CN219435562U - Enamelled wire - Google Patents
Enamelled wire Download PDFInfo
- Publication number
- CN219435562U CN219435562U CN202222284601.2U CN202222284601U CN219435562U CN 219435562 U CN219435562 U CN 219435562U CN 202222284601 U CN202222284601 U CN 202222284601U CN 219435562 U CN219435562 U CN 219435562U
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- layer
- primer layer
- paint
- volume ratio
- primer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model discloses an enameled wire which sequentially comprises a conductor, a first primer layer, a middle primer layer and a top primer layer from inside to outside in the radial direction, wherein the volume ratio of the first primer layer is 5% -15%, the volume ratio of the second primer layer is 25% -35%, the middle primer layer or the top primer layer is a corona-resistant layer, and the volume ratio of the middle primer layer or the top primer layer is 35% -65%. According to the utility model, the first primer layer, the second primer layer, the middle paint layer and the top paint layer are arranged, wherein the corona-resistant layer is the middle paint layer or the top paint layer, and the reliability of the insulation system is improved by reasonably configuring the volume ratio among the layers and the loss caused by partial discharge.
Description
Technical Field
The utility model relates to the field of new energy electric vehicles, in particular to an enameled wire.
Background
In the new energy high voltage driving motor of 650V and above, the partial discharge phenomenon between winding coils is a main cause of insulation failure. An air gap layer is inevitably present in the contact region of adjacent coils, and partial discharge occurs if the applied field strength applied to both ends of the air gap (i.e., the overlapping region of adjacent winding coils) reaches an air breakdown field strength (3 Kv/mm) at this time. The insulation system of the motor can be continuously corroded by continuous impact of heat aging, electrons and ions generated by partial discharge, and in the long-time use process, erosion holes can be formed in an insulation material manufacturer, so that the insulation system of the motor is invalid, in addition, the physical properties of coil materials can be changed, and the normal operation of the motor and the safety of the whole vehicle are endangered.
At present, an enameled wire with an anti-corona coating is tried to be used as a winding coil in the industry, and the enameled wire with the structure can well inhibit loss caused by partial discharge, so that the reliability of an insulation system is improved, and the technical problem to be solved in the field is solved.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the enameled wire which can effectively inhibit partial discharge, thereby improving the reliability of an insulation system.
In order to solve the technical problems, the enameled wire provided by the utility model comprises
A conductor;
a first primer layer coated on the surface of the conductor, wherein the volume ratio of the first primer layer is 5-15%;
a second primer layer coated on the outer surface of the first primer layer, the second primer layer having a volume ratio of 25% -35%;
a middle paint layer coated on the outer surface of the second primer layer;
the finish paint layer is coated on the outer surface of the middle paint layer;
the middle paint layer or the top paint layer is a corona-resistant layer, and the volume ratio of the corona-resistant layer is 35% -65%.
Preferably, the middle paint layer is a corona resistant layer, which adopts polyamide imide or polyimide as paint and contains inorganic nano particles;
the finish paint layer adopts polyamide imide as a paint, and the volume ratio of the polyamide imide is 5-15%.
Preferably, the particle size of the nanoparticle is in the range of 5-100nm;
preferably, the material of the nano particles is SiO 2 、Al 2 O 3 Or AlN.
Preferably, the finishing paint layer is a corona-resistant layer, which adopts polyamide imide or polyimide as paint and contains inorganic nano particles;
the middle paint layer adopts polyamide imide as paint, and the volume ratio of the polyamide imide is 5% -15%.
Preferably, the particle size of the nanoparticle is in the range of 5-100nm;
preferably, the material of the nano particles is SiO 2 、Al 2 O 3 Or AlN.
Preferably, the first primer layer is polyamide imide as a coating.
Preferably, polyimide is used as the second primer layer.
Preferably, the conductor is copper.
According to the utility model, the first primer layer, the second primer layer, the middle paint layer and the top paint layer are arranged, wherein the corona-resistant layer is the middle paint layer or the top paint layer, and the reliability of the insulation system is improved by reasonably configuring the volume ratio among the layers and the loss caused by partial discharge.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the following brief description of the drawings is given for the purpose of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without the need for inventive work for a person skilled in the art.
Fig. 1 is a schematic structural view of an embodiment of an enamel wire according to the present utility model;
in the figure, 1-conductor; 2-a first primer layer; 3-a second primer layer; 4-a middle paint layer; 5-top coat layer.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, there is shown an enamel wire according to the present utility model, including:
a conductor;
a first primer layer coated on the surface of the conductor, wherein the volume ratio of the first primer layer is 5-15%;
a second primer layer coated on the outer surface of the first primer layer, the second primer layer having a volume ratio of 25% -35%;
a middle paint layer coated on the outer surface of the second primer layer;
the finish paint layer is coated on the outer surface of the middle paint layer;
the middle paint layer or the finish paint layer is a corona-resistant layer, and the volume ratio of the corona-resistant layer is 35% -65%.
In the specific embodiment, the first primer layer is used for improving the adhesive force between the conductor and the paint layer, the paint layer has higher adhesive force, but the heat resistance is poorer, the too thick paint layer can cause the reduction of the heat resistance of the enameled wire, and the too thin paint layer can cause the reduction of the adhesive force of the paint film, so that the first primer layer preferably adopts polyamide imide (PAI) as the paint, and the volume ratio of the first primer layer is 5-15%; the second primer layer is used for improving the physical properties and heat resistance level of the whole paint film, so that the second primer layer preferably adopts Polyimide (PI) as paint, and the volume ratio of the second primer layer is 25% -35%; the middle paint layer or the finish paint layer adopts a paint layer made of corona-resistant materials, so that damage to a paint film caused by partial discharge can be effectively delayed in an application process, the service life of the paint film against the partial discharge is positively related to the thickness of the paint layer, and the thicker the thickness is, the longer the service life of the paint film against the partial discharge is, but the service life of the paint film is greatly reduced under the application environment of high-low temperature alternation due to the fact that inorganic nano particles are compounded, and the paint film is cracked, insulating failure and the like, so that the volume ratio of the paint film is preferably 35-65%; the finish paint layer is used as a protective layer, and has the effects of improving the surface hardness of a paint film, reducing the friction coefficient and preventing the surface of the enameled wire from being damaged in the production process, and has no corona resistance, so that the enameled wire is only protected in the processing process, and the damage caused by partial discharge cannot be effectively resisted in the application process, and is not suitable to be too thick, and the preferable volume ratio is 5-15%.
In a specific embodiment, the middle paint layer is a corona resistant layer, which adopts polyamide imide or polyimide as paint and contains inorganic nano particles; the finish paint layer adopts polyamide imide as a paint, and the volume ratio of the polyamide imide is 5-15%. Preferably, the particle diameter of the nano particles is in the range of 5-100nm, and the material of the nano particles is SiO 2 、Al 2 O 3 Or AlN.
In the specific embodiment, the middle paint layer is a corona-resistant layer, and the loss caused by partial discharge is effectively inhibited by reasonably selecting the material and the particle size range of the nano particles and reasonably setting the volume ratio of the nano particles.
In a specific embodiment, the top coat layer is a corona resistant layer, which uses polyamide imide or polyimide as a coating and contains inorganic nano particles; the middle paint layer adopts polyamide imide as paint, and the volume ratio of the polyamide imide is 5% -15%. Preferably, the particle diameter of the nano particles is in the range of 5-100nm, and the material of the nano particles is SiO 2 、Al 2 O 3 Or AlN.
In a specific embodiment, the conductor is copper.
In summary, according to the utility model, the first primer layer, the second primer layer, the middle paint layer and the top paint layer are arranged, wherein the corona resistant layer is the middle paint layer or the top paint layer, and the reliability of the insulation system is improved by reasonably configuring the volume ratio among the layers and the loss caused by partial discharge.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the scope of the utility model, but rather to cover any modifications, equivalents, improvements or the like within the spirit and scope of the present utility model.
Claims (6)
1. An enameled wire, characterized by comprising:
a conductor;
a first primer layer coated on the surface of the conductor, wherein the volume ratio of the first primer layer is 5-15%;
a second primer layer coated on the outer surface of the first primer layer, the second primer layer having a volume ratio of 25% -35%;
a middle paint layer coated on the outer surface of the second primer layer;
the finish paint layer is coated on the outer surface of the middle paint layer;
the middle paint layer or the top paint layer is a corona-resistant layer, and the volume ratio of the corona-resistant layer is 35% -65%.
2. The wire according to claim 1, wherein the middle paint layer is a corona resistant layer;
the volume ratio of the finish paint layer is 5% -15%.
3. The wire of claim 1 wherein the topcoat layer is a corona resistant layer;
the volume ratio of the middle paint layer is 5% -15%.
4. The wire according to claim 1, wherein the first primer layer is polyamide imide as a coating material.
5. The wire enamel of claim 1 wherein the second primer layer is polyimide as a coating.
6. The wire according to any one of claims 1 to 5, wherein the conductor is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284601.2U CN219435562U (en) | 2022-08-30 | 2022-08-30 | Enamelled wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284601.2U CN219435562U (en) | 2022-08-30 | 2022-08-30 | Enamelled wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219435562U true CN219435562U (en) | 2023-07-28 |
Family
ID=87332770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222284601.2U Active CN219435562U (en) | 2022-08-30 | 2022-08-30 | Enamelled wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219435562U (en) |
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2022
- 2022-08-30 CN CN202222284601.2U patent/CN219435562U/en active Active
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