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    A METHOD AND DEVICE FOR CONTROLLING STIRRING IN A STRAND
    1.
    发明申请
    A METHOD AND DEVICE FOR CONTROLLING STIRRING IN A STRAND 审中-公开
    一种控制杆中搅拌的方法和装置

    公开(公告)号：WO0202831A3

    公开(公告)日：2002-06-20

    申请号：PCT/SE0101531

    申请日：2001-07-04

    Applicant: ABB AB ,  LEHMAN ANDERS ,  LARSSON PER

    Inventor： LEHMAN ANDERS ,  LARSSON PER

    IPC: B22D11/115

    CPC classification number: B22D11/115

    Abstract: A method of controlling the flow of molten metal in non-solidified portions of a strand (3) during continuous casting, and a device for application of the method. The device comprises a two-phase or plural-phase stirrer (1) arranged around a mould (6) that is open in opposite ends and that surrounds the strand (3), said stirrer (1) being arranged to generate a moving magnetic field in the melt, and at least one magnetic flow-conducting body (15) being placed between an inner periphery of said stirrer (1) and the outer periphery of the mould (6). In the case of open casting, the magnetic flow-conducting body (15) is positioned in a first position in which it displaces at least a part of the magnetic flow generated by the stirrer (1) in a direction towards the meniscus (17) of the strand (3), and, in the case of closed casting, the magnetic flow-conducting body (15) is positioned in a second position in which it displaces at least a part of the magnetic flow generated by the stirrer (1) away from the meniscus (17) of the strand (3).

    Abstract translation: 一种在连续铸造期间控制铸坯（3）的非凝固部分中的熔融金属流动的方法，以及该方法的应用装置。 该装置包括布置在模具（6）周围的两相或多相搅拌器（1），所述模具（6）在相反两端开口并且围绕所述绞合线（3），所述搅拌器（1）布置成产生移动磁场 并且在所述搅拌器（1）的内周边和所述模具（6）的外周边之间放置至少一个磁导流体（15）。 在开放式铸造的情况下，磁性导流体（15）定位在第一位置，在该第一位置中，其将由搅拌器（1）产生的磁流的至少一部分沿朝向弯月面（17）的方向移位， （3）的磁流的至少一部分，并且在封闭浇铸的情况下，磁导流体（15）定位在第二位置，在该第二位置中，其将由搅拌器（1）产生的磁流的至少一部分移位， 远离线（3）的弯月面（17）。

    2.
    发明专利
    未知

    公开(公告)号：AT518235T

    公开(公告)日：2011-08-15

    申请号：AT01938906

    申请日：2001-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H9/56 ,  H01H33/59 ,  H01H33/00

    Abstract: An apparatus ( 14 ) for detecting a zero-crossing of an alternating current after occurrence of a fault in a current path ( 2 ) for determining a suitable time for opening an electric switching device ( 2 ) arranged in the current path for breaking the current in the current path comprises members ( 15 ) adapted to detect the current in the current path. An arrangement ( 19 ) is adapted to calculate the dc-level of the current and the decay of the dc-level with time on the basis of values of the alternating current detected and also predict the time for a future zero-crossing of the alternating current on the basis of at least current values obtained through said current detection, the dc-level calculated, the dc-decay calculated and information about the period time of the alternating current.

    7.
    发明专利
    未知

    公开(公告)号：SE516437C2

    公开(公告)日：2002-01-15

    申请号：SE0002125

    申请日：2000-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H33/59 ,  H01H9/56 ,  H01H33/00

    Abstract: An apparatus ( 14 ) for detecting a zero-crossing of an alternating current after occurrence of a fault in a current path ( 2 ) for determining a suitable time for opening an electric switching device ( 2 ) arranged in the current path for breaking the current in the current path comprises members ( 15 ) adapted to detect the current in the current path. An arrangement ( 19 ) is adapted to calculate the dc-level of the current and the decay of the dc-level with time on the basis of values of the alternating current detected and also predict the time for a future zero-crossing of the alternating current on the basis of at least current values obtained through said current detection, the dc-level calculated, the dc-decay calculated and information about the period time of the alternating current.

    8.
    发明专利
    未知

    公开(公告)号：SE0002530L

    公开(公告)日：2002-01-06

    申请号：SE0002530

    申请日：2000-07-05

    Applicant: ABB AB

    Inventor： LARSSON PER ,  LEHMAN ANDERS

    IPC: B22D11/115

    Abstract: A method of controlling the flow of molten metal in non-solidified portions of a strand (3) during continuous casting, and a device for application of the method. The device comprises a two-phase or plural-phase stirrer (1) arranged around a mould (6) that is open in opposite ends and that surrounds the strand (3), said stirrer (1) being arranged to generate a moving magnetic field in the melt, and at least one magnetic flow-conducting body (15) being placed between an inner periphery of said stirrer (1) and the outer periphery of the mould (6). In the case of open casting, the magnetic flow-conducting body (15) is positioned in a first position in which it displaces at least a part of the magnetic flow generated by the stirrer (1) in a direction towards the meniscus (17) of the strand (3), and, in the case of closed casting, the magnetic flow-conducting body (15) is positioned in a second position in which it displaces at least a part of the magnetic flow generated by the stirrer (1) away from the meniscus (17) of the strand (3).

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