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    METHOD FOR CONTROLLING FLATNESS DEGREE, AND DEVICE
    1.
    发明专利
    METHOD FOR CONTROLLING FLATNESS DEGREE, AND DEVICE 失效

    公开(公告)号：JP2002192213A

    公开(公告)日：2002-07-10

    申请号：JP2000390753

    申请日：2000-12-22

    Applicant: ABB AB

    Inventor： JONSSON LARS ,  MAYER CLOSE

    IPC: B21B38/02 ,  B21B37/00 ,  B21C51/00 ,  G05B13/02

    Abstract: PROBLEM TO BE SOLVED: To reduce the tolerance of a flatness degree in stripping operation. SOLUTION: This is a method which can be used to control the flatness degree of a strip 1 comprising a rolled material. In the method in which the measured value of the flatness degree of the step 1 obtained at least in one region after passing through a rolling portion 5 is used to control the flatness degree of the rolled material by comparing with the target value of a first prescribed rolling flatness degree and to generate a controlling signal of the rolling portion 5 for adjustment, the target value of the flatness degree at least in one region is made to provide a method charaderizing a further step comprising the target value of the rolling flatness degree which is made to rely on a second longitudinal direction for strip 1 which is forced to rely on the position of the longitudinal direction of the strip.

    3.
    发明专利
    未知

    公开(公告)号：SE0002125L

    公开(公告)日：2001-12-08

    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.

    5.
    发明专利
    未知

    公开(公告)号：SE9904166L

    公开(公告)日：2001-05-19

    申请号：SE9904166

    申请日：1999-11-18

    Applicant: ABB AB

    Inventor： BACKMAN MAGNUS ,  NYGREN NOLEMO JAN-ANDERS ,  KJAER PHILIP ,  BALGAARD LENNART ,  SMEDE JAN ,  LARSSON PER ,  ALBERTSSON OVE ,  JOHANSSON JAN ,  FALAH AL-HOSINI ,  JONSSON LARS

    IPC: H01H9/54

    Abstract: An electric switching device for alternating current comprises two branches ( 2, 3 ) connected in parallel in a current path and having each at least two contact members ( 4-7 ) connected in series. A semiconductor device ( 8 ) is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member ( 5 ) of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member ( 6 ) of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member ( 4, 7 ) of the switching device arranged in the temporary current path.

    9.
    发明专利
    未知

    公开(公告)号：DE60134476D1

    公开(公告)日：2008-07-31

    申请号：DE60134476

    申请日：2001-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H9/56 ,  H01H33/59 ,  H01H9/54 ,  H01H33/00

    Abstract: An apparatus for controlling an electric switching device (1) for alternating current arranged in a current path for opening the switching device and for breaking the current in the current path after occurrence of a fault current comprises members (15) adapted to detect the current in the current path and a unit (20) adapted to control the electric switching device to break the current in the current path directly after a half wave of the alternating current having a peak value below a predetermined current limit value, so that the breaking is completed through a zero-crossing of the alternating current terminating a said half wave.

    10.
    发明专利
    未知

    公开(公告)号：AT398828T

    公开(公告)日：2008-07-15

    申请号：AT01938908

    申请日：2001-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H9/56 ,  H01H33/59 ,  H01H9/54 ,  H01H33/00

    Abstract: An apparatus for controlling an electric switching device (1) for alternating current arranged in a current path for opening the switching device and for breaking the current in the current path after occurrence of a fault current comprises members (15) adapted to detect the current in the current path and a unit (20) adapted to control the electric switching device to break the current in the current path directly after a half wave of the alternating current having a peak value below a predetermined current limit value, so that the breaking is completed through a zero-crossing of the alternating current terminating a said half wave.

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