Large-signal stability of PWM switching regulators

Author

Chung, H. ; Ioinovici, A.

Author_Institution

Dept. of Electr. Eng., Hong Kong Polytech., Hung Hom, Hong Kong

Volume

2

fYear

1995

fDate

30 Apr-3 May 1995

Firstpage

1123

Abstract

A method for finding the equilibrium points of closed-loop switching converters subjected to large-signal disturbances is developed. The position of the equilibrium points in the state-plane, in conjunction with the state-plane portrait, allow for the study of the stability of large-signal transients. For this purpose, a discrete-time model is formulated, starting from a time-domain analysis algorithm based on solving a set of algebraical modified nodal equations at each integration step. Due to the complexity of the formulas, the study of the large-signal stability is carried out here only for PWM converters operating in continuous conduction mode. An application to a boost regulator allows for favorably comparing our results to those available in literature

Keywords

PWM power convertors; closed loop systems; controllers; power system stability; power system transients; switched mode power supplies; time-domain analysis; voltage regulators; PWM switching regulators; boost regulator; closed-loop switching converters; continuous conduction mode; discrete-time mode; equilibrium points; large-signal transients; nodal equations; stability; state-plane; time-domain analysis; Capacitors; Circuits; Equations; Inductors; Power system modeling; Pulse width modulation; Regulators; Stability; Time domain analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

0-7803-2570-2

Type

conf

DOI

10.1109/ISCAS.1995.521610

Filename

521610