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    SYSTEM AND METHOD OF SPEED DETECTION IN AN AC INDUCTION MACHINE
    1.
    发明申请
    SYSTEM AND METHOD OF SPEED DETECTION IN AN AC INDUCTION MACHINE 有权
    交流感应电机的速度检测系统及方法

    公开(公告)号：US20140009102A1

    公开(公告)日：2014-01-09

    申请号：US14022614

    申请日：2013-09-10

    Applicant: Eaton Corporation

    Inventor： Bin Lu ,  Santosh Kumar Sharma ,  Ting Yan ,  Steven Andrew Dimino

    IPC: H02P27/04

    CPC classification number: H02P27/047 ,  G01P3/48 ,  G01P3/489 ,  H02P21/18 ,  H02P23/14

    Abstract: A system and method for determining rotor speed of an AC induction machine is disclosed. The system is programmed to estimate a rotor speed of the induction machine according to a linear speed estimation algorithm and based on name plate information (NPI) of the induction machine and parameters of the AC induction machine during operation thereof. The rotor speed estimation system is also programmed to estimate a rotor speed of the AC induction machine according to a frequency-domain signal processing algorithm and determine if the rotor speed estimated thereby is valid. If the rotor speed estimated by the frequency-domain signal processing algorithm is valid, then a tuned rotor speed of the AC induction machine is estimated according to the linear speed estimation algorithm and based, in part, on the rotor speed estimated by the frequency-domain signal processing algorithm.

    Abstract translation: 公开了一种用于确定AC感应电机的转子速度的系统和方法。 该系统被编程为根据线速度估计算法并且基于感应电动机的铭牌信息（NPI）以及在其运行期间的AC感应电机的参数来估计感应电机的转子速度。 转子速度估计系统还被编程为根据频域信号处理算法估计AC感应电机的转子速度，并且确定由此估计的转子速度是否有效。 如果通过频域信号处理算法估计的转子速度有效，则根据线速度估计算法估计交流感应电机的调谐转子速度，部分基于由频域信号处理算法估计的转子速度， 域信号处理算法。

    System and method for detecting, localizing, and quantifying stator winding faults in AC motors
    2.
    发明授权
    System and method for detecting, localizing, and quantifying stator winding faults in AC motors 有权

    公开(公告)号：US09933487B2

    公开(公告)日：2018-04-03

    申请号：US14230260

    申请日：2014-03-31

    Applicant: Eaton Corporation

    Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Steven Andrew Dimino

    IPC: G01R31/06 ,  G01R31/34 ,  G01R19/00 ,  H02P29/024

    CPC classification number: G01R31/346 ,  G01R19/0046 ,  H02P29/0243 ,  H02P2207/01

    Abstract: A system and method for detecting, localizing and quantifying stator winding faults in AC electrical machines is disclosed. A diagnostic system configured to detect a stator winding fault in an AC electrical machine includes a processor programmed to receive measurements of three-phase voltages and currents provided to the AC electrical machine from voltage and current sensors associated with the electrical distribution circuit, compute positive, negative and zero sequence components of voltage and current from the three-phase voltages and currents, and calculate a fault severity index (FSI) based on at least a portion of the positive, negative and zero sequence components of voltage and current, wherein calculating the FSI further comprises identifying a voltage gain in one or more phases of the AC electrical machine due to a stator winding fault and localizing the stator winding fault to one or more phases in the AC electrical machine.

    SYSTEM AND METHOD FOR DETECTING, LOCALIZING AND QUANTIFYING EXCESS VOLTAGE DROP IN THREE-PHASE AC CIRCUITS
    3.
    发明申请
    SYSTEM AND METHOD FOR DETECTING, LOCALIZING AND QUANTIFYING EXCESS VOLTAGE DROP IN THREE-PHASE AC CIRCUITS 有权
    用于检测，定位和量化三相交流电路中过电压降的系统和方法

    公开(公告)号：US20150276827A1

    公开(公告)日：2015-10-01

    申请号：US14230238

    申请日：2014-03-31

    Applicant: Eaton Corporation

    Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Xin Zhou ,  Steven Andrew Dimino

    IPC: G01R21/00 ,  G01R25/00

    CPC classification number: G01R31/086 ,  G01R31/088 ,  H02H3/253 ,  H02H3/382 ,  H02J3/26 ,  Y02E40/50 ,  Y04S10/522

    Abstract: A system and method for detecting and localizing excess voltage drop in single or multiple phases of three-phase AC circuits is disclosed. An electrical distribution circuit is provided that includes an input connectable to an AC source, an output connectable to terminals of an electrical machine, the output configured to provide three-phase voltages and currents to the electrical machine, and a diagnostic system configured to detect an excess voltage drop (EVD) in the electrical distribution circuit. The diagnostic system includes a processor that is programmed to receive measurements of the three-phase voltages and currents provided to the electrical machine, compute a negative sequence voltage from the three-phase voltages and currents, determine a localization reference phase angle for each phase based in part on the three-phase voltages and currents, and calculate an EVD in the electrical distribution circuit based on the negative sequence voltage and the localization reference phase angles.

    Abstract translation: 公开了用于检测和定位三相AC电路的单相或多相过剩电压降的系统和方法。 提供了一种配电电路，其包括可连接到AC电源的输入端，可连接到电机端子的输出端，所述输出被配置为向所述电机提供三相电压和电流;以及诊断系统，被配置为检测 配电电路中的过电压降（EVD）。 诊断系统包括处理器，其被编程为接收提供给电机的三相电压和电流的测量值，从三相电压和电流计算负序电压，确定每相基于的定位参考相位角 部分地基于三相电压和电流，并且基于负序电压和定位参考相位角计算配电电路中的EVD。

    System and method for detecting excess voltage drop in three-phase AC circuits
    5.
    发明授权
    System and method for detecting excess voltage drop in three-phase AC circuits 有权
    用于检测三相交流电路中过剩电压降的系统和方法

    公开(公告)号：US08963556B2

    公开(公告)日：2015-02-24

    申请号：US13873326

    申请日：2013-04-30

    Applicant: Eaton Corporation

    Inventor： Santosh Kumar Sharma ,  Xin Zhou ,  Steven Andrew Dimino ,  Supriya Karnani ,  Snehal Kale ,  Rahul Choudhary ,  Debsubhra Chakraborty

    IPC: G01R31/08 ,  G01R31/02 ,  H02H3/33

    CPC classification number: G01R31/024 ,  G01R31/026 ,  G01R31/088 ,  G01R31/343 ,  H02H3/33 ,  H02H3/44 ,  H02H5/10 ,  H02H7/228

    Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components. The processor is also programmed to extract a compensated negative sequence current from the negative sequence current component, add the compensated negative sequence current to the positive sequence current to determine fault reference current phasors, determine a negative current reference phase angle for each phase based in part on a phase angle of the positive sequence current, and identify an EVD fault in the electrical distribution circuit based on the compensated negative sequence current, the fault reference current phasors, and the negative current reference phase angles.

    Abstract translation: 用于检测三相配电电路中的过电压降（EVD）的系统和方法包括诊断系统，其包括被编程为接收提供给电机端子的三相电压和电流的处理器， 提供给端子的三相电压和电流，并从基本分量计算正，负和零序电流。 处理器还被编程为从负序电流分量提取补偿的负序电流，将补偿的负序电流加到正序电流以确定故障参考电流相量，部分地基于每个相确定负电流参考相位角 在正序电流的相位角上，基于补偿的负序电流，故障参考电流相量和负电流参考相位角来识别配电电路中的EVD故障。

    PIECEWISE ESTIMATION OF NEGATIVE SEQUENCE VOLTAGE FOR FAULT DETECTION IN ELECTRICAL SYSTEMS
    7.
    发明申请
    PIECEWISE ESTIMATION OF NEGATIVE SEQUENCE VOLTAGE FOR FAULT DETECTION IN ELECTRICAL SYSTEMS 审中-公开

    公开(公告)号：US20180321320A1

    公开(公告)日：2018-11-08

    申请号：US15586809

    申请日：2017-05-04

    Applicant: Eaton Corporation

    Inventor： Abhilash Pani ,  Santosh Kumar Sharma

    IPC: G01R31/34 ,  G01R29/26 ,  G01R19/165 ,  G01R19/00

    CPC classification number: G01R31/346 ,  G01R19/0053 ,  G01R19/165 ,  G01R29/26 ,  H02P29/024 ,  H02P29/0241

    Abstract: A diagnostic system configured to detect a stator winding fault in an electrical machine comprising a plurality of stator windings is provided. The diagnostic system includes a processor programmed to receive measurements of three-phase voltages and currents provided to the electrical machine, compute positive, negative, and zero sequence components of voltage and current from the three-phase voltages and currents, and identify a noise factor contribution and a stator fault contribution to the negative sequence voltage by performing a two-step initialization algorithm comprising a modified recursive least square (RLS) method, the noise factor contribution comprising unbalance in the electrical machine resulting from one or more of positive sequence current, negative sequence current, and positive sequence voltage. The processor is still further programmed to detect a stator fault in the electrical machine based on the stator fault contribution to the negative sequence voltage.

    SYSTEM AND METHOD FOR DETECTING STATOR FAULTS IN AC ELECTRICAL MACHINES
    8.
    发明申请
    SYSTEM AND METHOD FOR DETECTING STATOR FAULTS IN AC ELECTRICAL MACHINES 审中-公开

    公开(公告)号：US20180172768A1

    公开(公告)日：2018-06-21

    申请号：US15380724

    申请日：2016-12-15

    Applicant: Eaton Corporation

    Inventor： Santosh Kumar Sharma ,  Abhilash Pani ,  Steven Andrew Dimino ,  Mark Alan Verheyen

    IPC: G01R31/34 ,  G01R31/42

    CPC classification number: G01R31/34 ,  G01R31/025 ,  G01R31/06 ,  G01R31/346 ,  G01R31/42

    Abstract: A system and method for detecting a phase-to-ground fault in an AC electrical machine operates to receive measurements of three-phase voltages and currents provided to the AC electrical machine, compute at least one of a zero sequence component and a negative sequence component of voltage and current from the three-phase voltages and currents, and calculate a fault severity index (F SI) based on the zero or negative sequence component of voltage and current, so as to identify a phase-to-ground fault in the AC electrical machine. Calculating the FSI further includes determining a total value of the zero or negative sequence current, determining a noise-contributed value of the zero or negative sequence current included in the total value, determining a compensated value of the zero or negative sequence current based on the total value and the noise-contributed value, and calculating the FSI based on the compensated value.

    SYSTEM AND METHOD FOR DETECTING, LOCALIZING, AND QUANTIFYING STATOR WINDING FAULTS IN AC MOTORS
    10.
    发明申请
    SYSTEM AND METHOD FOR DETECTING, LOCALIZING, AND QUANTIFYING STATOR WINDING FAULTS IN AC MOTORS 有权
    用于检测，定位和定量交流电机定子绕组故障的系统和方法

    公开(公告)号：US20150276880A1

    公开(公告)日：2015-10-01

    申请号：US14230260

    申请日：2014-03-31

    Applicant: Eaton Corporation

    Inventor： Santosh Kumar Sharma ,  Rahul Choudhary ,  Steven Andrew Dimino

    IPC: G01R31/34 ,  G01R19/00

    CPC classification number: G01R31/346 ,  G01R19/0046 ,  H02P29/0243 ,  H02P2207/01

    Abstract: A system and method for detecting, localizing and quantifying stator winding faults in AC electrical machines is disclosed. A diagnostic system configured to detect a stator winding fault in an AC electrical machine includes a processor programmed to receive measurements of three-phase voltages and currents provided to the AC electrical machine from voltage and current sensors associated with the electrical distribution circuit, compute positive, negative and zero sequence components of voltage and current from the three-phase voltages and currents, and calculate a fault severity index (FSI) based on at least a portion of the positive, negative and zero sequence components of voltage and current, wherein calculating the FSI further comprises identifying a voltage gain in one or more phases of the AC electrical machine due to a stator winding fault and localizing the stator winding fault to one or more phases in the AC electrical machine.

    Abstract translation: 公开了一种用于检测，定位和定量交流电机定子绕组故障的系统和方法。 配置为检测AC电机中的定子绕组故障的诊断系统包括被编程为接收从与配电电路相关联的电压和电流传感器提供给AC电机的三相电压和电流的测量的处理器， 基于三相电压和电流的电压和电流的负序和零序分量，并且基于电压和电流的正，负和零序分量的至少一部分来计算故障严重度指数（FSI），其中计算 FSI进一步包括由于定子绕组故障在AC电机的一个或多个相中识别电压增益，并将定子绕组故障定位到AC电机中的一个或多个相位。

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