Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Family of Dual-Input Dual-Buck Inverters Based on Dual-Input Switching Cells

  • Yang, Fan (College of Automation Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Ge, Hongjuan (College of Automation Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Yang, Jingfan (College of Automation Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Dang, Runyun (College of Automation Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Wu, Hongfei (College of Automation Engineering, Nanjing University of Aeronautics and Astronautics)
  • Received : 2017.02.15
  • Accepted : 2018.03.01
  • Published : 2018.07.20
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Abstract

A family of dual-DC-input (DI) dual-buck inverters (DBIs) is proposed by employing a DI switching cell as the input of traditional DBIs. Three power ports, i.e. a low voltage DC input port, a high voltage DC input port and an AC output port, are provided by the proposed DI-DBIs. A low voltage DC source, whose voltage is lower than the peak amplitude of the AC side voltage, can be directly connected to the DI-DBI. This supplies power to the AC side in single-stage power conversion. When compared with traditional DBI-based two-stage DC/AC power systems, the conversion stages are reduced, and the power rating and power losses of the front-end Boost converter of the DI-DBI are reduced. In addition, five voltage-levels are generated with the help of the two DC input ports, which is a benefit in terms of reducing the voltage stresses and switching losses of switches. The topology derivation method, operation principles, modulation strategy and characteristics of the proposed inverter are analyzed in-depth. Experimental results are provided to verify the effectiveness and feasibility of the proposed DI-DBIs.

Keywords

References

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