Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Wei He; Yukai Shang

doi:10.3390/electronics11050819

journal article Open Access Mar 05, 2022

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

Wei He

Yukai Shang

Electronics Vol. 11 No. 5 pp. 819 · MDPI AG

View at Publisher Save 10.3390/electronics11050819

Abstract

Constant power loads have negative impedance characteristics, which reduce the damping of DC/DC converter systems and have negative effects on the stability of the DC microgrid. In this paper, a finite-time parameter observer-based sliding mode controller is proposed for a boost converter with constant power loads. Firstly, a non-singular terminal sliding-mode controller is designed based on the flatness of the differential and sliding mode control theory. Secondly, a finite-time observer is designed to estimate the input voltage and tunes the parameter of the controller in time. Thirdly, the finite-time stability of the closed-loop system is proved through the proposed controller. Finally, the effectiveness and robustness of the proposed controller with unknown input voltage are verified by simulation. The proposed controller can guarantee finite-time convergence without input voltage sensors, which can reduce system cost and improve system reliability.

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Details

Published: Mar 05, 2022
Vol/Issue: 11(5)
Pages: 819
License: View

Authors

W

Wei He

School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China

Y

Yukai Shang

School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China

Cite This Article

Wei He, Yukai Shang (2022). Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads. Electronics, 11(5), 819. https://doi.org/10.3390/electronics11050819

Finite-Time Parameter Observer-Based Sliding Mode Control for a DC/DC Boost Converter with Constant Power Loads

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