Analytical determination of the orthotropic material behavior of stator bars in the range of the end windings and determination of the material characteristics of the orthotropic composite space brackets via experimental modal analysis and FE- calculation

Schlegl, Bernd; Schönleitner, Florian; Marn, Andreas; Neumayer, Fritz; Heitmeir, Franz

doi:10.1109/icelmach.2012.6350148

Cited by 9 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, the equivalent material property settings for model 2 are explained. Each components for the matrix displayed in the following formula should be specified when anisotropy is set according to paper [17]. The calculation results of model 1 and model 2 are shown in table 4.…”

Section: Modeling and Modal Analysis A Equivalent Model Of Statmentioning

confidence: 99%

“…The effective part of the winding and the end winding cannot simply calculate the natural frequency in the form of additional mass; the end winding quality and The effect of stiffness on the natural frequency generally cancels each other out, so the effect of the end winding on the natural frequency is relatively small. Paper [17] shows the development of a material model of the complete stator bar. Special attention was paid to the experimental determination of the material characteristics of the orthotropic composite space brackets.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding

Yin

Zhang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

An accurate prediction of modal characteristics of motor stator is essential in order to design a low vibration motor and to operate it quietly. Scholars have done a lot of research on the modal analysis of stator core and winding. However, there are few papers for the 0th-order mode shape and frequency of the stator system. This paper aims to propose a new stator system analysis model, which can effectively analyze the 0th-order mode and improve the model calculation efficiency. Firstly, the modal of stator core and stator core-winding system were analyzed theoretically. Secondly, four stator system finite element analysis models were established. The modal analysis of the stator core and stator core-winding system were carried out using the four models. The validity and computational efficiency of the four models of the stator core and stator core-winding system were compared. A new stator system analysis model was proposed. Thirdly, the modal tests of the stator core and stator core-winding system were carried out by hammering method, and the validity of the finite element analysis model was verified. Compared with the traditional model, the newly proposed model can analyze the 0th-order mode more effectively and improve the computational efficiency.

show abstract

Section: Modeling and Modal Analysis A Equivalent Model Of Statmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding

Yin

Zhang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…xs and I ys are the moment of inertia of the stator bar cross-sectional area, E i is the Young's modulus of the components, and I xi and I yi are the moment of inertia of the components cross-sectional area. Furthermore, when the anisotropic elastic moduli of the bar are taken into account in the bar model, other elastic moduli can be evaluated by a classical rule-of-mixture of composite materials [15,18] expressed as…”

Section: Calculation Of Stator Bar Equivalent Modulimentioning

confidence: 99%

“…Moreover, in FE models, stator bars comprising several materials are simplified. The whole stator bar is generally homogenised and modelled as a single material with an equivalent elastic modulus [4,6,7,14,15]. Since these models cannot reproduce the spatial distribution of the rigidity in a cross-section of the stator bar, they may degrade calculation accuracy.…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of turbine generator stator end windings for vibration analysis

Iga

Takahashi

Yamamoto

2016

IET Electric Power Applications

View full text Add to dashboard Cite

In this study, the authors present methods for accurately modelling the bindings and the stator bars of turbine generator stator end windings for vibration analyses. The bindings are modelled with beam elements and multipoint constraint equations to take account of the bending, twisting, and shearing rigidities of the bindings. To reproduce the spatial distribution of rigidity in a cross-section of the stator bar, the bar is modelled as a composite material comprising a conductor bar with equivalent elastic moduli and ground insulation. The accuracies of the developed binding and stator bar models are verified by comparing measured natural frequencies of binding test pieces and stator bar specimens with calculated values. The developed models and conventional models are applied to the natural frequency analyses of stator end windings, and then the effects of the modelling methods on the calculation accuracy are investigated. While the maximum calculation errors of the conventional models are more than 12%, the calculation results of the developed models agree with the measured values within an error of 7%. Accordingly, for accurately calculating the end winding natural frequencies, end winding finite element models need to take the binding rigidities into account and reproduce the rigidity distribution of the stator bar.

show abstract

“…The error of the FE modal result was significant, since the stator core and the windings were anisotropic materials. Schlegl et al [15] established a material to predict the natural frequency of a stator end winding and found that it was difficult to obtain the physical parameters of the laminated core and windings, such as Young's modulus. Hu et al [16] proposed a novel method for the acquisition of the equivalent material parameters considering the orthotropy of the stator core and the windings in an SRM.…”

Section: Introductionmentioning

confidence: 99%

Parameter Equivalent Method of Stator Anisotropic Material Based on Modal Analysis

Zhang

Xia

et al. 2019

Energies

View full text Add to dashboard Cite

Accurate calculation of the vibration mode and natural frequency of a motor stator is the basis for reducing motor noise and vibration. However, the stator core and winding material parameters are difficult to determine, posing issues which result in modal calculation bias. To address the problem of calibrating the stator material parameters, we developed a parameter correction method based on modal frequency. First, the stator system was simplified to build a stator system finite element model. Secondly, the relationship between modal frequency and material parameters was analyzed by finite element software, the relationship between modal frequency and material parameters was derived, and the anisotropic material parameter correction method was summarized. Finally, a modal experiment was carried out by the hammering method, and the simulation and experimental errors were within 3%, which verified the accuracy of the finite element model. The proposed correction method of anisotropic material can quickly determine the stator material parameters, and the stator core and winding anisotropic material can ensure the accuracy of the modal analysis.

show abstract

Analytical determination of the orthotropic material behavior of stator bars in the range of the end windings and determination of the material characteristics of the orthotropic composite space brackets via experimental modal analysis and FE- calculation

Cited by 9 publications

References 6 publications

New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding

New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding

Finite element modelling of turbine generator stator end windings for vibration analysis

Parameter Equivalent Method of Stator Anisotropic Material Based on Modal Analysis

Contact Info

Product

Resources

About