CN103400638A - Corona-resistant groove insulation material and preparation method thereof - Google Patents
Corona-resistant groove insulation material and preparation method thereof Download PDFInfo
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- CN103400638A CN103400638A CN201310325338XA CN201310325338A CN103400638A CN 103400638 A CN103400638 A CN 103400638A CN 201310325338X A CN201310325338X A CN 201310325338XA CN 201310325338 A CN201310325338 A CN 201310325338A CN 103400638 A CN103400638 A CN 103400638A
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Abstract
The invention relates to a corona-resistant groove insulation material and a preparation method thereof. The groove insulation material sequentially comprises a first adhesive layer, a first mica paper layer, a second adhesive layer, a film layer, a third adhesive layer, a second mica paper layer and a fourth adhesive layer from top to bottom, wherein the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer are respectively formed by nano modified adhesive, the nano modified adhesive is the adhesive which is mixed with nano powder body, the content of the nano powder body in the nano modified adhesive is 15 to 25 percent, and the granularity of the nano powder body is 20nm to 100nm. The corona-resistant service life of the insulation material can be improved by more than 50 times compared with the existing groove insulation material; and meanwhile, the paint quantity in the resin immersing process can be increased, and the mechanical property and the electric insulation performance of a curing system can be improved. In addition, the cost of the groove insulation material is lower, so that the industrialized mass production and popularization of the groove insulation material can be favored.
Description
Technical field
The present invention relates to a kind of insulating material, relate in particular to composite material of anti-corona of a kind of slot liner for variable-frequency motor etc. and preparation method thereof.
Background technology
Along with electrotechniical development, the significant variable-frequency motor of energy-saving effect is used widely in recent years.The advantage of the aspects such as the frequency converter that uses due to variable-frequency motor produces high-frequency pulse voltage, and the premature failure phenomenon of variable-frequency motor often appears in destructive extremely strong to insulation system, can not really bring into play the energy-conservation, efficient of variable-frequency motor, and is easy to use.Extend useful life and the operational reliability of variable-frequency motor, key is the corona-resistance property that will promote insulating material, the impact that can resist high-frequency pulse voltage.Variable-frequency motor now mainly contains polyester film polyester non-woven fabric composite material (DMD) with the slot liner material, polyester film and aromatic polyamide paper composite material (NMN), polyimide film and aromatic polyamide paper composite material (NHN) etc., these composite materials all exist the anti-corona life-span poor, can not promote the ability of variable-frequency motor opposing high-frequency pulse voltage.Therefore, existing electrical soft composite material can not meet the instructions for use of variable-frequency motor.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of slot liner material that has excellent corona-resistance property, meets the variable-frequency motor instructions for use is provided.
The present invention also provides a kind of preparation method of anti-corona slot liner material simultaneously.
For solving above technical problem, a kind of technical scheme that the present invention takes is:
A kind of anti-corona slot liner material, it comprises the first adhesive layer, the first mica paper layer, the second adhesive layer, thin layer, the 3rd adhesive layer, the second mica paper layer and the 4th adhesive layer that sets gradually from top to bottom, the first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer are formed by the nano modification adhesive respectively, the nano modification adhesive is the adhesive that is added with nano-powder, the mass content of nano-powder in the nano modification adhesive is 15%～25%, and the particle diameter of nano-powder is 20～100nm.
According to the present invention, described nano-powder can and be preferably one or more the combination that is selected from nano titanium oxide, nano silicon and nano-aluminium oxide.The particle diameter of nano-powder is preferably 20～80nm, more preferably 20～50nm.
Adhesive of the present invention can be commonly used those in this area, is not particularly limited.Described nano modification adhesive can, by add nano-powder in these known adhesive, obtain after being uniformly dispersed.The glue of nano modification adhesive is with the dissolving of nano modification adhesive or is distributed to the liquid system that forms in solvent.
Preferably, described nano modification adhesive is the nanometer modified epoxy adhesive.According to a concrete aspect, epoxy adhesive is comprised of CYD128 epoxy, F51 epoxy, 651 polyamide.According to another concrete aspect, epoxy adhesive is comprised of F44 epoxy, E20 epoxy, epoxy-ester, 651 polyamide.
Preferably, described the first mica paper layer, the second mica paper layer form by muscovite paper, are quantitatively 60～200g/m
2
According to the present invention, the thickness of described the first mica paper layer, the second mica paper layer can be respectively 0.05～0.2mm.Be preferably 0.10～0.15mm.
According to the present invention, described thin layer can and be preferably that the polyester film of 0.05～0.35mm(preferred 0.15～0.35mm) or polyimide film that thickness is 0.05～0.15mm form by thickness.
Preferably, described the first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer content summation in insulating material is 12%～40%.
Preferably, described anti-corona slot liner material prepares by the following method: at the glue of the coated on both sides nano modification adhesive of film, bake and bank up with earth the removal solvent through drying tunnel, at two sides combined mica paper, hot pressing is compound, again at the glue of mica paper surface uniform coated with nano modification adhesive, bake and bank up with earth the removal solvent through drying tunnel, cooling, after rolling, be cured processing, trimming, obtain, the mica flake of the first mica paper layer of the anti-corona slot liner of gained material is bonded together mutually under the effect that is penetrated into adhesive wherein, forms an integral body; The mica flake of gained the second mica paper layer is bonded together mutually under the effect that is penetrated into adhesive wherein, form an integral body.
The another technical scheme that the present invention takes is: a kind of preparation method of above-mentioned anti-corona slot liner material, at first, at the glue of the coated on both sides nano modification adhesive of film, bake and bank up with earth the removal solvent through drying tunnel, at two sides combined mica paper, hot pressing is compound, then at the glue of mica paper surface uniform coated with nano modification adhesive, bake and bank up with earth the removal solvent through drying tunnel, cooling, after rolling, be cured processing, trimming, obtain anti-corona slot liner material.
Further, be 22wt%～45wt% at the solid content of the glue of the coated nano modification adhesive in the two sides of film, be preferably 30wt%～45wt%; Solid content at the glue of the nano modification adhesive of mica paper surface-coated is 10wt%～21wt%, is preferably 14wt%～21wt%.
Due to the employing of above technical scheme, the present invention compared with prior art has following advantage:
1, utilized the corona-resistance property of mica excellence, and nano particle homogenizing electric field, reduce partial discharge, promote the corona-resistance property of material, preparing two-sided is the slot liner material of mica layer, more existing slot liner material of anti-corona life-span promotes more than 50 times.
2, due to two-sided be mica layer, extremely strong to the absorption of impregnating resin, dipping property, the band paint amount in can boosted tree impregnate with tallow process, promote mechanical property and the electrical insulation capability of curing system.
3, take insulating material of the present invention, can not use the high raw material of price such as aromatic polyamide paper, cost is low, is conducive to industrialized large-scale production and applies.
Description of drawings
Fig. 1 is the structural representation according to slot liner material of the present invention;
Embodiment
Referring to Fig. 1, anti-corona slot liner material of the present invention comprises that the first adhesive layer 1, the first mica paper layer 2, the second adhesive layer 3, thin layer 4, the 3rd adhesive layer 5, the second mica paper layer 6 and the 4th adhesive layer 7, the first adhesive layers, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer that set gradually are formed by the nano modification adhesive respectively from top to bottom.
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for explanation the present invention.The following percentage composition of mentioning all refers to the quality percentage composition.
Embodiment 1
The present embodiment provides a kind of anti-corona slot liner material, and its preparation method is as follows: on the coating equipment complex, thickness is that the 0.05mm polyester film unreels, soak nano modification adhesive glue A, the two sides frictioning, bake and bank up with earth the removal solvent through drying tunnel, the two sides composite thickness is the 0.10mm mica paper, and hot pressing is compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, rear curing is processed, trimming, obtain anti-corona slot liner material, and adhesive content is 15.6%.
Above-mentioned nano modification adhesive glue A is comprised of nanometer modified epoxy adhesive 36% and solvent (toluene+acetone) 64%;
Above-mentioned nano modification adhesive glue liquid B is comprised of nanometer modified epoxy adhesive 18% and solvent (toluene+acetone) 72%;
Above-mentioned nanometer modified epoxy adhesive is comprised of CYD128 epoxy 40%, F51 epoxy 18%, 651 polyamide 22%, nano silicon (particle diameter is 40nm approximately) 20%.
The present embodiment provides a kind of anti-corona slot liner material, its preparation method is as follows: on the coating equipment complex, thickness is that the 0.05mm polyimide film unreels, soak nano modification adhesive glue A, the two sides frictioning, bake and bank up with earth the removal solvent through drying tunnel, the two sides composite thickness is the 0.11mm mica paper, and hot pressing is compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, rear curing is processed, trimming, obtain anti-corona slot liner material, and adhesive content is 18.5%.
Above-mentioned nano modification adhesive glue A is comprised of nanometer modified epoxy adhesive 40% and solvent (toluene+acetone) 60%;
Above-mentioned nano modification adhesive glue liquid B is comprised of nanometer modified epoxy adhesive 15% and solvent (toluene+acetone) 85%;
Above-mentioned nanometer modified epoxy adhesive is comprised of F44 epoxy 22%, E20 epoxy 15%, epoxy-ester 25%, 651 polyamide 20%, nano titanium oxide (particle diameter is 25nm approximately) 18%.
The present embodiment provides a kind of anti-corona slot liner material, and its preparation method is as follows: on the coating equipment complex, thickness is that the 0.10mm polyester film unreels, soak nano modification adhesive glue A, the two sides frictioning, bake and bank up with earth the removal solvent through drying tunnel, the two sides composite thickness is the 0.12mm mica paper, and hot pressing is compound, even coated nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, rear curing is processed, trimming, obtain anti-corona slot liner material, and adhesive content is 13.7%.
Above-mentioned nano modification adhesive glue A is comprised of nanometer modified epoxy adhesive 35.1% and solvent (toluene+acetone) 64.9%;
Above-mentioned nano modification adhesive glue liquid B is comprised of nanometer modified epoxy adhesive 14.8% and solvent (toluene+acetone) 85.2%;
Above-mentioned nanometer modified epoxy adhesive is comprised of E51 epoxy 40%, novolac epoxy resin (431) 18%, 651 polyamide 22%, nano-aluminium oxide (particle diameter is 30nm approximately) 20%.
Embodiment 4
The present embodiment provides a kind of anti-corona slot liner material, its preparation method is as follows: on the coating equipment complex, thickness is that the polyimide film of 0.075mm unreels, soak nano modification adhesive glue A, the two sides frictioning, bake and bank up with earth the removal solvent through drying tunnel, the two sides composite thickness is the 0.10mm mica paper, and hot pressing is compound, even coated with nano modification adhesive glue liquid B on the mica paper on two sides, dry through drying tunnel, cooling, rolling, rear curing is processed, trimming, obtain anti-corona slot liner material, and adhesive content is 15.2%.
Above-mentioned nano modification adhesive glue A is comprised of nanometer modified epoxy adhesive 40.6% and solvent (toluene+acetone) 59.4%;
Above-mentioned nano modification adhesive glue liquid B is comprised of nanometer modified epoxy adhesive 20.2% and solvent (toluene+acetone) 79.8%.
Above-mentioned nanometer modified epoxy adhesive is by CYD128 epoxy 40%, F51 epoxy 18%, 651 polyamide 22%, and nanometer titanium dioxide two aluminium (particle diameter is 30nm approximately) 10%, nano silicon (particle diameter is 50nm approximately) 10% forms.
Anti-corona life test
The anti-corona slot liner material of embodiment 1～4 and variable-frequency motor are now carried out anti-corona life test with the slot liner material anti-corona life-span.Anti-corona life test condition is: voltage 3000V, frequency 20KHz, 155 ℃ of temperature, pulse rise time 50ns.Result is referring to table 1.
The anti-corona life-span contrast of table 1
| The slot liner composite material | Thickness (mm) | The anti-corona life-span (min) |
| Embodiment 1 | 0.282 | 2880 |
| |
0.306 | 3420 |
| |
0.369 | 3960 |
| Embodiment 4 | 0.305 | 3300 |
| Commercially available DMD | 0.32 | 35 |
| Commercially available NMN | 0.32 | 51 |
| Commercially available NHN | 0.32 | 62 |
As seen from Table 1, slot liner material more existing according to the anti-corona life-span of slot liner material of the present invention significantly improves.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations that Spirit Essence is done according to the present invention or modification, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. anti-corona slot liner material, it is characterized in that: comprise the first adhesive layer that sets gradually from top to bottom, the first mica paper layer, the second adhesive layer, thin layer, the 3rd adhesive layer, the second mica paper layer and the 4th adhesive layer, described the first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer is formed by the nano modification adhesive respectively, described nano modification adhesive is the adhesive that is added with nano-powder, the mass content of described nano-powder in described nano modification adhesive is 15%～25%, the particle diameter of nano-powder is 20～100nm.
2. anti-corona slot liner material according to claim 1 is characterized in that: described nano-powder is one or more the combination that is selected from nano titanium oxide, nano silicon and nano-aluminium oxide.
3. anti-corona slot liner material according to claim 1, it is characterized in that: described nano modification adhesive is the nanometer modified epoxy adhesive.
4. anti-corona slot liner material according to claim 1 is characterized in that: described the first mica paper layer, the second mica paper layer form by muscovite paper, are quantitatively 60～200g/m
2
5. according to claim 1 or 4 described anti-corona slot liner materials, it is characterized in that: the thickness of described the first mica paper layer, the second mica paper layer is respectively 0.05～0.2mm.
6. anti-corona slot liner material according to claim 1 is characterized in that: described thin layer is that the polyester film of 0.05～0.35mm or polyimide film that thickness is 0.05～0.15mm form by thickness.
7. anti-corona slot liner material according to claim 1, it is characterized in that: described the first adhesive layer, the second adhesive layer, the 3rd adhesive layer, the 4th adhesive layer content summation in described insulating material is 12%～40%.
8. anti-corona slot liner material according to claim 1, it is characterized in that: described anti-corona slot liner material prepares by the following method: at the glue of the coated on both sides nano modification adhesive of film, bake and bank up with earth the removal solvent through drying tunnel, at two sides combined mica paper, hot pressing is compound, again at the glue of mica paper surface uniform coated with nano modification adhesive, bake and bank up with earth the removal solvent through drying tunnel, cooling, after rolling, be cured processing, trimming, obtain, the mica flake of the first mica paper layer of the anti-corona slot liner of gained material is bonded together mutually under the effect that is penetrated into adhesive wherein, form an integral body, the mica flake of gained the second mica paper layer is bonded together mutually under the effect that is penetrated into adhesive wherein, form an integral body.
9. the preparation method of the described anti-corona slot liner material of any one claim in a claim 1 to 8 is characterized in that: at first, and at the glue of the coated on both sides nano modification adhesive of film, bake and bank up with earth the removal solvent through drying tunnel, at two sides combined mica paper, hot pressing is compound, then at the glue of mica paper surface uniform coated with nano modification adhesive, bake and bank up with earth the removal solvent through drying tunnel, cooling, after rolling, be cured processing, trimming, obtain anti-corona slot liner material.
10. anti-corona slot liner material according to claim 9 is characterized in that: the solid content at the glue of the coated nano modification adhesive in the two sides of film is 22wt%～45wt%; Solid content at the glue of the nano modification adhesive of mica paper surface-coated is 10wt%～21wt%.
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| CN201310325338.XA CN103400638B (en) | 2013-07-30 | 2013-07-30 | A kind of Corona-resistant groove insulation material and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104448705A (en) * | 2014-11-20 | 2015-03-25 | 绵阳润缘电工材料有限公司 | Preparation method of nanomaterial modified DMD soft composite |
| CN106626626A (en) * | 2015-11-03 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | High thermal conduction film reinforcement mica tape, preparation method thereof and application |
| CN107808715A (en) * | 2017-09-28 | 2018-03-16 | 上海新益特种电缆有限公司 | A kind of modified complex mineral insulation high-temperature-resistant noninflammability cable and its manufacture method |
| RU2662150C2 (en) * | 2014-02-28 | 2018-07-24 | Сименс Акциенгезелльшафт | Conducting corona shielding paper, in particular for outer corona shielding |
| CN109075643A (en) * | 2016-07-01 | 2018-12-21 | 东芝三菱电机产业系统株式会社 | Insulation system manufacturing method, insulation system and rotating electric machine |
| CN109605850A (en) * | 2018-11-29 | 2019-04-12 | 瑞安复合材料(深圳)有限公司 | A kind of thermoelectric generator Inverter fed motor lower shrinkage flexible insulation composite film material |
| WO2019119782A1 (en) * | 2017-12-22 | 2019-06-27 | 苏州巨峰电气绝缘系统股份有限公司 | Halogen-free flame retardant h-class slot insulating material for nuclear power or transformer, and preparation method therefor |
| CN110349718A (en) * | 2019-07-15 | 2019-10-18 | 瑞安复合材料(深圳)有限公司 | Release insulating composite material in a kind of Inverter fed motor |
| US10506748B2 (en) | 2014-02-28 | 2019-12-10 | Siemens Aktiengesellschaft | Corona shielding system, in particular outer corona shielding system for an electrical machine |
| CN113963842A (en) * | 2021-10-13 | 2022-01-21 | 瑞安复合材料(深圳)有限公司 | High partial discharge insulating material for oil-cooled motor and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10506748B2 (en) | 2014-02-28 | 2019-12-10 | Siemens Aktiengesellschaft | Corona shielding system, in particular outer corona shielding system for an electrical machine |
| RU2662150C2 (en) * | 2014-02-28 | 2018-07-24 | Сименс Акциенгезелльшафт | Conducting corona shielding paper, in particular for outer corona shielding |
| US10736249B2 (en) | 2014-02-28 | 2020-08-04 | Siemens Aktiengesellschaft | Conductive corona shielding paper, in particular for outer corona shielding |
| CN104448705A (en) * | 2014-11-20 | 2015-03-25 | 绵阳润缘电工材料有限公司 | Preparation method of nanomaterial modified DMD soft composite |
| CN106626626A (en) * | 2015-11-03 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | High thermal conduction film reinforcement mica tape, preparation method thereof and application |
| CN106626626B (en) * | 2015-11-03 | 2018-12-18 | 株洲时代电气绝缘有限责任公司 | A kind of high thermal conductivity film reinforcement mica tape and its preparation method and application |
| CN109075643A (en) * | 2016-07-01 | 2018-12-21 | 东芝三菱电机产业系统株式会社 | Insulation system manufacturing method, insulation system and rotating electric machine |
| CN107808715A (en) * | 2017-09-28 | 2018-03-16 | 上海新益特种电缆有限公司 | A kind of modified complex mineral insulation high-temperature-resistant noninflammability cable and its manufacture method |
| CN107808715B (en) * | 2017-09-28 | 2019-04-19 | 上海新益特种电缆有限公司 | A kind of modified complex mineral insulation high-temperature-resistant noninflammability cable and its manufacturing method |
| WO2019119782A1 (en) * | 2017-12-22 | 2019-06-27 | 苏州巨峰电气绝缘系统股份有限公司 | Halogen-free flame retardant h-class slot insulating material for nuclear power or transformer, and preparation method therefor |
| CN109605850A (en) * | 2018-11-29 | 2019-04-12 | 瑞安复合材料(深圳)有限公司 | A kind of thermoelectric generator Inverter fed motor lower shrinkage flexible insulation composite film material |
| CN110349718A (en) * | 2019-07-15 | 2019-10-18 | 瑞安复合材料(深圳)有限公司 | Release insulating composite material in a kind of Inverter fed motor |
| CN110349718B (en) * | 2019-07-15 | 2020-10-13 | 瑞安复合材料(深圳)有限公司 | Corona-resistant intermediate release type insulating composite material |
| CN113963842A (en) * | 2021-10-13 | 2022-01-21 | 瑞安复合材料(深圳)有限公司 | High partial discharge insulating material for oil-cooled motor and preparation method thereof |
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