公开(公告)号：US10770970B2

公开(公告)日：2020-09-08

申请号：US15619118

申请日：2017-06-09

Applicant: Ford Global Technologies, LLC

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

IPC: B60L11/18 ,  H02M3/158 ,  B60L50/51 ,  B60L15/00 ,  H02M1/00 ,  H02M7/5387

Abstract: A powertrain for a vehicle may include a variable voltage converter (VVC), and a controller. The VVC may include an inductor, a bus capacitor and a flying capacitor. The controller may be configured to, in response to a power demand signal exceeding a threshold, modulate switches of the VVC such that an inductor current created by a collapsing field of the inductor is directed into the flying capacitor or the bus capacitor such that a bus capacitor voltage exceeds a flying capacitor voltage, and in response to the power demand signal dropping below the threshold, modulate switches such that the flying capacitor and the bus capacitor are coupled in parallel.

公开(公告)号：US10757843B2

公开(公告)日：2020-08-25

申请号：US15870181

申请日：2018-01-12

Applicant: Ford Global Technologies, LLC

Inventor： Lihua Chen ,  Baoming Ge ,  Fan Wang ,  Shahram Zarei ,  Fan Xu ,  Mohammed Khorshed Alam ,  Yan Zhou ,  Shuitao Yang ,  Petros G. Taskas

IPC: H05K7/20 ,  B60L3/00 ,  B60L15/00

Abstract: A vehicular system includes a pump, configured to circulate coolant for a traction inverter, and a controller. The controller may be configured to, responsive to each of a temperature of the traction inverter falling outside a first range or a requested flow rate of the pump falling outside a second range, operate the pump at a predefined speed, otherwise, operate the pump at a speed based on a difference between the temperature and a temperature associated with the coolant.

公开(公告)号：US10525841B2

公开(公告)日：2020-01-07

申请号：US15291312

申请日：2016-10-12

Applicant: Ford Global Technologies, LLC

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

IPC: B60L11/18 ,  H03K17/04 ,  H02M7/537 ,  B60L53/14 ,  H02M1/32 ,  H02M3/158 ,  H02M7/5387 ,  H03K17/16 ,  B60L3/00 ,  H02M1/00

Abstract: A vehicle includes an electric machine configured to provide propulsive force to the vehicle, and a power inverter configured to supply power from a traction battery to the electric machine using a first and second switch configured as a half-bridge, wherein the first switch is controlled by a gate driver. The gate driver is configured to operate in a soft turn-off mode when a load current exceeds a threshold for a time period defined by a mask timer, operate in a fast turn-off mode when the load current is below the threshold, and in response to a turn-off request received prior to expiration of the mask timer after the load current exceeds the threshold, enable the soft turn-off mode.

公开(公告)号：US10457150B2

公开(公告)日：2019-10-29

申请号：US15617592

申请日：2017-06-08

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Hadi Malek ,  Shuitao Yang ,  Yan Zhou

IPC: B60L11/18 ,  H02M3/335 ,  B60L15/00

Abstract: A power conversion system includes a power converter having output terminals that are electrically isolated from input terminals. The power conversion system further includes a circuit configured to couple a voltage input from a power source to the input terminals, and provide an output voltage to a load that is a series combination of the voltage input and a voltage across the output terminals.

公开(公告)号：US20190084444A1

公开(公告)日：2019-03-21

申请号：US15706267

申请日：2017-09-15

Applicant: Ford Global Technologies, LLC

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

IPC: B60L15/00 ,  B60L11/12 ,  B60L11/18

Abstract: A powertrain for a vehicle includes a Y-wound generator, a Y-wound motor, a generator inverter, a motor inverter, and a traction battery. The Y-wound generator and Y-wound motor are coupled via each respective neutral terminal. The generator inverter is coupled between the Y-wound generator and a generator bus and the motor inverter is coupled between the Y-wound motor and a motor bus. The traction battery has a first terminal coupled to each neutral terminal and a second terminal coupled to bus terminals of the generator and motor bus.

公开(公告)号：US20190044429A1

公开(公告)日：2019-02-07

申请号：US15669334

申请日：2017-08-04

Applicant: Ford Global Technologies, LLC

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

IPC: H02M1/32 ,  B60R16/033 ,  H02M7/5395 ,  H02P27/08

Abstract: A vehicle includes an inverter having a supply bus including a contactor operable to conduct current through a resistive element connected to a capacitive element having a voltage supplied by a battery. The vehicle includes a controller configured to energize a first gate of the inverter. The energization is responsive to the voltage exceeding a threshold. The controller is configured to detect current flow between a first phase associated with the gate and the bus based on a voltage drop associated with the voltage.

公开(公告)号：US20180287601A1

公开(公告)日：2018-10-04

申请号：US15472422

申请日：2017-03-29

Applicant: Ford Global Technologies, LLC

Inventor： Shuitao Yang ,  Yan Zhou ,  Lihua Chen ,  Fan Xu

IPC: H03K17/041 ,  H02J50/12 ,  H02J7/02 ,  H02J7/00 ,  H03K17/04 ,  H02M1/088 ,  B60L11/14 ,  B60L11/18 ,  B60L1/00

Abstract: A gate driver of a power device includes an inductor and a supply. The inductor is configured to, during a transitional period of the power device, convert a potential on a gate to a field, and the field to an opposite potential to toggle the gate and charge a floating capacitor to the opposite potential as an excess field collapses. The supply is configured to maintain the gate at the potential and generate the excess field during a non-transitional period.

公开(公告)号：US20180215269A1

公开(公告)日：2018-08-02

申请号：US15420164

申请日：2017-01-31

Applicant: Ford Global Technologies, LLC

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

IPC: B60L3/00 ,  H02M7/44 ,  H02M3/04 ,  B60L11/18 ,  H02P27/06 ,  B60L15/00 ,  B60L1/00 ,  B60L1/02

CPC classification number: B60L3/003 ,  B60L1/003 ,  B60L11/02 ,  B60L11/1811 ,  B60L11/1814 ,  B60L11/1816 ,  B60L15/007 ,  B60L15/20 ,  B60L2210/10 ,  B60L2210/30 ,  B60L2210/40 ,  H02M3/04 ,  H02M7/44 ,  H02P27/06 ,  H02P2201/09 ,  Y02T10/644 ,  Y02T10/7005 ,  Y02T10/7241 ,  Y10S903/904

Abstract: A vehicle powertrain includes a variable voltage converter, a bypass diode and a controller. The bypass diode may be coupled in parallel with the converter and configured to clamp an output of the converter to a battery voltage. The controller may be configured to, while in a boost mode and in response to a rate of change of a converter inductor current exceeding a boost threshold, open switches of the converter to divert propulsive energy through the bypass diode. The controller may also be configured to, while in buck mode and in response to a magnitude of a converter inductor current exceeding a buck threshold, open switches of the converter to divert regenerative energy through the bypass diode, while reversed biased, to the battery.

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.

公开(公告)号：US09931944B2

公开(公告)日：2018-04-03

申请号：US15077495

申请日：2016-03-22

Applicant: Ford Global Technologies, LLC

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

IPC: B60L1/00 ,  B60L3/00 ,  H02G3/00 ,  B60L11/02 ,  B60L11/18 ,  H02M3/158 ,  H02M7/533

CPC classification number: B60L11/02 ,  B60L7/18 ,  B60L11/123 ,  B60L11/14 ,  B60L11/1814 ,  B60L11/1861 ,  B60L15/007 ,  B60L15/2009 ,  B60L2210/10 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  H02J7/1492 ,  H02M3/158 ,  H02M7/533

Abstract: A vehicle powertrain includes a bypass diode and a controller. The bypass diode is configured to clamp an inverter DC terminal voltage to a battery voltage. The controller is configured to, while the terminal voltage is within a predetermined range of the battery voltage, maintain off a lower IGBT of a DC-DC converter while in a propulsion mode, and modulate the lower IGBT to increase the terminal voltage to maintain the bypass diode reverse biased while in a regenerative mode.