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公开(公告)号：US4210948A
公开(公告)日：1980-07-01
申请号：US915898
申请日：1978-06-15
申请人： Richard W. Waltz
发明人： Richard W. Waltz
摘要： A method of monitoring open phase, phase reversal and voltage unbalance conditions in a polyphase source includes shifting the phase of signals which are proportional to the line voltages in a three-phase A.C. power source by 180.degree., +60.degree., and -60.degree., respectively, and summing the phase-shifted signals to generate a signal which is proportional to the negative-sequence component of the three-phase line voltage. This signal is rectified and compared with a reference signal. If a net negative-sequence signal is generated over a sufficient time period a positive output signal decreases until it crosses a switching threshold to disconnect a load from the source. The output signal will not rise again to the switching threshold, thereby allowing reconnection of the load, until the negative-sequence signal subsides and is less than the reference signal. A circuit is disclosed with three operational amplifiers and two passive filters to carry out the invented method.
摘要翻译： 监测多相电源中的开路相位，相位反转和电压不平衡状况的方法包括将三相交流电源中线路电压成比例的信号相位偏移180°，+ 60°和-60° 并且相移信号求和以产生与三相线路电压的负序分量成比例的信号。 该信号被整流并与参考信号进行比较。 如果在足够的时间周期内产生净负序信号，则正输出信号减小直到其跨越切换阈值以将负载与源断开。 输出信号不会再次上升到切换阈值，从而允许重新连接负载，直到负序信号消失并小于参考信号。 公开了一种具有三个运算放大器和两个无源滤波器来实现本发明方法的电路。
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公开(公告)号：US4195324A
公开(公告)日：1980-03-25
申请号：US928303
申请日：1978-07-26
申请人： Richard W. Waltz
发明人： Richard W. Waltz
CPC分类号： H02K15/125
摘要： An SCR is connected across one of three line contacts which couple the power lines to the windings of an a.c. motor. When the line contacts are opened to shut down the motor, heating current is applied to one of the motor windings through the SCR to raise its temperature above the ambient dew point. The SCR is fired every cycle of the line current and the firing angle is controlled in response to a command signal to provide the proper amount of heating current in the motor winding. The command signal is generated by summing a preselected reference signal with a negative feedback signal which is indicative of the amount of motor heating.
摘要翻译： 一个SCR连接在三个线路触点之一上，三个线路触点将电源线耦合到一个交流电源的绕组。 发动机。 当线路触点打开以关闭电机时，加热电流通过SCR施加到电机绕组中的一个，以将其温度升高到高于环境露点。 在线路电流的每个周期中烧制SCR，并且响应于命令信号来控制触发角以在电动机绕组中提供适当的加热电流量。 通过将预选参考信号与表示电动机加热量的负反馈信号相加来产生指令信号。
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3.发明授权公开(公告)号：US06493202B2
公开(公告)日：2002-12-10
申请号：US09791341
申请日：2001-02-23
申请人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
发明人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
IPC分类号： H01H4700
CPC分类号： H01H50/30 , H01H47/08 , H01H50/44 , H01H50/546
摘要： An electromagnetic operator includes first and second coils wound coaxially. An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.
摘要翻译： 电磁操作器包括同轴缠绕的第一和第二线圈。 电枢部分地围绕线圈，用于在线圈通电期间引导通量。 电枢可以由弯曲板形成并固定到铁磁性支撑件。 控制电路在操作期间向线圈施加通电信号。 两个线圈在初始操作阶段都通电。 其中一个线圈随后自动释放或断电。 定时电路在可变时间段之后从第二线圈去除电流。 该时间段可以是诸如RC时间常数和激励信号的定时电路的配置的函数。
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公开(公告)号：US06411489B1
公开(公告)日：2002-06-25
申请号：US09792702
申请日：2001-02-23
申请人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
发明人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
IPC分类号： H01H900
CPC分类号： H01H50/30 , H01H47/08 , H01H50/44 , H01H50/546
摘要： An electromagnetic operator includes first and second coils wound coaxially. An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.
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公开(公告)号：US06198614B1
公开(公告)日：2001-03-06
申请号：US09165011
申请日：1998-09-30
申请人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Jeffrey R. Annis , Christopher J. Wieloch
发明人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Jeffrey R. Annis , Christopher J. Wieloch
IPC分类号： H01H7300
CPC分类号： H01H47/08 , H01H47/223
摘要： An electrical contactor includes an electromagnetic operator which may be powered by either AC or DC power. For use with AC power, a rectifier circuit converts AC waveforms to DC waveforms and applies the converted power to DC one or more DC coils. The rectifier circuitry applies DC power directly to a bus. A pair of coils may be used, such as separate pickup and holding coils. The pickup coil may be de-energized after an initial phase of operation. To permit rapid release of the holding coil, a control circuit interrupts an induced current path through the coil upon removal of power from the bus.
摘要翻译： 电接触器包括可由AC或DC电源供电的电磁操作器。 为了与交流电源一起使用，整流电路将交流波形转换为直流波形，并将转换的功率转换为直流一个或多个直流线圈。 整流电路将直流电直接施加到总线上。 可以使用一对线圈，例如单独的拾取和保持线圈。 拾取线圈可以在初始操作阶段之后被断电。 为了允许保持线圈的快速释放，当从总线移除电力时，控制电路中断通过线圈的感应电流路径。
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6.发明授权公开(公告)号：US06282076B1
公开(公告)日：2001-08-28
申请号：US09410251
申请日：1999-09-30
申请人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
发明人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
IPC分类号： H01H4728
CPC分类号： H01H50/30 , H01H47/08 , H01H50/44 , H01H50/546
摘要： An electromagnetic operator includes first and second coils wound coaxially. An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.
摘要翻译： 电磁操作器包括同轴缠绕的第一和第二线圈。 电枢部分地围绕线圈，用于在线圈通电期间引导通量。 电枢可以由弯曲板形成并固定到铁磁性支撑件。 控制电路在操作期间向线圈施加通电信号。 两个线圈在初始操作阶段都通电。 其中一个线圈随后自动释放或断电。 定时电路在可变时间段之后从第二线圈去除电流。 该时间段可以是诸如RC时间常数和激励信号的定时电路的配置的函数。
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7.发明授权公开(公告)号：US06233131B1
公开(公告)日：2001-05-15
申请号：US09164205
申请日：1998-09-30
申请人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
发明人： Mark A. Kappel , Richard W. Waltz , Richard G. Smith , Donald F. Swietlik , Raymond H. Hannula , Christopher J. Wieloch , Jeffrey R. Annis
IPC分类号： H01H900
CPC分类号： H01H50/30 , H01H47/08 , H01H50/44 , H01H50/546
摘要： An electromagnetic operator includes first and second coils wound coaxially An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.
摘要翻译： 电磁操作器包括同轴缠绕的第一和第二线圈。电枢部分地围绕线圈，以在线圈通电期间引导通量。 电枢可以由弯曲板形成并固定到铁磁性支撑件。 控制电路在操作期间向线圈施加通电信号。 两个线圈在初始操作阶段都通电。 其中一个线圈随后自动释放或断电。 定时电路在可变时间段之后从第二线圈去除电流。 该时间段可以是诸如RC时间常数和激励信号的定时电路的配置的函数。
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公开(公告)号：US5657194A
公开(公告)日：1997-08-12
申请号：US508771
申请日：1995-07-28
申请人： Richard W. Waltz
发明人： Richard W. Waltz
摘要： A reset circuit for an overload relay includes a timing circuit coupled to a switching circuit for automatically resetting the relay a predetermined time after a trip. The timing circuit includes a capacitor and a resistor in parallel with a reset coil. The capacitor is charged during normal operation and begins to discharge through the resistor following a trip at a first rate determined by the size of the resistor. The switching circuit includes a pair of transistors, a pair of capacitors and a pair of resistors. When the capacitor in the timing circuit has discharged a predetermined amount following a trip, the switching circuit is triggered and couples the capacitor to ground through one of the transistors, causing a rush of current through the reset coil sufficient to reset the relay.
摘要翻译： 用于过载继电器的复位电路包括连接到开关电路的定时电路，用于在跳闸之后的预定时间内自动复位继电器。 定时电路包括电容器和与复位线圈并联的电阻器。 电容器在正常操作期间被充电，并且以由电阻器的尺寸确定的第一速率的跳闸开始通过电阻器放电。 开关电路包括一对晶体管，一对电容器和一对电阻器。 当定时电路中的电容器在跳闸之后已经放电了预定量时，开关电路被触发，并且通过晶体管中的一个将电容器耦合到地，导致通过复位线圈的电流的冲击足以复位继电器。
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公开(公告)号：US5283708A
公开(公告)日：1994-02-01
申请号：US950984
申请日：1992-09-23
申请人： Richard W. Waltz
发明人： Richard W. Waltz
摘要： A device protects an electric load, such as a motor, from excessive current levels. The current flows from a source to the load through a switch and a primary winding of a current sensing transformer. The voltage across a secondary winding of the current sensing transformer is rectified to produce a voltage which is measured to determine the level of current through the load. The voltage across the secondary winding also powers components of the device. In a first mode of operation, current from the secondary winding is applied to charge a power supply capacitor. In a second mode of operation the level of the rectified voltage is sensed to produce a sample of the level of the current flowing through the load. From this sample the change in temperature of the load since a previous sample is calculated and used to derive the present load temperature. When the present load temperature exceeds a defined threshold level, the switch is opened to disconnect the load from the electricity source.
摘要翻译： 设备可保护电动负载（如电机）免受过大电流的影响。 电流通过电流感应变压器的开关和初级绕组从源极流向负载。 电流检测变压器的次级绕组上的电压被整流以产生被测量的电压，以确定通过负载的电流水平。 次级绕组两端的电压也为器件的部件供电。 在第一操作模式中，施加来自次级绕组的电流以对电源电容器充电。 在第二操作模式中，感测整流电压的电平以产生流过负载的电流的电平的样本。 从该样品中，计算出先前样品的负载温度变化并用于导出当前的负载温度。 当当前负载温度超过规定的阈值电平时，开关断开负载与电源的连接。
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