Title :
Nonlinear average current mode control for a DC-DC buck converter in continuous and discontinuous conduction modes
Author :
Kancherla, Sreenu ; Tripathi, R.K.
Author_Institution :
Dept of Electr. Eng., Motilal Nehru Nat. Inst. of Technol. Allahabad, Allahabad
Abstract :
In this paper the nonlinear average current control for a DC to DC buck converter is presented in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The outer voltage controller uses a PI controller. In this control scheme, switch current is being sensed instead of inductor current. Average of inductor current, output voltage with line and load regulation is being controlled using this control scheme. This control method requires no current compensator design. A 10 W, 100 kHz buck converter with simulation results and open loop hardware results are presented.
Keywords :
DC-DC power convertors; PI control; compensation; electric current control; nonlinear control systems; voltage regulators; DC-DC buck converter; PI controller; continuous conduction mode; current compensator design; discontinuous conduction modes; frequency 100 kHz; nonlinear average current control; nonlinear average current mode control; power 10 W; voltage controller; Buck converters; Circuits; Current control; DC-DC power converters; Inductors; Open loop systems; Pulse width modulation; Switches; Switching converters; Voltage control; Buck converter; CCM; DCM; PI controller; switch current;
Conference_Titel :
TENCON 2008 - 2008 IEEE Region 10 Conference
Conference_Location :
Hyderabad
Print_ISBN :
978-1-4244-2408-5
Electronic_ISBN :
978-1-4244-2409-2
DOI :
10.1109/TENCON.2008.4766841
