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단일 전류센서를 사용한 마스터-슬레이브 전류 분배형 2개의 DC-DC 컨버터 병렬운전
손승찬,박상은,정민재,성세진 전력전자학회 2000 전력전자학회 논문지 Vol.5 No.2
기존의 2개의 컨버터를 병렬 운전하기 위해서는 2개의 변류기 (CT)가 필요하였으나, 본 논문에서는 1개의 변류기만으로도 2개의 컨버터를 병렬 운전 가능한 단일 전류센서 방식의 마스터-슬레이브 운전 방법을 제안하였다. 제안된 단일 전류센서 방식의 부하 전류 분배 성능을 확인하기 위하여, 2개의 컨버터를 설계, 제작하였고 기존방법 (예: 최대 전류법)과 부하 전류 분배 성능을 세 가지의 임의 조건하에서 시뮬레이션, 부하 실험을 통하여 비교하였다. 실험 결과 컨버터 2대를 병렬 운전하는 경우, 기존의 방법으로는 2개의 CT가 필요하였으나 제안한 단일 전류센서 방식을 이용한면 1개의 CT만으로도 부하 전류 분배가 잘 이루어짐을 확인할 수 있었다. We discussed load CUlTent sharing for Master/Slave convertedMSC) type two DC-DC Converters parallel operation using a single current sensor method. In the conventional method, two CTs have been used to share t the load CUlTent equally with two coηverters‘ This paper presents a novel load CUlTent distribution method u using a single CUlTent sensor that can share load CUlTent effectively with only one CT in the Master-Slave C conveη:ers(MSCs) type. To confirm parallel operational performance of proposed DC-DC converters parallel operation, two experimental prototype converters were designed, implemented and experimented under three a arbitrary conditions. A load cur‘rent shahring perforrnance of the proposed method was compared with that of a c conventional peak CUt${\gamma}$ent method requmng two CTs. Those experimental results show that load cUlTent s sharing performance of paralleled two converters using a single CUlTent sensor was good and operated as well a as conventional method (ex, Pe밟 CUlTent Method)
영상변류기 동작 방식을 이용한 2개의 컨버터 병렬 운전시 고장 탐지 및 분리
손승찬,성세진 전력전자학회 2000 전력전자학회 논문지 Vol.5 No.4
시스템 특성상 fault tolerant system을 위해 두개의 컨버티를 1개의 전류센서를 사용하여 영상변류기 동적 방식으토 병렬 운전하는 경우 컨버터에 고자이 발생하면 영상변류기 출력은 두 컨버터 공급 전류 차이이므로, 어떤 컨버터에서 고장이 발생하였는지 고정 탐지 및 분리가 곤란히였다. 본 논문에사는 fault tolerant system를 위해 2 개의 컨버터를 병렬 운전하는 경우 캔버터의 고장 탐지 및 분리를 위한 방안올 제시하고 실험을 통하여 제안한 방법의 타당성을 확인하였다. In case of operating two converters in parallel with ZCT operation method using one current sensor for fault tolerance by system characteristics, identifying fault detection and isolation is difficult of which converter is fault since the ZCT output is a difference of two converters' supply current when a converter has fault. This thesis suggest a fault detection and isolation method of converter in case of operating two converters in parallel for fault tolerant system and verified this suggested method through an experiment.
강경호,손승찬,김재민,김현정,Kang, Kyoung-Ho,Seon, Seung-Cheon,Kim, Jae-Min,Zhuo, Liang Liang,Lim, Sang-Min,Kim, Hyeon-Jeong The Malacological Society of Korea 2009 The Korean Journal of Malacology Vol.25 No.1
The trumpet shell Charonia sauliae is an endangered and valuable species with potential for aquaculture. For artificial propagation of C. sauliae, the effects of three different food microalgae on the development, growth, and survival rate of the larvae and spat were investigated. For the larval feeding experiments, we utilized six microalgae species as food sources, namely Pavlova lutheri, Tetraselmis suecica, Nannochloris oculata, Isochrysis galbana, Chaetoceros calcitrans, and Phaeodactylum tricornutum; for the larval and spat growth and survival experiments, we utilized T. suecica, C. calcitrans, and P. tricornutum. The results showed that the temporal digestion index (TDI) for the veliger larvae was significantly different for C. sauliae fed the different microalgae species (p < 0.05), that the T. suecica, C. calcitrans, and P. tricornutum cultivars were better suited for larval consumption (p < 0.05), and that the growth and survival of the larvae and spat were significantly influenced by food type, specifically P. tricornutum (p < 0.05). Further research is needed to evaluate the effects of other microalgae species, different algal concentrations, and biochemical composition on the growth and survival of C. sauliae.
Sex Differences in Hippocampal Neuronal Sensitization by Nicotine in M. gerbils
허영나,손승찬,이준상,전보권,원청길,이형하,김동훈,최상현,신경호 대한약리학회 2013 The Korean Journal of Physiology & Pharmacology Vol.17 No.5
We studied the sex different nicotine effect on evoked population spike amplitudes (ePSA) and connexin (Cx) expression in the hippocampus CA1 area of gerbils. Acute doses of nicotine bitartrate (0.5 mg/kg: NT-0.5) slightly reduced ePSA in males but markedly augmented that in females. Acute NT (5.0 mg/kg) markedly increased the ePSA in all gerbils. Unlike acute NT-0.5, repeated NT-0.5injection (twice a day for 7 days) significantly increased the ePSA in males and slightly affected the NT-0.5 effect in females. The Cx36 and Cx43 expression levels as well as Cx expressing neuronal populations were significantly increased by repeated NT-0.5 in in both male and female gerbils, and particularly, Cx43 expression was somewhat prominent in females. These results demonstrated a sex difference with respect to the nicotine effect on hippocampal bisynaptic excitability, irrelevant to connexin expression.
ZCT 방식을 이용한 두 개의 컨버터 병렬 운전 시 고장 검출 및 분리
정민재(Min-Jae Jung),박상은(Sang-Eun Park),손승찬(Seung-Chan Sohn),이진(Jin Lee),성세진(Se-Jin Seong) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
The paper presents the fault detection and isolation of two DC-DC converters parallel operation by ZCT method. Two experimental prototype converters were designed and implemented for evaluation of fault tolerant system. The experimental results show that fault detection and isolation circuit works very well.
300kHz ZVS Full Bridge PWM 컨버터에 관한 연구
주형준(H.J Joo),김의찬(E.C Kim),최재동(J.D Choi),손승찬(S.C Son),성세진(S J Seong) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
This Paper is concerned on developing DC-DC converter using ZVS-FB-PWM Converter. The converter output is 28V and regulated by phase shift control methode. MOSFET is used by the main switching device and high frequency transfomer is made for operating at 300kHz swiching frequency When the load vary widely, converter's ZVS characteristic is expressed by experiment result