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

被引：28

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

来源：

IEEE-ASME TRANSACTIONS ON MECHATRONICS | 2011年 / 16卷 / 03期

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

页码：411 / 420

页数：10