Fault tolerant magnetic bearings
Fault tolerant magnetic bearings
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容错磁力轴承
DOI：
10.1115/1.2818501
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发表时间：
1999
影响因子：
1.5
通讯作者：
R. J. Aimone
中科院分区：
文献类型：
--
作者：
E. Maslen;C. K. Sortore;G. Gillies;Ronald D. Williams;S. Fedigan;R. J. Aimone
开发了容错磁力轴承系统，并在大型柔性转子试验台上进行了演示。该轴承系统包括一个高速、容错数字控制器、三个高容量径向磁力轴承、一个推力轴承、传统的可变磁阻位置传感器和一系列商用开关放大器。控制器容错是通过超高速投票机制实现的，该机制通过供电的备用 CPU 实现三重模块化冗余，从而允许最多三个 CPU 模块发生故障而不会出现系统故障。放大器/电缆/线圈容错是通过为每个轴承线圈使用单独的功率放大器并允许控制器在检测到故障时重新配置放大器来实现的。这样可以对故障放大器进行热更换，而不会降低系统性能，也不会提供超出标称系统要求的任何多余的放大器 kVA 容量。该系统在大型（2440 毫米长）柔性转子上实施，显示出出色的故障抑制能力，包括三个 CPU 故障以及控制整个定子象限的两个相邻放大器（或电缆）故障。
A fault tolerant magnetic bearing system was developed and demonstrated on a large flexible-rotor test rig. The bearing system comprises a high speed, fault tolerant digital controller, three high capacity radial magnetic bearings, one thrust bearing, conventional variable reluctance position sensors, and an array of commercial switching amplifiers. Controller fault tolerance is achieved through a very high speed voting mechanism which implements triple modular redundancy with a powered spare CPU, thereby permitting failure of up to three CPU modules without system failure. Amplifier/cabling/coil fault tolerance is achieved by using a separate power amplifier for each bearing coil and permitting amplifier reconfiguration by the controller upon detection of faults. This allows hot replacement of failed amplifiers without any system degradation and without providing any excess amplifier kVA capacity over the nominal system requirement. Implemented on a large (2440 mm in length) flexible rotor, the system shows excellent rejection of faults including the failure of three CPUs as well as failure of two adjacent amplifiers (or cabling) controlling an entire stator quadrant.