Design study on a magnetic gravity compensator with unequal magnet arrays

Janssen, Jlg Jeroen; Paulides, Jjh Johannes; Lomonova, E. A.; Delinchant, Benoît; Yonnet, Jean Paul

doi:10.1016/j.mechatronics.2012.08.003

Cited by 27 publications

(12 citation statements)

References 19 publications

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“…; (19) where x i , y i and z i represent the displacement readings from the accordingly named sensors, and L x ¼L y ¼L z ¼270 mm are the distances between each pair of laser monitoring points (e.g., L x is the distance between the laser points of sensors X 1 and X 2 ). The 6-dof actuation system consists of six pairs of solenoids.…”

Section: Maglev Stabilisation Systemmentioning

confidence: 99%

Vibration isolation using six degree-of-freedom quasi-zero stiffness magnetic levitation

Zhu

Cazzolato

Robertson

et al. 2015

Journal of Sound and Vibration

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Section: Maglev Stabilisation Systemmentioning

confidence: 99%

Vibration isolation using six degree-of-freedom quasi-zero stiffness magnetic levitation

Zhu

Cazzolato

Robertson

et al. 2015

Journal of Sound and Vibration

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“…Magnetic drive is widely utilized in many electrical devices and engineering applications due to its advantages, such as non-contact actuation, less friction, no medium limitation, and simple structure. Many magnetic machines such as magnetic bearings, [1][2][3][4] magnetic pumps, [5][6][7] magnetic valves, 8,9 magnetic springs [10][11][12] magnetic couplings, 13,14 magnetic gears, 15,16 etc. rely on permanent magnets (PMs) to transfer force and torque.…”

Section: Introductionmentioning

confidence: 99%

Calculation of field and force of Halbach arrays: Improved magnetic charge method for irregular magnetized magnets

Liu

Dong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Permanent magnets (PMs) are widely used in magnetic machinery. To better predict the performance of PMs, the magnetic field and force need to be calculated. In general applications, PMs are usually magnetized in a direction parallel to their symmetry axes, and the equivalent magnetic charge method (EMCM) can be used to calculate the corresponding magnetic field and force. However, in some particular cases, such as Halbach arrays, the magnetizing directions or shapes of PMs are irregular and cannot be modeled by the normal EMCM that is limited to the magnets with regular shapes and magnetizing directions. In this paper, an improved EMCM is proposed to calculate PMs with irregular magnetizing directions and shapes. The general rules of magnetic charge distribution are given. The standard forms for calculating magnets with irregular magnetizing directions are obtained through the orthogonal decomposition of the magnetizing direction to simplify the calculation. As an illustration, semi-analytical expressions for magnetic field and force of arc-shaped PMs with irregular magnetizing direction are obtained. Furthermore, the application of this method to calculate the 3-D magnetic field and axial magnetic force of Halbach arrays is discussed and compared with the finite element method (FEM) and experimental measurement. It shows that the improved EMCM has good accuracy and greatly reduces the time cost, which can provide reference for the structure design.

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“…Magnetic springs are being researched for use in vibration isolators [1][2][3][4][5][6][7][8][9][10][11][12][13][14], energy scavenging devices [15][16][17], robot actuators [18], as well as permanent magnet bearings [19][20][21][22]. All of the magnet springs that have been studied to-date appear to operate by using the north-south repulsion between vertical magnets [3-8, 17, 18] or horizontally positioned magnets [1-3, 9, 11, 18, 21].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Performance of a New Type of Preloaded Linear Stroke Length Magnetic Spring

Baninajar¹,

Bird²,

Albarran³

2021

PIER C

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This paper presents the analytic analysis and proof-of-principle prototyping of a new type of magnetic spring with preload and a linear stroke length. An analytic based magnetic charge modeling approach is utilized to investigate design rules that can maximize the magnetic spring's energy density, stiffness characteristics, and linearity. It is shown that whilst the proposed magnetic spring has a lower mass and energy density than a mechanical spring, the magnetic spring offers several unique characteristics, such as contact-free operation, inherent preload, as well as over-force failure protection. In addition, the operating principle of the presented magnetic spring can be extended to realize both positive and negative variable stiffness adjustment characteristics.

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Design study on a magnetic gravity compensator with unequal magnet arrays

Cited by 27 publications

References 19 publications

Vibration isolation using six degree-of-freedom quasi-zero stiffness magnetic levitation

Vibration isolation using six degree-of-freedom quasi-zero stiffness magnetic levitation

Calculation of field and force of Halbach arrays: Improved magnetic charge method for irregular magnetized magnets

Investigating the Performance of a New Type of Preloaded Linear Stroke Length Magnetic Spring

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