• Title, Summary, Keyword: Electrostatics

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A Study on Electrostatic Degradation Properties of Silicone Rubber due to Reinforcing Agent (보강제 변화에 따른 실리콘 고무의 정전기 열화 특성에 관한 연구)

  • Lee, Sung Ill
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.2
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    • pp.120-125
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    • 2015
  • In this study, we have come to the following conclusions regarding to the electrification properties (electrostatic electrification voltage and electrification relaxation time) of electrostatics in the three type of specimen (size: $4cm{\times}4cm{\times}0.103cm$) of silicone rubber which is mixed with the ATH (Aluminium Trihydrate(Al($OH_3$)) of 30 phr, 60 phr, 120 phr as reinforcing filler. The electrification properties of electrostatics were measured for the different mixing ratio of ATH with the applied voltage of DC 10 kV at the temperature range of $10^{\circ}C{\sim}30^{\circ}C$ and humidity range of 60%~80%. When the temperature remained constant, the electrical resistance decreased as the humidity increasing in the range of 60%, 70%, 80%. In contrast, when the humidity remained constant, the electrical resistance increased as the temperature increasing in the range of $10^{\circ}C$, $20^{\circ}C$, $30^{\circ}C$. Regarding these results, may be it is because the absorption of O-H molecule appeared in the silicone specimen. It was confirmed that when the temperature remained constant, the electrification relaxation time decreased as the humidity increased. In contrast, when the humidity remained constant, the electrification relaxation time increased as the temperature increased.

A Study on Analysis of Electrostatics Destruction of Electronic Equipment (전자부품의 정전파괴(ESD) 분석에 관한 연구)

  • Lee, Du-Young
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.10 no.6
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    • pp.235-241
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    • 2010
  • The static electricity generated by friction of two objects is called frictional electricity. The main cause of troubles in electronic components for military and civil use as well as in military radar appliances is found mostly in parts like LSI memories, particularly when they lose information of function momentarily while in operation, which usually leads to a fatal cause of troubles in the equipment. Troubles occur if electric noise is caused by the spark effected from discharge of static electricity from the equipment that is used nearby.

The Effect of Interface Activation Substances in Reduction Phenomena of Streaming Electrification for Transformer Oil (변압기유의 유동대전 감소현상에 미치는 계면활성제의 효과)

  • Kim, Yong-Woon;Lee, Duck-Chool;Watanabe, Shigeo
    • Proceedings of the KIEE Conference
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    • pp.48-51
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    • 2000
  • The purpose of this study is to find the way to reduce the electrostatics by interface activation substances added in the insulating oil with concentration[ppm]. As results, The streaming current, surface tension and viscosity of the samples added nonionic and hermaphrodic substances are decreased but the conductivity is increased at higher point than the 1[ppm](c.m.c.), the other side the same phenomena of the samples added cationic and anionic substances are discovered at the 10[ppm].

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A Study on Electrification Properties of Electrostatics in Silicone Rubber (실리콘 고무의 정전기 대전특성에 관한연구)

  • Lee, Sung-Ill;Kim, Hee-Dae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.107-107
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    • 2010
  • IT 산업의 발달과 더불어 카메라, 휴대폰, 노트북, 캠코더 등 전기전자 응용분야에 복합기능성 실리콘 고무 시트가 사용되고 있다. 본 연구에서는 실리콘 고무의 사용시 발생하는 정전기를 방지하기 위해 습도와 온도 변화에 따른 정전기 대전전압을 측정하였다. 카본양의 증가에 따라서 대전전압이 감소하였으며 습도가 증가됨에 따라 정전기 대전량은 감소하였다. 12Phr카본 첨가시 대전과 동시에 완화가 일어남을 확인했다.

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A STUDY ON THE DESIGN, JOINTING, CHARACTERISTIC OF CONDENSER CONE OF SEALING-END FOR 154KV OF CABLE (154KV OF 종단 접속함용 CONDENSER CONE의 설계.접속.특성에 관한 연구)

  • Lee, H.S.;Oh, E.J.;Lee, K.B.
    • Proceedings of the KIEE Conference
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    • pp.621-623
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    • 1993
  • This paper describes the research in condenser cone of sealing-end for 154kV oil-filled underground cable. We conducted the design based on the results of electric field analysis by electrostatics theory and FEM. In case that condenser cone type EB-A was compared with bell mouth type EB-A, the results of the AC and lightening impulse voltage test showed improvment of 10 percents.

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A INSULATING DESIGN OF $SF_6$ GAS SEALING END OF CONDENSER CONE TYPE USED FOR 345KV OF CABLE (콘덴서 콘 방식의 345KV OF 케이블용 $SF_6$ 가스중 종단접속함의 절연 설계)

  • Kim, H.J.;Lee, S.C.;Oh, O.J.;Lee, H.S.
    • Proceedings of the KIEE Conference
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    • pp.1553-1555
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    • 1994
  • In this paper, we describes the research in condenser cone of $SF_6$ gas sealing end for 345KV oil-filled cable. The designed of condenser cone based on the results electric field analysis by electrostatics theory ana FEM. As a results. we have been designed the condenser cone and the inner insulation part of $SF_6$ seating end, the width and length, the number of condenser, the length of stress relief slope, the total length of condenser cone.

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Development of Aerosol Model Using Moment Method and Validation by Experiments (모멘트 방법을 이용한 에어로즐 모델의 개발과 실험을 통한 검증)

  • Kim Gyeong-A;Kim Dae-Seong;Park Seong-Hun;Gwon Sun-Park;Lee Gyu-Won
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • pp.385-386
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    • 2002
  • Many important physical properties of natural or man-made aerosol particles such as light scattering, electrostatics charges, and toxicity, as well as their behavior involving physical processes like diffusion and thermophoresis depend strongly on their size distribution. Important aerosol behavior mechanisms affecting the size distribution of aerosol particles include condensation, deposition, and coagulation. (omitted)

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The Effect of Interface Activation Substances in Reduction Phenomena of Streaming electrification (유동대전 감소현상에 미치는 계면활성제의 효과)

  • Kim, Y.W.;Lee, S.H.;Han, J.S.;Lee, E.H.;Lee, D.C.
    • Proceedings of the KIEE Conference
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    • pp.2146-2148
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    • 1999
  • The purpose of this study is to find the way to reduce the electrostatics by interface activation substances added in the insulating oil with concentration[ppm]. As results. The streaming current, surface tension and viscosity of the samples added nonionic and hermaphrodic substances are decreased but the conductivity is increased at higher point than the 1[ppm] (c.m.c.), the other side the same phenomena of the samples added cationic and anionic substances are discovered at the 10[ppm].

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The Effect of Nonionic Interface Activation Substances in Reduction Phenomenon of Streaming electrification (유동대전 감소현상에 미치는 비이온성 계면활성제의 효과)

  • Kim, Y.W.;Chung, K.H.;Yoo, K.M.;Yoo, J.H.;Lee, E.H.;Lee, D.C.
    • Proceedings of the KIEE Conference
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    • pp.1410-1412
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    • 1998
  • The purpose of this study is to find the way to prevent the electrostatics from the interface of liquid and solid by adding interface active substances to the insulating oil with concentration. As results, The streaming current, surface tension, and viscosity decreased and conductivity increased at the higher point than the c.m.c. which resulted from, the adding of the interface active substances.

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