Department of Electrical and Electronics Engineering

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    Disturbance observer-based sliding mode control of boost-flyback converter
    (IEEE, 2025-04) Bansal, Hari Om; Gautam, Aditya R.
    This paper presents a disturbance observer based sliding mode control of single-input double-output Boost-flyback dc-dc converter. The converter supplies two outputs i.e. flyback side output and boost side output through common magnetic path of flyback transformer. The power flow through common magnetic path poses the challenges of cross-coupling and crossregulation at line and load transient operations of converter. In this paper, these challenges are alleviated using sliding mode control approach. Moreover, a disturbance observer is also designed to alleviate the effect of cross-regulation at the load transients. The performance of proposed control technique is validated using simulation results.
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    Decoupled Control of Single-Input Double-Output Boost-Flyback Converter
    (IEEE, 2023) Gautam, Aditya R.
    The paper proposes a modified single-input double-output boost-flyback converter and its decoupling control technique. The converter avails two different outputs i.e. one to supply a light load at low-voltage and another to supply heavier load at higher voltage in single-stage itself. The availability of different voltage/power outputs is need of toady's automation in power applications such as in personal computers, electric vehicles, smart grids, shipboards. The major challenges of the coupled-inductor or flyback transformer-based multi-output converter are cross-coupling and cross-regulation issues. The proposed converter not only supplies two different outputs but also eliminate coupling and regulation issues. Moreover, the low voltage/power output of converter remains isolated from higher voltage/power output. The working principle of proposed converter and its PWM scheme, dynamic model and a procedure to find decoupling condition to design a decoupled control technique are discussed. Also, to verify the working of converter and its decoupled-control the simulation results are presented using MATLAB Simulink.