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The reverse conduction capability of MOSFETs is beneficial for the efficiency of a three-phase inverter. In this article, analytical expressions in closed form are presented which allow to quickly evaluate the conduction losses, considering the effect of the reverse conduction, and blanking time for both sinusoidal pulsewidth modulation operation with and without third harmonic injection. The losses of a three-phase silicon carbide MOSFET inverter suitable for traction applications are estimated with the proposed method and show good agreement of about 98.5% with measurements, performed with a calorimetric setup.

Analytical Conduction Loss Calculation of a MOSFET Three-Phase Inverter Accounting for the Reverse Conduction and the Blanking Time