Title :
Modeling of a fixed-frequency resonant LLC DC/DC converter with capacitive output filter
Author :
Xiaodong Li ; Hong-Yu Li ; Gao-Yuan Hu
Author_Institution :
Fac. of Inf. Technol., Macau Univ. of Sci. & Technol., Macau, China
Abstract :
A linearized large-signal model is proposed for a fixed-frequency controlled LLC resonant dc/dc converter with capacitive output filter. The non-linearity existing in the two stage conversion models was linearized by the selection of a synchronous rotation reference. A weighted state feedback scheme is obtained naturally which can be used for closed-loop control. Both dc and ac state variables are combined together to generate a universal state-space model. The accuracy of the universal model is investigated by means of comparison between Matlab/Simulink simulation and the circuit level simulation in PSIM.
Keywords :
DC-DC power convertors; closed loop systems; frequency control; resonant power convertors; Matlab-Simulink simulation; PSIM; ac state variables; capacitive output filter; circuit level simulation; closed-loop control; dc state variables; fixed-frequency control; fixed-frequency resonant LLC DC-DC converter; linearized large-signal model; synchronous rotation reference; two stage conversion; universal state-space model; weighted state feedback; DC-DC power converters; Equations; Hafnium; Integrated circuit modeling; Mathematical model; Steady-state; Vectors;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
Conference_Location :
Denver, CO
DOI :
10.1109/ECCE.2013.6647441
