Modeling Analysis and Simulation of Poly-Phase Boost Converter

Abstract

The objective of this project is to design Poly-phase boost converter which overcomes the problem of high input ripple current and output ripple voltage Digital control is more convenient for such a topology on account of the requirement of synchronization , phase shift operation , current balancing etc. This project deals on analysis and implementation of four phase boost converter, each is a 35W unit and switched at 100 KHz. The waveforms are observed using MATLAB Simulink. The following advantages are obvious in the proposed converter: • Output capacitor is rated for lower ripple current and higher ripple frequency (nfs). • Source current has higher ripple and at higher frequency (nfs). • Another no obvious advantage is that the Poly-phase Converter may be operated with less number of stages when the load current is low. This will lead to operation under CCM at light load as well as better efficiency. Simulation results are presented for open-loop and closed-loop for four phase boost converter. This control scheme is applicable for PFC rectifiers as well. Thus a comparative analysis based on the obtained results is performed.