| Abstract |
A three-phase dual active bridge (DAB) converter with three-level phase-legs is analyzed, showing anincreased soft-switching region and a reduction in rms current in the ac-link for unequal input and outputvoltages compared to the conventional two-level circuit. Furthermore, a comparison of the semiconductorlosses is carried out for different three-level inverter implementations using commercially availablesilicon (Si) and silicon-carbide (SiC) power modules. The lowest losses are found for the T-type implementationwith a combination of SiC and Si power modules. Experimental results, obtained from ahigh-power prototype, are included to support the evaluation of the three-level three-phase DAB. |
