Dependence of the Shape of Electric Trees in Silicone-based Encapsulants on the Frequency of the Applied Voltage

• Ihori Haruo

  Graduate School of Science and Engineering, Ehime University

• Kodama Yuki

  Graduate School of Science and Engineering, Ehime University

• Fujii Masaharu

  Graduate School of Science and Engineering, Ehime University

• Jeon Hyeon-gu

  Graduate School of Science and Engineering, Ehime University

• Hara Koki

  Graduate School of Science and Engineering, Ehime University

• Ohsaki Koki

  Graduate School of Science and Engineering, Ehime University

Bibliographic Information

Other Title

• シリコーンゲル封止材中に生じる電気トリーの周波数依存性

Abstract

Silicone gels have been used as an encapsulant of power electronics modules. We investigated electric treeing in silicone gel under AC voltage. The growth patterns of the trees depended on the frequency of the applied voltage. At low frequencies (10mHz to 10Hz), a bubble appeared at the tip of needle electrode, and a simple tree grew at 10Hz. Trees had many small branches at 350 and 400Hz and did not appear at frequencies over 450Hz.

Journal

• IEEJ Transactions on Industry Applications

  IEEJ Transactions on Industry Applications 137 (5), 458-459, 2017

  The Institute of Electrical Engineers of Japan

Keywords

• electric tree
• pearl chain-type tree
• silicone gel

Details

• CRID: 1390001204659776896
• NII Article ID: 130005631935
• DOI: 10.1541/ieejias.137.458
• ISSN: 13488163
• ISSN: 09136339
• Web Site: https://www.jstage.jst.go.jp/article/ieejias/137/5/137_458/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed