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首页> 外文会议>Annual meeting on American Society for Precision Engineering >The High Precision Lienar Motion Table With a Novel Rare Earth permanent Magnet Biased Magnetic Baring Suspension
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The High Precision Lienar Motion Table With a Novel Rare Earth permanent Magnet Biased Magnetic Baring Suspension

机译：新型稀土永磁偏置磁悬浮轴承高精度直线运动台

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An electromagnetic bearing needs large amount of bias current to support its own weight so taht its load capacity is limited and problems caused by ehat generation cna be arose. In order to remove these drawbacks of the electromagnetic bearing, we developed a novel permanent magnet biased electromagnetic bearing using a rare earth permanent magnet. The permanent magnet provides a bias flux and generates a bias force. the electromagnet can increase or reduce a flux of the permanent magnet and the flux path of the electromagnet does not pass through the permanent magnet that the permanent magnet will not the demagnetized. One actuator can support one control axis and it is composed of one electromagnet and two permanent magnets that it needs one current amplifier for one control axis. We adopt this newly designed electromagnetic bearing system to the 6 D.O.F. linear motion table as a magnetic suspension~[1,2,3]. The linear positioning of hte table with a 100 mm stroke is driven by brushless DC Linear motors and the other 5 D.O.F. of the table are controlled by the digital controller with magnetic bearing actuators. The novel electromagnetic bearing system guarantees the high load capacity and it needs less current htan conventional type of the electromagnetic bering so that it gives low power ocnsumption and elimination of problems caused by the heat generation.
机译：电磁轴承需要大量的偏置电流来支撑其自身的重量，因此其负载能力受到限制，并且会产生因产生噪声而引起的问题。为了消除电磁轴承的这些缺点，我们开发了一种使用稀土永磁体的新型永磁偏置电磁轴承。永磁体提供偏磁通并产生偏压力。电磁体可以增加或减少永磁体的磁通量，并且电磁体的磁通路径不会穿过永磁体，从而使永磁体不会被消磁。一个执行器可以支撑一个控制轴，并且由一个电磁体和两个永磁体组成，一个控制轴需要一个电流放大器。我们将这种新设计的电磁轴承系统应用于6 D.O.F.直线运动表作为磁悬浮〜[1,2,3]。工作台100行程的线性定位是由无刷直流线性电机和其他5个D.O.F驱动的。该表的位置由带有磁性轴承执行器的数字控制器控制。新颖的电磁轴承系统保证了高负载能力，并且在传统类型的电磁密封圈中需要较少的电流，因此它具有较低的功率消耗并消除了由发热引起的问题。

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