Comparison of Load Capacity and Inductance for Common Active Magnetic Bearings Designs
Active magnetic bearings have become more popular as an alternative to fluid-film or rolling element bearings in rotating machinery. They have also become a method for force excitation for rotordynamic experiments, including system identification experiments. The current work considers alternate active magnetic bearing designs for a fluid film bearing test rig. The three designs considered include a conventional 8-pole design with equal widths, a 12-pole bearing with e-core quadrants, and a 16-pole alternate with two exterior auxiliary poles and two interior main poles per quadrant. Several previous studies have considered equal pole widths in optimizing magnetic bearing stator geometry. While not an optimization study, this analysis presents a comparison of popular AMB geometries commonly used in industrial applications. The load capacity, magnetic field energy, and inductance were compared. The 16-pole bearing was shown to have the highest load capacity of the three designs. The inductive load also increased with increasing number of poles. The 12 and 16 pole designs, with reduced auxiliary pole width, also exhibited better containment of the magnetic flux within each active magnetic bearing quadrant, which simplifies the control problem. The results are of use for AMB designers and provide guidance for future stator optimization studies.
Active Magnetic Bearings Load Capacity Inductance
Timothy Dimond Robert Rockwell, JR Gregory Simmons Paul Allaire
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,Unive Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,Unive Department of Machine Elements, LULE(A) University of Technology 97187 LULE(a), Sweden
国际会议
The Twelfth International Symposium on Magnetic Bearings(第十二届国际磁悬浮轴承学术会议)
武汉
英文
673-682
2010-08-22（万方平台首次上网日期，不代表论文的发表时间）