公开(公告)号：US20140354302A1

公开(公告)日：2014-12-04

申请号：US13907551

申请日：2013-05-31

Applicant: General Electric Company

Inventor： Dan Tho Lu ,  Prabhakar Neti

IPC: G01R19/00 ,  G01R27/26

CPC classification number: G01R19/0084 ,  G01R15/16 ,  G01R27/2605

Abstract: A system including a non-intrusive capacitive voltage sensor configured to couple to an insulator surrounding a metal conductor, wherein the non-intrusive capacitive voltage sensor is configured to produce a voltage signal indicative of a voltage in the metal conductor, and a monitor-controller system configured to receive the voltage signal from the non-intrusive capacitive voltage sensor, wherein the monitor-controller system is configured to use the voltage signal to monitor or control a machine.

Abstract translation: 一种包括非入侵电容性电压传感器的系统，其被配置为耦合到围绕金属导体的绝缘体，其中所述非侵入式电容性电压传感器被配置为产生指示所述金属导体中的电压的电压信号，以及监视器控制器 系统，其被配置为从非侵入式电容性电压传感器接收电压信号，其中所述监视器 - 控制器系统被配置为使用所述电压信号来监视或控制机器。

公开(公告)号：US20140303913A1

公开(公告)日：2014-10-09

申请号：US13858277

申请日：2013-04-08

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Prabhakar Neti ,  Pinjia Zhang ,  Stefan Grubic

IPC: G01R31/34

CPC classification number: G01R31/34 ,  G01R31/343 ,  H02P29/0241

Abstract: A method for detection of rotor bar faults in an electric machine is provided. The method includes acquiring electrical signals from the electric machine that are representative of the operative condition of the machine. The symmetrical components from the electrical signals are eliminated by squaring an instantaneous value of each data point from the electrical signals and summing the squared values. The method further includes the step of eliminating discontinuities in the electrical signals by applying a window function to compute weighted representation of the squared values. Furthermore, the method includes the step of normalizing the weighted representation to obtain spectral information. The faults in the rotor bar are detected by analyzing the spectral information obtained after normalization.

Abstract translation: 提供了一种用于检测电机中转子条故障的方法。 该方法包括从电机获取代表机器操作状态的电信号。 通过从电信号中平均每个数据点的瞬时值并对平方值求和来消除来自电信号的对称分量。 该方法还包括通过应用窗口函数来计算平方值的加权表示来消除电信号中的不连续性的步骤。 此外，该方法包括归一化加权表示以获得光谱信息的步骤。 通过分析归一化后获得的光谱信息来检测转子条中的故障。

公开(公告)号：US20140167810A1

公开(公告)日：2014-06-19

申请号：US13716969

申请日：2012-12-17

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Prabhakar Neti ,  Pinjia Zhang

IPC: G01R31/34

CPC classification number: G01R31/34 ,  G01M13/045 ,  G01R31/343

Abstract: A method implemented using a controller based device includes receiving a measured electrical signal from an electrical device of an electromechanical device and receiving a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device. The method further includes determining a first signal signature based on the measured electrical signal and determining a second signal signature based on the measured vibration signal. The method also includes determining a diagnostic parameter based on the first signal signature and the second signal signature and determining a fault in the mechanical device based on the diagnostic parameter.

Abstract translation: 使用基于控制器的设备实现的方法包括从机电装置的电气装置接收测量的电信号，并接收来自耦合到电气装置的机电装置的机械装置的测量的振动信号。 该方法还包括基于所测量的电信号确定第一信号签名并基于所测量的振动信号确定第二信号签名。 该方法还包括基于第一信号签名和第二信号签名来确定诊断参数，并且基于诊断参数来确定机械设备中的故障。