EFRoM

Extended frequency response analysis on rotating machines

Prof. Dr.-Ing. habil. Christoph M. Hackl, Prof. Dr.-Ing. Stephanie Uhrig, Prof. Dr.-Ing. Oliver Bohlen

High-performance three-phase AC machines are important components in our electrical energy supply chain and in the manufacturing industry.

Operational failures can have far-reaching consequences and often cause high costs that exceed the actual repair and maintenance costs many times over. Reliable, early fault detection is essential for cost-effective operation. Previous diagnostic methods are usually limited to one or very few recognisable fault types. SFRA (frequency response analysis) makes it possible to detect a wide variety of different faults in the electrical and magnetic circuit that occur during operation. The need for different measuring devices and configurations is eliminated. The analysis is based on a comparison of an existing fingerprint with the current measurement and requires expert knowledge.

Research activities are planned in the EFRoM project in order to facilitate and partially automate the evaluation. The particular strength of the project is the coverage of a wide range of power classes from a few kW to several hundred MW, which will be measured at the practice partners. In order to be able to develop an online monitoring system in the future, the influences of practical boundary conditions must be taken into account. To this end, the transferability of other methods such as impedance spectroscopy will also be investigated. The project proposed here includes the essential work required in terms of measurement setup, signal input and output, signal processing and automated data evaluation. However, irrespective of the realisation of online monitoring, the activities described here already offer significant added value for all users, particularly through the development of parameters that allow evaluation even without expert knowledge.

The overall objective of EFRoM is to analyse the technical feasibility of an FRA online monitoring system for three-phase machines.

Project Staff:

  • Lukas Ranzinger
  • Christian Rosenmüller
  • Andre Thommessen

General Project Information:

  • Project duration: 01.01.2024 - 31.12.2027
  • Funded by: Federal Ministry of Education and Research (BMBF)

Project partners:

  • OMICRON
  • Voestalpine Stahl GmbH
  • Lausitz Energie Kraftwerke AG
  • LEW Wasserkraft GmbH
  • Max-Planck-Institute for Plasma Physics IPP
  • University Stuttgart