• 제목/요약/키워드: Chun-Kwang

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Optical Power Transfer of Grating-Assisted Directional Coupler with Three-Guiding Channels: TM modes Case

  • 호광춘
    • 한국전자파학회:학술대회논문집
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    • 한국전자파학회 2003년도 종합학술발표회 논문집 Vol.13 No.1
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    • pp.126-130
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    • 2003
  • The optical power transfer of TM modes in grating-assisted directional couplers (GADCs) with three-guiding channels is rigorously evaluated by defining a novel coupling efficiency amenable to the rigorous analytical solutions of modal transmission-line theory (MTLT). The results reveal that the incident power is sensitively partitioned through three output channels in terms of such grating parameters as the period, the duty cycle, and wavelength.

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전류 제어기를 가지는 고성능 5상 스텝 모터 구동 드라이버 설계 (Design of High Performance 5 Phase Step Motor Drive System with Current Control Loop)

  • 천광수;김학진;권용관;강석희
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2006년도 전력전자학술대회 논문집
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    • pp.311-315
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    • 2006
  • This paper proposes 5 phase step motor drive system has high performance dynamics with micro step control has current controller. In this paper, analog current controller has been developed to minimize system size and cost. The validity of the proposed technique is verified through experimental results of position control robot.

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