Stability mechanism analysis of input-series and output-parallel connected DC-DC converters

Author

Li, Kai ; Sha, Deshang

Author_Institution

Dept. of Comput. Sci. & Technol., Suqian Coll., Suqian, China

fYear

2012

fDate

23-25 March 2012

Firstpage

109

Lastpage

111

Abstract

Input-series and output-parallel (ISOP) connected DC-DC converters are suitable for high voltage input and high current output applications by using low voltage rating switches. Cross feedback output current sharing (CFOCS) control can realize the power balance between each module easily and effectively. This paper describes the stability mechanism analysis of the CFOCS control based on small signal-model, and the Routh-Hurwitz criterion. The effectiveness of the analysis is verified by experimental results of a 150W ISOP system consisting of two two-transistor-forward (TTF) DC-DC converters.

Keywords

DC-DC power convertors; circuit stability; electric current control; switches; CFOCS control; ISOP connected DC-DC converters; Routh-Hurwitz criterion; TTF DC-DC converters; cross feedback output current sharing control; input-series-output-parallel connected DC-DC converters; low voltage rating switches; power 150 W; power balance; small signal-model; stability mechanism analysis; two-transistor-forwardnDC-DC converters; Analytical models; Arrays; Equivalent circuits; Inductors; Polynomials; Stability criteria;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Science and Technology (ICIST), 2012 International Conference on

Conference_Location

Hubei

Print_ISBN

978-1-4577-0343-0

Type

conf

DOI

10.1109/ICIST.2012.6221617

Filename

6221617