• 제목/요약/키워드: Chang-Won Lee

검색결과 6,368건 처리시간 0.04초

새로운 영구자석 배열에 의한 X-Y평면 모터의 특성해석 (The Characteristics Analysis of X-Y Planar Motor with New Permanent Magnet Array)

  • 황예;이동엽;김규탁
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.124-126
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    • 2006
  • In this paper, a synchronous permanent magnet planar motor (SPMPM) with new permanent magnet array is proposed and the magnetic field distribution is obtained analytically by using magnetic scalar potential. Compared to those of Asakawa, Chitayat and experimental data, the superiority and feasibility of the novel magnet array are verified. The characteristics of the synchronous permanent magnet planar motor with this novel magnet array such as inductance, back-EMF, and force are calculated by analytical method.

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가동 코일형 영구자석 선형 동기전동기의 성능 향상에 관한 연구 (A study of performance improvement for moving coil type Permanent Magnet Linear Synchronous Motor)

  • 이동엽;장기봉;김규탁
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.116-118
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    • 2007
  • In this paper, the notch of teeth, the shape changing and skew of permanent magnet are used to reduce the detent force. And addition, overhang of permanent magnet is applied to increase thrust because thrust is decreased by skew. As the results, detent force is decrease greatly about 98(%). And, the ripple ratio of thrust is decreased from 11.34(%) to 0.25(%).

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MPLS 네트워크에서 Diffserv 제공 방안에 대한 연구 (A Study on Providing Differentiated Services in MPLS Networks)

  • 송용주;이광휘;김한경
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2001년도 춘계학술발표논문집 (하)
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    • pp.631-634
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    • 2001
  • 버스트(Burst)한 트래픽에 대해 QoS 를 보장하는 것은, 사용자의 경우 최대한의 서비스 보장을 받으려는 반면 사업자의 경우는 회선에 대한 최대한의 multiplexing 이득을 통해 자원활용의 극대화를 요구하기 때문에 적절한 타협점을 찾는 것이 용이하지 않다. 본 논문에서는 사용자와 공급자의 요구를 최대한 수용할 수 있는 서비스에 대해 논증하고 이를 적절하게 수용할 수 있는 MPLS 시스템을 설계해보고자 한다.

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아조벤젠기를 가지는 지방산과 인지질의 혼합물에 대한 광이성화 현상 및 물성에 관한 연구 (A Study on the Photoisomerization and Physical Properties for Mixtures of Phospholipid and Fatty Acid containing Azobenzene)

  • 박근호;이수;변용진
    • 한국응용과학기술학회지
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    • 제16권4호
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    • pp.281-286
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    • 1999
  • We carried out this subject to observe photoisomerization using 8A5H and phospholipid(DLPC) containing azobenzene group which has reversible to cis-trans by light irradiation. We investigated the photoisomerization and property of the monolayer film on quartz substrate prepared by the mixture of 8A5H and phospholipid deposited using Langmuir-Blodgett(LB) method. It was found that the absorption spectrum of the 8A5H and phospholipid LB monolayer was induced to photoisomerization by alternate light irradiation. And the absorbance of both the solution of mixtures of 8A5H-phospholipid and LB film was reversibly changed by the acid-base exposure and alternate temperatures.