Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System
    72.
    发明申请
    Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System 审中-公开
    评估电机驱动机械系统状态的方法与装置

    公开(公告)号:US20070282548A1

    公开(公告)日:2007-12-06

    申请号:US10592391

    申请日:2005-03-09

    IPC分类号: G01R27/16

    摘要: Conditions of a mechanical system driven (12) by a motor (14) can be assessed by monitoring an admittance or impedance at an input to the motor (14) over a period of time. The admittance or impedance may be determined by measuring the input voltage (22) and current (20). Variations in admittance or impedance are associated with known conditions including faults. An analyser (24) processes the admittance or impedance and provides a warning signal if a known fault condition is determined. The processing may be done using a neural processor.

    摘要翻译: 可以通过在一段时间内监测在电动机(14)的输入处的导纳或阻抗来评估由电动机(14)驱动(12)的机械系统的条件。 可以通过测量输入电压(22)和电流(20)来确定导纳或阻抗。 导纳或阻抗的变化与包括故障在内的已知条件相关。 分析器(24)处理导纳或阻抗,并且如果确定了已知的故障状况,则提供警告信号。 可以使用神经处理器来进行处理。

    Method for measuring resistance for a subscriber line interface circuit using a protective circuit
    73.
    发明申请
    Method for measuring resistance for a subscriber line interface circuit using a protective circuit 有权
    使用保护电路测量用户线接口电路的电阻的方法

    公开(公告)号:US20050238165A1

    公开(公告)日:2005-10-27

    申请号:US11089044

    申请日:2005-03-24

    CPC分类号: H04M1/24

    摘要: The invention relates to a method for ascertaining a resistance value (Z) between a first contact (2) and a second contact (3) in a subscriber line interface circuit (4), where a protective circuit (9) for protecting the subscriber line interface circuit (4) against overvoltages is provided between the two contacts (2, 3) and comprises a parallel circuit containing a protective capacitor (5) with two resistors (7, 8) connected in series via a node (K), the node (K) being connected to a third contact (10) in the subscriber line interface circuit (4), where the method has the following steps: a predetermined charging voltage (UCharge) is applied to the protective capacitor (5); a threshold voltage (UTH) is calculated on the basis of the resistance values (R1, R2) of the two resistors (7, 8) and the applied charging voltage (UCharge); a measured voltage (UM) tapped off across one of the two resistors (7, 8) is measured while the protective capacitor (5) is discharging; the measured voltage (UM) is compared with the calculated threshold voltage (UTH); a period (Δt) between the start of the discharging of the protective capacitor (5) and the time at which the measured voltage (UM) is the same as the threshold voltage (UTH) is ascertained; and the resistance value (Z) is calculated using the ascertained period (Δt) and the resistance values (R1, R2) of the two resistors (7, 8).

    摘要翻译: 本发明涉及一种用于确定用户线接口电路(4)中的第一接触(2)和第二接触(3)之间的电阻值(Z)的方法,其中保护电路(9)用于保护用户线路 在两个触点(2,3)之间设置有过电压的接口电路(4),并且包括一个并联电路,该并联电路包含一个保护电容器(5),其中两个电阻器(7,8)经由节点(K)串联连接, (K)连接到所述用户线路接口电路(4)中的第三接点(10),其中所述方法具有以下步骤:将预定充电电压(U SUB充电)施加到所述保护 电容器(5); 基于两个电阻器(7)的电阻值(R 1,N 2,R 2)来计算阈值电压(U TH TH) ,8)和施加的充电电压(U SUB充电); 在保护电容器(5)放电的同时测量在两个电阻器(7,8)中的一个上分接的测量电压(U M M); 将测量的电压(U SUB M)与计算的阈值电压(U TH TH)进行比较; 在保护电容器(5)的放电开始和测量电压(U SUB M)之间的时间与阈值电压(U TH)相同的时间段(Deltat) ); 并且使用确定的周期(Deltat)和两个电阻器(7,8)的电阻值(R 1,R 2,R 2)来计算电阻值(Z) 。

    Method and apparatus for measuring a parameter of a vehicle electrical system
    75.
    发明申请
    Method and apparatus for measuring a parameter of a vehicle electrical system 有权
    用于测量车辆电气系统的参数的方法和装置

    公开(公告)号:US20050052187A1

    公开(公告)日:2005-03-10

    申请号:US10656526

    申请日:2003-09-05

    申请人: Kevin Bertness

    发明人: Kevin Bertness

    IPC分类号: G01R27/16 G01R31/00 G01R31/02

    摘要: An apparatus for measuring electrical parameters for an electrical system measures a first and second parameters of the electrical system between connections to the electrical system. A processor determines a third electrical parameter of the electrical system as a function of the first parameter and the second parameter.

    摘要翻译: 用于测量电气系统的电参数的装置测量在与电气系统的连接之间的电气系统的第一和第二参数。 处理器根据第一参数和第二参数确定电气系统的第三电参数。

    Method and apparatus for sensing armature position in direct current
solenoid actuators
    76.
    发明授权
    Method and apparatus for sensing armature position in direct current solenoid actuators 失效
    用于感应直流电磁执行机构电枢位置的方法和装置

    公开(公告)号:US5942892A

    公开(公告)日:1999-08-24

    申请号:US944791

    申请日:1997-10-06

    申请人: Long-Jang Li

    发明人: Long-Jang Li

    摘要: An apparatus detects a position of an armature within a solenoid coil by superimposing a fixed frequency sensing signal onto the coil driver signal. The combined signal is applied to the solenoid coil and an alternating current component varies with changes in inductance of the solenoid coil that result from position changes of the armature. A current sensor produces an output signal indicating a level of current flowing through the solenoid coil and a filter extracts the alternating component of that output signal that results from the sensing signal. A position circuit determines the position of the armature from an output from the filter.

    摘要翻译: 装置通过将固定频率感测信号叠加在线圈驱动器信号上来检测电枢在螺线管线圈内的位置。 组合的信号被施加到螺线管线圈,并且交流分量随着电枢的位置变化导致的螺线管线圈的电感的变化而变化。 电流传感器产生指示流过螺线管线圈的电流水平的输出信号,并且滤波器提取由感测信号产生的该输出信号的交替分量。 位置电路从过滤器的输出确定衔铁的位置。

    Stator turn fault detector for AC motor
    78.
    发明授权
    Stator turn fault detector for AC motor 失效
    交流电机定子转向故障检测器

    公开(公告)号:US5514978A

    公开(公告)日:1996-05-07

    申请号:US407550

    申请日:1995-03-20

    摘要: Motor current and voltage waveforms are measured and converted to digitized current and voltage waveforms. A weighted discrete fourier transform is applied to the digitized current and voltage waveforms to obtain negative sequence current and voltage phasors; and the negative sequence current and voltage phasors are used to determine the existence of a turn fault. The use of the negative sequence current and voltage phasors can be performed by employing one of several techniques. In a first embodiment, an apparent negative sequence impedance is estimated by dividing the negative sequence voltage phasor by the negative sequence current phasor for comparison with a threshold negative sequence impedance. In a second, related embodiment, a current differential is estimated by dividing the negative sequence voltage phasor by a characteristic negative sequence impedance and subtracting the result from the negative sequence current phasor for comparison with a threshold current differential. In a third, related embodiment, a voltage differential is estimated by multiplying the negative sequence current phasor by a characteristic negative sequence impedance and subtracting the result from the negative sequence voltage phasor for comparison with a threshold voltage differential. In either of the second or third embodiments, the characteristic negative sequence impedance can be obtained by inserting a calibration device into one phase of the motor.

    摘要翻译: 电机电流和电压波形被测量并转换为数字化的电流和电压波形。 加权离散傅里叶变换应用于数字化电流和电压波形,以获得负序电流和电压相量; 负序电流和电压相量用于确定转向故障的存在。 可以通过采用几种技术之一来执行负序电流和电压相量的使用。 在第一实施例中,通过将负序电压相量除以负序电流相量来估计表观负序阻抗,以便与阈值负序阻抗进行比较。 在第二个相关实施例中,通过将负序电压相量除以特性负序阻抗并从负序电流相量中减去结果与阈值电流差来比较来估计电流差。 在第三个相关实施例中,通过将负序电流相量乘以特性负序阻抗并从负序电压相量中减去与阈值电压差相比较的结果来估计电压差。 在第二或第三实施例中的任一个中,可以通过将校准装置插入到电动机的一相中来获得特征负序阻抗。

    Impedance meter capable of performing measurements at high precision
over wide impedance and frequency ranges
    80.
    发明授权
    Impedance meter capable of performing measurements at high precision over wide impedance and frequency ranges 失效
    阻抗计能够在高阻抗和频率范围内以高精度进行测量

    公开(公告)号:US5345182A

    公开(公告)日:1994-09-06

    申请号:US965795

    申请日:1992-10-23

    申请人: Hideki Wakamatsu

    发明人: Hideki Wakamatsu

    CPC分类号: G01R27/06 G01R27/08

    摘要: A system for measuring a broad range of impedance values with high precision and over a broad frequency band. Both the broadrange impedance measurement capability of the V-I method and the broadband frequency measuring capability of the reflection coefficient method are provided. A remote measurement capability is also available. Based upon the V-I method, a selection is made between a circuit to achieve an ideal open and a circuit to achieve an ideal short circuit in response to the impedance values. A boundary for selecting the impedance is, for instance, 50.OMEGA.. To measure a high impedance, the ideal open type circuit is selected; to measure a low impedance, the ideal short circuit is selected. The source and measuring instruments are extended by a coaxial cable. A floating measuring instrument is obtained by using a balun. Impedance measurements for 1 MHz to 2 GHz are possible.

    摘要翻译: 一种用于以高精度和宽频带测量宽范围的阻抗值的系统。 提供V-I方法的广泛阻抗测量能力和反射系数法的宽带频率测量能力。 还提供远程测量功能。 基于V-I方法,在实现理想开路的电路和响应于阻抗值实现理想短路的电路之间进行选择。 用于选择阻抗的边界例如是50欧米茄。 为了测量高阻抗,选择理想的开路型电路; 为了测量低阻抗,选择理想的短路。 源和测量仪器由同轴电缆延伸。 通过使用平衡 - 不平衡转换器可获得浮动测量仪器。 1 MHz至2 GHz的阻抗测量是可能的。