Performance Analysis of a Two-Stage AC-DC Conversion System with Boost Converter under Varying Torque Conditions

Abstract

This manuscript doth present a simulation-oriented inquiry into a dual-stage power conversion apparatus, comprising firstly an AC to DC rectifier, followed thereafter by a DC to DC boost converter, intended for applications in motor propulsion systems. The said configuration was scrutinised for its dynamic comportment under sundry conditions of load torque—namely, 10 Nm, 15 Nm, and 20 Nm. Initially, the alternating current supply is rendered unto a steady 45 volts direct current by means of a full-bridge rectifying device. This resultant voltage is thenceforth directed into a boost converter, whose output was observed to fluctuate between 24 volts and 48 volts, the variance being subject to the nature of torque demands and the inherent dynamics of the converter. The entirety of the analysis was executed within the MATLAB/Simulink environment, wherein the response of the motor drive was duly recorded at each torque setting. The findings did reveal that with increasing demand of torque, the output voltage of the converter became more perturbed, displaying heightened ripple and lesser stability—thereby evincing a pressing need for more robust regulation and compensatory schemes. Nevertheless, the system did exhibit adequate performance in upholding continuity of operation throughout. These insights may serve to inform the refinement of power conversion stages in electric drive arrangements, especially where the torque imposed upon the system is of a variable character. Prospective improvements might well entail the adoption of advanced governance mechanisms, such as Proportional–Integral–Derivative (PID) control, fuzzy logic, or sliding mode techniques, with a view towards enhanced voltage steadiness and superior transient behaviour.