• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.274-279
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• 2007

The fault identification of electrical rotating machinery have been special interests due to one of important elements in the industrial production line. It is directly related with products quality and production costs. The sudden breakdown of a motor will affect to the shut down of the whole processes. Therefore, rotating machines are required to a periodic diagnosis and maintenance for improving its reliability and increasing their lifetime. The objective of this work is to develop the diagnosis system with current signals for the effective identification of healthy and faulty motors using the developed diagnosis algorithm, which consists of the feature calculation, feature extraction, and feature classification procedures.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.379-384
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• 2007

In this paper, a new method for detecting rotor vibrations in a squirrel-cage induction motor is proposed. The air-gap flux variation analysis was done using search coils inserted in stator slots when rotor vibration conditions occurs. An accurate modelling and analysis of air-gap flux variation in the induction motor are developed using finite-element (FE) software packages, and treasuring the flux are made using search coils. In the FE analysis and experiment, the three-phase squirrel-gage induction motor with 380 [V], 7.5 [kW], 4 Poles, 1,768 [rpm] ratings is used. The simulation and experiment results can be useful for detecting rotor vibration of the induction motors.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.313-314
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• 2006

고유가 시대를 맞아 에너지효율이 높은 고효율기기에 대한 관심이 점점 높아지고 있다. 이에 따라 본 논문에서는 주요 전기기기에 대한 세계 주요 각 국의 효율기준 설정 방법을 비교하고자 한다. 미국, 유럽, 호주, 캐나다 둥 선진국의 효율기준 설정 방법과 현재 국내의 효율기준 설정방법을 비교 분석하여, 국내의 실정에 적합한 효율기준 설정을 위한 방향을 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전력기술부문
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• pp.192-194
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• 2006

In this paper, the situation of energy efficiency standards for motors and diffusion states are analyzed and a new methodology is proposed using diffusion models and learning curves. The existing diffusion models could not explain affects from new appliances' penetration during the diffusion. But a mixed diffusion model with learning curves or learning ratio is studied to explain this penetration.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전력기술부문
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• pp.213-215
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• 2006

우리나라와 같이 에너지자원이 없어 전량을 수입에 의존하여야 하는 나라에서는 에너지 소비절약이라고도 일컬어지는 고효율 기기의 보급에 많은 관심을 가져야 한다. 고효율기기의 사용은 전체적인 부하전력량을 줄여나가며, 한번 보급되면 계속 에너지를 감할 수 있고, 부하를 차단하여야 하는 불편도 적어지게 된다. 또한 기술개발로 인한 기기수출효과 및 다양한 효과가 있으므로 국가적으로는 커다란 이익이 될 수 있다. 따라서 고유가시대를 맞아 고효율 기기의 사용에 특히 많은 관심을 가져야 하며, 정부에서도 많은 관심을 가지고 있기도 하다. 본 논문에서는 전체 전력소비량의 20%이상을 차지하는 조명기기에서 고효율조명기기에 대해 확산 모형을 이용하여 보급상태를 분석해 보고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전력기술부문
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• pp.216-218
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• 2006

Economy of world has grown rapidly. This growth has increased the ownership of household electrical appliances including room air conditioners. The number of users of air conditioners is predicted to grow dramatically in the future. This paper discusses the present status of residential appliance energy efficiency standards around the world. The study found that the energy efficiency standards for room all conditioners would mitigate a significant amount of emissions in Korea.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2007년도 춘계학술대회
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• pp.252-252
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• 2007

• The Korean Journal of Ceramics
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• 제3권4호
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• pp.249-252
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• 1997

Highly oriented ZnO thin films were fabricated by dip-coating technique using zinc acetate 2-methoxyethanol 2-aminoethanol solution as starting materials, and effects of substrates on the film's orientation were investigated. Product films were obtained by prefiring at 300, 400, 500 and 550℃ for 10 min, followed by final heat-treatment at the same temperatures as prefiring for 1h. c-axis oriented films on glass substrates were prepared by heat treatment of prefiring films at 300-550℃, while films on alumina showed polycrystalline structure. Films with c-axis orientation exhibited lower specific resistivities than those of polycrystalline films with partial crack and pore.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2009년도 정보통신설비 학술대회
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• pp.349-352
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• 2009

WBAN/USN systems are applied from the various environment. Therefore, it is coming to be important efficient use power and communication method. The present paper materialize Slave node system which get power from light energy. Also, it materialize Wake-up module and self-power-off circuit which use S-R Flip Flop for efficient using power. This system can be efficient using power at Slave node system. Also, it can be possible application of Self sustaining system by performance verification Wake-up module which determine system "on" without power and Self-power-off circuit.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.294-297
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• 2006

Using a single LC panel and two lighting systems, we have developed an advanced LCD system called "Double-Sided LCD." It has only one LC panel and two lighting systems, but it can display images of the same size and resolution on both the front and the rear side. Furthermore, utilizing a simple and thin lighting system we have reduced dramatically its module thickness up to 3.0mm, much thinner than that of conventional dual-type LCD, which is quite appropriate for the use of mobile applications.