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公开(公告)号：US5754387A
公开(公告)日：1998-05-19
申请号：US663475
申请日：1996-06-13
CPC分类号： H01H47/002
摘要： Upon initiation of operation of a contactor from an unactuated condition to an actuated condition, the maximum magnitude of an initial current conducted to the coil of the contactor is determined. Once the contactor has been operated to the closed condition, the holding current is checked to determine if it exceeds a reference current. The reference current is a predetermined function of the maximum initial current. If the reference current is less than the holding current, a malfunction signal is provided. In another embodiment of the invention, a sensor is provided to sense the position of movable contacts connected with an armature of the contactor.
摘要翻译： 当接触器从未致动状态开始操作到致动状态时，确定传导到接触器的线圈的初始电流的最大幅度。 一旦接触器已经操作到关闭状态，检查保持电流以确定其是否超过参考电流。 参考电流是最大初始电流的预定函数。 如果参考电流小于保持电流，则提供故障信号。 在本发明的另一个实施例中，提供传感器以感测与接触器的电枢连接的可动触点的位置。
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公开(公告)号：US5561605A
公开(公告)日：1996-10-01
申请号：US438464
申请日：1995-05-10
CPC分类号： G01R31/025 , H02H1/0015 , H02H3/44 , H02H1/04
摘要： In an electric circuit supplying AC line current to a load (30, 31) from an AC source (26) of given frequency providing repetitive cycles, arc detection is provided by sensing cycle to cycle changes in the AC line current. The AC line current is sampled with a harmonic notch filter (72) at a plurality of n phases .THETA..sub.1 through .THETA..sub.n during each of a plurality of m cycles of the AC source (26), to provide a plurality of currents I.sub.n,m, where n is the phase and m is the cycle. The differences (I.sub.n,m)-(I.sub.n,m-x), where x is a designated number of cycles, provide a plurality of current difference signals. The absolute values of these current difference signals ID are accumulated in a synchronous summer (94) over the m cycles. An arc indicative signal is generated in response to given conditions and given combinations of conditions (116) of the cumulative absolute current difference signals ID. Cycle to cycle changes in AC line voltage are also sensed with a harmonic notch filter (146), and the arc indicative signal is disarmed in response to a given voltage condition. In further embodiments, subcycle changes are sensed.
摘要翻译： 在从提供重复周期的给定频率的AC源（26）向负载（30,31）提供AC线路电流的电路中，通过感测周期来循环改变AC线路电流来提供电弧检测。 在AC源（26）的多个m个周期的每一个期间，在多个n相THETA 1至THETA n处的谐波陷波滤波器（72）对AC线路电流进行采样，以提供多个电流In，m ，其中n是相位，m是周期。 差异（In，m） - （In，m-x），其中x是指定的周期数，提供多个电流差信号。 这些电流差信号ID的绝对值在m个周期的同步夏（94）中累加。 响应于给定条件和累积绝对电流差信号ID的条件（116）的给定组合，产生电弧指示信号。 还用谐波陷波滤波器（146）感测到交流线路电压的周期变化，并且响应于给定的电压条件来撤消电弧指示信号。 在另外的实施例中，感测到子周期变化。
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13.发明授权Two wire position sense and control of modulating gas valve or other electromechanical actuators 失效调节气阀或其他机电执行器的两线位置检测和控制
公开(公告)号：US5606236A
公开(公告)日：1997-02-25
申请号：US373168
申请日：1995-01-17
申请人： Charles J. Tennies , Todd L. King
发明人： Charles J. Tennies , Todd L. King
CPC分类号： F16K37/0041 , G01D5/2013 , G05D3/12 , G05B2219/37019 , G05B2219/37034 , G05B2219/41355
摘要： A method and system for controlling an electromechanical actuator assembly and measurement of actuator position via two drive wires to the actuator assembly. The system includes sensing the changing inductance of the actuator through the electrical drive line and associating the sensed inductance with a corresponding position of the actuating member.
摘要翻译： 一种用于控制机电致动器组件的方法和系统，以及通过两根驱动线将致动器位置测量到致动器组件。 该系统包括通过电驱动线感测致动器的变化的电感，并将感测到的电感与致动构件的对应位置相关联。
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公开(公告)号：US5452223A
公开(公告)日：1995-09-19
申请号：US110090
申请日：1993-08-20
CPC分类号： G01R31/025 , H02H1/0015 , H02H3/44 , H02H1/04
摘要： In an electric circuit supplying AC line current rent to a load (30, 31) from an AC source (26) of given frequency providing repetitive cycles, arc detection is provided by sensing cycle to cycle changes in the AC line current. The AC line current is sampled with a harmonic notch filter (72) at a plurality of n phases .THETA..sub.1 through .THETA..sub.n during each of a plurality of m cycles of the AC source (26), to provide a plurality of currents I.sub.n,m, where n is the phase and m is the cycle. The differences (I.sub.n,m)-(I.sub.n,m-x), where x is a designated number of cycles, provide a plurality of current difference signals. The absolute values of these current difference signals ID are accumulated in a synchronous summer (94) over the m cycles. An arc indicative signal is generated in response to given conditions and given combinations of conditions (116) of the cumulative absolute current difference signals ID. Cycle to cycle changes in AC line voltage are also sensed with a harmonic notch filter (146), and the arc indicative signal is disarmed in response to a given voltage condition. In further embodiments, subcycle changes are sensed.
摘要翻译： 在从提供重复周期的给定频率的AC源（26）向负载（30,31）提供AC线路电流租金的电路中，通过感测周期来循环改变AC线路电流来提供电弧检测。 在AC源（26）的多个m个周期的每一个期间，在多个n相THETA 1至THETA n处的谐波陷波滤波器（72）对AC线路电流进行采样，以提供多个电流In，m ，其中n是相位，m是周期。 差异（In，m） - （In，m-x），其中x是指定的周期数，提供多个电流差信号。 这些电流差信号ID的绝对值在m个周期的同步夏（94）中累加。 响应于给定条件和累积绝对电流差信号ID的条件（116）的给定组合，产生电弧指示信号。 还用谐波陷波滤波器（146）感测到交流线路电压的周期变化，并且响应于给定的电压条件来撤消电弧指示信号。 在另外的实施例中，感测到子周期变化。
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公开(公告)号：US5605318A
公开(公告)日：1997-02-25
申请号：US227425
申请日：1994-04-14
CPC分类号： F16K31/0668 , F25B41/062 , H01F7/1607 , F25B2341/065 , F25B2500/05 , Y02B30/72
摘要： A solenoid operated proportional control expansion valve having a tubular armature guide of non-magnetic material disposed externally of the valve blocks with a magnetic pole piece welded on the end of the tubular guide. A plastic encapsulated coil is received over the guide. The armature guide has a flange therein which in one embodiment is welded to a second flanged tube threaded into the valve blocks. In other embodiments the guide flange is directly mechanically fastened to the valve block. A cup-shaped pole frame is received over the coil for completing the magnetic flux loop about the coil.
摘要翻译： 一种电磁操作的比例控制膨胀阀，其具有设置在阀块外部的非磁性材料的管状电枢引导件，焊接在管状引导件的端部上的磁极片。 塑料封装的线圈被接收在引导件上。 电枢引导件在其中具有凸缘，在一个实施例中，凸缘被焊接到螺纹连接到阀块中的第二凸缘管中。 在其他实施例中，引导凸缘直接机械地紧固到阀块。 杯状的极框架被接收在线圈上以完成围绕线圈的磁通量环路。
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