CN210200341U - High corona-resistant enameled round copper wire - Google Patents
High corona-resistant enameled round copper wire Download PDFInfo
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- CN210200341U CN210200341U CN201921535647.9U CN201921535647U CN210200341U CN 210200341 U CN210200341 U CN 210200341U CN 201921535647 U CN201921535647 U CN 201921535647U CN 210200341 U CN210200341 U CN 210200341U
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Abstract
The utility model discloses a high corona-resistant enameled round copper wire, which comprises a copper wire core (1), wherein a corona-resistant layer (2) is arranged outside the copper wire core (1), a plurality of first openings (3) are uniformly distributed on the surface of the corona-resistant layer (2), a self-adhesive layer (4) is arranged outside the corona-resistant layer (2), a plurality of second openings (5) matched with the first openings (3) are distributed on the surface of the self-adhesive layer (4), and a high-temperature-resistant layer (6) and a thermosetting layer (7) are sequentially arranged outside the self-adhesive layer (4); the corona resistant layer (2) is an organic silicon resin layer, the high temperature resistant layer (6) is a polyimide layer, and the thermosetting layer (7) is a thermosetting phenolic resin layer. The utility model has the characteristics of the ageing resistance is effectual, long service life.
Description
Technical Field
The utility model relates to an enameled wire, especially a high corona-resistant type enameled copper round wire.
Background
The enameled wire used for the variable frequency motor can be subjected to pulse voltage with short duration and high repetition frequency in the working process, so that the corona aging of the insulating paint layer on the surface of the enameled wire is caused. The reason for causing the insulation damage of the enamel layer is mainly superimposed and promoted by electrical aging and thermal aging, wherein the electrical aging is that when the enameled wires are contacted with each other under the condition of high-frequency pulse voltage, serious partial discharge, namely corona phenomenon, can occur on the air bearing between the enameled wires, so that the insulation aging of the enameled wires is accelerated; the thermal aging is that the space size of the enameled wire in an electrical insulation system is gradually reduced along with the increase of the temperature, so that the partial discharge initial voltage is reduced, and the electrical aging rate is accelerated.
In order to solve the problem, manufacturers generally select wire enamel with high heat resistance or breakdown resistance as an insulating layer on the surface of the enameled wire, but the wire enamel layer can only unilaterally deal with damage caused by electrical aging or thermal aging, so that the anti-aging effect of the wire enamel layer cannot meet the requirement. Therefore, the problem that the anti-aging effect is poor and the service life is short exists in the existing enameled wire for the variable frequency motor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high corona resistant type enameled copper round wire. It has the characteristics of good anti-aging effect and long service life.
The technical scheme of the utility model: a high corona-resistant enameled round copper wire comprises a copper wire core, wherein a corona-resistant layer is arranged on the outer side of the copper wire core, a plurality of first notches are uniformly distributed on the surface of the corona-resistant layer, a self-adhesive layer is arranged on the outer side of the corona-resistant layer, a plurality of second notches matched with the first notches are distributed on the surface of the self-adhesive layer, and a high-temperature-resistant layer and a hot-curing layer are sequentially arranged on the outer side of the self-adhesive layer; the corona resistant layer is an organic silicon resin layer, the high temperature resistant layer is a polyimide layer, and the thermosetting layer is a thermosetting phenolic resin layer.
In the high corona-resistant enameled round copper wire, the cross-sectional shapes of the first notch and the second notch are both arc-shaped, and the ratio of the depth of the first notch to the thickness of the corona-resistant layer is 1: 5 to 6.
In the foregoing high corona-resistant enameled round copper wire, the self-adhesive layer is a hot-melt self-adhesive paint layer, and the thickness ratio of the self-adhesive layer to the corona-resistant layer is 1: 3 to 4.
In the above-mentioned high corona-resistant enameled round copper wire, the cross-sectional shape of the high temperature-resistant layer is a perfect circle.
Compared with the prior art, the corona-resistant layer formed by coating the organic silicon resin paint and the high-temperature-resistant layer formed by coating the polyimide paint can respectively improve the corona resistance and the high-temperature resistance of the enameled wire, so that the utility model can effectively relieve the electrical aging and thermal aging phenomena caused by pulse voltage when in use, and improve the aging resistance effect and the service life of the utility model; when the corona-resistant layer and the high-temperature-resistant layer are coated, the adhesion performance of the high-temperature-resistant layer can be effectively improved through the matching of the self-adhesive layer formed by coating the hot-melt self-adhesive paint, the first opening and the second opening, so that the corona-resistant layer and the high-temperature-resistant layer on the surface of the enameled wire still have good stability after being compounded, and the structural strength and the working stability of the utility model are ensured; through the thermosetting phenolic resin layer on enameled wire surface, can make the lacquer coat surface solidify completely at the working process to further promoted corona resistant layer and high temperature resistant layer's adhesion stability when improving its corona resistant effect and insulating effect, made the utility model discloses can not appear peeling off or the problem of fracture after long-term the use. Therefore, the invention has the characteristics of good anti-aging effect and long service life.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figures are: 1-copper wire core, 2-corona resistant layer, 3-first opening, 4-self-adhesive layer, 5-second opening, 6-high temperature resistant layer and 7-thermal curing layer.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. A high corona-resistant enameled round copper wire is shown in figure 1 and comprises a copper wire core 1, wherein a corona-resistant layer 2 is arranged on the outer side of the copper wire core 1, a plurality of first notches 3 are uniformly distributed on the surface of the corona-resistant layer 2, a self-adhesive layer 4 is arranged on the outer side of the corona-resistant layer 2, a plurality of second notches 5 matched with the first notches 3 are distributed on the surface of the self-adhesive layer 4, and a high-temperature-resistant layer 6 and a thermosetting layer 7 are sequentially arranged on the outer side of the self-adhesive layer 4; the corona resistant layer 2 is an organic silicon resin layer, the high temperature resistant layer 6 is a polyimide layer, and the thermosetting layer 7 is a thermosetting phenolic resin layer.
The cross-sectional shapes of the first notch 3 and the second notch 5 are both arc-shaped, the ratio of the depth of the first notch 3 to the thickness of the corona-resistant layer 2 (the thickness is the thickness of the corona-resistant layer at the notch) is 1: 5 to 6.
The self-adhesive layer 4 is a hot-melt self-adhesive paint layer, and the thickness ratio of the self-adhesive layer 4 to the corona-resistant layer 2 is 1: 3 to 4.
The shape of the outer circle of the section of the high-temperature resistant layer 6 is a perfect circle.
The utility model discloses a theory of operation: when the utility model is used, the corona resistant layer 2 and the high temperature resistant layer 6 on the surface of the copper wire core 1 can respectively have good breakdown resistant and high temperature resistant effects, thereby alleviating the electric aging and thermal aging phenomena caused by the impulse voltage after impact; through the self-adhesive layer 4 between corona resistant layer 2 and the high temperature resistant layer 6, then can make corona resistant layer 2 and high temperature resistant layer 6 adhere firmly each other to avoid appearing the problem that the film peeled off or ftracture because of the increase of enameled wire surface paint layer, improved the utility model discloses job stabilization nature. The adhesion area between the self-adhesive layer 4 and the paint layers on the two sides can be effectively increased through the matching of the first notch 3 and the second notch 5, so that the adhesion strength is increased; when a user processes the corona-resistant layer 2, the arc-shaped first notch 3 is formed in the surface of the corona-resistant layer by extrusion, and the cross section of the high-temperature-resistant layer 6 can be made to be a regular circle by rounding after coating. The paint layer on the surface of the enameled wire can be heated and solidified during work through the thermal curing layer 7, so that the anti-breakdown effect of the paint film is improved, the inner corona-resistant layer 2 and the inner high-temperature-resistant layer 6 are stabilized, and the hidden danger of paint film peeling is further reduced.
Claims (4)
1. The utility model provides a high corona resistant type enameled round copper wire which characterized in that: the corona-resistant cable comprises a copper wire core (1), wherein a corona-resistant layer (2) is arranged on the outer side of the copper wire core (1), a plurality of first notches (3) are uniformly distributed on the surface of the corona-resistant layer (2), a self-adhesive layer (4) is arranged on the outer side of the corona-resistant layer (2), a plurality of second notches (5) matched with the first notches (3) are distributed on the surface of the self-adhesive layer (4), and a high-temperature-resistant layer (6) and a thermosetting layer (7) are sequentially arranged on the outer side of the self-adhesive layer (4); the corona resistant layer (2) is an organic silicon resin layer, the high temperature resistant layer (6) is a polyimide layer, and the thermosetting layer (7) is a thermosetting phenolic resin layer.
2. The high corona resistance type enameled round copper wire as claimed in claim 1, wherein: the cross-sectional shapes of the first notch (3) and the second notch (5) are both arc-shaped, the ratio of the depth of the first notch (3) to the thickness of the corona-resistant layer (2) is 1: 5 to 6.
3. The high corona resistance type enameled round copper wire as claimed in claim 1, wherein: the self-adhesive layer (4) is a hot-melt self-adhesive paint layer, and the thickness ratio of the self-adhesive layer (4) to the corona-resistant layer (2) is 1: 3 to 4.
4. The high corona resistance type enameled round copper wire as claimed in claim 1, wherein: the cross section of the high temperature resistant layer (6) is in a perfect circle shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921535647.9U CN210200341U (en) | 2019-09-16 | 2019-09-16 | High corona-resistant enameled round copper wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921535647.9U CN210200341U (en) | 2019-09-16 | 2019-09-16 | High corona-resistant enameled round copper wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210200341U true CN210200341U (en) | 2020-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921535647.9U Active CN210200341U (en) | 2019-09-16 | 2019-09-16 | High corona-resistant enameled round copper wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210200341U (en) |
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2019
- 2019-09-16 CN CN201921535647.9U patent/CN210200341U/en active Active
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| CP03 | Change of name, title or address |
Address after: 313000 no.897 Xin'an Road, high tech Zone, Wuxing District, Huzhou City, Zhejiang Province Patentee after: Zhejiang Great Wall Electric New Material Technology Co., Ltd Address before: 313000 no.18-61, industrial road, Nanhu high tech Industrial Park, Wuxing District, Huzhou City, Zhejiang Province Patentee before: Huzhou Great Wall Electrical New Material Technology Co., Ltd |