College of Engineering

A Master thesis was discussed in Department of Electrical Engineering / College of Engineering at University of Mosul entitled ” DC-Coupled Extreme Fast Charging for Electric Vehicles using Dual-Active Bridge Converter ” submitted by (Omar Haitham Salim), Supervised By Assist. Prof. Dr. Yasir M.Y. Ameen. On Wednesday, Oct. 26, 2022.
In this thesis, a Dual Active Bridge (DAB) converter is adopted in the application of XFC of EV coupled with DC. The modulations of this converter within this range were studied and analyzed. Phase-Shift modulation and Trapezoidal-Current modulation were simulated using MATLAB/Simulink software.A proposed XFC for EVs has been designed with the ability to bi-directionally transfer power from Grid-to-Vehicle G2V and from Vehicle-to-Grid V2G or to charge another vehicle V2V with a power of 1.4 MW, a DC input voltage of 11 kV and a range of output voltages from 900–1500 V, which is the highest charging voltage allowed within the CHAdeMO 3.0 standard. By relying on the DAB converter with a multi-level structure, it has been possible to dispense with the AC-AC stage in the conventional fast charger structure and thus have a smaller charger size at a lower cost with the possibility of integrating power storage systems and DC sources of renewable energy for each level of the converter.
The simulation results showed that the charging time of the heavy vehicle battery pack with a capacity of 540 kWh was reduced to only 18 minutes and 40 seconds when charged from 20% to 90% of the State-of-Charge SOC.
A laboratory model of a 1 kW bidirectional DAB converter was also built and presented using IGBT and SiC MOSFET switches. Its results showed compatibility with the mathematical analysis and simulation model.