CN1156860C - Air-core primary voltage winding - Google Patents
Air-core primary voltage winding Download PDFInfo
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- CN1156860C CN1156860C CNB961804505A CN96180450A CN1156860C CN 1156860 C CN1156860 C CN 1156860C CN B961804505 A CNB961804505 A CN B961804505A CN 96180450 A CN96180450 A CN 96180450A CN 1156860 C CN1156860 C CN 1156860C
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Abstract
The present invention relates to high-voltage winding which comprises a conducting wire winding coated with an insulating outer layer. The present invention is characterized in that the winding [1] is clad by high-voltage insulating thermoplastic resin [2]; the winding also comprises a potential fixed conductive surface layer [3] deposited on the cladding layer, wherein the thermoplastic resin of the surface layer consists with the thermoplastic resin of the insulating cladding layer [2].
Description
The present invention relates to the high pressure winding, relate more specifically to can be used as that class winding of dry-type transformer high pressure winding.
The high pressure winding that is used for this class purposes must be able to stand the voltage of 5KV to 36KV.
People are known, scribble the heat cured insulation material layer on the winding in solid insulating transformer or the dry-type transformer, and has sizable space to guarantee reaching at winding between winding and the insulation function electrical ground, this has increased its overall dimension, its total quality, and thereby has improved its cost.
For addressing this problem, some producers use the winding of surface metalation to reduce the overall dimension of equipment.
But to be expense big and be difficult to carry out for the shortcoming of this technology.
Mainly contain two kinds of dry-type transformers at present, coating type transformer and impregnated transformer.The preparation method of these utensils is different certainly, but the common trait of the insulating material that uses is heat setting, and need polymerization under the temperature that improves, and causes manufacturing cost to improve.
The objective of the invention is to overcome the above-mentioned shortcoming of dry insulation utensil, this realizes by making a kind of high pressure winding, and the performance of this high pressure winding performance with the low dry insulation equipment of known manufacturing expense at least is good equally, and has higher processing safety.
Thereby the present invention includes a kind of high pressure winding, this high pressure winding comprise have the insulation crust coating the lead winding, it is characterized in that described winding has High-Voltage Insulation plastic resin coating hot in nature, and the current potential that this winding also comprises thermoplastic resin is conductive surface layer fixedly, and this superficial layer thermoplastic resin is compatible with the insulating barrier thermoplastic resin that deposits on insulating barrier.
According to further feature of the present invention:
-this winding comprises the insulating layer and thermoplastic resin side band compatible with the winding insulation material coating, the thickness of described side band is higher than insulating barrier, and this side band covers the bonding conductor of winding, and the aperture that is provided with in the end of insulating barrier and promising bonding conductor on cover tape makes them to be connected with other assembly;
-described insulating barrier resin is selected from the group that following material is formed: the 6-6 polyamide, the 6-polyamide, 4,6 polyamide, 12,12 polyamide, the 6-12 polyamide, the polyamide that contains aromatic monomer, polybutylene terephthalate (PBT), PTT, PEN, the liquid crystal polymer, poly terephthalic acid hexamethylene dimethyl ester, copolyether ester, polyphenylene sulfide, polyacylics, polypropylene, polyethylene, polyacetals, polymethylpentene, Polyetherimide, Merlon, polysulfones, polyether sulfone, polyphenylene oxide, polystyrene, styrol copolymer, and styrene and the mixture of rubber and the mixture of graft copolymer and above-mentioned substance;
-insulating barrier thermoplastic resin is a PETG;
-in polyethylene terephthalate, be added with glass fibre;
The thickness of-insulating barrier thermoplastic resin is 3mm to 50mm;
-current potential fix (potential fixing) layer conductive thermoplastic resin in contain carbon;
-described winding constitutes the high pressure winding of dry-type transformer.
The present invention also comprises the method for preparing the high pressure winding, it is characterized in that this method comprises:
-the lead that scribbles electric insulation layer of reeling forms hollow garden cylindricality winding;
-in first mould, with first coating of the molded winding of electric insulation thermoplastic resin so that the thickness of the electric insulation thermoplastic resin that obtains is enough to make winding and exterior insulation,
-in second mould, molded fixedly second coating of conductive thermoplastic resin layer of current potential that is on the winding that has the electric insulation thermoplastic resin.
According to further feature of the present invention, the coating stage in first mould comprises:
-winding is placed the cavity of mould, described mould has inlet, exhaust outlet and is used for the bar of supporting object at mould inside;
-mobile support bar makes it to contact to support winding in cavity with winding;
-in mould, inject the electric insulation thermoplastic resin through inlet;
-before solidifying along support bar, the thermoplastic resin that injects cavity extracts support bar out to prevent forming the hole at the electric insulation thermoplastic resin from cavity;
-when resin is full of mould, make air by exhaust outlet overflow cavity and
-continue to inject the electric insulation thermoplastic resin to be filled until mould, form the electric insulation thermoplastic resin, this layer does not in fact have the hole and its thickness is enough to make winding and exterior insulation;
-continue to inject the electric insulation thermoplastic resin until the uniform thickness that on the external diameter of winding and internal diameter, obtains being at least 3mm, and till the axle head of winding obtains being at least the uniform thickness of 2.5mm;
-apply second layer conductive thermoplastic resin layer by autoclave moulding.
By reading the following explanation that provides with by way of example and can better understanding the present invention, wherein with reference to accompanying drawing:
-Fig. 1 is the perspective view that the part excision is arranged of high pressure winding of the present invention;
-Fig. 2 is the profile of dry-type transformer, and high pressure winding wherein is made of the high pressure winding of Fig. 1.
Winding shown in the figure is the high pressure winding that can be particularly useful as dry-type transformer high pressure winding.
It mainly comprises lead winding 1, and this lead is insulated layer and covers.Be coated with High-Voltage Insulation thermoplastic resin 2 on the winding 1.
The thermoplastic resin that is used to form this coating advantageously is PETG, wherein can be loaded with the reinforcing glass fiber.
Described resin can also be selected from the group that following material is formed: the 6-6 polyamide, the 6-polyamide, 4, the 6-polyamide, 12,12 polyamide, the 6-12 polyamide, the polyamide that contains aromatic monomer, polybutylene terephthalate (PBT), PTT, PEN, the liquid crystal polymer, poly terephthalic acid hexamethylene dimethyl ester, copolyether ester, polyphenylene sulfide, polyacylics, polypropylene, polyethylene, polyacetals, polymethylpentene, Polyetherimide, Merlon, polysulfones, polyether sulfone, polyphenylene oxide, polystyrene, styrol copolymer, and styrene and the mixture of rubber and the mixture of graft copolymer and above-mentioned substance.
The thermoplastic resin thickness range of insulating barrier 2 can be 3mm to 50mm.
Also deposit surface conductance layer 3 and be used for fixing current potential on insulating resin layer 2, it is formed by the thermoplastic resin compatible with insulating barrier 2 thermoplastic resins.
Advantageously, current potential stationary heat plastic resin 3 contains carbon.
Described side band is provided with vertically, forms the thickness high than coating 2.It covers the bonding conductor 5,6 of winding and the interconnecting piece of winding.Corresponding aperture 7,8 around conductor 5,6 is arranged at insulating barrier 2 with on cover tape 4, provide passage to make them to be connected for the end of bonding conductor 5,6 with unshowned other parts.
Between two apertures 7,8, be an additional aperture 10 corresponding to bonding conductor 5,6, what therefrom stretch out is the projection of conductor 11, described conductor 11 constitutes the intermediate ends of windings 1, and they can connect by unshowned bonding jumper, so that winding is suitable for using.
Except that sentencing, aperture 7,8,10 is coated with fixedly conductive surface layer 3 of current potential on the insulating layer and thermoplastic resin side band 4.
The aperture 7,8 of the bonding conductor of winding is adapted to cooperate with unshowned insulating part, and guarantees the fixedly continuity of conductive layer of coating and current potential, and described insulating part is for example around connecting the busbar terminal.
Give middle aperture 10 that the conductor 11 be used for regulating winding provides passage advantageously with the insulating material plug (not shown) sealing that scribbles conductive layer, with the continuity of the conductive layer 3 that guarantees covering winding integral body.
Figure 2 shows that around the outline of hollow garden cylindricality winding 1 and the insulating layer and thermoplastic resinous coat 2 of interior profile.
This figure also clearly show cover the winding bonding conductor be with 4 also by fixedly conductive surface layer 3 coverings of current potential.
Resulting annular high pressure winding is particularly suitable for the high pressure winding as dry-type transformer.
The low pressure winding on the unshowned magnetic circuit post can be accepted to be arranged in its inner space 12.
Fig. 2 clearly illustrates that high pressure winding of the present invention constitutes the high pressure winding of dry-type transformer.
High pressure winding 1 links to each other with low pressure winding 15, and described low pressure winding 15 also is to do insulation, and it is arranged on the stratiform magnetic circuit post 16, between described high pressure winding and the low pressure winding sleeve 17 is arranged.Low pressure winding 15 for example is coated in thermoplastic resin and so on material 18, and has the axial ridge rib 19 that molding forms on its circumference, when contacting, define a passage 20, make cooling fluid such as air therefrom to flow through with the inner surface of the conductive resin layer 3 of high pressure winding 1.
For making the described high pressure winding of the present invention of Fig. 1 and 2, first step is the lead formation hollow garden cylindricality winding 1 of reeling and scribbling the electric insulation sheath.
In unshowned first mould, with first coating of the molded winding 1 of electric insulation thermoplastic resin so that the thickness of the electric insulation thermoplastic resin that obtains is enough to make winding and exterior insulation.
Subsequently, in unshowned second mould, molded fixedly second coating of conductive thermoplastic resin layer 3 of current potential that is on the winding that has electric insulation thermoplastic resin 2.
For in first mould, applying, winding 1 is placed the cavity of aforementioned mould, described mould has inlet, exhaust outlet and is used for the bar of supporting object at mould inside.
Mobile support bar contacts to support winding in mould cavity with winding 1 up to them.
Indoorly resin is preheated to resin produces the temperature that flows what be provided with injection screw.
In colder mould, inject the electric insulation thermoplastic resin through die entrance with high pressure.Waterpower can be used or pneumatic means applies high pressure.The pressure limit of injecting resin can be 35MPa to 138MPa, and temperature range can be about 200 ℃ to about 400 ℃.Before solidifying along support bar, the thermoplastic resin that injects cavity extracts support bar out to prevent forming the hole at the electric insulation thermoplastic resin from mould cavity.
In this operating process,, make air overflow mould cavity by exhaust outlet along with resin is filled mould.In fact, described exhaust outlet can be made of a plurality of holes in the zone, junction point of mould radial surface and axial surface.
Being configured as of first mould, the molten resin garden week inlet on mould inner surface enters mould.
Continue to inject the electric insulation thermoplastic resin till mould is filled, form electric insulation thermoplastic resin 2, this layer does not in fact have the hole and its thickness is enough to make winding and exterior insulation.
Advantageously continue to inject the electric insulation thermoplastic resin until the insulating barrier that on the internal diameter of winding 1 and external diameter, obtains being at least the 3mm uniform thickness, and the axle head of winding obtain being at least the 2.5mm uniform thickness insulating barrier till.
From first mould, shift out the winding that has its insulating barrier 2 then and detect to guarantee coating 2 no holes.
Can carry out this detection by any method in common, for example use the X-ray or when winding is switched on, measure the partial discharge that causes by the hole.
Term " does not in fact have the hole " and be meant that using electron microscope to can't see the hole exists here when using when multiplication factor is 1000.
When the coating operation that uses the electric insulation thermoplastic to carry out in first mould (also may form side band 4 by the molding of first mould therebetween, described side band 4 covers the bonding conductor 5,6 of windings and the aperture, middle part 10 that is provided with around the aperture 7,8 of these end conductors with for the conductor 11 of regulating winding) finish after, the product that is obtained is put into the second not shown mould, use the hot press molding method to come on the insulating layer and thermoplastic material layer, to apply second coating therein, this coating is the conductive thermoplastic resin layer, to obtain the current potential fixed table surface layer 3 of high pressure winding.
Before the coated with conductive thermoplastic resin, can add insulating layer and thermoplastic material side band 4 by hot pressing equally.
Claims (12)
1. high pressure winding, comprising have the insulation crust coating the lead winding, it is characterized in that described winding 1 has High-Voltage Insulation plastic resin coating 2 hot in nature, the current potential that its feature also is also to comprise thermoplastic resin is conductive surface layer 3 fixedly, this superficial layer thermoplastic resin is compatible with the thermoplastic resin of deposition on insulating barrier 2, described winding comprises and the compatible insulating layer and thermoplastic resin side band 4 of winding 1 insulation coating 2, the thickness of described side band is higher than insulating barrier, and this side band covers the bonding conductor of winding, its feature also be insulating barrier 2 and on cover tape 4 end 5 of promising bonding conductor, 6 apertures 7,8 that are provided with.
2. high pressure winding as claimed in claim 1, it is characterized in that described insulating barrier 2 resins are selected from the group that following material is formed: the 6-6 polyamide, the 6-polyamide, 4,6 polyamide, 12,12 polyamide, the 6-12 polyamide, the polyamide that contains aromatic monomer, polybutylene terephthalate (PBT), PTT, PEN, the liquid crystal polymer, poly terephthalic acid hexamethylene dimethyl ester, copolyether ester, polyphenylene sulfide, polyacylics, polypropylene, polyethylene, polyacetals, polymethylpentene, Polyetherimide, Merlon, polysulfones, polyether sulfone, polyphenylene oxide, polystyrene, styrol copolymer, and styrene and the mixture of rubber and the mixture of graft copolymer and above-mentioned substance.
3. winding as claimed in claim 1 or 2, the thermoplastic resin that it is characterized in that insulating barrier 2 is a PETG.
4. winding as claimed in claim 3 is characterized in that being added with glass fibre in PETG.
5. winding as claimed in claim 1 or 2, the thickness that it is characterized in that insulating barrier 2 thermoplastic resins is 3mm to 50mm.
6. high pressure winding as claimed in claim 1 or 2 is characterized in that containing carbon in the conductive thermoplastic resin of current potential fixed bed 3.
7. winding as claimed in claim 1 or 2 is characterized in that electroconductive resin and insulating coating are selected from identical materials, and also contain 20% to 70% carbon granule in electroconductive resin.
8. high pressure winding as claimed in claim 1 or 2 is characterized in that described winding constitutes the high pressure winding of dry-type transformer.
9. prepare the method for the high pressure winding of claim 1 or 2, it is characterized in that comprising:
-the lead that scribbles electric insulation layer of reeling forms hollow garden cylindricality winding 1;
-in first mould, with first coating of the molded winding of electric insulation thermoplastic resin so that the thickness of the electric insulation thermoplastic resin 2 that obtains is enough to make winding and exterior insulation,
-before coated with conductive cover layer 3, on insulating barrier, form insulating layer and thermoplastic resin side band 4 by hot pressing,
-in second mould, molded fixedly second coating 3 of conductive thermoplastic resin layer of current potential that is on the winding that has the electric insulation thermoplastic resin.
10. method as claimed in claim 9 is characterized in that the coating stage of finishing comprises in first mould:
-winding 1 is placed the cavity of mould, described mould has inlet, exhaust outlet and is used for the bar of supporting object at mould inside;
-mobile support bar makes it to contact to support winding in cavity with winding;
-in mould, inject the electric insulation thermoplastic resin through inlet;
-before solidifying along support bar, the thermoplastic resin that injects cavity extracts support bar out to prevent forming the hole at the electric insulation thermoplastic resin from cavity;
-when resin is full of mould, make air by exhaust outlet overflow cavity and
-continue to inject the electric insulation thermoplastic resin to be filled until mould, form till the electric insulation thermoplastic resin 2, this layer does not in fact have the hole and its thickness is enough to make winding and exterior insulation.
11. method as claimed in claim 10 is characterized in that continuing injecting the electric insulation thermoplastic resin until the uniform thickness that obtains being at least 3mm on the external diameter of winding and internal diameter, and till the axle head of winding obtains being at least the uniform thickness of 2.5mm.
12., it is characterized in that applying second layer conductive thermoplastic resin layer 3 by autoclave moulding as each method among the claim 9-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB961804505A CN1156860C (en) | 1996-09-04 | 1996-09-04 | Air-core primary voltage winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB961804505A CN1156860C (en) | 1996-09-04 | 1996-09-04 | Air-core primary voltage winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1239581A CN1239581A (en) | 1999-12-22 |
| CN1156860C true CN1156860C (en) | 2004-07-07 |
Family
ID=5127889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB961804505A Expired - Fee Related CN1156860C (en) | 1996-09-04 | 1996-09-04 | Air-core primary voltage winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1156860C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080061915A1 (en) * | 2006-09-11 | 2008-03-13 | Rodney Godbey | Dry-type transformer with shielded core/coil assembly and method of manufacturing the same |
| EP2797088A1 (en) * | 2013-04-23 | 2014-10-29 | ABB Technology AG | Coil for a dry transformer and dry transformer |
| 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 |
| CN109285649A (en) * | 2017-07-21 | 2019-01-29 | 平高集团有限公司 | Magnet ring pours dress, magnet ring casting mold and magnet ring and pours dress production method |
-
1996
- 1996-09-04 CN CNB961804505A patent/CN1156860C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1239581A (en) | 1999-12-22 |
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| CF01 | Termination of patent right due to non-payment of annual fee |