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윤경섭,이무영,김우현,권우현 ( Kyung Sup Yoon,Moo Young Lee,Woo Hyun Kim,Woo Hyen Kwon ) 한국센서학회 1997 센서학회지 Vol.6 No.4
The measure of motor speed using encoder is difficult to detect accurate speed and direction in very low speed because the intervals between an encoder pulse and pulse are long. So various speed estimation techniques were proposed to have the good dynamic performance in low speed. And direction detection is so important as speed measurement in very low speed. But because the conventional direction detection circuit check the direction only 1 time in 1 period of each encoder pulses, so it has long delayed detection time in very low speed, thus accurate detection of direction is difficult. In this paper, we propose a 2 way edge det~tion method which can detect at the rising and falling edge of each encoder pulses. So it can check the direction 4 times in I period of each encoder pulses. Therefore if we use proposed method, we can reduce the detection time as 1/4 than that of conventional circuit and can detect more accurate speed and direction. And computer simulation and experiment is performed to verify the perfomance and effect of proposed circuit and we analyze it`s results by comparing with that of conventional circuit.
1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계
조내수(Nae-Soo Cho),최연호(Youn-Ho Choi),윤경섭(Kyung-Sup Yoon),구본호(Bon-Ho Koo),권우현(Woo-Hyen Kwon) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred. The Soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS: Zero Voltage Switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with 1st order delay circuit and logic elements. The realization of this method is so simple and cheap. The effectiveness of the proposed circuit is verified by experimental results.
MOSFET 대용량 펄스 정류기 구현을 위한 제어기 설계
선덕한(Duk-Han Sun),조내수(Nae-Soo Cho),윤경섭(Kyung Sup Yoon),김우현(Woo Hyun Kim),권우현(Woo Hyen Kwon) 대한전기학회 2008 정보 및 제어 심포지엄 논문집 Vol.2008 No.1
도금 산업 분야에 이용되는 펄스 정류기의 경우 정밀한 도금을 위해 큰 용량에 오버슈트가 전혀 없는 아주 빠른 시스템 응답 특성을 요구한다. 이러한 특성을 만족시키기 위한 방안으로 ITAE 성능지수를 이용한 PID 제어기 설계 방법을 시스템에 적용하여 PID 제어기의 K<SUB>D</SUB>, K<SUB>P</SUB>, K<SUB>I</SUB>을 찾는 과정을 알아보며, 선택된 제어 요소에 따라 시스템의 응답특성이 어떻게 변화되는지 모의실험을 통해 살펴본다.
1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계 (pp.160-161)
조내수(Nae-Soo Cho),최연호(Youn-Ho Choi),윤경섭(Kyung-Sup Yoon),구본호(Bon-Ho Koo),권우현(Woo-Hyen Kwon) 대한전기학회 2009 정보 및 제어 심포지엄 논문집 Vol.2009 No.10
The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred, The soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS : zero voitage switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with delay circuit. The realization of this method is so simple and cheap.