A Compound Controller Design for a Buck Converter

Yueping Sun, Li Ma, Dean Zhao and Shihong Ding
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Yueping Sun: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Li Ma: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Dean Zhao: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Shihong Ding: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China

Energies, 2018, vol. 11, issue 9, 1-17

Abstract: In order to improve the performance of the closed-loop Buck converter control system, a compound control scheme based on nonlinear disturbance observer (DO) and nonsingular terminal sliding mode (TSM) was developed to control the Buck converter. The control design includes two steps. First of all, without considering the dynamic and steady-state performances, a baseline terminal sliding mode controller was designed based on the average model of the Buck converter, such that the desired value of output voltage could be tracked. Secondly, a nonlinear DO was designed, which yields an estimated value as the feedforward term to compensate the lumped disturbance. The compound controller was composed of the terminal sliding mode controller as the state feedback and the estimated value as the feedforward term. Simulation analysis and experimental verifications showed that compared with the traditional proportional integral derivative (PID) and terminal sliding mode state feedback control, the proposed compound control method can provide faster convergence performance and higher voltage output quality for the closed-loop system of the Buck converter.

Keywords: terminal sliding mode; DC-DC converter; disturbance observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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