公开(公告)号：US10778105B2

公开(公告)日：2020-09-15

申请号：US15837315

申请日：2017-12-11

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

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

IPC: H02M3/335 ,  H02M1/14 ,  H02M3/158 ,  B60L50/51 ,  H02M7/48 ,  H02M1/00

Abstract: A DC-DC voltage converter for an electric vehicle connects between a battery pack and a DC link having upper and lower link capacitors. When a target voltage on the link is less than twice the battery voltage, the capacitors are charged in series from two interleaved switching legs of the converter simultaneously for part of the time, and charged in series from only one of the switching legs for part of the time. When the target voltage is between 2 and 4 times the battery voltage, the upper capacitor is charged alone from both legs for part of the time, the upper capacitor is charged alone from only one of the legs for part of the time, the lower capacitor is charged alone from both legs for part of the time, and the lower capacitor is charged alone from only one of the legs for part of the time.

公开(公告)号：US10432186B2

公开(公告)日：2019-10-01

申请号：US15812175

申请日：2017-11-14

Applicant: Ford Global Technologies, LLC

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

IPC: H03K3/012 ,  H03K17/082 ,  H02M7/5395 ,  H02P27/08 ,  B60K6/22 ,  B60R16/00

Abstract: A vehicle powertrain has a power inverter that includes a load switch with a main emitter and a current mirror emitter, a variable resistor coupled between the current mirror emitter and the main emitter, and a controller. The controller may be configured to adjust a gate voltage based on a voltage across the variable resistor, and responsive to the gate voltage exceeding a Miller plateau gate voltage, increase a variable resistor resistance such that feedback increases as the load switch saturates.

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.

公开(公告)号：US20190067160A1

公开(公告)日：2019-02-28

申请号：US15684697

申请日：2017-08-23

Applicant: Ford Global Technologies, LLC

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

IPC: H01L23/373 ,  H01L23/00 ,  H01L25/18 ,  H02M7/00

CPC classification number: H01L23/3735 ,  H01L24/48 ,  H01L24/49 ,  H01L25/072 ,  H01L25/18 ,  H01L2224/48091 ,  H01L2224/48225 ,  H01L2224/48472 ,  H01L2224/49111 ,  H01L2224/49171 ,  H01L2224/49175 ,  H01L2924/00014 ,  H01L2924/10253 ,  H01L2924/10272 ,  H01L2924/1203 ,  H01L2924/13055 ,  H01L2924/13091 ,  H01L2924/14252 ,  H01L2924/15747 ,  H01L2924/19107 ,  H02M7/003 ,  H02P27/06 ,  H01L2224/45099

Abstract: A power system has a single-side-cooled power module including a contiguous five-layer substrate of two insulative layers interleaved with three conductive layers. A center one of the conductive layers is partitioned to define discrete spaced apart positive terminal and output terminal portions, and an outer of the conductive layers defines a negative terminal portion such that the positive terminal and negative terminal portions overlap. The power system also has semiconductors respectively in direct contact with the positive terminal and output terminal portions without directly contacting the other layers.

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.

公开(公告)号：US10090792B2

公开(公告)日：2018-10-02

申请号：US15372654

申请日：2016-12-08

Applicant: Ford Global Technologies, LLC

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

IPC: H02P27/04 ,  H02P27/06 ,  H03K17/60 ,  H03K17/687 ,  B60L11/18

Abstract: A powertrain includes a first and second switch coupled in parallel to drive an electric machine and a gate driver. The gate driver may be configured to, in response to a transition request while a first temperature of the first switch exceeds a second temperature of the second switch, inject a current onto a gate of the second switch to drive rates of change of current through the first and second switch to the electric machine to a same value.

公开(公告)号：US20180205340A1

公开(公告)日：2018-07-19

申请号：US15407296

申请日：2017-01-17

Applicant: Ford Global Technologies, LLC

Inventor： Lihua Chen ,  Baoming Ge ,  Shuitao Yang ,  Shahram Zarei

IPC: H02P25/22

CPC classification number: H02P25/22 ,  H02P27/08 ,  H02P29/50 ,  Y02T10/7258

Abstract: A vehicle may include an electric machine including windings having a nonzero phase offset. The vehicle may further include first and second inverters configured to drive the electric machine as a result of toggling of switches. The switches may be toggled according to respective pulse width modulation (PWM) signals. One or more gate drivers may be configured to generate the PWM signals. The PWM signals may be based on fundamental waveforms having a phase shift that is based on the nonzero phase offset of the electric machine.

公开(公告)号：US09862276B2

公开(公告)日：2018-01-09

申请号：US15159051

申请日：2016-05-19

Applicant: Ford Global Technologies, LLC

Inventor： Lihua Chen ,  Yan Zhou ,  Shuitao Yang

IPC: H02P1/00 ,  H02H7/09 ,  B60L3/00 ,  H02P27/08 ,  H02P29/028 ,  H02M7/5387

CPC classification number: B60L3/0061 ,  B60L3/04 ,  B60L11/1803 ,  B60L15/025 ,  B60L15/08 ,  B60L2210/40 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  H02M7/53875 ,  H02P27/08 ,  H02P29/028 ,  H02P29/032

Abstract: A vehicle power system includes a controller configured to issue commands to open a selected set of switches of an inverter and then to operate the selected set of switches according to a pulse width modulation signal having an increasing duty cycle such that input current to a battery is driven towards zero and a magnitude of d-axis current of the drive system is reduced in response to a fault with an electric drive system.

公开(公告)号：US09837887B1

公开(公告)日：2017-12-05

申请号：US15224713

申请日：2016-08-01

Applicant: Ford Global Technologies, LLC

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

IPC: H02P1/04 ,  H02M1/088 ,  H02P27/08 ,  H03K17/567 ,  B60L11/18 ,  B60K6/42 ,  H02M1/00

CPC classification number: B60K6/42 ,  B60L11/1803 ,  B60L2210/14 ,  H02M2001/0054 ,  H02P27/08 ,  H03K17/165 ,  H03K17/168

Abstract: A vehicle powertrain includes an IGBT, having a Kelvin emitter and a mirror current sense, configured to energize an inductance, a first switch configured to draw a current from a gate of the IGBT at a rate based on a resistance engaged by the first switch while a current of the inductance exceeds a threshold, and a second switch configured to increase the rate in response to the current being less than the threshold. In one embodiment, the current is based on a filtered voltage across a resistor connected between the mirror current sense and chassis ground while the Kelvin emitter is connected to chassis ground. In another embodiment, the current is based on a filtered voltage across a resistor connected between the mirror current sense and the Kelvin emitter.

公开(公告)号：US10737575B2

公开(公告)日：2020-08-11

申请号：US15820771

申请日：2017-11-22

Applicant: Ford Global Technologies, LLC

Inventor： Petros Taskas ,  Lihua Chen ,  Shuitao Yang ,  Fan Xu ,  Mohammed Khorshed Alam ,  Baoming Ge

IPC: B60L3/00 ,  H02M7/537 ,  B60L3/12 ,  B60L1/00 ,  H02M7/5387 ,  H02M1/32 ,  H02M1/00

Abstract: A computer includes a processor; and a memory. The memory stores instructions executable by the processor to determine, based on a measurement performed in a vehicle, that a parameter of a power device is outside of a predetermined range; and actuate components in the vehicle to heat the power device.