公开(公告)号：US06640196B1

公开(公告)日：2003-10-28

申请号：US09931522

申请日：2001-08-16

申请人： Peter J. Unsworth ,  Dragica Kostic Perovic

发明人： Peter J. Unsworth ,  Dragica Kostic Perovic

IPC分类号： G06F1900

CPC分类号： G01R31/343

摘要： Systems and methodologies are disclosed for detecting faults and adverse conditions associated with electric motors. The method comprises obtaining a current signal associated with the motor, calculating a space vector from the current signal, determining a space vector angular fluctuation from the space vector, and analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor. Systems are disclosed having a diagnostics component adapted to obtain a space vector angular fluctuation from a current signal relating to operation of the motor, and to analyze the space vector angular fluctuation in order to detect at least one fault in the motor.

摘要翻译： 公开了用于检测与电动机相关的故障和不利条件的系统和方法。 该方法包括获得与电动机相关联的电流信号，从当前信号计算空间矢量，从空间矢量确定空间矢量角波动，以及分析空间矢量角波动，以便检测至少一个与 发动机。 公开了具有诊断部件的系统，该诊断部件适于从与电机的操作相关的电流信号获得空间矢量角波动，并且分析空间矢量角波动以便检测电动机中的至少一个故障。

公开(公告)号：US5567994A

公开(公告)日：1996-10-22

申请号：US536894

申请日：1995-09-29

申请人： Gerald W. Davis ,  Shiping Huang ,  Peter J. Unsworth

发明人： Gerald W. Davis ,  Shiping Huang ,  Peter J. Unsworth

IPC分类号： H02J3/01 ,  H02M1/12

CPC分类号： H02J3/1842 ,  Y02E40/22

摘要： A hybrid active filter shunts three-phase power with passive elements tuned to have low impedance at a frequency of harmonic distortion. The passive elements are in series with controlled voltages sources providing cancelling currents to the harmonic currents. Rapid determination of the harmonic currents is provided in real-time through the use of a Park transformation reducing the variables which need to be manipulated. Measured currents as transformed are used to model undistorted current based on an average power consumed by the load. When the undistorted current is subtracted from the actual current, a harmonic current signal is produced that may be used to drive the voltage sources. The time domain method requires rapidly computed running averages and thus may be performed in-between the acquisition of the measured current samples.

摘要翻译： 混合有源滤波器将三相功率与被调谐为在谐波失真频率处具有低阻抗的无源元件分流。 无源元件与控制电压源串联，提供对谐波电流的消除电流。 谐波电流的快速确定通过使用Park变换来实时提供，减少需要操纵的变量。 转换后的测量电流用于根据负载消耗的平均功耗对未失真电流进行建模。 当从实际电流中减去不失真的电流时，产生可用于驱动电压源的谐波电流信号。 时域方法需要快速计算的运行平均值，因此可以在获取测量的当前样本之间进行。

公开(公告)号：US5008608A

公开(公告)日：1991-04-16

申请号：US456910

申请日：1989-12-26

申请人： Peter J. Unsworth ,  John C. Merrison ,  Timothy M. Rowan

发明人： Peter J. Unsworth ,  John C. Merrison ,  Timothy M. Rowan

IPC分类号： H02P1/28 ,  H02P27/02

CPC分类号： H02P27/02

摘要： A three-phase motor is operated by a controller having sets of thyristors which trigger electricity from each phase of a supply to the motor. The controller measures the interval .phi. between the voltage and the current when one phase of the motor makes a zero crossing and measures the interval .gamma. when the thyristors are non-conductive during a half-cycle of the voltage for one phase. A control angle .theta. is calculated according to the equation .theta.=.phi.+K.gamma., where K is a positive number. The control angle .theta. is compared to a reference value to derive an error value. The times at which the thyristors are triggered is controlled in response to the error value. To start the motor, the reference value is gradually decreased to trigger the thyristors progressively earlier during each half cycle of the supply voltage. To stop the motor, the reference value is gradually increased to trigger the thyristors progressively later during each half cycle of the supply voltage.

公开(公告)号：US07389278B2

公开(公告)日：2008-06-17

申请号：US11191127

申请日：2005-07-27

申请人： Peter J. Unsworth ,  Frederick M. Discenzo ,  Vetcha Sarat Babu

发明人： Peter J. Unsworth ,  Frederick M. Discenzo ,  Vetcha Sarat Babu

IPC分类号： G06N5/00

CPC分类号： G06N3/088 ,  F04D15/0077 ,  F04D15/0088 ,  F04D29/669 ,  G01R31/2846 ,  G01R31/343 ,  G06N5/048 ,  Y10S706/904 ,  Y10S706/905 ,  Y10S706/906 ,  Y10S706/907

摘要： A system and method is provided for monitoring the operating condition of a pump by evaluating fault data encoded in the instantaneous current of the motor driving the pump. The data is converted to a frequency spectrum which is analyzed to create a fault signature having fault attributes relating to various fault conditions associated with the pump. The fault signature is then input to a neural network that operates in conjunction with a preprocessing and post processing module to perform decisions and output those decisions to a user interface. A stand alone module is also provided that includes an adaptive preprocessing module, a one-shot unsupervised neural network and a fuzzy based expert system to provide a decision making module that operates with limited human supervision.

摘要翻译： 提供了一种系统和方法，用于通过评估以驱动泵的马达的瞬时电流编码的故障数据来监视泵的运行状态。 数据被转换成频谱，该频谱被分析以创建具有与泵相关的各种故障状况相关的故障属性的故障签名。 然后将故障签名输入到与预处理和后处理模块一起操作的神经网络，以执行决策并将这些决定输出到用户界面。 还提供了一种独立模块，其包括自适应预处理模块，单次无监督神经网络和基于模糊的专家系统，以提供在有限的人力监督下操作的决策模块。

公开(公告)号：US07308322B1

公开(公告)日：2007-12-11

申请号：US09965545

申请日：2001-09-27

申请人： Frederick M. Discenzo ,  Dukki Chung ,  Joseph K. Zevchek ,  Jan Bezdicek ,  Ondrej Flek ,  Bohumir Sladek ,  Petr Tusla ,  Jiri Ryba ,  Sarat Babu Vetcha ,  Peter J. Unsworth ,  Dragica Kostic Perovic ,  Srdjan Perovic ,  Muslum Arkan ,  Kenneth A. Loparo

发明人： Frederick M. Discenzo ,  Dukki Chung ,  Joseph K. Zevchek ,  Jan Bezdicek ,  Ondrej Flek ,  Bohumir Sladek ,  Petr Tusla ,  Jiri Ryba ,  Sarat Babu Vetcha ,  Peter J. Unsworth ,  Dragica Kostic Perovic ,  Srdjan Perovic ,  Muslum Arkan ,  Kenneth A. Loparo

IPC分类号： G05B13/02

CPC分类号： G05B23/0221 ,  G05B23/0229 ,  G05B23/0254

摘要： Systems and methods are disclosed for controlling, diagnosing and prognosing the health of a motorized system. The systems may comprise a diagnostics system, a prognostic system and a controller, wherein the diagnostics system and/or prognostic system employs a neural network, an expert system, and/or a data fusion component in order to assess and/or prognose the health of the motorized system according to one or more attributes associated therewith. The controller may operate the motorized system in accordance with a setpoint and/or a diagnostics signal from the diagnostics system and/or prognostic information. Also disclosed are methodologies for controlling, diagnosing and prognosing the health of a motorized system, comprising operating a motor in the motorized system in a controlled fashion, diagnosing and/or prognosing the health of the motorized system according to a measured attribute associated with the motorized system, wherein the motor may be operated according to a setpoint and/or the diagnostics signal and/or prognosis.

摘要翻译： 公开了用于控制，诊断和预测机动系统的健康的系统和方法。 该系统可以包括诊断系统，预后系统和控制器，其中诊断系统和/或预测系统采用神经网络，专家系统和/或数据融合组件，以评估和/或预测健康 根据与其相关联的一个或多个属性的电动系统。 控制器可以根据来自诊断系统和/或预测信息的设定点和/或诊断信号来操作机动系统。 还公开了用于控制，诊断和预测机动系统的健康的方法，包括以受控的方式操作机动系统中的马达，根据与机动化系统相关联的测量属性诊断和/或预测机动系统的健康 系统，其中马达可以根据设定点和/或诊断信号和/或预后进行操作。

公开(公告)号：US5548197A

公开(公告)日：1996-08-20

申请号：US314019

申请日：1994-09-28

申请人： Peter J. Unsworth ,  Yuan Wang

发明人： Peter J. Unsworth ,  Yuan Wang

IPC分类号： G01P3/48 ,  H02P27/02 ,  H02P3/18

CPC分类号： H02P27/026 ,  G01P3/48

摘要： A method and apparatus to be used with a motor controller for determining the speed of the motor rotor using current zero crossing times of the stator winding currents. An error signal set, consisting of phase angle errors between consecutive zero crossings over a sampling period, is generated and analyzed in a region of interest in either the time or frequency domain, producing a signal frequency, the signal frequency being the frequency of the motor rotor.

摘要翻译： 一种与电动机控制器一起使用的方法和装置，用于使用定子绕组电流的当前零交叉时间来确定电动机转子的速度。 在时域或频域中的感兴趣区域中生成并分析由采样周期之间的连续过零点之间的相位角误差组成的误差信号组，产生信号频率，信号频率为电机频率 转子。

公开(公告)号：US5153489A

公开(公告)日：1992-10-06

申请号：US713428

申请日：1991-06-10

申请人： Peter J. Unsworth ,  Li Chen

发明人： Peter J. Unsworth ,  Li Chen

IPC分类号： G01R19/165 ,  H02P23/00 ,  H02P27/02

CPC分类号： H02P27/02

摘要： An electric induction motor is coupled to a source of alternating current by a thyristor switch. A control circuit triggers the thyristor switch to create conductive and non-conductive states during each cycle of the alternating current. A circuit senses the voltage across the thyristor switch during a non-conductive state. From that sensed voltage and known characteristics of the motor being controlled, the control circuit derives a measurement of the current flowing through the motor in the conductive state of the thyristor switch. One of two different derivation techniques is used depending upon the length of the non-conductive state. The control circuit includes a means for calibrating the derivation of the current measurement for a specific motor.

公开(公告)号：US4767975A

公开(公告)日：1988-08-30

申请号：US894500

申请日：1986-08-04

申请人： Peter J. Unsworth

发明人： Peter J. Unsworth

IPC分类号： H02P1/26 ,  H02P23/00 ,  H02P27/02 ,  H02P5/40

CPC分类号： H02P27/02 ,  H02P23/0077 ,  Y02P80/116

摘要： Many induction motor controllers employ a reference angle relative to the supply voltage which is a target for the phase lag of current behind voltage but the choice of the optimum reference angle for energy saving varies from motor to motor. In the present invention firing signals for thyristors connected between a supply and a motor to be controlled are generated by firing circuits under the control of a microprocessor 18. The firing angle for the thyristors is continuously adjusted according to the phase lag as indicated by supply voltage zero crossings and current sensing circuits, load on the motor, and a signal indicating the tendency of the motor to stall obtained from the back e.m.f. of the motor. Using the said signal can be regarded as equivalent to adjusting the reference angle for the optimum value mentioned above. A procedure for starting a motor and setting the initial value of the reference angle is also described.

摘要翻译： 许多感应电动机控制器采用相对于供电电压的参考角度，电源电压是电流背后电压的相位滞后的目标，但是节能的最佳参考角的选择从电动机到电动机都是不同的。 在本发明中，在微处理器18的控制下，通过点火电路产生连接在待控制电源和电动机之间的晶闸管的点火信号。晶闸管的触发角度根据由电源电压 过零点和电流检测电路，负载在电动机上，以及一个信号，指示从后方电动机获得的电动机失速的趋势 的电机。 使用所述信号可以被认为等于调整上述最佳值的参考角。 还描述了启动电动机和设定参考角度的初始值的过程。