Details
| Original language | English |
|---|---|
| Title of host publication | 2024 International Conference on Electrical Machines, ICEM 2024 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (electronic) | 9798350370607 |
| ISBN (print) | 979-8-3503-7061-4 |
| Publication status | Published - 1 Sept 2024 |
| Event | 2024 International Conference on Electrical Machines, ICEM 2024 - Torino, Italy Duration: 1 Sept 2024 → 4 Sept 2024 |
Abstract
The vibrational behaviour of the stator of a hydro generator is an important aspect to be evaluated during the design of the machine, as it has an impact on its maintenance and life expectancy. This evaluation requires, in addition to the calculation of the exciting magnetic forces, the determination of the eigenfrequencies and eigenmodes of the stator structure. This task is particularly challenging for a large hydro generator due to its structural complexity, involving various components such as the laminated core, the ventilation air ducts, the frame, the winding, and the connections between these. This paper is dedicated to the experimental investigation of the influence of the stator winding on the mechanical eigenfrequencies of the stator assembly. For this purpose, a series of experimental modal analyses is performed in different assembly phases of a real 55 MVA generator. It turns out that, from the stator's point of view and by considering the typical winding insertion methods without global impregnation, the winding is only weakly coupled to the laminated core. Thus, the mass and the stiffness of the winding have no substantial effect on the system's eigenfrequencies. This finding contributes to the selection of appropriate simplifications and assumptions in the modelling of the complete stator including the winding for the prediction of structural vibrations in future works.
Keywords
- eigenfrequencies, eigenmodes, Electric machines, finite element method, hydroelectric generators, material properties, modal analysis, noise, stator winding, vibrations
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
Sustainable Development Goals
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2024 International Conference on Electrical Machines, ICEM 2024. Institute of Electrical and Electronics Engineers Inc., 2024.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Influence of the Stator Winding on the Mechanical Eigenfrequencies of Hydro Generators
AU - De Barros, Allan
AU - Weber, Wilhelm
AU - Ebrahimi, Amir
AU - Schwarz, Babette
AU - Ponick, Bernd
N1 - Publisher Copyright: © 2024 IEEE.
PY - 2024/9/1
Y1 - 2024/9/1
N2 - The vibrational behaviour of the stator of a hydro generator is an important aspect to be evaluated during the design of the machine, as it has an impact on its maintenance and life expectancy. This evaluation requires, in addition to the calculation of the exciting magnetic forces, the determination of the eigenfrequencies and eigenmodes of the stator structure. This task is particularly challenging for a large hydro generator due to its structural complexity, involving various components such as the laminated core, the ventilation air ducts, the frame, the winding, and the connections between these. This paper is dedicated to the experimental investigation of the influence of the stator winding on the mechanical eigenfrequencies of the stator assembly. For this purpose, a series of experimental modal analyses is performed in different assembly phases of a real 55 MVA generator. It turns out that, from the stator's point of view and by considering the typical winding insertion methods without global impregnation, the winding is only weakly coupled to the laminated core. Thus, the mass and the stiffness of the winding have no substantial effect on the system's eigenfrequencies. This finding contributes to the selection of appropriate simplifications and assumptions in the modelling of the complete stator including the winding for the prediction of structural vibrations in future works.
AB - The vibrational behaviour of the stator of a hydro generator is an important aspect to be evaluated during the design of the machine, as it has an impact on its maintenance and life expectancy. This evaluation requires, in addition to the calculation of the exciting magnetic forces, the determination of the eigenfrequencies and eigenmodes of the stator structure. This task is particularly challenging for a large hydro generator due to its structural complexity, involving various components such as the laminated core, the ventilation air ducts, the frame, the winding, and the connections between these. This paper is dedicated to the experimental investigation of the influence of the stator winding on the mechanical eigenfrequencies of the stator assembly. For this purpose, a series of experimental modal analyses is performed in different assembly phases of a real 55 MVA generator. It turns out that, from the stator's point of view and by considering the typical winding insertion methods without global impregnation, the winding is only weakly coupled to the laminated core. Thus, the mass and the stiffness of the winding have no substantial effect on the system's eigenfrequencies. This finding contributes to the selection of appropriate simplifications and assumptions in the modelling of the complete stator including the winding for the prediction of structural vibrations in future works.
KW - eigenfrequencies
KW - eigenmodes
KW - Electric machines
KW - finite element method
KW - hydroelectric generators
KW - material properties
KW - modal analysis
KW - noise
KW - stator winding
KW - vibrations
UR - http://www.scopus.com/inward/record.url?scp=85207507803&partnerID=8YFLogxK
U2 - 10.1109/ICEM60801.2024.10700304
DO - 10.1109/ICEM60801.2024.10700304
M3 - Conference contribution
AN - SCOPUS:85207507803
SN - 979-8-3503-7061-4
BT - 2024 International Conference on Electrical Machines, ICEM 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2024 International Conference on Electrical Machines, ICEM 2024
Y2 - 1 September 2024 through 4 September 2024
ER -