Ultra Buck DC/DC Converter for Electric Vehicles

TL;DR

This paper reviews DC-DC buck converter development for electric vehicles and introduces a novel extended-phase interleaved topology with control techniques, verified through simulations and hardware testing for efficient 12V power supply from high-voltage batteries.

Contribution

It proposes a new extended-phase interleaved buck converter topology with control methods, enhancing voltage conversion ratio for EV applications.

Findings

Higher voltage conversion ratio achieved.

Simulation results confirm improved performance.

Hardware prototype demonstrates practical viability.

Abstract

A critical challenge in power conversion in electric vehicles is the efficient use of DC-DC buck converters that need to provide 12-V supply for load systems from 400/800-V batteries. This paper presents a literature review on the development of DC-DC buck converters. Moreover, one novel four-phase interleaved step-down topology is selected for simulation and hardware experiments. Based on the four-phase interleaved structure, an extended-phase topology is proposed, which has a higher voltage conversion ratio. Control techniques are also applied to it. Theoretical analyses and simulation results are provided to verify the improved converter. A 400V-to-12V and 150W output power hardware prototype is implemented to verify its performance