Details
| Original language | English |
|---|---|
| Pages (from-to) | 105418-105428 |
| Number of pages | 11 |
| Journal | IEEE ACCESS |
| Volume | 12 |
| Publication status | Published - 29 Jul 2024 |
Abstract
The calculation of magnetically induced vibrations in the stator of an electric machine involves, on the one hand, the determination of the magnetic forces originating from the air gap field and, on the other hand, the calculation of the mechanical eigenmodes and eigenfrequencies. This work presents a new method for the mechanical modelling of the stator using shell elements in 3D, as an extension of a recently published method using beam elements in 2D. It is applied to the case of a hydro generator with a complex mechanical construction, including the frame, and the results are validated by measurements performed on a 55, MVA machine. It is shown that the developed method allows a time-efficient calculation of the eigenmodes and eigenfrequencies, providing an advantageous alternative to the classical analytical and finite element (FE) methods typically used for this purpose. This outcome is particularly relevant and applicable to the design and optimisation of large electric machines, as well as troubleshooting vibration problems in existing machines.
Keywords
- eigenfrequencies, eigenmodes, Electric machines, finite element analysis, hydro generators, magnetic cores, modal analysis, numerical models, stators, vibrations
ASJC Scopus subject areas
- Computer Science(all)
- General Computer Science
- Materials Science(all)
- General Materials Science
- Engineering(all)
- General Engineering
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In: IEEE ACCESS, Vol. 12, 29.07.2024, p. 105418-105428.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - New Method Based on Shell Elements for Fast Calculation of the Stator Eigenfrequencies and Vibrations in Hydro Generators
AU - De Barros, Allan
AU - Ebrahimi, Amir
AU - Schwarz, Babette
AU - Ponick, Bernd
N1 - Publisher Copyright: © 2013 IEEE.
PY - 2024/7/29
Y1 - 2024/7/29
N2 - The calculation of magnetically induced vibrations in the stator of an electric machine involves, on the one hand, the determination of the magnetic forces originating from the air gap field and, on the other hand, the calculation of the mechanical eigenmodes and eigenfrequencies. This work presents a new method for the mechanical modelling of the stator using shell elements in 3D, as an extension of a recently published method using beam elements in 2D. It is applied to the case of a hydro generator with a complex mechanical construction, including the frame, and the results are validated by measurements performed on a 55, MVA machine. It is shown that the developed method allows a time-efficient calculation of the eigenmodes and eigenfrequencies, providing an advantageous alternative to the classical analytical and finite element (FE) methods typically used for this purpose. This outcome is particularly relevant and applicable to the design and optimisation of large electric machines, as well as troubleshooting vibration problems in existing machines.
AB - The calculation of magnetically induced vibrations in the stator of an electric machine involves, on the one hand, the determination of the magnetic forces originating from the air gap field and, on the other hand, the calculation of the mechanical eigenmodes and eigenfrequencies. This work presents a new method for the mechanical modelling of the stator using shell elements in 3D, as an extension of a recently published method using beam elements in 2D. It is applied to the case of a hydro generator with a complex mechanical construction, including the frame, and the results are validated by measurements performed on a 55, MVA machine. It is shown that the developed method allows a time-efficient calculation of the eigenmodes and eigenfrequencies, providing an advantageous alternative to the classical analytical and finite element (FE) methods typically used for this purpose. This outcome is particularly relevant and applicable to the design and optimisation of large electric machines, as well as troubleshooting vibration problems in existing machines.
KW - eigenfrequencies
KW - eigenmodes
KW - Electric machines
KW - finite element analysis
KW - hydro generators
KW - magnetic cores
KW - modal analysis
KW - numerical models
KW - stators
KW - vibrations
UR - http://www.scopus.com/inward/record.url?scp=85200210697&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2024.3435353
DO - 10.1109/ACCESS.2024.3435353
M3 - Article
AN - SCOPUS:85200210697
VL - 12
SP - 105418
EP - 105428
JO - IEEE ACCESS
JF - IEEE ACCESS
SN - 2169-3536
ER -