CN112768206A - Epoxy-cast dry-type transformer winding capable of improving anti-cracking capacity - Google Patents
Epoxy-cast dry-type transformer winding capable of improving anti-cracking capacity Download PDFInfo
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- CN112768206A CN112768206A CN202011573301.5A CN202011573301A CN112768206A CN 112768206 A CN112768206 A CN 112768206A CN 202011573301 A CN202011573301 A CN 202011573301A CN 112768206 A CN112768206 A CN 112768206A
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- epoxy
- transformer winding
- elastic insulating
- insulating layer
- cast dry
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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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
- H01F27/28—Coils; Windings; Conductive connections
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention discloses an epoxy cast dry type transformer winding capable of improving cracking resistance, which comprises a plurality of layers of coils which are sequentially arranged from inside to outside, wherein grids are sequentially arranged between two adjacent layers of coils, and epoxy resin is cast in gaps and the periphery of the coils; the advantage is when the temperature of winding risees, and the copper line is heated the inflation and is extrudeed first elastic insulation layer, and first elastic insulation layer provides the space for the inflation of copper line promptly to alleviate and avoid the extrusion to epoxy pouring layer even, improved the anti fracture ability of winding.
Description
Technical Field
The invention relates to a dry-type transformer, in particular to an epoxy cast dry-type transformer winding capable of improving cracking resistance.
Background
The dry-type transformer is widely used in places such as local illumination, high-rise buildings, airports, wharf CNC mechanical equipment and the like, and mainly comprises an iron core and a winding. At present, after copper wires are wound, windings on a dry type transformer are generally cast by epoxy resin or other resin to be used as main insulation, and the dry type transformer is simple in structure. However, because the temperature deformation coefficients of the copper wire and the epoxy resin are different, when the dry-type transformer works, the expansion amount of the copper wire is larger than that of the epoxy resin due to the rise of the winding temperature, so that the epoxy resin on the surface of the coil is extruded and cracked, and the discharge phenomenon or the partial discharge amount on the surface of the coil exceeds the standard.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an epoxy cast dry type transformer winding which can provide space for the expansion of a copper wire so as to improve the anti-cracking capability.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an improve epoxy casting dry-type transformer winding of anti fracture ability, includes the multilayer coil that sets gradually from inside to outside, has set gradually the net between the adjacent two-layer coil, and coil clearance and periphery are poured and are had epoxy, are provided with first elastic insulation layer between the at least two-layer adjacent coil.
Further, a first elastic insulating layer is sequentially arranged between all adjacent coils.
Further, the first elastic insulation layer is made of silicon rubber.
Furthermore, at least one high-temperature-resistant elastic insulating pad is arranged between turns of the coil.
Furthermore, the thickness of the elastic insulating pad is 0.2-2.7 mm.
Furthermore, the conducting wire of the coil is wrapped by a second elastic insulating layer which is resistant to high temperature.
Furthermore, the thickness of the second elastic insulating layer is 0.12-1.35 mm.
Furthermore, the thickness of the first elastic insulating layer is 0.5-2 mm.
Furthermore, the grid is made of glass fibers, and the thickness of the grid is 0.5-1.2 mm.
Compared with the prior art, the winding has the advantages that the first elastic insulating layer is arranged between at least two adjacent layers of coils, when the temperature of the winding rises, the copper wire is heated to expand to extrude the first elastic insulating layer, namely the first elastic insulating layer provides space for the expansion of the copper wire, so that the extrusion of an epoxy resin pouring layer is reduced or even avoided, and the anti-cracking capability of the winding is improved. And at least one elastic insulating pad is arranged between turns of the coil, so that space is further provided for expansion of the copper wire, and the anti-cracking capability of the winding is better.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a schematic diagram of an internal structure according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of the internal structure of a second embodiment of the present invention;
fig. 4 is a schematic internal structure diagram of a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in the figure, the epoxy cast dry-type transformer winding capable of improving the anti-cracking capacity comprises a plurality of layers of coils 1 which are sequentially arranged from inside to outside, grids 2 are sequentially arranged between every two adjacent layers of coils 1, a first elastic insulating layer 3 is arranged between every two adjacent layers of coils 1, and epoxy resin 4 is cast in gaps and the periphery of the coils 1.
Example two: as shown in the figure, the epoxy cast dry-type transformer winding capable of improving the anti-cracking capacity comprises a plurality of layers of coils 1 which are sequentially arranged from inside to outside, grids 2 are sequentially arranged between every two adjacent layers of coils 1, a first elastic insulating layer 3 is arranged between every two adjacent layers of coils 1, a plurality of high-temperature-resistant elastic insulating pads 5 are arranged between turns of the coils 1, and epoxy resin 4 is cast in gaps and the periphery of the coils 1.
Example three: as shown in the figure, the epoxy cast dry-type transformer winding capable of improving the anti-cracking capacity comprises a plurality of layers of coils 1 which are sequentially arranged from inside to outside, grids 2 are sequentially arranged between every two adjacent layers of coils 1, a first elastic insulating layer 3 is sequentially arranged between every two adjacent layers of coils 1, and a high-temperature-resistant second elastic insulating layer 6 wraps the wire of each coil 1.
In the above embodiment, the material of the first elastic insulating layer 3 may be silicon rubber, and the materials of the elastic insulating pad 5 and the second elastic insulating layer 6 may be silicon rubber, mylar + DM material, mylar + non-woven fabric, or other high temperature resistant elastic insulating materials; the thickness of the first elastic insulating layer 3 can be selected within the range of 0.5-2 mm according to needs, the thickness of the elastic insulating pad 5 can be selected within the range of 0.2-2.7 mm according to needs, the thickness of the second elastic insulating layer 6 can be selected within the range of 0.12-1.35 mm according to needs, the grid 2 is made of glass fiber, and the thickness can be selected within the range of 0.5-1.2 mm according to needs so as to adapt to windings with different specifications.
The scope of the present invention includes, but is not limited to, the above embodiments, and the scope of the present invention is defined by the appended claims, and any substitutions, modifications, and improvements that may occur to those skilled in the art are intended to fall within the scope of the present invention.
Claims (9)
1. The utility model provides an improve epoxy casting dry-type transformer winding of anti fracture ability, includes the multilayer coil that sets gradually from inside to outside, has set gradually the net between the adjacent two-layer coil, and coil clearance and peripheral casting have epoxy, its characterized in that: a first elastic insulating layer is arranged between at least two adjacent layers of coils.
2. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 1 wherein: and a first elastic insulating layer is sequentially arranged between all adjacent coils.
3. An epoxy-cast dry-type transformer winding with improved crack resistance as claimed in claim 1 or 2, wherein: the first elastic insulating layer is made of silicon rubber.
4. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 1 wherein: at least one high-temperature resistant elastic insulating pad is arranged between turns of the coil.
5. An epoxy cast dry transformer winding with improved crack resistance as claimed in claim 4 wherein: the thickness of the elastic insulating pad is 0.2-2.7 mm.
6. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 1 wherein: and the conducting wire of the coil is wrapped by a high-temperature resistant second elastic insulating layer.
7. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 6 wherein: the thickness of the second elastic insulating layer is 0.12-1.35 mm.
8. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 1 wherein: the thickness of the first elastic insulating layer is 0.5-2 mm.
9. An epoxy cast dry transformer winding having improved crack resistance as claimed in claim 1 wherein: the grid is made of glass fibers, and the thickness of the grid is 0.5-1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573301.5A CN112768206B (en) | 2020-12-24 | 2020-12-24 | Epoxy casting dry-type transformer winding capable of improving cracking resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573301.5A CN112768206B (en) | 2020-12-24 | 2020-12-24 | Epoxy casting dry-type transformer winding capable of improving cracking resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112768206A true CN112768206A (en) | 2021-05-07 |
| CN112768206B CN112768206B (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011573301.5A Active CN112768206B (en) | 2020-12-24 | 2020-12-24 | Epoxy casting dry-type transformer winding capable of improving cracking resistance |
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB558943A (en) * | 1942-12-19 | 1944-01-27 | Cole E K Ltd | Improvements in or relating to electric transformers |
| GB1182871A (en) * | 1967-04-11 | 1970-03-04 | Dow Corning | Electrical Induction Apparatus. |
| US4095206A (en) * | 1975-02-10 | 1978-06-13 | Victor Company Of Japan, Limited | Encapsulated transformer assembly |
| JPH06224064A (en) * | 1993-01-25 | 1994-08-12 | Toshiba Corp | Manufacture of electromagnetic induction apparatus winding |
| RU94020067A (en) * | 1994-05-20 | 1996-04-10 | В.А. Хабузов | Transformer and method of its manufacture |
| JPH1092659A (en) * | 1996-09-12 | 1998-04-10 | Fuji Electric Co Ltd | Gas-insulated transformer |
| RU2167461C2 (en) * | 1998-02-24 | 2001-05-20 | Латыпов Фирдус Искандерович | Multilayer field coil and its manufacturing technique |
| CN201570341U (en) * | 2009-11-27 | 2010-09-01 | 中国电力科学研究院 | Saturable reactor for DC converter valve |
| CN202258741U (en) * | 2011-09-28 | 2012-05-30 | 陕西合容电力设备有限公司 | Dry type hollow parallel reactor |
| CN202996550U (en) * | 2012-07-06 | 2013-06-12 | 南宁南特变压器制造有限公司 | Interlayer insulator for windings of epoxy resin cast dry type transformer |
| CN103413660A (en) * | 2013-09-10 | 2013-11-27 | 黄成明 | Dry type transformer and production process of high-voltage coil thereof |
| CN203596259U (en) * | 2013-11-18 | 2014-05-14 | 广西南宝特电气制造有限公司 | Epoxy poured dry-type transformer longitudinal insulation structure |
| CN203826181U (en) * | 2013-10-09 | 2014-09-10 | 薛建仁 | Novel insulated dry type power transformer made from silicone rubber |
| CN204011021U (en) * | 2014-08-20 | 2014-12-10 | 南京智达电气有限公司 | Epoxy casting voltage mutual inductor |
| JP6035378B1 (en) * | 2015-06-11 | 2016-11-30 | 昭和電線デバイステクノロジー株式会社 | Litz wire coil |
| CN209515420U (en) * | 2019-03-28 | 2019-10-18 | 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 |
| CN209729714U (en) * | 2019-05-23 | 2019-12-03 | 重庆源通电器设备制造有限责任公司 | A kind of winding construction reducing partial discharge of dry-type transformer amount |
-
2020
- 2020-12-24 CN CN202011573301.5A patent/CN112768206B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB558943A (en) * | 1942-12-19 | 1944-01-27 | Cole E K Ltd | Improvements in or relating to electric transformers |
| GB1182871A (en) * | 1967-04-11 | 1970-03-04 | Dow Corning | Electrical Induction Apparatus. |
| US4095206A (en) * | 1975-02-10 | 1978-06-13 | Victor Company Of Japan, Limited | Encapsulated transformer assembly |
| JPH06224064A (en) * | 1993-01-25 | 1994-08-12 | Toshiba Corp | Manufacture of electromagnetic induction apparatus winding |
| RU94020067A (en) * | 1994-05-20 | 1996-04-10 | В.А. Хабузов | Transformer and method of its manufacture |
| JPH1092659A (en) * | 1996-09-12 | 1998-04-10 | Fuji Electric Co Ltd | Gas-insulated transformer |
| RU2167461C2 (en) * | 1998-02-24 | 2001-05-20 | Латыпов Фирдус Искандерович | Multilayer field coil and its manufacturing technique |
| CN201570341U (en) * | 2009-11-27 | 2010-09-01 | 中国电力科学研究院 | Saturable reactor for DC converter valve |
| CN202258741U (en) * | 2011-09-28 | 2012-05-30 | 陕西合容电力设备有限公司 | Dry type hollow parallel reactor |
| CN202996550U (en) * | 2012-07-06 | 2013-06-12 | 南宁南特变压器制造有限公司 | Interlayer insulator for windings of epoxy resin cast dry type transformer |
| CN103413660A (en) * | 2013-09-10 | 2013-11-27 | 黄成明 | Dry type transformer and production process of high-voltage coil thereof |
| CN203826181U (en) * | 2013-10-09 | 2014-09-10 | 薛建仁 | Novel insulated dry type power transformer made from silicone rubber |
| CN203596259U (en) * | 2013-11-18 | 2014-05-14 | 广西南宝特电气制造有限公司 | Epoxy poured dry-type transformer longitudinal insulation structure |
| CN204011021U (en) * | 2014-08-20 | 2014-12-10 | 南京智达电气有限公司 | Epoxy casting voltage mutual inductor |
| JP6035378B1 (en) * | 2015-06-11 | 2016-11-30 | 昭和電線デバイステクノロジー株式会社 | Litz wire coil |
| CN209515420U (en) * | 2019-03-28 | 2019-10-18 | 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 |
| CN209729714U (en) * | 2019-05-23 | 2019-12-03 | 重庆源通电器设备制造有限责任公司 | A kind of winding construction reducing partial discharge of dry-type transformer amount |
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| Publication number | Publication date |
|---|---|
| CN112768206B (en) | 2023-05-16 |
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