Kurzschlußstrombegrenzung für eine Stromrichterschaltung mit einem kapazitiven Speicher

摘要

The invention relates to a short-circuit current limiter, comprising at least one power semiconductor switch (T1, ..., T6) with a corresponding free-wheeling diode (D1, ..., D6) as well as at least one capacitive accumulator (C), which create a short-circuit mesh in the event of a short circuit. According to the invention at least one passive semiconductor current limiter (12) made of silicon carbide is arranged in said short-circuit mesh. In this way, in the event of a short circuit the short-circuit current is limited in a very short time to the limit current (Ilimit) of the passive semiconductor current limiter (12) while placing very little load on the power semiconductor switch (T1, ..., T6).