专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明申请

US20140142874A1 HOME RUN ARC DETECTION AT THE PHOTOVOLTAIC STRING LEVEL USING MULTIPLE CURRENT SENSORS 有权
标题翻译：使用多个电流传感器在光伏级别的家庭运行弧检测
公开(公告)号：US20140142874A1
公开(公告)日：2014-05-22
申请号：US13836345
申请日：2013-03-15
申请人： Lee Martin , Jianhong Kang , Christian V. Pellon , Keith W. Kawate
发明人： Lee Martin , Jianhong Kang , Christian V. Pellon , Keith W. Kawate
IPC分类号： G01R31/40
CPC分类号： H02H3/445 , G01R31/1227 , G01R31/40 , G06F19/00 , H02H1/0015 , H02S50/10
摘要： Systems and methods of detecting arcing in DC power systems that can differentiate between DC arcs and load-switching noise. The systems and methods can determine, within a plurality of predetermined time intervals, at least the pulse count (PC) per predetermined time interval, and the pulse duration (PD) per predetermined time interval, in which the PC and the PD can correspond to the number and the intensity of potential arcing events in a DC power system, respectively. The systems and methods can process the PC and PD using one or more arc fault detection algorithms, thereby differentiating between DC arcs and load-switching noise with increased reliability.
摘要翻译：在DC电力系统中检测电弧的系统和方法可以区分直流电弧和负载开关噪声。系统和方法可以在多个预定时间间隔内至少确定每个预定时间间隔的脉冲计数（PC）和每个预定时间间隔的脉冲持续时间（PD），其中PC和PD可对应于分别在直流电力系统中的电弧放电事件的数量和强度。系统和方法可以使用一个或多个电弧故障检测算法对PC和PD进行处理，从而在可靠性提高的情况下区分直流电弧和负载切换噪声。

22. 发明授权

US07898781B2 Arc fault detection apparatus employing a comparator with a continuously variable threshold 有权
标题翻译：电弧故障检测装置采用具有连续可变阈值的比较器
公开(公告)号：US07898781B2
公开(公告)日：2011-03-01
申请号：US12184297
申请日：2008-08-01
申请人： Keith W. Kawate , Lynwald Edmunds , Roger D. Mayer
发明人： Keith W. Kawate , Lynwald Edmunds , Roger D. Mayer
IPC分类号： H02H3/05 , H02H3/08 , H02H3/38
CPC分类号： H02H1/0015 , H02H3/006
摘要： An arc fault detection apparatus that provides for better discrimination of electrical arcing events from nuisance loads. The arc fault detection apparatus includes an arcing sense circuit having a comparator circuit with a variable threshold voltage that varies continuously with the line voltage. The arc fault detection apparatus has reduced susceptibility to nuisance tripping in the presence of sudden changes in the load current that occur outside of a specified time window centered on each zero crossing point of the line voltage.
摘要翻译：一种电弧故障检测装置，其能够更好地区分来自妨扰负载的电弧事件。电弧故障检测装置包括具有可变阈值电压的比较器电路的电弧感测电路，其随线电压连续变化。在存在以线路电压的每个过零点为中心的规定时间窗外的负载电流的突然变化的情况下，电弧故障检测装置降低了对妨碍跳闸的敏感性。

23. 发明授权

US06980407B2 Arc detection apparatus and method 失效
标题翻译：电弧检测装置及方法
公开(公告)号：US06980407B2
公开(公告)日：2005-12-27
申请号：US10314715
申请日：2002-12-09
申请人： Keith W. Kawate , Christian V. Pellon
发明人： Keith W. Kawate , Christian V. Pellon
IPC分类号： H02H3/22 , H01H83/02 , H01H83/04 , H01H83/20 , H02H1/00 , H02H1/04 , H02H3/50 , H02H3/00
CPC分类号： H02H1/0015 , H02H1/04
摘要： Current flowing through a load is monitored by a transformer (Tr1) having a small mutual inductance. The secondary coil is shorted through a rectifier circuit to deliver a charge which, in a first preferred embodiment, is connected to a log charge translator circuit comprising matching diodes (D9, D7 and D10, D8) and a capacitor (C2) to provide a capacitor voltage proportional to the log of the charge delivered through the rectifier circuit. The capacitor is reset after each measurement. In a modified embodiment, the log translator circuit comprises a pair of transistors (T1, T2) and a capacitor (C2). According to the preferred embodiments, two measurements of the capacitor voltage are taken each half cycle at a time determined by the absolute value of the line voltage. The measurements per half cycle are stored in words in a stack and processed through a three or five cycle algorithm for determining fluctuations which will cancel out disturbances caused by nuisance loads that are repetitive or continuously varying. In a described embodiment, a pushdown stack of 60 words is used with fluctuations compared by a microcontroller to a selected limit. Measurements for the last half second of measurements are considered, ignoring the first and last measurement, and when the sum of the fluctuations exceeds the selected limit an arc is indicated and a circuit interrupter is tripped. A self test button is connected to the microcontroller which, when depressed, results in charging of the capacitor to stimulate the detection of an arc.
摘要翻译：流过负载的电流由具有小互感的变压器（Tr 1）监测。次级线圈通过整流电路短路以传送电荷，其在第一优选实施例中连接到包括匹配二极管（D 9，D 7和D 10，D 8）和电容器（C）的对数电荷转换器电路 2）提供与通过整流电路传送的电荷的对数成比例的电容器电压。每次测量后电容器复位。在修改实施例中，对数转换器电路包括一对晶体管（T 1，T 2）和电容器（C 2）。根据优选实施例，在由电压绝对值确定的时间内每半个周期进行电容器电压的两次测量。每半周期的测量结果以堆叠中的字存储，并通过三或五周期算法进行处理，用于确定将消除由重复或连续变化的扰动负载引起的干扰的波动。在所描述的实施例中，使用60个字的下推叠，其中微控制器的波动与所选极限相比较。考虑最后一半测量的测量，忽略第一次和最后一次测量，并且当波动的总和超过所选择的极限时，指示电弧并且电路断路器跳闸。自检按钮连接到微控制器，当被按压时，微控制器导致电容器的充电以刺激电弧的检测。

24. 发明授权

US06765391B2 Low cost asic architecture for safety critical applications monitoring an applied stimulus 有权
标题翻译：用于监控应用刺激的安全关键应用的低成本asic架构
公开(公告)号：US06765391B2
公开(公告)日：2004-07-20
申请号：US10277797
申请日：2002-10-22
申请人： David L. Corkum , Keith W. Kawate , Thomas R. Maher
发明人： David L. Corkum , Keith W. Kawate , Thomas R. Maher
IPC分类号： G01R2702
CPC分类号： G01R17/10
摘要： An ASIC (14, 14′, 14″) conditions two independent outputs (VINM, VINP) of a full Wheatstone piezoresistive bridge (12) in separate conditioning paths. Each path is provided with a bridge supply voltage (VHB1, VHB2) which can serve as a temperature related input signal to respective offset and gain compensation control circuits. The half bridge outputs are inputted to respective amplifiers (U1, U2) along with a selected percentage of the temperature dependent bridge supply voltage. The outputs of the amplifiers provide a signal proportional to respective half bridge output voltage. In one embodiment, the output of the amplifier (U2) in one conditioning path of one half bridge is connected to the input of an amplifier (U4) in the other conditioning path to provide a signal in the one path proportional to the Wheatstone bridge differential output voltage and in the other path a signal proportional to the Wheatstone half bridge output voltage. In another embodiment, the temperature dependent bridge supply voltage is multiplexed for a selected time upon power-up to an amplifier (U5) which normally receives an input from one of the bridge outputs.
摘要翻译：在独立的调节路径中，ASIC（14,14'，14“）在完整的惠斯登压阻电桥（12）处理两个独立的输出（VINM，VINP）。每个路径都有一个桥接电源电压（VHB1，VHB2），它可以作为相关偏移和增益补偿控制电路的温度相关输入信号。半桥输出与温度依赖电桥电源电压的选定百分比一起输入到相应的放大器（U1，U2）。放大器的输出提供与各个半桥输出电压成比例的信号。在一个实施例中，在一个半桥的一个调节路径中的放大器（U2）的输出连接到另一个调节路径中的放大器（U4）的输入，以在与惠斯通电桥差分成比例的一个路径中提供信号输出电压和另一路径上的信号成比例的惠斯通半桥输出电压。在另一个实施例中，在上电至通常从桥接输出之一接收输入的放大器（U5）时，依赖于温度的电桥电压被复用一段选定的时间。

25. 发明授权

US06433554B1 Method and apparatus for in-range fault detection of condition responsive sensor 有权
标题翻译：状态响应传感器的范围内故障检测方法和装置
公开(公告)号：US06433554B1
公开(公告)日：2002-08-13
申请号：US09468260
申请日：1999-12-20
申请人： Keith W. Kawate , David L. Corkum , Thomas R. Maher
发明人： Keith W. Kawate , David L. Corkum , Thomas R. Maher
IPC分类号： G01R3100
CPC分类号： G01D18/00 , G01D3/022 , G01D3/08
摘要： An in-range fault detection system for a full wheatstone bridge element (12) having piezoresistive elements (R1, R2, R3, R4) has bridge outputs (INP, INM) connected to measuring means in the form of a first circuit portion (13) to provide a common mode voltage (VCM). A second circuit portion (14) is used to provide a centering voltage (C*VBRG) equal to the common mode voltage at the time of sensor calibration and a third circuit portion (15) is used to provide a small window voltage (W*VBRG) which is a fraction of bridge voltage. The value (W*VBRG) is subtracted from (C*VBRG) at a first summing circuit (SUM1) and added to (C*VBRG) at a second summing circuit (SUM2) and the results are each compared to the common mode voltage by comparators (Q1, Q2) which are then determined to be within or without a window of valid values by an OR gate (Q3).
摘要翻译：具有压阻元件（R1，R2，R3，R4）的全惠斯登电桥元件（12）的范围内故障检测系统具有连接到第一电路部分（13）形式的测量装置的桥接输出（INP，INM））以提供共模电压（VCM）。第二电路部分（14）用于在传感器校准时提供等于共模电压的定心电压（C * VBRG），并且第三电路部分（15）用于提供小窗口电压（W * VBRG），这是桥电压的一小部分。在第一求和电路（SUM1）从（C * VBRG）中减去值（W * VBRG），并在第二求和电路（SUM2）将其加到（C * VBRG），并将结果与共模电压通过比较器（Q1，Q2），然后通过OR门（Q3）将其确定为在或不具有有效值的窗口内。

26. 发明授权

US5824902A Condition responsive sensor having a signal conditioning capacitor 失效
标题翻译：具有信号调理电容器的状态响应传感器
公开(公告)号：US5824902A
公开(公告)日：1998-10-20
申请号：US723434
申请日：1996-09-30
申请人： David L. Corkum , June Park , Keith W. Kawate
发明人： David L. Corkum , June Park , Keith W. Kawate
IPC分类号： G01P1/02 , G01P15/125
CPC分类号： G01P1/023 , G01P15/125
摘要： A first embodiment of a condition responsive capacitive transducer, such as an accelerometer (1), is shown in which an electrically conductive sensor element (14) is sandwiched between upper (10) and lower (12) electrically insulative planar substrates and mounted in sealed, spaced apart relation by patterns (16) of adhesive containing spacing elements. A second embodiment (100) includes a signal conditioning capacitor having plate portions (114r, 120b and 114s, 120c) on either side of a condition responsive capacitor to minimize errors caused by translational movement of the sensor element (114) relative to the substrates (110, 112). Circuit conditioning electronics (124) is shown mounted directly on one of the substrates (110) and the sensor is mountable directly on a circuit board. A third embodiment (200) shows differential capacitors (224, 226, 228, 230, 232, 234) for minimizing errors due to misalignment of the movable element (114) with respect to the fixed supports (210, 212). Another embodiment provides a material system for use in condition responsive capacitive transducers having refractory metal for a sensing element and glass material for a supporting substrate.
摘要翻译：示出了诸如加速度计（1）的状态响应电容换能器的第一实施例，其中导电传感器元件（14）夹在上（10）和下（12）电绝缘平面基板之间并且被安装在密封，通过包含间隔元件的粘合剂的图案（16）间隔开关系。第二实施例（100）包括信号调理电容器，其在状态响应电容器的任一侧具有板部分（114r，120b和114s，120c），以最小化由传感器元件（114）相对于基板的平移运动引起的误差 110,112）。示出了电路调节电子设备（124）直接安装在一个基板（110）上，并且传感器可直接安装在电路板上。第三实施例（200）示出了用于最小化由于可移动元件（114）相对于固定支撑件（210,212）的未对准而引起的误差的差分电容器（224,226,228,230,232,234）。另一个实施例提供了一种材料系统，用于在具有用于传感元件的难熔金属和支撑衬底的玻璃材料的状态响应电容式换能器中使用。

27. 发明授权

US5536980A High voltage, high current switching apparatus 失效
标题翻译：高电压，大电流开关装置
公开(公告)号：US5536980A
公开(公告)日：1996-07-16
申请号：US978557
申请日：1992-11-19
申请人： Keith W. Kawate , John J. Chrupcala , Eric K. Larson , Thomas R. Maher
发明人： Keith W. Kawate , John J. Chrupcala , Eric K. Larson , Thomas R. Maher
IPC分类号： H01H9/54 , H01H85/46 , H01H9/30
CPC分类号： H01H9/547 , H01H2009/544 , H01H2085/0283 , H01H85/46 , H01H9/542 , Y10T307/766 , Y10T307/878
摘要： A high voltage, high current DC switch is shown having a single pole, double throw relay and a solid state power switch such as an IGBT or MOSFET transistor. Voltage is switched by means of the solid state switch while steady state current is conducted through the relay load contact. Several different protector devices are used in the event of circuit malfunction including a combination of thermal and current fuses and resettable thermostats.
摘要翻译：示出了具有单极，双掷继电器和诸如IGBT或MOSFET晶体管的固态电源开关的高电压，高电流DC开关。当稳态电流通过继电器负载触点传导时，电压通过固态开关切换。在电路故障的情况下，使用几种不同的保护装置，包括热保险丝和电流保险丝以及可复位的恒温器的组合。

28. 发明授权

US5497072A Solid state power controller with power switch protection apparatus 失效
公开(公告)号：US5497072A
公开(公告)日：1996-03-05
申请号：US398248
申请日：1995-03-03
申请人： Norman E. LeComte , Sepideh H. Nott , Keith W. Kawate , Thomas R. Maher
发明人： Norman E. LeComte , Sepideh H. Nott , Keith W. Kawate , Thomas R. Maher
IPC分类号： H02H3/093 , H03K17/08 , H03K17/082 , H03K17/16 , G05F1/575
CPC分类号： H03K17/166 , H02H3/093 , H03K17/0822 , H03K2017/0806
摘要： A solid state power controller for switching power on and off to an electrical load which also serves as a circuit protection device protecting the load and/or the wire connected between the load output terminal of the controller and ground from thermal damage due to current overload is shown. When a current overload exists the controller interrupts current to the load in a time inversely proportional to the square of the magnitude of the overload as shown in a trip time vs load current curve. The controller also limits the load current to a selected maximum level by controlling the drain-source resistance of power MOSFETs used for switching the power. A secondary interrupt is provided in the event that the junction temperature of the MOSFETs has risen a selected maximum level. A thermal memory feature is included for both interrupt signals. The controller is controlled by a single on/off input line and provides both a status and trip output line to indicate its state. The status can be configured to monitor load voltage or load current flow as desired. The controller also can be configured to default to either an on or off state in the event the input line is disconnected.

29. 发明授权

US5303589A Capacitive accelerometer with cantilever mount 失效
标题翻译：带悬臂安装的电容式加速度计
公开(公告)号：US5303589A
公开(公告)日：1994-04-19
申请号：US32212
申请日：1993-03-17
申请人： Eric P. Reidemeister , Steven Beringhause , Keith W. Kawate , Larry K. Johnson
发明人： Eric P. Reidemeister , Steven Beringhause , Keith W. Kawate , Larry K. Johnson
IPC分类号： G01P15/08 , G01P15/125
CPC分类号： G01P15/125 , G01P2015/0828
摘要： An accelerometer has a capacitor detect plate defined on an electrically insulating substrate adjacent a capacitor source plate connector and has circuit paths on the substrate connected to the detect plate and source plate connector. A resilient metal plate has an attachment portion secured to the source plate connector, has a capacitor source plate portion, has integral first beam elements extending away from the attachment portion and has a second beam element extending from the first beam elements back toward the attachment portion to dispose the capacitor source plate in spaced relation to the detect plate to form a capacitor having selected initial capacitance. The capacitor source plate member portion is movable relative to the detect plate to modify device capacitance in response to acceleration. Electronic components are mounted on the substrate connected to the circuit paths to provide an output signal corresponding to the acceleration. Preferably the device is cantilever mounted on a housing base with a part of the device substrate carrying the metal member extending over a housing recess to isolate that device end from thermal stresses in an accelerometer unit.
摘要翻译：加速度计具有限定在与电容器源极板连接器相邻的电绝缘基板上的电容器检测板，并且在连接到检测板和源极板连接器的基板上具有电路路径。弹性金属板具有固定到源板连接器的附接部分，具有电容器源极板部分，具有从附接部分延伸的整体的第一光束元件，并且具有从第一光束元件延伸回附接部分的第二光束元件将电容器源极板与检测板间隔开来形成具有选定初始电容的电容器。电容器源极板构件部分可相对于检测板移动，以响应加速度来修改器件电容。电子部件安装在连接到电路路径的基板上，以提供对应于加速度的输出信号。优选地，装置是悬臂安装在壳体基座上，其中装置基板的一部分承载金属构件，其延伸在壳体凹部上以将该装置端与加速度计单元中的热应力隔离。

30. 发明授权

US5241850A Sensor with programmable temperature compensation 失效
标题翻译：带可编程温度补偿的传感器
公开(公告)号：US5241850A
公开(公告)日：1993-09-07
申请号：US786852
申请日：1991-11-01
申请人： Keith W. Kawate
发明人： Keith W. Kawate
IPC分类号： G01P1/00 , G01P21/00
CPC分类号： G01P1/006 , G01P21/00
摘要： A sensor provides an electrical signal in response to occurrence of a condition and is programmed in accordance with tested temperature characteristics of the sensor to provide selected gain and/or offset in the output signal and to compensate for change in gain and/or offset of the output signal due to change in device temperature.
摘要翻译：传感器响应于条件的发生而提供电信号，并且根据传感器的测试温度特性来编程，以在输出信号中提供所选择的增益和/或偏移量，并补偿所述传感器的增益和/或偏移的变化输出信号由于器件温度的变化而变化。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式