Title :
Comparison of averaging and harmonic balance methods for switched DC-DC converters
Author :
Kovar, Jan ; Kolka, Zdenek ; Biolek, Dalibor
Author_Institution :
Dept. of Radio Electron., Brno Univ. of Technol., Brno, Czech Republic
Abstract :
Line-to-output and Control-to-output frequency responses describe behavior of DC-DC converters under small-signal perturbation of the input voltage or the duty ratio. The responses are routinely obtained using the state space averaging method, which represents a certain simplification. The paper deals with validity of the obtained responses. Using the harmonic balance method as the reference it will be shown that the responses may be valid even above the Nyquist frequency depending on the structure of state matrices. The analysis has been made for all major types of converters.
Keywords :
DC-DC power convertors; frequency response; state-space methods; Nyquist frequency; control-to-output frequency response; duty ratio; harmonic balance methods; input voltage; line-to-output frequency response; small-signal perturbation; state matrices structure; state space averaging method; switched DC-DC converters; Computational modeling; Equations; Harmonic analysis; Mathematical model; Matrix converters; Switches; Switched DC-DC converter; frequency response; harminic balance; state-space averaging;
Conference_Titel :
Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference
Conference_Location :
Warsaw
Print_ISBN :
978-1-4244-7011-2
Electronic_ISBN :
978-83-928756-4-2
