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Study on Constant Current Corona Triode and Its Applications to Polymer Material Corona Poling

Author: JiangQiang
Tutor: WangZuo
School: Harbin University of Science and Technology
Course: High Voltage and Insulation Technology
Keywords: Corona discharge Constant current corona transistor is Surface potential Poled polymer
CLC: TM83
Type: Master's thesis
Year: 2011
Downloads: 6
Quote: 0
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Abstract


Corona is a self-sustained discharge, when a sufficiently high voltage is applied to the electrode in a non - symmetrical ( for example , needle - plate electrodes ) on occurs. Poling technique compared with other electrostatic field polarization , its biggest advantage is that the polarization does not require deposition electrode than the sandwich structure Tablet polarization is easier to get a higher electric field , and even surface defects the film can be realized polarization, because the breakdown is limited within a narrow range of the sample . Corona triode system is added between the needle - plate electrodes with a metal gate , which not only can adjust the sample surface by the gate voltage potential , and can also make the fall on the surface of the sample charge distribution uniform . Designed a novel corona transistor polarization means , such means may be a constant current polarization of the polymer film . In the corona discharge process , not only can improve the uniformity of charge distribution on the sample , can be detected to the sample surface potential . In order to achieve the corona polarization process of the charging current constant of the feedback system is designed to achieve the adjustment of the gate voltage , via the feedback circuit , so that the surface potential of the gate electrode and the sample is kept constant . Using the constant - current corona device to establish the process of the establishment of low-density polyethylene in the surface potential of the polarization process , and the experimental results were analyzed . The experiment proved that the constant current corona device can facilitate the research charge in the polymer storage and transmission behavior . Electro-optical polymer is cause for great concern because its main or side chain has a strong nonlinear molecular chromophore . In order to obtain a second - order nonlinear effects such as second order multiplier effect , the need of the polymer electric field polarization , it has an asymmetric structure . This article using constant current corona polarization device the EO polymer containing carbazole POLYPHOSPHAZENE were poling , experiments show that this method can be easy to get to the completion of poling time and polarization polarization field strength, the optimization of material nonlinearity can provide a very convenient means of research .

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > High voltage test equipment and measurement techniques
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