Noise of Polyphase Electric Motors

Gieras, Jacek F.; Wang, Chong; Lai, Joseph Cho

doi:10.1201/9781420027730

Cited by 286 publications

(268 citation statements)

References 1 publication

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“…Electromagnetic noise of motors depends mainly on the radial vibration of motor structures, that is, the circumferential modal shape of motors plays a major role in electromagnetic noise. The larger the size of the motor stator is, the higher the order of modal impacting the electromagnetic noise and vibration of motors would be [11]. Motor studied in this paper was small in size.…”

Section: Calculation Results Of Motor Modal Parametersmentioning

confidence: 98%

Interior noise and vibration prediction of permanent magnet synchronous motor

Qian¹,

Wang²,

Gao³

et al. 2018

J. vibroeng.

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Abstract. Electric vehicles (EV) are considerably quieter than internal combustion engine (ICE) powered vehicles, because noise of ICE is eliminated. However, the interior noise of an EV usually contains significant high-frequency noise components caused by electrical motor, which can be subjectively perceived as annoying and unpleasant. This paper describes a numerical model to predict interior acoustic noise caused by electromagnetic forces in permanent magnet synchronous motor (PMSM) for electric vehicles. Firstly, the principle of the multiphysics method is to establish a complete 3Dstructural finite element model (FEM) of motor. Based on FEM, natural frequency and modal shape were calculated by modal analysis. Secondly, using an electromagnetic finite element solver, the excitation due to electromagnetic phenomena is obtained. This excitation is then projected onto the structure mesh of motor in order to calculate the dynamic response. Thirdly, radiated electromagnetic vibration acceleration on the surface of the motor is calculated with modal superposition method. Compared with experimental test results, the creditability of motor electromagnetic vibration simulation is proved. Finally, by combining with transfer path analysis (TPA) techniques, interior electromagnetic noise of electric vehicles is accurately predicted. According to contribution analysis, motor surface zones and transfer paths contributing largely to the interior motor electromagnetic noise are identified. The results play a significant guiding role in both electric vehicle and permanent magnet synchronous motor for noise control and analysis.Keywords: electric vehicle, permanent magnet synchronous motor (PMSM), finite element analysis (FEA), transfer path analysis, noise and vibration.

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Section: Calculation Results Of Motor Modal Parametersmentioning

confidence: 98%

Interior noise and vibration prediction of permanent magnet synchronous motor

Qian¹,

Wang²,

Gao³

et al. 2018

J. vibroeng.

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“…Maxwell radial pressure causes stator deflection at the origin of acoustic noise radiated by the stator. This is due to rotor and stator slot numbers, eccentricity and saturation effect, magnetomotive force harmonics and the PWM supply [4,5].…”

Section: Introductionmentioning

confidence: 98%

Skew effect on the radial pressure of induction motor

Despret

Hecquet

Lanfranchi

et al. 2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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Acoustics comfort is an increasingly important factor at the design stage of electrical machines associated with converters. Skewing has a direct impact on pressure in the air-gap, which can be responsible for electromagnetic noise. This paper aims to compare different models to study the skewing. The impact of pressures is evaluated and analyzed for no-skew and skew rotors. Three numerical electromagnetic models are compared: 2D finite element method (FEM), 2D FEM multi-slice and 3D FEM. In addition, an experimental measurement validates our results.Ke y words-Maxwell forces; air-gap radial pressure; spatial order and frequenc y ; finite element anal y sis; anal y tical anal y sis; skew rotor;

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“…The vibration in the permanent magnet synchronous motor (PMSM) has been a significant topic for the last couple of decades [7][8][9]. Usually for small and medium-sized PMSMs, electromagnetic vibration is the major cause of the overall vibration, which results from the radial magnetic forces acting on the inner surface of stator [10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Vibrations in Interior Permanent Magnet Synchronous Motors Considering Air-Gap Deformation

Chai

Song

et al. 2017

Energies

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This paper studies the non-uniform air-gap caused by stator and rotor deformations, together with its effects on the spatial and temporal spectrum of the radial magnetic force density in an interior permanent magnet synchronous motor (IPMSM). According to the mathematical model of the deformed air-gap length, the superposition method is adopted to derive the air-gap permeance. Then, the formulas of the magnetic flux field and radial force density of the IPMSM considering air-gap deformation are obtained. Considering the stator oval deformation and the rotor centrifugal distortion in the electromagnetic finite element models (FEMs), the finite element analysis (FEA) and experiments of the investigated IPMSM are carried out to verify the results obtained by the theoretical analysis at different operations. Finally, the mathematical correlation between air-gap deformation and electromagnetic vibration is obtained. The result is helpful in solving problems of mutual influence between electromagnetic and mechanical characteristics during the optimization design of IPMSM.

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Noise of Polyphase Electric Motors

Cited by 286 publications

References 1 publication

Interior noise and vibration prediction of permanent magnet synchronous motor

Interior noise and vibration prediction of permanent magnet synchronous motor

Skew effect on the radial pressure of induction motor

Analysis of Vibrations in Interior Permanent Magnet Synchronous Motors Considering Air-Gap Deformation

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