Reliability of IGBTs in solid-state pulsed power supplies for CO 2 TEA lasers
The IGBT (insulated gate bipolar transistor) is a modern solid-state switch with wide applications in power electronics. Little information is, however, available on the performance and reliability of the switch in pulsed power supplies. Results of reliability tests conducted on a high-power, high-voltage IGBT are presented with special focus on applications in high-voltage laser pulsed power supplies. It was found that the IGBT could be reliably used in pulsed power supplies where the peak switching current exceeded the average current rating up to five times. Furthermore, the IGBT could be reliably connected in series to increase the switch operating voltage.