CN201323073Y - Sandwich structure of corona resistant enameled wire - Google Patents
Sandwich structure of corona resistant enameled wire Download PDFInfo
- Publication number
- CN201323073Y CN201323073Y CNU200920096563XU CN200920096563U CN201323073Y CN 201323073 Y CN201323073 Y CN 201323073Y CN U200920096563X U CNU200920096563X U CN U200920096563XU CN 200920096563 U CN200920096563 U CN 200920096563U CN 201323073 Y CN201323073 Y CN 201323073Y
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- Prior art keywords
- corona
- coat
- enameled wire
- enamelled wire
- corona resistant
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Abstract
The utility model provides a sandwich structure of a corona resistant enameled wire. From the inside to outside, the cross section structure of the enameled wire is composed of a copper core, a modified high temperature polyester coat, a corona resistant insullac coat and a polyamide-imide coat. The thicknesses of the corona resistant insullac coat and the modified high temperature polyester coat are respectively 35-45 percent and 50-60 percent of the thickness of the overall coat. The utility model not only has the properties of common enameled wires, but also provides good corona resistance performance. According to relevant experiments, the pulse resistance service life of the corona resistant enameled wire is around 100 times of that of other enameled wires, thereby prolonging the service life of a motor and saving energy. Furthermore, the corona resistant enameled wire can perfectly meet operating requirements of variable frequency motors.
Description
Technical field
The utility model relates to the sandwich of the enamelled wire of anti-corona that a kind of enamelled wire product, particularly alternating-current variable frequency motor use.
Background technology
Along with developing rapidly of variable-frequency control technique, the application of variable-frequency motor more and more widely, alternating-current variable frequency motor especially, electricity was an impulse wave when alternating-current variable frequency motor used, waveform has towering spike, and has precipitous rise time and high frequency.The conventional variety enamelled wire is used on this alternating-current variable frequency motor, a little less than the ability because of anti-high frequency of this enamelled wire and momentary pulse peak voltage, the enamelled wire winding is easy to take place the breakdown between adjacent turns phenomenon, shortened motor useful life, under these circumstances, the enamelled wire of anti-corona thed use of variable-frequency motor is demanded exploitation urgently.
Summary of the invention
The purpose of this utility model is exactly to satisfy the specific (special) requirements of variable-frequency motor, with the useful life of prolongation motor and energy-conservation function.
To achieve these goals, concrete technical scheme of the present utility model provides a kind of sandwich of the enamelled wire of anti-the corona, and wherein: the cross-sectional structure of this enamelled wire from inside to outside is followed successively by high-temperature polyester coating, corona-resistant insulation lacquer coat, the polyamidoimide coating of copper core, modification.
The thickness of corona-resistant insulation lacquer coat accounts for the 35%-45% of total coating layer thickness.
The thickness of the high-temperature polyester coating of modification accounts for the 50%-60% of total coating layer thickness.
Effect of the present utility model is some performances that this structure enamelled wire not only has general enamelled wire, but also has very high anti-corona performance, correlation test proves, the anti-pulse life-span of this enamelled wire is about 100 times of other enamelled wires, played and prolonged the useful life of motor and energy-conservation effect, the instructions for use of variable-frequency motor fully.
Description of drawings
Fig. 1 is the sandwich schematic diagram of the enamelled wire of anti-corona the of the present utility model.
Among the figure:
1, polyamidoimide coating 2, corona-resistant insulation lacquer coat
3, the high-temperature polyester coating of copper core 4, modification
Embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the enamelled wire of anti-corona sandwich of the present utility model.
The enamelled wire of anti-corona the of the present utility model is compared tool with the conventional variety enamelled wire and is very different, it at first is structure in the insulating varnish coating, the coating of general enamelled wire is a 1-2 kind insulating varnish coating, and the enamelled wire of anti-the corona is three kind insulating varnish coatings, it briefly is exactly three-decker, as shown in Figure 1, what play a crucial role is exactly intermediate course corona-resistant insulation lacquer coat 2, this sandwich has been arranged just, make this enamelled wire have the unexistent performance of other enamelled wires---the ability of anti-high frequency and momentary pulse peak voltage, be called for short anti-corona performance.The sandwich of the enamelled wire of anti-corona the, the cross-sectional structure of this enamelled wire from inside to outside are followed successively by high-temperature polyester coating 4, corona-resistant insulation lacquer coat 2, the polyamidoimide coating 1 of copper core 3, modification.
The thickness of corona-resistant insulation lacquer coat 2 is the 35%-45% of total coating layer thickness.
The thickness of the high-temperature polyester coating 4 of modification accounts for the 50%-60% of total coating layer thickness.
As shown in Figure 1, the enamelled wire of anti-corona sandwich of the present utility model is a kind of to be three coating structures, at first being attached on the copper cash being the high-temperature polyester lacquer coat 4 of modification, secondly is that intermediate course is a corona-resistant insulation lacquer coat 2, and outermost is a polyamidoimide lacquer coat 1.Intermediate course corona-resistant insulation lacquer coat 2 is a kind of special insulating varnish, and promptly the inorganic compound of some fine powder shapes has been dosed in the inside, as TiO
2, SiO
2, AL
2O
3Deng, dosing of these inorganic compounds makes insulating coating have multiple special effects, as the effect that insulate, electric field homogenizing effect, screen effect and thermally-stabilised effect, just because of the comprehensive performance of these effects, the enamelled wire that makes this insulating varnish produce has the very strong anti-high-frequency pulse voltage impact and the ability of anti-corona, has satisfied the specific (special) requirements of variable-frequency motor.Intermediate course corona-resistant insulation lacquer coat 2 accounts for about 35% ~ 45% of whole insulating varnish coating, and the concentricity of intermediate course and copper core should be descended below 1.4 in addition, guarantees the homogeneity of the each point corona-resistance property on the sandwich annulus.
Use the enamelled wire of the anti-corona sandwich of this utility model, by the multiple pulses life test, the pulse life-span can reach more than 27 hours even be higher, and the general enamelled wire pulse life-span had only about 30 minutes, have in addition 1 minute less than just breakdown.
Claims (3)
1, a kind of sandwich of the enamelled wire of anti-the corona is characterized in that: the cross-sectional structure of this enamelled wire from inside to outside is followed successively by high-temperature polyester coating (4), corona-resistant insulation lacquer coat (2), the polyamidoimide coating (1) of copper core (3), modification.
2, the sandwich of the enamelled wire of anti-corona the according to claim 1 is characterized in that: the thickness of corona-resistant insulation lacquer coat (2) accounts for the 35%-45% of total coating layer thickness.
3, the sandwich of the enamelled wire of anti-corona the according to claim 1 is characterized in that: the 50%-60% of the total coating layer thickness of thickness of the high-temperature polyester coating (4) of modification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920096563XU CN201323073Y (en) | 2009-04-29 | 2009-04-29 | Sandwich structure of corona resistant enameled wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920096563XU CN201323073Y (en) | 2009-04-29 | 2009-04-29 | Sandwich structure of corona resistant enameled wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201323073Y true CN201323073Y (en) | 2009-10-07 |
Family
ID=41160449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200920096563XU Expired - Lifetime CN201323073Y (en) | 2009-04-29 | 2009-04-29 | Sandwich structure of corona resistant enameled wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201323073Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887661A (en) * | 2019-04-24 | 2019-06-14 | 南通远景电工器材有限公司 | Sandwich structure of corona-resistant enameled wire |
-
2009
- 2009-04-29 CN CNU200920096563XU patent/CN201323073Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887661A (en) * | 2019-04-24 | 2019-06-14 | 南通远景电工器材有限公司 | Sandwich structure of corona-resistant enameled wire |
| CN109887661B (en) * | 2019-04-24 | 2020-09-01 | 南通远景电工器材有限公司 | Sandwich structure of corona-resistant enameled wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |