Electromagnetically excited audible noise – evaluation and optimization of electrical machines by numerical simulation

Schlensok, C.; Schmuelling, Benedikt; Giet, M. van der; Hameyer, Kay

doi:10.1108/03321640710751181

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…JMAG finite element package is an integrated electromagnetic field analysis software, which can be used to calculate the 2D and 3D electromagnetic fields of electrical machines. In this simulation, the model of 2D transient response analysis is used, and the mesh type chooses triangle element consisting of three nodes and three element edges (Schlensok and Henneberger, 2004;Schlensok et al, 2007;Jian et al, 2009). Moreover, the rotor-slot air region's element size is set to 0.2 mm, and the air gap is meshed by using JMAG's cylindrical slide plane, which meets the simulation accuracy with a reasonable computing time.…”

Section: Analysis and Discussionmentioning

confidence: 99%

A new modeling method for S-MCSRM driven by three-phase full bridge converter

Qing

et al. 2013

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -The S-MCSRM is a two-phase excited switched reluctance motor (SRM), with the short flux path and mutual inductance coupling, which is suitable for the oil submersible pump application owing to large torque and three-wire connection with the standard full-bridge power converter. However, there is not literature to disclose its model due to the complicated mutual inductance coupling. The FEM model is a time-consuming method to analyze this motor. For the first time, this paper aims to propose an S-MCSRM model for performance analysis and control method developing. The proposed model would save simulation time and be a theoretical fundamental for further implementing control algorithm. Design/methodology/approach -The S-MCSRM's operating principle is analyzed, and the voltage equation and the generated torque are deduced. The FEM is utilized to obtain the five typical magnetization curves that describe the S-MCSRM's magnetic path characteristic. The magnetic co-energy equation, phase torque and total torque equations are obtained. From the basic voltage equation, the S-MCSRM's state space model is built for the dynamic analysis and control purpose. The S-MCSRM is widely analyzed in detail by using the proposed model and comparison with the conventional SRM. JMAG finite element package is used to verify the proposed model. Findings -The proposed modeling method is validated by the identical results to those from FEM-based JMAG software. The proposed model just takes second-level time, which is far less than minute-level time consuming of FEM method. The S-MCSRM generates larger torque than the conventional SRM, with three-wire and standard full bridge power converter, and it is confirmed that the S-MCSRM is suitable for the oil submersible pump applications. Originality/value -This paper proposes a new modeling method for the S-MCSRM to exactly analyze the motor's operating performances, and also it is a theoretical fundamental for developing control algorithm. The proposed model saves much time in analysis, calculation, and simulation, when compared to the FEM method. The completed analysis including flux linkages, torque, torque-ripple, and torque-speed characteristic discloses the S-MCSRM's steady-state operating performances, which provides the deep insight for this kind of motor's applications.

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Section: Analysis and Discussionmentioning

confidence: 99%

A new modeling method for S-MCSRM driven by three-phase full bridge converter

Qing

et al. 2013

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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“…As for the acoustic behaviours of electric machines, some works have outlined the interesting potential of applying simulated electromagnetic excitations on structural finite-element models in order to compute representative noise levels radiated while functioning. In addition to the modelling guidelines proposed by Millithaler et al [17,18,19], Schlensok et al [20], Humbert et al [21] and Dupont et al [22] present multi-physical simulation methods including electromagnetic, structural and acoustic simulations for predicting the overall motor or powertrain noise emissions. Concerning design objectives though, to the authors' knowledge there are currently no published works detailing the optimisation of potting resins' viscoelastic properties for minimising electric motors' acoustic responses involving electromagnetic excitations.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic property tuning for reducing noise radiated by switched-reluctance machines

Millithaler

Dupont²,

Ouisse

et al. 2017

Journal of Sound and Vibration

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Switched-reluctance motors (SRM) present major acoustic drawbacks that hinder their use for electric vehicles in spite of widely-acknowledged robustness and low manufacturing costs. Unlike other types of electric machines, a SRM stator is completely encapsulated/potted with a viscoelastic resin. By taking advantage of the high damping capacity that a viscoelastic material has in certain temperature and frequency ranges, this article proposes a tuning methodology for reducing the noise emitted by a SRM in operation. After introducing the aspects the tuning process will focus on, the article details a concrete application consisting in computing representative electromagnetic excitations and then the structural response of the stator including equivalent radiated power levels. An optimised viscoelastic material is determined, with which the peak radiated levels are reduced up to 10 dB in comparison to the initial state. This methodology is implementable for concrete industrial applications as it only relies on common commercial finite-element solvers.

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“…A common means to perform these simulations is the finite element method (FEM), i.e. the boundary element method (BEM) for acoustic simulations (Schlensok et al , 2006, 2007; Xu and Huang, 2010).…”

Section: Introductionmentioning

confidence: 99%

Computation of the noise radiation of an induction machine using 3D FEM/BEM

Weilharter¹,

Bíró²,

Lang³

et al. 2011

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -The purpose of this paper is to set up a comprehensive numerical approach to estimate the 3D structural vibration and noise radiation of an induction machine. Design/methodology/approach -The rotating force waves, acting in the air gap of an induction machine and obtained by an electromagnetic finite element multi-slice simulation, are applied to the 3D structural finite element model and a structural harmonic simulation is performed. The sound emission due to the vibration of the surface of the machine is computed with a 3D boundary element model. Findings -The paper outlays problematic issues when setting up the numerical models, i.e. the structural finite element model. The material properties strongly affect the structural behaviour and therefore the radiated noise. Originality/value -The 3D force distribution in the air gap and the resulting vibrations are computed. The structural behaviour, i.e. the different vibrational behaviour of stator and surface is discussed. The correlation of the structural vibrations and the noise radiation is investigated.

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Electromagnetically excited audible noise – evaluation and optimization of electrical machines by numerical simulation

Cited by 15 publications

References 24 publications

A new modeling method for S-MCSRM driven by three-phase full bridge converter

A new modeling method for S-MCSRM driven by three-phase full bridge converter

Viscoelastic property tuning for reducing noise radiated by switched-reluctance machines

Computation of the noise radiation of an induction machine using 3D FEM/BEM

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