공진형 전력변환기를 위한 Phase-Locked Loop (PLL)의 특성 해석 = Characteristics of Phase-Locked Loop for resonant converter

다국어 초록 (Multilingual Abstract)

For high efficiency and low noise operation of power converters, soft switching strategies are required. The resonant converters and/or inverters are suitable candidates for these purpose. Generally the PLL(Phase-Locked Loop) techniques are employed to make the switching frequency of resonant converters follow the resonant frequency which may vary due to the load variations. The conventional design guide of PLL is not suitable in these cases since the characteristics of converters or inverters are not considered. In this paper, the phase characteristics of a resonant inverter is analysed and added to the closed loop. And the design of PLL with digital phase detector is illustrated for the output frequency to track the resonant frequency of the inverter. The validity of the proposed scheme is verified by PSPICE simulation for the PLL system.

목차 (Table of Contents)

• 1.서론
• 2.PLL 시스템의 구성과 특성
• 2.1 PLL의 구성요소
• 2.2 구성요소의 특성과 모델링
• 2.3 공진주파수 추적시스템
• 3.인버터의 위상 모델
• 3.1 공진형 인버터의 동작 특성
• 3.2 인버터의 위상 특성의 모델링
• 4.PLL 시스템의 설계 예
• 5.PSPICE 시뮬레이션 및 결과 검토
• 5.1 PSPICE 시뮬레이션 회로
• 5.2 시뮬레이션 결과 검토
• 6.결론
• 참고문헌