Research on Linear Active Disturbance Rejection Control in DC/DC Boost Converter
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Liu, Xinxiu
Lu, Junwei
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Abstract
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.
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Electronics
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8
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11
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© 2019 The Authors. Licensee MDPI, Basel, Switzerland. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Subject
Engineering
Electrical engineering
Science & Technology
Technology
Engineering, Electrical & Electronic
DC/DC boost converter
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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 (11)