Power semiconductors: For medium voltage Converters — An Overview

Actual market of medium-voltage inverter for industrial applications: 1. Voltage Source Inverters cover a power range up to 30MW with high control dynamic demand IGBT-Modules: for standard applications IGCT/IGBT-semiconductor discs: for applications with high load cycling requirementsSiemens Converter-Portfolio Actual market of medium-voltage inverter for industrial applications:1a.3L-NPC:-suitable for multi motor drives with a common dc bus-easy implementation of regenerative operation capability-requires a sinus filter for standard machine applications1b.SC-HB:-single motor drives for a small to higher power range with high machine-voltages — suitable for Retrofit application due to a low machine winding stress caused by a high number of output voltage levels-requires a multi-winding transformer 2. Load-Commutated-Inverter (LCI) with thyristors:-Particularly cost effective for power demands above 20MW-low control dynamic performance 3. Current-Source-Inverter (CSI) with SGCTs:-single motor drives for middle power range applications-requires an output filter