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428 条记录 (耗时 0.013 秒)

    Electrical control apparatus using direction of current and power flow to gate switching devices
    41.
    发明授权
    Electrical control apparatus using direction of current and power flow to gate switching devices 失效
    电流控制装置使用电流和功率流来选通开关装置

    公开(公告)号：US3619765A

    公开(公告)日：1971-11-09

    申请号：US3619765D

    申请日：1970-06-24

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： WOOD PETER

    IPC分类号： G05F1/20 ,  H01F29/04

    CPC分类号： H01F29/04 ,  G05F1/20

    摘要： Electrical control apparatus including a transformer having a winding connectable in a power circuit which includes a source of alternating potential and a load circuit. The transformer winding includes at least two tap connections which are selectively connected into the power circuit with solid-state switching devices. The solid-state switching devices are gated at a firing angle responsive to an error signal. Tap-to-tap short circuits are obviated, regardless of the type of connected load, by firing control which senses the direction of instantaneous power flow, and the direction of instantaneous current flow in the power circuit.

    摘要翻译： 电气控制装置，包括具有可连接在包括交变电位源的电源电路中的绕组的变压器和负载电路。 变压器绕组包括至少两个抽头连接，其选择性地连接到具有固态开关装置的电力电路中。 固态开关器件响应于误差信号而以点火角度门控。 通过触发瞬时功率流动方向的触发控制和电源电路中瞬时电流的方向，无论连接负载的类型如何，都可以避免点对点短路。

    Arcless load tap changing apparatus
    42.
    发明授权
    Arcless load tap changing apparatus 失效
    ARCLESS LOAD TAP CHANGING APPARATUS

    公开(公告)号：US3617862A

    公开(公告)日：1971-11-02

    申请号：US3617862D

    申请日：1969-12-31

    申请人： ALLIS CHALMERS MFG CO

    发明人： STICH FREDERICK A

    IPC分类号： H01F29/04 ,  H02P13/06 ,  G05F1/14

    CPC分类号： H01F29/04

    摘要： A load tap changing voltage regulator has a dial type tapchanging switch and an odd-even switch integral therewith having first and second pairs of contacts connected in series with first and second rotatable tap changer contacts forming first and second load circuits, and the odd-even switch contacts open before the corresponding tap changer rotatable contact disengages a stationary contact and close after it engages a succeeding stationary contact. A pair of oppositely poled thyristors are connected across the first and second load circuits. First and second current transformers are connected in the first and second load circuits and energize bridge rectifiers which supply gating current to the thyristors and also indicate whether the load circuits are open or closed. RC time delay circuits responsive to the opening of either load circuit remove the gating signals to the thyristors after a predetermined time delay, thus assuring that the tap changer switch contacts and the odd-even switch contacts do not interrupt current and that the current is commutated off by the thyristors at current zero. Shunt regulators between the bridge rectifiers and the cathode-gate circuits of the thyristors regulate the power dissipation of the gate circuits, and the shunt control elements are biased in the active region to permit gating current to flow to the thyristors when both load circuits are closed and they are biased into saturation to shunt gating current from the thyristors a predetermined interval subsequent to the opening of either of the pairs of odd-even switch contacts.

    Tapchangers for regulating transformers
    43.
    发明授权
    Tapchangers for regulating transformers 失效
    用于调整变压器的接头

    公开(公告)号：US3614597A

    公开(公告)日：1971-10-19

    申请号：US3614597D

    申请日：1969-09-24

    申请人： SMIT NIJMEGEN ELECTROTEC

    发明人： RIEMSDIJK GERARDUS A VAN

    IPC分类号： H01F29/04 ,  H01H9/00 ,  H02P13/06 ,  H01H19/58 ,  H01H21/78

    CPC分类号： H01F29/04 ,  H01H9/0005

    摘要： A tapchanger for a regulating transformer includes a rotatable combined diverter switch tap selector, of which the fixed contacts are arranged in a circular row and are mounted at equal free distances from each other and at least one fixed contact extends over a larger arc of a circle than the other contacts and in which a set of switching contacts mounted for rotation about the axis of the circular row and cooperating with the fixed contacts is adapted to be rotated, for the changeover operation between at least one pair of adjacent fixed contacts, through a greater angle than for the changeover operation between the other pairs of adjacent fixed contacts.

    Load tap changer apparatus with magnetic transducer protective circuitry
    44.
    发明授权
    Load tap changer apparatus with magnetic transducer protective circuitry 失效
    带磁性传感器保护电路的负载变压器装置

    公开(公告)号：US3602807A

    公开(公告)日：1971-08-31

    申请号：US3602807D

    申请日：1970-04-16

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： PRESCOTT HERBERT L

    IPC分类号： H01F29/04 ,  H02P13/06 ,  H02H7/00 ,  H02P13/04

    CPC分类号： H01F29/04 ,  H01H2009/0061

    摘要： Load tap changer apparatus, including a tap selector switch, a load transfer switch, and a protective circuit having a magnetic transducer which magnetically checks for current flow through a predetermined conductor of the apparatus, while being spaced from the predetermined conductor beyond the voltage jump distance to ground. The protective circuit utilizes an electrical signal from the magnetic transducer to prevent the operation of the tap selector switch when current is flowing through the predetermined conductor.