A Modified Boost Converter with Reduced Input Current Ripple

• Main Author: Lentz, Nathan H
• Format: Others
• Published: DigitalCommons@CalPoly 2017
• Subjects: dc/dc; boost; converter; input; current; ripple; Power and Energy
• Online Access: https://digitalcommons.calpoly.edu/theses/1740; https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=2976&context=theses

Battery-powered trends in consumer electronics, transportation, and renewable energy sectors increase demands on DC/DC converter technology. Higher switching frequency and efficiency reduces solution size and cost, while increasing power capabilities. Still, switching noise remains the primary drawback associated with any DC/DC converter. Reducing a converter’s input ripple helps prevent switching noise from spreading to other systems on a shared DC power bus. This thesis covers the analysis, simulation, and implementation of a recently-proposed boost converter topology, alongside an equivalent standard boost converter, operating in steady-state, continuous conduction mode. A Matlab-based simulation predicts each converter’s input ripple performance using a state-space model. The converters’ hardware implementation minimizes component and layout differences to create an equivalent comparison. The simulation and hardware measurements demonstrate a 40% input current ripple reduction using the modified topology. Replacing standard boost converters with the modified topology minimizes the switching noise conducted through a system’s DC power network.