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A High Performance Interleaved Bridgeless PFC for Nano-grid Systems

  • Cao, Guoen (Institute of Electrical Engineering, Chinese Academy of Sciences and Key Laboratory of Solar Thermal Energy and Photovoltaic System, Chinese Academy of Sciences) ;
  • Lim, Jea-Woo (Dept. of Electronic Systems Engineering, Hanyang University) ;
  • Kim, Hee-Jun (Dept. of Electronic Systems Engineering, Hanyang University) ;
  • Wang, Huan (Institute of Electrical Engineering, Chinese Academy of Sciences and Key Laboratory of Solar Thermal Energy and Photovoltaic System, Chinese Academy of Sciences) ;
  • Wang, Yibo (Institute of Electrical Engineering, Chinese Academy of Sciences and Key Laboratory of Solar Thermal Energy and Photovoltaic System, Chinese Academy of Sciences)
  • Received : 2016.11.02
  • Accepted : 2017.02.02
  • Published : 2017.05.01

Abstract

A high performance interleaved bridgeless boost power factor correction (PFC) rectifier operating under the critical current conduction mode (CrM) is proposed in this paper to improve the efficiency and system performance of various applications, such as nano-grid systems. By combining the interleaved technique with the bridgeless topology, the circuit contains two independent branches without rectifier diodes. The branches operate in interleaved mode for each respective half-line period. Moreover, when operating in CrM, all the power switches take on soft-switching, thereby reducing switching losses and raising system efficiency. In addition, the input current flows through a minimum amount of power devices. By employing a commercial PFC controller, an effective control scheme is used for the proposed circuit. The operating principle of the proposed circuit is presented, and the design considerations are also demonstrated. Simulations and experiments have been carried out to evaluate theoretical analysis and feasibility of the proposed circuit.

Keywords

References

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