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http://dx.doi.org/10.6113/JPE.2010.10.6.673

DSP Based Series-Parallel Connected Two Full-Bridge DC-DC Converter with Interleaving Output Current Sharing  

Sha, Deshang (School of Automation, Beijing Institute of Technology)
Guo, Zhiqiang (School of Automation, Beijing Institute of Technology)
Lia, Xiaozhong (School of Automation, Beijing Institute of Technology)
Publication Information
Journal of Power Electronics / v.10, no.6, 2010 , pp. 673-679 More about this Journal
Abstract
Input-series-output-parallel (ISOP) connected DC-DC converters enable low voltage rating switches to be used in high voltage input applications. In this paper, a DSP is adopted to generate digital phase-shifted PWM signals and to fulfill the closed-loop control function for ISOP connected two full-bridge DC-DC converters. Moreover, a stable output current sharing control strategy is proposed for the system, with which equal sharing of the input voltage and the load current can be achieved without any input voltage control loops. Based on small signal analysis with the state space average method, a loop gain design with the proposed scheme is made. Compared with the conventional IVS scheme, the proposed strategy leads to simplification of the output voltage regulator design and better static and dynamic responses. The effectiveness of the proposed control strategy is verified by the simulation and experimental results of an ISOP system made up of two full-bridge DC-DC converters.
Keywords
Current sharing; Digital control; Input-series and output-parallel; Modular DC/DC converters; Phase-shifted fullbridge; Voltage sharing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 5
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