Low-stiction magnetic bearing for satellite application
Low-stiction magnetic bearing for satellite application
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DOI：
10.1063/1.1452673
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发表时间：
2002-05-15
影响因子：
3.2
通讯作者：
Sivadasan, KK
中科院分区：
文献类型：
--
作者：
Rajagopal, KR;Sivadasan, KK
本文介绍了一种用于遥感卫星反作用轮的低粘滞双轴主动磁轴承的设计与研制。对磁路进行了常规设计，并利用有限元分析对设计进行了改进。本文还介绍了将磁轴承的粘转矩降低到小于1 × 10(-4) Nm的极低值的研究结果。理想的零粘滞，运动和静止部件之间的齿槽必须为零。在卫星的反作用轮中，将有一个永磁无刷直流电机作为驱动电机。磁或涡流传感器存在于电机换向电路中，将引起运动部件和静止部件之间的齿槽。在这项工作中，通过适当地设计所有子系统，阻力已降至低至0.75x10(-4) Nm。经有限元分析，研制的磁轴承的试验结果与计算值吻合较好。(C) 2002年美国物理研究所。
In this article, the design and development of a low-stiction two-axis-active magnetic bearing used in the reaction wheel of a remote sensing satellite is presented. Conventional design of the magnetic circuit and improvements in the design using finite element (FE) analysis were carried out. The results of investigations carried out to bring down the stiction torque of the magnetic bearing to a very low value of less than 1x10(-4) Nm are also presented. Ideally for zero stiction, the cogging between the moving and stationary parts must be zero. In a reaction wheel of the satellite, there will be a permanent magnet brushless dc motor as the drive motor. Magnetic or eddy current sensors present in the motor commutation circuit will induce cogging between the moving and stationary parts. In this work, by properly designing all subsystems, the stiction has been brought down to as low as 0.75x10(-4) Nm. Test results of the developed magnetic bearing match fairly with the computed values by FE analysis. (C) 2002 American Institute of Physics.