QFT based robust controller design for a DC-DC switching power converter

Author

Altowati, Ali ; Zenger, Kai ; Suntio, Teuvo

Author_Institution

Helsinki Univ. of Technol., Espoo

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

11

Abstract

In this paper, a quantitative feedback theory (QFT) was applied successfully to design a robust controller for a DC-DC buck converter operating in continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The controller is designed to provide optimum attenuation of the load disturbances in spite of practical limitations on the achievable closed-loop performance and in the presence of other design constraints including closed-loop tracking and robust stability. The derived analytical results are verified by computer simulation of a voltage-mode (VM) controlled buck converter.

Keywords

DC-DC power convertors; closed loop systems; control system synthesis; robust control; voltage control; DC-DC switching power converter; QFT-based robust controller design; closed-loop performance; closed-loop tracking; continuous conduction mode; discontinuous conduction mode; load disturbances; optimum attenuation; quantitative feedback theory; robust stability; voltage-mode controlled buck converter; Attenuation; Buck converters; Computer simulation; DC-DC power converters; Feedback; Robust control; Robust stability; Switching converters; Virtual manufacturing; Voltage control; DC-DC Converter; Quantitative feedback theory; robust stability; voltagemode-control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417775

Filename

4417775