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23 条记录 (耗时 0.009 秒)

    Induction watthour meter for power systems transmitting carrier communication signals
    3.
    发明授权
    Induction watthour meter for power systems transmitting carrier communication signals 失效
    用于电力系统的感应电度表传输载波通信信号

    公开(公告)号：US3925728A

    公开(公告)日：1975-12-09

    申请号：US44458374

    申请日：1974-02-21

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： WHYTE IAN A

    IPC分类号： G01R11/36 ,  G01R11/42 ,  H04B3/54 ,  G01R7/00 ,  G01R11/32

    CPC分类号： H04B3/54 ,  G01R11/36 ,  G01R11/42 ,  H04B2203/5466 ,  Y10T307/773

    摘要： Magnetic sections of an induction watthour meter include metering coils for connection as elements of a terminating impedance network for power line carrier communication signals. Stator cores of the magnetic sections are made of a ferrite magnetic material so that the metering coils can have predetermined high frequency resonant circuit characteristics. The terminating impedance networks are integral to the watthour metering circuit to provide high impedances for terminating the communication signal to reduce undesired effects on the signals due to low impedance customer electric loads and wide variations in the loads. An alternative embodiment includes a terminating impedance network connected in a watthour metering circuit in which a low impedance circuit protects against interfering high frequency signals originating at a customer''s premises.

    摘要翻译： 感应电度表的磁性部分包括用于连接作为用于电力线载波通信信号的终端阻抗网络的元件的计量线圈。 磁性部分的定子芯由铁氧体磁性材料制成，使得计量线圈可以具有预定的高频谐振电路特性。 终端阻抗网络与瓦特计量电路是一体的，以提供用于终止通信信号的高阻抗，以减少由于低阻抗客户电负载以及负载的大幅变化对信号的不期望的影响。 一个替代实施例包括连接在瓦特计量电路中的终端阻抗网络，其中低阻抗电路保护免受干扰来自客户​​房屋的高频信号。

    Donald j
    6.
    再颁专利
    Donald j 失效

    公开(公告)号：USRE15370E

    公开(公告)日：1922-06-06

    申请号：US15370D

    IPC分类号： G01R11/42

    CPC分类号： G01R11/42

    Current sensor and method using differentially generated feedback
    7.
    发明授权
    Current sensor and method using differentially generated feedback 失效
    电流传感器和使用差分反馈的方法

    公开(公告)号：US5568047A

    公开(公告)日：1996-10-22

    申请号：US288177

    申请日：1994-08-10

    申请人： Daniel A. Staver ,  Juha M. Hakkarainen

    发明人： Daniel A. Staver ,  Juha M. Hakkarainen

    IPC分类号： G01R15/18 ,  G01R11/02 ,  G01R11/42 ,  G01R15/04 ,  G01R19/00 ,  G01R33/00 ,  G05F1/10 ,  H01F38/32 ,  H03F3/45

    CPC分类号： H01F38/32

    摘要： A current sensor has one signal interface channel including a transformer having a primary winding, a secondary winding and a feedback winding. A magnetic core magnetically couples the primary winding, the secondary winding and the feedback winding. The current sensor further includes a feedback generating circuit responsive to an AC signal in the secondary winding for generating a feedback signal having a continuous polarity supplied to the feedback winding. The feedback signal being effective for maintaining a flux in the magnetic core substantially near zero. The feedback generating circuit is made up of an operational amplifier, such as an amplifier having first and second differential input ports and first and second differential output ports, and a switching assembly designed to generate a compensating AC signal from a DC offset voltage. The compensating AC signal is conveniently coupled to the operational amplifier through the magnetic core.

    摘要翻译： 电流传感器具有一个信号接口通道，其包括具有初级绕组，次级绕组和反馈绕组的变压器。 磁芯磁耦合初级绕组，次级绕组和反馈绕组。 电流传感器还包括响应于次级绕组中的AC信号的反馈产生电路，用于产生具有提供给反馈绕组的连续极性的反馈信号。 反馈信号对于将磁芯中的磁通保持基本上接近零是有效的。 反馈产生电路由诸如具有第一和第二差分输入端口的放大器和第一和第二差分输出端口的运算放大器组成，以及设计成从DC偏移电压产生补偿AC信号的开关组件。 补偿AC信号通过磁芯方便地耦合到运算放大器。