Johann W. Kolar

TL;DR: In this paper, a gate drive circuit for a SiC J-FETs to be employed in an AII-SiC-SMC is proposed, and the operating principle of the driver circuit is discussed and practically verified in a bridge leg topology.

TL;DR: In this paper, the authors derived analytical expressions for the dielectric losses produced by PWM waveforms of DC-DC, DC-AC, and multilevel DCAC inverters.

TL;DR: In this paper, an isolated front end (IFE) SST concept is proposed to reduce the complexity and physical size of the MV side converter assemblies compared to the well-known isolated back end (IBE) topologies, and the IFE approach performs the entire grid current and output voltage control on the LV side using standard non-isolated |AC|DC boost converter stages.

TL;DR: In this article, the practical realization of a novel concept for output voltage control and mains voltage proportional guidance of the input currents of a three-phase/switch/level PWM (VIENNA) rectifier system being connected to a heavily unbalanced mains is presented.

TL;DR: In this paper, the frequency dependent characteristics of a gapped toroidal structure are extracted empirically over a bandwidth that exceeds 30 MHz, due to non-linear flux distributions, magnetic properties of the core material, leakage inductance, stray capacitances and eddy currents in the windings.