CN103346003A - Novel dry type electric transformer low-voltage coil structure - Google Patents
Novel dry type electric transformer low-voltage coil structure Download PDFInfo
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- CN103346003A CN103346003A CN2013102988374A CN201310298837A CN103346003A CN 103346003 A CN103346003 A CN 103346003A CN 2013102988374 A CN2013102988374 A CN 2013102988374A CN 201310298837 A CN201310298837 A CN 201310298837A CN 103346003 A CN103346003 A CN 103346003A
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Abstract
The invention relates to a novel dry type electric transformer low-voltage coil structure which comprises a coil. The head wire and the tail wire of the coil are respectively led out from the two ends of the coil. A coil winding is of an S-shaped multi-section layer-type structure. A small airway is used in a coil axis. An inner insulation layer is arranged on the inner surface of the coil winding, and an outer insulation layer is arranged on the outer surface of the coil winding. The upper end and the lower end of each of the inner insulation layer and the outer insulation layer are both higher than the winding. Insulation resin is poured between the inner insulation layer and the outer insulation layer. The head out wire and the tail out wire of the dry type electric transformer low-voltage coil are led out from the two ends of the coil, the multi-section layer-type structure is used in the coil, electric field intensity between layers and sections is greatly lowered, so that the performance such as partial discharge of a transformer is easy to control, a technology winding method is simple, the small airway is used in the coil axis, and accordingly the appearance of the whole coil is shrunk, and accordingly the whole appearance size of the transformer is lowered, and cost of the transformer is greatly lowered.
Description
Technical field
The present invention relates to a kind of dry-type power transformer low-voltage coil new construction.
Background technology
10 ~ 35KV level non-excitation pressure adjustment dry-type power transformer is that high pressure is 10 ~ 35KV electric pressure, and low pressure is the transformer of 3 ~ 10KV electric pressure; Because low-voltage coil is interior loop, the electric pressure height is so low-pressure structure and profile have bigger influence to performance and the cost of whole transformer when product design.In product design in the past because low-voltage coil electric pressure height, electric current are little, so adopt double-deck usually or four layer lines around structure; But this structure can cause voltage between layers higher, and interlayer must adopt between big airways or thick-layer and insulate.
Dry-type power transformer low pressure 10KV loop construction as shown in Figure 1 in the past, winding head, tail outlet a(b, c), x(y, z) at same end, interlayer must adopt big airways 3 could satisfy the electric property of coil, but certainly will increase the overall dimension of transformer monnolithic case, particularly iron core so greatly, cause the transformer cost to improve greatly.
Summary of the invention
The present invention is directed to the problem that above-mentioned prior art exists and make improvement, namely technical problem to be solved by this invention provides a kind of interlayer, intersegmental electric field strength is low and overall dimension is little dry-type power transformer low-voltage coil new construction.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of dry-type power transformer low-voltage coil new construction, comprise coil, a line and the buttock line of described coil are drawn from the two ends of coil respectively, described coil windings adopts S shape multistage layered structure, and described coil axis adopts little air flue.
Further, the inner surface of described coil windings is provided with inner insulating layer, and outer surface is provided with external insulation layer, and the two ends up and down of described inner insulating layer and external insulation layer all are higher than winding, are cast with insulating resin between described inner insulating layer and the external insulation layer.
Further, described coil height is 1050mm, and the described coil width of cloth is 45mm to thickness.
Further, the upper-end inner diameter of described little air flue is 15mm, and bottom diameter is 14cm.
Compared with prior art, the present invention has following beneficial effect: the head of this dry-type power transformer low-voltage coil, tail outlet are not drawn from the upper and lower end of coil, coil inside has adopted the multistage layered structure, interlayer and intersegmental electric field strength reduce greatly, make the office of transformer performance such as put and be easy to control, the technology winding method is easy; Coil axis has adopted little air flue, has therefore dwindled the profile of whole winding, and then reduces the monnolithic case size of transformer, makes the cost of transformer that bigger decline be arranged.
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of dry-type power transformer low pressure 10KV coil in the past.
Fig. 2 is the structural representation of dry-type power transformer low pressure 10KV coil of the present invention.
Among the figure: a-line, the x-buttock line, 1-first seals, and 2-second seals, 3-big airways, the little air flue of 4-, 5-inner insulating layer, 6-external insulation layer.
Embodiment
As shown in Figure 2, a kind of dry-type power transformer low-voltage coil new construction, comprise coil, a line a(b of described coil c) with buttock line x(y, z) draws from the two ends of coil respectively, described coil windings adopts S shape multistage layered structure, reduce greatly between winding layers and intersegmental electric field strength, performance is easy to control to make that the office of transformer puts etc., and the technology winding method is easy; Described coil axis adopts little air flue, has dwindled the profile of whole winding, and then reduces the monnolithic case size of transformer, makes the cost of transformer that bigger decline be arranged.
In the present embodiment, the inner surface of described coil windings is provided with inner insulating layer 5, and outer surface is provided with external insulation layer 6, and the two ends up and down of described inner insulating layer 5 and external insulation layer 6 all are higher than winding, be cast with insulating resin between described inner insulating layer 5 and the external insulation layer 6, for example epoxy resin etc.
In the present embodiment, the height H of dry-type power transformer low pressure 10KV coil of the present invention is 1050mm, and the described coil width of cloth is 45mm to thickness D; The upper-end inner diameter d1 of described little air flue is 15mm, and bottom diameter d2 is 14cm.And the height H of the low pressure of the dry-type power transformer in the past 10KV coil among Fig. 1 is 1100mm, and the coil width of cloth is 56.5mm to thickness D, and the upper-end inner diameter d1 of big airways is 35mm, and bottom diameter d2 is 34mm.Obviously, whole winding profile of the present invention is littler than existing ad eundem coil, and then reduces the monnolithic case size of transformer, is conducive to reduce the cost of transformer.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (4)
1. a dry-type power transformer low-voltage coil new construction comprises coil, it is characterized in that: a line and the buttock line of described coil are drawn from the two ends of coil respectively, and described coil windings adopts S shape multistage layered structure, and described coil axis adopts little air flue.
2. dry-type power transformer low-voltage coil new construction according to claim 1, it is characterized in that: the inner surface of described coil windings is provided with inner insulating layer, outer surface is provided with external insulation layer, the two ends up and down of described inner insulating layer and external insulation layer all are higher than winding, are cast with insulating resin between described inner insulating layer and the external insulation layer.
3. dry-type power transformer low-voltage coil new construction according to claim 1, it is characterized in that: described coil height is 1050mm, the described coil width of cloth is 45mm to thickness.
4. dry-type power transformer low-voltage coil new construction according to claim 3, it is characterized in that: the upper-end inner diameter of described little air flue is 15mm, bottom diameter is 14cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310298837.4A CN103346003B (en) | 2013-07-17 | 2013-07-17 | Dry-type power transformer low pressure 10kV coil new construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310298837.4A CN103346003B (en) | 2013-07-17 | 2013-07-17 | Dry-type power transformer low pressure 10kV coil new construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103346003A true CN103346003A (en) | 2013-10-09 |
| CN103346003B CN103346003B (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310298837.4A Active CN103346003B (en) | 2013-07-17 | 2013-07-17 | Dry-type power transformer low pressure 10kV coil new construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158353A (en) * | 2016-08-25 | 2016-11-23 | 宁波奥克斯高科技有限公司 | A kind of winding method of high-tension coil |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2300175Y (en) * | 1997-04-07 | 1998-12-09 | 云南变压器厂 | Dry power transformer |
| EP2075806A1 (en) * | 2007-12-27 | 2009-07-01 | Elettromeccanica di Marnate S.p.A. | Dry-type resin-insulated transformer with shielded side-by-side primary windings |
| CN101556864A (en) * | 2009-01-23 | 2009-10-14 | 广东海鸿变压器有限公司 | Method for winding resin insulating dry type transformer coil |
| CN201498329U (en) * | 2009-06-19 | 2010-06-02 | 天津天能变压器有限公司 | 35 kV resin-casting dry-type transformer |
| CN202473553U (en) * | 2012-02-29 | 2012-10-03 | 山东威特变压器厂 | Dry type transformer |
| CN202650811U (en) * | 2012-06-11 | 2013-01-02 | 常熟市常源变压器有限公司 | Low-voltage coil for dry type transformer |
-
2013
- 2013-07-17 CN CN201310298837.4A patent/CN103346003B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2300175Y (en) * | 1997-04-07 | 1998-12-09 | 云南变压器厂 | Dry power transformer |
| EP2075806A1 (en) * | 2007-12-27 | 2009-07-01 | Elettromeccanica di Marnate S.p.A. | Dry-type resin-insulated transformer with shielded side-by-side primary windings |
| CN101556864A (en) * | 2009-01-23 | 2009-10-14 | 广东海鸿变压器有限公司 | Method for winding resin insulating dry type transformer coil |
| CN201498329U (en) * | 2009-06-19 | 2010-06-02 | 天津天能变压器有限公司 | 35 kV resin-casting dry-type transformer |
| CN202473553U (en) * | 2012-02-29 | 2012-10-03 | 山东威特变压器厂 | Dry type transformer |
| CN202650811U (en) * | 2012-06-11 | 2013-01-02 | 常熟市常源变压器有限公司 | Low-voltage coil for dry type transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158353A (en) * | 2016-08-25 | 2016-11-23 | 宁波奥克斯高科技有限公司 | A kind of winding method of high-tension coil |
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| CN103346003B (en) | 2016-01-06 |
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Address after: 100030 Beijing Xicheng District West Chang'an Avenue 86 Co-patentee after: FUZHOU TIANYU ELECTRIC Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 100761 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: FUZHOU TIANYU ELECTRIC Co.,Ltd. Patentee before: State Grid Corporation of China |
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Effective date of registration: 20181220 Address after: 350108 304-A115, 3rd floor, Pioneer Building, 8th East Science and Technology Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fuzhou Xuji Electric Co.,Ltd. Address before: 100030 Beijing Xicheng District West Chang'an Avenue 86 Co-patentee before: FUZHOU TIANYU ELECTRIC Co.,Ltd. Patentee before: State Grid Corporation of China |