Title :
Influence of dc-link bus voltage on power losses and thermal behavior of a bidirectional two-level dc-ac converter
Author :
Spallier, F. ; Brockerhoff, Philip
Author_Institution :
Dept. of Electron. Eng., FH JOANNEUM Univ. of Appl. Sci., Kapfenberg, Austria
Abstract :
This paper presents the benefit of an increased dc-link bus voltage on power losses in a bidirectional two-level inverter. Inherent power losses in inverter originate in IGBTs and diodes among electric vehicles. A model is built to consider parameters from these devices, electric input (current, voltage, power factor) with improved accuracy to evaluate losses and estimate the junction temperature of IGBT and diode with the help of an equivalent thermal-electric model. Compared are two dc-link bus voltages of 400V and 700V. Also SiC-diode is applied to further improve efficiency in motoring and regeneration modes.
Keywords :
DC-AC power convertors; electric vehicles; insulated gate bipolar transistors; invertors; power bipolar transistors; power semiconductor diodes; silicon compounds; wide band gap semiconductors; IGBT; SiC; bidirectional two-level dc-ac converter thermal behavior; dc-link bus voltage; diodes; electric input; electric vehicles; equivalent thermal-electric model; inverter; power losses; voltage 400 V; voltage 700 V; Insulated gate bipolar transistors; Inverters; Junctions; Semiconductor diodes; Silicon carbide; Switches; Temperature measurement; dc-link voltage; inverter efficiency; power losses; thermal behavior;
Conference_Titel :
Ecological Vehicles and Renewable Energies (EVER), 2013 8th International Conference and Exhibition on
Conference_Location :
Monte Carlo
Print_ISBN :
978-1-4673-5269-7
DOI :
10.1109/EVER.2013.6521622
