Investigation on the high power three-level DC-link voltage source inverter equipped with IGCTs

The feature of the IGCTs makes them have excellent performance in high-voltage high-current field. And the high integration of the drives and the devices makes it very convenient to use them. In the adjustable speed drive systems, the high power three-level voltage source inverters equipped with IGCTs are widely used now. In this paper, the main topological structures used presently in the inverters with IGCTs are analyzed. Based on the theory analysis and the system simulation, a high power three-level converter with IGCTs is designed. With the experiment of IGCT device and the converter system, the working performance of the converter is verified. The experiment results show that the converter reaches the design requirement and has excellent performance