Detailed Modeling and In-Situ Calorimetric Verification of Three-Phase Sparse NPC Converter Power Semiconductor Losses

Power Loss Modelling and Performance Comparison of Three-Level GaN-Based Inverters Used for Electric Traction

“…In the literature, several methods have been presented to compute the power losses of motor drive fed with an inverter, including both the losses of the electric motor (copper, iron, and friction) and power converter (conduction and switching). Some of them are reported in [19,[24][25][26][27][28][29][30]. In [24][25][26], an IGBT-based 2L-VSI power converter is considered, and the related power losses are analytically evaluated, where the conduction ones are determined by computing the load RMS current, duty ratio, and power factor.…”

“…Despite a similar approach in electric motor modelling, in [27], IGBT power losses are computed similarly to [24][25][26], while in [28], a look-up table-based approach is implemented. Differently from [24][25][26], in [29,30] the IGBT power losses are computed including the junction temperature function.…”

“…With regard to the electric motor model, [29] uses a similar qd-axis-equivalent circuit model to [24], whereas in [30] an inductor load replaces the electric motor. In [19], the power loss in GaN-based 2LI and 3LI NPC inverter topologies used for electric traction are computed considering an analytical approach to evaluate both GaN conduction and switching power losses.…”