-
公开(公告)号：US4725937A
公开(公告)日：1988-02-16
申请号：US926806
申请日：1986-10-30
CPC分类号： H02M3/3378
摘要： A method and apparatus for controlling the magnitude of an analog current through a load to be proportional to the magnitude of an input voltage. A sensing resistor is connected in series with the load. A controllable voltage is applied across the series connection of the load and sensing resistor for driving a current therethrough. A pulse width modulator receives the input voltage and a feedback voltage corresponding to the voltage drop across the sensing resistors when current is conducted thereby and produces square wave pulses each having a pulse width which is adjusted in response to a difference between the magnitudes of the input voltage and the feedback voltage. The magnitude of the controllable voltage is adjusted as a function of the pulse width of the square wave pulses until the magnitude of the current flowing through the load and sensing resistor causes the magnitude of feedback voltage to correspond to the magnitude of the input voltage so that the current through the load is maintained proportional to the magnitude of the input voltage.
摘要翻译： 一种用于控制通过负载的模拟电流的大小与输入电压的大小成比例的方法和装置。 感测电阻与负载串联连接。 在负载和感测电阻的串联连接上施加可控电压以驱动电流通过。 脉冲宽度调制器接收输入电压和对应于当电流传导时的感测电阻器两端的电压降的反馈电压，并产生每个具有脉冲宽度的方波脉冲，该脉冲宽度根据输入的幅度 电压和反馈电压。 可控电压的大小作为方波脉冲的脉冲宽度的函数进行调整，直到流过负载和感测电阻器的电流的大小导致反馈电压的大小对应于输入电压的大小，使得 通过负载的电流与输入电压的大小成比例。
-
2.发明授权
公开(公告)号：US5544065A
公开(公告)日：1996-08-06
申请号：US287972
申请日：1994-08-09
申请人： Joseph C. Engel , Thomas J. Kenny
发明人： Joseph C. Engel , Thomas J. Kenny
CPC分类号： G01R19/25
摘要： The frequency and sampling interval for synchronous sampling of an ac signal of unknown or varying frequency are accurately determined within one cycle by apparatus including an input circuit which generates a single input pulse for each cycle of the ac signal. The count of clock pulses maintained by a free running counter is recorded at each input pulse. The frequency of the ac signal is determined from the period of the ac signal calculated from the difference in the count stored at consecutive input pulses. This difference in the count is divided by the desired sampling rate to generate the sampling count which is repetitively added to the current running count to generate an interrupt count. A sampling interrupt utilized by an analog to digital converter to digitize the ac signal is generated when the running count equals the interrupt count. The same sampling interval is used for each phase of a multiphase signal; however, a separate sampling interval is established for each ac signal in a multisignal system.
摘要翻译： 未知或变化频率的交流信号的同步采样的频率和采样间隔在一个周期内被准确地确定，该装置包括为ac信号的每个周期产生单个输入脉冲的输入电路。 每个输入脉冲记录由自由运行计数器维持的时钟脉冲计数。 根据从连续的输入脉冲存储的计数的差计算出的交流信号的周期来确定交流信号的频率。 将该计数的差异除以期望的采样率，以产生重复地添加到当前运行计数以产生中断计数的采样计数。 当运行计数等于中断计数时，会产生模数转换器对ac信号进行数字化的采样中断。 对于多相信号的每个相位使用相同的采样间隔; 然而，在多信号系统中为每个交流信号建立单独的采样间隔。
-
3.发明授权Distributed microprocessor based sensor signal processing system for a complex process 失效基于分布式微处理器的传感器信号处理系统，用于复杂的过程
公开(公告)号：US4804515A
公开(公告)日：1989-02-14
申请号：US666696
申请日：1984-10-31
申请人： Albert W. Crew , James A. Neuner , Gilbert W. Remley , Robert E. Hager , George M. Chambers , Eric A. Delava , Susan A. Wilbur , Thomas J. Kenny , James F. Sutherland
发明人： Albert W. Crew , James A. Neuner , Gilbert W. Remley , Robert E. Hager , George M. Chambers , Eric A. Delava , Susan A. Wilbur , Thomas J. Kenny , James F. Sutherland
IPC分类号： G01D21/00 , G05B9/03 , G05B23/02 , G06F11/16 , G06F17/40 , G08C15/00 , G21C17/00 , G21D3/04 , G21C7/36
摘要： Signals from redundant sensors located throughout a pressurized water reactor (PWR) nuclear power plant are processed in four independent channel sets each of which includes a plurality of independent microcomputers which calibrate, convert to engineering units and calculate partial trip signals and engineered safeguard actuation signals from the sensor signals for use in the conventional voting logic of a plant protection system. The primary and secondary partial trip and engineered safeguard actuation functions associated with various postulated abnormal events are allocated to different independent microcomputers in the channel set for reliability. A test unit common to the channel set automatically, rapidly bypasses and tests each protection function independently while the other protection functions in the channel set remain on-line and also continually tests each microcomputer through a dummy test function performed along with the assigned protection functions. Signals representative of the analog value of the sensor signals are stored by the microcomputers and are transmitted by a serial data link through a common electrical isolation unit to a common analog output device for use by the plant control and monitoring systems under the control of a communication processor common to a group of microcomputers in the channel set.
摘要翻译： 来自位于整个压水反应堆（PWR）核电站的冗余传感器的信号在四个独立的通道组中进行处理，每个独立的通道组包括多个独立的微型计算机，其校准，转换为工程单位并计算部分跳闸信号和设计的保护启动信号 传感器信号用于植物保护系统的常规投票逻辑。 与各种假设的异常事件相关联的主要和次要部分行程和设计的保护动作功能被分配给可靠性通道组中的不同的独立微型计算机。 通道设置通用的测试单元自动快速旁路并测试每个保护功能，而通道组中的其他保护功能保持在线，并且还通过与分配的保护功能一起执行的虚拟测试功能来连续测试每台微型计算机。 代表传感器信号的模拟值的信号由微型计算机存储，并通过串行数据链路通过公共电气隔离单元发送到公共模拟输出设备，以供通信控制下的工厂控制和监控系统使用 通道集中的一组微型计算机共有的处理器。
-
公开(公告)号：US4651020A
公开(公告)日：1987-03-17
申请号：US774496
申请日：1985-09-10
申请人： Thomas J. Kenny , Carl A. Vitalbo
发明人： Thomas J. Kenny , Carl A. Vitalbo
CPC分类号： H02J9/061 , Y10T307/50 , Y10T307/505 , Y10T307/615 , Y10T307/729
摘要： A redundant power supply for digital control systems, such as one using a MULTI-BUS backplane which utilizes remote sensing power supplies and level holding capacitors to provide continuous operation when one of the power supplies fails. Embodiments of the invention include a dual redundant power supply system for a backplane having a pair of power buses which provide positive five volts, positive twelve volts and negative twelve volts with reference to ground. Equipment drawing relatively high currents, e.g., 40 amperes, can be continuously supplied with power at a voltage regulated to within .+-.0.1% of nominal values for each 10% change in current.
摘要翻译： 用于数字控制系统的冗余电源，例如使用MULTI-BUS背板的冗余电源，其利用遥感电源和电平保持电容器在电源出现故障时提供持续的操作。 本发明的实施例包括用于背板的双重冗余电力供应系统，该系统具有一对电源总线，其提供相对于地面的正五伏，正十二伏和负十二伏。 设备绘制相对较高的电流，例如40安培，可以以每10％的电流变化调节到额定值的+/- 0.1％的电压，连续地供电。
-
公开(公告)号：US4644440A
公开(公告)日：1987-02-17
申请号：US689691
申请日：1985-01-08
CPC分类号： G05F1/59 , H02J9/061 , Y10T307/615 , Y10T307/675
摘要： A redundant d.c. power supply arrangement for supplying power to a load circuit, wherein the power supply arrangement is subjected to voltage transients of high frequency and magnitude which emanate from the load circuit. The arrangement includes first and second power supply branches connected in electrical parallel with the load circuit. Each power supply branch includes a d.c. voltage supply and a Zener diode connected in electrical series with the voltage supply. The Zener diodes are selected and arranged for causing at least one of the voltage supplies to deliver power to the load circuit. Each Zener diode has a reverse breakdown voltage for clamping a voltage transient emanating from the load circuit to that Zener breakdown voltage and provides a low impedance path for a resulting current surge associated with the voltage transient.
摘要翻译： 冗余直流 用于向负载电路供电的电源装置，其中所述电源装置经受从所述负载电路发出的高频和大小的电压瞬变。 该装置包括与负载电路并联连接的第一和第二电源分支。 每个电源分支包括一个直流电 电压源和与电源电连接的齐纳二极管。 齐纳二极管被选择和布置成使得至少一个电压源向负载电路输送功率。 每个齐纳二极管具有反向击穿电压，用于钳位从负载电路发出的电压瞬变到该齐纳击穿电压，并为与电压瞬变相关的结果电流浪涌提供低阻抗路径。
-
公开(公告)号：US06504693B1
公开(公告)日：2003-01-07
申请号：US09514035
申请日：2000-02-25
IPC分类号： H02H300
摘要： A network protector relay for a circuit breaker includes a microcontroller routine which provides a positive sequence network voltage from polyphase network voltages on a network bus. Another microcontroller routine provides a positive sequence phasing voltage from the polyphase network voltages on the network bus and polyphase feeder voltages on a feeder bus. A recloser circuit automatically recloses the circuit breaker connected between the polyphase feeder bus and the polyphase network bus in response to a function of a plurality of setpoints and the positive sequence phasing voltage which indicates a first flow of power from the polyphase feeder bus to the polyphase network bus. A receiver receives a remote close command. Another routine temporarily changes at least one of the setpoints in response to the received close command, in order to conditionally close the circuit breaker for a second flow of power from the polyphase feeder bus to the polyphase network bus, with the second flow of power being less than the first flow of power.
摘要翻译： 用于断路器的网络保护器继电器包括微控制器程序，其在网络总线上从多相网络电压提供正序列网络电压。 另一个微控制器程序从网络总线上的多相网络电压和馈线总线上的多相馈线电压提供正序相位电压。 重合器电路响应于多个设定点的功能和正序列相位电压自动重新连接连接在多相馈线总线和多相网络总线之间的断路器，该正序列相位电压指示从多相馈线总线到多相的第一次功率流 网络总线 接收器接收远程关闭命令。 另一个例程响应于接收到的关闭命令暂时改变设定值中的至少一个，以便有条件地关闭断路器用于从多相馈线总线到多相网络总线的第二次功率流，其中第二次功率为 小于第一流动力。
-
7.发明授权
公开(公告)号：US4642636A
公开(公告)日：1987-02-10
申请号：US567456
申请日：1983-12-30
申请人： John R. Smith , Thomas J. Kenny , Kingsley F. Graham , James A. Neuner , Douglas A. Bauman , Timothy F. Thompson , William W. Wassel , Dhulipala M. Rao , David G. Theriault
发明人： John R. Smith , Thomas J. Kenny , Kingsley F. Graham , James A. Neuner , Douglas A. Bauman , Timothy F. Thompson , William W. Wassel , Dhulipala M. Rao , David G. Theriault
CPC分类号： G05B23/0256
摘要： Numerous signal conditioning circuits on a plurality of printed circuit boards are calibrated remotely by a signal processing unit which sends coded signals to each board, either sequentially or in parallel, to connect either on-board or off-board test signals to one of the conditioning circuits in place of its field generated input. The processing unit utilizes the actual and expected responses of each conditioning circuit to low and high test signals to generate a gain and an offset which are applied to the conditioned field signal to provide a calibrated signal. The time constant for each conditioning circuit is also measured periodically, or upon a selected temperature change, for use in generating a minimum waiting period for obtaining valid data following transfers between the field generated signals and the test signals.
摘要翻译： 多个印刷电路板上的许多信号调理电路由信号处理单元进行远程校准，信号处理单元顺序地或并行地向每个板发送编码信号，以将板上或板外测试信号连接到调节 电路代替其场产生的输入。 处理单元利用每个调理电路的实际和预期的响应来测量低和高的测试信号，以产生施加到调节的场信号以提供校准信号的增益和偏移。 每个调理电路的时间常数也是周期性地或在所选择的温度变化时测量的，用于产生用于在场产生的信号和测试信号之间的传输之后获得有效数据的最小等待周期。
-
8.发明授权Energy monitoring system for a plurality of local stations with snapshot polling from a central station 失效用于具有来自中心站的快照轮询的多个本地站的能量监视系统
公开(公告)号：US5315531A
公开(公告)日：1994-05-24
申请号：US915171
申请日：1992-07-15
IPC分类号： G01R21/133 , G01R21/00 , G01R22/00 , G08C25/00 , H05K11/00
CPC分类号： G01R21/133
摘要： A PC computer monitors the energy, power, voltage, and current consumed at a plurality of local stations placed behind the electrical meter of the utility company for individual billing of the local users, a bidirectional communication line being used therebetween. A command from the PC computer causes at each station the power, voltage, current and totalized energy to be stored, and thereafter the PC computer derives individually the results for separate estimations and central billing.
摘要翻译： PC计算机监视在公用事业公司的电表之后的多个本地电台消耗的能量，功率，电压和电流，用于本地用户的单独计费，其间使用双向通信线路。 来自PC机的命令导致每个站的功率，电压，电流和总能量被存储，此后，PC计算机分别得出结果以进行单独的估计和中央计费。
-
公开(公告)号：US5010507A
公开(公告)日：1991-04-23
申请号：US301406
申请日：1989-01-25
申请人： Thomas J. Kenny
发明人： Thomas J. Kenny
IPC分类号： H03H17/02
CPC分类号： H03H17/02
摘要： A sampled digital filter system for filtering a signal that has a frequency lower than an unwanted signal component in the input signal. The digital filter system samples the input signal in bursts at a rate satisfying the Nyquist criterion for the unwanted signal component.
-
公开(公告)号：US06407897B1
公开(公告)日：2002-06-18
申请号：US09540407
申请日：2000-03-31
IPC分类号： H02H300
摘要： A network protector is provided with diagnostics which alert a utility of component problems in detail. Selected measurements are used to assess the condition of various components such as for example, main contact electrical resistance, a blown fuse, the availability of sufficient voltage for charging the springs which close the main contacts and adequate voltage for tripping the contacts open. These abnormal operating conditions are transmitted to a remote station at the utility so that proper maintenance can be efficiently provided.
摘要翻译： 网络保护器具有诊断功能，可以详细地提醒组件问题的实用性。 所选的测量用于评估各种部件的状况，例如主接触电阻，熔断的保险丝，充满电压的充足电压，使弹簧闭合主触头和足够的电压以使触点断开。 这些异常操作条件被传送到公用事业的远程站，以便有效地提供适当的维护。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.018 秒)
