Identification of laminated core and winding's physical parameters by stator's modal testings

Sun, Jiahao; Feng, Huanqing; Zhu, Changsheng

doi:10.1109/icems.2014.7013726

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…Taking a 2.2kW concentrated winding permanent magnet brushless DC motor for electric vehicle as an example, the modal of the stator core-winding system is calculated according to equation (5) and equation (6). The basic dimensions of the permanent magnet brushless DC motor are shown in Table 1, lamination coefficient k i = 0.96, Young's modulus E c = 185000MPa, mass density of stator core ρ c = 7495kg/m3, mass density of winding ρ cw = 8960kg/m3.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…11 is the natural frequency of each mode of the stator core. In the experimental test results, the modal order of the stator core includes (2, 0), (2, 1), (3, 0), (3, 1), (4, 0), (4,1) and (5,0). The same order can be obtained by model analysis.…”

Section: Experiments a Modal Test And Analysis Of Stator Corementioning

confidence: 99%

“…As motor design is key to the development of electric vehicles (EVs) and hybrid EVs (HEVs), it has recently become the subject of considerable interest [1]- [3]. An accurate prediction of modal characteristics of motor stator is essential in order to design a low vibration motor and to operate it quietly [4], [5]. The modal analysis of the stator core and winding is a difficult point in motor modal analysis.…”

Section: Introductionmentioning

confidence: 99%

“…process of stator core. In paper [5], a method to identify the physical parameters of laminated core and windings is proposed based on the modal testing of the motor stators with different conditions. Comparing the results of 3-D finite element analysis and experimental measurements, the equivalent Young's modulus of the isotropy laminated stator core and the windings are obtained.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

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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.

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Section: Theoretical Analysismentioning

confidence: 99%

Section: Experiments a Modal Test And Analysis Of Stator Corementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

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show abstract

“…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. In [17], a method to identify the physical parameters of the laminated core and windings was proposed based on the modal testing of the motor stators with different conditions. It was shown that the stator windings have a significant effect on modal frequencies of a motor stator and cannot simply be treated as an additional mass.…”

Section: Introductionmentioning

confidence: 99%

Parameter Equivalent Method of Stator Anisotropic Material Based on Modal Analysis

Zhang

Xia

et al. 2019

Energies

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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.

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Accurate modelling and modal analysis of stator system in permanent magnet synchronous motor with concentrated winding for vibration prediction

Chai

Pei

et al. 2018

IET Electric Power Applications

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This study investigates the accurate modelling and the modal natural frequencies of the stator system of a permanent magnet synchronous motor with concentrated winding used in the in-wheel motor system of the electric vehicle. The equivalent material physical properties of each component in the stator system are determined by the correction formula and the empirical coefficient. Meanwhile, the contact conditions between each component are also analysed. According to the structural analysis of stator system, different equivalent finite-element models of winding and frame, together with their effects on the accuracy of simulation results, have been built and investigated, respectively. In addition, the prototype of the motor is fabricated; then the experimental modal analysis of the stator system and its subassemblies are carried out during the manufacturing process. Through comparisons of the results between experiments and finite element anaysis (FEA), the final model of the stator system is determined and verified to be of high accuracy to predict the vibration behaviours of the investigated motor with concentrated winding. Finally, several factors influencing the modal frequencies of stator system are analysed, which could provide certain reference value to the structural design of stator system.

show abstract

Identification of laminated core and winding's physical parameters by stator's modal testings

Cited by 6 publications

References 10 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

Parameter Equivalent Method of Stator Anisotropic Material Based on Modal Analysis

Accurate modelling and modal analysis of stator system in permanent magnet synchronous motor with concentrated winding for vibration prediction

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