Title :
Dynamic effects of inductor current ripple in average current mode control of [DC/DC power converter]
Author :
Suntio, T. ; Lempinen, J. ; Gadoura, I. ; Zenger, K.
Author_Institution :
Electron. Lab., Oulu Univ., Finland
fDate :
6/23/1905 12:00:00 AM
Abstract :
A consistent methodology to assess the effect of inductor current ripple on the dynamics of an average-current controlled buck converter is presented based on the duty-cycle constraints derived for peak-current mode control. The duty-cycle constraints for average-current-mode control are derived on a unified basis, leading to small-signal models describing and predicting accurately the dynamical behavior of a power converter. The dynamic effect of high-frequency pole of the current-loop controller is discussed more in detail
Keywords :
DC-DC power convertors; closed loop systems; control system analysis; electric current control; inductors; poles and zeros; DC/DC buck power convertor; average current mode control; current-loop controller; duty-cycle constraints; high-frequency pole; inductor current ripple dynamic effects; peak-current mode control; small-signal models; Buck converters; Inductors; Laboratories; Phase change materials; Power factor correction; Power system harmonics; Predictive models; Switching converters; Switching frequency; Topology;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954293
