Digital Control Strategy for Input-Series-Output-Parallel Modular DC/DC Converters
- Resource Type
- Academic Journal
- Authors
- Deshang Sha; Zhiqiang Guo; Xiaozhong Liao
- Source
- JOURNAL OF POWER ELECTRONICS. 2010-05 10(3):245-250
- Subject
- Digital control
Forward DC/DC
Input-series and output-parallel
Modular DC/DC converters
Voltage sharing
- Language
- Korean
- ISSN
- 1598-2092
2093-4718
Input-series-output-parallel (ISOP) converters consisting of multiple modular DC/DC converters can enable low voltage rating switches to be used under high voltage input applications. This paper presents a digital control strategy, which can achieve equal sharing of input voltage for a modular ISOP system consisting of two-transistor forward DC/DC converters by forcing the input voltages of neighboring modules to be equal. The proposed scheme is analyzed using small signals analysis based on the state space average method. The performance of the proposed control strategy is verified with an experimental prototype of an ISOP converter made up of three two-switch forward converters.