Propagation characteristics of acoustic wave induced by partial discharge in IGBT module

The next-generation power module is expected to be used in high voltage applications. The key issue in high-voltage power module is the existence of partial discharge (PD). Therefore identifying a PD location leads to a higher voltage operation of power module. PD location could be made by measuring acoustic wave detected by acoustic emission sensors. This paper deals with propagation characteristics of acoustic wave emitted by PD in an IGBT power module.