Title :
Design and control of sensorless current mode DC-DC converters
Author :
Mossoba, J.T. ; Krein, P.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
Sensorless current-mode (SCM) control of DC-DC converters is a feedforward open loop scheme, which is compared to peak current-mode (PCM) control. Small signal model simulations of each controller are validated by experimental results. SCM offers improvements over the line disturbance rejection of current-mode control without feedback or current sensing. SCM is demonstrated to be useful in both open loop and closed loop configurations, by exploiting its inherent reference tracking and line disturbance rejection. In contrast, PCM requires a high gain two-loop control for voltage regulation.
Keywords :
DC-DC power convertors; circuit feedback; electric current control; feedforward; step response; voltage control; DC-DC converters; closed-loop control; feedforward; inherent reference tracking; line disturbance rejection; open loop scheme; sensorless current-mode; small signal model; step response; Buck converters; Clocks; DC-DC power converters; Inductors; Machinery; Open loop systems; Phase change materials; Sensorless control; Switches; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
DOI :
10.1109/APEC.2003.1179232
