EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES
Usually, electrical machines have a metallic cylinder made up of a compacted stack of thin metal plates (referred as laminated core) assembled with an interference fit on the shaft. The laminated structure is required to improve the electrical performance of the machine and, besides adding inertia,...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Taylor's University
2013-08-01
|
Series: | Journal of Engineering Science and Technology |
Subjects: | |
Online Access: | http://jestec.taylors.edu.my/Vol%208%20Issue%204%20August%2013/Volume%20(8)%20Issue%20(4)%20457-471.pdf |
id |
doaj-76b7d0119fdb419a828e01376d176647 |
---|---|
record_format |
Article |
spelling |
doaj-76b7d0119fdb419a828e01376d1766472020-11-24T23:55:32ZengTaylor's UniversityJournal of Engineering Science and Technology1823-46902013-08-0184457471EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINESHIDERALDO L. V. SANTOSMARCO A. LUERSENCARLOS A. BAVASTRIUsually, electrical machines have a metallic cylinder made up of a compacted stack of thin metal plates (referred as laminated core) assembled with an interference fit on the shaft. The laminated structure is required to improve the electrical performance of the machine and, besides adding inertia, also enhances the stiffness of the system. Inadequate characterization of this element may lead to errors when assessing the dynamic behavior of the rotor. The aim of this work was therefore to evaluate three beam models used to represent the laminated core of rotating electrical machines. The following finite element beam models are analyzed: (i) an “equivalent diameter model”, (ii) an “unbranched model” and (iii) a “branched model”. To validate the numerical models, experiments are performed with nine different electrical rotors so that the first non-rotating natural frequencies and corresponding vibration modes in a free-free support condition are obtained experimentally. The models are evaluated by comparing the natural frequencies and corresponding vibration mode shapes obtained experimentally with those obtained numerically. Finally, a critical discussion of the behavior of the beam models studied is presented. The results show that for the majority of the rotors tested, the “branched model” is the most suitablehttp://jestec.taylors.edu.my/Vol%208%20Issue%204%20August%2013/Volume%20(8)%20Issue%20(4)%20457-471.pdfRotordynamicsLaminated coreElectrical machinesNatural frequencies |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
HIDERALDO L. V. SANTOS MARCO A. LUERSEN CARLOS A. BAVASTRI |
spellingShingle |
HIDERALDO L. V. SANTOS MARCO A. LUERSEN CARLOS A. BAVASTRI EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES Journal of Engineering Science and Technology Rotordynamics Laminated core Electrical machines Natural frequencies |
author_facet |
HIDERALDO L. V. SANTOS MARCO A. LUERSEN CARLOS A. BAVASTRI |
author_sort |
HIDERALDO L. V. SANTOS |
title |
EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES |
title_short |
EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES |
title_full |
EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES |
title_fullStr |
EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES |
title_full_unstemmed |
EXPERIMENTAL EVALUATION OF NUMERICAL MODELS TO REPRESENT THE STIFFNESS OF LAMINATED ROTOR CORES IN ELECTRICAL MACHINES |
title_sort |
experimental evaluation of numerical models to represent the stiffness of laminated rotor cores in electrical machines |
publisher |
Taylor's University |
series |
Journal of Engineering Science and Technology |
issn |
1823-4690 |
publishDate |
2013-08-01 |
description |
Usually, electrical machines have a metallic cylinder made up of a compacted stack of thin metal plates (referred as laminated core) assembled with an interference fit on the shaft. The laminated structure is required to improve the electrical performance of the machine and, besides adding inertia, also enhances the stiffness of the system. Inadequate characterization of this element may lead to errors when assessing the dynamic behavior of the rotor. The aim of this work was therefore to evaluate three beam models used to represent the laminated core of rotating electrical machines. The following finite element beam models are analyzed: (i) an “equivalent diameter model”, (ii) an “unbranched model” and (iii) a “branched model”. To validate the numerical models, experiments are performed with nine different electrical rotors so that the first non-rotating natural frequencies and corresponding vibration modes in a free-free support condition are obtained experimentally. The models are evaluated by comparing the natural frequencies and corresponding vibration mode shapes obtained experimentally with those obtained numerically. Finally, a critical discussion of the behavior of the beam models studied is presented. The results show that for the majority of the rotors tested, the “branched model” is the most suitable |
topic |
Rotordynamics Laminated core Electrical machines Natural frequencies |
url |
http://jestec.taylors.edu.my/Vol%208%20Issue%204%20August%2013/Volume%20(8)%20Issue%20(4)%20457-471.pdf |
work_keys_str_mv |
AT hideraldolvsantos experimentalevaluationofnumericalmodelstorepresentthestiffnessoflaminatedrotorcoresinelectricalmachines AT marcoaluersen experimentalevaluationofnumericalmodelstorepresentthestiffnessoflaminatedrotorcoresinelectricalmachines AT carlosabavastri experimentalevaluationofnumericalmodelstorepresentthestiffnessoflaminatedrotorcoresinelectricalmachines |
_version_ |
1725462067332251648 |