Role of the voltage zero-crossing in the growth of water trees - Effect of superposition method of a high-frequency voltage and a low-frequency voltage

Y. Ohki, H. Ishikawa, G. Morita, T. Konishi, Y. Nakamichi, M. Tanimoto

研究成果: Conference contribution

7 被引用数 (Scopus)

抄録

The authors have examined the effects of superposition of a low-frequency ac voltage and a high-frequency ac voltage on the growth of water trees in polyethylene, and have made it clear that the number of voltage zero-crossings is a decisive factor of water tree growth. In the present research, a short-duration high-frequency (2 kHz) voltage was superposed repeatedly onto a continuously applied low-frequency (0.5, 1.0, 3.0 or 5.0 Hz) voltage in synchronous with the low-frequency voltage either at its positive and negative maxima or at each zero-crossing point. By applying such superposed voltages to a low-density polyethylene sheet with a water needle electrode and a counter plane electrode, the length of a grown water tree was evaluated. As a result, it has become clear that the water tree length is longer when the high-frequency voltage is superposed at each zero-crossing point of the low-frequency voltage. This result supports the above-mentioned assumption that the number of voltage zero-crossings plays a significant role in the growth of water trees.

本文言語English
ホスト出版物のタイトルProceedings of 2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008
出版社IEEE Computer Society
ページ328-331
ページ数4
ISBN(印刷版)9781424416219
DOI
出版ステータスPublished - 2008
イベント2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008 - Beijing, China
継続期間: 2008 4 212008 4 24

出版物シリーズ

名前Proceedings of 2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008

Conference

Conference2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008
国/地域China
CityBeijing
Period08/4/2108/4/24

ASJC Scopus subject areas

  • 産業および生産工学
  • 安全性、リスク、信頼性、品質管理

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