Radial forces analysis and rotational speed test of radial permanent magnetic bearing for horizontal axis wind turbine applications

Kriswanto, Kriswanto; Jamari, J.

doi:10.1063/1.4945488

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Otherwise, given the long lifetime of its use then PMB is an effective solution to overcome the bearing problems [7]. The study of PMB in wind turbine prototypes to substitute mechanical bearings can enhance rotational speed and torque, therefore enhancing Horizontal Axis Wind Turbine (HAWT) performance [8]. Comparative study of axial force results of PMB between analytical approach and finite element method shows good agreement between the two [9].…”

Section: Introductionmentioning

confidence: 95%

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Kriswanto

Nuryanto

Prasdiansyah

et al. 2022

ARFMTS

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One way to reduce maintenance costs while improving wind turbine efficiency is to replace mechanical bearings with permanent magnetic bearings. The permanent magnetic bearing is a free contact bearing in which the rotor is elevated from the stator by the magnet's repelling force. The purpose of this study is to analyze the variation of permanent magnet width and the gap distance between the rotor-stator magnets that can produce the magnetic axial force opposing the thrust force of 1MW horizontal axis wind turbines (HAWT). The method used in this study is a magnetic force simulation using finite element method by varying the magnet thickness, width of the gap, and displacement between the rotor-stator of the PMB model. The PMB model consists of rotor and stator magnets arranged in 3 layers with Nd2Fe14B type material with a magnetic flux density of 1.45 T. Variations in thickness of the rotor and stator magnets are 0.1; 0.15, respectively; 0.2 (m), while variations in the width of the magnetic gap are 4, 5, 6 (mm). The results of the study found that the displacement that produces an axial magnetic force that can support a thrust force of 199.5kN is the lowest in the PMB model with a magnetic thickness of 0.15m with a magnetic gap of 4mm, while the highest is at a magnetic thickness of 0.1m with a magnet gap of 6mm. The greater the thickness of the PMB axial magnet design, the greater the displacement that provides zero axial magnetic forces. Further, the maximum of the magnetic axial force is rise on with increasing magnet thickness.

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Section: Introductionmentioning

confidence: 95%

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Kriswanto

Nuryanto

Prasdiansyah

et al. 2022

ARFMTS

View full text Add to dashboard Cite

show abstract

“…If a wind turbine bearing failed, the whole rotor system would be destroyed. Combining magnetic bearings with traditional bearings is a practical solution to the problem of their excessive influence on the rotor system [1,2]. The block Lanczos method and Ansys modal response tools are used to perform the free vibration analysis of the Darrieus-type VAWT system.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of 650 W Vertical-Axis Wind Turbine Rotor System Supported by Radial Permanent Magnet Bearings

Chalageri,

Bekinal,

Doddamani

2023

RAiSE-2023

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“…PMBs do not require any input energy, sensors, electrical and electronics components to perform their function as compared to active magnetic bearings. Due to these attractive features, PMBs have been utilized to support both low [5,6] and high-speed [7][8][9][10][11] rotors in different applications. The mathematical equations addressing force and stiffness characteristics in single as well as multi-ring radial [12][13][14][15] and thrust [16][17][18][19] PMBs have been presented in the literature.…”

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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Radial forces analysis and rotational speed test of radial permanent magnetic bearing for horizontal axis wind turbine applications

Cited by 9 publications

References 5 publications

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Dynamic Analysis of 650 W Vertical-Axis Wind Turbine Rotor System Supported by Radial Permanent Magnet Bearings

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

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