Current-sensorless robust sliding mode control for the DC-DC boost converter

Said Oucheriah; Abul Azad; Said Oucheriah; Abul Azad

doi:10.3934/electreng.2025003

AIMS Electronics and Electrical Engineering

2025, Volume 9, Issue 1: 46-59. doi: 10.3934/electreng.2025003

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Current-sensorless robust sliding mode control for the DC-DC boost converter

Said Oucheriah ,
Abul Azad ^,

Department of Engineering Technology, Northern Illinois University, DeKalb, Il 60115, USA

Academic Editor: Yoash Levron

Received: 03 September 2024 Revised: 24 November 2024 Accepted: 13 December 2024 Published: 03 January 2025

A current-sensorless PWM-based robust sliding mode controller is proposed for the DC-DC Boost Converter, a nonminimum phase system that presents major challenges in the design of stabilizing controllers. The development of the controller requires the measurement of the output voltage and the estimation of its derivative. An extended state observer is developed to estimate a lumped uncertainty that comprises the uncertain load and input voltage, the converter parasitics, and the component uncertainties, and also to estimate the derivative of the output voltage. A linear sliding surface is used to derive the controller that is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics, despite the absence of the inductor current feedback. Also, a simple procedure to select the controller gains is outlined. The robustness of the controller is validated by computer simulations.
- robust sliding mode control,
- DC-DC boost converter,
- current-sensorless control,
- extended state observer
Citation: Said Oucheriah, Abul Azad. Current-sensorless robust sliding mode control for the DC-DC boost converter[J]. AIMS Electronics and Electrical Engineering, 2025, 9(1): 46-59. doi: 10.3934/electreng.2025003

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Abstract

A current-sensorless PWM-based robust sliding mode controller is proposed for the DC-DC Boost Converter, a nonminimum phase system that presents major challenges in the design of stabilizing controllers. The development of the controller requires the measurement of the output voltage and the estimation of its derivative. An extended state observer is developed to estimate a lumped uncertainty that comprises the uncertain load and input voltage, the converter parasitics, and the component uncertainties, and also to estimate the derivative of the output voltage. A linear sliding surface is used to derive the controller that is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics, despite the absence of the inductor current feedback. Also, a simple procedure to select the controller gains is outlined. The robustness of the controller is validated by computer simulations.

References

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