Integral Design and Analysis of Passive Magnetic Bearing and Active Radial Magnetic Bearing for Agile Satellite Application

Han, Bangcheng; Zheng, Shiqiang; Wang, Xi; Yuan, Qian

doi:10.1109/tmag.2011.2180731

Cited by 79 publications

(14 citation statements)

References 11 publications

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“…Nguyen et al [11] used parameter optimization of Axial Flux Permanent Magnet Machine to reduce axial bearing stress and losses. Han Bangcheng [12] discussed sensitiveness of positional stiffness and suggested method to mitigate by using Permanent magnet biased RMB in magnetic structure. Lim and Min et al [13] used multi-phase level-set model and used multi-material concept for maximizing EM force with set volume constraint of permanent magnet.…”

Section: Literature Reviewmentioning

confidence: 99%

Design optimization of large gap single axis thrust magnetic bearing actuator

Dash

Rajan

2015

JAE

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Magnetic Bearing, especially Active Magnetic Bearing (AMB) is arguably most preferred bearing for the process dealing with highly reactive environment, high speed operation and where the process required least contamination. They are also being tried for Fly wheels and Wind generators. They continue to be evolved since last several decades. Quite a few processes like application of AMB in high temperature Liquid Sodium high temperature applications call for development of large-working-gap active magnetic bearings (AMB). Smooth operation of AMB depends on hypersensitive position stiffness and Current stiffness, which fluctuates due to differential-thermal-expansion induced air gap variation. So, large gap, necessitates flatter open loop position stiffness than that of contemporary magnetic actuators. In this work, a goal seeking optimization methodology is employed for double acting AMB system where a combination of higher (CRGO electrical steel) and lower saturating magnetic material (Mu metal) is used. A less variant position stiffness across the air gap was arrived at after getting optimized design variables constituting geometry and excitation current parameters. This investigation opens up a new way to attain position stiffness in AMB system which is less sensitive to positional variation of rotor in air gap.This paper proposes an innovative and first-of-its-kind bi-material core material with goal driven optimized magnetic actuator design which can afford to have air gap variation during operation.

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Section: Literature Reviewmentioning

confidence: 99%

Design optimization of large gap single axis thrust magnetic bearing actuator

Dash

Rajan

2015

JAE

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“…[1][2][3][4] Therefore, MBs are being increasingly considered as a preferred alternative to conventional mechanical bearing designs in compressors as power densities and operating conditions become more extreme. [5][6][7] The development trend of modern compressor is to higher speeds and thinner shafts to improve operating efficiencies.…”

Section: Introductionmentioning

confidence: 99%

An integrated passive magnetic damping system for high-speed compressor with flexible rotor

Fang

Sun

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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To provide a more reliable rotor damping system for high-speed compressor with flexible rotor, a passive magnetic damping integrated with an active axial bearing (PMDAB) system is proposed. The PMDAB system can provide active force in axial direction and also can provide damping force without control system in radial direction. To enhance the damping ability of the system, an analytical model is set up especially for the high-speed vibration rotor, and the relation between resistance of radial coils and the provided damping force is discussed for the first time. The coupling characteristic between passive radial damping coefficient and active axial bearing stiffness is also analyzed; the result shows that the coupling is too small, therefore can be neglected. Finally, a design example for a high-speed compressor is given based on electromagnetic analysis of PMDAB and dynamic analysis of the flexible rotor. The analytical and design results, which are verified by the finite element method result, show that the PMDAB is effective in controlling the first bending vibration of flexible rotor.

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“…HMB includes electromagnet and permanent magnet to use permanent magnets field in light loads to decrease charges, an extra charge should be paid for control system that is in alert situation and by activation of the control system, the losses owing to this is appeared. However, by increasing the requirements of shafting precision, AMB and HMB are introduced to improve the PMBs operation [10], [13]. Many research papers have been published on passive magnetic bearings [13]- [15], but acceptable operation of PMB is strongly dependent on the characteristics of the permanent magnets and PMBs configuration and arrangement of magnets in that configuration.…”

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confidence: 99%

Design of a new structure passive magnetic bearing with radial magnetization using FEM

Tir

Mirimani

2014

2014 22nd Iranian Conference on Electrical Engineering (ICEE)

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This paper investigates a new structure of passive magnetic bearings (PMB) that includes three ring shaped permanent magnets which can increase safety and accuracy in holding rotor in its correct position with greater force and stiffness amplitude. According to the axial symmetry around the z-axis in the structure of PMB, it is modeled using twodimensional finite-element method (2D-FEM). Using this approximation, it becomes possible to calculate magnetic force and stiffness in the minimum computation time than threedimensional finite-element method (3D-FEM). Sensitivity analysis is done to achieve the best configuration of new structure. Also it investigates prevalent structure of PMB that includes two ring shaped permanent magnets. A good comparison for the force and stiffness amplitude is done between previous structure and proposed structure by FEM. By considering force density as a reference, two structures are compared for the financial matters.Index Terms-Magnetic force, magnetic stiffness, passive magneic bearing (PMB), two-dimensional finite-element method (2D-FEM).

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Integral Design and Analysis of Passive Magnetic Bearing and Active Radial Magnetic Bearing for Agile Satellite Application

Cited by 79 publications

References 11 publications

Design optimization of large gap single axis thrust magnetic bearing actuator

Design optimization of large gap single axis thrust magnetic bearing actuator

An integrated passive magnetic damping system for high-speed compressor with flexible rotor

Design of a new structure passive magnetic bearing with radial magnetization using FEM

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