Title :
Output impedance of peak current-mode controlled PWM DC-DC converters with only inner loop closed in CCM
Author :
Kondrath, Nisha ; Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Villanova Univ., Villanova, PA, USA
Abstract :
Different control loops employed in regulating deck converter outputs may have an effect on the output impedance of the converter. In this manuscript, the effect of the inner-current loop on the output impedance of a peak current-mode controlled PWM dc-dc converter with the outer-voltage loop open is investigated. Closed-loop output impedance including feed-forward gains with inner-current loop closed and outer-voltage loop open for peak-current mode controlled PWM dc-dc converters operating in CCM is derived. Bode plots of the closed-loop output impedance for PCM controlled PWM dc-dc buck and boost converters with inner-current loop only are illustrated using MATLAB simulations and are compared with the Bode plots of respective open-loop output impedances.
Keywords :
DC-DC power convertors; PWM power convertors; Bode plots; CCM; MATLAB simulations; boost converters; closed-loop output impedance; feed-forward gains; inner-current loop; open loop outer-voltage; open-loop output impedance; peak current-mode controlled PWM DC-DC converters; DC-DC power converters; Impedance; Inductors; Phase change materials; Pulse width modulation; Transfer functions; Voltage control; Power electronics; current-mode controlled PWM power converters; dc-dc power converters;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048728
