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公开(公告)号：US5185686A
公开(公告)日：1993-02-09
申请号：US676840
申请日：1991-03-28
CPC分类号： G01R31/08 , H02H1/0015
摘要： An arc detection method and apparatus is provided for an electric circuit having an electrified conductor (46) connecting a voltage source (26) to a load (30), the conductor having a line side extending from the arc detector to the voltage source, and a load side extending from the arc detector to the load. The arc detector includes a field sensor (62) sensing the electromagnetic field established about the conductor by the occurrence of an electrical arc in the circuit, and generating a field responsive signal in response thereto. Direction sensing circuitry detects whether the arc is from the load side or the line side, and generates a direction indicative signal.
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12.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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公开(公告)号：US5185684A
公开(公告)日：1993-02-09
申请号：US676738
申请日：1991-03-28
CPC分类号： H02H1/0015 , G01R15/181 , G01R29/12 , G01R31/08
摘要： An arc detection method and apparatus is provided for an electric circuit having an electrified conductor (46) connecting a voltage source (26) to a load (30). A field sensor senses an electromagnetic field established about the conductor by the occurrence of an electrical arc in the circuit, and generates a field responsive signal. Arc discrimination circuitry includes frequency responsive circuitry responding to the field sensor and generating an arc indicative signal in response to a given frequency characteristic of the field responsive signal. The frequency responsive circuitry monitors a plurality of different frequencies of the field responsive signal, and generates the arc indicative signal in response to a given combination of field responsive signal frequencies. A comb filter passes the field responsive signal through a plurality of passbands, and the arc indicative signal is generated in response to a given frequency signature of the field responsive signal.
摘要翻译： 为具有将电压源（26）连接到负载（30）的带电导体（46）的电路提供电弧检测方法和装置。 场传感器通过在电路中发生电弧来感测建立在导体周围的电磁场，并产生场响应信号。 电弧鉴别电路包括响应于现场传感器的频率响应电路并响应于场响应信号的给定频率特性产生电弧指示信号。 频率响应电路监测场响应信号的多个不同频率，并且响应于场响应信号频率的给定组合产生电弧指示信号。 梳状滤波器通过多个通带通过场响应信号，并且响应于场响应信号的给定频率特征产生电弧指示信号。
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