Voltage‐mode robust controller design for DC–DC boost converter at the presence of wide load and input voltage variations based on finite‐state‐machine model

Abstract

In this study, first, a new definition is proposed for the state of the boost converter. In this approach, the state is defined based on the relative value of two successive samples of the output voltage with respect to the reference voltage. Then a finite-state-machine (FSM) model, which takes into account the possible variations of the input voltage and load resistance, is proposed. This model is discrete-time and represents the evolution of states implicitly based on the events like load and input voltage variation. One advantage of this model is that it is valid both in continuous conduction mode and discontinuous conduction mode. At the next step, a voltage-mode controller, which can regulate the output voltage at the presence of load and input voltage variations, is proposed. Stability of the resulting closed-loop system is studied using the FSM model and the discrete-time Lyapunov method. Simulations and experimental results are presented.

Enhanced Tracking of DC-DC Buck Converter Systems Using Reduced-Order Extended State Observer-Based Model Predictive Control

“…Of all the DC-DC converters, the DC-DC buck converter stands as one of the most fundamental and emblematic. However, it has been observed that such converters inevitably encounter both internal and external disturbances, collectively termed as total disturbances [1]. These disturbances have been identified to comprise uncertainties in power generation equipment, electromagnetic noise, and variations in load [1].…”

“…However, it has been observed that such converters inevitably encounter both internal and external disturbances, collectively termed as total disturbances [1]. These disturbances have been identified to comprise uncertainties in power generation equipment, electromagnetic noise, and variations in load [1]. Moreover, challenges posed by input variations have been perceived to be more intricate compared to load changes [1].…”

“…These disturbances have been identified to comprise uncertainties in power generation equipment, electromagnetic noise, and variations in load [1]. Moreover, challenges posed by input variations have been perceived to be more intricate compared to load changes [1]. Such complications are believed to escalate risks of power loss and potential equipment damage [2].…”

Boost Converters’ Proximate Constrained Time‐Optimal Sliding Mode Control Based on Hybrid Switching Model

“…Up to date, SMC has been extensively studied [18][19][20][21][22]. Valuable studies are performed on novel sliding surfaces for some applications [23][24][25].…”

“…Hence, the chattering issue in this application is different from the traditional one [23]. e key point to be addressed is finding the time-optimal sliding surface with a stable margin as to relieve the sensitivity to parameter changes [21,22].…”