The thesis presented here deals with a model for the Integrated Gate Commutated Transistor (IGCT), which can be used for circuit simulation. The main interest focusses on the dynamic behaviour of this power electronic device. According to the physical characteristics of bipolar power devices, it is necessary to choose a mathematical approach which is based on semiconductor physics. Calculations performed with the model presented here, show a good agreement with corresponding experimental results. An interesting application example on the one hand and an object of a detailed analysis on the other hand is the series connection of IGCTs. It can be shown that even small differences between the IGCTs in series, or their gate drives respectively, yield considerable asymmetry regarding the blocking voltages of each single IGCT during turn off. Finally, a new concept for an active drive with a corresponding circuit, that ensures symmetry without applying large scale snubber circuits, is presented.
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The thesis presented here deals with a model for the Integrated Gate Commutated Transistor (IGCT), which can be used for circuit simulation. The main interest focusses on the dynamic behaviour of this power electronic device. According to the physical characteristics of bipolar power devices, it is necessary to choose a mathematical approach which is based on semiconductor physics. Calculations performed with the model presented here, show a good agreement with corresponding experimental results...
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