Title :
Input filter interactions in current-mode controlled converters-a unified analysis approach
Author :
Suntio, Teuvo ; Gadoura, Idris ; Zenger, Kai
Author_Institution :
Electron. Lab., Oulu Univ., Finland
Abstract :
A unified analysis approach in assessing the effect of an input filter on the performance of a current-mode controlled converter is presented. The analysis method is based on the use of two-port unterminated modeling technique. The describing formulas to assess the input-filter effect are presented based on the transfer functions of direct-duty-ratio control with modifications caused by the effect of inductor-current feedback in peak-current control. The analysis shows that the behavior of input impedance explains the phenomena noticed earlier.
Keywords :
electric current control; equivalent circuits; feedback; filters; inductors; power convertors; transfer functions; two-port networks; current-mode controlled converters; direct-duty-ratio control; equivalent circuit; inductor-current feedback; input filter interactions; input impedance behaviour; input-filter effect; peak-current control; transfer functions; two-port unterminated modeling technique; unified analysis approach; Buck converters; Electromagnetic interference; Feedback; Filters; Inductors; Laboratories; Performance analysis; Phase change materials; Switching converters; Transfer functions;
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
DOI :
10.1109/IECON.2002.1185440
