Computer aided small-signal analysis for PWM DC-DC converters operated in discontinuous conduction mode

Author

Reatti, Alberto ; Balzani, Marianna

Author_Institution

Dept. of Electron. & Telecommun., Florence Univ., Italy

fYear

2005

fDate

7-10 Aug. 2005

Firstpage

1561

Abstract

A computer analysis of PWM dc-dc converters operated in discontinuous conduction mode DCM is presented. The analysis is based on a linearized small-signal model of the converter ideal switching-cell (ISC), which is used as a sub-circuit inside the circuit simulation program. The sub-circuit is used in computer simulation of a PWM buck-boost converter, which is based on equivalent circuits. A computer program for PWM dc-dc converters analysis generates the symbolic expressions of the root locus and Bode plots of the control-to-output voltage transfer function, the input-to-output voltage transfer function, the input impedance, and the output impedance which are given both in symbolic and numerical expression.

Keywords

DC-DC power convertors; PWM power convertors; equivalent circuits; transfer functions; Bode plots; PWM DC-DC converters; PWM buck-boost converter; circuit simulation program; computer aided small-signal analysis; discontinuous conduction mode; equivalent circuits; ideal switching-cell; linearized small-signal model; root locus; voltage transfer function; Circuit simulation; Computer simulation; DC-DC power converters; Equivalent circuits; Impedance; Pulse width modulation; Pulse width modulation converters; Switching circuits; Switching converters; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. 48th Midwest Symposium on

Print_ISBN

0-7803-9197-7

Type

conf

DOI

10.1109/MWSCAS.2005.1594413

Filename

1594413