Optimum design of an eddy current damper considering the magnetic congregation effect

Pu, Huayan; Li, Jingming; Wang, Min; Huang, Yong; Zhao, Jinglei; Yuan, Shujin; Peng, Yan; Xie, Shaorong; Luo, Jun; Sun, Yu

doi:10.1088/1361-6463/ab5bbb

Cited by 14 publications

(9 citation statements)

References 25 publications

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“…So far, the only work that has addressed the influence of back iron on damping is that proposed by Pu et al [5]. They computed the magnetic field by solving an axisymmetric FE model, in combination with a back iron congregation phenomenon The latter has also been analyzed in the present work.…”

Section: Introductionmentioning

confidence: 98%

“…The described EC system can conveniently be used to design a multitude of other advanced, green, contactless damping or braking devices. Linear and rotary eddy current (EC) dampers are increasingly being used over a wide range of advanced applications with the aim of damping vibrations in vehicles [1][2][3][4][5], controlling vibrations in rotary machines [6], and suppressing and isolating vibrations in levitation systems [7,8], magnetic brakes [9,10], spaces [11] and civil applications [12,13]. The main advantage of an EC damper, over a conventional hydraulic damper, stems from its enhanced dynamics, reliability and the absence of polluting oil.…”

Section: Introductionmentioning

confidence: 99%

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Integral Methodology for the Multiphysics Design of an Automotive Eddy Current Damper

Jamolov

Maizza

2022

Energies

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The present work reports an integrated (experimental and numerical) methodology that combines the development of a finite element multiphysics model with an experimental strategy to optimally design an eddy current damper for automotive suspensions. The multiphysics model couples the whole set of time-dependent electromagnetic, thermal, mechanical, and fluid–wall interaction (CFD) partial differential equations. The developed FE model was validated against both literature model predictions and in-house experimental data. The electromagnetic model takes into account the magnetic material characteristics of the ferromagnetic material and iron poles. Loss separation and the Jiles–Atherton hysteresis models were invoked to determine the heat generated in the soft iron parts. The computation of the fluid–wall interaction phenomena in the air gap allowed for the prediction of the temperature field across the solid materials, including the magnets. The design of the EC damper addresses the effects of the geometries of the stator and rotor, as they are the most critical geometries for maximizing the functions of an eddy current damper. The magneto-thermal simulations suggested that the heating of the permanent magnets remains within a safe region over the investigated operational frequency range of the eddy current damper.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Integral Methodology for the Multiphysics Design of an Automotive Eddy Current Damper

Jamolov

Maizza

2022

Energies

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“…It is another velocity-dependent passive damper that can generate damping force when relative movements appear between the conductive sheet and permanent magnets (Ebrahimi et al, 2009). In this manner, the kinetic energy can be transformed into electrical energy and dissipated as heat (Abdo et al, 2019; Pu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization of the Eddy current dampers applied to a suspension bridge considering bi-directional earthquakes

Meng

Yang

et al. 2023

Journal of Vibration and Control

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The Eddy Current Damper (ECD) is a velocity-based passive energy dissipation device that can be used for structural vibration control. This study aims to reveal the damper behavior and determine the optimal parameters of the ECDs applied to a suspension bridge suffering from bi-directional earthquakes. The influence of the bi-directional vibration interaction on the damping force is theoretically investigated. An optimization method is proposed combining the Sobol Sequence sampling method, the Coefficient of Variation (COV) method, and the Backpropagation neural network (BPNN) algorithm. A numerical model of a long-span suspension bridge with bi-directional ECDs is established and taken as a case study to verify the feasibility of the proposed optimization method. The results indicate that the ECD system with bi-directional interaction will produce a larger maximum force and less energy dissipation than one without bi-directional interaction. The proposed optimization method possesses the characteristics of objectivity, accuracy, and effectiveness. The obtained optimal bi-directional ECDs can significantly reduce the longitudinal and transverse vibration. Failing to consider bi-directional effects will lead to an overestimation of longitudinal damper parameters and an underestimation to transverse ones, as well as ignoring the influence of damper length on its mechanical performance.

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“…Pu et al [23] investigated the effect of back iron on the damping performance of a passive eddy current (EC) damper and claimed an improvement of more than 200% in the damping coefficient.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Design of an Automotive Regenerative Eddy Current Damper

Jamolov

Peccini²,

Maizza

2022

Energies

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This research presents a finite element multi-physics design methodology that can be used to develop and optimise the inherent functions and geometry of an innovative regenerative eddy current (REC) damper for the suspension of B class vehicles. This methodology was inspired by a previous work which has been applied successfully for the development of an eddy current (EC) damper used for the same type of applications. It is based on a multifield finite element coupled model that can be used to fulfil the electromagnetic, thermal, and fluid dynamic field properties and boundary conditions of a REC damper, as well as its non-linear material properties and boundary conditions, while also analysing its damping performance. The proposed REC damper features a variable fail-safe damping force, while electric power is advantageously regenerated at high suspension frequencies. Its damping performance has been benchmarked against that of a regular hydraulic shock absorber (selected as a reference) by analysing the dynamic behaviour of both systems using a quarter car suspension model. The results are expressed in terms of damping force, harvested power, thermal field, comfort and handling, with reference to ISO-class roads. The optimisation analysis of the REC damper has suggested useful guidelines for the harmonisation of damping and regenerative power performances during service operation at different piston speeds.

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Optimum design of an eddy current damper considering the magnetic congregation effect

Cited by 14 publications

References 25 publications

Integral Methodology for the Multiphysics Design of an Automotive Eddy Current Damper

Integral Methodology for the Multiphysics Design of an Automotive Eddy Current Damper

Parametric optimization of the Eddy current dampers applied to a suspension bridge considering bi-directional earthquakes

Multiphysics Design of an Automotive Regenerative Eddy Current Damper

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