Small-signal modeling of variable-frequency pulsewidth modulators

Author

Jian Sun

Author_Institution

Adv. Technol. Center, Rockwell Collins Inc., Cedar Rapids, IA

Volume

38

Issue

3

fYear

2002

fDate

7/1/2002 12:00:00 AM

Firstpage

1104

Lastpage

1108

Abstract

Small-signal linear models are presented for variable-frequency constant on-time and variable-frequency constant off-time pulsewidth modulators. Both modulation methods are shown to have leading phase characteristics and nonlinear amplitude responses. The analytical results are validated by numerical simulation results and compared with previously published empirical models. The models are intended for use in analysis and control design of pulsewidth modulated switching power converters.

Keywords

DC-DC power convertors; PWM power convertors; linear network analysis; modulators; pulse width modulation; switching circuits; PWM power converters; constant off-time; constant on-time; leading phase characteristics; nonlinear amplitude responses; numerical simulation; small-signal linear models; switching power converters; variable-frequency pulsewidth modulators; Control design; DC-DC power converters; Frequency; Phase modulation; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switches; Switching converters;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2002.1039428

Filename

1039428