insulating paper outside the secondary coil, the oil duct that the insulating barrier for the alternate setting of multilayer being arranged between the shell and the iron core and every two layers of insulating barrier are formed constitutes the pressure-resistance structure of the isolating transformer, it is more uniform that the pressure-resistance structure is distributed the high voltage electric field inside the isolating transformer, so as to greatly improve the compressive resistance of the isolating transformer, on the basis of ensureing that the isolating transformer has higher compressive resistance, the dosage of the transformer oil needed for the isolating transformer can be reduced, and then reduce the design space needed for the isolating transformer, reduce the volume and total quality of the isolating transformer.
Description
Technical field
The application is related to technical field of transformation equipment, more specifically to a kind of isolating transformer.
Background technology
Isolating transformer is generally used for machine maintenance or maintenance, and main function is to keep apart high pressure and low pressure, by
It is not connected in the secondary coil of isolating transformer with the earth, does not all have potential difference, Yong Hujie between its any two lines and the earth
Any one line is touched all without generation electric shock accidents, it is more preferable compared to the security of common transformer.
The isolating transformer of resistance to DC ultra-high-voltage is primarily adapted for use under high voltage or extra-high voltage environment, and it is internal for high electricity
Pressure even extra-high voltage state, therefore the compressive resistance of isolating transformer is one of its important security parameter.In the prior art
Generally lifted by the filling transformer oil between the secondary coil and transformer case of the isolating transformer it is described every
From the compressive resistance of transformer, that is to say, that the core intersection between secondary coil and transformer case directly determines that isolation becomes
The compressive resistance of depressor.Therefore, in order to improve the compressive resistance of the isolating transformer, in the prior art generally by described
Isolating transformer indoor design larger redundant space sets transformer oil.
But this way can cause the overall volume of the isolating transformer and quality larger, it is unfavorable for the isolation and becomes
The carrying of depressor.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of isolating transformer, ensureing the isolation change to realize
On the basis of depressor has higher compressive resistance, the overall volume of the isolating transformer and the purpose of quality are reduced.
To realize above-mentioned technical purpose, the embodiments of the invention provide following technical scheme：
A kind of isolating transformer, including：Shell, the iron core for being arranged at the enclosure, primary coil and secondary coil,
Also include：Wrap up the insulating paper of the secondary coil；
The insulating barrier for the alternate setting of multilayer being arranged between the shell and the iron core, per structure between dielectric layers
Into oil duct, the oil duct is used to set transformer oil.
Optionally, the shell is cylindrical insulation crust.
Optionally, the shell is cylindrical epoxy shell.
Optionally, the multilayer dielectric layer is epoxy sleeve.
Optionally, in addition to：
It is arranged between the cover top portion and the iron core, for setting the fixed iron core, and isolates the iron core
The epoxy mounting plate of voltage between the cover top portion.
Optionally, the primary coil is the cylindrical coil of segmentation coiling.
Optionally, the secondary coil is the cylindrical coil of segmentation coiling.
Optionally, the cylindrical coil of the segmentation coiling is the cylindrical copper foil of segmentation coiling.
It can be seen from the above technical proposal that the embodiments of the invention provide a kind of isolating transformer, the isolation transformation
The alternate setting of multilayer that device is wrapped in the insulating paper outside the secondary coil, is arranged between the shell and the iron core
The oil duct that insulating barrier and every two layers of insulating barrier are formed constitutes the pressure-resistance structure of the isolating transformer, the pressure-resistant knot
It is more uniform that structure is distributed the high voltage electric field inside the isolating transformer, so as to greatly improve the resistance to of the isolating transformer
Compressive Strength, on the basis of ensureing that the isolating transformer has higher compressive resistance, the isolating transformer can be reduced
The dosage of required transformer oil, and then the design space needed for the isolating transformer is reduced, reduce the isolating transformer
Volume and total quality.
In addition, the oil duct between insulating barrier described in multilayer and every two layers of insulating barrier can not only improve the class of insulation,
Local small electric discharge phenomena are reduced to greatest extent, and the dosage of transformer oil can be greatly reduced, and are reduced due to transformer
The influence of dielectric strength of the oil with the pressure-resistant Quality Down of increase of run time and to the isolating transformer.
Further, the insulating paper in the pressure-resistance structure is while the dielectric strength of the isolating transformer is improved,
The water absorption rate of the isolating transformer can also be greatly reduced, improves dielectric strength.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of top cross-sectional view for isolating transformer that one embodiment of the application provides；
Fig. 2 is a kind of top cross-sectional view for isolating transformer that the preferred embodiment of the application provides；
Fig. 3 is a kind of schematic appearance for isolating transformer that one embodiment of the application provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the present application provides a kind of isolating transformer, as shown in figure 1, including shell 10, being arranged at the shell
Iron core 50, primary coil (not shown in accompanying drawing 1) and secondary coil 40 inside 10, in addition to：
Wrap up the insulating paper 60 of the secondary coil 40；
The insulating barrier 20 for the alternate setting of multilayer being arranged between the shell 10 and the iron core 50, per dielectric layers
Oil duct 30 is formed between 20, the oil duct 30 is used to set transformer oil.
Fig. 1 is the top cross-sectional view of the isolating transformer, and the primary coil, the primary line are not shown in Fig. 1
Circle is wound in the surface of iron core 50 with the secondary coil 40, and the primary coil is located at the secondary coil in Fig. 1
On the direction of 40 vertical papers inwards.
The situation that dielectric layers 20 form an oil duct 30 is illustrate only in Fig. 1, and the application is to the insulating barrier 20
Quantity do not limit, the insulating barrier 20 can also be three layers, four layers or five layers, in theory will, the insulating barrier 20
The quantity of the oil duct 30 of quantity and its composition is more, and the dielectric strength of the isolating transformer will be higher, the insulating barrier 20
Particular number can be depending on the requirement of the volume and compressive resistance of the isolating transformer.
It should be noted that it is wrapped in the insulating paper 60 outside the secondary coil 40, is arranged on the shell 10 and institute
The oil duct 30 that the insulating barrier 20 of the alternate setting of the multilayer between iron core 50 and every two layers of insulating barrier 20 are formed is stated to constitute
The pressure-resistance structure of the isolating transformer, it is more equal that the pressure-resistance structure is distributed the high voltage electric field inside the isolating transformer
It is even, so as to greatly improve the compressive resistance of the isolating transformer, ensureing that it is higher pressure-resistant that the isolating transformer has
On the basis of intensity, the dosage of the transformer oil needed for the isolating transformer can be reduced, and then reduce the isolation transformation
Design space needed for device, reduce the volume and total quality of the isolating transformer.
In addition, the oil duct 30 between insulating barrier 20 described in multilayer and every two layers of insulating barrier 20 can not only improve insulation
Grade, local small electric discharge phenomena are reduced to greatest extent, and the dosage of transformer oil can be greatly reduced, reduce due to becoming
The influence of dielectric strength of the depressor oil with the pressure-resistant Quality Down of increase of run time and to the isolating transformer.
Further, the insulating paper 60 in the pressure-resistance structure is improving the same of the dielectric strength of the isolating transformer
When, the water absorption rate of the isolating transformer can also be greatly reduced, improves dielectric strength.
The shell 10 can also be the shell 10 of the other shapes such as cylindrical shell 10 with longitudinal casing 10,
It is preferable to employ shell 10 of the cylindrical shell 10 as the isolating transformer, cylindrical shell 10 can ensure the shell
The distance between 10 and the secondary coil 40 are uniform, avoid due to the distance between the shell 10 and the secondary coil 40
Difference caused by everywhere the different situation of compressive resistance occur.
It should also be noted that, except in the oil duct 30 set transformer oil in addition to, outermost insulating barrier 20 with
Transformer oil can also be set between the shell 10, change most can also be set between the insulating barrier 20 and the iron core 50 of inner side
Depressor oil, to make full use of the space of the isolating transformer, lifts the stress levels of the isolating transformer.
On the basis of above-described embodiment, in the preferred embodiment of the application, the shell 10 is exhausted for cylinder
Edge shell 10.
Shell 10 of the generally use metallic material shell 10 as the isolating transformer in the prior art, outside metal material
Inevitably be present localized metallic tip in the inwall of shell 10, when the builtin voltage of the isolating transformer is very high, easily go out
Existing secondary coil 40 and metal tip electrion, the situation for puncturing transformer oil occur.
But the pressure-resistance structure in the present embodiment, is not use only to avoid the secondary coil 40 and the shell 10
Between there is the possibility of electrion, and using shell 10 of the cylindrical insulation crust 10 as the isolating transformer, from
Fundamentally prevent electric discharge phenomena of the secondary coil 40 to the shell 10.
Preferably, the shell 10 is cylindrical epoxy shell 10, and in the present embodiment, the shell 10 uses epoxy material
One-shot forming is cylindrical epoxy shell 10 to material at high temperature.
On the basis of above-described embodiment, in another preferred embodiment of the application, the multilayer dielectric layer 20 is
Epoxy sleeve.
Epoxy material refers to the material that oxygen atom is added among carbochain, such as common oxirane, epoxy resin etc.,
Epoxy material has preferable insulating properties, plasticity and relatively low cost, is the preferred material as the shell 10.
On the basis of above-described embodiment, in another preferred embodiment of the application, as shown in Figures 2 and 3, also wrap
Include：
It is arranged between the top of shell 10 and the iron core 50, for setting the fixed iron core 50, and isolates institute
The epoxy mounting plate 70 of voltage between stating at the top of the shell 10 of iron core more than 50.
Fig. 2 is the top cross-sectional view of the isolating transformer, does not mark the oil duct 30 in fig. 2, Fig. 3 is the isolation
The schematic appearance of transformer, the top of the shell 10 not shown in Fig. 3.
Likewise, the epoxy mounting plate 70 is still prepared using epoxy material, in the same of the fixation iron core 50
When, the dielectric strength between the secondary coil 40 and the top of the shell 10 is added, avoids the occurrence of the secondary coil 40
The phenomenon struck sparks between the top of shell 10.
On the basis of above-described embodiment, in one embodiment of the application, the primary coil is segmentation coiling
Cylindrical coil.
The secondary coil 40 is the cylindrical coil of segmentation coiling.
Segmentation coiling refers to when carrying out coil winding, and N deciles while coiling (N >=2) are carried out to iron core 50, so can be with
The degree of irregularity of the coil of coiling is reduced, makes the electric field point between the cylindrical coil and the iron core 50 of the segmentation coiling
Cloth is more uniform.
Preferably, N takes 3, will the surface of iron core 50 be divided into three regions from top to bottom, in these three regions simultaneously
Carry out coiling.
On the basis of above-described embodiment, in another embodiment of the application, the cylindrical wires of the segmentation coiling
Enclose to be segmented the cylindrical copper foil of coiling.
Cylinder is turned to by section as the primary coil and secondary coil 40 of the isolating transformer in reality by the use of copper foil
Now while uniform coiling, the surface area of the primary coil and secondary coil 40 can also be increased, increase the primary coil
The thickness of transformer oil reservoir between the secondary coil 40 so that the electricity that can be born between primary coil and secondary coil 40
Compressive Strength can reach 1000KV-3000KV, further increase the dielectric strength of the isolating transformer.
In summary, the embodiment of the present application provides a kind of isolating transformer, and the isolating transformer is wrapped in described time
Insulating paper 60, the insulating barrier for the alternate setting of multilayer being arranged between the shell 10 and the iron core 50 outside level coil 40
20 and the oil duct 30 that forms of every two layers of insulating barrier 20 constitute the pressure-resistance structure of the isolating transformer, the pressure-resistant knot
It is more uniform that structure is distributed the high voltage electric field inside the isolating transformer, so as to greatly improve the resistance to of the isolating transformer
Compressive Strength, on the basis of ensureing that the isolating transformer has higher compressive resistance, the isolating transformer can be reduced
The dosage of required transformer oil, and then the design space needed for the isolating transformer is reduced, reduce the isolating transformer
Volume and total quality.
In addition, the oil duct 30 between insulating barrier 20 described in multilayer and every two layers of insulating barrier 20 can not only improve insulation
Grade, local small electric discharge phenomena are reduced to greatest extent, and the dosage of transformer oil can be greatly reduced, reduce due to becoming
The influence of dielectric strength of the depressor oil with the pressure-resistant Quality Down of increase of run time and to the isolating transformer.
Further, the insulating paper 60 in the pressure-resistance structure is improving the same of the dielectric strength of the isolating transformer
When, the water absorption rate of the isolating transformer can also be greatly reduced, improves dielectric strength.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (8)
1. a kind of isolating transformer, including：Shell, the iron core for being arranged at the enclosure, primary coil and secondary coil, its
It is characterised by, in addition to：
Wrap up the insulating paper of the secondary coil；
The insulating barrier for the alternate setting of multilayer being arranged between the shell and the iron core, often form oil between dielectric layers
Road, the oil duct are used to set transformer oil；
The insulating barrier is identical with the cross sectional shape of shell, specifically, the cross sectional shape of insulating barrier described in multilayer and shell is all
Insulating barrier described in identical and multilayer is set with housing nests.
2. isolating transformer according to claim 1, it is characterised in that the shell is cylindrical insulation crust.
3. isolating transformer according to claim 2, it is characterised in that the shell is cylindrical epoxy shell.
4. isolating transformer according to claim 1, it is characterised in that the multilayer dielectric layer is epoxy sleeve.
5. isolating transformer according to claim 1, it is characterised in that also include：
It is arranged between the cover top portion and the iron core, for setting the fixed iron core, and isolates the iron core and institute
State the epoxy mounting plate of voltage between cover top portion.
6. isolating transformer according to claim 1, it is characterised in that the primary coil is the cylinder of segmentation coiling
Coil.
7. isolating transformer according to claim 1, it is characterised in that the secondary coil is the cylinder of segmentation coiling
Coil.
8. the isolating transformer according to claim 6 or 7, it is characterised in that it is described segmentation coiling cylindrical coil be
It is segmented the cylindrical copper foil of coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227930.6A CN106783027B (en) | 2016-12-27 | 2016-12-27 | A kind of isolating transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227930.6A CN106783027B (en) | 2016-12-27 | 2016-12-27 | A kind of isolating transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783027A CN106783027A (en) | 2017-05-31 |
| CN106783027B true CN106783027B (en) | 2018-04-10 |
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ID=58921881
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611227930.6A Expired - Fee Related CN106783027B (en) | 2016-12-27 | 2016-12-27 | A kind of isolating transformer |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800123B (en) * | 2017-11-13 | 2019-11-15 | 北京交通大学 | A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor |
| DE102020204661A1 (en) | 2020-04-14 | 2021-10-14 | Siemens Aktiengesellschaft | 1Electric device with a dented shell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814637Y (en) * | 2005-07-19 | 2006-09-06 | 福州天宇电气股份有限公司 | Electric transformer |
| CN101136281A (en) * | 2006-08-28 | 2008-03-05 | Abb技术有限公司 | High voltage transformer with a shield ring, a shield ring and a method of manufacture same |
| CN102208262A (en) * | 2011-03-23 | 2011-10-05 | 曾祥军 | Transformer with grade-insulation structure |
| CN104124039A (en) * | 2014-06-23 | 2014-10-29 | 湖北网安科技有限公司 | Oil-immersed type high-overload power transformer |
-
2016
- 2016-12-27 CN CN201611227930.6A patent/CN106783027B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814637Y (en) * | 2005-07-19 | 2006-09-06 | 福州天宇电气股份有限公司 | Electric transformer |
| CN101136281A (en) * | 2006-08-28 | 2008-03-05 | Abb技术有限公司 | High voltage transformer with a shield ring, a shield ring and a method of manufacture same |
| CN102208262A (en) * | 2011-03-23 | 2011-10-05 | 曾祥军 | Transformer with grade-insulation structure |
| CN104124039A (en) * | 2014-06-23 | 2014-10-29 | 湖北网安科技有限公司 | Oil-immersed type high-overload power transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106783027A (en) | 2017-05-31 |
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