Details
| Original language | English |
|---|---|
| Title of host publication | 2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 2443-2450 |
| Number of pages | 8 |
| ISBN (electronic) | 9784886864406 |
| ISBN (print) | 979-8-3503-7910-5 |
| Publication status | Published - 26 Nov 2024 |
| Event | 27th International Conference on Electrical Machines and Systems, ICEMS 2024 - Fukuoka, Japan Duration: 26 Nov 2024 → 29 Nov 2024 |
Abstract
A crucial task for the assessment of magnetically induced vibrations in electrical machines is the determination of the eigenmodes and eigenfrequencies of the stator. The mechanical model for this purpose is usually based on the assumption of equivalent material properties to homogenize the laminated stator core. However, there are few references available in the literature on the appropriate equivalent parameters in the specific case of hydro generators. The objective of this paper is to determine the necessary equivalent parameters to represent the mechanical properties of the stator core of hydro generators under different temperatures and clamping pressures. This is achieved by developing a prototype of a stator core sector, on which several experimental modal analyses are performed under laboratory conditions. The experimental data are used to calibrate a calculation model, providing the equivalent material parameters which best fit the measurements. The main findings of this work are the empirical values of the Young's and shear moduli involving the component perpendicular to the laminations' plane, as well as their dependence on the temperature and clamping pressure. The results can be employed as inputs to the mechanical model of the complete machine in future works.
Keywords
- eigenfrequencies, Hydroelectric generators, material properties, modal analysis, vibrations
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
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2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024. Institute of Electrical and Electronics Engineers Inc., 2024. p. 2443-2450.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Determination of the Equivalent Mechanical Properties of the Stator Core for Vibration Analysis in Hydro Generators
AU - De Barros, Allan
AU - Ebrahimi, Amir
AU - Schwarz, Babette
AU - Ponick, Bernd
N1 - Publisher Copyright: © 2024 The Institute of Electrical Engineers of Japan.
PY - 2024/11/26
Y1 - 2024/11/26
N2 - A crucial task for the assessment of magnetically induced vibrations in electrical machines is the determination of the eigenmodes and eigenfrequencies of the stator. The mechanical model for this purpose is usually based on the assumption of equivalent material properties to homogenize the laminated stator core. However, there are few references available in the literature on the appropriate equivalent parameters in the specific case of hydro generators. The objective of this paper is to determine the necessary equivalent parameters to represent the mechanical properties of the stator core of hydro generators under different temperatures and clamping pressures. This is achieved by developing a prototype of a stator core sector, on which several experimental modal analyses are performed under laboratory conditions. The experimental data are used to calibrate a calculation model, providing the equivalent material parameters which best fit the measurements. The main findings of this work are the empirical values of the Young's and shear moduli involving the component perpendicular to the laminations' plane, as well as their dependence on the temperature and clamping pressure. The results can be employed as inputs to the mechanical model of the complete machine in future works.
AB - A crucial task for the assessment of magnetically induced vibrations in electrical machines is the determination of the eigenmodes and eigenfrequencies of the stator. The mechanical model for this purpose is usually based on the assumption of equivalent material properties to homogenize the laminated stator core. However, there are few references available in the literature on the appropriate equivalent parameters in the specific case of hydro generators. The objective of this paper is to determine the necessary equivalent parameters to represent the mechanical properties of the stator core of hydro generators under different temperatures and clamping pressures. This is achieved by developing a prototype of a stator core sector, on which several experimental modal analyses are performed under laboratory conditions. The experimental data are used to calibrate a calculation model, providing the equivalent material parameters which best fit the measurements. The main findings of this work are the empirical values of the Young's and shear moduli involving the component perpendicular to the laminations' plane, as well as their dependence on the temperature and clamping pressure. The results can be employed as inputs to the mechanical model of the complete machine in future works.
KW - eigenfrequencies
KW - Hydroelectric generators
KW - material properties
KW - modal analysis
KW - vibrations
UR - http://www.scopus.com/inward/record.url?scp=105002384419&partnerID=8YFLogxK
U2 - 10.23919/ICEMS60997.2024.10921170
DO - 10.23919/ICEMS60997.2024.10921170
M3 - Conference contribution
AN - SCOPUS:105002384419
SN - 979-8-3503-7910-5
SP - 2443
EP - 2450
BT - 2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 27th International Conference on Electrical Machines and Systems, ICEMS 2024
Y2 - 26 November 2024 through 29 November 2024
ER -