抄録
Water tree characteristics have been investigated for low-density polyethylene by applying power-frequency ac voltages with high-frequency components, which are simulated output voltages of a pulse-width-modulation inverter. If we compare the water-tree length among single-frequency voltages, the water tree grows faster if the frequency is higher. However, if we superpose a power-frequency voltage onto the high-frequency voltage, the tree growth is suppressed. The tree length becomes shorter if the superposed power-frequency voltage is higher. This surprising result is explainable by considering that the zero-crossing of the applied voltage plays an important role for the tree propagation. In case that the high-frequency voltage is superposed onto a dc voltage, the dc voltage seems not to have any influence to the tree growth. This result can be also explained by considering the number of voltage reversals at the tree tip.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 300-303 |
| ページ数 | 4 |
| ジャーナル | Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report |
| 巻 | 1 |
| 出版ステータス | Published - 1997 12月 1 |
| イベント | Proceedings of the 1997 Annual Conference on Electrical Insulation and Dielectric Phenomena. Part 2 (of 2) - Minneapolis, MN, USA 継続期間: 1997 10月 19 → 1997 10月 22 |
ASJC Scopus subject areas
- 電子工学および電気工学
- 産業および生産工学
- 建築および建設