CN103594201A - Method for preparing electromagnetic wire coated with nano-composite insulating materials - Google Patents
Method for preparing electromagnetic wire coated with nano-composite insulating materials Download PDFInfo
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- CN103594201A CN103594201A CN201310497261.4A CN201310497261A CN103594201A CN 103594201 A CN103594201 A CN 103594201A CN 201310497261 A CN201310497261 A CN 201310497261A CN 103594201 A CN103594201 A CN 103594201A
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Abstract
The invention provides a method for preparing an electromagnetic wire coated with nano-composite insulating materials. The method for preparing the electromagnetic wire comprises the following steps: (a) preparing titanium dioxide powder, (b) preparing modified composite insulating paint, (c) spraying insulating coating materials, and (d) conducting a test on a finished electromagnetic wire. According to the method for preparing the electromagnetic wire coated with the nano-composite insulating materials, the method is simple and reasonable, and the obtained electromagnetic wire is small in film thickness and long in variable frequency resistance service life, and can be used in a variable frequency motor for a long time.
Description
Technical field
The present invention relates to a kind of insulation electromagnetic wire, relate in particular to a kind of preparation method who is coated with the electromagnetic wire of nano-composite insulating material, belong to insulating material technical field.
Background technology
Frequency control motor is efficient, energy-conservation with it, maintenance is easy, be convenient to the advantages such as control automatically, in a lot of fields, is used widely and develops.Yet a lot of motors, after using converter technique, have occurred that the life-span sharply declines and the problem of extensive scaling loss, main cause is that motor stator electromagnetic wire insulating barrier quick aging occurs under partial discharge, space charge accumulation and high temperature and damages.Visible, the performance of electromagnetic wire has directly determined the useful life of variable-frequency motor.
At present, the domestic electromagnetic wire for variable-frequency motor much adopts winding process to be made, their type mainly contains glass fiber covered winding wire, mica tape winding wire, sintering burning group line, dual-polyester glass fiber covered winding wire etc., the film thickness of these electromagnetic wires is thicker, the resistance to frequency conversion life-span is limited, and overall applicability is worth not high.In order to obtain thinner film thickness, electromagnetic wire newly developed adopts coating way to make mostly now, the resistance to frequency conversion performance of insulating material that yet a lot of electromagnetic wire preparation methods in existing technology are complicated, production technology exists defect, select is bad, therefore can not in variable-frequency motor, use for a long time, permanent not to the prolongation in variable-frequency motor useful life.
Summary of the invention
For the demand, the invention provides a kind of preparation method who is coated with the electromagnetic wire of nano-composite insulating material, this preparation method's advantages of simple, the electromagnetic wire making has thinner film thickness and long resistance to frequency conversion life-span, can in variable-frequency motor, use for a long time.
The present invention is a kind of preparation method who is coated with the electromagnetic wire of nano-composite insulating material, described preparation method comprises the steps: a) to prepare titanium dioxide based composite powder, b) prepare modification composite insulating varnish, c) spraying insulating coating material, d) finished product test.
In a preferred embodiment of the present invention, in described step a), the operation of preparing titanium dioxide based composite powder comprises: nano titanium dioxide paste liquid processed, add thermal agitation, filtration washing, oven dry and pulverize.
In a preferred embodiment of the present invention, described nano titanium dioxide paste liquid composition and content are: nano titanium oxide 45～48%, non-nano titanium dioxide 45～48%, surface modifier 4～10%.
In a preferred embodiment of the present invention, in described step b), preparation modification composite insulating varnish comprises the steps: 1) modification insulating material mixture processed; 2) bead high speed sand milling mixture.
In a preferred embodiment of the present invention, composition and the content of described modification insulating material intermixture are: titanium dioxide based composite powder 30～33%, polyamide-imide insulating varnish 55～60%, METHYLPYRROLIDONE solvent 7～15%.
In a preferred embodiment of the present invention, in described step c), spraying insulating coating material comprises the steps: 1) spraying bottom modified poly ester imide resin insulating material; 2) spraying intermediate layer modification composite insulating varnish; 3) spray outer polyamidoimide insulating material.
The present invention has disclosed a kind of preparation method who is coated with the electromagnetic wire of nano-composite insulating material, this preparation method's advantages of simple, and the electromagnetic wire making has thinner film thickness and long resistance to frequency conversion life-span, can in variable-frequency motor, use for a long time.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the preparation method's of embodiment of the present invention coating nano-composite insulating material electromagnetic wire process figure.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Fig. 1 is the preparation method's of embodiment of the present invention coating nano-composite insulating material electromagnetic wire process figure; This preparation method comprises the steps: a) to prepare titanium dioxide based composite powder, b) prepares modification composite insulating varnish, c) spraying insulating coating material, d) finished product test.
Embodiment 1
Concrete preparation method is as follows:
A) prepare titanium dioxide based composite powder, concrete preparation process is: the non-nano titanium dioxide that the nano titanium oxide that is first 25nm by 45% particle diameter and 45% particle diameter are 250nm adds respectively water and makes slurries, and add 10% surface modifier, then be heated to 90 ℃ and stir 2h, carry out again filtering for 3～4 times and washing, finally filter cake is dried at 110 ℃, after drying, pulverizing obtains titanium dioxide based composite powder.
B) prepare modification composite insulating varnish, concrete preparation process is: first the 30% titanium dioxide based composite powder of preparing in step a) is mixed with 55% polyamide-imide insulating varnish, and add 15% METHYLPYRROLIDONE solvent, then adopt the mechanical dispersion technique of bead sand milling to carry out speed lapping to mixture, during grinding, the linear velocity of sand mill impeller is 10m/s, and fineness of grind is 15um, finally obtains new modified composite insulating varnish.Due to sand milling, disperseing is by the extruding force between sand milling medium and shearing force, titanium dioxide based composite powder to be disperseed, and sand milling function makes sand milling medium produce powerful centrifugal force, and then produce strong shear action, therefore titanium dioxide based composite powder is there is to the effect of high dispersive.
C) spraying insulating coating material, spraying insulating coating material comprises the steps: 1) spraying bottom modified poly ester imide resin insulating material; Adopt the method for flame-spraying, on the copper conductor that is 1mm at electromagnetic wire diameter used, spray in advance a layer thickness and be the modified poly ester imide resin insulating material of 0.05mm as bottom.2) spraying intermediate layer modification composite insulating varnish; On coated bottom, adopt modification composite insulating varnish that the method spraying of flame-spraying prepares as intermediate layer, and heated baking modification composite insulating varnish fully removes the METHYLPYRROLIDONE solvent of retaining in composite insulating varnish, the thickness in this intermediate layer is 0.01mm.3) spray outer polyamidoimide insulating material; The polyamidoimide insulating material that the method spraying a layer thickness that adopts flame-spraying on coated intermediate layer is 0.02mm is as skin, to protect intermediate layer and to improve the surface quality of whole electromagnetic wire.
D) finished product test, the electromagnetic wire that this nano modification insulating varnish painting is made is coated with common insulating varnish the electromagnetic wire of making respectively, the nano modification electromagnetic wire that adopts high-speed stirred dispersing technology to prepare carries out resistance to frequency conversion life test comparison, result shows: it is 7h that common insulating varnish is coated with the resistance to frequency conversion life-span of electromagnetic wire of making, and the resistance to frequency conversion life-span that adopts nano modification electromagnetic wire prepared by high-speed stirred dispersing technology is that the resistance to frequency conversion life-span that 10h, nano modification insulating varnish are coated with the electromagnetic wire of making is 58h.Visible, the nano-material modified insulating varnish in the present invention is coated with the resistance to frequency conversion life-span of the electromagnetic wire of making, and more common insulating varnish is coated with the electromagnetic wire of making and improves more than 7 times.
Embodiment 2
Concrete preparation method is as follows:
A) prepare titanium dioxide based composite powder, concrete preparation process is: the non-nano titanium dioxide that the nano titanium oxide that is first 25nm by 48% particle diameter and 48% particle diameter are 250nm adds respectively water and makes slurries, and add 4% surface modifier, then be heated to 95 ℃ and stir 2h, carry out again filtering for 3～4 times and washing, finally filter cake is dried at 110 ℃, after drying, pulverizing obtains titanium dioxide based composite powder.
B) prepare modification composite insulating varnish, concrete preparation process is: first the 33% titanium dioxide based composite powder of preparing in step a) is mixed with 60% polyamide-imide insulating varnish, and add 7% METHYLPYRROLIDONE solvent, then adopt the mechanical dispersion technique of bead sand milling to carry out speed lapping to mixture, during grinding, the linear velocity of sand mill impeller is 10m/s, and fineness of grind is 15um, finally obtains new modified composite insulating varnish.Due to sand milling, disperseing is by the extruding force between sand milling medium and shearing force, titanium dioxide based composite powder to be disperseed, and sand milling function makes sand milling medium produce powerful centrifugal force, and then produce strong shear action, therefore titanium dioxide based composite powder is there is to the effect of high dispersive.
C) spraying insulating coating material, spraying insulating coating material comprises the steps: 1) spraying bottom modified poly ester imide resin insulating material; Adopt the method for flame-spraying, on the copper conductor that is 1mm at electromagnetic wire diameter used, spray in advance a layer thickness and be the modified poly ester imide resin insulating material of 0.05mm as bottom.2) spraying intermediate layer modification composite insulating varnish; On coated bottom, adopt modification composite insulating varnish that the method spraying of flame-spraying prepares as intermediate layer, and heated baking modification composite insulating varnish fully removes the METHYLPYRROLIDONE solvent of retaining in composite insulating varnish, the thickness in this intermediate layer is 0.01mm.3) spray outer polyamidoimide insulating material; The polyamidoimide insulating material that the method spraying a layer thickness that adopts flame-spraying on coated intermediate layer is 0.02mm is as skin, to protect intermediate layer and to improve the surface quality of whole electromagnetic wire.
D) finished product test, the electromagnetic wire that this nano modification insulating varnish painting is made is coated with common insulating varnish the electromagnetic wire of making respectively, the nano modification electromagnetic wire that adopts high-speed stirred dispersing technology to prepare carries out resistance to frequency conversion life test comparison, result shows: it is 7h that common insulating varnish is coated with the resistance to frequency conversion life-span of electromagnetic wire of making, and the resistance to frequency conversion life-span that adopts nano modification electromagnetic wire prepared by high-speed stirred dispersing technology is that the resistance to frequency conversion life-span that 10h, nano modification insulating varnish are coated with the electromagnetic wire of making is 58h.Visible, the nano-material modified insulating varnish in the present invention is coated with the resistance to frequency conversion life-span of the electromagnetic wire of making, and more common insulating varnish is coated with the electromagnetic wire of making and improves more than 7 times.
The present invention has disclosed a kind of preparation method who is coated with the electromagnetic wire of nano-composite insulating material, this preparation method's advantages of simple, and the electromagnetic wire making has thinner film thickness and long resistance to frequency conversion life-span, can in variable-frequency motor, use for a long time.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.
Claims (6)
1. a preparation method who is coated with the electromagnetic wire of nano-composite insulating material, it is characterized in that, described preparation method comprises the steps: a) to prepare titanium dioxide based composite powder, b) prepares modification composite insulating varnish, c) spraying insulating coating material, d) finished product test.
2. the preparation method of the electromagnetic wire of coating nano-composite insulating material according to claim 1, it is characterized in that, in described step a), the operation of preparing titanium dioxide based composite powder comprises: nano titanium dioxide paste liquid processed, add thermal agitation, filtration washing, oven dry and pulverize.
3. the preparation method of the electromagnetic wire of coating nano-composite insulating material according to claim 2, it is characterized in that, described nano titanium dioxide paste liquid composition and content are: nano titanium oxide 45～48%, non-nano titanium dioxide 45～48%, surface modifier 4～10%.
4. the preparation method of the electromagnetic wire of coating nano-composite insulating material according to claim 1, is characterized in that, in described step b), preparation modification composite insulating varnish comprises the steps: 1) modification insulating material mixture processed; 2) bead high speed sand milling mixture.
5. the preparation method of the electromagnetic wire of coating nano-composite insulating material according to claim 4, it is characterized in that, composition and the content of described modification insulating material intermixture are: titanium dioxide based composite powder 30～33%, polyamide-imide insulating varnish 55～60%, METHYLPYRROLIDONE solvent 7～15%.
6. the preparation method of the electromagnetic wire of coating nano-composite insulating material according to claim 1, is characterized in that, in described step c), spraying insulating coating material comprises the steps: 1) spraying bottom modified poly ester imide resin insulating material; 2) spraying intermediate layer modification composite insulating varnish; 3) spray outer polyamidoimide insulating material.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| US9953149B2 (en) | 2014-08-28 | 2018-04-24 | Facetec, Inc. | Facial recognition authentication system including path parameters |
| CN116864218A (en) * | 2023-09-04 | 2023-10-10 | 苏州宇盛电子有限公司 | Preparation process of PEEK insulated electromagnetic wire |
-
2013
- 2013-10-21 CN CN201310497261.4A patent/CN103594201A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9953149B2 (en) | 2014-08-28 | 2018-04-24 | Facetec, Inc. | Facial recognition authentication system including path parameters |
| 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 |
| 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 |
| CN116864218A (en) * | 2023-09-04 | 2023-10-10 | 苏州宇盛电子有限公司 | Preparation process of PEEK insulated electromagnetic wire |
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Application publication date: 20140219 |