Detection and Classification of Rotor Demagnetization and Eccentricity Faults for PM Synchronous Machines

Hong Jongman, Doosoo Hyun, Tae-June Kang, Sang Bin Lee (Vortragende:r), Christian Kral, Anton Haumer

Publikation: Beitrag in Buch oder TagungsbandVortrag mit Beitrag in Tagungsband


Condition monitoring of rotor problems such as demagnetization and eccentricity in permanent magnet synchronous motors (PMSM) is essential for guaranteeing high motor performance, efficiency, and reliability. However, there are many limitations to the off-line and on-line methods currently used for PMSM rotor quality assessment. In this paper, an inverter-embedded technique for automated detection and classification of PMSM rotor faults is proposed as an alternative. The main concept is to use the inverter to perform a test whenever the motor is stopped, to detect rotor faults independent of load torque oscillations, which is not possible with MCSA. The rotor d-axis is excited with a dc+ac pulse, and the variation in the inductance pattern due to the change in the degree of magnetic saturation caused by demagnetization and/or eccentricity is observed. An experimental study on a 10hp PMSM verifies that demagnetization and eccentricity can be detected and classified independent of the load with high sensitivity.
TitelECCE Conference Proceedings
PublikationsstatusVeröffentlicht - 2011
VeranstaltungIEEE Energy Conversion Congress & Exposition, ECCE 2012 -
Dauer: 15 Sept. 201220 Sept. 2012


KonferenzIEEE Energy Conversion Congress & Exposition, ECCE 2012

Research Field

  • Nicht definiert


  • AC Machine; Condition Monitoring; d-axis Inductance; Demagnetization; Eccentricity; Magnetic Saturation; Motor Current Signature Anlaysis (MCSA); Off-line Testing; Permanent Magnet (PM); Synchronous Motor (SM)


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