CN103149505A - Polyimide film surface charging method - Google Patents
Polyimide film surface charging method Download PDFInfo
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- CN103149505A CN103149505A CN2012104803363A CN201210480336A CN103149505A CN 103149505 A CN103149505 A CN 103149505A CN 2012104803363 A CN2012104803363 A CN 2012104803363A CN 201210480336 A CN201210480336 A CN 201210480336A CN 103149505 A CN103149505 A CN 103149505A
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Abstract
The invention relates to a polyimide film surface charging method. The polyimide film surface charging method comprises the steps of controlling a system to enable humidity to be adjusted to be 40 percent and temperature to be adjusted to be 23 DEG C through adjusting humidity and temperature control system of the interior of a semi-closed container, placing an experimental sample on a tray, enabling the perpendicular distance between a pinpoint of a pin electrode and the sample to be 3mm, wherein the pinpoint is located right above the center of the sample, closing the container and pressurizing the pin electrode. An applied power source comprises high pressure alternating voltage, positive and negative direct voltage and impulse voltage, so that an accumulation process and a dissipation process of positive charges, negative charges and impulse voltage on the surface of the sample at various pressurizing times can be respectively researched. The polyimide (PI) film surface charging method has certain universality and is simple in operation and not easily influenced by changes of external environment.
Description
Affiliated technical field
The present invention relates to a kind of research of Kapton surface charging method.
Background technology
In recent years, the usable range of variable-frequency motor was more and more wider.Efficiently, energy-conservation, be easy to the advantage such as control and make variable-frequency motor in metallurgy, lifting, locomotive traction all fields, alternative DC speed regulation trend be arranged greatly, also electrical machine insulation is had higher requirement simultaneously.In the electrical machine insulation technical field, organic film kind commonly used is a lot, mainly contains polyester (polyethylene terephthalate) film, polypropylene film, polyvinyl chloride film, polyethylene film, plasticon, Kapton etc.Wherein, polyimide (PI) film becomes the first-selection of organic film in the electric insulation technical field due to its remarkable dielectric properties, heat resistance, mechanical property.The widespread use of PI film has reduced thickness of insulating layer, has improved the heat dispersion of insulation system, but about the research of the corona-resistance property of PI film, breakthrough progress is not arranged always, becomes a major reason of restriction PI film development.
Kapton as a kind of special engineered material, is the heat-resistant resin of developing under the U.S. and USSR (Union of Soviet Socialist Republics) arms race and space development in the sixties in 20th century, is also to be acknowledged as the most successful a kind of resin.Generally contain phenyl ring and imide ring structure on the PI molecular backbone, due to electron polarization and crystallinity, causing PI to exist between stronger strand acts on, cause that the PI strand is tightly packed, thereby cause the obvious water absorptivity of PI and thermal expansivity, cause PI film corona resistance very weak, this has limited its application under high temperature and accurate state.For satisfying the wide market demands of variable-frequency motor, the electromagnetic wire industry must be made great efforts exploitation and be adapted to high-frequency pulse voltage, the electromagnetic wire of anti-corona.For the high-pressure frequency-conversion motor, must develop the Kapton (PI film) of anti-corona, make winding wire with it, to solve the not weakness of anti-corona of common PI film.
The raising of electric property becomes a significant problem of restriction PI film development.The expert has carried out research extensively and profoundly to the mechanism of the film-insulated inefficacy of PI both at home and abroad, cause the principal element of insulation breakdown when mainly thinking shelf depreciation, be accumulated at and execute outside under electric field action by free charge the role who is playing the part of outbalance in the surface charge failure of insulation process that the solids-gases interface forms.Bellomo etc. during life-span of polyimide, find that the life-span of insulating material in variable-frequency motor is mainly controlled by shelf depreciation under the research square-wave voltage.The surface-discharge of PI film under the square-wave pulse that Kimura.Ken has adopted current sensor measurement thinks that the surface charge of Kapton accumulation is to the shelf depreciation important.Therefore the surface charge method for dissipating that effectively improves Kapton can improve its anti-power.The invention provides a kind of simply, have the Kapton surface charging method of universality, to studying better PI film surface electric charge accumulative total, dissipation trend, seek to improve PI film electric durability can effective ways.
Purpose
The object of the present invention is to provide the charged method on a kind of Kapton surface.
Technical scheme
The technical solution adopted for the present invention to solve the technical problems is: by certain measure, humidity, the temperature of semienclosed container inside is adjusted to respectively 40% and 23 ℃, then laboratory sample is placed on pallet, and to make the needle point of pin electrode and the vertical range of sample be 3mm, and needle point be positioned at the sample center directly over, then container closure, pin electrode is pressurizeed.It is the high pressure power frequency AC that institute adds power supply, simultaneously, adds diode in circuit, by changing the connection of diode, can study respectively positive charge, negative charge accumulative total, the evanishment at sample surfaces in different pressing times.This kind PI film surface charged method has certain universality, and simple to operate, is not subject to the impact of external environment conversion.
Beneficial effect
Advantage of the present invention and beneficial effect:
1. PI film surface charged method provided by the present invention is simple, have universality, and equipment is simple, easily builds experiment table and tests.
2. the anti-extraneous factor interference performance of PI film surface charged method provided by the present invention is strong, need not to be limited by the variation of external environment condition;
3. in PI film surface charged method measuring process provided by the present invention, manually-operated reduces, and experimental data is directly perceived, accurate, has more cogency.
Description of drawings
Fig. 1 is the simple model of Kapton surface charging method in the present invention;
Fig. 2 is a whole set of experimental provision that mates with Kapton surface charging method in the present invention.
Preferred forms
Case study on implementation 1: humidity regulation is carried out in semienclosed container inside by drying agent, making the interior humidity of container is 40%, as on pallet, and to make the vertical range of pin electrode needle point and sample be 3mm with test specimen, and the pin electrode needle point is positioned at directly over the sample center.Then take out drying agent, closed container, pin electrode is pressurizeed, make pin electrode carry out corona discharge to sample, the corona discharge time is respectively 5min, 10min, 15min, after pressurization is completed, under the pallet that the interior kinematic train of container will be loaded with sample automatically moves to probe, (probe also is 3mm with the vertical range of sample, and be positioned at directly over the sample center), measure the sample center quantity of electric charge by electric capacity electrostatic agent TREK347, and data are gathered.
Claims (1)
1. patent of the present invention relates to a kind of research of Kapton surface charging method, he comprises that the temperature and humidity control system by regulating semienclosed container inside is adjusted to respectively 40% and 23 ℃ with humidity, temperature, then laboratory sample is placed on pallet, and to make the needle point of pin electrode and the vertical range of sample be 3mm, and needle point be positioned at the sample center directly over, then container closure, pin electrode is pressurizeed.Institute adds power supply and is related to High AC voltage, positive negative dc voltage, pulse voltage, can study respectively positive charge, negative charge meter pulse voltage accumulative total, the evanishment at sample surfaces in different pressing times.This kind PI film surface charged method has certain universality, and simple to operate, is not subject to the impact of external environment conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104803363A CN103149505A (en) | 2012-11-22 | 2012-11-22 | Polyimide film surface charging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104803363A CN103149505A (en) | 2012-11-22 | 2012-11-22 | Polyimide film surface charging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103149505A true CN103149505A (en) | 2013-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104803363A Pending CN103149505A (en) | 2012-11-22 | 2012-11-22 | Polyimide film surface charging method |
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| CN (1) | CN103149505A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616619A (en) * | 2013-11-19 | 2014-03-05 | 北京卫星环境工程研究所 | Polyimide film insulation inspection tool on SADA support |
| CN106018534A (en) * | 2016-06-20 | 2016-10-12 | 南方电网科学研究院有限责任公司 | Polyimide film surface charge characteristic analysis method |
| CN108445310A (en) * | 2018-06-05 | 2018-08-24 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device and method |
-
2012
- 2012-11-22 CN CN2012104803363A patent/CN103149505A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 张纪伟: "《环氧/二氧化钛纳米复合材料的表面电荷衰减特性》", 《第十三届全国工程电介质学术会议》 * |
| 朱晓辉: "《交联温度对XLPE累积电荷衰减特性的影响》", 《高电压技术》 * |
| 雷清泉: "《电晕老化前后100HN和100CR聚酰亚胺薄膜的》", 《中国电机工程学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616619A (en) * | 2013-11-19 | 2014-03-05 | 北京卫星环境工程研究所 | Polyimide film insulation inspection tool on SADA support |
| CN103616619B (en) * | 2013-11-19 | 2016-12-07 | 北京卫星环境工程研究所 | Spacecraft solar array driving means support polyimide (PI) film insulation inspection tool |
| CN106018534A (en) * | 2016-06-20 | 2016-10-12 | 南方电网科学研究院有限责任公司 | Polyimide film surface charge characteristic analysis method |
| CN106018534B (en) * | 2016-06-20 | 2018-11-30 | 南方电网科学研究院有限责任公司 | Kapton surface charge properties analysis method |
| CN108445310A (en) * | 2018-06-05 | 2018-08-24 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device and method |
| CN108445310B (en) * | 2018-06-05 | 2023-10-27 | 沈阳工业大学 | Device and method for measuring surface charge and trap energy level characteristics of polymer |
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Application publication date: 20130612 |