Study of thermal stresses developed during a fatigue test on an electrical motor rotor cage

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Study of thermal stresses developed during a fatigue test on an electrical motor rotor cage. / Climente-Alarcon, Vicente; Arkkio, Antero; Antonino-Daviu, Jose.

In: INTERNATIONAL JOURNAL OF FATIGUE, Vol. 120, 01.03.2019, p. 56-64.

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@article{f77a6615a6a5499bbb87f5b321e106af,
title = "Study of thermal stresses developed during a fatigue test on an electrical motor rotor cage",
abstract = "Structural defects in the rotor cage of large electrical machines significantly impact their expected operational lifetime. This work presents the results of simulating the thermal stresses developed in a rotor cage during a fatigue test in which a bar breakage was achieved. A combined model featuring electrical, thermal and mechanical stages as well as three different meshes reflecting a progressing narrowing of one of the bars in its junction to the end ring are used for this purpose. The experimentally implemented startup and plug stopping transients are reproduced as well as, for comparison, the stall operation. The resulting stress levels are in agreement with the progression of the damage and concur with the stator measurements. Based on the analysis of the simulated rotor magnitudes, a strategy to diminish the thermal stresses in a damaged cage is proposed.",
keywords = "Finite element analysis, Induction motors, Prognostics and health management, Rotors, Thermal stresses, Transient analysis",
author = "Vicente Climente-Alarcon and Antero Arkkio and Jose Antonino-Daviu",
year = "2019",
month = "3",
day = "1",
doi = "10.1016/j.ijfatigue.2018.11.003",
language = "English",
volume = "120",
pages = "56--64",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

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TY - JOUR

T1 - Study of thermal stresses developed during a fatigue test on an electrical motor rotor cage

AU - Climente-Alarcon, Vicente

AU - Arkkio, Antero

AU - Antonino-Daviu, Jose

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Structural defects in the rotor cage of large electrical machines significantly impact their expected operational lifetime. This work presents the results of simulating the thermal stresses developed in a rotor cage during a fatigue test in which a bar breakage was achieved. A combined model featuring electrical, thermal and mechanical stages as well as three different meshes reflecting a progressing narrowing of one of the bars in its junction to the end ring are used for this purpose. The experimentally implemented startup and plug stopping transients are reproduced as well as, for comparison, the stall operation. The resulting stress levels are in agreement with the progression of the damage and concur with the stator measurements. Based on the analysis of the simulated rotor magnitudes, a strategy to diminish the thermal stresses in a damaged cage is proposed.

AB - Structural defects in the rotor cage of large electrical machines significantly impact their expected operational lifetime. This work presents the results of simulating the thermal stresses developed in a rotor cage during a fatigue test in which a bar breakage was achieved. A combined model featuring electrical, thermal and mechanical stages as well as three different meshes reflecting a progressing narrowing of one of the bars in its junction to the end ring are used for this purpose. The experimentally implemented startup and plug stopping transients are reproduced as well as, for comparison, the stall operation. The resulting stress levels are in agreement with the progression of the damage and concur with the stator measurements. Based on the analysis of the simulated rotor magnitudes, a strategy to diminish the thermal stresses in a damaged cage is proposed.

KW - Finite element analysis

KW - Induction motors

KW - Prognostics and health management

KW - Rotors

KW - Thermal stresses

KW - Transient analysis

UR - http://www.scopus.com/inward/record.url?scp=85056218231&partnerID=8YFLogxK

U2 - 10.1016/j.ijfatigue.2018.11.003

DO - 10.1016/j.ijfatigue.2018.11.003

M3 - Article

VL - 120

SP - 56

EP - 64

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

ER -

ID: 30079992