Results 261 to 270 of about 30,298 (314)

Soft magnetic composites in active magnetic bearings

IEE Colloquium on New Magnetic Materials - Bonded Iron, Lamination Steels, Sintered Iron and Permanent Magnets, 1998
Active magnetic bearings are being considered increasingly for high-speed electrical machines, since they eliminate frictional losses and are virtually maintenance-free. However, in addition to the copper loss in the coils, there may be a significant eddy current and hysteresis loss in the soft magnetic rotor.
P. Mason, D. Nowe, K. Atallah
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An active magnetic bearing system

Precision Engineering, 1980
Abstract This paper describes the principles of design and operation of the Actidyne active magnetic bearing system. The principal advantages of this system are due to the absence of mechanical contact, obviating the need for lubrication, and to the high accuracy of shaft position.
H. Habermann, G. Liard
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Active magnetic bearing design study

Journal of Vibration and Control, 2012
The purpose of this paper is to propose a useful method to implement active magnetic bearings (AMBs) on an existing rotating shaft which rotates on conventional bearings. This is feasible if AMBs can produce the same reaction loads of conventional ones and if the size of vane is large enough to host an AMB.
BARBARACI, Gabriele, VIRZI' MARIOTTI, Gabriele, Piscopo, A.   +2 more
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Active magnetic bearings for machining applications

Control Engineering Practice, 2004
Abstract High-speed machining offers substantial economic benefits due to increased metal cutting productivity. Critical to realizing this technology's promise are the intertwined challenges of spindle dynamic stiffness and cutting process stability.
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Controlling Journal Bearing Instability Using Active Magnetic Bearings

Volume 5: Turbo Expo 2007, 2007
Journal Bearings are excellent bearings due to their large load carrying capacity and favorable damping characteristics. However, Journal bearings are known to be prone to instabilities. The oil whirl and oil whip instabilities limit the rotor maximum rotating speed.
A. El-Shafei, A. S. Dimitri
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Digital multivariable control of active magnetic bearings

IFAC Proceedings Volumes, 1992
Abstract That paper deals with digital control of active magnetic bearings as a non linear system. The considered process is a horizontal shaft which is suspended by means of electromagnetic forces. The model of such a process involves a linear part linking positions and velocity to forces, and a non linear one introduced by electromagnet behavior ...
P. Mouille, J. Lottin
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Active Magnetic Bearing System Research

2019 III International Conference on Control in Technical Systems (CTS), 2019
In this article the tasks of constructing and studying the characteristics of electromagnets in an active magnetic bearing (AMB) is studied. The following results are presented in the work: description of a physical object, the process of creating a metrological stand, plan and methodology for conducting research.
Grigorii V. Belskii, Aleksandr P. Rastorguev, Aleksandr A. Lyamkin   +2 more
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Improvements of the Integration of Active Magnetic Bearings

IFAC Proceedings Volumes, 2000
Abstract Functional and structural integration are tools to improve mechatronic systems that include active magnetic bearing systems. In this paper two aspects of the integration of electromagnetic bearings are presented: 1. The non-linearity of the magnetic force is compensated by software integrated in the digital controller. 2.
Norbert Skricka, Richard Markert
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Axial active magnetic bearing design

Journal of Vibration and Control, 2014
The purpose of this paper is to propose a useful method to implement active magnetic bearings (AMBs) on an existing rotating shaft which rotates on conventional bearings. This is feasible if AMBs can produce the same reaction loads of conventional ones and if the size of the vane is large enough to host an AMB.
openaire   +1 more source

Unbalancing estimation in active magnetic bearings

Proceedings of IEEE Systems Man and Cybernetics Conference - SMC, 2002
This paper deals with state reconstruction of a discrete linear time varying system which is influenced by constant disturbance adding to control input, and sinusoidal perturbations on measure signals. The process under consideration is composed of a horizontal rotating shaft, suspended by means of active magnetic bearings, that requires a control ...
P. Mouille, J. Lottin
openaire   +1 more source