Title :
An Improved Topology of SEPIC Converter With Reduced Output Voltage Ripple
Author :
Al-Saffar, Mustafa A. ; Ismail, Esam H. ; Sabzali, Ahmad J. ; Fardoun, Abbas A.
Author_Institution :
Dept. of Electr. Eng., Coll. of Technol. Studies, Al-Shaa´´b
Abstract :
An improved version of a single-ended primary inductor converter (SEPIC) is presented. The converter consists of a conventional SEPIC converter plus an additional high-frequency transformer and diode to maintain a freewheeling mode of the DC inductor currents during the switch on state. The voltage conversion ratio characteristics and semiconductor device voltage and current stresses are characterized. The main advantages of this converter are the continuous output current, smaller output voltage ripple, and lower semiconductors current stress compared with the conventional SEPIC converter. The design and simulation of the concept is verified by an experiment with a 48-V input and 12-V/3.75-A output converter.
Keywords :
DC-DC power convertors; high-frequency transformers; inductors; power semiconductor diodes; DC inductor currents; SEPIC converter; current 3.75 A; current stress; diode; freewheeling mode; high-frequency transformer; semiconductor device voltage; single-ended primary inductor converter; voltage 12 V; voltage 48 V; voltage conversion ratio; voltage ripple; Circuit topology; Coupling circuits; Electromagnetic compatibility; Filters; Inductors; Magnetic separation; Stress; Switches; Switching converters; Voltage; Active clamp; continuous conduction mode (CCM); dc–dc power conversion; ripple reduction; single-ended primary inductor converter (SEPIC);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2008.2001916
