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Limit‐cycle stable control of current‐mode dc‐dc converter with zero‐perturbation dynamical compensation
Author(s) -
Lu Wei guo,
Lang Shuang,
Li Anxin,
Iu Herbert HoChing
Publication year - 2015
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.1942
Subject(s) - control theory (sociology) , perturbation (astronomy) , limit cycle , buck converter , converters , eigenvalues and eigenvectors , compensation (psychology) , physics , limit (mathematics) , mathematics , voltage , computer science , mathematical analysis , control (management) , quantum mechanics , psychology , artificial intelligence , psychoanalysis
Summary Regarding the non‐limit‐cycle instabilities, which commonly exist in the feedback‐controlled switching power converters, a new zero‐perturbation dynamical compensation method is proposed based on a simplified self‐stable dynamical compensation condition in this paper. With a current‐mode Buck converter as the subject of investigation, the corresponding self‐stable perturbation control equation is given. At the same time, the system stability boundary is obtained based on the investigation of the system eigenvalues, and hence, the working range of control parameters is determined. Finally, the presented simulation and experiment results reveal that the new zero‐perturbation dynamical compensation controller is easily realized with an analog circuit and it will not sacrifice the working range of the original reference current compared with the traditional slope compensation. Copyright © 2013 John Wiley & Sons, Ltd.