Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Input-Series Multiple-Output Auxiliary Power Supply Scheme Based on Transformer-Integration for High-Input-Voltage Applications

  • Meng, Tao (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Ben, Hongqi (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Wei, Guo (School of Electrical Engineering and Automation, Harbin Institute of Technology)
  • Received : 2011.12.10
  • Published : 2012.05.20
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Abstract

In this paper, an input-series auxiliary power supply scheme is proposed, which is suitable for high input voltage and multiple-output applications. The power supply scheme is based on a two-transistor forward topology, all of the series modules have a common duty ratio, all the switches are turned on and off simultaneously, and the whole circuit has a single power transformer. It does not require an additional controller but still achieves efficient input voltage sharing (IVS) for each series module through its inherent transformer-integration strategy. The IVS process of this power supply scheme is analyzed in detail and the design considerations for the related parameters are given. Finally, a 100W multiple-output auxiliary power supply prototype is built, and the experimental results verify the feasibility of the proposed scheme and the validity of the theoretical analysis.

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References

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