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A New High Voltage Gain Full Bridge Resonant Switched-Capacitor Converter
نویسندگان :
Sajad AfsharZarandi
1
Reza Beiranvand
2
1- دانشگاه تربیت مدرس
2- دانشگاه تربیت مدرس
کلمات کلیدی :
High step-up dc/dc converter،switched-capacitor converter (SCC)،resonant converter،zero-current switching (ZCS)،zero-voltage switching (ZVS)
چکیده :
A full-bridge resonant switched-capacitor converter (SCC) is introduced here for high-frequency and high-power applications. This structure guarantees low voltage stress on the power MOSFETs, high voltage gain, soft switching operation of the power switches, as well as ZVS turn on and ZCS turn off of all power diodes. Small input/output filters volumes are achieved, because the input current and output voltage waveforms ripples frequencies are twice the switching frequency, due to the symmetrical structure of the converter. A coupled-inductor has been used, which reduces the magnetic components count and volume that improves the converter power density. Also, different common control methods such as phase-shifted, frequency modulation, and PWM can be applied to well adjust the output voltage of the introduced structure, even when wide output load and input voltage variations are used to the topology. The given converter has a good performance above and below its resonant frequency. Therefore, the appropriate frequency region can be chosen according to the application and available power switches. Finally, simulation results are given here to adjust the output voltage at 400 V, when the input voltage and output power are changed in 20-40 V and 50-500 W wide ranges, respectively.
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