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    • 58. 发明公开
    • Magnetic bearing apparatus
    • 磁轴承
    • EP1176325A2
    • 2002-01-30
    • EP01118169.0
    • 2001-07-26
    • EBARA CORPORATION
    • Shinozaki, Hiroyuki
    • F16C39/06
    • F16C32/0457F16C2360/45
    • There is provided a magnetic bearing apparatus having no necessity of providing a magnetic flux sensor in the vicinity of a supporting electromagnet and no necessity of increasing the number of signal lines in a cable and capable of achieving an advantage similar to a conventional magnet flux feedback type power amplifier in a controller. The magnetic bearing apparatus for supporting a supported member by a magnetic force without contact comprises a current sensor (11) for detecting a control current output from a power amplifier (7) and a displacement sensor (10) for detecting a displacement of the supported member (1).
      A control current detection signal Si of the current sensor (11) and a displacement detection signal Sg of the displacement sensor (10) are supplied to an estimator (20) that estimates a magnetic flux or magnetic flux density generated between a surface of the electromagnet (4) and an electromagnetic target (3) on the supported member (1). An estimated value is fed back from the estimator (20) to the power amplifier (7) that supplies a control current i to an electromagnetic coil (6).
    • 60. 发明公开
    • Substrate rotating apparatus
    • Substratdrehvorrichtung
    • EP1162651A2
    • 2001-12-12
    • EP01113981.3
    • 2001-06-08
    • EBARA CORPORATION
    • Shinozaki, Hiroyuki
    • H01L21/00
    • H01L21/68792
    • An apparatus for rotating a semiconductor substrate is provided which comprises a substrate holder for carrying the substrate thereon, a rotor for directly or indirectly supporting the substrate holder, a magnetic floating mechanism for magnetically floating and supporting the rotor in a non-contact state, and magnetic rotating mechanism for magnetically rotating the rotor. The magnetic floating mechanism and magnetic rotating mechanism are formed as a single integral unit structure. The unit structure includes a first set of windings for generating a magnetic field to provide the rotor with a rotating force, and a second set of windings for generating a magnetic field to float and support the rotor at a predetermined position. The first and second sets of windings are disposed on a single yoke plate made of a magnetic material.
    • 提供了一种用于旋转半导体衬底的装置,其包括用于承载衬底的衬底保持器,用于直接或间接支撑衬底保持器的转子,用于以非接触状态磁浮动和支撑转子的磁浮动机构,以及 用于使转子磁转的磁旋转机构。 磁浮机构和磁旋转机构形成为单个整体单元结构。 单元结构包括用于产生磁场以向转子提供旋转力的第一组绕组和用于产生磁场的第二组绕组,用于将转子浮动并支撑在预定位置。 第一和第二组绕组设置在由磁性材料制成的单个磁轭板上。