Al 비율에 실리콘 고무의 정전기 대전 특성

이성일,Lee, Sung-Ill 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.8

In this study, using the silicone rubber sample of $4cm{\times}4cm{\times}0.1cm$ for low voltage cable, the electrostatic electrification properties of three samples that the conductive Al of 0%, 25%, and 50% is attached to the surface of sample was measured. The following conclusion was obtained through this experiment. 1) In case of the sample which has the Al area of 50%, the higher the humidity to 90% in the temperature of $10^{\circ}C$, the electrostatic electrification voltage was reduced about 0.25 kV to 0.02 kV, and it confirmed that the electrostatic electrification voltage was in constant about 0.02 kV in the temperature over $20^{\circ}C$. 2) Increasing the Al area of samples of 0%, 25%, and 50% in temperature of $10^{\circ}C$, it confirmed that the electrostatic electrification voltage was reduced by about 2.67 kV, 2.02 k, 0.21 kV. 3) This study shows that the conductor, followed by temperature and humidity affects the electrostatic electrification voltage.

충전제가 실리콘 고무의 정전기 대전에 미치는 영향

이성일 한국교통대학교 2021 한국교통대학교 논문집 Vol.56 No.-

In this study, a voltage of 10 kV was applied to the silicone rubber specimenon. As the mixed amount of the filler was increased to 50phr, 60phr, and 65phr, 50% half-life was not shown, and it was confirmed that the electrification voltage and the attenuation rate were also increased when time was 60 sec. When the voltage was 6 kV, 8 kV, and 10 kV were added to the specimen containing 50 phr of the filler, the he electrification voltage voltage increased and the attenuation rate decreased slightly. It was confirmed that humidity affects surface resistance and filler affects volume resistance.

정전발전 기반 바람에너지 수확장치의 최적화 및 고전압 생성을 위한 활용 방안

장순민 ( Sunmin Jang ),라윤상 ( Yoonsang Ra ),조수민 ( Sumin Cho ),감동익 ( Dongik Kam ),신동진 ( Dongjin Shin ),이희규 ( Heegyu Lee ),최부희 ( Buhee Choi ),이세혁 ( Sae Hyuk Lee ),차경제 ( Kyoung Je Cha ),서경덕 ( Kyoung Duck Seo 한국화학공학회 2022 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.60 No.2

휴대형, 착용형 전자기기의 활용범위가 넓어지면서, 무겁고 부피가 큰 고체 배터리의 한계점이 드러나고 있으며, 배터리의 역할을 일부 분담할 수 있는 소형 에너지 수확 장치의 개발이 시급한 가운데, 일상 생활 속에서 버려지는 에너지원에 대한 활용도가 중요해지고 있다. 정전발전 기술은 두 물질 표면의 접촉과 분리에 의해 발생되는 마찰대전 효과와 전하유도 현상에 기반해 전기를 생산할 수 있기 때문에, 주변환경에 존재하는 역학적, 기계적 에너지원을 복잡한 중간과정을 거치지 않고도 효과적으로 수확할 수 있다는 장점을 지니고 있다. 인간의 주변환경에 존재하는 에너지원 중에서도 바람에너지는 자연환경에 존재하는 무한한 친환경 에너지원으로써, 그 수확과 활용에 대한 관심이 높은 신재생 에너지원이다. 본 연구에서는 정전발전 기술을 기반으로 하여 이러한 바람에너지의 효과적 수확을 위한 에너지 수확 장치의 최적화와 정전발전 기술의 활용도를 극대화할 수 있는 활용 방안에 대해 분석하였다. Fluttering film을 이용한 Natural wind based Fluttering TENG (NF-TENG)를 개발하였으며, 바람에너지의 효과적 수확을 위해 설계 최적화를 진행하였다. 또한 낮은 전류와 높은 전압을 발생시키는 TENG의 고유 특징을 부각하여 안전한 고전압 발생 시스템을 개발하여 고전압을 요구하는 분야에서의 활용 방안을 제안하였다. 따라서 본 연구에서 도출한 연구 결과는 정전발전 기술을 기반으로 하는 소형 에너지 수확장치를 이용해 일상생활 속에서 버려지는 바람에너지를 수확하여 고전압이 필요한 분야에서 폭넓게 활용할 수 있는 방법으로써 큰 잠재력을 보여줌을 시사한다. As the scope of use of portable and wearable electronic devices is expanding, the limitations of heavy and bulky solid-state batteries are being revealed. Given that, it is urgent to develop a small energy harvesting device that can partially share the role of a battery and the utilization of energy sources that are thrown away in daily life is becoming more important. Contact electrification, which generates electricity based on the coupling of the triboelectric effect and electrical induction when the two material surfaces are in contact and separated, can effectively harvest the physical and mechanical energy sources existing in the surrounding environment without going through a complicated intermediate process. Recently, the interest in the harvest and utilization of wind energy is growing since the wind is an infinitely ecofriendly energy source among the various environmental energy sources that exist in human surroundings. In this study, the optimization of the energy harvesting device for the effective harvest of wind energy based on the contact electrification was analyzed and then, the utilization strategy to maximize the utilization of the generated electricity was investigated. Natural wind based Fluttering TENG (NF-TENG) using fluttering film was developed, and design optimization was conducted. Moreover, the safe high voltage generation system was developed and a plan for application in the field requiring high voltage was proposed by highlighting the unique characteristics of TENG that generates low current and high voltage. In this respect, the result of this study demonstrates that a portable energy harvesting device based on the contact electrification shows great potential as a strategy to harvest wind energy thrown away in daily life and use it widely in fields requiring high voltage.

EV 구동모터용 헤어핀 스테이터 개발에 관한 연구

임정윤(Jungyoon-Lim),강태준(Tae-June Kang) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

Currently, Electrification is the biggest trend in the global automobile market. Electric vehicles replace traditional internal combustion engines, where an electric motor generates traction. As electrification progresses in the automobile market, the development of electric vehicles in various segments is necessary. It is necessary to develop a driving motor with high efficiency and output for such electric vehicles. In order to achieve this, the improvement of the power density and the increase of the cooling performance are important points. The conventional driving motor for electric vehicles used a stator using a round wire. For higher performance, a hairpin stator using a square coil was developed. This improves the fill factor of the coil, and high efficiency and output can be obtained. Compared to the round wire stator, the hairpin stator has superior cooling efficiency and is suitable for mass production because of its excellent productivity. Another important point of electric vehicles is the use of high voltage. High voltage can increase charging efficiency, and can increase output and power density. This study is about the design of a high-voltage, high-fill-factor hairpin stator.

Couette 흐름현상을 이용한 초고압변압기의 유동대전 기구 연구

곽희로,정용기,권동진 한국조명전기설비학회 1995 조명.전기설비 Vol.9 No.4

The purpose of this paper is to analyze the streaming electrification mechanism (SEM) generated in UHV transformer. This experiment used Couette Charger and interpreted the mechanism hydromechanically and electromagnetically. This work estimated the turbulent core density ($\rho$o) by measuring the short circuit current (isc) and the open circuit voltage (νoc) generated in Couette Charger and also studied the changes of the short circuit (isc), the open circuit voltage (νoc), the turbulent core density ($\rho$o) and the conductivity ($\sigma$) with adding BTA to restrain streaming electrification. as a result adding BTA increased the conductivity of oil and decreased the turbulent core density($\rho$o).

실리콘 고무의 면적 변화에 따른 정전기 대전 특성

Lee, Sung-Ill 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.9

This study made a specimen (contact surface size: $45\;mm{\times}0.02\;mm{\times}45{\sim}55\;mm$) with silicon rubber for low voltage cable with 50 phr silica filler. The electrification voltage of electrostatics were measured for different sizes of contact surface with the applied voltage of 10kV and the environmental settings of temperature ($25{\sim}40^{\circ}C$) and humidity (40~80%). The following conclusions were made. The electrification voltage of electrostatics decreased as the humidity increased. The electrification voltage of electrostatics increased as the temperature increased. The larger the surface size, the higher the electrification voltage of electrostatics. The property of the material had more effect on the relaxation time than the humidity.

절연용 유리장섬유의 정전기 대전완화 특성에 관한 연구

이성일,이원재,Lee, Sung Ill,Lee, Won Jae 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.12

In this study, the characteristics of electrostatic attenuation in plain shape glass filament sample (0.29 mm thickness, cross section of $12.25cm^2$, $16cm^2$, $20.25cm^2$) for insulator has been measured at temperature of $5^{\circ}C{\sim}38^{\circ}C$, humidity of 50%~90%. The results of this study are as follows. In case of samples that the cross section is $12.25cm^2$, $16cm^2$, $20.25cm^2$ at humidity of 50%~90%, it found that the electrification voltage of electrostatic increased with increasing temperature, with a return to decrease at $20^{\circ}C$. In case of samples that the cross section is $12.25cm^2$, $16cm^2$, $20.25cm^2$ at temperature of $5^{\circ}C{\sim}38^{\circ}C$, it found that the electrification voltage of electrostatic decreased with increasing humidity. In case of the sample at temperature of $20^{\circ}C$ and humidity of 65%, 75%, it found that the electrification voltage of electrostatic increased with increasing cross section. In case of the sample at humidity of 65% and cross section of $12.25cm^2$, the time that it takes to reduce electrification voltage of electrostatic in half decreased to 0.912s, 0.736s, 0.673s with increasing temperature to $10^{\circ}C$ $20^{\circ}C$, $30^{\circ}C$.

오손액 변화에 따른 실리콘 고무의 정전기 대전열화 특성

이성일,Lee, Sung Ill 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.9

In this study, the electrification voltage of electrostatics for silicone rubber sample($4cm{\times}4cm{\times}0.103cm$) following immersion with contaminants of 2 ml, 5 ml, 10 ml for six hours has been measured in through the applied voltage of 10 kV DC at temperature of $80^{\circ}C{\sim}110^{\circ}C$, humidity of 50%~90%. The results of this study are as follows. In case the contaminants is constant, it found that the electrification voltage of electrostatic decreased with increasing temperature and humidity to $35^{\circ}C$, 90%. In case of 2 ml of contaminants concentration, it found that the electrification voltage of electrostatic decreased with increasing temperature and humidity to $35^{\circ}C$, 50%. In case of the sample at temperature of $15^{\circ}C$ and humidity of 50%, it found that the electrification voltage of electrostatic decreased with increasing contaminants to 10 ml.

보강제 변화에 따른 실리콘 고무의 정전기 열화 특성에 관한 연구

이성일,Lee, Sung Ill 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.2

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.

신장율 변화에 의한 폴리프로필렌 필름의 정전기 대전 특성

이성일,김상현,Lee, Sung-Ill,Kim, Sang-Hyeon 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.1

This paper examined the effects of specimen elongation on the electrostatic electrification voltages when polypropylene film specimens with 500%, 650% and 700% elongations were rotated at 1550 rpm. The results were as follows. The decease of electrification voltage was not measured according to the time elapse, in case of elongated specimens with 70% environment humidity. As +10 kV was applied to the specimens with 650% elongations, the electrostatic electrification voltages were increased by the effect of environment humidity (1.23~1,25 kV at 50~60% humidity, and 1,46 kV at 70% humidity). The voltages were decreased to 1.2 kV at 700% elongation. As -10 kV was applied to the specimens with 500%, 650% and 700% elongations, the electrostatic electrification voltages were negatively increased with the increase of environment humidity and the elongation of specimens.