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    Hybrid/Electrical Vehicle HV AC System Leakage and Ground Fault Detection
    3.
    发明申请
    Hybrid/Electrical Vehicle HV AC System Leakage and Ground Fault Detection 有权
    混合动力/电动车辆HV交流系统泄漏和接地故障检测

    公开(公告)号：US20140132278A1

    公开(公告)日：2014-05-15

    申请号：US13678222

    申请日：2012-11-15

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Yuqing Tang ,  Hongjie Wu

    IPC: G01R31/00

    CPC classification number: G01R31/007 ,  G01R31/025

    Abstract: Apparatus and methods for detection of a ground fault on a DC side as well as on an AC side of an inverter are presented. A detection means can receive forward and reverse current and provide an induced current based on the difference between them. A parameter associated with the induced current, or a parameter associated with a voltage generated by conduction of the induced current through a device, can be used to detect a ground fault. In addition, a detection means can be configured to receive transient current, and a resulting voltage at the detection means can be used for fault detection. A detection means can be disposed at the DC side of an inverter or at the AC side of the inverter. Apparatus and methods can be configured to detect AC leakage current caused by a ground fault.

    Abstract translation: 提出了用于检测直流侧以及逆变器交流侧接地故障的装置和方法。 检测装置可以接收正向和反向电流，并且基于它们之间的差异提供感应电流。 与感应电流相关联的参数或与通过器件感应电流的导通产生的电压相关联的参数可用于检测接地故障。 此外，检测装置可以被配置为接收瞬态电流，并且检测装置处的所得电压可用于故障检测。 检测装置可以设置在逆变器的直流侧或逆变器的交流侧。 可以配置装置和方法来检测由接地故障引起的交流漏电流。

    Hybrid/electrical vehicle HV AC system leakage and ground fault detection
    6.
    发明授权
    Hybrid/electrical vehicle HV AC system leakage and ground fault detection 有权
    混合动力/电动汽车HV交流系统漏电和接地故障检测

    公开(公告)号：US09274158B2

    公开(公告)日：2016-03-01

    申请号：US13678222

    申请日：2012-11-15

    Applicant: Ford Global Technologies, LLC

    Inventor： Yuqing Tang ,  Hongjie Wu

    IPC: G01R31/14 ,  G01R31/02 ,  G01R31/00

    CPC classification number: G01R31/007 ,  G01R31/025

    Abstract: Apparatus and methods for detection of a ground fault on a DC side as well as on an AC side of an inverter are presented. A detection means can receive forward and reverse current and provide an induced current based on the difference between them. A parameter associated with the induced current, or a parameter associated with a voltage generated by conduction of the induced current through a device, can be used to detect a ground fault. In addition, a detection means can be configured to receive transient current, and a resulting voltage at the detection means can be used for fault detection. A detection means can be disposed at the DC side of an inverter or at the AC side of the inverter. Apparatus and methods can be configured to detect AC leakage current caused by a ground fault.

    Abstract translation: 提出了用于检测直流侧以及逆变器交流侧接地故障的装置和方法。 检测装置可以接收正向和反向电流，并且基于它们之间的差异提供感应电流。 与感应电流相关联的参数或与通过器件感应电流的导通产生的电压相关联的参数可用于检测接地故障。 此外，检测装置可以被配置为接收瞬态电流，并且检测装置处的所得电压可用于故障检测。 检测装置可以设置在逆变器的直流侧或逆变器的交流侧。 可以配置装置和方法来检测由接地故障引起的交流漏电流。

    CONTROL STRATEGY FOR AN ELECTRIC MACHINE IN A VEHICLE
    7.
    发明申请
    CONTROL STRATEGY FOR AN ELECTRIC MACHINE IN A VEHICLE 有权
    汽车电机控制策略

    公开(公告)号：US20140062349A1

    公开(公告)日：2014-03-06

    申请号：US13690540

    申请日：2012-11-30

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Rimma Isayeva ,  David Crist Gabriel ,  Michael W. Degner ,  Yuqing Tang ,  Hongjie Wu

    IPC: H02P6/00

    CPC classification number: H02P6/001 ,  B60K6/445 ,  B60L3/0046 ,  B60W10/08 ,  B60W10/26 ,  B60W20/50 ,  G05B9/02 ,  Y02T10/6239 ,  Y02T10/7258

    Abstract: A hybrid-electric vehicle and method of controlling a hybrid-vehicle is provided. The vehicle includes a traction battery, at least one electric-machine, and a controller. The controller is configured to alter a voltage between the battery and the electric-machine based on a measured voltage of the battery or the high voltage bus. In response to an indication that the measured voltage is faulty during a drive cycle, the controller instead alters the voltage between the battery and the electric machine based on a substituted battery voltage signal such that the electric-machine remains operable for the drive cycle.

    Abstract translation: 提供混合动力车辆和控制混合动力车辆的方法。 车辆包括牵引电池，至少一个电机和控制器。 控制器被配置为基于电池或高压母线的测量电压来改变电池和电机之间的电压。 响应于在驱动周期期间测量的电压有故障的指示，控制器基于取代的电池电压信号来改变电池和电机之间的电压，使得电机保持可操作的驱动周期。

    Self-limiting active discharge circuit for electric vehicle inverter
    9.
    发明授权
    Self-limiting active discharge circuit for electric vehicle inverter 有权

    公开(公告)号：US10035422B2

    公开(公告)日：2018-07-31

    申请号：US15181703

    申请日：2016-06-14

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Yan Zhou ,  Yuqing Tang ,  Hongjie Wu ,  Lihua Chen ,  Shahram Zarei

    IPC: H02M7/12 ,  B60L11/02 ,  B60L11/18 ,  H02M1/32 ,  H02M7/537

    CPC classification number: B60L11/02 ,  B60L50/10 ,  B60L50/50 ,  H02M1/32 ,  H02M7/537 ,  H02M2001/322

    Abstract: A DC link capacitor coupled to positive and negative DC busses between a high voltage DC source and an electric vehicle inverter is quickly discharged during a shutdown. An active discharge circuit connected across the link capacitor has a discharge resistor in series with a discharge switch. The discharge switch has a control terminal for selectably turning the discharge switch on and off. A disable circuit is coupled to the control terminal and is responsive to a disable command signal to turn off the discharge switch. The disable circuit turns on the discharge switch upon cessation of the disable command signal. A timing circuit powered by a voltage from the link capacitor initiates a predetermined time interval upon cessation of the disable command signal, and continuously turns off the discharge switch after the predetermined time interval while the voltage from the link capacitor remains above a threshold.

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