Impedance Modeling for Accurate Estimation of DC-Bus Current and Voltage Ripple in Electric Vehicles: Presented at EVS 31 EVTeC 2018, Kobe, Japan, October 1 - 3, 2018

摘要

An electric vehicle is a complex system where multiple power electronic devices are connected to a common DC-bus. In order to determine the harmonics on the DC-bus, all ingoing subsystems must be accurately modeled. In this paper, the focus lies on how to model the common and differential mode impedance for all components. The derived impedance model for each subsystem is incorporated in a system model and the resulting current and voltage ripple on the DC-bus is compared to measurements. Due to the comprehensive parameter identification procedure, the system model was found valid for harmonics components up to ～3 MHz.