Title :
A transformerless step-up dc-dc converter with high voltage gain and reduced voltage stresses on semiconductors
Author :
Hosseini, Seyed Hossein ; Nouri, Tohid
Author_Institution :
Dept. of Electr. Eng., Islamic Azad Univ., Tabriz, Iran
Abstract :
This paper proposes a new transformerless dc-dc converter with high voltage gain and reduced voltage stress on the semiconductors. The proposed converter uses two units of diode-capacitor-inductor (D-C-L) at input stage and two voltage multiplier cells at output side. Both of the D-C-L units and the voltage multiplier cells increase the voltage conversion ratio. One of the main features of the proposed converter is that the current stress is distributed among the diodes at D-C-L units. At fixed voltage gain, this reduces the current stress through these semiconductors. Voltage multiplier cells reduce the voltage stress across the main switch and other semiconductors. In such situations, semiconductors with lower RDS-ON and lower forward voltage drop can be used that leads to higher efficiencies. Simulation results in PSCAD/EMTDC prove the theoretical analysis and the satisfying operation of the proposed converter.
Keywords :
DC-DC power convertors; capacitors; inductors; semiconductor diodes; voltage multipliers; D-C-L units; PSCAD-EMTDC; diode-capacitor-inductor unit; forward voltage drop; high voltage gain; reduced voltage stresses; transformerless step-up DC-DC converter; voltage conversion ratio; voltage multiplier cells; Capacitors; Inductors; PSCAD; Semiconductor diodes; Simulation; Stress; Switches; Step-up DC-DC converter; reduced voltage stress; voltage multiplier cells;
Conference_Titel :
Universities Power Engineering Conference (UPEC), 2012 47th International
Conference_Location :
London
Print_ISBN :
978-1-4673-2854-8
Electronic_ISBN :
978-1-4673-2855-5
DOI :
10.1109/UPEC.2012.6398609