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    GATE DRIVE UNDER-VOLTAGE DETECTION
    44.
    发明申请
    GATE DRIVE UNDER-VOLTAGE DETECTION 有权
    门电机驱动下电检测

    公开(公告)号：US20160018446A1

    公开(公告)日：2016-01-21

    申请号：US14331438

    申请日：2014-07-15

    Applicant: Ford Global Technologies, LLC

    Inventor： Lihua Chen ,  Dong Cao ,  Yan Zhou ,  Craig Rogers

    IPC: G01R19/165 ,  H02M7/5387 ,  H02M1/32

    CPC classification number: G01R19/1659 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H02M7/53871 ,  H03K17/00 ,  H03K17/18

    Abstract: Gate drive faults are detected for an inverter which comprises a phase switch having an insulated gate, such as an IGBT. A complementary transistor pair is adapted to receive a supply voltage and a pulse-width modulated (PWM) signal to alternately charge and discharge the insulated gate. A comparator compares the voltage at the insulated gate with a reference voltage representing a gate drive fault to generate a first logic signal. A latch samples the first logic signal when the PWM signal has a value corresponding to charging the insulated gate. A logic circuit inhibits charging of the insulated gate when the latched logic signal indicates the gate drive fault. An insulated gate voltage less than the reference voltage is indicative of an under-voltage fault as well as other device failures of the IGBT or the complementary transistors.

    Abstract translation: 对于包括具有诸如IGBT的绝缘栅的相位开关的逆变器，检测到栅极驱动故障。 互补晶体管对适于接收电源电压和脉冲宽度调制（PWM）信号以交替地对绝缘栅极进行充电和放电。 比较器将绝缘栅极处的电压与表示栅极驱动故障的参考电压进行比较，以产生第一逻辑信号。 当PWM信号具有对应于对绝缘栅极充电的值时，锁存器对第一逻辑信号进行采样。 当锁存的逻辑信号指示栅极驱动故障时，逻辑电路禁止绝缘栅极的充电。 小于参考电压的绝缘栅极电压表示欠压故障以及IGBT或互补晶体管的其他器件故障。

    Active discharge circuit for link capacitor using phase leg switches
    46.
    发明授权
    Active discharge circuit for link capacitor using phase leg switches 有权

    公开(公告)号：US10384561B2

    公开(公告)日：2019-08-20

    申请号：US15268872

    申请日：2016-09-19

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Shuitao Yang ,  Yan Zhou ,  Fan Xu ,  Mohammed Khorshed Alam ,  Lihua Chen

    IPC: B60L11/00 ,  B60L11/10 ,  B60L11/18 ,  H02M7/46 ,  B60L50/14 ,  H02M7/5387 ,  B60L3/00 ,  H02M1/32

    Abstract: A DC link capacitor in a drive system for an electric vehicle is quickly discharged using only local action within an inverter module and without any extra components to dissipate the charge. The inverter has a phase leg comprising an upper switching device and a lower switching device coupled across the capacitor. A gate driver is coupled to the phase leg to alternately switch the switching devices to ON state according to a PWM signal during pulse-width modulation of the drive system. The gate driver is configured to discharge the link capacitor during a discharge event by simultaneously activating the upper and lower switching devices to transitional states. Thus use of transitional states ensures that the switching devices provide an impedance that dissipates the capacitor charge while protecting the devices from excessive temperature.

    Variable Voltage Controller
    48.
    发明申请
    Variable Voltage Controller 审中-公开

    公开(公告)号：US20190023144A1

    公开(公告)日：2019-01-24

    申请号：US15653779

    申请日：2017-07-19

    Applicant: Ford Global Technologies, LLC

    Inventor： Baoming Ge ,  Lihua Chen ,  Shuitao Yang ,  Yan Zhou ,  Fan Xu ,  Khorshed Khorshed Alam

    IPC: B60L11/18 ,  B60L3/00 ,  H04L12/40 ,  H02J7/00 ,  B60K6/52

    Abstract: A vehicle includes an inverter connected to an energy store having a variable output voltage and including a first pair of battery partitions. The vehicle includes a controller configured to operate a first set of switches to arrange electrical connections between the first pair such that the variable output voltage is greater than battery voltage of a one of the battery partitions. The operation of switches is responsive to a parameter indicative of speed of an electric machine electrically coupled to the inverter exceeding a first predetermined threshold.

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