Temperature influence on core losses and magnetization demand of electrical steel sheets using adapted Epstein frame and ring probe
- In this paper, the influence of temperatures up to
250 °C on core losses and magnetization demand of electrical
steel sheets is illustrated. Therefore, measurements are made
using an adopted high-temperature Epstein frame and a stator
core as a ring probe. Three different electrical steel sheet grades,
M330-50A, M530-50A and NO20-15, and a stator core are
tested. Magnetic property measurements are performed at
various frequencies from DC to 1.2 kHz with a defined
sinusoidal waveform of magnetic polarization. This covers a
wide range of electric motor applications from industrial drives
to electric vehicle drives. With increasing temperature,
magnetization demand rises significantly in medium
polarization range. For specific core losses, a loss separation is
performed using the Jordan approach, separating specific
hysteresis and specific eddy current losses to determine the
temperature influence on each loss component. The
temperature behavior of the specific electrical resistivity of
electrical steel sheets isIn this paper, the influence of temperatures up to
250 °C on core losses and magnetization demand of electrical
steel sheets is illustrated. Therefore, measurements are made
using an adopted high-temperature Epstein frame and a stator
core as a ring probe. Three different electrical steel sheet grades,
M330-50A, M530-50A and NO20-15, and a stator core are
tested. Magnetic property measurements are performed at
various frequencies from DC to 1.2 kHz with a defined
sinusoidal waveform of magnetic polarization. This covers a
wide range of electric motor applications from industrial drives
to electric vehicle drives. With increasing temperature,
magnetization demand rises significantly in medium
polarization range. For specific core losses, a loss separation is
performed using the Jordan approach, separating specific
hysteresis and specific eddy current losses to determine the
temperature influence on each loss component. The
temperature behavior of the specific electrical resistivity of
electrical steel sheets is measured and used to calculate the
physical specific eddy current losses. After separation, specific
hysteresis losses also show a significant temperature influence.…


| Author: | Martin Regnet, Thomas Schäufele, Armin Dietz, Bernd Löhlein |
|---|---|
| DOI: | https://doi.org/10.1109/edpc60603.2023.10372149 |
| ISBN: | 979-8-3503-7049-2 |
| Parent Title (English): | 2023 13th International Electric Drives Production Conference (EDPC) |
| Publisher: | IEEE |
| Document Type: | conference proceeding (article) |
| Language: | English |
| Reviewed: | Begutachtet/Reviewed |
| Release Date: | 2024/08/13 |
| Tag: | Epstein frame; electrical steel sheet; magnetization demand; specific core losses; temperature influence |
| Pagenumber: | 7 |
| Konferenzangabe: | 2023 13th International Electric Drives Production Conference (EDPC), 29-30 November 2023, Regensburg, Germany |
| institutes: | Fakultät für Elektrotechnik Feinwerktechnik Informationstechnik |
| Institut für leistungselektronische Systeme ELSYS | |
| Research Themes: | Energie & Ressourcen |
