Title :
Improved ZVS DC-DC Converter With a High Voltage Gain and a Ripple-Free Input Current
Author_Institution :
Seoul Nat. Univ. of Sci. & Technol., Seoul, South Korea
fDate :
4/1/2012 12:00:00 AM
Abstract :
An improved zero-voltage-switching (ZVS) dc-dc converter with a high voltage gain and a ripple-free input current is proposed. It consists of two converter cells - a boost cell and an asymmetrical pulse-width-modulation (APWM) full-bridge cell. The boost cell in the proposed converter has the capabilities of providing a ripple-free input current. The APWM full-bridge cell provides a high voltage gain. The output diodes are under zero-current-switching (ZCS) during turn-off. The proposed converter has high efficiency due to soft-switching operation in full-bridge switches. Steady-state analysis of the converter is presented to determine the circuit parameters. A laboratory prototype of the proposed converter is developed, and its experimental results are presented for validation.
Keywords :
DC-DC power convertors; PWM power convertors; switching convertors; zero current switching; zero voltage switching; APWM full-bridge cell; ZCS; ZVS DC-DC converter; asymmetrical pulse-width-modulation full-bridge cell; high voltage gain; ripple-free input current; steady-state analysis; zero-current-switching; zero-voltage-switching DC-DC converter; Capacitance; Capacitors; Fuel cells; Inductance; Inductors; Switches; Zero voltage switching; High voltage gain; soft-switching; step-up converter; zero-current-switching; zero-voltage-switching;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2011.2169741
