TY - GEN
T1 - Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance
AU - Hong, Jongman
AU - Lee, Sang Bin
AU - Kral, Christian
AU - Haumer, Anton
PY - 2011
Y1 - 2011
N2 - The majority of the work performed for detecting eccentricity faults for permanent magnet synchronous motors (PMSM) focus on motor current signature analysis (MCSA), as it provides continuous on-line monitoring with existing current sensors. However, MCSA cannot be applied under nonstationary conditions and cannot distinguish faults with load torque oscillations, which are limitations for many PMSM drive applications. In this paper, it is shown that the d-axis inductance, Ld, decreases with increase in the severity of eccentricity due to the change in the degree of magnetic saturation, and it is proposed as a new fault indicator. The inverter can be used to perform a standstill test automatically whenever the motor is stopped, to measure L d for eccentricity testing independent of load variations or oscillations, which is not possible with MCSA. An FE and experimental study on a 10hp PMSM verifies that eccentricity can be detected independent of the load with high sensitivity and reliability.
AB - The majority of the work performed for detecting eccentricity faults for permanent magnet synchronous motors (PMSM) focus on motor current signature analysis (MCSA), as it provides continuous on-line monitoring with existing current sensors. However, MCSA cannot be applied under nonstationary conditions and cannot distinguish faults with load torque oscillations, which are limitations for many PMSM drive applications. In this paper, it is shown that the d-axis inductance, Ld, decreases with increase in the severity of eccentricity due to the change in the degree of magnetic saturation, and it is proposed as a new fault indicator. The inverter can be used to perform a standstill test automatically whenever the motor is stopped, to measure L d for eccentricity testing independent of load variations or oscillations, which is not possible with MCSA. An FE and experimental study on a 10hp PMSM verifies that eccentricity can be detected independent of the load with high sensitivity and reliability.
KW - Airgap Eccentricity
KW - Condition Monitoring
KW - Diagnostics
KW - Magnetic Saturation
KW - Motor Current Signature Analysis (MCSA)
KW - Permanent Magnet Synchronous Motor
UR - http://www.scopus.com/inward/record.url?scp=81255210144&partnerID=8YFLogxK
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U2 - 10.1109/DEMPED.2011.6063651
DO - 10.1109/DEMPED.2011.6063651
M3 - Conference contribution
AN - SCOPUS:81255210144
SN - 9781424493036
T3 - SDEMPED 2011 - 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives
SP - 378
EP - 384
BT - SDEMPED 2011 - 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives
T2 - 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2011
Y2 - 5 September 2011 through 8 September 2011
ER -