DocumentCode
3612706
Title
Degradation mechanism of A12O3 nano filled polyimide film due to surface discharge under square impulse voltage
Author
Akram, Shakeel ; Guoqiang Gao ; Yang Liu ; Jian Zhu ; Guangning Wu ; Kai Zhou
Author_Institution
Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
Volume
22
Issue
6
fYear
2015
fDate
12/1/2015 12:00:00 AM
Firstpage
3341
Lastpage
3349
Abstract
Failure mechanism due to corona aging and characteristics of PD (partial discharge) on nano doped PI (polyimide) film are investigated under bipolar impulse voltage. Chemical characterization of material is analyzed through SEM (scanning electron microscope) and FTIR (Fourier transform infrared spectroscopy). The results show that failure of specimens is mainly caused by surface discharge which could be suppressed by the addition of nano particles. The Al2O3 nano fillers improved the corona resistant property of PI film significantly. The corona resistant lifetime of PI/Al2O3 sample is six times longer than that of pure PI. Furthermore, to know the frequency and rise time effect of surface discharge on specimens, mean discharge quantity of PD under impulse voltage is measured. Increase of pulse frequency leads to enhancement of PD activity, whereas increase of rise time, weakens PD activity. The discovered effects of profound significance will help on improving dielectric properties of nanocomposites towards various applications.
Keywords
Fourier transform infrared spectra; alumina; corona; doping; failure analysis; filler metals; nanocomposites; nanoparticles; partial discharges; polymer films; scanning electron microscopy; Al2O3; FTIR; Fourier transform infrared spectroscopy; PD characteristics; SEM; bipolar impulse voltage; corona aging; corona resistant lifetime; corona resistant property; failure mechanism; material chemical characterization; nanocomposite dielectric properties improvement; nanodoped PI film; nanofilled polyimide film degradation mechanism; nanofiller; nanoparticle; partial discharge characteristics; scanning electron microscope; square impulse voltage; surface discharge; Aging; Corona; Discharges (electric); Films; Partial discharges; Resistance; Surface discharges; Square wave; corona resistance; partial discharges; polyimide film; surface discharges;
fLanguage
English
Journal_Title
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher
ieee
ISSN
1070-9878
Type
jour
DOI
10.1109/TDEI.2015.005059
Filename
7367530
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