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New Method to Improve Stability of Output Pulse of Flyback Charging Modulator


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New Method to Improve Stability of Output Pulse of Flyback Charging Modulator
LV Fu-yong1LI Yong-xin1BU Xiong-zhu1WANG Qin2
1.School of Mechanical Engineering,NUST,Nanjing 210094,China;2.College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
flyback charging modulators output pulses series resonance synchronism charge stability
Operational principles of the flyback charging modulator are analyzed and the facors influencing the stability of the adjacent output pulse are studied.A topology of synchronization charge pre-regulated voltage with small power current source in series is proposed,which apparently improves the stability of the adjacent output pulse with low power.The half-bridge series resonant current source realizable circuit is presented and its operation principle and timing logic and the design of the key parameters are introduced.The circuit has high stability of the adjacent output pulse and the stability is improved to 10-5.The results show that the power of pre-regulated voltage is small and the maximal power is about 21.3% of the output power of the system.


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Last Update: 2012-12-19