NDLI: Input-output linearization and stabilization analysis of internal dynamics of buck-boost converters

Content Provider	IEEE Xplore Digital Library
Author	Dingxin Shuai
Copyright Year	2012
Description	Author affiliation: College of Electrical and Information Engineering, Panzhihua University, Panzhihua 617000, China (Dingxin Shuai)
Abstract	Using the state-space average modeling method, a nonlinear affine model of Buck-Boost converter is set up. Based on the input-output linearization method of differential geometry theory, the internal dynamics of the systems, with output represented by inductor current and capacitor voltage respectively, are been studied. It is pointed out that the average PWM model of the ‘Buck-Boost’ converter, with output represented by the average capacitor voltage, is actually a nonminimum phase system, and its internal dynamics is unstable. So, it is unfeasible to control the output voltage directly. But, if the output is represented by the average inductor current, the system is a minimum phase system, and its internal dynamics is asymptotically stable. It is feasible to control the output voltage indirect through the regulation of inductor current. Further, the nonlinear state feedback law is proposed. The control law proposed in this paper has some advantages of being simple, easy to implement. The validity of the indirect output capacitor voltage control scheme using input-output feedback linearization method is verified by numerical simulation results. Key waveforms based on simulated extensive work verify the superiority of the proposed nonlinear control method.
Starting Page	1013
Ending Page	1017
File Size	162385
Page Count	5
File Format	PDF
ISBN	9781467325813
ISSN	21612927
e-ISBN	9789881563811
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Chinese Assoc of Automati
Subject Keyword	input-output linearization stabilization Buck-Boost converter Capacitors Pulse width modulation Control systems Nonlinear dynamical systems internal dynamics nonlinear Voltage control Inductors Equations
Content Type	Text
Resource Type	Article

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