Test stand for obtaining power transistors switching characteristics during aging

This paper aims to construction, control and implemented measurement method of laboratory stand in order to acquire insulated gate bipolar transistor transients. The transients waveforms are consequently used to obtain indicators of the transistor age. The lifetime tests of an insulated gate bipolar transistor are introduced. Consequently, a novel architecture of measuring stand in order to provide lifetime tests is designed. Also the control algorithm is presented. A fundamental part of this work is a method of measuring switching waveforms including a high frequency current. Acquired waveforms of transistor switching are presented. Finally, the trend of chosen aging indicator values was obtained from the acquired data. Namely the influence of aging on turn-off time was observed.