PA – Performance Evaluation of Soft-Switching Inverters for Electrical Vehicles

Soft switching is a technique that can potentially increase the efficiency and power density of the power inverters, and is therefore drawing attention of the electromobility industry. In particular, quasi-resonant dc-link (QRDCL) inverters and auxiliary resonant commutated pole (ARCP) inverters have been discussed and studied extensively.

The Task for the student: a) Literature review on the soft-switching techniques; b) Understand the working principles of the QRDCL and ARCP inverters and build their simulation models; c) Evaluate and compare these two soft-switching techniques for custom-defined operating conditions, i.e., 800 V dc-link voltage, 600 A rms phase current, inverter switching frequency up to 50 kHz. More specifically, the following aspects should be considered: 1) The loss/efficiency of the inverters; 2) The estimated volumes of the inverters, e.g., chip area of power modules, number and size of auxiliary components; 3) The quality of the inverter output voltages.

Required prior knowledge: Fundamentals about power electronics, pulse width modulation, electrical circuits.

Required software skill: MATLAB/Simulink or PLECS.

Bearbeiter: Musab Bin Umair

Betreuer: Qifan, Yang; Falinski, Marcel

Verantwortlicher:  Prof. Dr.-Ing. Martin März