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332 条记录 (耗时 0.014 秒)

    Controller for fixed-time pull-in of a relay
    111.
    发明授权
    Controller for fixed-time pull-in of a relay 失效
    一个继电器固定时间控制器

    公开(公告)号：US5255152A

    公开(公告)日：1993-10-19

    申请号：US747831

    申请日：1991-08-21

    申请人： Bay E. Estes, III ,  Richard H. Noens

    发明人： Bay E. Estes, III ,  Richard H. Noens

    IPC分类号： H01H47/00 ,  H01H9/56 ,  H01H47/32 ,  H01H47/02 ,  H03K3/017

    CPC分类号： H01H9/56 ,  H01H47/325

    摘要： A controller for a relay controls the pull-in time of the armature of the relay by controlling the power applied to the relay coil. To determine the actual pull-in time, the time of closure of the contacts is sensed and the time at which power is applied to the coil is subtracted from it. The actual pull-in time is then compared with a stored value of ideal pull-in time to produce an error signal. The error signal corrects the level of power applied to the relay coil upon the next actuation of the relay, to make the actual pull-in time approximately equal to the ideal pull-in time. In some embodiments to control the level of power on the coil, a Gray-code counter samples a duty-cycle register in a micro-computer and produces a train of pulses that is filtered to provide a DC control signal. The DC control signal controls the duty cycle of a pulse-width-modulated oscillator that rapidly switches (modulates) the power to the relay coil.

    Circuit for driving a relay used in an AC circuit, with a protection against contact welding
    112.
    发明授权
    Circuit for driving a relay used in an AC circuit, with a protection against contact welding 失效
    用于驱动用于交流电路的继电器的电路，具有防止接触焊接的保护

    公开(公告)号：US4769737A

    公开(公告)日：1988-09-06

    申请号：US62603

    申请日：1987-06-16

    申请人： Yasuhiro Ogita ,  Tamotu Maegawa

    发明人： Yasuhiro Ogita ,  Tamotu Maegawa

    IPC分类号： H01H47/00 ,  H01H9/56 ,  H01H47/22 ,  H01H47/12

    CPC分类号： H01H9/56 ,  H01H47/002 ,  Y10T307/924

    摘要： A circuit for driving a relay having at least two contacts and an excitation coil. An AC power source is connected to the contacts of the relay for applying a voltage of a prescribed frequency to these contacts. A detector section compares a pulse current, induced in phase with the AC current supplied from the AC power source, with a reference value, thereby producing a detection signal. In accordance with this detection signal, the positive and negative phases of a signal having a cycle longer than, and being asychronous with, said AC current, are delayed alternately or at random, thereby generating a timing control signal. This timing control signal closes and opens said relay at random timings, thereby protecting the relay from contact welding.

    摘要翻译： 一种用于驱动具有至少两个触点和励磁线圈的继电器的电路。 AC电源连接到继电器的触点，以向这些触点施加规定频率的电压。 检测器部分将从AC电源提供的AC电流的同相感应脉冲电流与参考值进行比较，从而产生检测信号。 根据该检测信号，具有比所述AC电流长的周期并且与所述AC电流不同步的信号的正相和负相位被交替地或随机地延迟，从而产生定时控制信号。 该定时控制信号以随机定时关闭并打开所述继电器，从而保护继电器免受接触焊接。

    Electrically operated control device and system for an appliance and method of operating the same
    113.
    发明授权
    Electrically operated control device and system for an appliance and method of operating the same 失效
    用于电器的电动控制装置和系统及其操作方法

    公开(公告)号：US4745515A

    公开(公告)日：1988-05-17

    申请号：US869137

    申请日：1986-05-30

    申请人： Daniel L. Fowler

    发明人： Daniel L. Fowler

    IPC分类号： H01H9/56 ,  H05B6/68 ,  H02H7/00 ,  G05F1/10 ,  H01H47/28

    CPC分类号： H01H9/56 ,  H05B6/68 ,  H01H2009/566

    摘要： An electrically operated control device and system for an appliance and method of operating the same are provided, the system comprising a power source of alternating electrical current that has a repeating voltage wave cycle and a repeating current wave cycle, a load for using the electrical current to provide an output of the load for the appliance, a relay having normally open contacts and a coil for closing the contacts only when the coil is energized, an electrical circuit for interconnecting the power source to the load through the contacts only when the contacts are closed, and a control unit for causing the coil to close the contacts substantially at a certain point on the voltage wave cycle each time the relay coil closes the contacts from the open condition thereof whereby the current flow through the contacts at each closing thereof is at substantially a desired level thereof.

    摘要翻译： 提供一种用于器具的电动控制装置和系统及其操作方法，该系统包括具有重复的电压波周期和重复电流波周期的交流电流的电源，使用电流的负载 提供用于器具的负载的输出，具有常开触点的继电器和仅线圈被通电时用于闭合触点的线圈;电路，用于仅当触点是通过触点将电源与负载相互连接时 闭合，以及控制单元，用于在每次继电器线圈从其断开状态闭合触点时使线圈基本上在电压波周期上的某一点处闭合触点，由此在其每次闭合时通过触点的电流处于 基本上是其期望的水平。

    Apparatus for extending contact life of relays utilized for a.c. load switching
    114.
    发明授权
    Apparatus for extending contact life of relays utilized for a.c. load switching 失效
    延长用于交流负载开关的继电器的接触寿命的设备

    公开(公告)号：US3707634A

    公开(公告)日：1972-12-26

    申请号：US3707634D

    申请日：1971-03-31

    申请人： SPERRY RAND CORP

    发明人： ARLEN DAVID ,  GUIDO LOUIS A ,  QUINN LAWRENCE P

    IPC分类号： H01H9/56 ,  H01H1/50

    CPC分类号： H01H9/56 ,  Y10T307/931

    摘要： Apparatus for use with a relay utilized to switch alternating current loads to extend the contact life thereof. Circuits are included to cause alternate energization of the relay to occur in time coincidence with points on the alternating current waveform that are 180* apart, respectively. Thus, the alternate operations of the relay occur at alternate polarities of the a.c. waveform switched. Hence, contact material transferred from one contact to the other during one relay operation is re-transferred from the other contact to the one on the next following relay operation.

    摘要翻译： 用于继电器的装置，用于切换交流负载以延长其接触寿命。 包括电路以使继电器的交替通电分别与间隔180°的交流电流波形的时间一致地发生。 因此，继电器的交替操作发生在交流电的交替极性。 波形切换。 因此，在一个继电器操作期间从一个触点传送到另一个触头的触点材料从另一个触点重新传送到下一个继电器操作的触点。