CN114093556A - Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof - Google Patents

Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof Download PDF

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Publication number
CN114093556A
CN114093556A CN202111181102.4A CN202111181102A CN114093556A CN 114093556 A CN114093556 A CN 114093556A CN 202111181102 A CN202111181102 A CN 202111181102A CN 114093556 A CN114093556 A CN 114093556A
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parts
corona
coating
resistant
energy automobile
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赵俊
苏保信
王清华
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Tongling Jingda New Technology Development Co ltd
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Tongling Jingda New Technology Development Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
    • H01B13/165—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying by spraying
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/30—Drying; Impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat

Abstract

The invention discloses a corona-resistant electromagnetic wire for a new energy automobile driving motor, which is characterized by comprising a conductor and an insulating coating coated on the surface of the conductor, wherein the insulating coating sequentially comprises an inner coating, a middle coating and an outer coating from inside to outside; the outer coating is prepared from the following components in parts by weight: 55-65 parts of organic silicon modified polyamide imide, 3-5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2-4 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 5-8 parts of vinyl trimethoxy silane, 4-6 parts of wear-resistant components, 20-30 parts of solvent, 0.8-1.2 parts of initiator, 0.5-0.8 part of phosphorus pentoxide and 0.1-0.3 part of polyphosphoric acid. The invention also discloses a preparation method of the corona-resistant electromagnetic wire for the new energy automobile driving motor. The corona-resistant electromagnetic wire for the new energy automobile driving motor disclosed by the invention has the advantages of obvious corona-resistant effect, excellent heat resistance, wear resistance and aging resistance and strong adhesive force.

Description

Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof
Technical Field
The invention relates to the technical field of new energy automobile driving motor accessory preparation, in particular to a corona-resistant electromagnetic wire for a new energy automobile driving motor and a preparation method thereof.
Background
With the continuous exhaustion of energy, new energy automobiles become the key point of research of people, electric automobiles as new energy automobiles are the most easily realized mass production at present and are generally concerned by people, while driving motors as one of the core technologies of electric automobiles are the key point of research of the industry all the time, and the current driving motors are basically permanent magnet synchronous motors with single output shafts, are installed at the bottom of the electric automobiles and provide power for the automobiles. The motor coil of the drive motor is formed by winding magnet wires, which are important components of the drive motor, even referred to as heart components, and therefore the technical requirements for magnet wires are extremely stringent. The development of the electromagnetic wire with excellent comprehensive performance and performance stability is one of important measures for improving the performance of the driving motor of the new energy automobile and prolonging the service life of the driving motor, and has very important significance.
The new energy automobile driving motor has the advantages that as the electric fields of the stator windings at the winding end parts of the ventilation notch and the linear slot outlet are concentrated, when the electric field intensity of a local position reaches a certain value, the gas is locally ionized, and blue fluorescence, namely corona phenomenon, appears at the ionized position. The corona generates heat effect and oxide of ozone and helium, so that the local temperature in the winding coil is increased, the adhesive is deteriorated, carbonized, insulated by the strands and the mica is whitened, the strands are loosened, insulated and aged, and short circuit is caused, and the use of the driving motor is influenced. Therefore, the quality of the corona resistance effect of the electromagnetic wire is directly related to the service life of the driving motor of the new energy automobile. However, electromagnetic wires for new energy automobile driving motors on the market have the defects of poor heat resistance and corona resistance, insufficient adhesive force and poor wear resistance and aging resistance.
In order to solve the problems, the Chinese invention patent CN104804503B discloses a corona-resistant enameled wire for a new energy automobile and a manufacturing method thereof, wherein an insulating layer outside a conductor is coated with three insulating coatings from inside to outside, the coating for the outer coating comprises a lubricating wear-resistant component, a solvent and a base paint, the lubricating wear-resistant component is a mixture of molybdenum disulfide, sepiolite powder, polytetrafluoroethylene, polyethylene wax and silicone oil, the solvent is a mixture of N-methylpyrrolidone and xylene, and the base paint is polyamideimide paint; the coating thickness ratio is as follows: 15-25% of inner coating, 60-70% of intermediate coating and 15-17% of outer coating. The static friction coefficient of the corona-resistant enameled wire can be reduced, the corona resistance of the corona-resistant paint is improved, the effect is good, and the corona-resistant enameled wire can be suitable for a new energy automobile driving motor.
The corona-resistant electromagnetic wire for the new energy automobile driving motor and the preparation method thereof are still needed in the field, wherein the corona-resistant electromagnetic wire has the advantages of remarkable corona-resistant effect, excellent heat resistance, wear resistance and aging resistance and strong adhesive force.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a corona-resistant electromagnetic wire for a new energy automobile driving motor, which has the advantages of obvious corona-resistant effect, excellent heat resistance, wear resistance and aging resistance and strong adhesive force, and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the corona-resistant electromagnetic wire for the new energy automobile driving motor is characterized by comprising a conductor and an insulating coating coated on the surface of the conductor, wherein the insulating coating sequentially comprises an inner coating, a middle coating and an outer coating from inside to outside; the outer coating is prepared from the following components in parts by weight: 55-65 parts of organic silicon modified polyamide imide, 3-5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2-4 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 5-8 parts of vinyl trimethoxy silane, 4-6 parts of wear-resistant components, 20-30 parts of solvent, 0.8-1.2 parts of initiator, 0.5-0.8 part of phosphorus pentoxide and 0.1-0.3 part of polyphosphoric acid.
Preferably, the conductor is a copper conductor wrapped by graphene fibers; the thickness of the conductor is 2-8mm, and the width of the conductor is 3-18 mm; the number of layers of the graphene fiber is one or two; the specification of the graphene fiber is 100-500.
Preferably, the inner coating is made of a 180-grade polyester imide coating of the MT533 type manufactured by the allentas electrical insulation (cupling) limited.
Preferably, the midcoat is made of a 38SAS type 200 grade corona resistant coating manufactured by taiwan fubao chemical limited.
Preferably, the thickness of the inner coating is 12-18 μm; the thickness of the middle coating is 60-80 μm; the thickness of the outer coating is 10-20 μm.
Preferably, the source of the organosilicon modified polyamide imide is not particularly required, and in one embodiment of the invention, the preparation method of the organosilicon modified polyamide imide is described in example 1 of patent CN 112679691A.
Preferably, the wear-resistant component comprises the following components in parts by weight: 15-25 parts of attapulgite, 30-40 parts of molybdenum disulfide and 20-30 parts of fluorinated graphene.
Preferably, the particle size of the wear-resistant component is 900-1200 meshes.
Preferably, the initiator is at least one of azobisisobutyronitrile and azobisisoheptonitrile.
Preferably, the solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
Another object of the present invention is to provide a method for preparing a corona-resistant electromagnetic wire for a driving motor of a new energy vehicle, including the steps of:
step S101, sequentially coating an inner coating and a middle coating on the surface of a conductor, adopting multiple coating until the required thickness of each layer is achieved, and drying and then waiting for treatment;
and S102, uniformly mixing the components of the outer coating according to the parts by weight, grinding, sieving, coating the surface of the middle coating obtained by the treatment in the S101, drying at 70-80 ℃ for 1-2 hours, and drying at 180-200 ℃ to constant weight to obtain the corona-resistant electromagnetic wire finished product for the driving motor of the new energy automobile.
Detailed Description
The following detailed description of preferred embodiments of the invention will be made.
The corona-resistant electromagnetic wire for the new energy automobile driving motor is characterized by comprising a conductor and an insulating coating coated on the surface of the conductor, wherein the insulating coating sequentially comprises an inner coating, a middle coating and an outer coating from inside to outside; the outer coating is prepared from the following components in parts by weight: 55-65 parts of organic silicon modified polyamide imide, 3-5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2-4 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 5-8 parts of vinyl trimethoxy silane, 4-6 parts of wear-resistant components, 20-30 parts of solvent, 0.8-1.2 parts of initiator, 0.5-0.8 part of phosphorus pentoxide and 0.1-0.3 part of polyphosphoric acid.
Preferably, the conductor is a copper conductor wrapped by graphene fibers; the thickness of the conductor is 2-8mm, and the width of the conductor is 3-18 mm; the number of layers of the graphene fiber is one or two; the specification of the graphene fiber is 100-500.
Preferably, the inner coating is made of a 180-grade polyester imide coating of the MT533 type manufactured by the allentas electrical insulation (cupling) limited.
Preferably, the midcoat is made of a 38SAS type 200 grade corona resistant coating manufactured by taiwan fubao chemical limited.
Preferably, the thickness of the inner coating is 12-18 μm; the thickness of the middle coating is 60-80 μm; the thickness of the outer coating is 10-20 μm.
Preferably, the source of the organosilicon modified polyamide imide is not particularly required, and in one embodiment of the invention, the preparation method of the organosilicon modified polyamide imide is described in example 1 of patent CN 112679691A.
Preferably, the wear-resistant component comprises the following components in parts by weight: 15-25 parts of attapulgite, 30-40 parts of molybdenum disulfide and 20-30 parts of fluorinated graphene.
Preferably, the particle size of the wear-resistant component is 900-1200 meshes.
Preferably, the initiator is at least one of azobisisobutyronitrile and azobisisoheptonitrile.
Preferably, the solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
Another object of the present invention is to provide a method for preparing a corona-resistant electromagnetic wire for a driving motor of a new energy vehicle, including the steps of:
step S101, sequentially coating an inner coating and a middle coating on the surface of a conductor, adopting multiple coating until the required thickness of each layer is achieved, and drying and then waiting for treatment;
and S102, uniformly mixing the components of the outer coating according to the parts by weight, grinding, sieving, coating the surface of the middle coating obtained by the treatment in the S101, drying at 70-80 ℃ for 1-2 hours, and drying at 180-200 ℃ to constant weight to obtain the corona-resistant electromagnetic wire finished product for the driving motor of the new energy automobile.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the corona-resistant electromagnetic wire for the new energy automobile driving motor, the graphene fiber is wound and wrapped on the copper conductor through selection of the inner conductor, so that the conductivity and the bonding performance between the copper conductor and the insulating coating are effectively improved; through reasonable selection of the components and contents of the outer coating and mutual cooperation and combined action of the components and the contents, the corona-resistant electromagnetic wire for the manufactured new energy automobile driving motor has the advantages of remarkable corona-resistant effect, excellent heat resistance, wear resistance and aging resistance and strong adhesive force. The components can finally form an interpenetrating network structure, so that the performance is effectively improved, and the service life of the product is effectively prolonged.
The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:
example 1
The corona-resistant electromagnetic wire for the new energy automobile driving motor is characterized by comprising a conductor and an insulating coating coated on the surface of the conductor, wherein the insulating coating sequentially comprises an inner coating, a middle coating and an outer coating from inside to outside; the outer coating is prepared from the following components in parts by weight: 55 parts of organic silicon modified polyamide imide, 3 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 5 parts of vinyl trimethoxy silane, 4 parts of wear-resistant components, 20 parts of solvent, 0.8 part of initiator, 0.5 part of phosphorus pentoxide and 0.1 part of polyphosphoric acid.
The conductor is a copper conductor wrapped by graphene fibers; the thickness of the conductor is 5mm, and the width of the conductor is 10 mm; the number of layers of the graphene fiber is one; the graphene fiber has a specification of 100.
The inner coating is made of MT533 type 180-grade polyester-imide coating produced by Erentas electrical insulation material (Tongling) Co., Ltd; the intermediate coating is made of 38SAS type 200-grade corona-resistant coating produced by Taiwan Fubao chemical company Limited; the thickness of the inner coating is 12 μm; the thickness of the middle coating is 60 mu m; the thickness of the outer coating is 10 μm; the preparation method of the organic silicon modified polyamide imide is referred to example 1 of the invention patent CN 112679691A.
The wear-resistant component comprises the following components in parts by weight: 15 parts of attapulgite, 30 parts of molybdenum disulfide and 20 parts of fluorinated graphene; the particle size of the wear-resistant component is 900 meshes; the initiator is azobisisobutyronitrile; the solvent is dimethyl sulfoxide.
A preparation method of the corona-resistant electromagnetic wire for the new energy automobile driving motor is characterized by comprising the following steps:
step S101, sequentially coating an inner coating and a middle coating on the surface of a conductor, adopting multiple coating until the required thickness of each layer is achieved, and drying and then waiting for treatment;
and S102, uniformly mixing the components of the outer coating in parts by weight, grinding, sieving, coating the surface of the middle coating obtained by the treatment in the step S101, drying at 70 ℃ for 1 hour, and drying at 180 ℃ to constant weight to obtain the corona-resistant electromagnetic wire finished product for the driving motor of the new energy automobile.
Example 2
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that the outer coating is prepared from the following components in parts by weight: 57 parts of organic silicon modified polyamide imide, 3.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2.5 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 6 parts of vinyltrimethoxysilane, 4.5 parts of a wear-resistant component, 23 parts of a solvent, 0.9 part of an initiator, 0.6 part of phosphorus pentoxide and 0.15 part of polyphosphoric acid; the wear-resistant component comprises the following components in parts by weight: 17 parts of attapulgite, 33 parts of molybdenum disulfide and 23 parts of fluorinated graphene.
Example 3
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that the outer coating is prepared from the following components in parts by weight: 60 parts of organic silicon modified polyamide imide, 4 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 6.5 parts of vinyl trimethoxy silane, 5 parts of a wear-resistant component, 25 parts of a solvent, 1 part of an initiator, 0.65 part of phosphorus pentoxide and 0.2 part of polyphosphoric acid; the wear-resistant component comprises the following components in parts by weight: 20 parts of attapulgite, 35 parts of molybdenum disulfide and 25 parts of fluorinated graphene.
Example 4
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that the outer coating is prepared from the following components in parts by weight: 63 parts of organic silicon modified polyamide imide, 4.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3.5 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 7.5 parts of vinyl trimethoxy silane, 5.5 parts of an abrasion-resistant component, 28 parts of a solvent, 1.1 parts of an initiator, 0.75 part of phosphorus pentoxide and 0.25 part of polyphosphoric acid; the wear-resistant component comprises the following components in parts by weight: 23 parts of attapulgite, 38 parts of molybdenum disulfide and 28 parts of fluorinated graphene.
Example 5
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that the outer coating is prepared from the following components in parts by weight: 65 parts of organic silicon modified polyamide imide, 5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 4 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 8 parts of vinyl trimethoxy silane, 6 parts of wear-resistant components, 30 parts of solvent, 1.2 parts of initiator, 0.8 part of phosphorus pentoxide and 0.3 part of polyphosphoric acid; the wear-resistant component comprises the following components in parts by weight: 25 parts of attapulgite, 40 parts of molybdenum disulfide and 30 parts of fluorinated graphene.
Comparative example 1
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that polyamide imide is used to replace organosilicon modified polyamide imide.
Comparative example 2
The corona-resistant electromagnetic wire for the new energy automobile driving motor is basically the same as that in example 1, except that 4-vinyl-2, 8-bis (trifluoromethyl) quinoline and fluorinated graphene are not added.
In order to further illustrate the beneficial technical effects of the corona-resistant electromagnetic wire for the new energy automobile driving motor related to each embodiment, the corona-resistant electromagnetic wire for the new energy automobile driving motor manufactured by each embodiment is subjected to related performance tests, and the test method refers to the current corresponding national standard in China, and the results are shown in table 1.
TABLE 1
Test items Unit of Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2
Corona resistance life at 150 ℃ H 1030 1035 1042 1046 1052 987 973
Breakdown voltage kV 10.05 10.13 10.20 10.27 10.30 8.6 9.2
Coefficient of static friction — ＜0.05 ＜0.04 ＜0.04 ＜0.03 ＜0.03 ＞0.09 ＞0.12
As can be seen from the above table, the corona-resistant electromagnetic wire for the driving motor of the new energy automobile disclosed in the embodiment of the present invention has better corona resistance, insulation performance and wear resistance than the comparative example, which is a result of the combined action of the components and the structure.
The above-mentioned embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (9)

1. The corona-resistant electromagnetic wire for the new energy automobile driving motor is characterized by comprising a conductor and an insulating coating coated on the surface of the conductor, wherein the insulating coating sequentially comprises an inner coating, a middle coating and an outer coating from inside to outside; the outer coating is prepared from the following components in parts by weight: 55-65 parts of organic silicon modified polyamide imide, 3-5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 2-4 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 5-8 parts of vinyl trimethoxy silane, 4-6 parts of wear-resistant components, 20-30 parts of solvent, 0.8-1.2 parts of initiator, 0.5-0.8 part of phosphorus pentoxide and 0.1-0.3 part of polyphosphoric acid.
2. The corona-resistant electromagnetic wire for the new energy automobile driving motor according to claim 1, wherein the conductor is a copper conductor wrapped with graphene fibers; the thickness of the conductor is 2-8mm, and the width of the conductor is 3-18 mm; the number of layers of the graphene fiber is one or two; the specification of the graphene fiber is 100-500.
3. The corona-resistant electromagnetic wire for the new-energy automobile drive motor according to claim 1, wherein the inner coating layer is made of an MT 533-type 180-grade polyester-imide paint manufactured by einstein electrical insulation (holy) ltd; the midcoat was made of a 38SAS type 200 grade corona resistant coating manufactured by taiwan fubao chemical limited.
4. The corona-resistant magnet wire for a new energy automobile drive motor according to claim 1, wherein the thickness of the inner coating layer is 12 to 18 μm; the thickness of the middle coating is 60-80 μm; the thickness of the outer coating is 10-20 μm.
5. The corona-resistant electromagnetic wire for the new energy automobile driving motor as claimed in claim 1, wherein the wear-resistant component comprises the following components in parts by weight: 15-25 parts of attapulgite, 30-40 parts of molybdenum disulfide and 20-30 parts of fluorinated graphene.
6. The corona-resistant electromagnetic wire for the driving motor of the new energy automobile as claimed in claim 1, wherein the particle size of the wear-resistant component is 900-1200 mesh.
7. The corona-resistant magnet wire for the new-energy automobile driving motor according to claim 1, wherein the initiator is at least one of azobisisobutyronitrile and azobisisoheptonitrile.
8. The corona-resistant electromagnetic wire for the new energy automobile driving motor according to claim 1, wherein the solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
9. A method for manufacturing corona-resistant magnet wires for a new energy automobile driving motor according to any one of claims 1 to 8, comprising the steps of:
step S101, sequentially coating an inner coating and a middle coating on the surface of a conductor, adopting multiple coating until the required thickness of each layer is achieved, and drying and then waiting for treatment;
and S102, uniformly mixing the components of the outer coating according to the parts by weight, grinding, sieving, coating the surface of the middle coating obtained by the treatment in the S101, drying at 70-80 ℃ for 1-2 hours, and drying at 180-200 ℃ to constant weight to obtain the corona-resistant electromagnetic wire finished product for the driving motor of the new energy automobile.
CN202111181102.4A 2021-10-11 2021-10-11 Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof Pending CN114093556A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
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