DSP Based Control of Parallel DC-DC Buck Converters by Optimal Multi-Input Multi-Output Discrete Integral Variable Structure Control Scheme

Author

Yin, Li-Peng ; Cheng, Chi-Cheng ; Chuang, Chin-Wen ; Chen, Cheng-Yi

Author_Institution

Dept. of Mech. & Electro-Mech. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

fYear

2009

fDate

7-9 Dec. 2009

Firstpage

922

Lastpage

925

Abstract

A new control scheme for current distribution in parallel connected DC-DC converters is presented. It uses an optimal multi-input multi-output (OMIMO) discrete integral variable structure controller (DIVSC) to achieve both output current equalization and output voltage regulation. The controller improves the dynamic performance of a parallel buck converter; the output voltage is robust against load disturbances and the output currents are very well equalized. The analysis and design of the controller is developed. Automatic master slave method is adopted in this work. DSP based experimental results show good dynamic performance of the proposed control scheme.

Keywords

DC-DC power convertors; MIMO systems; discrete systems; optimal control; variable structure systems; DSP based control; automatic master slave method; optimal discrete integral variable structure control scheme; optimal multiinput multioutput control scheme; parallel DC-DC buck converters; Automatic control; Buck converters; Current distribution; DC-DC power converters; Digital signal processing; Electric variables control; Mechanical variables control; Optimal control; Sliding mode control; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Innovative Computing, Information and Control (ICICIC), 2009 Fourth International Conference on

Conference_Location

Kaohsiung

Print_ISBN

978-1-4244-5543-0

Type

conf

DOI

10.1109/ICICIC.2009.179

Filename

5412317