Six-phase dual-interleaved buck-boost converter for high power-density automotive applications

Abstract

This study presents a 30 kW, six-phase dual-interleaved buck-boost converter which uses an interphase transformer together with six buck-boost switching arms hard switched at 75 kHz for electric/hybrid vehicle applications. Parameters and construction details of the interphase transformer and common inductors are provided together with a description of the selection of semiconductor devices. Weight, power losses, and temperature rise are evaluated at rated power conditions showing experimental results with a 7 kW/kg gravimetric power density achieved with the converter prototype.

Keywords

• DC-DC power convertors
• automotive electronics
• hybrid electric vehicles
• power convertors
• inductors
• switching convertors
• buck-boost switching arms
• electric/hybrid vehicle applications
• interphase transformer
• 7 kW/kg gravimetric power density
• six-phase dual-interleaved buck-boost converter
• high power-density
• power 30.0 kW
• frequency 75.0 kHz
• power 7.0 kW