Synchronous machine with power and voltage control
    3.
    发明授权
    Synchronous machine with power and voltage control 失效
    同步电机具有电源和电压控制

    公开(公告)号:US06828701B1

    公开(公告)日:2004-12-07

    申请号:US09355728

    申请日:1999-10-04

    IPC分类号: H02H706

    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 maxim an 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: 用于电力和/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。 转子具有与基于热定子电流限制相交的热基转子电流极限,功率曲线的功率因数明显低于额定功率因数,或具有高于热定子电流极限的基于热的转子电流限制。 在能力图中。 提供了用于限制电流以避免热损伤的装置。 在这种同步电机的功率和/或电压控制方法中,机器以超过热定子电流限制的定子电流工作一段时间,小于允许时间限制的最大值,之后过载被减少 降低有功功率或励磁电流或二者的组合。

    Electric switching device
    5.
    发明授权
    Electric switching device 失效
    电动开关装置

    公开(公告)号:US06518865B1

    公开(公告)日:2003-02-11

    申请号:US09959667

    申请日:2002-02-26

    IPC分类号: H01H5300

    CPC分类号: H01H33/285 H01H79/00

    摘要: An electric switching device for fast closing of a high current in a power network comprising a first electrode (1), a second electrode (2), a movable contact element (3) closing said first and second electrodes, and an operating device. The operating device comprises a helically wound first coil (6) secured to the first electrode. The movable contact element comprises a flange (4) making contact with the coil. A current pulse flowing through the coil forms a repulsive force between the coil and the flange, said repulsive force throwing the movable contact element to the second electrode and completing the closing operation.

    摘要翻译: 一种用于在电力网络中快速关闭高电流的电开关装置,包括第一电极(1),第二电极(2),闭合所述第一和第二电极的可动触头元件(3)和操作装置。 操作装置包括固定到第一电极的螺旋缠绕的第一线圈(6)。 可动接触元件包括与线圈接触的凸缘(4)。 流过线圈的电流脉冲在线圈和法兰之间形成排斥力,所述斥力将可动接触元件投射到第二电极并完成闭合操作。

    Series compensation of electric alternating current machines
    6.
    发明授权
    Series compensation of electric alternating current machines 失效
    电动交流电机系列补偿

    公开(公告)号:US06465979B1

    公开(公告)日:2002-10-15

    申请号:US09355852

    申请日:1999-10-04

    IPC分类号: H02J318

    摘要: A method and device for providing series compensation for rotating electric alternating current machines connected either directly, or via a static current converter, to a three-phase distribution or transmission network. The stator of the electric machine is Y-connected. A capacitive circuit for the fundamental frequency of the voltage is connected to each phase between the low voltage side of the winding and a ground of the transmission network.

    摘要翻译: 一种用于直接或经由静态电流转换器连接到三相分配或传输网络的旋转电动交流电机的串联补偿的方法和装置。 电机的定子是Y连接的。 用于电压基频的电容电路连接到绕组的低压侧和传输网络的地之间的每相。