Corona resistant corrosion resistant magnet wire

Abstract

The utility model provides a kind of corona-resistant corrosion-resistant electromagnetic wire, a kind of corona-resistant corrosion-resistant electromagnetic wire, including wire body, insulating layer, corona-resistant layer and sealing coating, the insulating layer is coated on wire body, the corona-resistant layer is located at the outside of insulating layer, the sealing coating is applied to the outer surface of corona-resistant layer;The metal sheath is equipped between the insulating layer and corona-resistant layer, the metal sheath is coated outside insulating layer, the corona-resistant layer includes the base insulating layer of bottom layer, the corona-resistant coating of middle layer and the adhering layer of outer layer.Corona-resistant layer can inhibit ionization, metal sheath is set outside insulating layer to enhance the corrosion resistance of insulating layer, sealing layer can block corrosive material and wire body contact, enhance the overall corrosion resistance, significantly improve the corona-resistant and corrosion-resistant capacity of electromagnetic wire, so that the application range of electromagnetic wire is wider, service life is longer, operation is more reliable.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic wire technology, and specifically relates to an electromagnetic wire that is resistant to corona and corrosion. Background Technology

[0002] Electromagnetic wire, also known as winding wire, is an insulated conductor used in the conductive windings of electromagnetic equipment such as motors, transformers, and inductors.

[0003] The corona resistance and corrosion resistance of electromagnetic wire (winding wire) directly affect the lifespan and reliability of equipment such as motors and transformers. Corona discharge is an aging phenomenon of the insulation layer caused by air ionization under a high-voltage electric field, commonly seen in variable frequency motors, high-voltage transformers, and other similar applications. Corrosion of electromagnetic wire mainly originates from moisture, acidic and alkaline media, and electrochemical reactions. Most existing electromagnetic wires are enameled wires, but enameled wires have poor corona resistance and are easily broken down, affecting their use. Furthermore, their corrosion resistance is insufficient in harsh environments, impacting the lifespan of the electromagnetic wire.

[0004] Therefore, the above-mentioned problems are technical issues that urgently need to be addressed. Utility Model Content

[0005] Purpose of the utility model: In view of the problems existing in the prior art, this utility model provides an electromagnetic wire that is resistant to corona and corrosion, aiming to solve the above-mentioned technical problems.

[0006] Technical solution: In order to achieve the above objectives, this utility model provides a corona-resistant and corrosion-resistant electromagnetic wire, including a conductor body, an insulation layer, a corona-resistant layer and a sealing coating. The insulation layer covers the conductor body, the corona-resistant layer is disposed on the outside of the insulation layer, and the sealing coating is applied to the outer surface of the corona-resistant layer.

[0007] A metal sheath is provided between the insulation layer and the corona-resistant layer, covering the outside of the insulation layer. The corona-resistant layer includes a bottom base insulation layer, a middle corona-resistant coating layer, and an outer adhesion layer. The corona-resistant layer can suppress ionization, the metal sheath on the outside of the insulation layer enhances the corrosion resistance of the insulation layer, and the sealing layer can prevent corrosive substances from contacting the conductor body, thus enhancing the overall corrosion resistance.

[0008] As a further embodiment of this invention, the outer layer of the insulating layer is covered with a semiconductor shielding layer, which is a silicon carbide coating, and the semiconductor shielding layer is located between the insulating layer and the metal sheath.

[0009] Furthermore, the basic insulating layer is a PI film, the bottom surface of the basic insulating layer is tightly bonded to the metal sheath, the corona-resistant coating is a silicone resin with nanofillers, the adhesion layer is an epoxy resin coating treated with plasma, and the inner layer of the insulating layer is tightly bonded to the adhesion layer.

[0010] Furthermore, the thickness of the corona-resistant coating is 0.05mm~0.06mm, and the nanofiller is nano-alumina or nano-boron nitride.

[0011] Furthermore, the sealing coating comprises an underlying epoxy resin layer, a middle polyurethane layer, and an outer fluorocarbon coating.

[0012] Furthermore, the conductor body is made of copper-chromium alloy, and the surface of the conductor body is plated with nickel.

[0013] Furthermore, the insulating layer is made of cross-linked polyethylene.

[0014] Furthermore, the metal sheath is a thin copper strip or stainless steel strip that has undergone insulation treatment.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0016] 1) This invention provides a corona-resistant and corrosion-resistant electromagnetic wire, comprising an insulation layer, a metal sheath, a corona-resistant layer, and a sealing coating outside the wire body. The insulation layer is made of cross-linked polyethylene material with excellent resistance to moisture and chemical corrosion. The metal sheath enhances corrosion resistance, enabling its use in extremely corrosive environments. Both the corona-resistant layer and the sealing coating are composed of three layers. The corona-resistant coating is a silicone resin with nanofiller that disperses the electric field and suppresses partial discharge. The sealing coating forms a dense protective layer to prevent corrosion. 2) This invention utilizes a semiconductor shielding layer, including an insulation layer, to uniformly distribute the surface electric field, reduce partial discharge, and further enhance corona resistance. Simultaneously, the wire body is made of copper-chromium alloy and nickel-plated on the surface, possessing excellent corrosion resistance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a corona-resistant and corrosion-resistant electromagnetic wire according to the present invention;

[0018] Figure 2 This is a schematic diagram of the corona-resistant layer described in this utility model;

[0019] Figure 3 This is a schematic diagram of the sealing layer described in this utility model.

[0020] In the diagram: 1-Conductor body, 2-Insulation layer, 3-Metal sheath, 4-Corona-resistant layer, 41-Basic insulation layer, 42-Corona-resistant layer, 43-Adhesion layer, 5-Sealing coating, 51-Epoxy resin layer, 52-Polyurethane layer, 53-Fluorocarbon coating. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] like Figure 1-2 As shown: A corona-resistant and corrosion-resistant electromagnetic wire includes a conductor body 1, an insulation layer 2, a corona-resistant layer 4, and a sealing coating 5. The insulation layer 2 covers the conductor body 1, the corona-resistant layer 4 is disposed on the outside of the insulation layer 2, and the sealing coating 5 is applied to the outer surface of the corona-resistant layer 4.

[0023] A metal sheath 3 is provided between the insulating layer 2 and the corona-resistant layer 4, and the metal sheath 3 covers the outside of the insulating layer 2. The corona-resistant layer 4 includes a bottom base insulating layer 41, a middle corona-resistant coating layer 42, and an outer adhesion layer 43. The corona-resistant layer 4 has a multi-layer structure. The bottom base insulating layer 41 enhances the insulation performance, the middle corona-resistant coating layer 42 provides corona resistance, and the outer adhesion layer 43 has stronger adhesion to the sealing coating layer 5.

[0024] In addition, the outer layer of the insulating layer 2 is covered with a semiconductor shielding layer, which is a silicon carbide coating, and is located between the insulating layer 2 and the metal sheath 3. The silicon carbide coating, as a semiconductor shielding layer, can uniformly distribute the surface electric field, reduce partial discharge, and further improve corona resistance.

[0025] The basic insulating layer 41 is a PI film, and its bottom surface is tightly bonded to the metal sheath 3. The corona-resistant coating 42 is a silicone resin with nanofillers, and the adhesion layer 43 is an epoxy resin coating that has undergone plasma treatment. The inner layer of the insulating layer 2 is tightly bonded to the adhesion layer 43. The PI film is a high dielectric strength material, which has excellent dielectric properties in electronic devices, enabling it to quickly absorb and release charges, reducing delays and losses during signal transmission. Adding nanofillers to the silicone resin can disperse the electric field and suppress partial discharge; similarly, adding nanofillers to the epoxy resin can be used as an alternative. After plasma treatment, the adhesion layer 43 has stronger adhesion to the sealing layer 5, enhancing the connection between the two.

[0026] Specifically, the thickness of the corona-resistant coating 42 is 0.05mm~0.06mm, and the nanofiller is nano-alumina or nano-boron nitride.

[0027] like Figure 3 As shown, the sealing coating 5 includes a bottom epoxy resin layer 51, a middle polyurethane layer 52, and an outer fluorocarbon coating 53. The bottom epoxy resin layer 51 has extremely strong adhesion to the adhesion layer 42, and the polyurethane layer 52 can prevent moisture from entering the interior of the conductor body 1 to avoid corrosion. Since epoxy resin has poor UV resistance, its service life in outdoor environments is relatively short, while the outer fluorocarbon coating 53 has excellent UV resistance and chemical inertness, thus compensating for this deficiency.

[0028] Specifically, the conductor body 1 is made of copper-chromium alloy, and its surface is plated with nickel. The copper-chromium alloy construction of the conductor body 1 enhances its resistance to environmental corrosion, while the nickel, silver, or tin plating on its surface effectively resists oxidation and sulfide corrosion.

[0029] Specifically, the insulating layer 2 is made of cross-linked polyethylene. Cross-linked polyethylene has excellent resistance to moisture and chemical corrosion. Depending on the application environment, fluoropolymers, silicone rubber, etc., can also be selected as the insulating layer. Fluoropolymers are resistant to acids and alkalis and solvents, while silicone rubber is resistant to damp heat and salt spray, making it suitable for marine environments.

[0030] Specifically, the metal sheath 3 is a thin copper strip or stainless steel strip that has undergone insulation treatment to improve corrosion resistance and is suitable for extreme corrosive environments.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A corona-resistant and corrosion-resistant electromagnetic wire, characterized in that, It includes a conductor body (1), an insulation layer (2), a corona-resistant layer (4) and a sealing coating (5). The insulation layer (2) covers the conductor body (1), the corona-resistant layer (4) is disposed on the outside of the insulation layer (2), and the sealing coating (5) is applied to the outer surface of the corona-resistant layer (4). A metal sheath (3) is provided between the insulating layer (2) and the corona-resistant layer (4). The metal sheath (3) covers the outside of the insulating layer (2). The corona-resistant layer (4) includes a bottom base insulating layer (41), a middle corona-resistant coating layer (42), and an outer adhesion layer (43).

2. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The outer layer of the insulating layer (2) is covered with a semiconductor shielding layer, which is a silicon carbide coating, and the semiconductor shielding layer is located between the insulating layer (2) and the metal sheath (3).

3. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The basic insulating layer (41) is a PI film. The bottom surface of the basic insulating layer (41) is tightly bonded to the metal sheath (3). The corona-resistant coating (42) is a silicone resin with nanofiller. The adhesion layer (43) is an epoxy resin coating that has been plasma-treated. The inner layer of the insulating layer (2) is tightly bonded to the adhesion layer (43).

4. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 3, characterized in that, The thickness of the corona-resistant coating (42) is 0.05 mm to 0.06 mm, and the nanofiller is nano-alumina or nano-boron nitride.

5. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The sealing coating (5) includes an epoxy resin layer (51) as the bottom layer, a polyurethane layer (52) as the middle layer, and a fluorocarbon coating (53) as the outer layer.

6. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The conductor body (1) is made of copper-chromium alloy, and the surface of the conductor body (1) is plated with nickel.

7. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The insulating layer (2) is made of cross-linked polyethylene.

8. The corona-resistant and corrosion-resistant electromagnetic wire according to claim 1, characterized in that, The metal sheath (3) is a thin copper strip or stainless steel strip that has been insulated.

Images