Optimization of Axially Magnetized Stack Structured Permanent Magnet Thrust Bearing Using Three-Dimensional Mathematical Model

Bekinal, Siddappa Iranna; Doddamani, Mrityunjay; Jana, Soumendu

doi:10.1115/1.4034533

Cited by 17 publications

(23 citation statements)

References 21 publications

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“…The proposed optimized results of the conventional configuration using 2D analytical equations are compared with the optimized results available in the literature [13]. In [13], optimization was carried out using 3D equations for the same aspect ratio of the configuration.…”

Section: Comparison Of Optimized Results Obtained Using 2d and 3d Equmentioning

confidence: 99%

“…In [13], optimization was carried out using 3D equations for the same aspect ratio of the configuration. Comparison results for the conventional configuration are presented in Table 4.…”

Section: Comparison Of Optimized Results Obtained Using 2d and 3d Equmentioning

confidence: 99%

“…Lijesh and Hirani [12] optimized radial passive magnetic bearing with a single ring pair using modified 2D equations. Bekinal et al [13] presented the effectiveness of optimization in conventional multi rings thrust bearing using 3D equations in a given space for maximum bearing features. Recently, Beneden et al [14] carried out the optimization for all possible kinds of multi rings PM thrust bearing for maximum bearing characteristics using 2D equations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Utilization of Low Computational Cost Two Dimensional Analytical Equations in Optimization of Multi Rings Permanent Magnet Thrust Bearings

Bekinal¹,

Doddamani²,

Dravid³

2017

PIER M

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Abstract-Replacement of conventional bearings by passive magnetic bearings for high-speed applications, in terms of their performance will be effective, if the design is carried out by optimizing the geometrical dimensions in the given control volume. Present work deals with modification and utilization of two-dimensional (2D) analytical equations in optimization of multi rings permanent magnet (PM) thrust bearing configurations. Conventional and rotational magnetized direction (RMD) configurations are selected in optimizing the design variables for maximum bearing characteristics in a given volume with a constant aspect ratio. The design variables chosen for optimization are axial offset of rotor, number of rings, radial air thickness and inner diameter of the rotor and stator PM rings. MATLAB codes for solving 2D equations are developed in optimizing configuration variables. Further, optimized parameter values of the two configurations are compared. Finally, optimized results obtained using 2D and three-dimensional (3D) equations for the conventional configuration with same aspect ratio are compared, and conclusions are presented.

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Section: Comparison Of Optimized Results Obtained Using 2d and 3d Equmentioning

confidence: 99%

“…In [13], optimization was carried out using 3D equations for the same aspect ratio of the configuration. Comparison results for the conventional configuration are presented in Table 4.…”

Section: Comparison Of Optimized Results Obtained Using 2d and 3d Equmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of Low Computational Cost Two Dimensional Analytical Equations in Optimization of Multi Rings Permanent Magnet Thrust Bearings

Bekinal¹,

Doddamani²,

Dravid³

2017

PIER M

View full text Add to dashboard Cite

show abstract

“…In [23], the authors used 2D analytical equations for optimizing different multi-layer thrust PMB structures for maximum characteristics. Bekinal et al [24,25] presented the optimization of conventional and RMD structures of multi-ring thrust PMBs using 3D equations and presented the generalized curves for the design variables in terms of the air gap. Despite the attractive features, the major issue associated with PMB is low damping.…”

Section: Introductionmentioning

confidence: 99%

Optimum Design Methodology for Axially Polarized Multi-Ring Radial and Thrust Permanent Magnet Bearings

Bekinal¹,

Doddamani²

2020

PIER B

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This article deals with the generalized procedure of designing and optimizing multi-ring radial and thrust permanent magnet bearings (PMBs) with an axial air gap for maximum force and stiffness per volume of the magnet. Initially, the procedure of determining optimized design variables in both the configurations is presented using the MATLAB codes written for solving the three dimensional (3D) equations of force and stiffness in PMB having 'n' number of rings on the stator and rotor. The maximized results of the forces in both radial and thrust multi-ring PMBs are validated with the values obtained using finite element analysis (FEA). Then, the correlation between the optimized parameters and the air gap is obtained, and curve fit equations for the same are proposed in terms of stator outer diameter. Further, curve fit equations establishing the relationship between the maximized bearing features, and the aspect ratio (L/D4) of the bearing are expressed for different values of air gap in both the radial and thrust bearings. Finally, the generalized method of designing and optimizing the multi-ring PMB is demonstrated with a specific application. A designer can use the presented curve fit equations for optimizing design variables and calculating maximized bearing features in multi-ring radial and thrust PMBs easily just by knowing the bearing features for a single ring pair.

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“…Further, many researchers [20][21][22] presented the equations to address the calculation of bearing features in multiring PMB. Optimization of geometrical dimensions of PMB for achieving their maximum characteristics was presented by the number of researchers in radial [23,24] and thrust [25][26][27][28][29][30] bearings. In the preceding literature on optimization of PMB, researchers focussed on the following points; (i) multilayer radial PMB was optimized in a given cylindrical volume for maximum radial stiffness using finite element simulation method [23], whereas complete optimization was carried out in [24] using 3D equations for maximizing radial force.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the Design Calculations of Multi Ring Permanent Magnet Thrust Bearing

Bekinal¹,

Doddamani²

2020

PIER M

Self Cite

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This article presents the design and optimization of multi-ring permanent magnet thrust bearing (PMTB) with an axial air gap between successive axial stacks. Larger air gap due to the inclusion of conductive materials needs to be critically analysed in permanent magnet bearings with eddy current damper. High conductivity materials can be filled in an axial air gap instead of a radial air gap to increase the required amount of damping. Three-dimensional (3D) mathematical model for loadcarrying capacity for the said configuration is presented using the Coulombain model. The significance of an axial air gap between successive ring pairs in the configuration concerning maximization in the bearing characteristics is presented. Variables such as the number of axial stacks, an axial air gap between the successive rings, an inside radius of rotor ring magnets, and an inside radius of stator ring magnets are optimized at different air gap values for maximizing the load-carrying capacity and stiffness. A significant increase in the values of bearing characteristics is observed in the optimized configuration as compared to bearing with a single permanent magnet ring pair. Optimized PMTB with comparable load carrying capacity and stiffness values can be used to replace conventional bearings used in highspeed applications to improve system efficiency.

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Optimization of Axially Magnetized Stack Structured Permanent Magnet Thrust Bearing Using Three-Dimensional Mathematical Model

Cited by 17 publications

References 21 publications

Utilization of Low Computational Cost Two Dimensional Analytical Equations in Optimization of Multi Rings Permanent Magnet Thrust Bearings

Utilization of Low Computational Cost Two Dimensional Analytical Equations in Optimization of Multi Rings Permanent Magnet Thrust Bearings

Optimum Design Methodology for Axially Polarized Multi-Ring Radial and Thrust Permanent Magnet Bearings

Improvement in the Design Calculations of Multi Ring Permanent Magnet Thrust Bearing

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