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A Time-Saving Approach for the Thermal Lifetime Evaluation of Low Voltage Electrical Machines

Madonna, Vincenzo; Giangrande, Paolo; Migliazza, Giovanni; Buticchi, Giampaolo; Galea, Michael


Vincenzo Madonna

Paolo Giangrande

Giovanni Migliazza

Giampaolo Buticchi

Michael Galea


Modern electrical machines, such as those employed in transportation applications are required to provide very high performance in terms of power (and torque) density and efficiency. The reality, however, is that the more these machines are “pushed“ in relation to power density, the more is the probability of failure of their insulation systems, through enhanced electrical and thermal stresses. On the other hand, regardless the power density level, the electrical machine still needs to respect the certification processes set by the international standards and procedures. Unfortunately, today reliability and lifetime are still not considered as main design objective functions right from the start of the design process. This is a direct result of a gap in knowledge in terms of the precise understanding of failure mechanisms. If physics of failure models are available, then reliability can be included at all design stages. Therefore, this paper proposes a method that shortens the time demanded for the thermal lifetime evaluation procedure or qualification of low voltage electrical machines. The theory behind the method is presented and then experimentally validated on custom designed specimens.

Journal Article Type Article
Publication Date Dec 5, 2019
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Electronic ISSN 1557-9948
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
APA6 Citation Madonna, V., Giangrande, P., Migliazza, G., Buticchi, G., & Galea, M. (2019). A Time-Saving Approach for the Thermal Lifetime Evaluation of Low Voltage Electrical Machines. IEEE Transactions on Industrial Electronics,
Keywords Design of experiments, Dielectric breakdown, Dielectric losses, Electrical machines, Electric motors, Insulation, Physics of failure, Thermal factors, Thermal stresses
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