Investigations on Different Polymers used for Insulation in E-Mobility Applications

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OriginalspracheEnglisch
Titel des Sammelwerks2023 IEEE Electrical Insulation Conference, EIC 2023
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
ISBN (elektronisch)9781665493413
ISBN (Print)978-1-6654-9342-0
PublikationsstatusVeröffentlicht - 2023
Veranstaltung2023 IEEE Electrical Insulation Conference, EIC 2023 - Quebec City, Kanada
Dauer: 18 Juni 202321 Juni 2023

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Name2023 IEEE Electrical Insulation Conference, EIC 2023

Abstract

Due to the demand for the reduction of greenhouse gas emissions, the importance of energy efficiency measures and energy conservation becomes a worldwide focus. The aim of reducing emissions is to limit the global rise of temperature in a short period to below 2 °C - if possible below 1.5 °C. In all areas of material usage and use of energy this goal is accompanied by the implementation of stricter rules. As a result, these developments also affect the energy and power sector. The increasing demand is accompanied by further development of production technology for e-motors. This development includes quality, life span and reduction of expenses. A common reason for unscheduled failures of rotating electrical machines are defects in the stator insulation. The production failures associated with the stator insulation failures are expensive and not economical. Because of this, a reliable insulation of stators is essential. Frequently occurring types of stator insulation faults are the delamination of the main insulation from the conductor, the delamination of the main insulation, micro voids, contamination, cracks, the deformation of the insulation, the variation of the thickness and slot discharges. Furthermore, the aging of the insulation material has a significant influence on the reliability of the stator insulation. Against this background, samples of polyamide 6 and polyamide 6.6 are investigated, which could possibly be used as slot insulation in a stator of an electric machine. For this purpose, the samples are subjected to thermal stress for different aging times, up to 1500 h, and investigated concerning the dielectric properties dissipation factor and permittivity. Due to the dependence of dielectric properties on temperature, these are measured at six different temperatures in a range between 25 °C and 155 °C. It has been shown for both materials that at a frequency of 50 Hz the dissipation factor tends to decrease with aging time. Air pockets and cracks due to thermal aging are the main cause of the decrease. For the temperatures and frequencies studied, polyamide 6 has a higher relative permittivity and dissipation factor compared to polyamide 6.6.

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Investigations on Different Polymers used for Insulation in E-Mobility Applications. / Stahl, Laureen; Werle, Peter.
2023 IEEE Electrical Insulation Conference, EIC 2023. Institute of Electrical and Electronics Engineers Inc., 2023. (2023 IEEE Electrical Insulation Conference, EIC 2023).

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Stahl, L & Werle, P 2023, Investigations on Different Polymers used for Insulation in E-Mobility Applications. in 2023 IEEE Electrical Insulation Conference, EIC 2023. 2023 IEEE Electrical Insulation Conference, EIC 2023, Institute of Electrical and Electronics Engineers Inc., 2023 IEEE Electrical Insulation Conference, EIC 2023, Quebec City, Kanada, 18 Juni 2023. https://doi.org/10.1109/EIC55835.2023.10177222
Stahl, L., & Werle, P. (2023). Investigations on Different Polymers used for Insulation in E-Mobility Applications. In 2023 IEEE Electrical Insulation Conference, EIC 2023 (2023 IEEE Electrical Insulation Conference, EIC 2023). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EIC55835.2023.10177222
Stahl L, Werle P. Investigations on Different Polymers used for Insulation in E-Mobility Applications. in 2023 IEEE Electrical Insulation Conference, EIC 2023. Institute of Electrical and Electronics Engineers Inc. 2023. (2023 IEEE Electrical Insulation Conference, EIC 2023). doi: 10.1109/EIC55835.2023.10177222
Stahl, Laureen ; Werle, Peter. / Investigations on Different Polymers used for Insulation in E-Mobility Applications. 2023 IEEE Electrical Insulation Conference, EIC 2023. Institute of Electrical and Electronics Engineers Inc., 2023. (2023 IEEE Electrical Insulation Conference, EIC 2023).
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AU - Stahl, Laureen

AU - Werle, Peter

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N2 - Due to the demand for the reduction of greenhouse gas emissions, the importance of energy efficiency measures and energy conservation becomes a worldwide focus. The aim of reducing emissions is to limit the global rise of temperature in a short period to below 2 °C - if possible below 1.5 °C. In all areas of material usage and use of energy this goal is accompanied by the implementation of stricter rules. As a result, these developments also affect the energy and power sector. The increasing demand is accompanied by further development of production technology for e-motors. This development includes quality, life span and reduction of expenses. A common reason for unscheduled failures of rotating electrical machines are defects in the stator insulation. The production failures associated with the stator insulation failures are expensive and not economical. Because of this, a reliable insulation of stators is essential. Frequently occurring types of stator insulation faults are the delamination of the main insulation from the conductor, the delamination of the main insulation, micro voids, contamination, cracks, the deformation of the insulation, the variation of the thickness and slot discharges. Furthermore, the aging of the insulation material has a significant influence on the reliability of the stator insulation. Against this background, samples of polyamide 6 and polyamide 6.6 are investigated, which could possibly be used as slot insulation in a stator of an electric machine. For this purpose, the samples are subjected to thermal stress for different aging times, up to 1500 h, and investigated concerning the dielectric properties dissipation factor and permittivity. Due to the dependence of dielectric properties on temperature, these are measured at six different temperatures in a range between 25 °C and 155 °C. It has been shown for both materials that at a frequency of 50 Hz the dissipation factor tends to decrease with aging time. Air pockets and cracks due to thermal aging are the main cause of the decrease. For the temperatures and frequencies studied, polyamide 6 has a higher relative permittivity and dissipation factor compared to polyamide 6.6.

AB - Due to the demand for the reduction of greenhouse gas emissions, the importance of energy efficiency measures and energy conservation becomes a worldwide focus. The aim of reducing emissions is to limit the global rise of temperature in a short period to below 2 °C - if possible below 1.5 °C. In all areas of material usage and use of energy this goal is accompanied by the implementation of stricter rules. As a result, these developments also affect the energy and power sector. The increasing demand is accompanied by further development of production technology for e-motors. This development includes quality, life span and reduction of expenses. A common reason for unscheduled failures of rotating electrical machines are defects in the stator insulation. The production failures associated with the stator insulation failures are expensive and not economical. Because of this, a reliable insulation of stators is essential. Frequently occurring types of stator insulation faults are the delamination of the main insulation from the conductor, the delamination of the main insulation, micro voids, contamination, cracks, the deformation of the insulation, the variation of the thickness and slot discharges. Furthermore, the aging of the insulation material has a significant influence on the reliability of the stator insulation. Against this background, samples of polyamide 6 and polyamide 6.6 are investigated, which could possibly be used as slot insulation in a stator of an electric machine. For this purpose, the samples are subjected to thermal stress for different aging times, up to 1500 h, and investigated concerning the dielectric properties dissipation factor and permittivity. Due to the dependence of dielectric properties on temperature, these are measured at six different temperatures in a range between 25 °C and 155 °C. It has been shown for both materials that at a frequency of 50 Hz the dissipation factor tends to decrease with aging time. Air pockets and cracks due to thermal aging are the main cause of the decrease. For the temperatures and frequencies studied, polyamide 6 has a higher relative permittivity and dissipation factor compared to polyamide 6.6.

KW - dissipation factor

KW - e-mobility

KW - permittivity

KW - polyamide

KW - polymer

KW - solid insulation

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U2 - 10.1109/EIC55835.2023.10177222

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AN - SCOPUS:85166385712

SN - 978-1-6654-9342-0

T3 - 2023 IEEE Electrical Insulation Conference, EIC 2023

BT - 2023 IEEE Electrical Insulation Conference, EIC 2023

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2023 IEEE Electrical Insulation Conference, EIC 2023

Y2 - 18 June 2023 through 21 June 2023

ER -

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