CN116313330A - Corona-resistant soft composite material for electric automobile motor and preparation method thereof - Google Patents
Corona-resistant soft composite material for electric automobile motor and preparation method thereof Download PDFInfo
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- CN116313330A CN116313330A CN202210511383.3A CN202210511383A CN116313330A CN 116313330 A CN116313330 A CN 116313330A CN 202210511383 A CN202210511383 A CN 202210511383A CN 116313330 A CN116313330 A CN 116313330A
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- composite material
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- corona
- electric automobile
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- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000013329 compounding Methods 0.000 claims description 33
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- 239000010445 mica Substances 0.000 claims description 23
- 229910052618 mica group Inorganic materials 0.000 claims description 23
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 20
- 229920006231 aramid fiber Polymers 0.000 claims description 20
- 239000002904 solvent Substances 0.000 claims description 20
- 239000012790 adhesive layer Substances 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 11
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 8
- 150000008064 anhydrides Chemical class 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000007731 hot pressing Methods 0.000 claims description 8
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 238000009966 trimming Methods 0.000 claims description 8
- 239000002383 tung oil Substances 0.000 claims description 8
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- XBIUWALDKXACEA-UHFFFAOYSA-N 3-[bis(2,4-dioxopentan-3-yl)alumanyl]pentane-2,4-dione Chemical compound CC(=O)C(C(C)=O)[Al](C(C(C)=O)C(C)=O)C(C(C)=O)C(C)=O XBIUWALDKXACEA-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 description 13
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 8
- 240000002834 Paulownia tomentosa Species 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 6
- 238000011417 postcuring Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/60—Composite insulating bodies
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Insulating Bodies (AREA)
Abstract
The invention provides a corona-resistant soft composite material for an electric automobile motor and a preparation method thereof, and relates to the technical field of composite material preparation.
Description
Technical Field
The invention relates to the technical field of composite material preparation, in particular to a corona-resistant soft composite material for an electric automobile motor and a preparation method thereof.
Background
Along with the application of high-frequency, high-voltage and high-power electronic devices such as SiC, gaN and the like in an electric automobile driving motor controller, the frequency and the like of the electric automobile driving motor are obviously increased. Because the high-voltage and high-frequency PWM modulation of the driving motor controller generates excessive dielectric stress on the driving motor winding, the insulation material/insulation system of the driving motor generates serious partial discharge and corona corrosion, dielectric loss and heating of the insulation material/insulation system are aggravated, and electrothermal ageing of the insulation material/insulation system is accelerated.
To improve corona corrosion resistance of an electric automobile motor, it is critical to improve corona resistance of an insulating material so that the insulating material can resist the influence of high-frequency pulse voltage. The existing soft composite materials for the electric automobile motor mainly comprise aramid fiber paper/polyester film/aramid fiber paper composite materials and aramid fiber paper/polyimide film/aramid fiber paper composite materials, and the soft composite materials have excellent use manufacturability, high breakdown voltage and other performances, but have poor corona resistance performance and cannot meet the serious corona corrosion damage caused by a new generation of high-frequency controller.
The corona-resistant groove insulating material prepared by the patent CN103400638B is film 2-sided composite mica paper, has excellent corona resistance, and is mainly suitable for industrial variable frequency motors. However, the electric automobile motor has high slot filling rate due to high power density and high use manufacturability requirement on soft composite paper. The corona-resistant slot insulating material prepared by CN103400638B is easy to damage in the use process of the high-slot-full-rate motor, so that breakdown damage is caused, and the application in the field of electric automobile motors is limited.
Therefore, a novel corona-resistant soft composite material needs to be developed to meet the use manufacturability and insulation technical requirements of the electric automobile motor.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the corona-resistant soft composite material for the electric automobile motor and the preparation method thereof, and the composite material has the advantages of good corona-resistant service life, excellent insulating property, good use manufacturability and low cost, and is beneficial to industrialized mass production and popularization and application.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a composite material, which has a structure from top to bottom, comprising a first adhesive layer, an alkali-free glass cloth layer, a first adhesive layer, calcined mica paper, a second adhesive layer and aramid fiber paper.
Further, the raw materials of the first adhesive layer comprise epoxy resin, bismaleimide, tung oil anhydride and an accelerator.
Further, the raw materials of the first adhesive layer comprise epoxy resin in percentage by weight: 40-60%; 7-20% of bismaleimide; 40-60% of tung oil anhydride; the content of the accelerator is 0.5-2%.
Further, the accelerator comprises one or more of DMP-30, aluminum acetylacetonate and imidazole.
Further, the thickness of the alkali-free glass cloth layer is 0.02-0.035mm.
Further, the calcined mica paper has a quantitative value of 160-250g/m 2 The thickness is 0.1-0.2mm.
Further, the thickness of the aramid fiber paper is 0.05-0.2mm.
Further, the second adhesive layer is a polyurethane adhesive.
Further, during the compounding of the first adhesive layer, toluene and/or acetone are used for dissolving into 40-60% by weight of solid-containing glue solution (here, solid-containing specifically refers to solid components).
Further, the second adhesive layer is dissolved using acetone when being compounded.
Further, the invention also provides a preparation method of the composite material, which comprises the following steps:
and (3) after unreeling the alkali-free glass cloth layer, coating a first adhesive on the upper surface and the lower surface, removing a solvent (toluene and/or acetone), compounding and calcining the mica paper on the upper surface, removing the solvent (toluene and/or acetone) after compounding and flattening by a compression roller, coating a second adhesive on the surface of the calcined mica paper, removing the solvent (acetone), compounding aramid fiber paper on the surface of the second adhesive layer, compounding and flattening by hot pressing, cooling, rolling, curing, and trimming to obtain the composite material.
The invention has the technical effects that:
1. the corona-resistant soft composite material for the electric automobile motor is prepared by utilizing the excellent corona resistance of mica, reducing partial discharge and improving the corona resistance of the material, and the corona-resistant service life of the prepared corona-resistant soft composite material is prolonged by more than 50 times compared with the traditional soft composite material of the electric automobile motor.
2. The use process is good. Compared with other mica modified soft composite materials, the mica modified soft composite material has excellent use manufacturability and meets the use requirements of high-slot-filling-rate motors such as electric automobile motors.
3. Compared with the existing soft composite material of the electric automobile motor, the insulating material provided by the invention has low cost, and is beneficial to industrialized mass production and popularization and application.
4. When the motor is manufactured, the corona-resistant soft composite material and the alkali-free glass cloth cover are contacted with the winding wires, so that the insulating overall performance is improved when the insulating is impregnated by impregnating resin to be coated.
Drawings
Fig. 1 is a schematic structural diagram of the corona-resistant soft composite material for the electric automobile motor.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Before the embodiments of the invention are explained in further detail, it is to be understood that the invention is not limited in its scope to the particular embodiments described below; it is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It should be noted that the raw materials used in the present invention are all common commercial products, and therefore the sources thereof are not particularly limited.
The structural schematic diagram of the corona-resistant soft composite material for the electric automobile motor is shown in fig. 1.
Example 1
The corona-resistant soft composite material for the electric automobile motor is prepared by the following steps: on a compounding device, unwinding alkali-free glass cloth with the thickness of 0.03mm, coating epoxy tung Ma Jiaonian agent glue solution on two sides of a glue groove, baking to remove solvent through a baking channel with the temperature set to 90 ℃, calcining mica paper with the compounding thickness of 0.15mm, compounding and flattening through a pressing roller, baking to remove solvent through a baking channel with the temperature set to 110 ℃, coating commercial polyurethane glue solution on the upper surface of the calcined mica paper through a steel roller, baking to remove solvent through a baking channel with the temperature set to 100 ℃, compounding 0.05mm aramid fiber paper on the calcined mica paper, compounding and flattening through hot pressing, cooling, rolling, post-curing for 48h in a baking room with the temperature set to 90 ℃, and trimming to obtain the corona-resistant soft composite material for the electric automobile motor.
The epoxy tung Ma Jiaonian agent consists of 128 epoxy 50%; 8% of bismaleimide; 40.5% of tung oil anhydride; DMP-30 was 1.5% in composition. The glue solution is prepared by blending the adhesive with a mixed solvent of toluene and acetone in a mass ratio of 1:1 to obtain a cured content of 40%.
Example 2
The corona-resistant soft composite material for the electric automobile motor is prepared by the following steps: on a compounding device, unwinding alkali-free glass cloth with the thickness of 0.032mm, coating epoxy tung Ma Jiaonian agent glue solution on two sides of a glue groove, baking to remove solvent through a baking channel with the temperature set at 95 ℃, compounding mica paper with the thickness of 0.148mm, compounding and flattening through a pressing roller, baking to remove solvent through a baking channel with the temperature set at 100 ℃, coating commercial polyurethane glue solution on the upper surface of the calcined mica paper through a steel roller, baking to remove solvent through a baking channel with the temperature set at 98 ℃, compounding 0.05mm aramid fiber paper on the calcined mica paper, compounding and flattening through hot pressing, cooling, rolling, post-curing for 48h in a baking room with the temperature set at 85 ℃, and trimming to obtain the corona-resistant soft composite material for the electric automobile motor.
The epoxy tung Ma Jiaonian agent consists of 40% of F51 epoxy, 5% of 601 epoxy and 10% of bismaleimide; 43.85% of tung oil anhydride; 1.2% of aluminum acetylacetonate. The glue solution is prepared by blending the adhesive with a mixed solvent of toluene and acetone in a mass ratio of 2:1 to obtain a cured content of 45%.
Example 3
The corona-resistant soft composite material for the electric automobile motor is prepared by the following steps: on a compounding device, unwinding alkali-free glass cloth with the thickness of 0.035mm, coating epoxy tung Ma Jiaonian agent glue solution on two sides of a glue groove, baking to remove solvent through a baking channel with the temperature set at 100 ℃, compounding mica paper with the thickness of 0.15mm, compounding and flattening through a pressing roller, baking to remove solvent through a baking channel with the temperature set at 103 ℃, coating commercial polyurethane glue solution on the upper surface of the calcined mica paper through a steel roller, baking to remove solvent through a baking channel with the temperature set at 110 ℃, compounding 0.05mm aramid fiber paper on the calcined mica paper, compounding and flattening through hot pressing, cooling, rolling, post-curing for 48h in a baking room with the temperature set at 90 ℃, and trimming to obtain the corona-resistant soft composite material for the electric automobile motor.
The epoxy tung Ma Jiaonian agent is prepared from 6101 epoxy 48% and bismaleimide 8%; 42.8% of tung oil anhydride; 1.2% of 2-methylimidazole. The glue solution is prepared by blending the adhesive with a mixed solvent of toluene and acetone in a mass ratio of 2:1 to obtain a cured content of 43%.
Comparative example 1
Unreeling a 0.13mm polyimide film, coating a commercial polyurethane adhesive on both sides of the adhesive groove, baking to remove a solvent through a baking channel with the temperature set to be 100 ℃, compounding the aramid fiber paper with 0.05mm on both sides, hot-pressing, compounding and flattening, cooling, reeling, post-curing for 48 hours in a baking room with the temperature of 85 ℃, and trimming to obtain the aramid fiber paper/polyimide film/aramid fiber paper soft composite material.
Comparative example 2
Unreeling a 0.15mm polyimide film, coating a commercial polyurethane adhesive on both sides of the adhesive groove, baking to remove a solvent through a baking channel with the temperature set to 105 ℃, compounding the aramid fiber paper with 0.06mm on both sides, hot-pressing, compounding, flattening, cooling, reeling, post-curing for 48 hours in a baking room with the temperature of 85 ℃, and trimming to obtain the aramid fiber paper/polyimide film/aramid fiber paper soft composite material.
Comparative example 3
The corona-resistant soft composite material for the electric automobile motor is prepared by the following steps: on a compounding device, unwinding alkali-free glass cloth with the thickness of 0.03mm, coating epoxy tung Ma Jiaonian agent glue solution on two sides of a glue groove, baking to remove solvent through a baking channel with the temperature set to 90 ℃, compounding polyimide film with the thickness of 0.15mm, compounding and flattening through a pressing roller, baking to remove solvent through a baking channel with the temperature set to 110 ℃, coating commercial polyurethane glue solution on the upper surface of calcined mica paper through a steel roller, baking to remove solvent through a baking channel with the temperature set to 100 ℃, compounding 0.05mm aramid fiber paper on the calcined mica paper surface, hot-pressing and compounding to flatten, cooling, rolling, post-curing for 48h in a baking room with the temperature set to 90 ℃, and trimming to obtain the corona-resistant soft composite material for the electric automobile motor.
The epoxy tung Ma Jiaonian agent consists of 128 epoxy 50%; 8% of bismaleimide; 40.5% of tung oil anhydride; DMP-30 was 1.5% in composition. The glue solution is prepared by blending the adhesive with a mixed solvent of toluene and acetone in a mass ratio of 1:1 to obtain a cured content of 40%.
Performance testing
The test method comprises the following steps:
1. the thickness and breakdown voltage are detected according to the test standard of GB/T5591.2-2017 soft composite material for electrical insulation second part test method.
2. The corona-resistant life test conditions were: the voltage is 3000V, the frequency is 20KHz, the temperature is 155 ℃, and the pulse rising time is 50ns.
TABLE 1
As can be seen from table 1, the corona resistant soft composite material for electric automobile motor according to the present invention has significantly improved corona resistant life compared to the existing slot insulating material.
Finally, it should be noted that the above description is only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and that the simple modification and equivalent substitution of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A composite material characterized by: the structure from top to bottom is a first adhesive layer, an alkali-free glass cloth layer, a first adhesive layer, calcined mica paper, a second adhesive layer and aramid fiber paper.
2. The composite material of claim 1, wherein: the raw materials of the first adhesive layer comprise epoxy resin, bismaleimide, tung oil anhydride and an accelerator.
3. The composite material of claim 1, wherein: the raw materials of the first adhesive layer comprise epoxy resin in percentage by weight: 40-60%; 7-20% of bismaleimide; 40-60% of tung oil anhydride; the content of the accelerator is 0.5-2%.
4. The composite material of claim 2, wherein: the promoter comprises one or more of DMP-30, aluminum acetylacetonate and imidazole.
5. The composite material of claim 1, wherein: the thickness of the alkali-free glass cloth layer is 0.02-0.035mm.
6. According toThe composite material of claim 1, wherein: the calcined mica paper has a ration of 160-250g/m 2 The thickness is 0.1-0.2mm.
7. The composite material of claim 1, wherein: the thickness of the aramid fiber paper is 0.05-0.2mm.
8. The composite material of claim 1, wherein: the second adhesive layer is polyurethane adhesive.
9. The composite material of claim 1, wherein: when the first adhesive layer is compounded, toluene and/or acetone are used for dissolving the first adhesive layer into 40-60% of solid-containing glue solution by weight percent.
10. A method of preparing a composite material according to any one of claims 1 to 9, wherein: the method comprises the following steps:
and (3) after unreeling the alkali-free glass cloth layer, coating a first adhesive on the upper surface and the lower surface, removing a solvent, compounding calcined mica paper on the upper surface, compounding and flattening by a compression roller, removing the solvent, coating a second adhesive on the surface of the calcined mica paper, removing the solvent, compounding aramid fiber paper on the surface of the second adhesive layer, compounding and flattening by hot pressing, cooling, coiling, curing, and trimming to obtain the composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210511383.3A CN116313330A (en) | 2022-05-11 | 2022-05-11 | Corona-resistant soft composite material for electric automobile motor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210511383.3A CN116313330A (en) | 2022-05-11 | 2022-05-11 | Corona-resistant soft composite material for electric automobile motor and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116313330A true CN116313330A (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210511383.3A Pending CN116313330A (en) | 2022-05-11 | 2022-05-11 | Corona-resistant soft composite material for electric automobile motor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116313330A (en) |
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2022
- 2022-05-11 CN CN202210511383.3A patent/CN116313330A/en active Pending
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