A Magnetic and Mechanical Force Model for the Design of an Archimedean Spiral Flexure Bearing for a Linear Direct-Drive Electromagnetic Actuator

Loussert, Guillaume; Alzingre, Jean-Daniel

doi:10.1109/tmech.2019.2918056

Cited by 10 publications

(6 citation statements)

References 15 publications

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“…The Lorentz force determined by Equation ( 1) can be quickly predicted from the magnetic flux obtained by a MEC [24][25][26]. Therefore, for a magnetostatic analysis, a simple MEC analysis was conducted to elucidate the electromagnetic phenomenon and analyze the approximate Lorentz force of the proposed IMLA.…”

Section: Lorentz Force Prediction Of the Proposed Imla By A Magnetic ...mentioning

confidence: 99%

“…The amplitude and frequency of external vibration detected by a real time sensor are transmitted to the controller and, based on this, the controller adjusts the frequency and current amplitude of the amplifier. Electromagnetic actuators based on the Lorentz force can be divided into moving voice coil actuators (VCMs) [19][20][21] and moving inertial mass actuators (IMAs) [22][23][24]. Structurally, the IMAs and VCAs are similar in appearance, as shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the coil part of the IMA as shown in Figure 2b is fixed, and the solid core and PM are used as the moving part to generate inertial mass force. An IMA typically consists of a mass that is mechanically connected to a load and can be accelerated or decelerated to Electromagnetic actuators based on the Lorentz force can be divided into moving voice coil actuators (VCMs) [19][20][21] and moving inertial mass actuators (IMAs) [22][23][24]. Structurally, the IMAs and VCAs are similar in appearance, as shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic Design and Analysis of Inertial Mass Linear Actuator for Active Vibration Isolation System

Hong

Park

2023

Actuators

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Underwater radiated noise from anthropogenic structures must be reduced to protect the marine environment. Active vibration isolation that can reduce noise generated from vibration sources by providing counteracting forces can solve this issue. This paper presents a 120 N class electromagnetic inertial mass linear actuator for an active vibration control system in a large ship. The proposed actuator is operated based on the Lorentz force, also known as electromagnetic force. To achieve a high thrust force to weight ratio, a permanent magnet with outer radial magnetization is used. In order to design and analyze the proposed model, a simple magnetic equivalent circuit analysis was first conducted to achieve an appropriate force, and its value was compared and verified with the magnetostatic finite element method. The dynamic characteristics of the actuator were then evaluated, and the performance was analyzed at various operating frequency points. The bobbin housing supporting the coil causes an eddy current loss due to materials with electrical conductivity. As a result, the damping force is generated by the reduction in magnetic flux, and the control force tends to decrease.

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Section: Lorentz Force Prediction Of the Proposed Imla By A Magnetic ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electromagnetic Design and Analysis of Inertial Mass Linear Actuator for Active Vibration Isolation System

Hong

Park

2023

Actuators

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“…In principle, FEM-based ETCs estimation needs to solve a set of differential equations based on Maxwell's equations. Basically, that is a complex, difficult, and time-consuming procedure [15]. To reduce the computational time of FEM, fully coupled simulation framework [16], re-meshing technique [17], fast algorithm [18] and the equivalent circuit method of the coilcoil type electromagnetic repulsion actuator [19] have been developed successively.…”

Section: Contactor Laser Displacement Sensormentioning

confidence: 99%

Energy Conservation Model for Electromechanical Transient Characteristics of Electromagnetic Actuators

You

Liang

et al. 2022

IEEE Trans. Energy Convers.

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Fault diagnosis and bounce reduction of electromagnetic actuators require one to obtain the electromechanical transient characteristics (ETCs) in real-time. ETCs can be measured by sensors, but due to their large size and intrusiveness, the approach has its limitations. Acquiring ETCs through finite element method (FEM) could be an alternative, except that FEM is known to be time consuming. In contrast, real-time measurement of coil current is not subjected to these restrictions, yet, it has not been properly utilized for calculating ETCs. In this regard, this paper analyzes the source of the armature kinetic energy, and thus proposes a model based on energy conservation (ECM), describing the relationship between the mechanical and electrical characteristics. Based on the model, ETCs can be calculated from coil current, moving part mass, and the static counterforce. To exemplify the effectiveness of the procedure, an electromagnetic contactor is considered, and the results obtained using the ECM are found fairly consistent with that obtained using sensors. The merit of the proposed ECM lies in its nonintrusive nature and its ability to circumvent the time-consuming FEM in calculating ETCs.

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“…To achieve precise control accuracy in magnetic bearings, the accuracy of the mathematical model of the controlled object is inseparable from advanced control methods [8]. The outcomes obtained through the conventional equivalent magnetic circuit method (EMCM), which relies on simplifying the magnetic field, may not always be accurate [9].…”

Section: Introductionmentioning

confidence: 99%

Analytical Model of Six-pole Axial-radial Active Magnetic Bearing Based on Flux Density and Segmentation of Magnetic Field

Zhu,

Wang,

Liu

2024

PIER M

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To reduce the coupling resulting from structural asymmetry and enhance the load-bearing capacity per unit area, a six-pole axial-radial active magnetic bearing (AR-AMB) has been suggested. To refine the precision of the mathematical model derived from the conventional equivalent magnetic circuit model, a modeling technique that employs flux density and magnetic field segmentation has been proposed. Firstly, the structure and operational principle of the six-pole AR-AMB are introduced. Subsequently, an improved model based on the flux density is established by considering the internal relationship between the iron core and air gap magnetic field in a magnetic bearing with pole shoes. The model addresses issues related to the accurate calculation of fringing magnetic flux and magnetic saturation of core materials while accounting for eddy current effects on suspension force. Finally, the accuracy of the theoretical analysis results has been validated through finite element simulation and experiment, and demonstrated that the rotor based on this model exhibits robust anti-interference capabilities.

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A Magnetic and Mechanical Force Model for the Design of an Archimedean Spiral Flexure Bearing for a Linear Direct-Drive Electromagnetic Actuator

Cited by 10 publications

References 15 publications

Electromagnetic Design and Analysis of Inertial Mass Linear Actuator for Active Vibration Isolation System

Electromagnetic Design and Analysis of Inertial Mass Linear Actuator for Active Vibration Isolation System

Energy Conservation Model for Electromechanical Transient Characteristics of Electromagnetic Actuators

Analytical Model of Six-pole Axial-radial Active Magnetic Bearing Based on Flux Density and Segmentation of Magnetic Field

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