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95 条记录 (耗时 0.017 秒)

    Arc detection device, corresponding method, and electronic component
    2.
    发明授权
    Arc detection device, corresponding method, and electronic component 有权

    公开(公告)号：US10998707B2

    公开(公告)日：2021-05-04

    申请号：US16063620

    申请日：2016-12-07

    申请人： Robert Bosch GmbH

    发明人： Jiahang Jin ,  Arndt Wagner ,  Hans Geyer

    IPC分类号： H02H3/08 ,  H02H1/00 ,  G01R31/12 ,  H02H3/52 ,  G01R23/16 ,  H02H3/50 ,  G01R31/52

    摘要： The invention relates to a detection device (100) for detecting an arc (104a-i; 909) occurring between a first current-carrying element (103; 903a) and at least one conductive element (103b, 108; 903b, 907), comprising at least one measuring device (101; 901, 902), which is designed to measure a current (I) flowing through the first current-carrying element (103a; 903a), and an analysis device (102) which is designed to determine a frequency spectrum of the measured current (I) and to detect the arc (104a-i; 909) occurring between the first current-carrying element (103a; 903a) and the at least one conductive element (103b, 108; 903b, 907) on the basis of a high-frequency range of the determined frequency spectrum.

    SYSTEM AND METHOD TO INTERRUPT A DC CURRENT IN A HIGH VOLTAGE CIRCUIT BY USE OF AN AC CIRCUIT BREAKER
    5.
    发明申请
    SYSTEM AND METHOD TO INTERRUPT A DC CURRENT IN A HIGH VOLTAGE CIRCUIT BY USE OF AN AC CIRCUIT BREAKER 有权
    通过使用交流电路断路器中断高压直流电路的系统和方法

    公开(公告)号：US20140376132A1

    公开(公告)日：2014-12-25

    申请号：US14480092

    申请日：2014-09-08

    申请人： Lighthouse Energy Solutions LLC

    发明人： William A. Carter ,  Scott C. Carter ,  Ilkka T. Pylkkanen

    IPC分类号： H02H3/50

    CPC分类号： H02H3/093 ,  H02G15/34 ,  H02H7/268 ,  H02J3/36 ,  H02J2003/365 ,  Y02E60/60

    摘要： An electrical circuit to interrupt a DC current includes a bypass switch and an AC high voltage breaker which includes interrupters that are rated for carrying a current having a value of the DC current for a period of time less than or equal to continuous duty. The first interrupter is electrically coupled in parallel with the bypass switch. A making switch causes a cancellation current to flow from an energy source through the second interrupter, and through the first interrupter, in addition to the DC current. The AC high voltage breaker is adapted to a DC service as the DC current in addition to the cancellation current causes an arc quench which allows the AC high voltage breaker to cause the interruption of the DC current in the electrical circuit. A method for interrupting a DC current flowing in an AC high voltage circuit breaker is also described.

    摘要翻译： 用于中断直流电流的电路包括旁路开关和交流高压断路器，其包括额定用于承载具有小于或等于连续负载的时间段的直流电流值的电流的断流器。 第一断路器与旁路开关并联电耦合。 除了直流电流之外，制动开关使得取消电流从能量源流过第二断流器，并且通过第一断路器。 交流高压断路器适用于直流服务，除了消除电流之外，直流电流导致电弧熄灭，允许交流高压断路器引起电路中直流电流的中断。 还描述了用于中断在交流高压断路器中流动的直流电流的方法。

    Power status monitor for electronic system
    6.
    发明授权
    Power status monitor for electronic system 失效
    电子系统电源状态监控

    公开(公告)号：US4742424A

    公开(公告)日：1988-05-03

    申请号：US43646

    申请日：1987-04-28

    申请人： Jeffrey A. Kautzer ,  David C. Yates ,  Gerd Mewitz ,  Edward D. Nonnweiler

    发明人： Jeffrey A. Kautzer ,  David C. Yates ,  Gerd Mewitz ,  Edward D. Nonnweiler

    IPC分类号： H02H6/00 ,  H02H3/24 ,  H02H3/46 ,  H02J1/00 ,  H02J9/00 ,  H02J9/06 ,  H02H3/50

    CPC分类号： H02H3/24 ,  H02H3/46 ,  Y10T307/852 ,  Y10T307/858

    摘要： A power status monitor for an electronic system includes a charge/discharge model of the system power supply. The charge/discharge model contains an estimate of the amount of time during which energy-storage devices in a system DC power supply are capable of maintaining system operation following loss of AC power. The power status monitor monitors the frequency and an amplitude of the voltage of the AC power source for signs indicating imminent failure of the AC power source. In the event that such signs are detected, the estimate in the charge/discharge model is decremented at a rate corresponding to the rate at which charge is consumed. A trip value, applied to the charge/discharge model, determines the time at which a signal is generated enabling an orderly shutdown of the system load. If acceptable AC power is resumed before the trip value is reached, the charge/discharge model increases its estimate of the time available at a rate corresponding to the charge accumulation in the DC power supply.

    Elevator safety device
    7.
    发明授权
    Elevator safety device 失效
    电梯安全装置

    公开(公告)号：US4133413A

    公开(公告)日：1979-01-09

    申请号：US818929

    申请日：1977-07-25

    申请人： Eiki Watanabe

    发明人： Eiki Watanabe

    IPC分类号： B66B1/32 ,  B66B5/02 ,  H02H3/50 ,  H02H7/08 ,  H02P7/292

    CPC分类号： H02H7/0844 ,  B66B5/02 ,  H02H3/50 ,  H02P7/293

    摘要： An armature of an electric motor for an elevator car is controllably driven by a three-phase source through a semiconductor converter controlled with a difference between a command and an actual car speed signal. A relay for sensing a ripple current from the converter is serially connected to a tuned filter across the armature. When a break occurs anywhere in a circuit with the motor armature, the sensor relay is deenergized and connects an emergency braking circuit across the armature. Alternatively the sensor relay may be connected via the filter to a reactor connected to the converter.

    摘要翻译： 用于电梯轿厢的电动机的电枢由三相电源通过由指令和实际轿厢速度信号之间的差异控制的半导体转换器可控地驱动。 用于感测来自转换器的纹波电流的继电器串联连接到跨越电枢的调谐滤波器。 当电机电枢电路中的任何地方发生断路时，传感器继电器断电，并将电枢上的紧急制动电路连接起来。 或者，传感器继电器可以经由过滤器连接到连接到转换器的电抗器。

    Speaker protection circuit
    8.
    发明授权
    Speaker protection circuit 失效
    扬声器保护电路

    公开(公告)号：US4034268A

    公开(公告)日：1977-07-05

    申请号：US630598

    申请日：1975-11-10

    申请人： David E. Klauck

    发明人： David E. Klauck

    IPC分类号： H02H3/50 ,  H02H11/00 ,  H03F1/30 ,  H04R3/00 ,  H02H3/00

    CPC分类号： H03F1/305 ,  H02H11/00 ,  H02H3/50 ,  H04R3/007

    摘要： A circuit for protecting speakers connected to the output of an audio amplifier. The output of the amplifier is connected to a filter which blocks normal audio frequency signals but passes both high and low frequency signals outside the normal audio range. The positive and negative filter output signals are connected respectively to the inverting and non-inverting inputs of an operational amplifier whose output is connected via a turn-on delay circuit to a speaker relay, which, when closed, connects the speaker to the amplifier. The turn-on delay circuit prevents speaker relay closure until turn-on transients have ended. If a DC voltage or a high frequency signal is present at the amplifier output, the operational amplifier generates a signal to open the relay thereby disconnecting the speaker from the amplifier output. The speaker relay quickly opens when power is turned off so that amplifier turn-off transients are not connected to the speaker either.

    摘要翻译： 用于保护连接到音频放大器的输出的扬声器的电路。 放大器的输出连接到滤波器，该滤波器阻止正常音频信号，但通过正常音频范围之外的高频和低频信号。 正和负滤波器输出信号分别连接到运算放大器的反相和非反相输入，其输出通过导通延迟电路连接到扬声器继电器，当关闭时，扬声器继电器将扬声器连接到放大器。 导通延迟电路可防止扬声器继电器闭合，直到接通瞬变结束。 如果在放大器输出处存在直流电压或高频信号，则运算放大器产生信号以打开继电器，从而将扬声器与放大器输出断开。 扬声器继电器在电源关闭时快速打开，使放大器关闭瞬变也不连接到扬声器。

    Protective system for stereo loudspeakers
    9.
    发明授权
    Protective system for stereo loudspeakers 失效
    立体声扬声器保护系统

    公开(公告)号：US3965295A

    公开(公告)日：1976-06-22

    申请号：US489407

    申请日：1974-07-17

    申请人： Ronald C. Evans ,  Sidney A. Corderman

    发明人： Ronald C. Evans ,  Sidney A. Corderman

    IPC分类号： H02H3/50 ,  H03F1/30 ,  H03F1/52 ,  H02H3/20 ,  H02H7/20

    CPC分类号： H03F1/52 ,  H02H3/50 ,  H03F1/305

    摘要： In an amplification system comprising an amplifier, a loudspeaker, normally open contacts connected in series between the amplifier and the speaker, and a power supply for the amplifier having relatively long buildup and decay times of its output voltage in response respectively to the connection and disconnection of the power supply to and from the a.c. line, means are provided responsive to the connection of the power supply to the a.c. line for delaying the closing of the normally open contacts until after the power supply voltage has built up to its full operating potential for eliminating the transient audio signals from the amplifier associated with power supply voltage buildup from being reproduced by the loudspeaker. Means are also provided for opening the contacts quickly after the power supply is disconnected from the a.c. line for eliminating the distorted audio signals from the amplifier associated with power supply decay from being reproduced by the loudspeaker. Additionally, if the amplifier is of the balanced type which exhibits a zero d.c. output potential during normal operation, means are provided for quickly opening the contacts upon the occurrence of a high d.c. amplifier output potential of either polarity for protecting the loudspeaker.

    摘要翻译： 在包括放大器，扬声器，放大器和扬声器之间串联连接的常开触点的放大器系统中，以及用于放大器的电源，其分别响应于连接和断开响应而具有较高的输出电压积累和衰减时间 的电源往返于交流电 线路，装置是响应于电源与直流的连接而提供的。 用于延迟常开触点的闭合，直到电源电压已经建立到其全部操作电位，以消除来自与扬声器再现的电源电压累积相关联的放大器的瞬态音频信号。 还提供了在电源与电源断开之后快速打开触点的装置。 线，用于消除来自放大器的失真的音频信号，该放大器与由电源衰减的衰减从扬声器再现。 另外，如果放大器是平衡型，表现为零直流。 在正常运行期间的输出电位，提供用于在高直流电压发生时快速打开触点的装置。 用于保护扬声器的任一极性的放大器输出电位。