Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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A New Soft Switching Step-Down/Up Converter with Inherent PFC Performance

  • Jabbari, Masoud (Dept. of Electrical and Computer Eng., Isfahan University of Technology (IUT)) ;
  • Farzanehfard, Hosein (Dept. of Electrical and Computer Eng., Isfahan University of Technology (IUT))
  • Published : 2009.11.20
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Abstract

In this paper a new buck-boost type DC-DC converter is presented. Its voltage gain is positive, all active elements operate under soft-switching condition independent of loading, magnetic isolation and self output short-circuit protection exist, and very fast dynamic operation is achievable by a simple bang-bang controller. This converter also exhibits appropriate PFC characteristics since its input current is inherently proportional to the source voltage. When the voltage source is off-line, it is sufficient to add an inductor after the rectifier, then near unity power factor is achievable. All essential guidelines to design the converter as a DC-DC and a PFC regulator are presented. Simulation and experimental results verify the developed theoretical analysis.

Keywords

References

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