A Practical Solution to Mitigate Vibrations in Industrial PM Motors Having Concentric Windings

Cassat, A.; Espanet, Christophe; Coleman, Robert P.; Burdet, L.; Leleu, Emmanuel; Torregrossa, Dimitri; M'Boua, J.; Miraoui, Abdellatif

doi:10.1109/tia.2012.2210172

Cited by 67 publications

(18 citation statements)

References 17 publications

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“…2b. Similarly, based on (9), it can also be solved that P r (4th, 4400 Hz) comes from the interaction of n 1 th and n 2 th permanent magnet field (where n 1 ± n 2 = 22) and the seventh permeance harmonic.…”

Section: Calculation and Analysis Of Electromagnetic Vibration And Nomentioning

confidence: 99%

“…In [4,5], 1D fast Fourier transform (FFT) is adopted to perform harmonic analysis for the time history of radial force at a certain spatial point or for the spatial distribution of radial force at a certain temporal point. The 1D analysis of radial force is widely used and can also be found in [6][7][8][9]. However, the frequency components of radial force with specifically spatial order cannot be obtained by using 1D analysis.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic vibration and noise analysis of permanent magnet synchronous motor with different slot‐pole combinations

Lin

Zuo

2016

IET Electric Power Applications

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This study first employs Maxwell stress tensor method to derive the spatial and temporal distribution characteristics of radial force which induces the electromagnetic vibration and noise. 2D fast Fourier transform is adopted to obtain the frequency components of radial force with specifically spatial harmonic order and force harmonics in six motors with different slot-pole combinations are compared. Then, a multiphysics model for electromagnetic vibration and noise prediction considering the non-uniformly distributed force on the teeth surface is established. Mode superposition method and boundary element method are, respectively, used to calculate the stator vibration and noise. The vibration and noise level in motors with different slot-pole combinations are compared and the corresponding field harmonic sources of noise peaks are located based on 2D decomposing of radial force. Finally, the noise level under different rotational speed and current is discussed. It is mainly concluded that the lowest spatial order force dominates the vibration and noise performance. The noise level under different rotational speed and current depends on the amplitude and frequency of the lowest order force which is the closest to the frequency of the stator mode with the same spatial order.

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Section: Calculation and Analysis Of Electromagnetic Vibration And Nomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromagnetic vibration and noise analysis of permanent magnet synchronous motor with different slot‐pole combinations

Lin

Zuo

2016

IET Electric Power Applications

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“…Although they conclude that skewing the stator slots and skewing the rotor magnets has the same effect and skewing one cogging torque period can eliminate the cogging torque, this method does not provide practical field distribution for a skewed machine. Slot skewing that can improve the back electromotive force (back-EMF) and suppress mutual torque ripple with insignificant motor structure change has been widely used in the electrical machine production [13][14] . For slot skewing, air-gap flux distribution varies along the entire length of the machine in the axial direction, which introduces a number of problems in the field calculation and performance analysis of machines with skewed slots [15] .…”

Section: Introductionmentioning

confidence: 99%

The characteristics analysis and cogging torque optimization of a surface-interior permanent magnet synchronous motor

Zhao

Zhang

et al. 2018

Chin. J. Electr. Eng.

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This paper proposes optimal stator skewed slot analytical method for cogging torque reduction in surface-interior permanent magnet synchronous motor(SIPMSM) and analyzes the characteristics of SIPMSM. The series-parallel equivalent magnetic circuit models(EMCMs) of SIPMSM is built based on the characteristics of magnetic circuits, which is used to design the basic electromagnetic parameters of SIPMSM. Analytical expressions of cogging torque are derived from applying analytical techniques. Stator skewed slot for cogging torque minimum is adopted, and the stator skewed slot pitch is confirmed based on the analytical expressions of the resultant cogging torque. The cogging torque, torque ripple, back electromotive force(back-EMF), power-angle characteristics, efficiency and power factor of SIPMSM are analyzed by establishing 3-dimensional finite element model(3-D-FED) of SIPMSM with stator skewed slot and straight slot. It is shown that the comprehensive performance of optimized SIPMSM is improved as confirmed by finite element analysis and analytical calculation results.

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“…Since mechanical vibration is harmful to the robustness of an integration system and generates audible noise, which is a critical factor in human sensitivity, vibration reduction has become an important issue in motor design [1]- [3]. Many studies have noted that the main sources of motor vibration are fluctuation of the magnetic force and mechanical deformation of the motor structure [4]- [5].…”

Section: Introductionmentioning

confidence: 99%

Vibration reduction Design of Permanent Magnet Motor Using Level Set Based Shape Optimization Method

Lim

Min

Hong

2015

WEVJ

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This paper presents a new optimization method to design a rotor structure for a permanent magnet motor that can reduce vibration. The optimization problem is formulated with a multi-objective function to minimize the fluctuation of the radial magnetic force and the torque ripple. To obtain the optimal rotor shape consisting of a permanent magnet and ferromagnetic material, a multiple level set model is employed to express the structural boundaries and magnetic properties of each material. The updating process of the level set function based on the adjoint sensitivity and the time evolutional equation makes it possible to obtain a novel rotor configuration of the motor. To verify the usefulness of the proposed method, a rotor design example of the surface-mounted permanent magnet motor for electric power steering system is performed.

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A Practical Solution to Mitigate Vibrations in Industrial PM Motors Having Concentric Windings

Cited by 67 publications

References 17 publications

Electromagnetic vibration and noise analysis of permanent magnet synchronous motor with different slot‐pole combinations

Electromagnetic vibration and noise analysis of permanent magnet synchronous motor with different slot‐pole combinations

The characteristics analysis and cogging torque optimization of a surface-interior permanent magnet synchronous motor

Vibration reduction Design of Permanent Magnet Motor Using Level Set Based Shape Optimization Method

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