• 제목/요약/키워드: Choi Chang Hak

검색결과 278건 처리시간 0.028초

이하선암 85예에 대한 분석

  • 서진학;장한정;정웅윤;최은창;박정수
    • 대한두경부종양학회:학술대회논문집
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    • 대한두경부종양학회 2001년도 제18차 학술대회
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    • pp.269-269
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    • 2001

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3차원(次元) 전류좌표(電流座標)에 의한 능동전력(能動電力)필터의 보상성능(補償性能) 평가(評價)를 위한 시뮬레이터 개발(開發) (Simulator Development for Evaluating Compensation Performance. of Active Power Filter using Three-Dimensional Space Current Co-ordinate)

  • 임영철;정영국;나석환;최찬학;장영학
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.337-341
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    • 1994

  • This paper describes an effort to develop a simulator of Active Power Filter (APF) by three dimentional(3-D) space current co-ordinate. System current is represented by 3-D vector composed of three current components - active, reactive and distorted. %THD (%Total Harmonics Distortion) can be converted to height-angle of system current vector and power factor can be defined on 3-D space current co-ordinate without loss of generality. Current of APF and power system can be analyzed by 3-D visualization of current vector trajectory. So, the computer simulation results show that the proposed method by 3-D space current co-ordinate make up for disadvantages of performance evaluation on time / frequency domain.

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