• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.746_747
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• 2009

초전도 특성평가장치는 외부 인가 자장과 온도를 변화시켜 가며 고온 초전도 선재의 특성을 측정할 수 있는 장치이다. 본 논문에서는 먼저 설계된 초전도 특성평가장치용 마그네트에 대한 전자장 해석을 하였고, 이 마그네트에 iron을 설치하였을 때의 전자장 해석을 수행하였다. 전자장 해석을 통하여, iron을 설치하였을 때와 iron을 설치하지 않았을 때의 차이를 파악하도록 하였다. 그리고, iron의 두께에 따라 달라지는 자장 분포를 파악하여 초전도 특성평가장치에 iron을 설치하였을 때의 특성을 파악하도록 하였다.

• 전기학회논문지
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• 제58권3호
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• pp.502-508
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• 2009

The method to determine the operating current of HTS magnets needs to be different from that of LTS magnets. This paper presented estimation of the critical current of pancake windings. The pancake windings can be excited by a single power source or by multiple power sources. Critical currents were determined by using field dependent E-J relation. For the better estimation of the critical current, a new method to define the magnetic field of the HTS wire has been proposed. Calculated critical currents of pancake windings were compared with measured ones of the HTS BSCCO magnet consisting of 10 pancake windings. According to the test results, the estimated critical currents of pancake windings agreed well with that of measured ones. Effects of the single and multiple power source excitation on the critical currents have been also examined.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1994년도 추계학술대회 논문집
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• pp.192-197
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• 1994

High-Tc superconducting magnet properties were dependent upon design conditions such as its radius, length, critical current and notch size. In order to study, design and the simulation for small size magnet were implemented. We know that intensity of magnetic fields controled by critical current and factor ${\alpha}$( R$_2$/R$_1$) and uniformity controled by notch size. The optimal condition of intensity and uniformity magnetic field in this experiments are R$_1$=3[cm], R$_2$=12[cm], Z=10[cm], ${\alpha}$=4, notch=6[cm], critical current=12[A].

• 프린팅코리아
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• 통권33호
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• pp.146-149
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• 2005

다이커팅은 주로 프레젠테이션 접지물, CD/DVD 자켓, 라벨, 플레잉카드, 기프트카드, 마그넷카드 등에 응용되고 있다. 전세계적으로 유명한 유력 다이커터 제조업체인 밥스트, 브라우세, 브랜드젠&클루지, 산와와 그 외 다른 업체들은 엠비오, 롤렘, 스필, 비죽과 같은 업체들이 중형범위 시장을 목표로 하는 동안에도 대형 범위 시장에 활용되는 인쇄기들에 관심을 보여왔다. H.S.보이드와 프린트크래프트는 인쇄업체들이 이미 보유하고 있는 오프셋 인쇄기에 인라인으로 다이커팅 장비를 부가할 수 있는 시스템들을 제공한다. 하이델베르크는 스피드마스터SM52 인쇄기에 인라인 다이커팅 장비를 선택사양으로 장착, 중형 범위 시장을 공략할 뿐만 아니라 다이매트릭스, 카마 등의 장비를 통해서는 하이-엔드 작업 범위까지 공략하고 있다. 다이커팅은 폴딩(접지), 펀칭(타공), 글루잉(풀칠), 스코어링(꺽음줄매기기), 퍼핑(연속천공), 금박, 엠보싱 작업들과 결합된다.

• 한국해양공학회지
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• 제13권2호통권32호
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• pp.83-89
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• 1999

In this paper an experimental study on the development of the shielded metal are welding(SMAW) optimization technique for the dissimilar materials SS41 and STS304 of Auto-Lifting Magnet core plate was carried out. It was confirmed that the optimum welding heat input range was 37.5 to 45 kj/cm by considering on the strength and fatigue life of the welded joints more than 100% joint efficiency. And the quantitative relationship empirical wquation between the strength toughness adn fatigue life and the weld heat input was obtained.

• 전기학회논문지
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• 제60권4호
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• pp.753-758
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• 2011

Magnetic field and Electric field of High Temperature Superconducting magnet are very important to analysis of superconducting magnet. The maximum perpendicular magnetic field was applied to the outermost pancake windings. The critical current of all the magnet windings is limited by the critical current of the outermost pancake windings. The E-J relation was used to determine the critical current, and an evolution s trategy was adopted for the optimization of gap length between each pancake windins. The results of calculations show that the critical current and the central magnetic field and uniformity increased by 82.6% and 31.6% and 50.8%, respectively, for a magnet consisting of ten pancake windings. This paper did an analysis the cause of increase the critical current and central magnetic field and uniformity in no gap and optimal gap model.

• 한국초전도ㆍ저온공학회논문지
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• 제12권1호
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• pp.17-21
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• 2010

In the case of designing superconducting power apparatuses using the second generation high temperature superconducting wire, it is necessary to have a tape-splicing technique to achieve low splice resistance between coated conductor (CC) tapes. In this paper, an experimental splice method between YBCO CC tapes is proposed for a coil application. Splices were performed with a 37Pb-63Sn solder. YBCO samples were fabricated with various pressures and cooling rates. Joint resistances of the spliced samples of jointed YBCO CC tapes were measured and evaluated from V-I curves. In addition, optical micrographs were obtained to analyze the cross sectional microstructure of jointed samples.

• 풍력에너지저널
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• 제5권1호
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• pp.50-55
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• 2014

Surface Permanent-Magnetic-Synchronous-Generator (SPMSG) discussed in the present study has operational characteristics such as high rotational speed over 1,000 rpm and centrifugal force of 12 kN·m for each magnet. Structure-development analysis for the minimization of rotor-core weights and the maximization of thermal emission is performed by applying the aluminum-laminated cap which combines the advantages of IPM and SPM in order to overcome the difficulty that attaching the magnet to rotor-core only with an adhesive. In this study, the simulations in terms of structure and electromagnetic were performed with the variable parameters such as shape and thickness of laminated-cap and division method of magnet. As a result, condition for minimized centrifugal force with minimum loss is derived.

• 한국산학기술학회논문지
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• 제13권10호
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• pp.4751-4756
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• 2012

브러쉬형 모터는 여러 가지 전기기계 및 가전제품에서 미세먼지와 유해물질을 발생시키는 것으로 알려졌다. 그래서 브러쉬가 없는 형태의 모터가 브러쉬형 모터를 대신하여 친환경적인 대안으로 제안되었다. 또한 BLDC 모터의 값비싼 마그넷 회전자는 SRM형으로 대치되고 있는데 SRM은 시스템의 허용범위 내에서 전류값이 넘지 않도록 해야하는 제어를 요구한다. 본 논문에서는 SRM형 BLDC 모터를 사용하여 고속회전을 제어하기위한 경제적인 제어기와 효율적인 접근방법을 소개한다.

• 한국실내디자인학회논문집
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• 제19권2호
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• pp.155-162
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• 2010

Shopping became a meaning of simply buying goods and service as well as buying place and cultural experiences to people living nowaday. Many people make an appointment, watch movies and enjoy shopping in shopping malls. This Change of meaning of shopping made shopping center to be a place for pubic space gradually. Although shopping mall, a type of shopping center, existed from the past, contemporary shopping mall that is enclosed from air started to be established in 1950's in North America. After that lifestyle and shopping environment having been changed continuously and shopping mall in terms of architectural typology has been changed as well. Now shopping mall provides leisure and entertainment to people and also is playing an important role as redeveloping a city and revitalizing a town. This study will take a look at changes of typology of out-of-town regional shopping mall in north America and analyze reasons and characteristics of changes since 1960's shopping malls. The purpose of this study is to categorize the type of out-of-town regional shopping mall and to find application method in shopping mall design in Korea.