지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Fly-back type SMPS (Switching-Mode-Power-Supply) has been used on many area for its simplicity and reliability. The resonant switch is adopted to reduce its size and losses.
Flyback type ZVS-QRC(Zero-Voltage-Switching-Quasi-Resonant-Converter) has 4 operation modes due to its switching conditions. State equation can be derived by the state space averaging method. It has zero in RHP(Right-Half-Plane). The zero in RHP makes the system response tardy or unstable when we construct the closed loop system.
The Smith predictor is used to compensate the zero in RHP. Therefore the ZVS-QRC fly-back system can be converted to minimum phase system with first order all pass filter by Pade approximation. A PI controller is designed for regulating output voltage.
Simulation has been performed in order to show the effectiveness of the algorithm.
Flyback type ZVS-QRC(Zero-Voltage-Switching-Quasi-Resonant-Converter) has 4 operation modes due to its switching conditions. State equation can be derived by the state space averaging method. It has zero in RHP(Right-Half-Plane). The zero in RHP makes the system response tardy or unstable when we construct the closed loop system.
The Smith predictor is used to compensate the zero in RHP. Therefore the ZVS-QRC fly-back system can be converted to minimum phase system with first order all pass filter by Pade approximation. A PI controller is designed for regulating output voltage.
Simulation has been performed in order to show the effectiveness of the algorithm.
목차
Abstract
1.Introduction
2.ZVS-QR Flyback SMPS
3.Compensator Design
4.Example
5.Simulation
6.Conclusion
Reference
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