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The IGBT3 technology with its trench cell and field stop is introduced for high voltage applications. The field stop concept has to be optimized, if modules with a high rated current are used in applications with a high stray inductance, to ensure the controllability of the voltage overshoot. The realized devices have greatly reduced losses in typical applications and allow an increase of the power output of converters.

This article describes an integration of knowledge based techniques into simulative Virtual Reality (VR) applications motivated using a virtual construction task. An abstract Knowledge Representation Layer (KRL) provides a base formalism for the integration of simulation semantics. The KRL approach is demonstrated using a generalized scene graph representation which introduces an abstract definition and implementation of geometric node interrelations.

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