Modeling and controller design of a current-mode controlled converter

Author

Liaw, C.M. ; Chiang, S.J. ; Lai, C.Y. ; Pan, K.H. ; Leu, G.C. ; Hsu, G.S.

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

41

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

231

Lastpage

240

Abstract

In this paper, the reduced-order dynamic modeling and controller design of a push-pull DC-DC converter with current-mode control are presented. First, the small-signal equivalent circuit of the converter and its corresponding transfer function model are found. Then the selection of slope compensation and the model reduction are performed using the concept of dominant energy mode. Based on the reduced converter models, a quantitative design procedure is derived to find the parameters of the closed-loop controller such that the prescribed regulating specifications can be matched. Theoretic bases, the design and implementation of the proposed controller are described in detail. The performance of the converter and the validity of the proposed controller are demonstrated by some simulation and experimental results.

Keywords

closed loop systems; control system synthesis; controllers; electric current control; equivalent circuits; power convertors; transfer functions; closed-loop controller; controller design; current-mode controlled converter; dominant energy mode; model reduction; push-pull DC-DC converter; quantitative design procedure; reduced-order dynamic modeling; slope compensation; small-signal equivalent circuit; transfer function model; Circuit stability; Current supplies; DC-DC power converters; Equivalent circuits; Inductors; Power supplies; Pulse width modulation; Reduced order systems; Switches; Switching circuits; Transfer functions;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.293884

Filename

293884