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이중 스카치 요크 기구를 이용한 접점 개폐 메커니즘의 설계
양홍익(H. I. Yang),안길영(K. Y. Ahn),정광영(K. Y. Jeong) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
In this paper, a double scotch yoke mechanism for moving simultaneously the fixed contact and moving contact of a gas circuit breaker is proposed and designed to improve the breaking characteristics of the circuit breaker. Firstly, the design parameters of the scotch yoke are kinematically determined from the desired design condition of the circuit breaker. Next, the stroke curve of the moving contact is designed by considering the design parameter and the specified opening characteristics of electric contacts. Based on the scotch yoke and stroke curve, the dynamics of the electric contacts is analyzed using ADAMS model of switch mechanism.
박우진(W.J. PARK),안길영(K.Y. AHN),양홍익(H.I. YANG) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Vacuum interrupters are now widely used for medium voltage switching up to 38kV in such applications as metal-clad switchgears, circuit breakers, etc. Vacuum interrupter minimizes the damage and loss of the contact electrodes, in breaking an interrupting current, due to its quick vacuum insulation recovery characteristics. The fixed and moving electrodes of vacuum interrupter are mated by a driving mechanism within several milliseconds. Therefore, rebound phenomena could occur between the electrodes due to considerable impact forces. Because such impact forces could cause structural damages to vacuum interrupters and shorten the fatigue-life of the electrodes, an impact analysis becomes a very important method to investigate the dynamic behavior of the vacuum interrupter. In this paper, the dynamic characteristics of electrodes are analyzed based on the derived dynamic material properties and impact analysis is carried out with explicit finite element method. To predict mechanical safe-life of a vacuum interrupter of axial type through impact analysis, the S-N curve of the materials is obtained by fatigue experiments.
이동식(D. S. LEE),이현욱(H. W. LEE),정영우(Y. W. Jeong),양홍익(H. I. Yang),안길영(K. Y. Ahn) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Recently, high reliability of electrical power system is required. Accordingly, for the protection of the power systems used circuit breakers are required high reliability. Nowadays general interruption time of circuit breaker is 3~5 cycle, but recently, to meet the needs of the high reliability, research on high speed circuit breaker has been made. The studies of high speed circuit breaker consist of research of high speed protection relay and high speed circuit mechanism. In this study, we proposed high speed mechanism with hybrid type mechanism, which consists of conventional spring mechanism and Thomson coil actuator.