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Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance

  • 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, L d , 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.

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Metadaten
Author:Jongman Hong, Sang Bin Lee, Christian Kral, Anton Haumer
DOI:https://doi.org/10.1109/DEMPED.2011.6063651
ISBN:978-1-4244-9301-2
ISBN:978-1-4244-9303-6
Parent Title (English):8th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics & Drives (SDEMPED), 2011 // 05. - 08.09.2011, Bologna, Italy
Publisher:IEEE
Place of publication:Piscataway, NJ
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2011
Release Date:2022/12/10
Tag:Airgap Eccentricity; Condition Monitoring; Diagnostics; Magnetic Saturation; Motor Current Signature Analysis (MCSA); Permanent Magnet Synchronous Motor; fault location; inductance; load (electric); machine testing; permanent magnet motors; synchronous motor protection
First Page:378
Last Page:384
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Labor Elektrische Maschinen und Antriebstechnik
Begutachtungsstatus:peer-reviewed
Publication:Externe Publikationen
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG