A Simplified On-State Voltage Measurement Circuit for Power Semiconductor Devices

This letter proposes a simplified converter-level on-state voltage measurement circuit for power semiconductor devices, without an external power supply and self-power circuit. It has a reduced component count and circuit complexity, and retains the plug-and-play feature, comparable measurement accuracy, and dynamic response as recently reported methods. A proof-of-concept prototype is developed and tested for a three-phase inverter application.