Details
| Original language | English |
|---|---|
| Title of host publication | 2023 IEEE Electrical Insulation Conference, EIC 2023 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (electronic) | 9781665493413 |
| ISBN (print) | 978-1-6654-9342-0 |
| Publication status | Published - 2023 |
| Event | 2023 IEEE Electrical Insulation Conference, EIC 2023 - Quebec City, Canada Duration: 18 Jun 2023 → 21 Jun 2023 |
Publication series
| Name | 2023 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.
Keywords
- dissipation factor, e-mobility, permittivity, polyamide, polymer, solid insulation
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Safety, Risk, Reliability and Quality
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Polymers and Plastics
Sustainable Development Goals
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2023 IEEE Electrical Insulation Conference, EIC 2023. Institute of Electrical and Electronics Engineers Inc., 2023. (2023 IEEE Electrical Insulation Conference, EIC 2023).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigations on Different Polymers used for Insulation in E-Mobility Applications
AU - Stahl, Laureen
AU - Werle, Peter
PY - 2023
Y1 - 2023
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
UR - http://www.scopus.com/inward/record.url?scp=85166385712&partnerID=8YFLogxK
U2 - 10.1109/EIC55835.2023.10177222
DO - 10.1109/EIC55835.2023.10177222
M3 - Conference contribution
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 -