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Research on Linear Active Disturbance Rejection Control in DC/DC Boost Converter

by Hui Li 1, Xinxiu Liu 1 and Junwei Lu 2,*
1
College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2
School of Engineering and Built Environment, Griffith University, Gold Coast, QLD 4222, Australia
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1249; https://doi.org/10.3390/electronics8111249
Received: 24 September 2019 / Revised: 28 October 2019 / Accepted: 28 October 2019 / Published: 31 October 2019
(This article belongs to the Section Power Electronics)
This paper proposes a cascade control strategy based on linear active disturbance rejection control (LADRC) for a boost DC/DC converter. It solves the problem that the output voltage of boost converter is unstable due to non-minimum phase characteristics, input voltage and load variation. Firstly, the average state space model of boost converter is established. Secondly, a new output variable is selected, and a cascade control is adopted to solve the problems of narrow bandwidth and poor dynamic performance caused by non-minimum phase. LADRC is used to estimate and compensate the fluctuations of input voltage and loads in time. Linear state error feedback (LSEF) is used to achieve smaller errors than traditional control method, which ensures the stability and robustness of the system under internal uncertainty and external disturbance. Subsequently, the stability of the system is determined by frequency domain analysis. Finally, the feasibility and superiority of the proposed strategy is verified by simulation and hardware experiment. View Full-Text
Keywords: DC/DC boost converter; LADRC; LESO; cascade control DC/DC boost converter; LADRC; LESO; cascade control
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Li, H.; Liu, X.; Lu, J. Research on Linear Active Disturbance Rejection Control in DC/DC Boost Converter. Electronics 2019, 8, 1249.

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