Asynchronous Motor - Failure of Rotor Lamination Teeth
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During full load testing of moto-compressor, abnormal vibration were detected. Failure was observed on electrical motor rotor lamination teeth. Deep experimental analysis and metallurgical investigations revealed a high cycle fatigue to be the root cause of the failure. Theoretical and experimental analyses involving modal analysis, electro-magnetic simulation, static and dynamic response and fatigue evaluation were performed. Issue resolution is based on the rotor lamination teeth geometrical modification and rotor/stator teeth ratio optimization. This case study describes the root cause analysis from theoretical to experimental perspectives.
Coudray, Xavier; Delhaye, Guillaume; Velly, Nicolas; Quoix, Bernard; Gelin, Alain; Lucas, Antoine (2016). Asynchronous Motor - Failure of Rotor Lamination Teeth. Turbomachinery Laboratories, Texas A&M Engineering Experiment Station. Available electronically from