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    • 1. 发明授权
    • Apparatus for compensating reactive power by current-source type
converter
    • 用于通过电流源型转换器补偿无功功率的装置
    • US4780660A
    • 1988-10-25
    • US101021
    • 1987-09-25
    • Seiya ShimaHiromi InabeSadao Hokari
    • Seiya ShimaHiromi InabeSadao Hokari
    • G01R19/06G05F1/70
    • G01R19/06
    • A first apparatus for determining instantaneous reactive currents to determine instantaneous reactive currents in every phase of a three-phase load. Three phase current signals corresponding, respectively, to phase currents of the three-phase load supplied from a three-phase power-supply source are multiplied with sinusoidal wave signals of three phases, each of which has a phase difference of 90.degree. relative to the corresponding phase voltage of the three-phase power supply source to obtain the products for three phase, respectively, which products are added together to produce a sum signal. The instantaneous reactive currents mentioned above are determined on the basis of the sum signal and the three phase sinusoidal wave signals. A second apparatus for compensating the reactive power of the three-phase load by means of a converter load circuit including a current-source type three phase converter connected in parallel with the three-phase load by making use of the instantaneous reactive currents of the three-phase load determined by the first mentioned apparatus.
    • 用于确定瞬时无功​​电流以确定三相负载的每个相中的瞬时无功电流的第一装置。 分别对应于从三相电源供给的三相负载的相电流的三相电流信号与三相正弦波信号相乘,每相具有相对于相位差为90度的相位差 三相电源的对应相电压分别获得三相产品,将这些产品相加在一起产生和信号。 上述瞬时无功电流基于和信号和三相正弦波信号来确定。 一种用于通过转换器负载电路来补偿三相负载的无功功率的第二装置,所述转换器负载电路包括利用三相负载的瞬时无功电流与三相负载并联连接的电流源型三相转换器 由第一个提到的设备确定的相位负载。
    • 7. 发明授权
    • Current transducer arrangement
    • 电流传感器布置
    • US4007414A
    • 1977-02-08
    • US594252
    • 1975-07-09
    • Seiya ShimaKorefumi Tashiro
    • Seiya ShimaKorefumi Tashiro
    • H01F38/40G01R15/18G01R19/14G01R19/20G01R19/00
    • G01R15/185G01R19/14G01R19/20
    • A current transducer arrangement for detecting the magnitude and the polarity of a large current, wherein at least three current transducers and a majority circuit are comprised, each of the current transducers including a primary winding, a saturable core, a secondary winding magnetically coupled with the primary winding through the saturable core, a resistor, and having an alternating voltage supplied to the secondary winding, wherein the primary windings of the current transducers are connected in series, the large current flowing through the series-connected primary windings, wherein the alternating voltages to be supplied to the secondary windings of the current transducers are respectively different in phase, and wherein the majority circuit provides an output voltage proportional to an output voltage value occupying the greatest number of the current transducers. The current transducer arrangement can detect a D.C. current of a transmission system or an A.C. current containing a D.C. component in electrical isolation therefrom in a response time in the order of microseconds.
    • 一种用于检测大电流的大小和极性的电流传感器装置,其中包括至少三个电流换能器和多数电路,每个电流换能器包括初级绕组,可饱和芯,与 通过可饱和芯初级绕组,电阻器,并且具有提供给次级绕组的交流电压,其中电流传感器的初级绕组串联连接,流过串联连接的初级绕组的大电流,其中交流电压 被提供给电流换能器的次级绕组的相位分别不同,并且其中多数电路提供与占据最大数量的电流换能器的输出电压值成比例的输出电压。 电流传感器布置可以在微秒级的响应时间内检测传输系统的直流电流或包含与其隔离的直流分量的交流电流。