Large-signal analysis and control of buck converters loaded by DC-DC converters

The dynamic behavior of the buck converter feeding downstream DC-DC converters is studied in this paper. DC-DC converters acting as a load are modeled as constant power loads except at low voltage, where the behavior of the start-up circuitry is included. A comprehensive large-signal analysis of a buck converter including over-current protection and feeding the described load is performed. This paper addresses the transient process of the converter's start-up and turn on/off of loads consisting of DC-DC converters and gives design considerations to assess performance and stability robustness of a simple proportional-derivative controller.

[1]  G. Stein,et al.  Respect the unstable , 2003 .

[2]  C. Rivetta,et al.  Large-signal analysis of a DC-DC buck power converter operating with constant power load , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[3]  V. Grigore,et al.  Dynamics of a buck converter with a constant power load , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[4]  Mehrdad Ehsani,et al.  Multi-converter power electronic systems: definition and applications , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[5]  Sung-Soo Hong,et al.  Dynamics and control of DC-to-DC converters driving other converters downstream , 1999 .

[6]  Thomas Wilson.  Start-Up Transient of a DC-to-DC Converter Powered by a Current-Limited Source , 1981, IEEE Transactions on Aerospace and Electronic Systems.

[7]  Jinjun Liu,et al.  Large-signal model of a downstream DC/DC converter for analysis and design of front-end PFC rectifier using computer simulation , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[8]  Graham C. Goodwin,et al.  Performance limitations for linear feedback systems in the presence of plant uncertainty , 2003, IEEE Trans. Autom. Control..

[9]  R. W. Ashton,et al.  The application of feedback linearization techniques to the stabilization of DC-to-DC converters with constant power loads , 1998, ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187).

[10]  Philip T. Krein,et al.  Modeling of PWM converters in discontinuous conduction mode. A reexamination , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[11]  R. M. Bass,et al.  Extensions of averaging theory for power electronic systems , 1994, Power Electronics Specialists Conference.

[12]  Mark L. Nagurka,et al.  Robust PI controller design satisfying sensitivity and uncertainty specifications , 2003, IEEE Trans. Autom. Control..