1. Field of the Invention
The invention proceeds from a method for controlling electric valves of a converter.
2. Discussion of Background
The invention refers to a prior art such as is disclosed by F. Bauer and H.-D. Heining, QUICK RESPONSE SPACE VECTOR CONTROL FOR A HIGH POWER THREE-LEVEL-INVERTER DRIVE SYSTEM, 3rd European Conference on Power Electronics and Applications, EPE Aachen, 9-12 Oct. 1989, Vol. 1, pages 417-420. A flux computer is used there for the field-oriented control of a converter-fed induction machine. GTO thyristors of a 3-level inverter are controled by means of pulse-duration modulation. Both the field-oriented control and the generation of the pulse patterns are implemented in a digital signal processor. In this case, each converter type requires a special control program or a special control circuit.