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公开(公告)号：US5177433A
公开(公告)日：1993-01-05
申请号：US643787
申请日：1991-01-18
CPC分类号： H01F38/30 , G01R11/06 , G01R15/185
摘要： The current transformer of an electronic house-service meter has a ferromagnetic core which, except for an air gap, is closed. A measuring coil is inserted in the air gap and is fastened, and dimensioned so that it lies within the cross sectional area of the core.
摘要翻译： 电子家用电表的电流互感器具有铁磁芯，除了气隙外，它还是封闭的。 测量线圈插入气隙中并被紧固，并且尺寸使其位于芯的横截面积内。
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公开(公告)号：US4454471A
公开(公告)日：1984-06-12
申请号：US321273
申请日：1981-11-13
CPC分类号： H03H11/16 , G01R21/003
摘要： An electronic arrangement for determination of reactive power, including two transducers delivering at their outputs measuring voltages proportional to supply current and supply voltage. An additional phase shift of 90.degree. between the two measuring voltages is produced by phase-shifting elements. A signal proportional to reactive power is produced in a following multiplier element. To preclude as far as possible variation of amplitude and phase shift occurring on frequency fluctuation in a frequency range close to rated frequency of the power supply, an all-pass is connected as a phase-shifting element ahead of each of the two respective inputs of the multiplier element whereby one all-pass is designed to produce a phase shift of +45.degree. and the other all-pass is designed to produce a phase shift of -45.degree. at the rated frequency of the power supply.
摘要翻译： 用于确定无功功率的电子装置，包括两个换能器在其输出端输出测量与电源电流和电源电压成比例的电压。 通过相移元件产生两个测量电压之间的90°的附加相移。 在随后的乘法器元件中产生与无功功率成比例的信号。 为了排除在接近电源的额定频率的频率范围内的频率波动上发生的振幅和相移的变化，全通路作为相移元件连接在两个相应的输入端 一个全通的乘法器元件设计为产生+45°的相移，而另一个通过被设计为在电源的额定频率下产生-45°的相移。
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公开(公告)号：US3953795A
公开(公告)日：1976-04-27
申请号：US509681
申请日：1974-09-26
IPC分类号： G01R22/00 , G01R21/127 , G01R21/133 , G06G7/161 , G01R7/00 , G01R11/32
CPC分类号： G01R21/127 , G01R21/133
摘要： This invention is an electronic kilowatthour meter with a time-division multiplier, wherein a proportional first current is derived from the load voltage without a voltage transformer and a proportional second current is derived by means of an inverting amplifier, with a polarity opposite to that of the first current and instantaneous values halved as compared to the first current, and that the first current is added to the second current in one of two switching conditions by means of a switch which is operated by a pulse width-frequency modulator controlled by the load current, so that the average value of the sum current is proportional to the product of the load current and the load voltage.
摘要翻译： 本发明是一种具有时分乘法器的电子千瓦表，其中从没有电压互感器的负载电压导出比例第一电流，并且通过反相放大器得到比例第二电流，其极性与 与第一电流相比，第一电流和瞬时值减半，并且通过由负载控制的脉冲宽度 - 频率调制器操作的开关将第一电流加到两个开关条件之一中的第二电流中 电流，使得和电流的平均值与负载电流和负载电压的乘积成比例。
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公开(公告)号：US6008635A
公开(公告)日：1999-12-28
申请号：US34930
申请日：1998-03-04
IPC分类号： G01R21/133 , G01R11/32
CPC分类号： G01R21/133
摘要： An electricity meter with differentiating input converters, in particular current converters, attains improved signal processing by providing a respective analog filter, in particular a low-pass filter, following each of the input converters. In this way, voltage peaks are limited for electronics downstream. Adulteration of measured signals caused by filters is compensated for by a digital filter in a downstream signal processing.
摘要翻译： 具有微分输入转换器，特别是电流转换器的电表通过在每个输入转换器之后提供相应的模拟滤波器，特别是低通滤波器来实现改进的信号处理。 以这种方式，下游的电子元件的电压峰值受到限制。 由滤波器引起的测量信号的掺杂由下游信号处理中的数字滤波器补偿。
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5.发明授权
公开(公告)号：US4835516A
公开(公告)日：1989-05-30
申请号：US21620
申请日：1987-03-02
IPC分类号： H04B3/56
CPC分类号： H04B3/56 , H04B2203/545 , H04B2203/5466 , H04B2203/5483
摘要： An arrangement for introducing audio-frequency signals into a power supply line containing a compensating capacitor, through a junction converter having primary winding which is connected with an audio-frequency signal generator. The secondary winding of the junction converter is connected in series with the compensating capacitors which are not located in a parallel branch line to the secondary winding of the junction converter, and thus do not represent a load on the audio-frequency signal. The audio-frequency signal is coupled into the power supply line through the compensating capacitors which are connected in series with the secondary winding, whereby the coupling in is effected, on the one hand, through one and, on the other hand, through two parallel-connected compensating capacitors.
摘要翻译： 一种通过具有与音频信号发生器连接的初级绕组的结转换器将音频信号引入到包含补偿电容器的电源线中的装置。 结转换器的次级绕组与不连接到并联转换器的次级绕组的并联支线的补偿电容器串联连接，因此不代表音频信号的负载。 音频信号通过与次级绕组串联连接的补偿电容器耦合到电源线中，从而耦合在一方面通过一个并且另一方面通过两个并联 连接的补偿电容器。
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