Empirical Radiation Noise Identification and Reduction by Optimized IGBT without Increasing Power Loss

Intelligent Power Module (IPM) is a key device for motor control. The market continuously requests higher power density to shrink housing and faster switching speed to decrease losses. Due to increasing switching speeds, it is typically necessary to take countermeasures to reduce noise by power chips, especially radiation noise. This paper describes how to identify the location and timing of emitting high radiation noise from IPM and half bridge and how to reduce radiation noise without increasing power losses by optimizing IGBT structure.