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    LINEAR ACTUATOR
    2.
    发明公开
    LINEAR ACTUATOR 有权
    LINEARBETÄTIGUNGSGLIED

    公开(公告)号：EP1463186A1

    公开(公告)日：2004-09-29

    申请号：EP02788660.5

    申请日：2002-11-26

    申请人： Shinko Electric Co. Ltd.

    发明人： NAKAGAWA, Hiroshi, c/o Shinko Electric Co., Ltd ,  KATO, Kazumichi, c/o Shinko Electric Co., Ltd ,  MIKI, Toshio, c/o Shinko Electric Co., Ltd ,  MAEDA, Minoru, c/o Shinko Electric Co., Ltd ,  FUKUNAGA, Takashi, c/o Shinko Electric Co., Ltd ,  FURUTANI, Kozo, c/o Shinko Electric Co., Ltd ,  SUGIMOTO, Toshiya, c/o Shinko Electric Co., Ltd

    IPC分类号： H02K41/025 ,  H02K41/03 ,  H01F7/16

    CPC分类号： H01F7/1615 ,  H01F7/081 ,  H01F7/122 ,  H02K7/085 ,  H02K21/44 ,  H02K33/16 ,  H02K41/033

    摘要： An object of the present invention is to provide a linear actuator in which reliability is improved, and performance is also easily improved. The present invention provides a linear actuator including a stator, a movable element having an iron member, and being reciprocatable with respect to the stator, a permanent magnet fixed to the stator so as to be opposed to the iron member, and a coil fixed to the stator. Because both the coil and the permanent magnet are fixed to the stator, electrical current does not have to be supplied to the movable element, and the feeder lines connected to the coil will not be broken due to the movement of the movable element. In addition, the weight of the movable element will not be increased even when the weigh of the permanent magnet is increased in order to obtain high magnetic flux density for improvement in performance. Moreover, because the movable element does not include a magnet, a magnetizing operation does not have to be applied to the movable element. The permanent magnets may be a pair in which the directions the magnetic poles thereof differ from each other, and two pairs of permanent magnets may be provided. The number of magnetic fluxes that run through the magnetic pole elements and the iron member can be increased by providing a magnetic reluctance section around the permanent magnets.

    摘要翻译： 本发明的目的是提供一种可靠性提高的线性致动器，并且性能也容易提高。 本发明提供了一种线性致动器，其包括定子，具有铁构件的可移动元件，并且能够相对于定子往复运动;固定到定子上以与铁构件相对的永磁体，以及固定到 定子。 由于线圈和永磁体均固定在定子上，所以不必向可动元件供电，并且由于可移动元件的移动而连接到线圈的馈线不会被破坏。 此外，为了提高性能，为了获得高的磁通密度，即使增加永磁体的重量，也不会增加可动元件的重量。 此外，由于可动元件不包括磁体，因此不必对可动元件施加磁化操作。 永磁体可以是磁极彼此不同的方向的一对，并且可以设置两对永磁体。 可以通过在永磁体周围设置磁阻部分来增加穿过磁极元件和铁构件的磁通量的数量。