Sampled-data modeling and analysis of closed-loop PWM DC-DC converters

Author

Fang, Chung-Chieh ; Abed, Eyad H.

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

Volume

5

fYear

1999

fDate

1999

Firstpage

110

Abstract

General block diagram models are proposed for PWM DC-DC converters in continuous and discontinuous conduction modes with fixed switching frequency. Both current mode control and voltage mode control are addressed in these models. Based on these models, detailed nonlinear and linearized sampled-data dynamics are derived. Asymptotic orbital stability is analyzed. Audio-susceptibility and output impedance are derived. In this approach, discontinuous conduction mode and current mode control can be analyzed systematically without special effort

Keywords

DC-DC power convertors; PWM power convertors; asymptotic stability; circuit stability; closed loop systems; electric impedance; nonlinear network analysis; sampled data systems; switching circuits; asymptotic orbital stability; audio-susceptibility; block diagram models; closed-loop PWM DC-DC converters; continuous conduction mode; current mode control; discontinuous conduction mode; fixed switching frequency; linearized sampled-data dynamics; nonlinear sampled-data dynamics; output impedance; sampled-data analysis; sampled-data modeling; voltage mode control; Asymptotic stability; Control systems; DC-DC power converters; Impedance; Pulse width modulation; Pulse width modulation converters; Stability analysis; Switching converters; Switching frequency; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.777523

Filename

777523