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    Gating control for a static switching arrangement with improved conduction angle balancing means
    5.
    发明授权
    Gating control for a static switching arrangement with improved conduction angle balancing means 失效
    具有改进的导通角平衡平衡的静态切换装置的控制

    公开(公告)号：US3693069A

    公开(公告)日：1972-09-19

    申请号：US3693069D

    申请日：1971-11-09

    Applicant: GEN ELECTRIC

    Inventor： KELLEY FRED W JR ,  LEZAN GEORGES R E

    IPC: G05F1/445 ,  G05F1/455 ,  G05F1/44

    CPC classification number: G05F1/455 ,  G05F1/445

    Abstract: A gating control for a switching arrangement comprising a pair of thyristors which are alternately gated into conduction by gating pulses for predetermined conduction angles. First balancing means compares the conduction angles of alternate thyristors on those pairs of successive conducting periods during which a first one of the thyristors conducts preceding a second one of the thyristors and derives a first-balance indicating signal indicative of the difference between the conduction angles compared by the first balancing means. Second balancing means compares the conduction angles of alternate thyristors on those pairs of successive conducting periods during which the second thyristor conducts preceding said first thyristor and derives a second balance-indicating signal indicative of the difference between the conduction angles compared by this second balancing means. For forcing the conduction angles of the alternate thyristors toward equality, means sensitive to the first balanceindicating signal varies the gating angles at which gating pulses are delivered to the first thyristor; and means sensitive to the second balance-indicating signal varies the gating angles at which gating pulses are delivered to the second thyristor.

    Thyristor state sensor
    6.
    发明授权
    Thyristor state sensor 失效
    THYRISTOR州传感器

    公开(公告)号：US3654541A

    公开(公告)日：1972-04-04

    申请号：US3654541D

    申请日：1969-06-26

    Applicant: GEN ELECTRIC

    Inventor： KELLEY FRED W JR ,  LEZAN GEORGES R E

    IPC: G05F1/10 ,  H02H7/122 ,  H02M1/18 ,  H02P1/22

    CPC classification number: H02H7/1225

    Abstract: To sense when a thyristor is conducting, voltage detecting means is connected in parallel with the thyristor for emitting an indicating signal whenever the instantaneous magnitude of voltage across the thyristor exceeds a predetermined threshold level which is higher than the voltage drop across the thyristor when conducting, and logic means is provided for producing a predetermined output signal in response to the absence of said indicating signal and, concurrently, the act of either triggering the thyristor or producing the output signal.

    Abstract translation: 为了检测晶闸管何时导通，只要晶闸管两端的电压的瞬时幅值超过比导通时晶闸管两端的电压降高的预定阈值电平时，电压检测装置与晶闸管并联连接，用于发出指示信号， 并且提供逻辑装置以响应于不存在所述指示信号而产生预定的输出信号，并且同时提供触发晶闸管或产生输出信号的动作。

    Phase-controlled static switch for a power circuit having a variable power factor
    8.
    发明授权
    Phase-controlled static switch for a power circuit having a variable power factor 失效
    具有可变功率因数的电源电路的相位控制静态开关

    公开(公告)号：US3665293A

    公开(公告)日：1972-05-23

    申请号：US3665293D

    申请日：1971-03-03

    Applicant: GEN ELECTRIC

    Inventor： KEILER YOEL ,  KELLEY FRED W JR ,  LEZAN GEORGES R E

    IPC: G05F1/445 ,  G05F1/455 ,  H02M1/08 ,  G05F1/56

    CPC classification number: G05F1/455 ,  G05F1/445 ,  H02M1/081

    Abstract: A gating control for an a-c phase-controlled, single-phase static switch comprising a pair of thyristors connected in inverse parallel relationship in a power circuit that has a variable power factor. The gating control controls the length of the non-conducting period between successive conduction periods of the switch in such a manner that the length of the nonconducting period is made approximately inversely proportional to an input control signal for the gating control, when the input control signal is between 0 and 1 per unit. A conduction-angle balancing circuit modifies the action of the gating control in such a manner that the conduction angles are forced toward a condition of equality despite a change therein produced by a change in the effective input control signal and despite the power circuit''s having a low power factor.

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