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11 条记录 (耗时 0.011 秒)

    ELECTRIC SWITCHING DEVICE
    1.
    发明授权
    ELECTRIC SWITCHING DEVICE 失效
    接线装置

    公开(公告)号：EP0901684B1

    公开(公告)日：2001-12-19

    申请号：EP97924457.1

    申请日：1997-05-26

    申请人： ABB AB

    发明人： LÖNNERMO, Thomas ,  NYGREN, Jan-Anders ,  VALDEMARSSON, Stefan

    IPC分类号： H01H31/00 ,  H01H79/00

    CPC分类号： H01H79/00 ,  H01H1/42

    摘要： An electric switching device for fast closing of a high current comprises one movable contact element (4) and one fixed contact element (5), which form a sliding contact. A spring member (2) operates the first contact element (4). During the closing movement, the first contact element completes an acceleration phase (t1), during which the spring force stored by clamping in the spring member (2) is transformed into kinetic energy of the movable contact element. Then follows a movement phase (t2-t1), during which the movable contact element moves towards the closed position at constant speed. The spring member (2) comprises a freely journalled torsion-spring rod, one end of which is fixed to an operating arm (3) which is freely rotatable between a first support (7) and a second support (8). The contact element (4) is fixed to the second end of the torsion-spring rod, the torsion-spring rod being clamped by rotating the contact element in the opening direction with the operating arm against the first support. The fixed contact element (5) comprises a plurality of contact fingers (14) as well as a plurality of spring fingers (17). The contact fingers are made of a first electrically conducting material with good electrical conductivity. The spring fingers (17) are made of a second conducting material with a high yield point and designed so as to have an essentially higher resonance frequency than the contact fingers. The spring fingers are adapted to rapidly resume a contact position after a deflection excited transversely of the closing direction.

    SYNCHRONOUS MACHINE
    3.
    发明公开
    SYNCHRONOUS MACHINE 失效
    同步机器

    公开(公告)号：EP1016179A1

    公开(公告)日：2000-07-05

    申请号：EP98902371.8

    申请日：1998-02-02

    申请人： ABB AB

    发明人： BERGGREN, Bertil ,  GERTMAR, Lars ,  NYGREN, Jan-Anders ,  PETERSSON, Tore ,  LEIJON, Mats

    IPC分类号： H02H7/06

    CPC分类号： H02P9/305 ,  H02H7/06 ,  Y10S174/19 ,  Y10S174/29

    摘要： A synchronous machine for power and/or voltage control comprises a stator with a stator winding and a rotor with a field winding. The stator winding comprises a high-voltage cable with solid insulation. A rotor has a thermally based rotor current limit intersecting with a thermally based stator current limit in a capability graph at a power factor considerably below the rated power factor or has the thermally based rotor current limit above the thermally based stator current limit in the capability graph. Means are provided for limiting the currents in order to avoid thermal damage. In a method for power and/or voltage control of such a synchronous machine, the machine operates with the stator current exceeding the thermally based stator current limit for a certain time period less than the maximum permissible time limit, whereafter the overload is reduced by reduction of either the active power or the field current or a combination of both.

    摘要翻译： 用于功率和/或电压控制的同步电机包括具有定子绕组的定子和具有励磁绕组的转子。 定子绕组包括具有固体绝缘的高压电缆。 转子具有基于热量的转子电流极限与功率因数下的基于热量的定子电流极限在功率因数下相交，该功率因数大大低于额定功率因数或具有基于热量的转子电流极限高于能力图中基于热量的定子电流极限 。 提供了限制电流的手段，以避免热损伤。 在用于这种同步电机的功率和/或电压控制的方法中，机器以超过基于热量的定子电流极限的定子电流工作一段时间，该时间小于最大允许时间限制，然后过载通过减少 有功功率或励磁电流或两者的组合。

    SERIES COMPENSATION OF ELECTRIC ALTERNATING CURRENT MACHINES
    4.
    发明公开
    SERIES COMPENSATION OF ELECTRIC ALTERNATING CURRENT MACHINES 失效
    AC动力机械串联补偿

    公开(公告)号：EP1012945A1

    公开(公告)日：2000-06-28

    申请号：EP98902359.3

    申请日：1998-02-02

    申请人： ABB AB

    发明人： LEIJON, Mats ,  GERTMAR, Lars ,  NYGREN, Jan-Anders ,  TEMPLIN, Peter

    IPC分类号： H02J3/18 ,  H02K11/00 ,  H02K3/30 ,  H02K3/40

    CPC分类号： H02J3/1807 ,  H02K2203/15 ,  Y02E40/30 ,  Y10S174/15

    摘要： In a method of series compensating rotating electric alternating current machines (2) connected, directly or via a static current converter (28), to a three-phase distribution or transmission network (6), wherein the stator winding of the alternating current machine is Y-connected, a capacitive circuit (14) for the fundamental frequency of the voltage is connected in each phase between the down side of the winding and the earth point (20) of the distribution or transmission network (6). A device for such series compensation comprises a capacitive circuit (14) for the fundamental frequency of the voltage, connected between the down side of the winding and the earth point (20) of the distribution or transmission network (6).

    ELECTRIC SWITCHING DEVICE
    10.
    发明授权
    ELECTRIC SWITCHING DEVICE 失效
    电气接线装置

    公开(公告)号：EP0902955B1

    公开(公告)日：2003-02-26

    申请号：EP97924458.9

    申请日：1997-05-26

    申请人： ABB AB

    发明人： LÖNNERMO, Thomas ,  NYGREN, Jan-Anders ,  VALDEMARSSON, Stefan

    IPC分类号： H01H1/42

    CPC分类号： H01H79/00 ,  H01H1/42

    摘要： An electric switching device for fast closing of a high current comprises one movable contact element (4) and one fixed contact element (5), which form a sliding contact. A spring member (2) operates the first contact element (4). During the closing movement, the first contact element completes an acceleration phase (t1), during which the spring force stored in the spring member (2) by clamping is transformed into kinetic energy of the movable contact element. Then follows a movement phase (t2-t1), during which the movable contact element moves towards the closed position at constant speed. The spring member (2) comprises a freely journalled torsion-spring rod, one end of which is fixed to an operating arm (3) which is freely rotatable between a first support (7) and a second support (8). The contact element (4) is fixed to the second end of the torsion-spring rod, the torsion-spring rod being clamped by rotating the contact element in the opening direction with the operating arm against the first support. The fixed contact element (5) comprises a plurality of contact fingers (14) as well as a plurality of spring fingers (17). The contact fingers are made of a first electrically conducting material with good electrical conductivity. The spring fingers (17) are made of a second conducting material with a high yield point and designed so as to have an essentially higher resonance frequency than the contact fingers. The spring fingers are adapted to rapidly resume a contact position after a deflection excited transversely of the closing direction.