CN1242423C - Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor - Google Patents
Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor Download PDFInfo
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- CN1242423C CN1242423C CN 03128898 CN03128898A CN1242423C CN 1242423 C CN1242423 C CN 1242423C CN 03128898 CN03128898 CN 03128898 CN 03128898 A CN03128898 A CN 03128898A CN 1242423 C CN1242423 C CN 1242423C
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- enamelled wire
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Abstract
The present invention relates to a manufacture method for an electromagnetic enamelled wire suitable for a frequency conversion motor, which belongs to the technical field of electromagnetic insulation wire manufacture technology. The method of the present invention mainly comprises that a layer shielding layer which is composed of nanometer inorganic metal oxide and organic insulation material is added in the conventional enamelled wire insulation layer. The method of the present invention is characterized in that the nanometer metal oxide filling is dried and preprocessed; then the nanometer metal oxide filling is added in a system of insulation polymer resin and an organic solvent; a certain organic dispersing agent is added; high-speed homogenization and high-speed sanding processing for the mixture is carried out, and thereby, the nanometer filling is well dispersed in the system of insulation polymer resin and a solvent; composite insulation resin paint containing metal oxide particles is used as a second layer of surface paint to be coated on the naked copper wire, and the electromagnetic enamelled wire suitable for a frequency conversion motor is finally manufactured. The enamelled wire has long service life for resisting pulse surging voltage.
Description
Technical field
The present invention relates to the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor uses, belong to solenoid isolation line fabricating technology field.
Background technology
Frequency control motor has become the important directions of motor development because efficient, accurate, energy-conservation and safeguard advantages such as simple.Yet the insulating material premature damage causes electrical machinery life to descend in the variable-frequency motor.Its reason is that variable-frequency motor uses frequency converter that power supply is provided, because the impedance between frequency converter and motor feeder line and the motor coil winding does not match, produce the pulse surge voltage, it has and exceeds towards characteristics such as voltage, high frequency, the fast speed pulse rates of climb, can produce partial discharge, space charge accumulation and dielectric heating, cause the insulating material quick aging to damage.This has become one of technological difficulties of restriction frequency control motor extensive use.Improve the useful life of insulating material in variable-frequency motor, must improve the anti-variable-frequency pulse surge voltage ability of insulating material.
Utilizing the nano material excellent specific property to improve the anti-variable-frequency pulse surge voltage of variable-frequency motor electromagnetic wire insulating material ability is a kind of effective means.
United States Patent (USP) 4,935,302 propose to add the pulse resistant surge voltage ability that nano inorganic oxide such as chromium oxide, iron oxide and their mixture can improve insulating material in insulating material.United States Patent (USP) 6,190,770B1 have been invented in insulating material and to have been added nanoscale alpha-type aluminum oxide and γ type alumina mixture to improve the pulse resistant surge voltage ability of insulating material.United States Patent (USP) 5,654,095 has invented a kind of pulse resistant surge voltage enamelled wire.This invention is to have added the overcoat that one deck is made up of nano metal inorganic oxide and organic insulating material in conventional magnet wire insulation layer, and wherein the kind of metal inorganic oxide comprises Nano titanium dioxide, aluminium oxide, silica, zinc oxide, iron oxide and various clay.Chinese patent 02111615.6 proposes to use a kind of manufacture method with Nano composite granules of sandwich construction as the pulse resistant surge voltage insulating material of additive.
Because the huge surface activity of nano material, phenomenons such as the moisture absorption, difficult dispersion usually take place in accumulating and application process, directly influence its serviceability, finally influence its function performance in variable-frequency motor electromagnetic wire insulating material at polymer and organic solvent system.In addition in previous methods, conventional nano-metal-oxide filler can not reach good microcosmic in fluoropolymer resin and organic solvent system disperses, as the sand milling means of use, dispersion effect is undesirable, thereby influences the performance of its function.
Summary of the invention
The object of the present invention is to provide a kind of technique manufacturing method of electromagnetism enamelled wire of pulse resistant surge voltage of novelty.Another purpose of the present invention is to overcome the defective that above-mentioned prior art exists, and adopts some necessary technology means, and the nano-metal-oxide filler is evenly disperseed in insulating resin and organic solvent system, to improve the insulation property of electromagnetism enamelled wire.
Above-mentioned purpose of the present invention can reach by following technological means and technical measures:
The manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor of the present invention is used, mainly be in conventional magnet wire insulation layer, to add the overcoat that one deck is made up of nano inorganic metal oxide and organic insulating material, this method is characterised in that, includes following processing step:
A. with the nano inorganic metal oxide as filler, earlier it is carried out the microwave drying preliminary treatment; Nano filling has: titanium oxide, chromium oxide, iron oxide, zirconia, magnesium oxide; Available one or more mixture wherein;
B. Nano filling is joined in the system of insulating polymer resin and organic solvent; The insulating polymer resin is polyamide, polyamidoimide, mylar, can use wherein any; Organic solvent is methyl pyrrolidone, butyl acetate, can use wherein any; The weight ratio of nanometer metal oxide powder and insulating resin is 1: 10;
C. add dispersant again, dispersant is three (dioctyl ester phosphorus acyloxy) isopropyl titanate, two (pyrophosphoric acid dialkoxy ester)-2 hydroxy propanoic acid titanium or anhydrous sorbitol tristearate, can use wherein one or more mixture;
D. said mixture being carried out high speed homogenization handles and the high speed sand milling, high-speed line speed reaches 10 meter per seconds, make Nano filling in insulating resin and dicyandiamide solution, reach uniform microcosmic and disperse, make compound inslation lacquer type organic coating thus with nano-metal-oxide particle;
E. on bare copper wire, be coated with last layer polyester-imide priming paint earlier, and then the above-mentioned compound inslation resin finish paint with nano-metal-oxide particle of coating one deck, finally make the electromagnetism enamelled wire that a kind of suitable variable-frequency motor is used.In the above-mentioned technical process, it is the titanium dioxide of 25nm that the nano-metal-oxide filler can adopt particle diameter, and the pretreated time of microwave drying is 5～50 minutes, and the best is 30 minutes, the addition of dispersant can be 0.05～5% (weight), and the best is 0.5% (weight).
Advantage of the present invention and good effect are:
1) adopts the microwave drying Nano filling, can remove the moisture in the Nano filling faster, more up hill and dale, prevent the particle aggregation phenomenon, obviously improve the additive effect of Nano filling in the insulating material of anti-the frequency conversion.
2) processing method of employing high speed homogenization and high speed sand milling improves the Nano filling dispersion effect greatly.
3) adopt the adding specific dispersant, can effectively prevent the Nano filling secondary agglomeration.
The inventive method technology is simple, and the special-purpose electromagnetism enamelled wire of prepared variable-frequency motor has higher anti-variable-frequency pulse surge voltage ability.
The electromagnetic wire pulse resistant surge voltage life testing method that adopts among the present invention is:
(1). the preparation that twisted wire is right: under the 1364g load, with 8 nodes of two enamelled wire strand systems, twisted wire is 0.4m to length.
(2) life test: to being placed in the insulating box, temperature is 90 ℃ with twisted wire.Twisted wire connects inverter output terminal to two joints of an end, and the other end is vacant.The output frequency that frequency converter provides is 20KHz, and peak pressure is 3KV, and the peak head rise time is 50ns.According to twisted wire to weighing the pulse resistant surge voltage life-span of enamelled wire breakdown time.
Embodiment:
After now embodiments of the invention being described in.
Embodiment one: take by weighing the rutile titanium dioxide that the 10g particle diameter is 25nm, microwave drying 30 minutes, the insulating varnish that adds 400g polyamide-imide resin monomethyl pyrrolidones solvent system then, three (the dioctyl ester phosphorus acyloxy) isopropyl titanate that adds dispersant 2.05 grams again, under 14.4 meter per second linear velocities, handled 20 minutes, again at 10m.s with high-shear homogenizer
-1Linear velocity under high speed sand milling 2 hours, make Nano filling in insulating resin and dicyandiamide solution, reach good microcosmic and disperse, make compound inslation lacquer type organic coating thus.Wherein nano titania filler and insulating resin ratio are 1: 10 (weight).
At diameter is that first coating thickness is the polyester-imide priming paint of 0.06mm on the 1.02mm bare copper wire, coating thickness is that 0.02mm adds the composite polyamide acid imide insulating resin finish paint with titanium dioxide nanoparticle again, finally makes the electromagnetism enamelled wire that a kind of suitable variable-frequency motor is used.
The electromagnetism enamelled wire that present embodiment makes is through the pulse resistant surge voltage life test, and its pulse resistant surge voltage life-span is about 29h.
Embodiment two: take by weighing the rutile titanium dioxide that the 10g particle diameter is 25nm, microwave drying 30 minutes, the insulating varnish that adds 400g polyamide-imide resin-methyl pyrrolidone dicyandiamide solution then adds the anhydrous sorbitol tristearate that dispersant 2.05 restrains, again at 10m.s
-1Linear velocity under high speed sand milling 2 hours, Nano filling is evenly disperseed, make compound inslation lacquer type organic coating thus.Wherein nano titania filler and insulating resin ratio are 1: 10 (weight).
Be prepared into enamelled wire with the method identical with embodiment one, after tested, its pulse resistant surge voltage life-span is about 25h.
Embodiment three: take by weighing the rutile titanium dioxide that the 10g particle diameter is 25nm, after the microwave drying 30 minutes, be incorporated in 400g polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer then, add three (dioctyl ester phosphorus acyloxy) isopropyl titanates of dispersant 1.05 grams and two [pyrophosphoric acid dialkoxy ester]-2 hydroxy propanoic acid titaniums of 1.00 grams again, at 10m.s
-1The high speed sand milling is 2 hours under the linear velocity, and Nano filling is evenly disperseed, and makes compound inslation lacquer type organic coating thus.Wherein nano titania filler and insulating resin ratio are 1: 10 (weight).
With being prepared into wire enamel with embodiment one same procedure, after tested, its pulse resistant surge voltage life-span is about 23h.
Embodiment four: take by weighing the rutile titanium dioxide that the 10g particle diameter is 25nm, after the microwave drying 50 minutes, add 400g polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer, add two [pyrophosphoric acid dialkoxy ester]-2 hydroxy propanoic acid titaniums of dispersant 2.05 grams again, at 10m.s
-1The high speed sand milling is 2 hours under the linear velocity.Be prepared into wire enamel with embodiment one same procedure, after tested, its pulse resistant surge voltage life-span is about 24h.
Embodiment five: take by weighing the rutile titanium dioxide that the 10g particle diameter is 25nm, after the microwave drying 30 minutes, add 400g polyamide-imide resin-methyl pyrrolidone solvent insulating lacquer, add dispersant three (dioctyl ester phosphorus acyloxy) isopropyl titanate again and be respectively 0.21 gram, 2.05 grams, 20.5 grams (doing the test of three different amounts), respectively at 10m.s
-1The high speed sand milling is 2 hours under the linear velocity.Be prepared into wire enamel with embodiment one same procedure, after tested, its pulse resistant surge voltage life-span is about 23 hours, 26 hours, 25 hours.
Reference as a comparison under same experimental condition, does not add the enamelled wire that dispersant finally makes, and its pulse resistant surge voltage life-span is about 18 hours.
As another contrast reference, if do not add the nano titanium oxide filler in the insulation finish paint of coating, the pulse resistant surge voltage life-span of the enamelled wire that then makes only is 7 hours.
Claims (6)
1. the manufacture method of the electromagnetism enamelled wire used of a suitable variable-frequency motor, mainly be in conventional magnet wire insulation layer, to add the overcoat that one deck is made up of nano inorganic metal oxide and organic insulating material, this method is characterised in that this method includes following processing step:
A. with the nano inorganic metal oxide as filler, earlier it is carried out the microwave drying preliminary treatment; Nano filling has: titanium oxide, chromium oxide, iron oxide, zirconia, magnesium oxide; Available one or more mixture wherein;
B. Nano filling is joined in the system of insulating polymer resin and organic solvent; The insulating polymer resin is polyamide, polyamidoimide, mylar, can use wherein any; Organic solvent is methyl pyrrolidone, butyl acetate, can use wherein any; The weight ratio of Nano filling metal-oxide powder and insulating polymer resin is 1: 10;
C. add dispersant again, dispersant is three (dioctyl ester phosphorus acyloxy) isopropyl titanate, two (pyrophosphoric acid dialkoxy ester)-2 hydroxy propanoic acid titanium or anhydrous sorbitol tristearate, can use wherein one or more mixture;
D. said mixture being carried out high speed homogenization handles and the high speed sand milling, high-speed line speed reaches 10 meter per seconds, make Nano filling in insulating resin and organic solvent system, reach uniform microcosmic and disperse, make compound inslation lacquer type organic coating thus with nano-metal-oxide particle;
E. on bare copper wire, be coated with last layer polyester-imide priming paint earlier, and then the above-mentioned compound inslation resin finish paint with nano-metal-oxide particle of coating one deck, finally make the electromagnetism enamelled wire that a kind of suitable variable-frequency motor is used.
2. the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor according to claim 1 is used is characterized in that described nano-metal-oxide filler adopts rutile titanium dioxide; The microwave drying time is 5～50 minutes.
3. the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor according to claim 1 is used is characterized in that described insulating polymer resin and organic solvent system are the insulating varnish systems that adopts polyamide-imide resin and crassitude ketone solvent to constitute.
4. the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor according to claim 1 is used, the addition that it is characterized in that described dispersant is 0.05～5wt%.
5. the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor according to claim 1 is used is characterized in that described high speed homogenization processing and high speed sand milling, and the linear velocity that its high speed homogenization is handled is 14.4 meter per seconds, and the processing time is 20 minutes; The linear velocity of its high speed sand milling is 10 meter per seconds, and the sand milling time is 2 hours.
6. the manufacture method of the electromagnetism enamelled wire that a kind of suitable variable-frequency motor according to claim 1 is used, the diameter that it is characterized in that described bare copper wire is 1.02mm, being coated with a layer thickness earlier on the bare copper wire is the polyester-imide priming paint of 0.06mm, and then be coated with the above-mentioned composite polyamide imide resin insulating finish paint that a layer thickness is 0.02mm with titanium dioxide nanoparticle, wherein the part by weight of titanium dioxide nanoparticle and composite polyamide imide resin is 1: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 03128898 CN1242423C (en) | 2003-05-29 | 2003-05-29 | Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03128898 CN1242423C (en) | 2003-05-29 | 2003-05-29 | Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor |
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| CN1482626A CN1482626A (en) | 2004-03-17 |
| CN1242423C true CN1242423C (en) | 2006-02-15 |
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| CN 03128898 Expired - Fee Related CN1242423C (en) | 2003-05-29 | 2003-05-29 | Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor |
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| CN100394515C (en) * | 2004-04-29 | 2008-06-11 | 上海裕生特种线材有限公司 | Frequency changing electromagnetic wire and manufacturing method thereof |
| CN100440387C (en) * | 2006-09-04 | 2008-12-03 | 山东赛特电工材料有限公司 | Compound paint copper-in-aluminum enameled wire and its manufacturing method |
| CN101540223B (en) * | 2009-04-29 | 2011-03-16 | 天津精达里亚特种漆包线有限公司 | Method for producing DC variable frequency enameled wire |
| CN101789654B (en) * | 2010-02-26 | 2012-12-26 | 株洲敏锐轨道电气有限责任公司 | Insulating method and device of oil pump motor stator of electric locomotive transformer powered up by frequency converter |
| CN101824268B (en) * | 2010-05-07 | 2013-04-17 | 八达电工集团有限公司 | Production method of nano composite modified insulating paint for enameled wire and high-performance nano composite enameled wire |
| CA2803142C (en) * | 2010-06-22 | 2015-09-08 | Anders Bjoerklund | Electrical conductor with surrounding electrical insulation |
| CN102153858B (en) * | 2011-05-12 | 2012-10-10 | 清华大学 | Composite insulating material and preparation method of composite insulating material |
| ES2660542T3 (en) * | 2011-11-16 | 2018-03-22 | Abb Research Ltd. | Electrical insulation system |
| CN103456396A (en) * | 2013-09-05 | 2013-12-18 | 昆山达功电子有限公司 | Insulating varnished wire |
| CN104934114A (en) * | 2015-06-23 | 2015-09-23 | 浙江长城电工科技股份有限公司 | Recombination line for R407C refrigerant air condition compressor |
| CN104900318A (en) * | 2015-06-23 | 2015-09-09 | 浙江长城电工科技股份有限公司 | High efficiency energy saving motor self lubricating enamelled wire |
| CN105355266A (en) * | 2015-11-04 | 2016-02-24 | 铜陵三佳变压器有限责任公司 | Preparation of high-performance flame retardant insulation paper for transformer |
| CN105355269A (en) * | 2015-11-04 | 2016-02-24 | 铜陵三佳变压器有限责任公司 | Composite insulation paper containing tencel fiber used for transformer |
| CN105369671A (en) * | 2015-11-04 | 2016-03-02 | 铜陵三佳变压器有限责任公司 | Preparation of extra-high-voltage composite insulation paper for transformer |
| CN105355268A (en) * | 2015-11-04 | 2016-02-24 | 铜陵三佳变压器有限责任公司 | Aging-resistant insulation paper for transformer |
| CN107384188A (en) * | 2017-07-25 | 2017-11-24 | 芜湖乾凯材料科技有限公司 | A kind of nano-composite insulating of resistance to frequency conversion material and preparation method thereof |
| CN107286840A (en) * | 2017-07-25 | 2017-10-24 | 芜湖乾凯材料科技有限公司 | A kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof |
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Assignee: Zhejiang Hongbo Cables Co., Ltd. Assignor: Shanghai University|Shanghai Shanghui Nano Technology Co., Ltd. Contract fulfillment period: 2006.9.15 to 2013.5.29 contract change Contract record no.: 2008330000704 Denomination of invention: Manufacturing method of electromagnetic enamel-covered wire adaptable for variable frequency motor Granted publication date: 20060215 License type: Exclusive license Record date: 2008.9.27 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2006.9.15 TO 2013.5.29 Name of requester: ZHEJIANG HONGBO CABLE CO., LTD. Effective date: 20080927 |
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