Optimized on-off control to improve efficiency of paralleled converter system

Author

Kohama, Teruhiko ; Sogawa, Yuki ; Tsuji, Satoshi

Author_Institution

Dept. of Electr. Eng., Fukuoka Univ., Fukuoka, Japan

fYear

2014

fDate

Sept. 28 2014-Oct. 2 2014

Firstpage

1

Lastpage

7

Abstract

This paper proposes a controlling method to improve overall power conversion efficiency of paralleled converter system. The method controls the number of active modules to minimize power losses in paralleled system according to load current. Key point of the control is to determine the on-off points of converter modules. Method for determining optimized on-off switching points is shown by introducing simple point-estimating manner. Output voltage fluctuation due to the on-off control is also estimated with a simplified circuit model. Those estimations are verified by experiment and circuit simulation. Simple guideline for reduction of output voltage fluctuation is also described.

Keywords

DC-DC power convertors; electric current control; load regulation; on-off control; power control; switching convertors; voltage control; DC-DC converter; active module; load current; optimized on-off control; optimized on-off switching point estimation; output voltage fluctuation reduction; paralleled converter system power conversion efficiency improvement; power loss minimization; Current measurement; DC-DC power converters; Estimation; Integrated circuit modeling; Load modeling; Switches; DC-DC converter; improvement of efficiency; optimized on-off control; paralleled converter system;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference (INTELEC), 2014 IEEE 36th International

Conference_Location

Vancouver, BC

Type

conf

DOI

10.1109/INTLEC.2014.6972181

Filename

6972181