Title :
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
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;
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
DOI :
10.1109/ISCAS.1999.777523
