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8 results on '"Guo, Fan"'

5. Coaxial–Conical Transition in Magnetically Insulated Transmission Line

Author

Zou, Wenkang, primary, Wei, Bing, additional, Liu, Laqun, additional, Jiang, Jihao, additional, Guo, Fan, additional, Gong, Boyi, additional, Chen, Lin, additional, Liu, Dagang, additional, Han, Wenhui, additional, Wu, Wei, additional, Liang, Jinhui, additional, Wang, Meng, additional, Feng, Shuping, additional, Xie, Weiping, additional, and Deng, Jianjun, additional

Published
2018
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6. Experimental Study of the Breakdown Characteristics of Polypropylene Films Under Nanosecond Voltage Pulses.

Author

Chen, Zhiqiang, Ji, Shengchang, Jia, Wei, Tang, Junping, Guo, Fan, Li, Junna, and Chen, Weiqing

Subjects
POLYPROPYLENE films, DIELECTRIC breakdown, ELECTRIC potential, ELECTRIC fields, WEIBULL distribution
Abstract

Due to its low-loss and high dielectric strength, polypropylene is widely used as electrical insulation material in pulse capacitors. In order to study its breakdown characteristics for nanosecond voltage pulses, an experimental setup was designed to generate voltage pulses with a 10%–90% rise time of 38 ns and a full width at half maximum of about 90 ns. Tests of the three polypropylene films with thicknesses of 12, 15, and $18~\mu \text{m}$ were performed. In addition, hundreds of nanoseconds pulse and dc voltage were also applied for comparison. The experimental results reveal that most of the breakdown occurs during the front edge of the pulse for tens of nanoseconds pulse, and the breakdown strengths of the three kinds of polypropylene films are almost identical for different applied voltages, which show a weak correlation between the thickness of the dielectric and the breakdown field. The expected breakdown strength of tens of nanoseconds pulse defined in this paper is not significantly higher than the mean value of the hundreds of nanoseconds pulse and the dc condition, suggesting that the breakdown of a thin polypropylene film is mainly determined by the electrical field but not the voltage-time cumulative effect. All these observations strengthen the conclusion that the breakdown of a thin polypropylene film is an intrinsic phenomenon. [ABSTRACT FROM AUTHOR]

Published
2018
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