Research on stability of buck converter with output-current-feedforward control

Author

Beibei Wang ; Pengyu Jia ; Zheng, Trillion Q. ; Yan Li

Author_Institution

Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China

fYear

2014

fDate

16-20 March 2014

Firstpage

2817

Lastpage

2821

Abstract

The method of using output-current-feedforward (OCFF) control to realize zero output impedance is widely applied in Buck converter. However, it is found that the converter may have stability problems with this method. The OCFF controller´s transfer functions of basic DC/DC converters are calculated when different current (inductor current, load current) feedforward control is used in this paper There is a negative feedback loop existing in this model as OCFF control is applied and this loop may cause instability. The system stability of Buck converter with different current feedforward control is analyzed. The theories are verified by simulation and experiment results of Buck converter.

Keywords

electric current control; electric impedance; feedforward; power convertors; stability; transfer functions; DC-DC converters; OCFF controller transfer functions; buck converter stability; impedance; negative feedback loop; output-current-feedforward control; DC-DC power converters; Feedforward neural networks; Impedance; Integrated circuits; Mathematical model; Stability analysis; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803703

Filename

6803703