Title :
Low-loss converters with high step-up conversion ratio working at the border between continuous and discontinuous mode
Author :
Himmelstoss, Felix A. ; Wurm, Peter H.
Author_Institution :
Inst. of Power Electron., Tech. Univ. Wien, Austria
Abstract :
The use of tapped inductors in the classical boost or buck-boost converter leads to a high step-up ratio thus avoiding the extreme duty cycles of the active switch and the high peak currents in the active and passive switches. Two converters are presented and analyzed. Due to the simultaneous regulation of the switching frequency and the duty cycle on one hand and the winding ratio of an autotransformer on the other, high conversion rates of 1:5 can easily be realized. The dimensioning of the converters, their dynamical behavior, and the component stresses are analyzed
Keywords :
DC-DC power convertors; losses; power inductors; boost converter; buck-boost converter; component stresses; continuous mode; conversion rates; discontinuous mode; duty cycle; dynamical behavior; low-loss converters; simultaneous regulation; step-up conversion ratio; switching frequency; tapped inductors; winding ratio; Coupling circuits; Diodes; Inductors; Magnetic cores; Magnetic flux; Stress; Switches; Switching converters; Switching frequency; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on
Conference_Location :
Jounieh
Print_ISBN :
0-7803-6542-9
DOI :
10.1109/ICECS.2000.912982
