Title :
Improving efficiency of the active-clamped SEPIC rectifier at high line frequencies
Author :
Athalye, Praneet ; Maksimovic, Dragan ; Erickson, Robert
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO
Abstract :
The performance of a conventional isolated SEPIC rectifier can be improved with an active voltage clamp. Relatively high efficiency and low total harmonic distortion (THD) can be achieved with an active-clamped SEPIC rectifier in high-line-frequency (360-800 Hz) avionics applications. However, it is observed that a diode conduction problem affects the rectifier efficiency as the line frequency increases. This paper explains the diode conduction problem and presents a solution that is based on a variation of the same topology. An efficiency of 90% has been achieved for a power level of 100 W over the entire line frequency range. Additionally, the solution offers the possibility of high-voltage bulk energy storage
Keywords :
avionics; diodes; energy storage; harmonic distortion; power factor correction; rectifying circuits; 100 W; 360 to 800 Hz; THD; active voltage clamp; active-clamped SEPIC rectifier; avionics; diode conduction; high line frequencies; high-voltage bulk energy storage; rectifier efficiency; total harmonic distortion; Aerospace electronics; Clamps; Diodes; Energy storage; Frequency; Power electronics; Rectifiers; Switches; Topology; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1453143
