Unified control of DC-DC buck converter using dynamic adaptive controller for battery operated devices

Kanimozhi  Kannabiran; Shunmugalatha  Alagarsamy

doi:10.17533/udea.redin.n81a04

Authors

Kanimozhi Kannabiran ULTRA college of Engineering and Technology for Women
Shunmugalatha Alagarsamy Velammal College of Engineering and Technology

DOI:

https://doi.org/10.17533/udea.redin.n81a04

Keywords:

pulse width modulation, adaptive sliding mode control, buck converter, gain scheduling, Lyapunov stability

Abstract

The objective of this paper is improving the dynamic response of DC-DC converter system with internal parameter uncertainties. The methodology of sliding mode control in existing works is based on Proportional Integral and Derivative Controller (PID). The present work addresses various issues on a unified approach for design and application of pulse-width modulation (PWM) based on Digital Adaptive Sliding Mode equivalent (ASM) control technique to buck converter for mobile phones operating in continuous conduction mode (CCM), and discontinuous conduction mode (DCM). The controller is gain scheduled to monitor the output loading condition, and adaptively changes the control parameters to give an optimum dynamic performance corresponding to any load variations. Further stability is analytically verified using Lyapunov stability criterion and the system is proved to be globally asymptotically stable. Finally, the effectiveness of the proposed method is verified by simulation and experiment. Stable steady state response with reduced ripple is obtained.

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Author Biographies

Kanimozhi Kannabiran, ULTRA college of Engineering and Technology for Women

Associate Professor, Department of Electrical and Electronics Engineering.

Shunmugalatha Alagarsamy, Velammal College of Engineering and Technology

Professor and Head, Department of Electrical and Electronics Engineering.

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