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http://dx.doi.org/10.6113/JPE.2016.16.1.133

A Novel Five-Level Flying-Capacitor Dual Buck Inverter  

Liu, Miao (College of Electronic and Information Eng., Nanjing University of Aeronautic and Astronautics)
Hong, Feng (College of Electronic and Information Eng., Nanjing University of Aeronautic and Astronautics)
Wang, Cheng-Hua (College of Electronic and Information Eng., Nanjing University of Aeronautic and Astronautics)
Publication Information
Journal of Power Electronics / v.16, no.1, 2016 , pp. 133-141 More about this Journal
Abstract
This paper focuses on the development of a Five-Level Flying-Capacitor Dual Buck Inverter (FLFCDBI) based on the main circuit of dual buck inverters. This topology has been described as not having any shoot-through problems, no body-diode reverse recovery problems and the half-cycle work mode found in the traditional Multi-Level Flying-Capacitor Inverter (MLFCI). It has been shown that the flying-capacitor voltages of this inverter can be regulated by the redundant state selection within one pole. The voltage balance of the flying-capacitors can be achieved by charging or discharging in the positive (negative) half cycles by choosing the proper logical algorithms. This system has a simple structure but demonstrates improved performance and reliability. The validity of this inverter is conformed through computer-aided simulation and experimental investigations.
Keywords
Balancing capacitor voltage; Dual buck; Five-level inverter; Flying-capacitor;
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