CN103128039A - Coating method of winding amorphous iron core insulating coating - Google Patents
Coating method of winding amorphous iron core insulating coating Download PDFInfo
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- CN103128039A CN103128039A CN2011103941836A CN201110394183A CN103128039A CN 103128039 A CN103128039 A CN 103128039A CN 2011103941836 A CN2011103941836 A CN 2011103941836A CN 201110394183 A CN201110394183 A CN 201110394183A CN 103128039 A CN103128039 A CN 103128039A
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- iron core
- amorphous iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 238000000576 coating method Methods 0.000 title claims abstract description 80
- 239000011248 coating agent Substances 0.000 title claims abstract description 53
- 238000004804 winding Methods 0.000 title abstract 2
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 21
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000005470 impregnation Methods 0.000 claims abstract description 8
- 239000004593 Epoxy Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- 230000001680 brushing effect Effects 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 208000028804 PERCHING syndrome Diseases 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 229910008423 Si—B Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 229920006334 epoxy coating Polymers 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002178 crystalline material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to a coating method of a winding amorphous iron core insulating coating. The coating method comprises a first step that a whole amorphous iron core is arranged in epoxy glue to conduct vacuum impregnation, a second step that the surface of the amorphous iron core is coated with epoxy resin, and a third step of heating and solidifying after the amorphous iron core is coated with the modified epoxy glue coating. Gaps between amorphous strips are sealed and have certain strength after the epoxy glue impregnation, the coating is neat in surface and uniform in thickness, vibration and noises of the iron core are reduced, and integrated installation is convenient. The coating is thinner than general coating technique and solidifying time is shortened. The epoxy glue enables solidifying contraction percentage to be low, the epoxy glue coating has good adhesiveness and elasticity and has little stress to the iron core, and the coating has little influence on initial magnet conductivity and inductance of the amorphous iron core. The amorphous iron core dealt with the coating method can greatly reduce no-load loss.
Description
Technical field
The present invention relates to a kind of coating method of takeup type amorphous iron core insulating coating, be mainly used in the manufacture process of amorphous iron core in the single-phase and three-phase filter reactor in amorphous transformer, inverter.
Background technology
The amorphous and nanocrystalline soft magnetic alloy material has the advantage of silicon steel and soft magnetic ferrite concurrently, have higher saturation induction density and extremely low iron loss, thereby alternative silicon steel and part soft magnetic ferrite be used for the core material of various medium-high frequency power electronic equipments, plays the effect that reduces device volume, reduces equipment energy consumption.Be used for transformer as be prepared into iron core with non-crystalline material, energy-saving effect is very remarkable, and the open circuit loss of the amorphous transformer of same capability is only 1/4th of silicon steel transformer.In wind-powered electricity generation and solar power generation grid-connecting equipment, inverter and current transformer are indispensable equipment, and the inside comprises the devices such as transformer, filter inductor.Because novel amorphous iron core has the advantages such as cost is lower, loss is low, temperature coefficient is little, the silicon sheet core that is used for alternative inverter has very large market prospects, and energy-saving effect is remarkable.
Non-crystalline material is the new material that utilizes flash set technology to make, amorphous iron core is to be formed by some layers of amorphous band coiling and molding or stacked extrusion modling, this lamination is easily loose, easily produce vibration and noise, simultaneously, the magnetostriction degree of non-crystaline amorphous metal is higher by approximately 10% than silicon steel sheet, and the iron core noise that also causes it to reel is larger., thin thickness high due to amorphous band hardness, have larger fragility in addition, and it easily produces some fragments in producing assembling and finished product use procedure, and these fragments can produce larger impact to performance and the reliability of product.
Traditional insulating coating coating method generally adopts at iron core external coating epoxy resin, brushing-stroke velocity is slow, the surface is difficult for smooth, coating layer thickness is inhomogeneous, and coating is thicker, and the method is used for amorphous iron core, can cause the filling between amorphous band closely knit not, and amorphous band is easily loose, easily produces vibration and the larger problems such as noise, affects the iron core performance.
Summary of the invention
Purpose of the present invention provides a kind of coating method of takeup type amorphous iron core insulating coating exactly for the problems referred to above, adopt the method to increase the activity coefficient of iron core, has reduced vibration and the noise of iron core, facilitates integral installation.
The technical scheme that the present invention adopts in order to reach the goal is:
The coating method of a kind of takeup type amorphous iron core of the present invention insulating coating comprises the following steps:
A) whole amorphous iron core is placed in the epoxy glue vacuum impregnation;
B) amorphous iron core external coating epoxy resin;
C) being heating and curing after amorphous iron core brushing modified epoxy gel coating.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, before whole amorphous iron core is placed in epoxy glue vacuum impregnation step, carry out following preparation:
First amorphous iron core is heat-treated, apply transverse magnetic field in stove, and kept 0.5-1.5 hour under 250-400 ℃ of heat treatment temperature, after heat treatment, the amorphous iron core temperature is down to 85～110 ℃, and removes dust and the chip on amorphous iron core surface with equipment such as hairbrush or nylon brusses.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the whole amorphous iron core of described step a is placed in the vacuum-impregnated concrete grammar of epoxy glue and is:
First used for epoxy resin alcohol is diluted by 1: 2～4 weight ratio, make epoxy glue, in the described epoxy glue of whole amorphous iron core, flooded under vacuum condition 10～15 minutes, this moment is owing to being negative pressure, being conducive to epoxy resin fully penetrates between the amorphous band gap, the amorphous iron core surface forms very thin one deck epoxy coating, as more smooth in strip surface, the glue soakage is relatively less, and the iron core that dipping is good carries out dry solidification, due to the volatilization of spirit solvent, got final product in dry solidification 10-20 minute, the weight of amorphous iron core increases by 0.05%～2%.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the concrete grammar of described step b amorphous iron core external coating epoxy resin is:
First with epoxy resin with curing agent by 3～4: 1 weight ratio is mixed, and makes epoxy insulation coating, and at amorphous iron core external coating epoxy insulation coating, the epoxy insulation paint coatings thickness of amorphous iron core external coating is 0.1mm～0.3mm.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, the concrete grammar that is heating and curing in described step c is:
Send in baking oven being coated with the amorphous iron core that brushes, solidification temperature is 80 ℃～150 ℃, and be 30～100 minutes hardening time;
The amorphous iron core that is cured goes out after baking oven with have gentle hands light touches edge, and whether check solidifies, and as also not parching, sends back to curing oven 5-10 minute again.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, described amorphous iron core is heating and curing after step, should carry out the amorphous iron core cleaning, and concrete grammar is:
Check whether the amorphous iron core surface has bubble, if there is bubble, need cuts and with epoxy insulation coating, bubble place envelope be put down, sealed afterwards, then with perching knife finishing amorphous iron core edge.
At last the iron core that is cured is cut, rectangle iron core cuts in the middle part, becomes the C type, and port polishes and gets final product.The iron space factor that coating curing is good reaches more than 0.8.
The coating method of above-mentioned a kind of takeup type amorphous iron core insulating coating, wherein, described amorphous iron core is rectangle or annular, the amorphous iron core material therefor comprises the series such as Fe-Si-B, Fe-Cu-Nb-Si-B, Fe-Zr-B, Fe-Co-Nb-Si-B, and the thickness of amorphous and nanocrystalline strip is 20-30 μ m.
The inventive method is compared with existing method, has the following advantages:
1. in employing the inventive method, after the epoxy glue dipping, the gap between amorphous band is sealed, and has certain intensity, and formed coating surface is smooth, even thickness;
2. the coating due to brushing is thinner than general brushing technique, has shortened hardening time;
3. iron core is after vacuum-latexed, and amorphous band is fully filled curing by epoxy glue between the gap, has increased the activity coefficient of iron core, has reduced vibration and the noise of iron core, facilitates integral installation;
4. the epoxy glue that adopts of the present invention, make cure shrinkage lower, and the epoxy glue type coating that forms has cohesive force and elasticity preferably, and the stress that iron core is produced is very little, and its initial permeability and inductive impact are less after gluing;
5. adopt the amorphous iron core after this inventive method is processed greatly to reduce open circuit loss.
The specific embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment 1
The amorphous state Fe78Si9B13 alloy strip steel rolled stock that 50mm is wide is wound into rectangle volume iron core, folded thick 20mm, the wide 25mm of interior window, the high 82mm of interior window, gross weight 1.7kg.Heat treated amorphous iron core is carried out cooling, and remove amorphous iron core surface dirt and chip with equipment such as hairbrush or nylon brusses.After complete iron core temperature to be heated drops to 100 ℃, in homemade vacuum-latexed equipment, whole iron core is carried out whole impregnation, epoxy glue used is that used for epoxy resin alcohol dilutes by the weight ratio of 1: 2 and makes.Flood after 10 minutes and take out, the very thin one deck epoxy coating of iron core this moment surface formation.Dipping iron core dry solidification well 10 minutes, iron core weight is 1.84kg.Carry out the integral body brushing on amorphous iron core surface, epoxy resin adopts T-620H-1 (single-component epoxy resin adhesive), mixes by the weight ratio of 3: 1 with curing agent, makes epoxy insulation coating, and the coating layer thickness on amorphous iron core surface is 0.2mm.Solidified 60 minutes under 130 ℃.Curing of coatings is well rear with perching knife finishing iron core edge, then rectangle iron core is cut in the middle part, becomes the C type, and port polishes.The iron space factor that coating curing is good reaches 0.78.
Embodiment 2
The amorphous state Fe78Si9B13 alloy strip steel rolled stock that 70mm is wide is wound into E shape iron core, iron core weight 24KG, size (window 130 * 240mm, housing 230 * 340 * 70mm).Heat treated iron core is carried out cooling, and remove amorphous iron core surface dirt and chip with equipment such as hairbrush or nylon brusses.After complete iron core temperature to be heated drops to 100 ℃, in homemade vacuum-latexed equipment, whole iron core is carried out whole impregnation, epoxy glue used is that used for epoxy resin alcohol dilutes by the weight ratio of 1: 4 and makes.Take out the very thin one deck epoxy coating of iron core this moment surface formation after dipping 15min.The iron core dry solidification 15min that dipping is good, iron core weight is 24.36kg.Carry out the surface integral brushing with epoxy insulation coating, epoxy insulation coating is mixed by the weight ratio of 4: 1 with curing agent by epoxy resin and makes, and the epoxy insulation paint coatings thickness of brushing is 0.3mm.Solidify 80min under 120 ℃.Curing of coatings is well rear with perching knife finishing iron core edge, then E shape iron core is cut in the middle part, and port polishes.The iron space factor that coating curing is good reaches 0.8.
Above embodiment is only for explanation the present invention's, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (7)
1. the coating method of a takeup type amorphous iron core insulating coating, is characterized in that, comprises the following steps:
A) whole amorphous iron core is placed in the epoxy glue vacuum impregnation;
B) amorphous iron core external coating epoxy resin;
C) being heating and curing after amorphous iron core brushing modified epoxy gel coating.
2. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, before whole amorphous iron core is placed in epoxy glue vacuum impregnation step, carries out following preparation:
First amorphous iron core is heat-treated, apply transverse magnetic field in stove, and kept 0.5-1.5 hour under 250-400 ℃ of heat treatment temperature, after heat treatment, the amorphous iron core temperature is down to 85～110 ℃, and removes dust and the chip on amorphous iron core surface.
3. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, the whole amorphous iron core of described step a is placed in the vacuum-impregnated concrete grammar of epoxy glue and is:
First used for epoxy resin alcohol is diluted by 1: 2～4 weight ratio, make epoxy glue, in the described epoxy glue of whole amorphous iron core, flooded under vacuum condition 10～15 minutes, after dipping, dry solidification 10-20 minute, the weight of amorphous iron core increased by 0.05%～2%.
4. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, the concrete grammar of described step b amorphous iron core external coating epoxy resin is:
First with epoxy resin with curing agent by 3～4: 1 weight ratio is mixed, and makes epoxy insulation coating, and at amorphous iron core external coating epoxy insulation coating, the epoxy insulation paint coatings thickness of amorphous iron core external coating is 0.1mm～0.3mm.
5. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, the concrete grammar that is heating and curing in described step c is:
Send in baking oven being coated with the amorphous iron core that brushes, solidification temperature is 80 ℃～150 ℃, and be 30～100 minutes hardening time;
The amorphous iron core that is cured goes out after baking oven with have gentle hands light touches edge, and whether check solidifies, and as also not parching, sends back to curing oven 5-10 minute again.
6. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 5, is characterized in that, described amorphous iron core is heating and curing after step, should carry out the amorphous iron core cleaning, and concrete grammar is:
Check whether the amorphous iron core surface has bubble, if there is bubble, need cuts and with epoxy insulation coating, bubble place envelope be put down, sealed afterwards, then with perching knife finishing amorphous iron core edge.
7. the coating method of a kind of takeup type amorphous iron core insulating coating as claimed in claim 1, is characterized in that, described amorphous iron core is rectangle or annular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110394183.6A CN103128039B (en) | 2011-12-01 | 2011-12-01 | Coating method of winding amorphous iron core insulating coating |
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| CN201110394183.6A CN103128039B (en) | 2011-12-01 | 2011-12-01 | Coating method of winding amorphous iron core insulating coating |
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| CN103128039A true CN103128039A (en) | 2013-06-05 |
| CN103128039B CN103128039B (en) | 2014-11-05 |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474226A (en) * | 2013-09-06 | 2013-12-25 | 合肥鑫伟电力设备有限公司 | Iron core painting process |
| CN104240933A (en) * | 2014-06-25 | 2014-12-24 | 上海置信电气非晶有限公司 | Gluing method for amorphous alloy three-dimensional wound iron core |
| CN104361987A (en) * | 2014-11-06 | 2015-02-18 | 宁波奥克斯高科技有限公司 | Coating method of oil-immersed amorphous alloy transformer core |
| CN105097162A (en) * | 2014-05-04 | 2015-11-25 | 惠州铂科磁材有限公司 | Technology method for soft magnetic product immersion |
| CN105623462A (en) * | 2014-11-06 | 2016-06-01 | 山东海源光电科技有限公司 | Epoxy resin spray-coating method and special-purpose epoxy resin spray-coating liquid thereof |
| CN105761922A (en) * | 2016-02-19 | 2016-07-13 | 南昌大学 | Magnetic powder core mold material design and preparation technology |
| CN105788825A (en) * | 2016-05-17 | 2016-07-20 | 江阴市晶磁电子有限公司 | Impregnation solidification type amorphous iron core and preparation method thereof |
| CN106057460A (en) * | 2016-05-12 | 2016-10-26 | 横店集团东磁股份有限公司 | Preparation method for gas atomized metal magnetic powder core |
| CN106128745A (en) * | 2016-08-18 | 2016-11-16 | 中车株洲电机有限公司 | A kind of insulation against ground processing method unshakable in one's determination and Nomex mixing bonding agent |
| CN106128746A (en) * | 2016-08-19 | 2016-11-16 | 浙江艾默可科技有限公司 | A kind of curing reducing amorphous iron core internal stress |
| CN106158338A (en) * | 2015-04-20 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of manufacturing method of amorphous alloy core with ultra-thin epoxy coating |
| CN112430446A (en) * | 2020-11-24 | 2021-03-02 | 深圳大学 | A kind of adhesive for bonding and insulating amorphous strip and its preparation method and use method |
| CN113035546A (en) * | 2021-03-01 | 2021-06-25 | 合肥合美电子技术有限公司 | Permalloy iron core dipping and curing process for CT electricity taking |
| CN113125918A (en) * | 2021-04-14 | 2021-07-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Preparation method of sample wafer for testing insulation performance of capacitor core of epoxy glue impregnated paper sleeve |
| CN113399234A (en) * | 2021-05-25 | 2021-09-17 | 中国科学院高能物理研究所 | Epoxy spraying insulation treatment method for superconducting undulator framework |
| CN114628146A (en) * | 2022-03-15 | 2022-06-14 | 广信新材料科技(长沙)有限责任公司 | Process for manufacturing insulating material (coiled insulating end ring) of transformer |
| CN114961401A (en) * | 2022-06-16 | 2022-08-30 | 河南永科智能电力设备有限公司 | Composite insulation type telegraph pole cross arm and method for manufacturing telegraph pole cross arm |
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| GB2139008A (en) * | 1983-04-25 | 1984-10-31 | Hitachi Metals Ltd | Amorphous wound core |
| CN1979698A (en) * | 2006-11-06 | 2007-06-13 | 南昌大学 | Method for making novel ferrite/iron-base composite material soft magnetic-powder core |
| CN101840777A (en) * | 2010-05-31 | 2010-09-22 | 佛山市中研非晶科技股份有限公司 | Paint dipping method for bonding amorphous C type magnetic core by pure resin and special equipment |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474226A (en) * | 2013-09-06 | 2013-12-25 | 合肥鑫伟电力设备有限公司 | Iron core painting process |
| CN105097162A (en) * | 2014-05-04 | 2015-11-25 | 惠州铂科磁材有限公司 | Technology method for soft magnetic product immersion |
| CN104240933A (en) * | 2014-06-25 | 2014-12-24 | 上海置信电气非晶有限公司 | Gluing method for amorphous alloy three-dimensional wound iron core |
| CN104361987A (en) * | 2014-11-06 | 2015-02-18 | 宁波奥克斯高科技有限公司 | Coating method of oil-immersed amorphous alloy transformer core |
| CN105623462A (en) * | 2014-11-06 | 2016-06-01 | 山东海源光电科技有限公司 | Epoxy resin spray-coating method and special-purpose epoxy resin spray-coating liquid thereof |
| CN106158338A (en) * | 2015-04-20 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of manufacturing method of amorphous alloy core with ultra-thin epoxy coating |
| CN106158338B (en) * | 2015-04-20 | 2018-07-24 | 上海飞晶电气股份有限公司 | A kind of manufacturing method of amorphous alloy core with ultra-thin epoxy coating |
| CN105761922A (en) * | 2016-02-19 | 2016-07-13 | 南昌大学 | Magnetic powder core mold material design and preparation technology |
| CN106057460A (en) * | 2016-05-12 | 2016-10-26 | 横店集团东磁股份有限公司 | Preparation method for gas atomized metal magnetic powder core |
| CN105788825A (en) * | 2016-05-17 | 2016-07-20 | 江阴市晶磁电子有限公司 | Impregnation solidification type amorphous iron core and preparation method thereof |
| CN106128745A (en) * | 2016-08-18 | 2016-11-16 | 中车株洲电机有限公司 | A kind of insulation against ground processing method unshakable in one's determination and Nomex mixing bonding agent |
| CN106128746A (en) * | 2016-08-19 | 2016-11-16 | 浙江艾默可科技有限公司 | A kind of curing reducing amorphous iron core internal stress |
| CN106128746B (en) * | 2016-08-19 | 2018-11-27 | 浙江艾默可科技有限公司 | A kind of curing method reducing amorphous iron core internal stress |
| CN112430446A (en) * | 2020-11-24 | 2021-03-02 | 深圳大学 | A kind of adhesive for bonding and insulating amorphous strip and its preparation method and use method |
| CN113035546A (en) * | 2021-03-01 | 2021-06-25 | 合肥合美电子技术有限公司 | Permalloy iron core dipping and curing process for CT electricity taking |
| CN113125918A (en) * | 2021-04-14 | 2021-07-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Preparation method of sample wafer for testing insulation performance of capacitor core of epoxy glue impregnated paper sleeve |
| CN113125918B (en) * | 2021-04-14 | 2022-05-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Preparation method of samples for insulation performance test of epoxy adhesive-impregnated paper bushing capacitor core |
| CN113399234A (en) * | 2021-05-25 | 2021-09-17 | 中国科学院高能物理研究所 | Epoxy spraying insulation treatment method for superconducting undulator framework |
| CN114628146A (en) * | 2022-03-15 | 2022-06-14 | 广信新材料科技(长沙)有限责任公司 | Process for manufacturing insulating material (coiled insulating end ring) of transformer |
| CN114961401A (en) * | 2022-06-16 | 2022-08-30 | 河南永科智能电力设备有限公司 | Composite insulation type telegraph pole cross arm and method for manufacturing telegraph pole cross arm |
| CN114961401B (en) * | 2022-06-16 | 2023-08-18 | 河南永科智能电力设备有限公司 | Composite insulation type telegraph pole cross arm and manufacturing method thereof |
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| CN103128039B (en) | 2014-11-05 |
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