TY - JOUR
T1 - Detection of airgap eccentricity for induction motors using the single-phase rotation test
AU - Hyun, Doosoo
AU - Lee, Sungho
AU - Hong, Jongman
AU - Bin Lee, Sang
AU - Nandi, Subhasis
N1 - Funding Information:
Manuscript received November 4, 2011; revised February 28, 2012; accepted April 26, 2012. Date of publication May 25, 2012; date of current version July 27, 2012. This work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (No. 20114010203010). Paper no. TEC-00584-2011.
PY - 2012
Y1 - 2012
N2 - The single-phase rotation test (SPRT) is a simple and reliable offline test frequently used for detecting problems in the rotor cage of induction motors without motor disassembly. Airgap eccentricity due to bearing degradation, shaft flexing, etc., is another problem that is difficult to detect, which can cause catastrophic motor failure. In this paper, the feasibility of using the SPRT for detecting eccentricity, which has not been reported before, is investigated. The variation in the inductive component as a function of rotor position and time under static, dynamic, and mixed eccentricity conditions is analyzed. It is shown that airgap eccentricity can be detected in addition to rotor cage problems with the SPRT. An experimental study on a 7.5-Hp induction motor under controlled eccentricity and broken bar conditions shows that airgap eccentricity can be reliably detected with high sensitivity and distinguished from broken rotor bars.
AB - The single-phase rotation test (SPRT) is a simple and reliable offline test frequently used for detecting problems in the rotor cage of induction motors without motor disassembly. Airgap eccentricity due to bearing degradation, shaft flexing, etc., is another problem that is difficult to detect, which can cause catastrophic motor failure. In this paper, the feasibility of using the SPRT for detecting eccentricity, which has not been reported before, is investigated. The variation in the inductive component as a function of rotor position and time under static, dynamic, and mixed eccentricity conditions is analyzed. It is shown that airgap eccentricity can be detected in addition to rotor cage problems with the SPRT. An experimental study on a 7.5-Hp induction motor under controlled eccentricity and broken bar conditions shows that airgap eccentricity can be reliably detected with high sensitivity and distinguished from broken rotor bars.
KW - Condition monitoring
KW - eccentricity
KW - electrical fault detection
KW - inductance measurement
KW - induction motors
KW - preventive maintenance
KW - spectral analysis
KW - testing
UR - http://www.scopus.com/inward/record.url?scp=84864629616&partnerID=8YFLogxK
U2 - 10.1109/TEC.2012.2198218
DO - 10.1109/TEC.2012.2198218
M3 - Article
AN - SCOPUS:84864629616
SN - 0885-8969
VL - 27
SP - 689
EP - 696
JO - IEEE Transactions on Energy Conversion
JF - IEEE Transactions on Energy Conversion
IS - 3
M1 - 6205361
ER -