Research on a Low Power Consumption Six-Pole Heteropolar Hybrid Magnetic Bearing

This paper reports the work on a six-pole heteropolar radial hybrid magnetic bearing (HMB). Its configuration and working principle are introduced. The mathematical model is built based on equivalent magnetic circuit and coordinate transformation method. The model shows that the coupling in x and y...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2013-08, Vol.49 (8), p.4918-4926
Main Authors: Ji, Li, Xu, Longxiang, Jin, Chaowu
Format: Article
Language:English
Subjects:
Active control
Cross-disciplinary physics: materials science
rheology
Dynamical systems
Dynamics
Exact sciences and technology
Force
Heteropolar
hybrid magnetic bearing
Iron
low power consumption
Magnetic bearings
Magnetic flux
Magnetic levitation
Magnetism
Materials science
Mathematical model
Mathematical models
Maximization
Other topics in materials science
Permanent magnets
Physics
Power consumption
Rotors
six-pole
Studies
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Description
Summary:This paper reports the work on a six-pole heteropolar radial hybrid magnetic bearing (HMB). Its configuration and working principle are introduced. The mathematical model is built based on equivalent magnetic circuit and coordinate transformation method. The model shows that the coupling in x and y directions is very low and can be ignored when the rotor is around the central position. A decoupling controller for this six-pole HMB is obtained. A design principle for bias flux density is presented based on maximization of load capacity in different directions, through which a prototype six-pole HMB for a five-degrees-of-freedom magnetic bearing system is designed and assembled. Both the simulation and experimental results show that the rotor can be suspended steadily and the whole control system has good dynamic and static performance. Finally, tests were done to determine power losses. As a result, the total power consumption of this six-pole HMB is just 12.77 W for a 2.2 kg rotor, which is only 13.35% of a traditional eight-pole active magnetic bearing with the same load capacity.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2238678