CN203456130U - Copper strap wire for electrical excitation coil - Google Patents
Copper strap wire for electrical excitation coil Download PDFInfo
- Publication number
- CN203456130U CN203456130U CN201320532391.2U CN201320532391U CN203456130U CN 203456130 U CN203456130 U CN 203456130U CN 201320532391 U CN201320532391 U CN 201320532391U CN 203456130 U CN203456130 U CN 203456130U
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- CN
- China
- Prior art keywords
- polyester film
- strap wire
- copper
- copper strap
- wire
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a copper strap wire for an electrical excitation coil, and the copper strap wire comprises a copper-strap wire. The exterior of the copper-strap wire is wrapped by a polyester film with the thickness 0.25mm. The outer layer of the copper-strap wire employs the polyester film as an insulating layer. Because the flexibility of the polyester film is good and the capability of water absorption of the polyester film is poor, thereby enabling the copper-strap wire to maintain good performance of insulation and the performances of temperature resistance and pressure resistance when the copper-strap wire is immersed into water.
Description
Technical field
The utility model relates to insulated copper flat wire, is specifically related to a kind of electric magnet exciting coil copper strap wire.
Background technology
Tradition is for the paper bag winding wire of the following oil-filled transformer of 10KV, is that coiling cable paper (telephone paper) is as insulating barrier on copper strap wire bare conductor, and because the moisture absorption of paper is strong, when the little magnet exciting coil of making diameter, external insulation layer easily ftractures; Its insulation average thickness is greater than 0.45mm, and power frequency dielectric strength is not less than 3.6KV, and heatproof is 105 ℃.Traditional copper strap wire has shortcomings: insulating barrier average thickness is large, and the manufactured size of transformer is increased, and has increased cost; The insulating barrier of copper strap wire is only cable paper, and insulation effect is poor, and aging fast after long-term use, damage easy to crack; Due to the characteristic of insulating paper, make its pressure high-temp resistant poor-performing simultaneously.
In order to solve above-mentioned deficiency of the prior art, the utility model proposes a kind of new solution.
Utility model content
The purpose of this utility model is to provide that a kind of pliability is strong, the electric magnet exciting coil copper strap wire of heat resisting and pressure resisting better performances.
For reaching above-mentioned purpose, the technical scheme that the utility model adopts is: a kind of electric magnet exciting coil copper strap wire is provided, comprises copper strap wire, the outer wrap of described copper strap wire has polyester film, and the gross thickness of polyester film is 0.25mm; The rate of putting up of described polyester film is greater than 40%, and pitch is less than 20mm.
Preferably, described polyester film is double-layer polyester film.
In sum, the utlity model has following advantage:
Adopted double-layer polyester film as insulating barrier, polyester film pliability is good, and water absorption is poor, while making copper strap wire be immersed in oil, can keep good insulation property, the thickness of its insulating barrier has reduced 44%, makes its temperature resistant grade more than 130 degrees Celsius simultaneously, and its withstand voltage properties strengthens more than 10 times.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is that single-layer polyester film winding is at the schematic diagram of copper strap wire.
Wherein, 1, copper strap wire; 2, nexine polyester film; 3, outer polyester film.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
As shown in Figure 1, copper strap wire 1, in manufacturing process, is wrapped in polyester film on copper strap wire 1.The wrapped number of plies of polyester film can be selected according to actual conditions, allows while needing wrapped thicker insulating barrier, can wrapped more multi-layered polyester film; But the wrapped number of plies of polyester film is too much, will make thickness increase, the volume of copper strap wire 1 is increased, this will affect its application.
In order to make insulation effect better, and thickness is moderate, general wrapped two layers polyester film.First nexine polyester film 2 is wrapped on copper strap wire 1 with angle according to a certain direction, then outer polyester film 3 is wound on to the skin of nexine polyester film 2 with the direction with nexine polyester film 2 coiling opposite directions.As shown in Figure 2, term of the present utility model is carried out to relevant explanation, a in Fig. 2 represents to put up width, and b represents pitch, and c represents the width of polyester film, and the rate of putting up is to put up the ratio of width and polyester film width.Put up width relevant to angle and density degree that polyester film is wrapped in copper strap wire 1, refer to part overlapping in polyester film winding process.At the width of polyester film, fixedly time, put up width larger, the coiling of every strata ester film is more intensive.If the rate of putting up is too low, due to the heat-shrinkable feature of polyester film, finished product, when doing crooked experiment, easily occurs that alice reveals seam phenomenon; When wrapped coil, will affect the insulation property of product simultaneously.
In order to make product have good performance, the rate of putting up while making every strata ester film be wound on copper strap wire 1 is all greater than 40%, and pitch is less than 20mm.If during double-layer polyester film, when coiling nexine polyester film 2 and outer polyester film 3, all make its rate of putting up all be greater than 40%, pitch is less than 20mm; In order to control the thickness of insulating barrier, the thickness sum that makes nexine polyester film 2 and outer polyester film 3 is 0.25mm.
Although by reference to the accompanying drawings embodiment of the present utility model is described in detail, should not be construed as the restriction to the protection range of this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection range of this patent.
Claims (2)
1. an electric magnet exciting coil copper strap wire, is characterized in that: comprise copper strap wire, the outer wrap of described copper strap wire has polyester film, and the gross thickness of polyester film is 0.25mm; The rate of putting up of described polyester film is greater than 40%, and pitch is less than 20mm.
2. electric magnet exciting coil copper strap wire as claimed in claim 1, is characterized in that: described polyester film is double-layer polyester film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532391.2U CN203456130U (en) | 2013-08-29 | 2013-08-29 | Copper strap wire for electrical excitation coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532391.2U CN203456130U (en) | 2013-08-29 | 2013-08-29 | Copper strap wire for electrical excitation coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203456130U true CN203456130U (en) | 2014-02-26 |
Family
ID=50135990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532391.2U Expired - Fee Related CN203456130U (en) | 2013-08-29 | 2013-08-29 | Copper strap wire for electrical excitation coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203456130U (en) |
-
2013
- 2013-08-29 CN CN201320532391.2U patent/CN203456130U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140226 Termination date: 20190829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |