한국정밀공학회:학술대회논문집 (Proceedings of the Korean Society of Precision Engineering Conference)
- 한국정밀공학회 2005년도 춘계학술대회 논문집
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- Pages.284-288
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- 2005
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- 2005-8446(pISSN)
PLL기법에 기반한 PWM 컨버터 전원 위상각 검출에 관한 연구
A Study on the phase angle detection of power source for PWM converter based on PLL method
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Choi Cheol
(OTIS-LG Elevator) ;
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Lee Sang-Hun
(OTIS-LG Elevator) ;
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Kim Cheol-U
(Pusan National Univ.)
- 발행 : 2005.06.01
초록
This paper proposes the direct detection method of phase angle for the power source, which is based on the PLL method. The proposed method using a bidirectional photo-coupler is used to directly detect the zero crossing of phase voltage and calculate the angular frequency in the controller based on a M/T algorithm. Through the method, the additional installation space in the traditional method using a potential transformer can be minimized and it can be easy to design. The paper presents straightforward schematic circuits, design and experimental results.