Modeling and control of a new horizontal-shaft hybrid-type magnetic bearing

Mukhopadhyay, Subhas Chandra; Ohji, Takahisa; Iwahara, M.; Yamada, S.

doi:10.1109/41.824131

Cited by 49 publications

(32 citation statements)

References 7 publications

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“…10 and 11, half ring magnet should be a choice for radial magnetic bearings. But as per Mukhopadhyay et al [6], [7], "Configuration 3" (180 and 45 arc magnets) provides the best results. To resolve the issue of "which configuration is better," one needs experimental verification.…”

Section: B Surface Charge Density Methodsmentioning

confidence: 97%

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Magnetic Bearing Configurations: Theoretical and Experimental Studies

Samanta

Hirani

2008

IEEE Trans. Magn.

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A radial magnetic bearing, consisting of two permanent magnets, is an attractive choice because of its zero wear, negligible friction, and low cost, but it suffers from low load capacity, low radial stiffness, lack of damping, and high axial instability. To enhance the radial load and radial stiffness, and reduce the axial thrust, we have made a theoretical and experimental study of various radial configurations, including hydrodynamic lubrication to improve dynamic performance of the magnetic bearing. We developed an experimental setup to investigate the performance of bearing configurations under different operating conditions. The motion of a rotating shaft is mapped by two displacement sensors with a data acquisition system and personal computer. The first critical speed of each configuration is determined experimentally and verified through frequency analysis. We present a polar plot of displacement data.Index Terms-Hydrodynamic bearing, low-friction bearing, natural frequency of magnetic bearing, permanent-magnet bearing, wearless bearing.

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Section: B Surface Charge Density Methodsmentioning

confidence: 97%

“…But Mukhopadhyay et al [6], [7], established "Configuration 3" (180 and 45 arc magnets) as the best configuration for radial permanent-magnet bearings. Scientifically, all three configurations have their own merits and demerits.…”

Section: A Observations In Stage 1 Experimentsmentioning

confidence: 99%

Magnetic Bearing Configurations: Theoretical and Experimental Studies

Samanta

Hirani

2008

IEEE Trans. Magn.

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“…By the literature [21][22][23][24], load mass is a big reason to change motion trail. With the addition of mass, the trend or over-steering is increasing.…”

Section: Control Of Steering Speedmentioning

confidence: 99%

Research of the Forklift Power-Assisted Steering System Based on Safety Steering Speed Control

Xiao

2015

International Journal on Smart Sensing and Intelligent Systems

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Abstract-Enhancing the safety of forklift power-assisted steering system is a problem urgently to be solved in practice. First of all, forklift power-assisted steering system model is established according to Lagrange dynamical equations, and three variable assistance characteristics curve fitted for reach trucks is designed combined with fuzzy control algorithm. Then sliding mode variable-structure control method based on motor current control is used tracking the target current and making contrast with the traditional PID in order to justify the validity of the algorithm. Finally, the expression of speed with tri-function is built. Optimization of safety speed is added on the basis of traditional power-assisted steering to ensure the stability and security of forklift steering.

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“…So design of such bearing needs to crack the equations of force which is a very complex function of many geometrical and operational parameters. The methods available to solve the equation of force between two ring magnets are finite element method (FEM) [4], three dimensional (3D) numerical method [5], semi-analytical method [6,7] and analytical method [8,9]. Lijesh and Hirani [10] developed some analytical equations for design optimization of magnetic bearing.…”

Section: Introductionmentioning

confidence: 99%

“…So the total force on rotor is given by the summation of these four forces. By surveying literatures [4,8,9], the radial force (F r ) and axial force (F a ) are given by Eqs. (1) and (2) respectively.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Passive Magnetic Force in a Radial Magnetic Bearing Using General Division Approach

Santra¹,

Roy²,

Choudhury³

2017

PIER M

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Abstract-This paper represents the force calculation in a radial passive magnetic bearing using Monte Carlo technique with general division approach (s-MC). The expression of magnetic force is obtained using magnetic surface charge density method which incurs a multidimensional integration with complicated integrand. This integration is solved using Monte Carlo technique with 1-division (1-MC) and 2-division (2-MC) approaches with a MATLAB programming. Analysis using established methods such as finite element method (FEM), semi-analytical method, and adaptive Monte Carlo (AMC) method has been carried out to support the proposed technique. Laboratory experiment has been conducted to validate the proposed method. 2-MC gives better result than 1-MC. The computation time of the proposed method is compared with the quadrature method, FEM and AMC. It is observed that the proposed method invites less computational burden than those methods as the algorithm adaptively traverses the domain for promising parts of the domain only, and all the elementary regions are not considered with equal importance.

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Modeling and control of a new horizontal-shaft hybrid-type magnetic bearing

Cited by 49 publications

References 7 publications

Magnetic Bearing Configurations: Theoretical and Experimental Studies

Magnetic Bearing Configurations: Theoretical and Experimental Studies

Research of the Forklift Power-Assisted Steering System Based on Safety Steering Speed Control

Calculation of Passive Magnetic Force in a Radial Magnetic Bearing Using General Division Approach

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