Analysis of radial force harmonics in PMSM responsible for electromagnetic noise

Delfa, Patricio La; Hecquet, Michel; Gillon, F.; Besnerais, Jean Le

doi:10.1109/ever.2015.7112945

Cited by 14 publications

(12 citation statements)

References 6 publications

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“…Many experts and scholars carried out extensive research and obtained certain achievements. Lipo T. A. et al [4,5] analyzed the influence of radial electromagnetic force on the electromagnetic noise of a permanent-magnet synchronous motor (PMSM). Zhu Ziqiang, professor of the University of Sheffield, proved that the radial electromagnetic force acting on the stator surface and various order modes of stator structure were two key reasons for the electromagnetic noise of PMSM [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis on noise characteristics of surface-mounted permanent magnet synchronous motors

Shu¹,

Zhong²

2019

J. vibroeng.

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Starting with the analysis on sound pressure level (SPL) spectrum of surface-mounted permanent magnet synchronous motors (SMPMSMs), the reasons for producing main peaks are investigated. According to different causes, different methods for reducing noise are proposed. Firstly, the SPL spectrum of SMPMSMs is obtained by experiment under the conditions of 2000 rpm rated speed, full load and 4 kHz switching frequency. Meanwhile, the frequencies corresponding to main peaks are found out. Secondly, the reasons for generating peaks in the SPL spectrum are researched from three aspects, namely, force sources, natural frequencies, coefficient of relative sound intensity. Then, on the basis of different causes for generating noise, different measures for decreasing noise are presented, namely, single cutting of two end rabbets of motor case in single clamping, waveform reconstruction of radial electromagnetic force density, enhancing of switching frequency, changing of natural frequency and decreasing of the lengthdiameter ratio of stator. Furthermore, the effectiveness for these methods is studied. Finally, a comprehensive method is proposed to decrease noise. The noise value of SMPMSMs is reduced by 4.7 dB(A) at the rated speed of 2000 rpm, full load and switching frequency of 4 kHz. In addition, the sharpness and loudness are respectively decreased by 0.522 acum and 6.97 sone at no load. The study provides references for the design of SMPMSMs with low noise.

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Section: Introductionmentioning

confidence: 99%

Experimental analysis on noise characteristics of surface-mounted permanent magnet synchronous motors

Shu¹,

Zhong²

2019

J. vibroeng.

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“…It is pointed out that the vibration behaviour of this machine is mainly determined by the slot harmonic and the amplitude of the slot harmonic is heavily affected by the load. In [12][13][14], the authors give the general expressions of frequency and corresponding spatial order of magnetic forces in three-phase permanent magnet synchronous motor (PMSM)s. In [15,16], the frequency and corresponding spatial order of magnetic force in external rotor PMSM are investigated. Results show that the magnetic force characteristic in external rotor PMSM is different from those in inner rotor PMSM.…”

Section: Introductionmentioning

confidence: 99%

Characteristics analysis of electromagnetic force and noise of claw pole alternators with different pole and slot combinations and phase number

Zuo

2018

IET Electric Power Applications

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This study analysed the characteristics of electromagnetic force and noise of claw pole alternators with different pole and slot combinations and different phase number. The magnetic flux density in the airgap was first derived based on the magnetomotive force and permeance. Then the electromagnetic force was obtained using Maxwell stress tensor method. According to the analytical model, the spatial order and frequency of electromagnetic force can be expressed as the function of pole-pairs number p, slot number s and phase number m. Afterwards, the electromagnetic noise of three different alternators was tested in a semi-anechoic chamber. Combined with the 2D fast Fourier transform of electromagnetic force, the main force harmonics that caused the electromagnetic noise were distinguished. Finally, the relationship between the frequencies of electromagnetic force and noise and the number of pole-pairs and phase were established. Analysis result shows that for mphase 2p-pole/s-slot integer slot claw pole alternators, the spatial order of electromagnetic force is kp (k = 0, 1, 2, 3,…) and the corresponding frequency of these force harmonic is [±2mpk′ + (±kp)]f r (k′ = 0, 1, 2, 3 …). The main order (frequency domain) of electromagnetic noise is 2mp which is independent of the slot number.

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“…This type of machines has a salient rotor in comparison with smooth rotor SMPM machines. The structure of rotor, the number of stator slots, and the number of rotor poles can produce the non-intrinsic UMF [1]- [9]. The intrinsic UMF are generated by the static/dynamic rotor eccentricities or uneven distribution of material properties [9]- [11].…”

Section: Introductionmentioning

confidence: 99%

“…The structure of rotor, the number of stator slots, and the number of rotor poles can produce the non-intrinsic UMF [1]- [9]. The intrinsic UMF are generated by the static/dynamic rotor eccentricities or uneven distribution of material properties [9]- [11]. Many authors have analyzed analytically the magnetic field, the electromagnetic performances and UMF in SMPM machines [2]- [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical prediction of electromagnetic performances and unbalanced magnetic forces in fractional-slot spoke-type permanent-magnet machines

Boughrara

Ibtiouen

Dubas

2016

2016 XXII International Conference on Electrical Machines (ICEM)

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This paper presents an analytical method for the computation of electromagnetic performances and non-intrinsic unbalanced magnetic forces (UMF) in fractional-slot spoke-type permanent-magnet (STPM) machines. It is based on the twodimensional (2-D) subdomain method in polar coordinates considering the drive current: i) sinusoidal, and ii) six-step rectangular. It involves solution of Laplace's and Poisson's equations in the stator slots, the air-gap, the buried tangential PMs into rotor slots, and the non-magnetic region under PMs. The results obtained with 2-D analytical model (viz., the electromagnetic performances and the non-intrinsic UMF) are verified with those issued from finite-element method (Fem).

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Analysis of radial force harmonics in PMSM responsible for electromagnetic noise

Cited by 14 publications

References 6 publications

Experimental analysis on noise characteristics of surface-mounted permanent magnet synchronous motors

Experimental analysis on noise characteristics of surface-mounted permanent magnet synchronous motors

Characteristics analysis of electromagnetic force and noise of claw pole alternators with different pole and slot combinations and phase number

Analytical prediction of electromagnetic performances and unbalanced magnetic forces in fractional-slot spoke-type permanent-magnet machines

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