Family of Dual-Input Dual-Buck Inverters Based on Dual-Input Switching Cells

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.

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Cite this article

[IEEE Style]

F. Yang, H. Ge, J. Yang, R. Dang, H. Wu, "Family of Dual-Input Dual-Buck Inverters Based on Dual-Input Switching Cells," Journal of Power Electronics, vol. 18, no. 4, pp. 1015-1026, 2018. DOI: 10.6113/JPE.2018.18.4.1015.

[ACM Style]

Fan Yang, Hongjuan Ge, Jingfan Yang, Runyun Dang, and Hongfei Wu. 2018. Family of Dual-Input Dual-Buck Inverters Based on Dual-Input Switching Cells. Journal of Power Electronics, 18, 4, (2018), 1015-1026. DOI: 10.6113/JPE.2018.18.4.1015.