Online efficiency diagnostic of three phase asynchronous machines from start up data

Authors

  • J. Bacher Institute of Drive Technology and Electrical Machines E.A.M, University of Technology Graz Author
  • F. Waldhart Institute of Drive Technology and Electrical Machines E.A.M, University of Technology Graz Author

DOI:

https://doi.org/10.24084/repqj07.386

Keywords:

Three phase induction machine, online efficiency monitoring, start up data, maintenance costs

Abstract

In this paper a real time efficiency determination of three phase asynchronous machines is described. Such an online tool improves the reliability of the machines and its maintenance costs. There are various methods to determine the efficiency of three phase induction machines. But all of them have in common that they are to inaccurate or they are impracticable. Here, the machine efficiency will be derived from start up data. For that purpose the variation with time of all stator currents and all stator voltages have to been measured. No additional data and no additional measuring devices, such rotor speed or torque measurement shaft are needed.

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Published

2024-01-24

Issue

Vol. 7 No. 1 (2009)

Section

Articles