Evaluation of the influence of rotor axial air ducts on condition monitoring of induction motors

Sungho Lee, Jongman Hong, Sang Bin Lee, Ernesto Wiedenbrug, Mike Teska, Heedong Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

Rotor axial air ducts are used in large motors for cooling and reduction of weight and material. The rotor axial ducts can produce twice slip-frequency, 2sfs, components in the vibration, or current spectrum that can be misinterpreted as induction motor rotor faults. There is currently no practical solution to the air duct-induced false positive indications, which is an on-going problem in the field. However, there are only a few publications that report the issues caused by rotor axial ducts. In this paper, the influence of the rotor air ducts on motor condition monitoring is analyzed, and investigated through testing in the field on 6.6kV motors and in the lab. The experimental study shows that the magnitude of the 2sfs component due to axial ducts depend on the design, material, construction, and operating conditions of the motor. It is also shown that the 2sfs component can even decrease with broken bars depending on the fault position relative to the ducts, which makes on-line condition monitoring difficult. Guidelines for reliable motor testing and interpretation of test results are also provided.

Original languageEnglish
Title of host publication2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
Pages3016-3023
Number of pages8
DOIs
Publication statusPublished - 2012 Dec 17
Event4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh, NC, United States
Duration: 2012 Sep 152012 Sep 20

Publication series

Name2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012

Other

Other4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
CountryUnited States
CityRaleigh, NC
Period12/9/1512/9/20

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ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Lee, S., Hong, J., Lee, S. B., Wiedenbrug, E., Teska, M., & Kim, H. (2012). Evaluation of the influence of rotor axial air ducts on condition monitoring of induction motors. In 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012 (pp. 3016-3023). [6342360] (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012). https://doi.org/10.1109/ECCE.2012.6342360