公开(公告)号：US5515597A

公开(公告)日：1996-05-14

申请号：US144110

申请日：1993-10-27

Applicant: Leroy J. Herbst ,  Michael W. Knight

Inventor： Leroy J. Herbst ,  Michael W. Knight

IPC: H01F41/02 ,  H01F41/06

CPC classification number: H01F41/08 ,  H01F41/0213 ,  H01F41/064 ,  Y10T29/49071

Abstract: A method for laminating a magnetic core of a three-phase current transformer uses a continuous length of magnetic metal material and a mandrel having first, second, third, and fourth sets of pins mounted to a mandrel plate. The second and third pin sets are located adjacent one another, adjacent the respective first and fourth pin sets, and between the first and fourth pin sets. The third and fourth pin sets are movable between a retracted position within the mandrel plate and an extended position extending from the mandrel plate. The third and fourth pin sets are first positioned in the retracted position, and a first portion of the length of magnetic material is wound about the first and second pin sets to form the first phase section of the magnetic core. After moving the third pin set to the extended position, a second portion of the length of magnetic material is wound about the first and third pin sets to form the second phase section. After moving the fourth pin set to the extended position, a third portion of the length of magnetic material is wound about the first and fourth pin sets to form the third phase section, thereby forming the magnetic core. In another lamination method, each phase section is separately formed by continuously winding a respective length of magnetic metal material about a respective rotating mandrel. The magnetic core is formed by connecting the separately laminated phase sections.

Abstract translation: 用于层叠三相电流互感器的磁芯的方法使用连续长度的磁性金属材料和具有安装在心轴板上的第一组，第二组，第三组和第四组销的心轴。 第二和第三销组彼此相邻，邻近相应的第一和第四销组以及第一和第四销组之间。 第三和第四销组件可在心轴板内的缩回位置和从心轴板延伸的延伸位置之间移动。 第三和第四销组首先定位在缩回位置，并且磁性材料长度的第一部分围绕第一和第二销组缠绕以形成磁芯的第一相位段。 在将第三销钉移动到延伸位置之后，磁性材料长度的第二部分围绕第一和第三销钉组合以形成第二相位段。 在将第四销钉移动到延伸位置之后，将磁性材料长度的第三部分卷绕在第一和第四销组上以形成第三相段，从而形成磁芯。 在另一层压方法中，通过围绕相应的旋转心轴连续缠绕相应长度的磁性金属材料来分别形成每个相段。 磁芯通过连接单独层压的相段形成。

公开(公告)号：US5510773A

公开(公告)日：1996-04-23

申请号：US323469

申请日：1994-10-14

Applicant: Barry Rodgers

Inventor： Barry Rodgers

IPC: G08B21/20 ,  H02H1/06 ,  G08B21/00

CPC classification number: G08B21/185 ,  H02H1/066

Abstract: The present invention provides a low burden visual POWER ON indicator for a self-powered electrical circuit protection device. The visual indicator includes a current transformer for producing an induced current in direct proportion to the current supplied to an electrical device protected by the protection device. The induced current is summed and rectified. An energy accumulator stores a predetermined voltage required to operate the protection device. The stored voltage is controlled by an accumulation switch which in turn is controlled by a hysteresis control circuit. The hysteresis control circuit includes an operational amplifier which is biased by a stable reference voltage. When the voltage on the energy accumulator is equal to the stable reference voltage the operational amplifier produces a HIGH output signal. When the voltage on the energy accumulator is less than the stable reference voltage the operational amplifier produces a LOW output signal. A HIGH output signal causes the power accumulation switch to close thereby diverting current away from the energy accumulator. A LOW output signal opens the power accumulation switch causing current to flow to the energy accumulator thereby charging it. An LED is electrically connected to the operational amplifier such that it is illuminated only when the operational amplifier produces a HIGH output signal and thereby provides a visual indication of the POWER ON state of the protection device.

Abstract translation: 本发明提供了一种用于自供电电路保护装置的低负担视觉POWER ON指示器。 视觉指示器包括用于产生感应电流的电流互感器，该感应电流与提供给由保护装置保护的电气装置的电流成正比。 感应电流相加和整流。 能量蓄能器存储操作保护装置所需的预定电压。 存储的电压由积累开关控制，累加开关又由滞后控制电路控制。 滞后控制电路包括被稳定的参考电压偏置的运算放大器。 当蓄能器上的电压等于稳定的参考电压时，运算放大器产生高输出信号。 当蓄能器上的电压小于稳定的参考电压时，运算放大器产生低输出信号。 高输出信号使得功率累积开关闭合，从而将电流转移离开蓄能器。 低输出信号打开功率累积开关，使电流流向能量蓄能器，从而对其进行充电。 LED电连接到运算放大器，使得仅当运算放大器产生高输出信号并且因此提供保护装置的电源接通状态的可视指示时才将其照亮。

公开(公告)号：US5504292A

公开(公告)日：1996-04-02

申请号：US195233

申请日：1994-02-14

Applicant: Dale W. Bennett ,  James V. Fixemer ,  Teresa I. Hood ,  Joel L. Miller ,  Charles E. Netolicky ,  Tamara L. Schultz ,  Randall L. Siebels ,  Douglas Van Waart

Inventor： Dale W. Bennett ,  James V. Fixemer ,  Teresa I. Hood ,  Joel L. Miller ,  Charles E. Netolicky ,  Tamara L. Schultz ,  Randall L. Siebels ,  Douglas Van Waart

IPC: H01H33/20 ,  H01H9/34 ,  H01H73/18 ,  H01H33/08

CPC classification number: H01H9/34 ,  H01H2300/042

Abstract: An arc stack for receiving a circuit breaker blade moveable between a closed position and an open position, includes a plurality of arc plates positioned substantially parallel to one another and arranged in a plurality of adjacent groups. Each of the groups includes one or more arc plates having substantially similar respective arc throats formed therein. The respective arc throats progressively decrease in size from group to group along the length of the arc stack in a direction extending away from the closed position of the blade. A connecting support maintains the plurality of arc plates substantially parallel to one another.

Abstract translation: 用于接收可在闭合位置和打开位置之间运动的断路器叶片的电弧堆叠包括彼此大致平行并且布置在多个相邻组中的多个弧形板。 每个组包括一个或多个弧形板，其中形成有基本相似的相应的弧形喉部。 相应的弧形喉部在远离叶片的关闭位置的方向上沿着弧堆叠的长度逐渐地逐渐地减小尺寸。 连接支撑件将多个弧形板基本保持彼此平行。

公开(公告)号：US5502611A

公开(公告)日：1996-03-26

申请号：US323407

申请日：1994-10-14

Applicant: Barry Rodgers

Inventor： Barry Rodgers

IPC: H02H3/253 ,  H02H7/09 ,  H02H3/46

CPC classification number: H02H3/253 ,  H02H7/09

Abstract: A circuit for detecting phase imbalance in a three phase electrical system. The circuit includes a three phase current transformer or three separate current transformers for monitoring the current flowing in each phase of a three phase electrical system. The current transformers provide an induced current proportional to the monitored current. The induced current passes through a full-wave bridge rectifier which produces a voltage output proportional to the induced current. This voltage signal is passed to a two pole Sallen-Key filter which allows a desired signal having a particular frequency range to pass through and blocks the passage of an undesired signal having a particular frequency range. A scaling circuit then receives a portion of the desired signal and produces a scaled average signal which is of a preselected magnitude lower than the desired signal. The scaled average signal and a portion of the desired signal are passed to a comparator/timer which produces an output signal based on a comparison of the desired signal and the scaled average signal. The output signal from the comparator/timer is only produced when the desired signal is lower in value than the scaled average signal and when the timer has determined that the signal is true. When it is determined that the output signal is true, it is sent to an electromechanical trip device which initiates a trip signal to an electrical contactor, thereby interrupting the three phase system.

Abstract translation: 一种用于检测三相电气系统相位不平衡的电路。 该电路包括三相电流互感器或三个单独的电流互感器，用于监测在三相电气系统的每个相中流动的电流。 电流互感器提供与监测电流成比例的感应电流。 感应电流通过全波桥式整流器，其产生与感应电流成比例的电压输出。 该电压信号被传递到双极Sallen-Key滤波器，其允许具有特定频率范围的期望信号通过并阻止具有特定频率范围的非期望信号的通过。 然后，缩放电路接收所需信号的一部分，并产生比预期幅度低于期望信号的缩放平均信号。 缩放的平均信号和所需信号的一部分被传送到比较器/定时器，其基于期望信号和缩放的平均信号的比较产生输出信号。 来自比较器/定时器的输出信号仅在所需信号的值低于缩放的平均信号时以及当定时器确定信号为真时产生。 当确定输出信号为真时，它被发送到机电跳闸装置，其启动到电接触器的跳闸信号，从而中断三相系统。

公开(公告)号：US5483371A

公开(公告)日：1996-01-09

申请号：US134768

申请日：1993-10-08

Applicant: Robert P. Farinelli, Jr.

Inventor： Robert P. Farinelli, Jr.

IPC: H04B10/02 ,  H04B10/207 ,  H04J14/02 ,  H04N7/22 ,  H04R27/00 ,  H04B10/24

CPC classification number: H04R27/00 ,  H04N7/22 ,  H04J14/02

Abstract: The present invention provides a distribution system for audio and video services from a centralized source using lightwave signals generated from terminal equipment through an optical carrier to multiple locations in a facility. The terminal equipment reversibly convert audio, video, and control signals from electrical into lightwave signals. The terminal equipment also provide for electrical output at the remote locations with the appropriate format for various audio and video speakers and displays. A controller selects and converts audio communication signal into a standard audio format and directs the signal to the desired remote location in response to the control signal.

Abstract translation: 本发明提供了一种用于从集中式源的音频和视频业务的分配系统，其使用从终端设备通过光学载波生成的光波信号到设施中的多个位置。 终端设备将音频，视频和控制信号从电可逆转换为光波信号。 终端设备还提供远程位置的电气输出，具有适用于各种音频和视频扬声器和显示器的格式。 控制器选择并将音频通信信号转换成标准音频格式，并且响应于控制信号将信号引导到期望的远程位置。

公开(公告)号：USD365030S

公开(公告)日：1995-12-12

申请号：US17155

申请日：1994-01-05

Applicant: Stephen P. Benesh ,  David W. Hasenohrl

Designer： Stephen P. Benesh ,  David W. Hasenohrl

公开(公告)号：US5467286A

公开(公告)日：1995-11-14

申请号：US159398

申请日：1993-11-03

Applicant: Michael W. Pyle ,  Lee D. Wallis

Inventor： Michael W. Pyle ,  Lee D. Wallis

IPC: G01R19/25 ,  G01R21/133 ,  G06F9/445 ,  G06F12/02 ,  G01R19/00

CPC classification number: G06F8/65 ,  G01R19/25 ,  G01R21/133

Abstract: Firmware is downloaded to a metering unit located in a distributed power network carrying a power-related waveform, where the metering unit senses power-related parameters associated with the power-related waveform and generates and transmits data representative thereof. The metering unit is provided with a sector-erasable flash EEPROM having a first section for storing main functionality firmware and a second section for storing boot code. The boot code includes a reset portion for resetting the metering unit and a firmware update section for downloading external firmware to the first section. The firmware update section includes a writing routine for writing the external firmware to the first section. The metering unit is also provided with a volatile RAM. The external firmware is downloaded to the first section of the EEPROM by executing the firmware update section. While executing the firmware update section, the writing routine is copied to the RAM and executed therefrom to write the external firmware to the first section of the EEPROM.

Abstract translation: 固件下载到位于分布式电力网络中的计费单元，该分布式电力网络承载与功率相关的波形，其中计量单元感测与功率相关波形相关联的功率相关参数，并生成并发送表示其的数据。 计量单元设置有扇区可擦除闪存EEPROM，其具有用于存储主功能固件的第一部分和用于存储引导代码的第二部分。 引导代码包括用于重置计量单元的复位部分和用于将外部固件下载到第一部分的固件更新部分。 固件更新部分包括用于将外部固件写入第一部分的写入例程。 计量单元还具有易失性RAM。 通过执行固件更新部分将外部固件下载到EEPROM的第一部分。 在执行固件更新部分时，写入例程被复制到RAM并由其执行以将外部固件写入EEPROM的第一部分。

公开(公告)号：US5455760A

公开(公告)日：1995-10-03

申请号：US901453

申请日：1992-06-19

Applicant: Ron J. Bilas ,  Drew A. Reid

Inventor： Ron J. Bilas ,  Drew A. Reid

IPC: H02B1/24 ,  H01H73/00 ,  H02H3/00 ,  H02J3/00 ,  H02J3/06 ,  H02J13/00 ,  G06F19/00

CPC classification number: H02J3/06 ,  H02H3/00 ,  H02J13/0055 ,  H01H2300/03 ,  Y02B70/3241 ,  Y02B90/224 ,  Y04S20/14 ,  Y04S20/227

Abstract: An energy management loadpanel arrangement includes a loadpanel enclosure having a plurality of circuit breakers, each of which opens and closes in response to a control signal so as to interrupt an associated current path. A microcomputer generates the control signals to control the position of the circuit breakers and their associated current paths. The circuit breakers include a digital code circuit which is manually set to indicate the type of circuit breaker, for example, a one, two or three pole circuit breaker.

Abstract translation: 能量管理装载板装置包括具有多个断路器的装载机壳体，每个断路器响应于控制信号而打开和关闭，以便中断相关联的电流路径。 微型计算机产生控制信号以控制断路器及其相关电流路径的位置。 断路器包括数字代码电路，其被手动设置以指示断路器的类型，例如一个，两个或三极断路器。

公开(公告)号：US5450306A

公开(公告)日：1995-09-12

申请号：US987498

申请日：1992-12-07

Applicant: Luis J. Garces ,  James W. Sember

Inventor： Luis J. Garces ,  James W. Sember

IPC: H02M5/458 ,  H02M7/5387 ,  H02M1/12

CPC classification number: H02M7/53875 ,  H02M5/458 ,  H02M2001/0022 ,  H02M2001/385

Abstract: A closed loop pulse width modulator (PWM) inverter corrects for variations and distortion in the output AC voltage waveform caused by non-linearities of the switching devices or changes in the DC link voltage. A signal is generated that is a volt-seconds representation of the voltage error between a voltage command and the actual AC output voltage of the PWM inverter. The volt-seconds error signal becomes a controlling means in the closed loop of the PWM inverter to regulate the output AC voltage of the PWM inverter. Another signal that represents changes in the DC link voltage also modifies the voltage command signal. The system will compensate for the non-linear behavior of the PWM inverter due to deadtime, minimum on-times and off-times, and DC link voltage variations and voltage drops across the switching devices, and will also allow the operation of the inverter in a linear fashion for the region of operation when one or more of its phases are saturated, i.e., either full on or full off.

Abstract translation: 闭环脉宽调制器（PWM）逆变器校正由开关器件的非线性或直流母线电压变化引起的输出交流电压波形的变化和失真。 产生一个信号，该信号是电压指令与PWM逆变器的实际交流输出电压之间的电压误差的伏秒表示。 伏秒误差信号成为PWM逆变器闭环控制装置，用于调节PWM逆变器的输出交流电压。 代表DC链路电压变化的另一个信号也修改了电压指令信号。 该系统将补偿PWM逆变器由于死区时间，最小导通时间和关断时间以及直流链路电压变化和开关器件两端的电压降而导致的非线性特性，并且还可以使逆变器工作在 当其一个或多个相饱和时，即完全开启或关闭时，对于操作区域的线性方式。

公开(公告)号：US5448491A

公开(公告)日：1995-09-05

申请号：US215435

申请日：1994-03-21

Applicant: Donald R. Janke ,  James A. Rodrian

Inventor： Donald R. Janke ,  James A. Rodrian

IPC: G01R27/18 ,  G01R31/42 ,  G01R19/00

CPC classification number: G01R31/42 ,  G01R27/18

Abstract: A line isolation monitor (LIM) indicates the maximum hazard current of an ungrounded polyphase power distribution system. The LIM is microcontroller based and continuously monitors a fault impedance of the distribution system. The fault impedance is determined by the LIM by injecting a continuous sine wave measurement current into a ground terminal to generate a measurement voltage across the fault impedance. Using the measurement voltage and current, the LIM calculates the fault impedance and, using this impedance, calculates the hazard current based on the maximum line to ground voltage of the ungrounded system. The hazard current is displayed and if it exceeds a predetermined threshold, the LIM will provide audio and visual alarms. A serial communications channel allows the LIM to communicate with other intelligent devices. The LIM has means for self-calibration and self-testing while on-line and during a power-up sequence. Line frequency is also determined by the LIM. Two LIMs can be used to monitor the same distribution system at the same time without interfering with each other.

Abstract translation: 线路隔离监视器（LIM）表示未接地多相配电系统的最大危险电流。 LIM是基于微控制器的，并持续监控配电系统的故障阻抗。 故障阻抗由LIM通过将连续的正弦波测量电流注入接地端子来产生故障阻抗上的测量电压来确定。 使用测量电压和电流，LIM计算故障阻抗，并使用该阻抗，根据未接地系统的最大线对地电压来计算危险电流。 显示危险电流，如果超过预定阈值，LIM将提供音频和视觉报警。 串行通信通道允许LIM与其他智能设备进行通信。 LIM具有自动校准和自检功能，可在线和上电时进行。 线路频率也由LIM决定。 两个LIM可以同时监视相同的分配系统，而不会相互干扰。