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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
    • Abnormal elevator speed detector
    • 电梯速度检测器异常
    • US4378059A
    • 1983-03-29
    • US255103
    • 1981-04-17
    • Takanobu HatakeyamaYasunori KatayamaSadao HokariKanji YonedaTomiaki KuriharaToshio Meguro
    • Takanobu HatakeyamaYasunori KatayamaSadao HokariKanji YonedaTomiaki KuriharaToshio Meguro
    • B66B1/46B66B5/06
    • B66B5/06
    • An abnormal speed detector for an elevator system having an elevator car for servicing a plurality of floors, means for driving the elevator car in response to a speed command and a speed detector for detecting a running speed of the elevator car is disclosed. The abnormal speed detector comprises means for storing a set of speed data indicating a predetermined abnormal speed checking pattern as a function of running time or running distance of the elevator car, means for reading out of the storage means one of the set of speed data corresponding to an instant value of the running time or running position of the elevator car after the start of run, and means for comparing an actual speed of the elevator car with the readout speed data to determine if the speed of the elevator car is normal or not.
    • 公开了一种用于具有用于维修多个楼层的电梯轿厢的电梯系统的异常速度检测器,用于响应于速度指令驱动电梯轿厢的装置和用于检测电梯轿厢的行驶速度的速度检测器。 异常速度检测器包括用于存储指示作为电梯轿厢的行驶时间或行驶距离的函数的预定异常速度检查模式的一组速度数据的装置,用于从存储装置读出对应的一组速度数据中的一个 到运行开始后的电梯轿厢的运行时间或运行位置的即时值,以及用于将电梯轿厢的实际速度与读出速度数据进行比较的装置,以确定电梯轿厢的速度是否正常 。