The IGBT Losses Analysis and Calculation of Inverter for Two-seat Electric Aircraft Application

摘要

This paper presented a parabola interpolation method to calculate the inverter IGBT losses, diode conduction losses, switching losses, total losses and efficiency. The method used parabola interpolation to fit the losses characteristic curves instead of linear approximation. A test platform for the two-seat electric aircraft inverter was set up, and the efficiency was tested. The efficiency was 95.13% at the current of 68.31 A and 93.42% at the current of 97.41 A. The errors between calculation and tested results were 3.3% and 3.9%, respectively. The errors both in the range of 4% verified a good agreement with experimental values and affirmed the accuracy of the parabola interpolation method.