Local Demagnetization Fault Diagnosis Method of Permanent Magnet Synchronous Motor Based on Transient Analysis of Stator Back EMF Attenuation

Authors

  • Fengmei Shen, Celso Bation Co, Anton Louise De Ocampo，Rowell Hernandez

Keywords:

permanent magnet synchronous motor; Stator; Back EMF attenuation; Local demagnetization; flux linkage

Abstract

Permanent magnet demagnetization can impair motor performance, causing torque fluctuations and efficiency drops, masking fault signatures. To address this, we propose a fault detection method based on stator back electromotive force (EMF) attenuation transients in permanent magnet synchronous motors. Our approach involves modeling the motor's mechanical and electrical systems, formulating voltage equations relating rotor and stator fluxes. We calculate the relationship between stator phase voltages during EMF attenuation, ignoring zero sequence effects, to analyze attenuation patterns. By observing the magnetic EMF from a demagnetization perspective and applying coordinate transformation, we extract the rotor's magnetic flux. Comparing observed flux with thresholds enables fault diagnosis. Experimental results demonstrate that our method achieves high accuracy (mean square error <1) and reliability (AUC near 1) in detecting local demagnetization faults in these motors

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Published

23.07.2024

How to Cite

Fengmei Shen. (2024). Local Demagnetization Fault Diagnosis Method of Permanent Magnet Synchronous Motor Based on Transient Analysis of Stator Back EMF Attenuation. International Journal of Intelligent Systems and Applications in Engineering, 12(4), 1936–1945. Retrieved from https://www.ijisae.org/index.php/IJISAE/article/view/6512

Issue

Vol. 12 No. 4 (2024)

Section

Research Article

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