Title :
Small-signal modeling of variable-frequency pulsewidth modulators
Author_Institution :
Adv. Technol. Center, Rockwell Collins Inc., Cedar Rapids, IA
fDate :
7/1/2002 12:00:00 AM
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;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2002.1039428
