Results 211 to 220 of about 1,558 (264)

Knowledge map of transcranial magnetic stimulation for insomnia: a bibliometric and visual analysis. [PDF]

Front Psychiatry
Zhao Y, Wang X, Huang L, Li W.
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Cooling of an Active Magnetic Bearing

Известия высших учебных заведений. Электромеханика, 2021
In this paper temperature field of the magnetic bearing of a gas compressor unit was considered. A two dimension mathematical model was prepared. Model parameters were calculated with using of analytical techniques and laws of similarity. In result of numerical simulation temperature distribution of the magnetic bearing was made specific.
Yuri Ivannikov, Aleksandr Goriachkin, Dmitry Bragin   +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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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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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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Fuzzy logic control of active magnetic bearing

Proceedings of the 2004 IEEE International Conference on Control Applications, 2004., 2005
This work addresses the feasibility of fuzzy logic control of active magnetic bearing in order to suppress the vibration of the shaft while running at the critical speeds. Three fuzzy controllers were synthesized. The first controller uses the displacements at the bearings as inputs, while the second controller includes the displacements as well as the
Sohair F. Rezeka, Taher Awad, Amr Saafan, A. Y. Elmahdy   +3 more
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Control of active magnetic bearings with a smart bias

Proceedings of the 41st IEEE Conference on Decision and Control, 2002., 2003
In this paper, we address the problem of controlling an active magnetic bearing (AMB) with reduced ohmic power losses. A solution is proposed which introduces a "smart" bias flux in the nonlinear control law. The bias is smart in the sense that it is a function of the rotor states, and varies online in a manner that reduces AMB power losses and avoids ...
Nader Motee, Marcio S. de Queiroz
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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 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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