Diagnostics of a selected AC drive using parallel processing

It is assumed in this paper that the aim of power electronic converter diagnostics is to find out the actual converter´s state and to automatically formulate a diagnosis to correct it. The result of the diagnostics´ operation was either confirmation of the converter´s correctness or detection and isolation of faults. To formulate the diagnosis the paper uses fast orthogonal transforms. A direct frequency converter is considered as an example in which the diagnostics was based on using an algorithm of a fast Haar transform. Control of the converter and its diagnostics were set up by employing parallel processing, which enabled real-time requirements to be met.