Analytical model for predicting noise and vibration in permanent magnet synchronous motors

Islam, Rakib; Husain, Iqbal

doi:10.1109/ecce.2009.5316074

Cited by 58 publications

(73 citation statements)

References 15 publications

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“…Since the machine is about 820 W, the maximum radial displacement owing to magnetic vibration is set to the reasonable value of 10 μm [8]. It indicates that the maximum noise appears at the place of machine surface.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the radial displacement of this machine is less than the PM machine owing to the strong attracting capability of PMs. The maximum radial displacement caused by the magnetic vibration is set to a reasonable value of 10 μm, because the proposed machine volume is not large and is with outside diameter of 280 mm only [8]. Actually, in most cases, the radial displacement of the machine cannot reach this value.…”

Section: A Machine Operation Principlementioning

confidence: 99%

“…where F rad is the radial force, L a is the axial length, l p is the circumferential line for pressure calculation, σ and a are the coefficients, ρ is the material density, c is the traveling speed of sound in the medium, f exc is the winding excitation frequency, x is the radial displacement caused by magnetic vibration (usually below 10 μm for kilowatt machine [8]), and R o is the outer radius of machine. As derived in (3), it can be found that produced pressure is affected by the radial force and the machine volume.…”

Section: B Magnetic Vibration Analysismentioning

confidence: 99%

“…The corresponding mechanical noise greatly depends on the machine installation and other mechanical factors. The corresponding magnetic noise comes from the radial magnetic attraction between the stator and rotor poles, which is independent of the torque ripple and cogging torque [7], [8]. This attractive force dominates the vibration and hence the machine magnetic noise.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetic Vibration Analysis of a New DC-Excited Multitoothed Switched Reluctance Machine

et al. 2014

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This paper proposes a combined numerical and analytical approach for magnetic vibration analysis of a new dc-excited multitoothed switched reluctance (MSR) machine. First, the machine design is artfully to incorporate the dc-excited winding into the MSR topology, hence breeding a new flux controllable, high-torque, low-torque ripple, and doubly salient magnetless machine. Then, the finiteelement-method is used to calculate the machine force and torque. A series of analytical equations are formulated to calculate the magnetic vibration parameters of the proposed machine. The analysis process and the corresponding results are given to verify the validity of the proposed approach for magnetic vibration analysis of the new machine.Index Terms-Doubly salient machine, flux control, magnetic vibration, magnetless, noise analysis, switched reluctance machine.

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Section: Resultsmentioning

confidence: 99%

Section: A Machine Operation Principlementioning

confidence: 99%

Section: B Magnetic Vibration Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic Vibration Analysis of a New DC-Excited Multitoothed Switched Reluctance Machine

et al. 2014

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“…In the state of art of modeling, it is undoubtedly the most precise method for computing air-gap permeance. The literature proposes several analytical models [6], [14]. Our method provides better results if the wedge permeability, the rotor shape, and the asymmetry of the stator teeth are considered.…”

Section: A Complex Air-gap Permeancementioning

confidence: 99%

Design and Magnetic Noise Reduction of the Surface Permanent Magnet Synchronous Machine Using Complex Air-Gap Permeance

et al. 2015

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Nowadays, developing electric motorization for land vehicles is essential owing to the crucial need to save energy. This paper presents the development of a tool used in optimal acoustic and electromechanical modeling whose highly accurate calculations and speed of resolution make it stand out from standard analytical and finite element (FE) models. By coupling an analytical model with static FE simulations, our hybrid model calculates a complex global air-gap permeance per area unit, to take into account magnetic wedge permeability, preslot height, and rotor shape. An unparalleled level of precision and speed of resolution is obtained for the computation of air-gap magnetic pressures. Several results of comparisons between acoustic measurements and simulations on a concentrated winding motor for different speeds are presented.Index Terms-Air-gap permeance, distributed and concentrated windings, magnetic noise, Maxwell pressures, permanent magnets (PMs), pulse-width modulation (PWM), vibrations. 0018-9464

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Influence of Pole and Slot Combination on Torque Characteristics and Radial Force of Fractional Slot Permanent Magnet Machines

Zhang

Guo

2021

IEEJ Transactions Elec Engng

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The fractional slot concentrated winding structure effectively solves the difficulty of low-speed and high-torque permanent magnet (PM) machines with a large number of poles and slots, but it also brings a wealth of magnetomotive force (MMF) harmonic. The winding function method is used to compare and analyze the stator MMF distribution and harmonic content of the fractional slot PM machines with different pole and slot combinations, and the cogging torque waveform and torque ripple are calculated by the finite element method. The influence of pole and slot combination on radial force and vibration modes of fractional slot PM machines is studied. The main vibration mode can be determined from the lowest order of radial force harmonics. The results show that in a fractional slot PM motor, the radial force is the main cause of noise and vibration, rather than the cogging torque and torque ripple. The dominant radial force is mainly produced by the interaction of rotor field harmonics and armature reaction field harmonics, and the vibration and noise will significantly increase with the decrease of the dominant vibration mode order, which largely depends on the pole and slot combination. This paper provides a certain reference for the selection of pole and slot combination in the electromagnetic design process of low speed high torque fractional slot PM motors.

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Analytical model for predicting noise and vibration in permanent magnet synchronous motors

Cited by 58 publications

References 15 publications

Magnetic Vibration Analysis of a New DC-Excited Multitoothed Switched Reluctance Machine

Magnetic Vibration Analysis of a New DC-Excited Multitoothed Switched Reluctance Machine

Design and Magnetic Noise Reduction of the Surface Permanent Magnet Synchronous Machine Using Complex Air-Gap Permeance

Influence of Pole and Slot Combination on Torque Characteristics and Radial Force of Fractional Slot Permanent Magnet Machines

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