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Digital control and transform function of pulse frequency modulated full bridge DC/DC converter with series boost capacitor.

Author(s)
Hamed Dehghani Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
Seyed Hossein Hosseinian Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
Behrooz Vahidi Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
Narges Dehghani Department of Electrical Engineering, Kurdistan University, Sanandaj, Iran
Abstract
The Full Bridge DC/DC Converters have several topologies, each of them has features and disadvantages. From all of them Zero-Voltage Switching Phase-Shifted Full-Bridge (ZVS-PS-FB) DC/DC converters take considerable attentions .Large magnitude of free-wheeling current in interruption time, so losses increased and efficiency decreased. Using Pulse Frequency Modulation (PFM) and Series Boost Capacitor (SBC) interruption time eliminated, so efficiency increased and losses decreased. In this paper proposed to derive the transfer function from the state space to study the PFM-SBC converter and design controller. Using digital cont roller which is implemented by DSP decrease the system overshoot, improve circuit response time consequently better stability. To confirm operations experimental and analysis results presented.
Publication Details
Page(s) 707-711
DOI DOI not available
Published Journal: Science International, Volume: 25, Issue: 4, Year: 2013

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