Asymmetric Snubberless Current-Fed Full-B Converters

Electrical, Control and Communication Engineering 2018
Roman Kosenko, Andrei Blinov, Dmitri Vinnikov, Andrii Chub

This paper presents two isolated current-fed fullbridge DC-DC converters that can be used to interface a lower voltage source into a DC bus of higher voltage. The first topology uses a resonant circuit to force current redistribution between low-voltage-side transistors and a passive rectifier. The second topology utilizes an active rectifier with secondary modulation to achieve the same goal. The resonant circuit can be formed by using transformer leakage inductance and the parasitic capacitances of the switches. The converters feature soft switching of semiconductors over a wide range of operating conditions. This is achieved with decreased energy circulation when compared to existing topologies with symmetric control and with fewer semiconductors than in those with phase-shift control. The topologies can be implemented in renewable, supercapacitor, battery, fuel cell, and DC microgrid applications. Steady-state operation and design aspects of the converters are presented and verified experimentally with 400 W prototypes.

Keywords
This paper presents two isolated current-fed fullbridge DC-DC converters that can be used to interface a lower voltage source into a DC bus of higher voltage. The first topology uses a resonant circuit to force current redistribution between low-voltage-side transistors and a passive rectifier. The second topology utilizes an active rectifier with secondary modulation to achieve the same goal. The resonant circuit can be formed by using transformer leakage inductance and the parasitic capacitances of the switches. The converters feature soft switching of semiconductors over a wide range of operating conditions. This is achieved with decreased energy circulation when compared to existing topologies with symmetric control and with fewer semiconductors than in those with phase-shift control. The topologies can be implemented in renewable, supercapacitor, battery, fuel cell, and DC microgrid applications. Steady-state operation and design aspects of the converters are presented and verified experimentally with 400 W prototypes.
DOI
10.2478/ecce-2018-0001
Hyperlink
https://content.sciendo.com/view/journals/ecce/ecce-overview.xml

Kosenko, R., Blinov, A., Vinnikov, D., Chub, A. Asymmetric Snubberless Current-Fed Full-B Converters. Electrical, Control and Communication Engineering, 2018, 14, pp.5-11. ISSN 2255-9140. e-ISSN 2255-9159. Available from: doi:10.2478/ecce-2018-0001

Publication language
English (en)