The Effect of Ultrasonic Wave on the Characteristics of Tree Growth and Dielectric Loss in Polymer Insulation Material

고분자 절연재료내의 Tree성장과 유전손 특성에 미치는 초음파의 영향

  • 전춘생 (인하대 공대 전기공학과) ;
  • 김원식 (삼성전기 제2 연구실) ;
  • 김상현 (경상대 공대 전기공학과) ;
  • 박원규 (중앙직업훈련원 전기과)
  • Published : 1991.12.01

Abstract

This paper is to investigate the tree growth phenomena and the characteristics of $\varepsilon$' and tan$\delta$ for the effect of ultrasonic wave on polymer insulation material. The conclusions are as follows. 1) As the pressure amplitude of ultrasonic wave is larger and its irradiated time is longer, tree inception voltage and its breakdown voltage in specimen are smaller, and tree growing is faster. 2) As the irradiated quantity of ultrasonic wave is more increased, the value of tan$\delta$ is larger, but the value of $\varepsilon$' is almost constant. 3) The effect by the pressure amplitude of ultrasonic wave is greater than that by its irradiated time on the insulation characteristics of polymer material.

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