CN107039159A - Electric winding, the dry-type transformer with electric winding and the method for manufacturing electric winding - Google Patents
Electric winding, the dry-type transformer with electric winding and the method for manufacturing electric winding Download PDFInfo
- Publication number
- CN107039159A CN107039159A CN201610821938.9A CN201610821938A CN107039159A CN 107039159 A CN107039159 A CN 107039159A CN 201610821938 A CN201610821938 A CN 201610821938A CN 107039159 A CN107039159 A CN 107039159A
- Authority
- CN
- China
- Prior art keywords
- winding
- coating
- electric winding
- pressure side
- dry
- 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
Links
Classifications
-
- 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
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
-
- 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
-
- 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
-
- 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
-
- 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
- H01F2027/329—Insulation with semiconducting layer, e.g. to reduce corona effect
Abstract
The method of dry-type transformer and manufacture electric winding the present invention relates to electric winding, with electric winding.It is used for the electric winding (10,20) of dry-type transformer (1) the present invention relates to a kind of, it also allows for constructing compact dry-type transformer (1) in the case where voltage class is higher.There are the multiple windings for being wound in coil (15) of winding conductor (11) for this electric winding (10,20).In the embedded solid insulator (12) of coil (15).It is set to according to the present invention, applies the coating (14) being constructed from a material that be electrically conducting on the surface (13) of insulator (12).
Description
Technical field
The present invention relates to a kind of electric winding for dry-type transformer.
Background technology
Dry-type transformer, especially ast resin transformer, are power transformers, and it is used in high pressure in energy technologies
Side conversion is until about 36kV voltage.In such transformer, low-pressure side winding and high-pressure side winding are co-axially around iron
The leg arrangement of core.Winding with low voltage is referred to here as low-pressure side winding, and the winding with high voltage is referred to as height
Press side winding.In the case of the winding of high-pressure side it is this usually using resin-cast in the fixed insulating materials of two windings insertion.
Known such dry-type transformer from the 779B1 of EP 1 133.
If such dry-type transformer will be configured to the voltage higher than 36kV, result its than low pressure class change
Depressor is significantly larger, because must especially increase the distance between high-pressure side winding and low-pressure side winding.
The content of the invention
From the background, technical problem of the invention is to propose that a kind of electric winding, dry type for dry-type transformer becomes
Depressor and the method for manufacturing electric winding, it can realize the cramped construction of dry-type transformer.
The electric winding of dry-type transformer, especially high-pressure side winding are provided for for this, it has winding conductor, and winding is led
Body is wound in coil with multiple windings.Winding conductor can be thin film conductor, band conductor or line conductor herein.Coil be embedded into by
In the insulator that fixed insulating materials is constituted.Usually this uses casting resin, using the casting resin molded coil simultaneously
And the resin is in the after-hardening of cast.As a result the winding of the mechanically stable of hollow cylinder form is obtained, its coil is fine
Ground is protected from ambient influnence.According to the present invention, apply the coating being made of an electrically conducting material on the surface of insulator.In ability
Domain and in the sense of the present invention, when electrical conductivity is more than 10-8During every meter of Siemens (S/m, Siemens pro Meter), material
It is looked at as conduction.Material is looked at as insulator or non-conductive during less than described value.Coating should apply at least to insulation
In the interior facings of body, preferably also it is applied on end face.Particularly preferred coating is applied in the whole surface of insulator, that is, is removed
It is also applied to outside interior facings and end face in outer cover.By such coating, the electric field of electric winding is as far as possible in cast tree
Reduce in fat, therefore be lowered to outside winding following size, the size allows, other components to transformer,
The distance of such as iron core or low-pressure side winding is it is possible thereby to smaller, and this can realize greater compactness of structure.
Preferably, coating is made up of semi-conducting material.When the resistivity of material is more than 10-8Every meter of Siemens and it is less than
10-6During every meter of Siemens, in this area and in the sense of the present invention, material is counted as semiconductor.Because the conduction of winding
The conductive coating formation short-circuited winding of coating, especially whole surface, so electric current is flowed through in the short-circuited winding, electric current production
Raw power attenuation.The power attenuation can be limited using the coating being made up of semi-conducting material.
For example cable or conductor are widely known for from the A1 of US 2015/0243409A1 or DE 10 2,005 018 615
The suitable conductive or semiconductive coating of coating.It includes conduction or semiconductive particle generally in carrier material.
The electrical conductivity of coating can be adjusted in wide scope by the material, thickness and size of particle.
Preferred coatings have 102Ω/ to 105Ω/, preferably 103Ω/ to 104Ω/ sheet resistance rate, also referred to as
For surface resistivity.The sheet resistance rate should electric winding have under new state.Due to aging, ambient influnence or
Pollution, it can change.On the one hand the sheet resistance rate of the order of magnitude particularly effectively limits power attenuation, but on the other hand exists
Sheet resistance rate still provides enough surpluses in the case of being reduced due to pollution.
In a preferred embodiment of the invention, coating is applied by spraying process.This aspect ensure that uniform thickness,
On the other hand the bubble of shelf depreciation can be caused by preventing.
It is considered as advantageously, coating electrical ground.Thus the electric field outside winding is particularly effectively reduced.
Above-mentioned technical problem is also solved by a kind of dry-type transformer.Such dry-type transformer has the leg around iron core
The low-pressure side winding of arrangement and in the outside high-pressure side winding for being concentrically surrounding low-pressure side winding arrangement.Herein at least high-pressure side around
Group is electric winding as described above.
Above-mentioned technical problem is also solved by a kind of method for being used to manufacture electric winding.Method and step is herein：
Winding conductor is wound in coil with multiple windings first.
Then coil is embedded in fixed insulator, preferably by casting resin molded coil, after-hardening.
Then the coating being constructed from a material that be electrically conducting is applied on the surface of the insulator.
As described above, coating can be applied on the whole surface or only on the part on surface herein.By such
Method can manufacture electric winding, and its electric field coated as far as possible is shielded, and it is used in dry-type transformer, thus, it is possible to
Realize compact structure.Preferred coatings are paints.The application of coating herein can by injection, spraying, brush, roller coat or dip-coating come
Carry out.
Preferred coatings are made up of semi-conducting material.
Particularly preferred coating is applied with spraying method, it is possible thereby to realize especially uniform thickness.
Brief description of the drawings
The present invention is explained in detail below in conjunction with accompanying drawing.Herein
Fig. 1 shows the half-sectional view of known dry-type transformer,
Fig. 2 shows the half-sectional view of the dry-type transformer according to the present invention,
Fig. 3 shows the flow chart of the method according to the present invention.
Corresponding part has identical reference in all of the figs mutually.
Embodiment
Fig. 1 shows the half-sectional view of conventional dry-type transformer 50.Around iron core leg 30, it is concentrically surrounding by iron core
The longitudinal axis 40 that leg 30 extends outwards arranges low-pressure side winding 20, insulation scapus 23, high-pressure side winding 51 and shielding from iron core leg 30
Device 24.Generally, dry-type transformer 50 has the iron core with three such iron core legs 30.
Low-pressure side winding 20 is generally configured film winding.Thin electrically conductive film 21 is wound on winding iron core herein low
Press side winding.Insulator film is entangled between each winding layers of electrically conductive film.Alternatively, electrically conductive film can also have insulating barrier.
Low-voltage side coil is poured into a mould using casting resin after the winding process.Alternatively, utilization can be entangled between each winding layers
The intermediate layer 22 of prepreg dipping, it is hardened after the winding process.Stable hollow cylinder is all obtained in both cases
Body winding body.
High-pressure side winding 51 is configured to coiling group.It is usually the spiral shape in one plane first of conductor 11 of banding for this
Ground is wound on winding iron core around winding axle turns into disk coil.Concatenation is coil to multiple disk coils so stacked mutually mutually
15.Then coil 15 utilizes casting resin cast so that whole coil 15 is surrounded by casting resin.Then the insertion of coil 15 conduct
In the casting resin of insulator 12.
The hollow cylinder high-pressure side winding 51 that is so formed generally has the diameter bigger than low-pressure side winding 20, thus from
Iron core leg 30, which is seen, to be arranged in outside low-pressure side winding 20.
In the air gap formed between low-pressure side winding 20 and high-pressure side winding 51 as cylindrical cavity, can arrange by
The insulated column 23 of electrically insulating material manufacture.Its one side be used for carry out electrical shielding, on the other hand for high-pressure side winding 51 with it is low
Press the hot decoupling of side winding 20.
The main electric field formed by the voltage being applied on high-pressure side winding 51, mainly in high-pressure side winding 51 and low pressure
Reduce in air gap between side winding 20.Therefore, the size of air gap must be corresponding with the voltage being applied on high-pressure side winding 51.
In the case where voltage is higher, air gap is also correspondingly larger.Air gap is used to cool down high-pressure side winding and low-pressure side winding in addition, side
Method is to ventilate convection current or to pass through the winding in the electrically driven (operated) mode of machine.
Furthermore, it is possible to the conductive shield device 24 generally manufactured in the disposed outside of high-pressure side winding 51 by metal, it is grounded
And it is to touch safety to cause dry-type transformer 1, because nigh personnel thus without contacting high-pressure side winding 51 again
High electric field.In order that screening arrangement 24 does not form short-circuited winding, it does not allow by round sealed, but between must having axial direction
Gap.
Fig. 2 shows the dry-type transformer 1 according to the present invention, and the difference of itself and known dry-type transformer 50 is essentially consisted in
High-pressure side winding 10.The basic structure of high-pressure side winding 10 is similar to Fig. 1.Coil 15 is constructed samely.It is as above retouched
In the insulator 12 that also insertion is for example made up of casting resin as stating.But except that will be conducting or semiconducting
Coating 14 is applied on the surface of insulator 12.The coating surround herein insulator 12 by interior facings 16, the and of outer cover 17
The whole surface of the formation of end face 18.But it is also contemplated that, coating 14 is applied only in interior facings 16 or the He of interior facings 16
On end face 18.Coating 14 is preferably painted and can applied according to common spraying process.
Coating 14 now causes the electric field of high-pressure side winding 10 almost to disappear completely in the insulator 12 of high-pressure side winding 10
Remove.Voltage is produced according to sheet resistance rate on the surface of coating 14, the voltage is approximately corresponding to the voltage of low-pressure side winding 20
The order of magnitude.It is possible thereby to reduce the gap between high-pressure side winding 10 and low-pressure side winding 20.The gap is now actually not
There is Electricity Functional again, and almost can determine size according only to desired cooling power.
Preferred coatings 14 are connected at a position with earth potential.In the Fig. 2 shown example, coating 14 is in lower surface
It is grounded on 18.If coating 14 is constructed from a material that be electrically conducting, actually the whole surface of coating 14 is in earth potential.If coating
14 are made up of semi-conducting material, then form voltage's distribiuting on the surface of coating 14.At the position of ground connection, voltage is zero,
At another point away from the position on surface, ceiling voltage is produced.The thin layer for depending mainly on the size of coating 14 of the voltage
Resistivity.
Fig. 3 is shown for manufacturing the electric winding 10,20 for dry-type transformer 1, preferably fabricated to be used for dry-type transformer
High-pressure side winding 10 according to the present invention method flow chart.In method and step 101, first by winding conductor 11 with many
Individual winding is wound in coil 15.Then, in method and step 102, such as by using casting resin molded coil 15 and make
Casting resin is hardened, and coil 15 is embedded in solid insulator 12., will be by conductive material structure in subsequent method and step 103
Into coating 14 be applied on surface 13, be preferably applied in the whole surface 13 of insulator 12.
Reference numerals list
1 dry-type transformer
10 high-pressure side windings
11 winding conductors
12 insulators (casting resin)
13 insulator surfaces
14 coatings
15 high pressure lateral coils
Facings in 16
17 outer covers
18 end faces
20 low-pressure side windings
21 electrically conductive films
22 insulation (prepreg)
23 insulated columns
24 screening arrangements
30 legs (iron core)
40 longitudinal axis
50 transformers (SdT)
51 high-pressure side windings (SdT)
Claims (11)
1. one kind is used for the electric winding (10,20) of dry-type transformer (1), especially high-pressure side winding (10), with winding conductor
(11), the winding conductor is wound in coil (15) with multiple windings, wherein, in the embedded solid insulator (12) of coil (15),
Characterized in that,
Apply the coating (14) being constructed from a material that be electrically conducting on the surface (13) of insulator (12).
2. electric winding (10,20) according to claim 1, it is characterised in that
The surface (13) of insulator (12) is completely covered in the coating (14).
3. electric winding (10,20) according to claim 1 or 2, it is characterised in that
The coating (14) is made up of semi-conducting material.
4. electric winding (10,20) according to any one of claim 1 to 3, it is characterised in that
The surface resistivity of the coating (14) is 102Ω/ to 105Ω/, preferably 103Ω/ to 104Ω/□。
5. electric winding (10,20) according to any one of claim 1 to 4, it is characterised in that the coating (14) passes through
Spraying method applies.
6. electric winding (10,20) according to any one of claim 1 to 5, it is characterised in that the coating (14) connects
Ground.
7. a kind of have the low-pressure side winding (20) of leg (30) arrangement around iron core and be concentrically surrounding the low-pressure side winding cloth
The dry-type transformer (1) for the high-pressure side winding (10) put, wherein, high-pressure side winding (10) is according to any in claim 1 to 6
Electric winding (10) described in.
8. the method for one kind manufacture electric winding (10,20), with following method and step：
- winding conductor (11) with multiple windings is wound in coil (15),
- poured into a mould preferably by casting resin, coil (15) is embedded in solid insulator (12),
- coating being constructed from a material that be electrically conducting (14) is applied on the surface of insulator (12) (13).
9. method according to claim 8, it is characterised in that
The coating (14) is applied in the whole surface of insulator (12) (13).
10. method according to claim 8 or claim 9, it is characterised in that the coating (14) is made up of semiconductive material.
11. the method according to any one of claim 8 to 10, it is characterised in that
The coating (14) is applied with spraying method.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15185886.7 | 2015-09-18 | ||
| EP15185886.7A EP3144944A1 (en) | 2015-09-18 | 2015-09-18 | Electrical winding, dry transformer with such an electrical winding, and method for production of an electrical winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107039159A true CN107039159A (en) | 2017-08-11 |
Family
ID=54150329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610821938.9A Pending CN107039159A (en) | 2015-09-18 | 2016-09-13 | Electric winding, the dry-type transformer with electric winding and the method for manufacturing electric winding |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3144944A1 (en) |
| CN (1) | CN107039159A (en) |
| BR (1) | BR102016020804A8 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019232763A1 (en) | 2018-06-07 | 2019-12-12 | Siemens Aktiengesellschaft | Shielded coil assemblies and methods for dry-type transformers |
| CN112639488A (en) * | 2018-07-20 | 2021-04-09 | 西门子能源全球有限公司 | Device with coiled strand and method for producing same |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016202391A1 (en) | 2016-02-17 | 2017-08-31 | Siemens Aktiengesellschaft | Compact dry-type transformer with an electrical winding and method for producing an electrical winding |
| DE102016202385A1 (en) | 2016-02-17 | 2017-08-17 | Siemens Aktiengesellschaft | Compact dry-type transformer with an electrical winding and method for producing an electrical winding |
| DE102017221593A1 (en) * | 2017-11-30 | 2019-06-06 | Siemens Aktiengesellschaft | winding arrangement |
| DE102018213661A1 (en) | 2018-08-14 | 2020-02-20 | Siemens Aktiengesellschaft | Winding arrangement with field smoothing and reinforcement |
| CN116137200A (en) * | 2021-11-16 | 2023-05-19 | 华为数字能源技术有限公司 | Transformer and power equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1156369A (en) * | 1966-04-08 | 1969-06-25 | Gen Electric | Coated Electrostatic Shields for Electrical Apparatus |
| EP0061608A1 (en) * | 1981-04-01 | 1982-10-06 | Smit Transformatoren B.V. | Air-cooled dry type transformer or inductance |
| CN1471715A (en) * | 2000-08-29 | 2004-01-28 | ABB�ɷ�����˾ | Electric device |
| CA2285806C (en) * | 1998-10-20 | 2010-08-10 | France Transfo | Dry-type distribution and power transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19854439C2 (en) | 1998-11-25 | 2000-10-12 | Siemens Ag | Transformer - especially cast resin transformer |
| DE102005018615B4 (en) | 2004-05-17 | 2016-03-10 | Merck Patent Gmbh | Transparent conductive pigments |
| WO2015130692A2 (en) | 2014-02-25 | 2015-09-03 | Essex Group, Inc. | Insulated winding wire containing semi-conductive layers |
-
2015
- 2015-09-18 EP EP15185886.7A patent/EP3144944A1/en not_active Ceased
-
2016
- 2016-09-09 BR BR102016020804A patent/BR102016020804A8/en not_active Application Discontinuation
- 2016-09-13 CN CN201610821938.9A patent/CN107039159A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1156369A (en) * | 1966-04-08 | 1969-06-25 | Gen Electric | Coated Electrostatic Shields for Electrical Apparatus |
| EP0061608A1 (en) * | 1981-04-01 | 1982-10-06 | Smit Transformatoren B.V. | Air-cooled dry type transformer or inductance |
| CA2285806C (en) * | 1998-10-20 | 2010-08-10 | France Transfo | Dry-type distribution and power transformer |
| CN1471715A (en) * | 2000-08-29 | 2004-01-28 | ABB�ɷ�����˾ | Electric device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019232763A1 (en) | 2018-06-07 | 2019-12-12 | Siemens Aktiengesellschaft | Shielded coil assemblies and methods for dry-type transformers |
| CN112639488A (en) * | 2018-07-20 | 2021-04-09 | 西门子能源全球有限公司 | Device with coiled strand and method for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| BR102016020804A2 (en) | 2017-03-28 |
| BR102016020804A8 (en) | 2023-04-25 |
| EP3144944A1 (en) | 2017-03-22 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |