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1. 发明授权

US4409542A Monitoring system for an LC filter circuit in an AC power network 失效
标题翻译：交流电源网络中LC滤波电路的监控系统
公开(公告)号：US4409542A
公开(公告)日：1983-10-11
申请号：US266279
申请日：1981-05-26
申请人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
发明人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
IPC分类号： G01R31/02 , H02H3/36 , H02H3/44 , H02H7/16 , H03H7/01 , G01R27/00
CPC分类号： H02H3/44 , H02H3/365 , H02H7/16
摘要： A monitoring system for measuring the phase currents of a filter circuit, the monitoring system having current measuring transformers coupled to respective filter sections for suppressing the harmonic content. Voltage measuring transformers are provided for measuring the network phase voltages, each such voltage measuring transformer being coupled to an electronic filter simulator and a filtering section for suppressing harmonic content. The fundamental frequency component of the measured phase currents and the simulated phase currents are conducted to transient comparator circuitry which is coupled to indicating and triggering circuitry having individual counter stages. Only rapid variations between the measured and simulated phase currents will result in fault indications, thereby preventing false indications resulting from variations in temperature.
摘要翻译：一种用于测量滤波器电路的相电流的监测系统，该监测系统具有耦合到相应滤波器部分的用于抑制谐波含量的电流测量变压器。提供电压测量变压器用于测量网络相电压，每个这样的电压测量变压器耦合到电子滤波器模拟器和用于抑制谐波含量的滤波部分。所测量的相电流和模拟相电流的基频分量被传送到瞬态比较器电路，该电路耦合到具有各个计数级的指示和触发电路。测量和模拟相电流之间的快速变化将导致故障指示，从而防止由温度变化引起的错误指示。

2. 发明授权

US4429338A Earth contact monitoring device for a polyphase three-phase filter circuit 失效
标题翻译：用于多相三相滤波电路的接地监测装置
公开(公告)号：US4429338A
公开(公告)日：1984-01-31
申请号：US395187
申请日：1982-07-06
申请人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
发明人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
IPC分类号： H02H3/16 , H02H7/00
CPC分类号： H02H3/165 , H02H7/00
摘要： A monitoring system for detecting earth contact of at least one phase of a polyphase network. Each of the phases in the network is connected by a capacitive-inductive filter to a neutral node which is connected to earth. In one embodiment of the invention, the current flowing from the neutral node to earth is detected by an induction current transformer which provides a signal responsive to said earth current. The output signal of the induction current transformer is conducted through at least one low pass filter for suppressing harmonics, and rectified to produce a direct current voltage signal, the amplitude of which is proportional to the amplitude of the fundamental frequency component of said signal. A fault indicating signal is produced when the direct voltage signal exceeds a predetermined value.
摘要翻译：一种用于检测多相网络的至少一相的接地接触的监测系统。网络中的每个相位通过电容感应滤波器连接到连接到地的中性点。在本发明的一个实施例中，从中性节点流向地的电流由感应电流互感器检测，感应电流互感器提供响应于所述接地电流的信号。感应电流互感器的输出信号通过至少一个用于抑制谐波的低通滤波器传导，并被整流以产生直流电压信号，该直流电压信号的幅度与所述信号的基频分量的振幅成比例。当直流电压信号超过预定值时，产生故障指示信号。

3. 发明授权

US3935551A Filter arrangement for a converter circuit 失效
标题翻译：转换器电路的滤波器布置
公开(公告)号：US3935551A
公开(公告)日：1976-01-27
申请号：US448296
申请日：1974-03-05
申请人： Wolfgang Henniger , Dusan Povh , Manfred Schraudolph
发明人： Wolfgang Henniger , Dusan Povh , Manfred Schraudolph
IPC分类号： H03H7/01 , H02M1/12 , H03H7/04
CPC分类号： H02M1/12
摘要： An improved filtering arrangement for a converter circuit in which a highpass filter, tuned to have a cutoff frequency which is less than the lowest harmonic to be filtered is provided instead of the customary plurality of filters tuned to individual harmonic currents. In a 12 pulse converter circuit, at least one highpass filter which is tuned to filter out harmonics starting with the fifth harmonic and which has a resonant frequency above the 11th harmonic is used.
摘要翻译：提供了一种改进的转换器电路的滤波装置，其中提供调谐到具有小于要滤波的最低谐波的截止频率的高通滤波器，而不是调整到单个谐波电流的常规多个滤波器。在12脉冲转换器电路中，使用至少一个高通滤波器，该高通滤波器被调谐以从五次谐波开始滤除谐波，并且具有高于11次谐波的谐振频率。

4. 发明授权

US4419621A Monitoring system for the capacitor batteries of a three-phase filter circuit 失效
标题翻译：三相滤波电路的电容电池监控系统
公开(公告)号：US4419621A
公开(公告)日：1983-12-06
申请号：US265459
申请日：1981-05-20
申请人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
发明人： Michael Becker , Alfons Fendt , Dusan Povh , Klaus Renz , Gerhard Schuch , Hermann Waldmann
IPC分类号： G01R31/00 , H02H3/36 , H02H3/44 , H02H7/16 , G01R31/02
CPC分类号： H02H3/365 , H02H3/44 , H02H7/16
摘要： A system for monitoring the capacitor batteries of a three-phase filter circuit. Each capacitor battery is formed of a plurality of parallel legs each having a plurality of sectional capacitors which are connected in series with fuses. Adjacent ones of the sectional capacitors are coupled to one another. In a three-phase system, three capacitor batteries are coupled to one another in a Y-circuit configuration, the Y-circuit node being coupled to a reference potential, illustratively ground. The magnitude and phase of the fundamental frequency component of the current flowing from the Y-circuit node to the reference potential is monitored, variations therein being evaluated to identify defective sectional capacitors. Only variations in the Y-circuit node current which occur rapidly will trigger fault signals, thereby preventing false indications resulting from variations in temperature.
摘要翻译：一种用于监测三相滤波电路的电容器电池的系统。每个电容器电池由多个平行腿构成，每个平行腿具有与保险丝串联连接的多个截面电容器。相邻的分段电容器彼此耦合。在三相系统中，三个电容器电池以Y电路配置彼此耦合，Y电路节点耦合到参考电位，示例性地接地。监视从Y电路节点流向参考电位的电流的基频分量的幅度和相位，评估其中的变化以识别有缺陷的分段电容器。只有迅速发生的Y电路节点电流的变化将触发故障信号，从而防止温度变化引起的错误指示。

5. 发明授权

US4326230A Circuit for monitoring the voltage stress of a capacitor 失效
标题翻译：用于监测电容器电压应力的电路
公开(公告)号：US4326230A
公开(公告)日：1982-04-20
申请号：US165809
申请日：1980-07-03
申请人： Michael Becker , Klaus Renz , Manfred Weibelzahl , Alfons Fendt , Dusan Povh , Gerhard Schuch , Hermann Waldmann
发明人： Michael Becker , Klaus Renz , Manfred Weibelzahl , Alfons Fendt , Dusan Povh , Gerhard Schuch , Hermann Waldmann
IPC分类号： H02H3/50 , H02H7/16
CPC分类号： H02H3/50 , H02H7/16
摘要： A circuit for monitoring the voltage stress of a capacitor which produces an over-stress indicator signal responsive to the over-voltage history of the capacitor. If the measured voltage stress of the capacitor exceeds a predetermined over-voltage value, a characteristic-curve generator, having a predetermined transfer function, produces an output signal which is responsive to the measured voltage stress of the capacitor and the transfer function of the characteristic-curve generator. This signal is combined with a further signal which is responsive to a predetermined permissible continuous operation voltage value. The combined signals are conducted to an integrator having a predetermined integration time constant for producing an overload signal. The overload signal at the output of the integrator is a measure of the state of stress of the capacitor. Circuitry may be provided for disconnecting the capacitor from a transmission line in response to the output signal of the integrator. Also, plural capacitor voltage stress monitoring stages may be combined to monitor the capacitor voltage stress in a plurality of over-voltage ranges.
摘要翻译：用于监测电容器的电压应力的电路，其产生响应于电容器的过电压历史的过应力指示器信号。如果电容器的测量电压应力超过预定的过电压值，则具有预定传递函数的特性曲线发生器产生响应于测量的电容器的电压和特性的传递函数的输出信号曲线发生器。该信号与响应于预定允许的连续工作电压值的另一信号组合。组合的信号被传导到具有预定积分时间常数的积分器，以产生过载信号。积分器输出端的过载信号是电容器应力状态的测量。可以提供电路，用于响应于积分器的输出信号将电容器与传输线路断开。此外，可以组合多个电容器电压应力监测级以监测多个过电压范围内的电容器电压应力。

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