Please use this identifier to cite or link to this item: https://idr.l1.nitk.ac.in/jspui/handle/123456789/9595
Title: A fixed frequency duty-ratio based digital sliding-mode controller for DC-DC buck converter
Authors: Perumal, P.
Ronanki, D.
Kiran, B.
Issue Date: 2018
Citation: Journal of Low Power Electronics, 2018, Vol.14, 1, pp.67-77
Abstract: The hysteresis modulation (HM) based sliding mode control (SMC) implementation results in variable frequency, where the converter's operating frequency cannot be measured accurately. This will have a negative impact on circuit component and filter design. Furthermore, it is sensitive to the disturbances and the parameter uncertainties. To maintain constant switching frequency during line and load regulation, a duty-ratio (DR) based sliding-mode (SM) control approach is proposed in this paper and applied to a DC-DC buck converter. The translation of the SM control law for HM and DR scheme implementation by using field programmable gate array (FPGA) for DC-DC buck converter is illustrated. A simple and self-explanatory design and implementation procedure are also addressed. The performance and robustness of the proposed DR-based SM controllers are validated by both simulation results using MATLAB/Simulink and experimental results. The robustness of the SM controller is tested at various operating conditions and compared the results with HM-based SM and conventional linear controller. 2018 American Scientific Publishers All rights reserved.
URI: 10.1166/jolpe.2018.1531
http://idr.nitk.ac.in/jspui/handle/123456789/9595
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