Robust Adaptive Feedback VBW Model for HM-Based SM Controller for DC-DC Multicellular Converters

This paper compares and examines two different strategies: the variable-bandwidth (VBW) of the hysteresis modulation (HM) and the unipolar pulse-width modulation (PWM) by double intersection, both are based on the CSM method (conventional sliding mode). The two strategies are used to create a novel bidirectional asynchronous multichannel DCDC Buck converter architecture. The cells are linked in parallel and operated in continuous conduction mode (CCM). Our study contributes to the control method and the implementation, the command is applied at the same time without phase shift to an identical three cells of a non-isolated and asynchronous converter, this topology is rarely studied. The aim is to fix the switching frequency of the converter while referring to an adaptive feedback approach. Therefore, we integrate a hysteresis modulator and develop a variable hysteresis band function to reduce the standard sliding mode’s non-linearity phenomena. Then, we apply an adaptive feedback current control technique to surpass the dilemma of the variable switching frequency for high power converters. The findings show that the system under investigation became more stable, efficient, and capable of coping with changes in input voltage, load, and intended output voltage. The same data clearly highlight the locations where substantial disparities between the two tactics have been discovered. To examine system performance and assess its resilience and stability under parametric change, simulation studies in the MATLAB® / Simulink™ environment are used.