Non-linear current-mode control for boost power converters: a dynamic backstepping approach

A control scheme for boost power converters based on current-mode control is given. The proposed methodology relies on the design of two feedback loops. An outer loop for steady state error compensation using a proportional-integral action and a non-linear inner loop for current tracking. A dynamic...

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Bibliographic Details
Published in:IET control theory & applications 2017-09, Vol.11 (14), p.2261-2269
Main Authors: Langarica-Cordoba, Diego, Leyva-Ramos, Jesus, Diaz-Saldierna, Luis H, Ramirez-Rivera, Victor M
Format: Article
Language:English
Subjects:
asymptotic stability
boost power converters
closed loop systems
closed‐loop system performance
control nonlinearities
current tracking
dSPACE platform
dynamic backstepping controller
electric current control
error compensation
feedback
feedback loops
Lyapunov function
Lyapunov methods
nonlinear control systems
nonlinear current‐mode control
nonlinear inner loop
PI control
power 130 W
power convertors
proportional‐integral action
region‐of‐attraction
Research Article
steady state error compensation
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Summary:A control scheme for boost power converters based on current-mode control is given. The proposed methodology relies on the design of two feedback loops. An outer loop for steady state error compensation using a proportional-integral action and a non-linear inner loop for current tracking. A dynamic backstepping controller with a well-defined region of attraction, ensuring asymptotic stability via a Lyapunov function, is achieved. The closed-loop system performance is evaluated through experimental results for a 130 W boost power converter with the controller implemented in a dSPACE platform, where precise regulation, tracking and robust behaviour with respect to large unknown load variations are proven successful.
ISSN:1751-8644
1751-8652
1751-8652
DOI:10.1049/iet-cta.2016.1490