• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.725-726
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• 2008

This paper deals with characteristic analysis of Linear Switched Reluctance Motor (LSRM) according to switching condition. When approved current in each phase by decided position, we made sure current and voltage according to turn-on, turn-off. In dynamic simulation of LSRM, through an experiment, we decided turn-on position of inductance profile. Also, we presented dynamic characteristic analysis model which is consisted at motor and sensor signal part, etc., and substitute circuit constant that get using magnetic equivalent circuit method, we confirmed current and voltage waveform.

• Proceedings of the KIEE Conference
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• 1999.11b
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• pp.267-269
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• 1999

One of the main jobs of the operators is to make it sure to have a service continuity in a fault situation. This paper proposes a restoration index which indicates the restoration capability of the feeder in case of a fault. A necessary and sufficient condition for a feeder to have 100% restoration of the outage is also described.

• 한국IT서비스학회:학술대회논문집
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• 2005.05a
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• pp.495-500
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• 2005

현재 리눅스 기반 데스크탑 환경에서는 C, C++, JAVA와 같은 프로그램 언어로 작성된 프로그램을 개별적으로 처리할 수 있는 컴파일러들과 디버거들이 존재하지만, 소프트웨어 개발자들은 그래픽 환경 프로그래밍에 적합한 통합개발환경하에서 프로그램을 개발하기를 원한다. 이를 위해, 본 논문에서는 부여 리눅스 기반 데스크탑 환경을 위한 통합개발환경을 제안한다. 본 논문에서 제안하는 통합개발환경은 오픈 소스 기반 프로그램 도구인 Eclipse를 기반으로 통합개발환경에서 제공하는 컴파일, 디버깅과 같은 일반적인 기능들뿐만 아니라 XML 정보저장소(repository)를 활용하여 소스 코드 기반 소프트웨어 시험 자동화 기능을 통합하여 사용자가 체계적이고 계획적인 소프트웨어 테스트를 수행할 수 있도록 하며, 신뢰성 있는 소프트웨어 개발을 할 수 있도록 지원한다.

• Proceedings of the KIEE Conference
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• 2005.04a
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• pp.99-101
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• 2005

This paper deals with drive characteristics of LSRM according to position detection angle. Position of LSRM detected approximation sensor. Position choose mover of LSRM and inductance. When approved current in each phase by decided position, we made sure current and voltage according to turn-on, turn-off.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.909-910
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• 2007

To design the Molded Case Circuit Breaker(MCCB) requires electromagnetic analysis in contact system when the circuit breakers interrupt fault currents. This paper has made sure that there are two ways increasing arc driving force, one is a change of contact point and the other way inserts additionally the magnetic plate. Finally, we have carried out the analysis of eddy current to identify a decrease of arc driving force because of fault currents. In this paper, MCCB models have been analyzed base on 3D-FEM by Maxwell program.

• Journal of Institute of Control, Robotics and Systems
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• v.21 no.12
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• pp.1136-1141
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• 2015

In this paper, we develop a sliding mode controller that uses a nonlinear sliding manifold for the permanent magnet synchronous motor. The proposed controller makes sure that both currents and velocity tracking error converge into equilibria. Nonlinear sliding manifold consists of current dynamics and nonlinear functions which are designed with velocity tracking error and its integrated term. The nonlinear functions are designed to guarantee that velocity tracking error converge into zero. The closed-loop stability is proven by Lyapunov theory. The effectiveness of proposed method is demonstrated by numerical simulation results.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.875_876
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• 2009

Recently, Interior Permanent Magnet Synchronous Motor(IPMSM) is widely used in the industry applications such as power train for hybrid vehicles and compressor motors of air-conditioner due to its high power density and wide speed range. There are some ways for confirming of maximum power in IPMSM. However, This paper suggests that there is a way about making sure maximum power by reducing turn numbers of armature winding. Setting up the voltage equation through the equivalent circuit and vector diagram of IPMSM first, and then estimating the parameter and power of IPMSM by changing the turn numbers of armature winding and voltage. In order to satisfy output power, the turn numbers of armature winding is changed by using the characteristic analysis, and then checking whether secure maximum power or not.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.48
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• pp.79-100
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• 2010

To promote the nation's exports, in Korea several government led programs are alive for procuring and manufacturing goods for export. The trade supporting programs are consisted of Trade Financing Program, Trade Tax Program, and Trade Insurance. The programs are summarized ; First, Trade Financing Program is available to exporters of procuring raw materials and finished goods for export. It is extended with exceptionally low interests from the Korean commercial banks. Second, Trade Tax Program provides whole or part of customs drawback to exporters. customs drawback is' made when exporters meet requirements of Customs for export. Third, Trade Insurance Program cover risks of uncertainty which is beyond the exporters' capacity at low insurance premium. It is suggested that the exporters have deep knowledge of these three programs to their ends. Especially Trade Financing Program and Trade Insurance Program can be a combined work for the financially weak SMEs. Further, there are rooms for these programs to develop to enhance the competitiveness of SME exporters.

• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.397-399
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• 2000

This paper presents a method for assessing reliability indices of transmission system. Because successful operation of electric power under the deregulated electricity market depends on transmission system reliability management, quantity evaluation of transmission system reliability is very important. The key point idea is based on that the reliability level of transmission system is equal to reliability level difference of between composite power system(HLII) and generation system(HLI). It is sure that risk indices of reliability of composite power system are larger than those of generation system. It is the reason that composite power system includes uncertainties and capacity limit of transmission lines. The characteristics and effectiveness of this methodology are illustrated by the case study using MRBTS.

• Journal of information and communication convergence engineering
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• v.15 no.4
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• pp.227-231
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• 2017

Recently, as the number of safety accidents caused by reagents increases, researches on a system that can reduce safety accidents are underway. Existing systems managed reagent cabinet through various sensors. On the other hand, there are disadvantages in that countermeasures against simultaneous danger situations are insufficient at multi-reagents cabinet. In order to solve this problem, this paper proposes a system to manage the reagents cabinet through danger priority. Danger priorities are selected through domestic chemical accident cases and the Chemical Safety Management Act. If a danger situation occurs in the reagent cabinet, make sure it is from a single or multiple reagent cabinets. For multiple reagent cabinets, compare the reagent cabinet priorities and run the device sequentially from the reagent cabinet with the highest priority. Thus, by operating the device according to the danger priority, the chain reaction can be prevented in advance and the reagent cabinet can be safely managed.