• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2002년도 종합학술발표회 논문집 Vol.12 No.1
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• pp.361-365
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• 2002

Three types of the coupling structures in combline resonators are presented: magnetic, electric, and mixed coupling structures. The magnetic coupling structure is provided by the window, and the electric coupling is provided by the electric probe. The mixed coupling structure which is the superposition of the magnetic and electric coupling structures, is proposed for the electric coupling in combline resonators with easy tuning capability. The responses of each coupling structure are shown. A 4-pole combline filter is designed and fabricated as an application of those coupling structures, and shows good filter responses.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2006년도 춘계학술발표논문집
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• pp.302-306
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• 2006

In this study, we analyzed the influence of electrical pole by FEM(Finite Element Method) and developed protective system by designing and interpreting protective system for electrical pole when abnormal strength worked on messenger wire. Protective system did not shed messenger wire under wind pressure and discontent load but did assign a part to preventing rupture of electrical pole through automatically shed messenger wire over fixed strength. Structure of protective system analysis by FEM and prove property by measuring tensile strength for practical product.

• 전기학회논문지
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• 제67권8호
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• pp.1040-1046
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• 2018

The Permanent Magnet Synchronous Motor(PMSM) has various advantages. However, new types of research have been carried out because of rising prices of materials for rare earth magnets used in PMSM and also unstable supply. In this paper, we propose Consequent Pole(CP) type IPMSM for magnet reduction. The shape of CP type IPMSM stator was same with Basic model IPMSM. The design of the rotor shape was proceeded that CP type IPMSM achieved the same output as the basic model IPMSM. Finally, the selected model and IPMSM were compared and discussed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.290-292
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• 2003

The intake tower of D-dam located in a mountainous area positioned in the left side of the dam and its structure installed alone on the water surface then, can become target of direct lightening. To protect the intake tower from the direct lightening and indirect-lightening, lightening rod installed in the top area of the intake tower and ground pole laid under the surrounding ground. however, because the surrounding ground almost consists of a rock, it is very difficult to obtain the grounding resistance. It is main object to examine the construction plan of the optimum lightening rod equipment and ground pole with measuring the earth specific resistance of the around of the intake tower which is the scheduled area to lay the ground pole with the Wenner's 4-electric pole method and the Schlumberger's method. and using the analysis tool, ESII.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 하계학술대회 논문집
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• pp.418-420
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• 2007

When the magnetic levitation system(MAGLEV) initially rise, The MAGLEV has a weak point that is very large variation of the electric current. In this paper, The author applied the multi-loop-control to stably control the magnetic levitation system(MAGLEV). The gains of the control algorithm were selected based on pole locations formulated from a prototype Bessel transfer function model. The design incorporate tradeoffs in DC-to-DC converter hard-ware para-meters and pole locations. In order to confirm the superiority of the proposed pole selection and controller, MATLAB simulation and experiment results are presented.

• 전기저널
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• 10호통권118호
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• pp.58-61
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• 1986

• 전기저널
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• 12호통권120호
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• pp.47-51
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• 1986

• 전기저널
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• 11호통권119호
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• pp.68-72
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• 1986

• 전기저널
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• 9호통권117호
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• pp.56-61
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• 1986

• 조명전기설비학회논문지
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• 제24권8호
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• pp.62-69
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• 2010

연약지반에 시공하는 많은 콘크리트전주가 외부하중으로 전도파괴가 발생하는데 본 연구에서는 실물인장실험을 실시하고 근가위치, 근가깊이, 근가개수, 전주근입깊이를 달리하면서 전주에 작용하는 수평토압을 분석하였다. 실물실험은 10가지 종류로 나누어 실험한 결과 수평토압은 전주 근입깊이가 클수록 커지고 하부수동영역이 길어지는 것으로 나타났다. 근가 설치위치가 깊을수록 하부수동영역 토압이 감소된다. 근가의 수를 4개 설치한 것이 G.L-0.9[m] 위치에서의 토압을 크게 줄였는데 이는 수직으로 80[cm]정도에 걸쳐 설치된 근가의 영향으로 판단되나 전체적으로 볼 때 근가의 수는 큰 차이가 없으며 근가를 다수 설치하면 굴착면적이 커져 되메우기 등 시공성이 떨어지는 단점이 있으므로 근가를 1개만 설치하여도 좋은 것으로 판단된다.