Single-Phase Inverter With Wide Input Voltage and Power Decoupling Capability

IEEE Access

Xiao Liang¹  Minghui Zheng²  Guo Xu³  Fulin Liu³  Mei Su³  Yonglu Liu³  Yao Sun³ 

[1] Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, USA;Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY, USA;School of Information Science and Engineering, Central South University, Changsha, China;

关键词: Active power decoupling;    closed-loop control;    low-frequency ripple power;    single-phase inverter;    wide input voltage;   

DOI  :  10.1109/ACCESS.2019.2895350

来源: DOAJ

【 摘 要 】

This paper proposes a single-phase inverter to achieve high power factor, wide input voltage range, and ripple power decoupling without using large passive components. The proposed inverter is obtained by rearranging the positions of the switches and passive components in the exiting circuit. Given that, a wider dc input voltage range can be obtained since it is no longer bounded by half the grid peak voltage. In addition, the inherent low-frequency ripple power is buffered, rather than through increasing the capacitance, by swinging the decoupling capacitor voltage resulting in an improvement of the power density and system lifetime. Furthermore, with adopting a closed-loop control method, no dedicated power-buffering controller is required. This paper starts with introducing the derivation of the proposed inverter followed by the operation principles and circuit analysis. A comparison between the derived circuit and the original one is carried out to show the pros and cons. Finally, a 200-W prototype is constructed to demonstrate the effectiveness of the proposed topology.

【 授权许可】

Unknown