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

Volume

2

fYear

2000

fDate

2000

Firstpage

734

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on

Conference_Location

Jounieh

Print_ISBN

0-7803-6542-9

Type

conf

DOI

10.1109/ICECS.2000.912982

Filename

912982