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Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets

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Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets. / Shah, Sahas Bikram; Osemwinyen, Osaruyi; Rasilo, Paavo; Belahcen, Anouar; Arkkio, Antero.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 67, No. 11, 11.2018, p. 2628-2634.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Shah, SB, Osemwinyen, O, Rasilo, P, Belahcen, A & Arkkio, A 2018, 'Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets' IEEE Transactions on Instrumentation and Measurement, vol. 67, no. 11, pp. 2628-2634. https://doi.org/10.1109/TIM.2018.2829321

APA

Shah, S. B., Osemwinyen, O., Rasilo, P., Belahcen, A., & Arkkio, A. (2018). Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets. IEEE Transactions on Instrumentation and Measurement, 67(11), 2628-2634. https://doi.org/10.1109/TIM.2018.2829321

Vancouver

Shah SB, Osemwinyen O, Rasilo P, Belahcen A, Arkkio A. Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets. IEEE Transactions on Instrumentation and Measurement. 2018 Nov;67(11):2628-2634. https://doi.org/10.1109/TIM.2018.2829321

Author

Shah, Sahas Bikram ; Osemwinyen, Osaruyi ; Rasilo, Paavo ; Belahcen, Anouar ; Arkkio, Antero. / Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets. In: IEEE Transactions on Instrumentation and Measurement. 2018 ; Vol. 67, No. 11. pp. 2628-2634.

Bibtex - Download

@article{82da016df54f48b5b5ef9ff6048deb18,
title = "Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets",
abstract = "Ferromagnetic cores of electrical machines and transformers are constructed from laminated electrical sheets to reduce eddy current losses. Burrs are formed at the edges of electrical sheets during punching and cutting. These burrs deteriorate the insulation of adjacent sheets, make interlaminar contacts and cause interlaminar currents to flow across the stack. It is essential to know the interlaminar conductivity and the size of the contacts to estimate additional losses in the electrical machine. In this paper, the size of the interlaminar contacts formed by the burrs is estimated using a novel thermographic measurement method and an analytical method. The initial temperature rise of the contacts is used in the analytical model to estimate the contact size. The electromagnetic and thermal finite element formulations validate the results obtained from the analytical method. Moreover, the results obtained from the measurement, the analytical method, and the finite element method are compared. The study shows that the initial temperature rise method can be used to estimate the interlaminar contact size and electromagnetic losses if the temperature is measured immediately after energizing the sheets.",
author = "Shah, {Sahas Bikram} and Osaruyi Osemwinyen and Paavo Rasilo and Anouar Belahcen and Antero Arkkio",
year = "2018",
month = "11",
doi = "10.1109/TIM.2018.2829321",
language = "English",
volume = "67",
pages = "2628--2634",
journal = "IEEE Transactions on Instrumentation and Measurement",
issn = "0018-9456",
publisher = "Institute of Electrical and Electronics Engineers",
number = "11",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Thermographic Measurement and Simulation of Power Losses Due to Inter-laminar Contacts in Electrical Sheets

AU - Shah, Sahas Bikram

AU - Osemwinyen, Osaruyi

AU - Rasilo, Paavo

AU - Belahcen, Anouar

AU - Arkkio, Antero

PY - 2018/11

Y1 - 2018/11

N2 - Ferromagnetic cores of electrical machines and transformers are constructed from laminated electrical sheets to reduce eddy current losses. Burrs are formed at the edges of electrical sheets during punching and cutting. These burrs deteriorate the insulation of adjacent sheets, make interlaminar contacts and cause interlaminar currents to flow across the stack. It is essential to know the interlaminar conductivity and the size of the contacts to estimate additional losses in the electrical machine. In this paper, the size of the interlaminar contacts formed by the burrs is estimated using a novel thermographic measurement method and an analytical method. The initial temperature rise of the contacts is used in the analytical model to estimate the contact size. The electromagnetic and thermal finite element formulations validate the results obtained from the analytical method. Moreover, the results obtained from the measurement, the analytical method, and the finite element method are compared. The study shows that the initial temperature rise method can be used to estimate the interlaminar contact size and electromagnetic losses if the temperature is measured immediately after energizing the sheets.

AB - Ferromagnetic cores of electrical machines and transformers are constructed from laminated electrical sheets to reduce eddy current losses. Burrs are formed at the edges of electrical sheets during punching and cutting. These burrs deteriorate the insulation of adjacent sheets, make interlaminar contacts and cause interlaminar currents to flow across the stack. It is essential to know the interlaminar conductivity and the size of the contacts to estimate additional losses in the electrical machine. In this paper, the size of the interlaminar contacts formed by the burrs is estimated using a novel thermographic measurement method and an analytical method. The initial temperature rise of the contacts is used in the analytical model to estimate the contact size. The electromagnetic and thermal finite element formulations validate the results obtained from the analytical method. Moreover, the results obtained from the measurement, the analytical method, and the finite element method are compared. The study shows that the initial temperature rise method can be used to estimate the interlaminar contact size and electromagnetic losses if the temperature is measured immediately after energizing the sheets.

U2 - 10.1109/TIM.2018.2829321

DO - 10.1109/TIM.2018.2829321

M3 - Article

VL - 67

SP - 2628

EP - 2634

JO - IEEE Transactions on Instrumentation and Measurement

JF - IEEE Transactions on Instrumentation and Measurement

SN - 0018-9456

IS - 11

ER -