中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

21 records (took 0.014 seconds)

    Isolation of particular fault conditions in an electric machine assembly
    2.
    发明授权
    Isolation of particular fault conditions in an electric machine assembly 有权

    公开(公告)号：US10355634B1

    公开(公告)日：2019-07-16

    申请号：US16005775

    申请日：2018-06-12

    Applicant: GM Global Technology Operations LLC

    Inventor： Jiyu Zhang ,  Mutasim A. Salman

    IPC: H02P7/00 ,  H02P29/024 ,  H02P21/14 ,  G01R31/34 ,  G01R31/02 ,  B60W10/08

    Abstract: An electric machine assembly having an electric machine and a controller-based method for isolating a particular fault condition in the electric machine. A plurality of current sensors is configured to output respective measured currents in respective phases of the electric machine. A position sensor is configured to output a rotor position of the electric machine. A controller is configured to group the respective measured currents into respective combinations of two. The controller is configured to calculate respective residual factors (Ri), and a global residual factor (G) based on the respective residual factors (Ri). Responsive to at least three of the global residual factor (G) and the respective residual factors (Ri) exceeding respective calibrated error thresholds, the controller is configured to identify a particular fault condition from among a plurality of possible fault conditions and execute a control action with respect to the electric machine.

    PREDICTION OF RESOLVER MALFUNCTIONS
    4.
    发明公开
    PREDICTION OF RESOLVER MALFUNCTIONS 审中-公开

    公开(公告)号：US20240168474A1

    公开(公告)日：2024-05-23

    申请号：US17993322

    申请日：2022-11-23

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jiyu Zhang ,  Brian J. Gallert

    IPC: G05B23/02 ,  G01R31/34

    CPC classification number: G05B23/0283 ,  G01R31/343

    Abstract: A method of monitoring a propulsion system of a vehicle includes determining a health indicator from a diagnostic signal based on electrical outputs from a resolver connected to an electric motor of the propulsion system, the diagnostic signal related to a resolver offset and/or a resolver wobble, calculating a reference value based on values of the health indicator determined during a first time period, and monitoring the health indicator over a second time period, where the monitoring includes continuously or periodically calculating a trend value of the health indicator over a plurality of cycles. The method also includes comparing each trend value to the reference value and estimating a difference between the trend value and the reference value for each cycle, predicting whether a fault will occur based on the difference, and based on the predicting indicating that a fault will occur, outputting a fault indication.

    Systems and methods for detecting and isolating faults within a power inverter
    5.
    发明授权
    Systems and methods for detecting and isolating faults within a power inverter 有权

    公开(公告)号：US11860239B2

    公开(公告)日：2024-01-02

    申请号：US17706745

    申请日：2022-03-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jiyu Zhang ,  Nomar S. Gonzalez Santini

    IPC: G01R31/40 ,  H02M7/00 ,  H02M1/32

    CPC classification number: G01R31/40 ,  H02M1/327 ,  H02M7/003

    Abstract: A diagnostic system for diagnosing faults in a power inverter including a power loss estimating module configured to calculate a power loss of one or more components of the power inverter. A junction temperature estimating module is configured to output an estimated junction temperature of the one or more components of the power inverter. A plurality of temperature sensors is configured to sense a plurality of temperatures of a plurality of inverter legs, respectively. A health indicator generating module is configured to generate a plurality of health indicators in response to the estimated junction temperature and the plurality of sensed temperatures of the plurality of inverter legs. A fault identification module is configured to selectively identify one of an inverter fault, a temperature sensor fault, and no fault in response to the plurality of health indicators.

    Systems and methods for detecting stator winding faults and degradation
    6.
    发明授权
    Systems and methods for detecting stator winding faults and degradation 有权

    公开(公告)号：US11489471B2

    公开(公告)日：2022-11-01

    申请号：US16715102

    申请日：2019-12-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jiyu Zhang ,  Siddharth Ballal ,  Lei Hao ,  Wesley G. Zanardelli ,  Bojian Cao

    IPC: H02P9/10 ,  H02P27/08 ,  H02P21/22 ,  H02P27/12 ,  H02P21/20 ,  H02P21/18

    Abstract: A diagnostic system includes: a current command module configured to, based on a motor torque request, a motor speed, a direct current (DC) bus voltage, generate a d-axis current command for an electric motor and a q-axis current command for the electric motor; a voltage command module configured to, based on the d-axis current command and the q-axis current command, generate a d-axis voltage command and a q-axis voltage command; a switching control module configured to control switching of an inverter module based on the d-axis voltage command and the q-axis voltage command, where the inverter module is configured to apply power to stator windings of the electric motor from the DC bus; and a fault module configured to selectively indicate that the stator windings of the electric motor are degraded when the d-axis voltage command is less than a predetermined nominal d-axis voltage of the electric motor.

    DETECTING DEGRADATION WITHIN ELECTRIC MOTORS
    7.
    发明公开
    DETECTING DEGRADATION WITHIN ELECTRIC MOTORS 审中-公开

    公开(公告)号：US20240169771A1

    公开(公告)日：2024-05-23

    申请号：US17993258

    申请日：2022-11-23

    Applicant: GM Global Technology Operations LLC

    Inventor： Jiyu Zhang ,  Brian J. Gallert

    IPC: G07C5/08 ,  G01R31/34 ,  H02P21/20

    CPC classification number: G07C5/0808 ,  G01R31/34 ,  H02P21/20

    Abstract: Examples described herein provide a computer-implemented method that includes receiving data from an electric motor of a vehicle, the electric motor comprising a stator and a rotor. The method further includes performing a motor health degradation analysis to determine whether a degradation of the electric motor has occurred. The method further includes performing a stator health degradation analysis to determine that a stator degradation has occurred. The method further includes performing a rotor health degradation analysis to determine that a rotor degradation has occurred. The method further includes implementing a corrective action for the vehicle e responsive to determining that the degradation of the electric motor has occurred and at least one of the stator degradation or the rotor degradation has occurred.

    Sensor fusion based on intersection scene to determine vehicle collision potential
    10.
    发明授权
    Sensor fusion based on intersection scene to determine vehicle collision potential 有权

    公开(公告)号：US11325594B2

    公开(公告)日：2022-05-10

    申请号：US16785771

    申请日：2020-02-10

    Applicant: GM Global Technology Operations LLC

    Inventor： Shengbing Jiang ,  Shuqing Zeng ,  Prakash Mohan Peranandam ,  Meng Jiang ,  Jiyu Zhang ,  Mohamed A. Layouni

    IPC: B60W30/095 ,  B60W50/16 ,  G01S13/931 ,  G01S17/931 ,  B60W30/09

    Abstract: Methods and systems to implement sensor fusion to determine collision potential for a vehicle include identifying a specific intersection that the vehicle is approaching, and identifying collision potential scenarios associated with one or more paths through the specific intersection. Each collision potential scenario defines a risk of a collision between the vehicle and an object in a specified area. A weight with which one or more information sources of the vehicle are considered is adjusted for each collision potential scenario such that a highest weight is given to one or more of the one or more information sources that provide most relevant and reliable information about the specified area. Sensor fusion is implemented based on the adjusting the weight of the one or more information sources and performing detection based on the sensor fusion, and an alert is provided or actions are implemented according to the detection.

Patent Agency Ranking