Title :
Ripple effects on small signal models in average current mode control
Author :
Chunxiao Sun ; Lehman, Brad ; Sun, Jian
Author_Institution :
IPD/NU, Int. Power Devices Inc., Boston, MA, USA
fDate :
6/22/1905 12:00:00 AM
Abstract :
The effects of switching frequency ripple on the behavior of average current mode PWM DC/DC converters are studied. Ripple estimation and superposition methods are applied to derive new frequency-dependent averaged models that take into account these effects. Small-signal analysis of the new model reveals several important characteristics of average current mode control, especially under large ripple conditions, that previous models were unable to predict. Discussions on the small-signal models for PWM DC/DC converters are demonstrated
Keywords :
DC-DC power convertors; PWM power convertors; control system analysis; electric current control; switching circuits; PWM DC/DC power converters; average current mode control; control characteristics; frequency-dependent averaged models; ripple estimation; small signal models; small-signal analysis; superposition methods; switching frequency ripple; DC-DC power converters; Frequency estimation; Power engineering and energy; Power engineering computing; Predictive models; Pulse width modulation; Pulse width modulation converters; Quantum computing; Sun; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5864-3
DOI :
10.1109/APEC.2000.822599
