CN201478079U - Amorphous alloy distribution transformer and inner core thereof - Google Patents
Amorphous alloy distribution transformer and inner core thereof Download PDFInfo
- Publication number
- CN201478079U CN201478079U CN2009201657833U CN200920165783U CN201478079U CN 201478079 U CN201478079 U CN 201478079U CN 2009201657833 U CN2009201657833 U CN 2009201657833U CN 200920165783 U CN200920165783 U CN 200920165783U CN 201478079 U CN201478079 U CN 201478079U
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- amorphous alloy
- inner core
- distribution transformer
- coil
- alloy distribution
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Abstract
The utility model discloses an amorphous alloy distribution transformer and an inner core thereof. The inner core of the amorphous alloy distribution transformer comprises an iron core (1), coils (2) and a framework (3), wherein the amorphous alloy iron core (1) and the coils (2) are limited inside the framework (3), and a plurality of supporting plates (4) are arranged between the coils (2) and the iron core (1). The inner core of the amorphous alloy distribution transformer further comprises a first pressure plate (51) and a second pressure plate (52), wherein, the first pressure plate (51) is arranged between the upper surface and the lower surface of the framework (3); the second pressure plate (52) is arranged between the upper surfaces and the lower surfaces of the coils (2); both the whole first pressure plate (51) and the whole second pressure plate (52) take the shape of a strip and are respectively pressed on the upper surfaces and the lower surfaces of the three coils (2) respectively; the inner core adopts a piece of insulating paper for insulation; and the insulating paper is made of semi-solid composite flexible materials by coating modified epoxy resin on the surface of electrotechnical composite flexible materials which are used for electrical insulation and take the shape of a diamond. The amorphous alloy distribution transformer and the inner core thereof provided by the utility model have the advantages that the volume is small, the cost is low, and the temperature rise of the coils is low.
Description
Technical field
The utility model relates to a kind of transformer, is specifically related to a kind of amorphous alloy distribution transformer and inner core thereof.
Background technology
Amorphous alloy transformer is a kind of high-tech, environmental protection and energy saving product, and its energy-conservation and environmental-protection function is generally acknowledged by the world.At present, amorphous alloy transformer is technical reaching its maturity such as manufacturing, uses, it is high-effect, and (it is than ordinary silicon steel disc iron-core transformer, no-load loss descends about 75%), the excellent properties of environmental protection attractive in appearance won the consistent of users and praised highly and extensive favorable comment, is described as " the high-tech green product of the electric trend of our times ".
Usually, the structure of amorphous alloy transformer and common transformer is formed similar, comprises iron core, coil and corresponding lead terminal etc., if oil-filled transformer also comprises parts such as casing, radiator.Particularly for jumbo transformer, bulky, feasible installation, maintenance inconvenience, and also cost is higher.In addition, because the accident that the defective in the distribution transforming insulation causes distribution transforming to burn accounts for more than 70% of total rate of failure.By a large amount of distribution transforming accident analyses, conclusion is that the distribution transforming internal fault can be divided into hot fault and discharge property fault two big classes basically, and crosses hot fault also often because insulated local discharge is caused.Therefore, the service life of distribution transforming under the operating voltage effect be with its insulation system in have or not partial discharge that much relations are arranged, though with temperature rise substantial connection is arranged also, partial discharge is main.If partial discharge is weak more in the distribution transforming, then its service life is just long more.
At present, the general coil interlayer insulating material of transformer industry is the some glue insulating paper of 0.08mm, its puncture voltage requirement 〉=8kV/mm.For the transformer of 20kV, need more than ten 0.08mm point glue insulating paper.This insulating paper is used for the layer insulation and the turn-to-turn insulation of transformer, thereby has increased the volume of transformer, causes transformer installation, difficult in maintenance, and the manufacturing cost height.
The utility model content
The technical problems to be solved in the utility model is, at the deficiencies in the prior art, provides a kind of amorphous alloy distribution transformer and inner core thereof, makes that its volume is little, cost is low and coil temperature rise is low.
Technical problem to be solved by this invention is achieved by the following technical solution:
The utility model provides a kind of amorphous alloy distribution transformer inner core, comprising: iron core, and it is three-phase five-limb amorphous alloy core; Coil is a square coil, is enclosed within on the core limb; Framework, described iron core and coil are limited in the described framework, and, leave the space between described coil and the iron core, in this space, be provided with a plurality of insulation boards, comprise that also the integral body of first pressing plate and second pressing plate all is strip, is pressed in respectively on the upper and lower surface of described three coils at first pressing plate between the upper surface of described framework and described coil, second pressing plate between the lower surface of described framework and described coil; The insulating paper that core insulation adopts in described is form diamond checks by the epoxy resin with modification and is coated in the electrician and makes with the semi-solid preparation composite flexible material that forms on the composite flexible material surface of insulating.
Described inner core insulation comprises layer insulation and turn-to-turn insulation.
Puncture voltage 〉=the 60kV/mm of the insulating paper that core insulation adopts in described.
The temperature resistant grade of the insulating paper that core insulation adopts in described is the F level.
Alternatively, amorphous alloy distribution transformer inner core of the present utility model can also comprise and is pressed in the cushion block that three coils are positioned at part unshakable in one's determination inner.
In this amorphous alloy distribution transformer inner core, described framework comprises upper clamping piece, lower clamping piece and side folder, and described upper clamping piece, lower clamping piece and side folder are fixed together by securing member, thereby forms general frame.The transformer adopting tower structure mainly adopts connecting frame, helps assembling and control rigging error.
The primary side voltage of described coil of the present utility model can be 20kV.
Preferably, the length and width ratio of described coil is 1.4～1.6: 1.
Especially, the length and width ratio of described coil is preferably 1.55: 1.Like this, can reduce no-load loss and noise and material-saving effectively.
The utility model also provides a kind of transformer, and it has above-mentioned amorphous alloy distribution transformer inner core.
Compare with existing three-phase oil immersion formula amorphous alloy distribution transformer, beneficial effect of the present invention is:
1. the transformer inner core that provides of the utility model adopts tower structure, mainly adopts connecting frame, and this structure helps assembling, and controls rigging error easily.
2. because after amorphous alloy core is subjected to applied stress, the loss meeting increases about 60%, and noise also increases thereupon, and is stressed for avoiding amorphous alloy core, the iron core of the amorphous alloy transformer that the utility model provides " suspension " is on coil, and coil passes through the pressing plate load-bearing on framework.
3. because pressing plate of the present utility model is that whole strip is pressed on the coil, therefore, firmly supporting coil equably, and making support become firm.
4. because the insulating paper that core insulation adopts in of the present utility model, be to be form diamond checks by epoxy resin to be coated in the electrician and to make with the semi-solid preparation composite flexible material that forms on the insulation composite flexible material surface with modification, compared with prior art, reduced the consumption of insulating paper, thereby reduced the volume and the coil temperature rise of transformer and inner core greatly, thereby reduced manufacturing cost.
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described in detail.
Description of drawings
Fig. 1 looks schematic diagram for the master of amorphous alloy distribution transformer device body assembling of the present utility model;
Fig. 2 is the schematic top plan view of Fig. 1;
Fig. 3 is the schematic side view of Fig. 1; And
Fig. 4 is used for the diamond dotted insulating paper of GS643 for an embodiment of the present utility model the schematic diagram of transformer layer insulation.
Embodiment
Fig. 1 looks schematic diagram for the master of amorphous alloy distribution transformer device body assembling of the present utility model; Fig. 2 is the schematic top plan view of Fig. 1; Fig. 3 is the schematic side view of Fig. 1.Shown in Fig. 1～3, the utility model provides a kind of amorphous alloy distribution transformer inner core, comprising: iron core 1, and it is three-phase five-limb amorphous alloy core; Coil 2 is a square coil, and the lap joint sleeve by opening amorphous alloy core 1 top is on core limb; Framework 3, described unshakable in one's determination 1 and coil 2 be limited in the described framework 3, and, leave the space between the described coil 2 and unshakable in one's determination 1, in this space, be provided with a plurality of insulation boards 4; Also comprise at first pressing plate 51 between the upper surface of described framework 3 and described coil 2, second pressing plate 52 between the lower surface of described framework 3 and described coil 2, the integral body of first pressing plate 51 and second pressing plate 52 all is strip, is pressed in respectively on the upper and lower surface of described three coils 2; The insulating paper 5 that interior core insulation adopts is form diamond checks by the epoxy resin with modification and is coated in the electrician and makes with the semi-solid preparation composite flexible material that forms on the composite flexible material surface of insulating.
In an embodiment of the present utility model, the insulating paper 5 that core insulation adopts in described is to be form diamond checks by the epoxy resin with modification to be coated in the electrician and to make with the semi-solid preparation composite flexible material that forms on the composite flexible material surface of insulating, for example, employing is the diamond dotted insulating paper of " GS643 " by the model that Mianyang Guoshun Electric Co., Ltd. produces, the temperature resistant grade of this insulating paper 5 is the F level, is applicable to the layer insulation and the turn-to-turn insulation of transformer.
Fig. 4 is among the embodiment of the present utility model being used for the diamond dotted insulating paper of GS643 the schematic diagram of transformer layer insulation.As shown in Figure 4, the puncture voltage 〉=60kV/mm of the insulating paper 5 of interior core insulation employing.The general coil interlayer insulating material of transformer industry is the some glue insulating paper of 0.08mm, its puncture voltage requirement 〉=8kV/mm.Pass through simple computation, the puncture voltage that thick diamond dotted insulating paper of GS643 of 0.1mm can bear is 6kV approximately, and the puncture voltage that 0.08mm point glue insulating paper can bear is 0.64kV approximately, and the puncture voltage that can bear of thick diamond dotted insulating paper of GS643 of 0.1mm is 9.375 times of a 0.08mm point glue insulating paper approximately so.In other words, under the demand of same breakdown voltage, we can substitute original about 9 0.08mm point glue insulating paper with 1 thick diamond dotted insulating paper of GS643 of 0.1mm.Therefore, be example with the amorphous alloy distribution transformer of 20kV, can satisfy the performance requirement of transformer fully with 2 thick diamond dotted insulating papers of GS643 of 0.1mm.The gross thickness of the diamond dotted insulating paper of GS643 that 2 0.1mm are thick is 0.2mm, and the gross thickness of 18 0.08mm point glue insulating papers commonly used is 1.44mm.Therefore, when the utility model is used for the layer insulation of transformer and turn-to-turn insulation at the diamond dotted insulating paper of the GS643 that 0.1mm is thick, reduce the volume of transformer greatly, also solved the cost of 20kV amorphous alloy transformer and the problem of coil temperature rise well.
Amorphous alloy transformer coil is a rectangular configuration, stressed not as good as circular coil even, easy deformation when bearing short-circuit electromotive force, by first pressing plate 51, second pressing plate 52 with coil 2 axial compression in upper clamping piece 31, lower clamping piece 32.Preferably, when transformer was installed, two first pressing plates 51 laid respectively at 3 coils and are exposed on the upper surface (surface that coil width shown in Figure 2 is short) of the both sides of iron core 1.Similarly, when transformer is installed, two second pressing plates 52 lay respectively at 3 coils be exposed to unshakable in one's determination 1 both sides lower surface below.Low-voltage coil is the Copper Foil coiling, the axial electric power that produces when being enough to bear quality unshakable in one's determination and short circuit.
In assembling process, at long axis direction (length direction of coil shown in Figure 2) cushioning lip block 53, so that coil is compressed.
Shown in Fig. 1～3, framework 3 comprises upper clamping piece 31, lower clamping piece 32 and side folder 33, and upper clamping piece 31, lower clamping piece 32 and side folder 33 are fixed tightly in together by securing member, thereby form general frame.In this embodiment, tighten up mutually by 8 screw rods 34 between the upper clamping piece 31 of framework 3 and the lower clamping piece 32.The transformer adopting tower structure mainly adopts connecting frame, helps controlling rigging error and suspension unshakable in one's determination.
Transformer noise is mainly derived from magnetostriction unshakable in one's determination.The magnetostriction degree of non-crystaline amorphous metal is high more about 10% than silicon steel sheet, so the noise ratio of Amorphous Alloy Core Transformer is with capacity silicon steel plate core transformer height.Amorphous alloy transformer coil is a rectangular configuration, should avoid low pressure square coil major axis and minor axis difference excessive during designing and calculating, and long usually and wide ratio is 1.2: 1, and in this embodiment, the length and width ratio of coil 2 is 1.4～1.6: 1.Preferably, the length and width ratio of coil 2 is 1.55: 1.
Particularly, the primary side voltage of amorphous alloy distribution transformer inner core coil 2 of the present utility model is 20kV.Certainly, primary side voltage also can be other numerical value, when the primary side voltage of coil 2 not simultaneously, the parameter of the high pressure of unshakable in one's determination 1, coil 2, low-voltage coil etc. should correspondingly be adjusted.
The utility model also provides a kind of transformer, and it has above-mentioned amorphous alloy distribution transformer inner core.Certainly the parts that also comprise other, as casing etc., but because these are same as the prior art, therefore, in this no longer repeat specification.
In sum, three-phase amorphous alloy distribution transformer of the present utility model and inner core intensity height thereof, easily manufactured, assembling easily, make support between coil and the folder from top to bottom firm, stressed evenly, and the volume of total is little, cost is low and coil temperature rise is low.
It should be noted that at last: above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to above-mentioned embodiment, those of ordinary skill in the art is to be understood that, still can make amendment and be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. amorphous alloy distribution transformer inner core comprises:
(1) unshakable in one's determination, it is three-phase five-limb amorphous alloy core;
Coil (2) is a square coil, is enclosed within on iron core (1) post;
Framework (3), described iron core (1) and coil (2) are limited in the described framework (3), and, leave the space between described coil (2) and (1) unshakable in one's determination, in this space, be provided with a plurality of insulation boards (4);
It is characterized in that, also comprise first pressing plate (51) between the upper surface that is positioned at described framework (3) and described coil (2), be positioned at second pressing plate (52) between the lower surface of described framework (3) and described coil (2), the integral body of first pressing plate (51) and second pressing plate (52) all is strip, is pressed in respectively on the upper and lower surface of described three coils (2); The insulating paper (5) that core insulation adopts in described is form diamond checks by the epoxy resin with modification and is coated in the electrician and makes with the semi-solid preparation composite flexible material that forms on the composite flexible material surface of insulating.
2. amorphous alloy distribution transformer inner core according to claim 1 is characterized in that, described inner core insulation comprises layer insulation and turn-to-turn insulation.
3. amorphous alloy distribution transformer inner core according to claim 1 is characterized in that, the puncture voltage 〉=60kV/mm of the insulating paper (5) that described interior core insulation adopts.
4. amorphous alloy distribution transformer inner core according to claim 1 is characterized in that, the temperature resistant grade of the insulating paper (5) that described interior core insulation adopts is the F level.
5. amorphous alloy distribution transformer inner core according to claim 1 is characterized in that, also comprises being pressed in the cushion block (53) that three coils (2) are positioned at the inner part of iron core (1).
6. amorphous alloy distribution transformer inner core according to claim 1, it is characterized in that, described framework (3) comprises upper clamping piece (31), lower clamping piece (32) and side folder (33), described upper clamping piece (31), lower clamping piece (32) and side folder (33) are fixed tightly in together by securing member, thereby form general frame (3).
7. according to the arbitrary described amorphous alloy distribution transformer inner core of claim 1-6, it is characterized in that the primary side voltage of described coil (2) is 20kV.
8. amorphous alloy distribution transformer inner core according to claim 1 is characterized in that, the length and width ratio of described coil (2) is 1.4～1.6: 1.
9. amorphous alloy distribution transformer inner core according to claim 8 is characterized in that, the length and width ratio of described coil (2) is preferably 1.55: 1.
10. a transformer is characterized in that, has the arbitrary described amorphous alloy distribution transformer inner core of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201657833U CN201478079U (en) | 2009-07-31 | 2009-07-31 | Amorphous alloy distribution transformer and inner core thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201657833U CN201478079U (en) | 2009-07-31 | 2009-07-31 | Amorphous alloy distribution transformer and inner core thereof |
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| Publication Number | Publication Date |
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| CN201478079U true CN201478079U (en) | 2010-05-19 |
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| CN2009201657833U Expired - Fee Related CN201478079U (en) | 2009-07-31 | 2009-07-31 | Amorphous alloy distribution transformer and inner core thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610376A (en) * | 2012-04-12 | 2012-07-25 | 银川欣安瑞电气有限公司 | Novel high-power high-frequency high-voltage oil-immersed transformer for ozone generator |
| CN106935375A (en) * | 2015-12-29 | 2017-07-07 | 保定保菱变压器有限公司 | A kind of SF6 gas-insulated transformer |
| CN108867152A (en) * | 2018-03-26 | 2018-11-23 | 江苏亚威变压器有限公司 | A kind of transformer insulating paper and preparation method thereof |
| CN109786087A (en) * | 2019-03-28 | 2019-05-21 | 湖南德沃普电气股份有限公司 | Winding coil and transformer based on rib lattice glue composite flexible material |
-
2009
- 2009-07-31 CN CN2009201657833U patent/CN201478079U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610376A (en) * | 2012-04-12 | 2012-07-25 | 银川欣安瑞电气有限公司 | Novel high-power high-frequency high-voltage oil-immersed transformer for ozone generator |
| CN102610376B (en) * | 2012-04-12 | 2015-04-08 | 银川欣安瑞电气有限公司 | Novel high-power high-frequency high-voltage oil-immersed transformer for ozone generator |
| CN106935375A (en) * | 2015-12-29 | 2017-07-07 | 保定保菱变压器有限公司 | A kind of SF6 gas-insulated transformer |
| CN108867152A (en) * | 2018-03-26 | 2018-11-23 | 江苏亚威变压器有限公司 | A kind of transformer insulating paper and preparation method thereof |
| CN109786087A (en) * | 2019-03-28 | 2019-05-21 | 湖南德沃普电气股份有限公司 | Winding coil and transformer based on rib lattice glue composite flexible material |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20150731 |
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| EXPY | Termination of patent right or utility model |