Method for operating a frequency converter, computer program to implement such a method and data medium and computer system, especially frequency converter on which such a computer program is saved or loaded

摘要

The method involves driving semiconductor switches (T1,T2,T3,T4,T5,T6) based on a modulation mode during exception or failure situation, particularly power supply voltage incursion or short-circuit. A measurement is carried out in network sided rods (24,26,28), to which power converter (10) is connected. An actual controlling of the semiconductor switch takes place in consideration of response cycle time points of the modulation mode and a logical linkage takes place with output of the measurement.