Title :
Comparative study of linear and nonlinear passivity-based control methods for switched-mode power supplies in audio amplification systems
Author :
Oliveira, T.R. ; Donoso-Garcia, P.F. ; Seleme, S.I., Jr. ; Morais, L.M.F.
Author_Institution :
IFMG, Autom., Inst. Fed. de Minas Gerais, Betim, Brazil
Abstract :
This paper presents the comparison of linear and nonlinear passivity-based controllers used to enhance the performance of power supplies employed in audio amplification systems. Theoretical analysis and experimental results have shown that passivity-based control topologies can reduce the output impedance of the power supply, thus providing low level ripple on the voltage rails and allowing the reduction of the power supply output capacitor.
Keywords :
audio-frequency amplifiers; linear systems; nonlinear control systems; switched mode power supplies; audio amplification systems; linear passivity-based control method; low level ripple; nonlinear passivity-based control method; output capacitor; output impedance; switched mode power supplies; voltage rails; Capacitors; Control systems; Harmonic analysis; Impedance; Power supplies; Rails; Voltage control;
Conference_Titel :
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-61284-969-0
DOI :
10.1109/IECON.2011.6119363
