Electric Vehicle IGBT Power Module Sizing and Drive Cycle Energy Efficiency for Various Switching Frequencies-Based on a Scalable Module Model

摘要

Preferably, in electric vehicles, the drive system components are sized to comply with performance requirements while simultaneously striving to keep energy losses and cost down. One of the parameters affecting the inverter's losses is the selected switching frequency. Hence it could also play a role during sizing. In this paper an electric vehicle IGBT power module is sized using various switching frequencies, against a scaled reference electric machine. As a tool for this assessment a scalable power module model is suggested, that scales with current rating. Finally, the impact on drive cycle efficiency is determined for various inverter ratings designed for different switching frequencies.