Efficiency assessment of induction motors operating under different faulty conditions

Maeva Garcia, Panagiotis Panagiotou, Jose Alfonso Antonino-Daviu, Konstantinos N.N. Gyftakis

Research output: Contribution to journalArticlepeer-review


Fault diagnosis in induction motors has drawn an increasing attention among the electrical engineering community. Diverse techniques have been developed in order to detect the presence of possible faults in their early stages, so that forced outages of the motor and economic consequences can be avoided. However, little attention has been paid to the implications of the presence of these faults in terms of motor efficiency reduction. The efficiency drops caused by the existence of faults or anomalies in the motor can lead to economic losses that can be even greater than those caused by eventual motor outages. In spite of this fact, many industrial users are not aware of the efficiency repercussions of the operation under non-healthy conditions. As a consequence, it becomes necessary to accurately study and quantify the efficiency decrements caused by the presence of possible failures. This paper analyses how different non-catastrophic failures influence the value of motor efficiency; different types of rotor faults as well as bearing failures are considered. In this work it is shown that indeed the presence of these failures strongly affects the motor efficiency and may have serious implications on the motor performance and operational cost.

Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Early online date13 Dec 2018
Publication statusE-pub ahead of print - 13 Dec 2018


  • Bars
  • bearings
  • broken bars
  • Economics
  • efficiency
  • fault detection
  • Induction motors
  • induction motors
  • Industries
  • Load modeling
  • reliability
  • Rotors
  • Stator cores

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