Radially Biased Axial Magnetic Bearings/Motors for Precision Rotary-Axial Spindles

被引:27
|
作者
Usman, Irfan-ur-rab [1 ]
Paone, Matthew [1 ]
Smeds, Kristofer [1 ]
Lu, Xiaodong [1 ]
机构
[1] Univ British Columbia, Dept Mech Engn, Vancouver, BC V6T 1Z4, Canada
基金
加拿大创新基金会;
关键词
Electromagnetic actuators; magnetic bearings; precision positioning; spindles; BEARING; DESIGN; SYSTEM;
D O I
10.1109/TMECH.2011.2119323
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Unlike traditional position holding thrust magnetic bearings, electromagnetic actuators can be advantageously used as both an axial bearing and an in-feed motor in precision machine tools that require only millimeter axial stroke. This paper presents the working principle, design, and analysis of radially biased electromagnetic actuators for precision rotary-axial spindle applications. The analysis results indicate that the radially biased actuator design can offer eight times higher load capacity and 16 times higher force-to-power ratio than conventional horseshoe-type thrust bearings. Experimental results from the constructed rotary-axial spindle prototype demonstrate 5000-N load capacity, 340-N/mu m dynamic stiffness, and 1.5-mm axial stroke with 10-nm motion resolution.
引用
收藏
页码:411 / 420
页数:10
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