현장 / 목회단상 / 성전건축

임성훈 기독교대한성결교회 활천사 1969 활천 Vol.342 No.-

자속구속형 초전도 사고전류 제한기의 직렬연결을 통한 동시 퀜치 특성 향상

임성훈,Lim, Sung-Hun 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.8

본 논문에서는 자속구속형 초전도 사고전류제한기의 전압등급증대를 위한 방안으로 하나의 철심을 매개로 직렬로 연결된 자속구속형 초전도 사고전류제한기를 제안하고 이의 사고전류제한 특성을 분석하였다. 직렬 연결된 각각의 자속구속형 초전도 사고전류제한기의 구조는 두 개의 코일이 하나의 철심을 매개로 병렬로 연결되며 초전도 소자가 두 코일중 하나의 코일과 직렬로 연결된 구조를 가진다. 하나의 철심을 매개로 공유된 내부자속은 직렬연결된 각각의 자속구속형 초전도 사고전류제한기를 구성하는 초전도 소자들의 임계전류차이로 인한 불균일한 전력분담을 균일하게 유지시켜 주는 것을 실험을 통해 확인하였다. To apply the flux-lock type superconducting fault current limiter(SFCL) into power system, its current and voltage ratings are required to increase. Especially, in case of series connection of SFCLs, the countermeasure for simultaneous quenches must be considered. The structure, which each flux-lock type SFCL unit was wound in series on the same iron core, can induce the simultaneous quench of superconducting elements. Through the fault current limiting experiment for the suggested structure, it was confirmed that the even voltage burden among the superconducting elements comprising SFCLs could be made.

히스테리시스 특성을 고려한 자속구속형 고온초전도 사고전류 제한기의 사고전류 제한특성 분석

임성훈,최명호,Lim, Sung-Hun,Choi, Myoung-Ho 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.2

자속구속형 초전도 사고전류 제한기는 평상시 자기적인 결합에 의해 철심의 히스테리시스 손실이 발생하지 않는 특징이 있다. 그러나 사고시에는 사고전류증가로 인해 고온초전도 소자의 저항발생과 함께 철심의 포화가 발생할 경우 제한기의 사고전류제한 특성을 저하시키는 현상이 발생하게 된다. 따라서 본 논문에서는 이를 분석하고 억제하기 위한 설계방안을 도출하기 위해 자속구속형 고온초전도 사고전류 제한기의 구성요소인 자속구속 리액터의 히스테리시스 특성을 고려한 사고전류 제한특성을 분석하였다. 이를 위해 제한기의 등가회로와 사고전류 제한실험으로부터 히스테리시스 곡선을 도출하였다. 1, 2차권선의 인덕턴스 비에 따른 히스테리시스 곡선으로부터 인덕턴스비가 증가함에 따라 제한되는 사고전류크기는 증가한 반면 사고시 자속구속형 사고전류제한기의 구성요소인 철심의 포화가 억제됨을 확인할 수 있었다. The fault current limiting characteristics of a flux-lock type superconducting fault current limiter (SFCL) considering hysteresis characteristics of a flux-lock reactor, which is an essential component of the flux-lock type SFCL, were investigated. In the normal state, the hysteresis loss of iron core in the flux-lock type SFCL does not happen due to its winding's structure. From the equivalent circuit for the flux-lock type SFCL and the fault current limiting experiments, the hysteresis curves could be drawn. Through the hysteresis curves together with the fault current level due to the inductance ratio between the primary and the secondary windings, the increase of the number of turns in the secondary winding of the flux-lock type SFCL made the fault current level increase. On the other hand, the saturation of iron core was prevented.

IoT(Internet of Things)시대의 선박 안전관리시스템 구축 연구

임성훈,고영규,박진수 한국항해항만학회 2014 한국항해항만학회 학술대회논문집 Vol.2014 No.춘계

IoT(Internet of Things)란 인터넷을 기반으로 모든 사물을 연결해 사람과 사물, 사물과 사물 간의 정보를 소통하는 지능형 기술 및 서비스를 말한다. 선박에는 다양한 기기가 서로 독립적으로 각자 역할을 수행하고 있으나, 이를 능동적으로 서로 연동하는 것은 실제적으로 쉽지가 않은 일이다. 이를 위한 수단으로 선박내의 통신, 선박간의 통신, 선박과 육상통신간의 구성을 SAN(Ship Area Network), RFID/USN, 광대역통신, 위성통신 등 다양한 IT 기술을 활용하여, 해양환경에서의 안전한 항행을 위한 선박의 안전관리시스템 구성 방안을 논하고자 한다. 본 논문에서는 선박의 다양한 안전관리시스템 분야 중에 선박내의 입 출입 인원관련 안전관리시스템 분야를 논의하고자 한다. IoT (Internet of Things) is connected to all things Internet-based people and things, things and objects that communicate information between said intelligent technologies and services. Shipping each of a variety of devices that act independently from each other, but, it is actively interlock with each other is not easy practically days. Ship it within the means of communication, the communication between the ship, the communication between ship and shore configuration, SAN (Ship Area Network), RFID/USN, broadband communications, satellite communications and IT technology to a variety of marine environments for the safe navigation the ship's safety management system for the configuration you want to discuss the plan.

션트리액터의 자기결합을 이용한 초전도전류제한기를 구성하는 초전도소자들의 전력부담 분석

임성훈,Lim, Sung-Hun 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.1

The power burden of high-$T_c$ superconducting (HTSC) elements comprising superconducting fault current limiter (SFCL) using magnetic coupling of shunt reactors was analyzed. The magnetically coupled shunt reactors play a role in distributing the even power burden between HTSC elements comprising the SFCL, which contributes to the effective current limiting and recovery characteristics of the SFCL. It was confirmed through the comparative analysis on the SFCLs with both the magnetically coupled and the magnetically uncoupled shunt reactors that the magnetically coupled shunt reactors could improve the SFCL's performance by equalizing the power burden of HTSC elements.

미래 무인무기체계의 형태 구분과 핵심기술

임성훈,김경수 한국방위산업진흥회 2022 國防과 技術 Vol.- No.518

변연융선평면을 계측기준으로 한 정상교합자의 구치부 치관경사도에 관한 연구

임성훈,윤영주,김광원 朝鮮大學校 口腔生物學硏究所 1998 Oral Biology Research (Oral Biol Res) Vol.22 No.1

In the previous studies, occlusal plane was used as a reference plane for measuring crown angulation (tip) for development of preadjusted brackets, and this reference plane was not parallel to the line connecting bracket slots (Andrews' plane) due to the curve of Spee. So, we developed a new reference plane more parallel to Andrews' plane, and independent to the curve of Spee. It is an imaginary line connecting mesial and distal marginal ridges of each posterior tooth, and we named it a marginal ridge plane. In this study, we compared measurements from both reference planes, and found that crown angulations measured from the occlusal plane were affected by the curve of Spee in the upper and lower 2nd molars (p < 0.01), and 1st premolars (p < 0.05). Crown angulations should be varied according to the amount of curve of Spee to maintain the continuity of marginal ridges. In the previous studies, there was an error in that applying crown angulations measured from the sample having some curve of Spee to the bracket system in which flat occlusal plane is one of their treatment goals. This error of disharmony between crown angulation and curve of Spee would cause marginal ridge discrepancies when the curve of Spee was completely leveled by the straight wire. So. if the flat occlusal plane is desired, crown angulation must be measured from the marginal ridge plane in the development of preadjusted brackets. If some curve of Spee is acceptable, an adjustment of bracket height to accommodate the curve of Spee especially in the upper and lower 2nd molar areas may be a solution.

교회순례 / 성전건축

임성훈 기독교대한성결교회 활천사 1969 활천 Vol.344 No.-

Fault Current Waveform Analysis of a Flux-Lock Type SFCL According to LC Resonance Condition of Third Winding

임성훈 대한전기학회 2008 Journal of Electrical Engineering & Technology Vol.3 No.2

The flux-lock type superconducting fault current limiter (SFCL) can apply the magneticfield into the high-TC superconducting (HTSC) element by adopting the magnetic field coil in its third winding. To apply the magnetic field into the HTSC element effectively, the capacitor for LC resonance is connected in series with the magnetic field coil. However, the current waveform of third winding for the application of the magnetic field is affected by the LC resonance condition for the frequency of the source voltage and can affect the waveform of the limited fault current. In this paper, the current waveform of the third winding in the flux-lock type SFCL according to LC resonance condition during a fault period was analyzed. From the diferential equation for its electrical circuit, damping ratio as design parameters. Through the analysis according to the design parameters of the third winding, the waveform of the limited fault current was confirmed to be influenced by the current waveform of the third winding and the design condition for the stable fault current limiting operation of this SFCL was obtained.

Analysis on Current Distribution of Four-Layer HTSC Power Transmission Cable with a Shield Layer

임성훈 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.3