公开(公告)号：US20040138967A1

公开(公告)日：2004-07-15

申请号：US10745522

申请日：2003-12-29

申请人： Hitachi, Ltd. ,  Hitachi Engineering & Services Co., Ltd.

发明人： Hiraku Ikeda ,  Seio Kanda ,  Tooru Horie ,  Toshiyuki Ueda ,  Kenzo Semba

IPC分类号： G06F017/60

CPC分类号： G05B23/0283 ,  G06Q10/06 ,  G06Q10/06315 ,  G06Q10/087 ,  G06Q10/0875 ,  Y04S10/54 ,  Y04S10/56 ,  Y04S10/60

摘要： In a maintenance management system and a method of providing engineering support, maintenance information concerning generating plants owned by a user is provided to a maker, and the maker analyzes such items of information, and manages the information in a structure maintenance management system. The user accesses the maintenance management system through the Internet, extracts information to be obtained from databases, and implements maintenance activities or drafts a plan. Engineers of the maker register maintenance information through an intranet, and provide engineering support for the maintenance activities promoted by the user.

摘要翻译： 在维护管理系统和提供工程支援的方法中，向生产者提供与用户拥有的发电厂有关的维护信息，制造商分析这些信息，并对结构维护管理系统中的信息进行管理。 用户通过互联网访问维护管理系统，提取从数据库获取的信息，并实施维护活动或起草计划。 制造商的工程师通过内部网注册维护信息，并为用户提供的维护活动提供工程支持。

公开(公告)号：US20040164828A1

公开(公告)日：2004-08-26

申请号：US10785022

申请日：2004-02-25

申请人： HITACHI, LTD. ,  HITACHI ENGINEERING & SERVICES CO., LTD.

发明人： Ayumu Morita ,  Yasuaki Suzuki ,  Masato Yabu ,  Tooru Tanimizu ,  Yozo Shibata ,  Takashi Kadowaki

IPC分类号： H01F007/08

CPC分类号： H01H33/6662 ,  H01F7/122 ,  H01F7/1615 ,  H01F7/1623 ,  H01H51/2209

摘要： An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet. That is, since the permanent magnet is arranged in the gap surrounded by the movable iron core and the stationary iron core, the magnetic filed can be prevented from affecting upon the permanent magnet, thereby it is possible to provide an electromagnet having a long use like and a high degree of reliability with no demagnetization of a permanent magnet.

摘要翻译： 由线圈构成的电磁铁，适于在线圈的中心轴线上移动的可动铁心和设置成覆盖线圈的上下表面和外周面的静止铁芯，其特征在于， 磁铁被布置在由可动铁芯和固定铁芯围绕的间隙中，其中可动铁芯被永磁铁产生的磁场由固定铁芯吸引，从而可以解决常规 电磁体，使得永久磁铁在释放操作期间沿相反方向直接通电，从而使永久磁铁退磁。 也就是说，由于永磁体被布置在由可动铁芯和固定铁芯包围的间隙中，因此可以防止磁场对永磁体产生影响，从而可以提供长时间使用的电磁体 并且具有高可靠性而不会使永磁体退磁。

公开(公告)号：US20040217834A1

公开(公告)日：2004-11-04

申请号：US10854167

申请日：2004-05-27

申请人： Hitachi, Ltd. ,  Hitachi Engineering & Services, Co. , Ltd.

发明人： Ayumu Morita ,  Yasuaki Suzuki ,  Masato Yabu ,  Tooru Tanimizu ,  Yozo Shibata ,  Takashi Kadowaki

IPC分类号： H01F007/08

CPC分类号： H01H33/6662 ,  H01F7/122 ,  H01F7/1615 ,  H01F7/1623 ,  H01H51/2209

摘要： An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.