Title :
Average small-signal model of buck converter used as power factor preregulator
Author :
Cardesín, J. ; Sebastián, J. ; Villegas, P. ; Hernando, M. ; Fernández, A.
Author_Institution :
Dpto. de Ingenieria Electrica y Electronica, Univ. de Oviedo, Gijon, Spain
Abstract :
The DC/DC buck converter is an interesting solution to implement power factor correction (PFC) in many applications, meeting the IEC 1000-3-2 standard with a low cost circuit. In this paper, an average small-signal model of buck converter realising power factor correction is presented. The model is valid for frequencies lower than the line frequency and allows the precise design of the output voltage control loop. The average small-signal model has been obtained for two classic control methods of PFC preregulators: The voltage follower control and the multiplier control with sinusoidal current reference. Simulations and experimental tests have validated the average small-signal proposed.
Keywords :
DC-DC power convertors; IEC standards; compensation; power factor correction; voltage control; DC/DC buck converter; IEC 1000-3-2; PFC preregulators; average small-signal model; multiplier control; output voltage control loop compensation; output voltage control loop design; power factor correction; sinusoidal current reference; voltage follower control; Buck converters; Circuits; Costs; Frequency; IEC standards; Low voltage; Power factor correction; Reactive power; Topology; Voltage control;
Conference_Titel :
Industry Applications Conference, 2002. 37th IAS Annual Meeting. Conference Record of the
Conference_Location :
Pittsburgh, PA, USA
Print_ISBN :
0-7803-7420-7
DOI :
10.1109/IAS.2002.1043828
