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Improvements of the Integration of Active Magnetic Bearings
IFAC Proceedings Volumes, 2000Abstract 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, 1980Abstract 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, 1998Active 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., 2005This 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 +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., 2003In 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, 1992Abstract 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, 2004Abstract 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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Control of compressor surge with Active Magnetic Bearings
49th IEEE Conference on Decision and Control (CDC), 2010The design of an active surge controller, which employs Active Magnetic Bearings (AMBs) to stabilize the flow in the compressor, is presented in this paper. The axial tip clearance of an unshrouded centrifugal impeller from a single stage compressor is modulated relative to the static shroud to induce a pressure variation in the compressor output ...
Se Young Yoon +3 more
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Losses estimation and modelling in active magnetic bearings
2014 16th European Conference on Power Electronics and Applications, 2014Active magnetic bearings (AMBs) are becoming very popular in high speed electrical machines applications in the last decade. As the interest in them grows the necessity to optimise all the aspects of their operation arises. This paper presents the analytical way of calculating losses of active magnetic bearings based on reluctance network method.
Romanenko Aleksei +3 more
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ANFIS controller for an Active Magnetic Bearing system
2013 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE), 2013This paper proposes an intelligent control method for positioning an Active Magnetic Bearing (AMB) system, using the emerging approaches of the Fuzzy Logic Controller (FLC) and Adaptive Neuro-Fuzzy Inference System (ANFIS). An AMB system depends on control of the air gap between the stator and the rotor.
Seng-Chi Chen +3 more
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