Coupling Coil Design and Positioning Optimization on New High Power Semiconductor Module for Fast Short Circuit Detection

Abstract:
This study explores the integration of coupling coils within Power Semiconductor Modules for sensing applications in railway traction converters. It focuses on the new high-power module devices generation called Low Voltage Module (LVM) in Roll2Rail specification [R2R16]. The research delves into coupling coil in scenarios involving short circuits and switching phases, emphasizing di/dt measurement. Integrated sensors on driver circuit demonstrate efficient short-circuit detection, and this study introduces sensor optimization through numerical simulation. Di/dt measurements through High Voltage (HV) main terminals to enable rapid detection during operational phases. A comparison of coupling coil technologies, by opposition of well-known Rogowski coils place around a conductor, highlights the possibility of using it in the region of DC minus terminals and make integration easier. This solution lowers the concerns about electrical isolation and this work highlights the potential of coupling coils in power electronics, suggesting different ways to explore for further research and development.