TY - GEN
T1 - Reliability oriented design of low voltage electrical machines based on accelerated thermal aging tests
AU - Giangrande, Paolo
AU - Madonna, Vincenzo
AU - Galea, Michael
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/6
Y1 - 2020/6
N2 - In transport applications, electrical machines (EMs) are required to be highly reliable, in order to fulfill the intended mission profile over the expected lifetime. This task has been conventionally addressed through the adoption of safety-factors that might lead to an over-engineered EM. Only recently, few works have started championing a paradigm shift towards physics of failure methodologies, which allow to achieve an appropriate trade-off between optimal performance and demanded reliability figures. Thus, this paper proposes a reliability oriented methodology for low voltage (LV) EMs and outlines its critical implementation steps. Accelerated thermal aging (ATA) tests are preliminarily performed on custom made samples to assess the aging trend of the inter-turn insulation. The thermal endurance graph at different percentile values is then determined and a lifetime model suitable for variable duty motors is developed. Finally, this model is used to predict the inter-turn insulation cycles-to-failure of an EM installed on full-electric vehicle.
AB - In transport applications, electrical machines (EMs) are required to be highly reliable, in order to fulfill the intended mission profile over the expected lifetime. This task has been conventionally addressed through the adoption of safety-factors that might lead to an over-engineered EM. Only recently, few works have started championing a paradigm shift towards physics of failure methodologies, which allow to achieve an appropriate trade-off between optimal performance and demanded reliability figures. Thus, this paper proposes a reliability oriented methodology for low voltage (LV) EMs and outlines its critical implementation steps. Accelerated thermal aging (ATA) tests are preliminarily performed on custom made samples to assess the aging trend of the inter-turn insulation. The thermal endurance graph at different percentile values is then determined and a lifetime model suitable for variable duty motors is developed. Finally, this model is used to predict the inter-turn insulation cycles-to-failure of an EM installed on full-electric vehicle.
KW - Accelerated Aging Test (ATA)
KW - Design of Experiment
KW - Dielectric Breakdown
KW - Electrical Machine (EM) Insulation
KW - Physics of Failure (PoF)
KW - Safety-Critical Applications
UR - http://www.scopus.com/inward/record.url?scp=85091145638&partnerID=8YFLogxK
U2 - 10.1109/SPEEDAM48782.2020.9161974
DO - 10.1109/SPEEDAM48782.2020.9161974
M3 - Conference contribution
AN - SCOPUS:85091145638
T3 - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
SP - 448
EP - 453
BT - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
Y2 - 24 June 2020 through 26 June 2020
ER -
