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24 条记录 (耗时 0.013 秒)

    Means for proximal end measurement of AC voltage across distal end cable load
    4.
    发明授权
    Means for proximal end measurement of AC voltage across distal end cable load 失效
    用于远端电缆负载近端测量交流电压的方法

    公开(公告)号：US4835462A

    公开(公告)日：1989-05-30

    申请号：US160498

    申请日：1988-02-01

    申请人： William L. Konrad

    发明人： William L. Konrad

    IPC分类号： G01R19/06 ,  G01R19/22

    CPC分类号： G01R19/22 ,  G01R19/06

    摘要： A voltage measuring device for accurately sensing the AC load voltage at remote, distal end of a long, two-conductor cable, the measuring device comprising a parallel arrangement of an AC source and a DC voltmeter, located at the proximal, source end of the cable, and an AC load in parallel with a passive, DC producing module at the distal, load end of the cable, the passive module further comprising a passive, DC producing voltage divider, the output of which is proportional to the AC load voltage drop.

    摘要翻译： 一种电压测量装置，用于精确地感测长双芯电缆的远端远端的交流负载电压，所述测量装置包括AC源和DC电压表的并联装置，所述AC电源和DC电压表位于 电缆，以及在电缆的远端负载端处与被动DC产生模块并联的AC负载，所述无源模块还包括无源DC产生分压器，其输出与AC负载电压成比例 下降。

    Method and circuit arrangement for measuring in-phase and quadrature components of current in an electrical alternating current power supply
    5.
    发明授权
    Method and circuit arrangement for measuring in-phase and quadrature components of current in an electrical alternating current power supply 失效
    用于测量电力交流电源中电流的同相和正交分量的方法和电路装置

    公开(公告)号：US4814696A

    公开(公告)日：1989-03-21

    申请号：US892349

    申请日：1986-08-01

    申请人： Siegfried Kern ,  Otmar Glaser

    发明人： Siegfried Kern ,  Otmar Glaser

    IPC分类号： G01R19/06 ,  G01R21/00 ,  G01R19/00

    CPC分类号： G01R19/06 ,  G01R21/001

    摘要： A method and circuit arrangement for measuring in-phase current and quadrature current in an electrical alternating current power supply is disclosed. The invention uses a microprocessor whereby four integral values A.sub.1 through A.sub.4 are combined in such as to allow determination of the in-phase current and the quadrature current. The invention is useful in recording in-phase and quadrature components of current from an alternating current power supply.

    摘要翻译： 公开了用于测量交流电源中的同相电流和正交电流的方法和电路装置。 本发明使用微处理器，其中组合四个积分值A1至A4，以允许确定同相电流和正交电流。 本发明可用于记录来自交流电源的电流的同相和正交分量。

    Apparatus for determining active and/or reactive current and/or the power thereof in an inverter with a given input d-c voltage, especially in a pulsed inverter
    6.
    发明授权
    Apparatus for determining active and/or reactive current and/or the power thereof in an inverter with a given input d-c voltage, especially in a pulsed inverter 失效
    用于确定具有给定输入d-c电压的逆变器中的有功和/或无功电流和/或其功率的装置，特别是在脉冲逆变器

    公开(公告)号：US4609983A

    公开(公告)日：1986-09-02

    申请号：US729978

    申请日：1985-05-02

    申请人： Michael Braun

    发明人： Michael Braun

    IPC分类号： G01R21/06 ,  G01R19/06 ,  G01R21/00 ,  H02H7/122

    CPC分类号： G01R21/001 ,  G01R19/06

    摘要： In an inverter, the phase, frequency and amplitude of the output voltage are determined by the switching signals for the inverter switches. By means of the switches which can be actuated by the same switching signals, the measured values corresponding to the phase currents are pulse width-modulated. The instantaneous values of the phase power formed thereby are optionally added to form the total active power sum. A characteristic stage can weight the sum signal with the reciprocal value of the voltage drive of the inverter, so that a signal is produced which is proportional to the active current. In a similar manner, also the reactive current can be determined by means of switches if the phase of the measured phase currents is shifted by .pi./2.

    摘要翻译： 在逆变器中，输出电压的相位，频率和幅度由逆变器开关的开关信号决定。 通过可由相同开关信号驱动的开关，对应于相电流的测量值被脉冲宽度调制。 由此形成的相位功率的瞬时值可选地被加入以形成总有功功率和。 特征级可以使用逆变器的电压驱动的倒数加权和信号，从而产生与有功电流成正比的信号。 以类似的方式，如果所测量的相电流的相位偏移pi / 2，则可以通过开关来确定无功电流。

    Method and Apparatus for Computing Metric Values for Loudspeaker Protection
    7.
    发明申请
    Method and Apparatus for Computing Metric Values for Loudspeaker Protection 有权
    用于计算扬声器保护度量值的方法和装置

    公开(公告)号：US20140086418A1

    公开(公告)日：2014-03-27

    申请号：US13654671

    申请日：2012-10-18

    申请人： DIALOG SEMICONDUCTOR B.V.

    发明人： Wessel Lubberhuizen ,  Marinus Wilhelmus Kruiskamp

    IPC分类号： H03G11/00

    CPC分类号： H04R9/022 ,  G01R1/00 ,  G01R19/00 ,  G01R19/06 ,  G01R19/165 ,  G01R19/16528 ,  H03F1/52 ,  H04R3/007 ,  H04R29/001 ,  H04R29/003

    摘要： Systems and methods thereof for obtaining metrics and an accurate threshold to prevent loudspeaker overheating, based on autocorrelation and cross-correlation of band-pass filtered current and voltage measurements are disclosed. The methods invented are based on instantaneous voltage and current measurements. The invention does not require a DC or pilot signal to be added to the audio signal in order to do perform the measurement, and it is not disturbed by capacitive or inductive components in the complex impedance of the voice coil.

    摘要翻译： 公开了基于带通滤波电流和电压测量的自相关和互相关以获得度量的准确阈值以及防止扬声器过热的系统及其方法。 所发明的方法基于瞬时电压和电流测量。 本发明不需要将DC或导频信号添加到音频信号中，以便执行测量，并且其不会被音圈的复阻抗中的电容或电感分量干扰。

    Methods and Apparatuses for Determining Charging Current in Electrical Power Systems
    9.
    发明申请
    Methods and Apparatuses for Determining Charging Current in Electrical Power Systems 审中-公开
    确定电力系统充电电流的方法和装置

    公开(公告)号：US20100213952A1

    公开(公告)日：2010-08-26

    申请号：US12710013

    申请日：2010-02-22

    申请人： Anthony Locker

    发明人： Anthony Locker

    IPC分类号： G01R27/26

    CPC分类号： G01R29/16 ,  G01R19/06

    摘要： A method and apparatus are disclosed for determining a system charging current in an electrical power system having three phases, a ground, a neutral, and a neutral resistor electrically coupling the neutral to the ground. The method comprises: measuring a line voltage of each phase; measuring a line-to-neutral voltage of each phase; determining a charging capacitance of each phase based on the line voltage of each phase, the line-to-neutral voltage of each phase, a frequency of the electrical power system, and a value of the neutral resistor; determining a phase charging current for each phase of the electrical power system based on the charging capacitance of each phase, the line voltage of each phase, and the frequency of the electrical power system; and determining the system charging current based on the phase charging current for each phase.

    摘要翻译： 公开了一种用于确定具有三相的电力系统中的系统充电电流的方法和装置，地面，中性线和中性电阻器将中性线路电耦合到地面。 该方法包括：测量每相的线路电压; 测量每相的线对中性电压; 根据各相的线路电压，各相的线间电压，电力系统的频率和中性电阻的值，确定各相的充电电容; 基于各相的充电电容，各相的线路电压以及电力系统的频率，确定电力系统的各相的相位充电电流; 并且基于每相的相位充电电流来确定系统充电电流。

    Apparatus for compensating reactive power by current-source type converter
    10.
    发明授权
    Apparatus for compensating reactive power by current-source type converter 失效
    用于通过电流源型转换器补偿无功功率的装置

    公开(公告)号：US4780660A

    公开(公告)日：1988-10-25

    申请号：US101021

    申请日：1987-09-25

    申请人： Seiya Shima ,  Hiromi Inabe ,  Sadao Hokari

    发明人： Seiya Shima ,  Hiromi Inabe ,  Sadao Hokari

    IPC分类号： G01R19/06 ,  G05F1/70

    CPC分类号： G01R19/06

    摘要： 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.

    摘要翻译： 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。