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公开(公告)号：US09917435B1
公开(公告)日：2018-03-13
申请号：US15263691
申请日：2016-09-13
Applicant: FORD GLOBAL TECHNOLOGIES, LLC
Inventor： Xi Lu , Chingchi Chen , Michael W. Degner , Zhuxian Xu , Ke Zou
IPC: H02H5/04 , H02H3/08 , H02M7/5387
CPC classification number: H02M7/5387 , B60K6/22 , B60K6/26 , B60K6/48 , B60Y2400/61 , H02H3/085 , H02M1/08 , H02M7/53871 , H02M2001/0009 , H02M2001/327
Abstract: A power switching circuit provides temperature compensation for an insulated gate power switching device. A timing circuit determines a switch timing signal comprising desired on and off switching times of the switching device. A temperature monitor quantifies a device temperature. A gate drive profile generator generates a switching device drive signal according to the switch timing signal and having a dv/dt phase and a di/dt phase. The drive signal has a profile during the di/dt phase that is adjusted in response to the device temperature, and the drive signal has a profile during the dv/dt phase that is not adjusted in response to the device temperature.
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公开(公告)号：US20170274776A1
公开(公告)日：2017-09-28
申请号：US15077492
申请日：2016-03-22
Applicant: Ford Global Technologies, LLC
Inventor： Zhuxian Xu , Chingchi Chen , Xi Lu , Ke Zou
CPC classification number: B60L11/02 , B60L11/1814 , H01L27/0664 , H01L29/7396 , H02M3/158 , H02M7/533 , H02M7/53875 , H02M2001/0054 , H02M2001/007 , Y02B70/1491 , Y02T10/7258
Abstract: A vehicle powertrain includes an IGBT that conducts current between a supply and load. The vehicle powertrain also includes a controller that applies voltage to a gate of the IGBT at a first level for a first duration that depends on a capacitance of the gate, and increases the voltage over a second duration based on a rate of change of the current falling below a threshold defined by a supply voltage for the load.
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公开(公告)号：US20200373852A1
公开(公告)日：2020-11-26
申请号：US16416548
申请日：2019-05-20
Applicant: FORD GLOBAL TECHNOLOGIES, LLC
Inventor： Zhuxian Xu , Chingchi Chen
IPC: H02M7/5387 , H02M1/08 , H02P27/08
Abstract: Current imbalances between parallel switching devices in a power converter half leg are reduced. A gate driver generates a nominal PWM gate drive signal for a respective half leg. A first feedback loop couples the nominal PWM gate drive signal to a gate terminal of a respective first switching device. The first feedback loop has a first mutual inductance with a current path of a first parallel switching device and has a second mutual inductance with a current path of a second parallel switching device. The first and second mutual inductances are arranged to generate opposing voltages in the first feedback loop, so that when all the parallel switching devices carry equal current then the voltages cancel.
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14.发明授权公开(公告)号：US10122294B2
公开(公告)日：2018-11-06
申请号：US15366266
申请日：2016-12-01
Applicant: FORD GLOBAL TECHNOLOGIES, LLC
Inventor： Zhuxian Xu , Chingchi Chen , Michael W. Degner
Abstract: An inverter phase leg has upper and lower gate drive circuits supplying gate drive signals to upper and lower transistors. Each gate drive circuit includes an active clamp for selectively deactivating the upper and lower transistors. The transistors are comprised of semiconductor devices, each having respective gate, source, and emitter terminals. Each emitter terminal is connected to a respective output electrode structured to enhance a common source inductance between the respective gate and emitter terminals. Each emitter terminal is further connected to a respective Kelvin emitter electrode substantially bypassing the respective output electrode. Each respective active clamp is connected between the respective gate terminal and Kelvin emitter electrode so that the active clamping function remains effective in the presence of the enhanced common source inductance.
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公开(公告)号：US10011178B1
公开(公告)日：2018-07-03
申请号：US15617239
申请日：2017-06-08
Applicant: Ford Global Technologies, LLC
Inventor： Zhuxian Xu , Chingchi Chen
CPC classification number: B60L11/1803 , B60L3/003 , B60L15/007 , B60L50/51 , H02M1/084 , H02M1/15 , H02M2001/007 , H02M2001/008 , H02P27/08 , H03K17/08128 , H03K17/168
Abstract: An electrified vehicle propulsion system uses current feedback to modify gate drive signals to suppress voltage spikes and increase switching efficiency. A DC link having a link capacitor and a link inductance is connected to first and second converters. A first converter bridge has a first phase leg with first upper and lower switching devices, each switching device having a respective gate loop. A second converter bridge has a second phase leg with second upper and lower switching devices, each switching device having a respective gate loop. A plurality of gate drivers provide gate drive signals to respective gate loops for turning the respective switching devices on and off. A plurality of gate coils are provided, wherein each gate coil is connected in series between a respective gate driver and a respective gate loop. Each gate coil is respectively inductively coupled to the link inductance.
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Patent Agency Ranking
公开(公告)号：US09994110B2
公开(公告)日：2018-06-12
申请号：US15251231
申请日：2016-08-30
Applicant: Ford Global Technologies, LLC
Inventor： Zhuxian Xu , Chingchi Chen , Michael W. Degner
CPC classification number: B60L11/1803 , B60L15/007 , B60L2210/40 , H01L2224/48247 , H01L2224/4903 , H02M1/088 , H02M7/003 , H02M2001/0054 , H02P27/08 , H03K17/08148 , H03K17/162 , H03K17/168 , H03K17/567
Abstract: A vehicle includes an electric machine that provides propulsive force to the vehicle, and a power inverter that supplies power from a traction battery to the electric machine using a first and second switch configured as a half-bridge. The first switch has a first gate, a first gate lead coupled with the first gate and having a first inductance, and a second gate lead coupled with the first gate and having a second inductance greater than the first inductance.
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公开(公告)号：US09991880B2
公开(公告)日：2018-06-05
申请号：US15175339
申请日：2016-06-07
Applicant: FORD GLOBAL TECHNOLOGIES, LLC
Inventor： Zhuxian Xu , Chingchi Chen
CPC classification number: H03K17/0406 , H02M1/08 , H02M7/003 , H02M2001/0054 , H02P6/14 , H02P27/06 , H03K17/14
Abstract: Routing of a gate signal for controlling a discrete power switching device (such as in an inverter for an electric vehicle drive) is configured to compensate for the common source inductance inherent in the switching device as a result of its integrated circuit packaging. The power device has a gate signal path via a gate pin and a power signal path via first and second power pins, wherein the gate signal path and the power signal path have a first mutual inductance. A circuit board apparatus provides a gate wiring loop juxtaposed with the power signal path, wherein the gate wiring loop and the power signal path have a second mutual inductance substantially canceling the first mutual inductance. The resulting reduction in common source inductance avoids the reductions in switching speed and the increased switching losses otherwise introduced by the common source inductance.
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公开(公告)号：US20180056795A1
公开(公告)日：2018-03-01
申请号：US15251231
申请日：2016-08-30
Applicant: Ford Global Technologies, LLC
Inventor： Zhuxian Xu , Chingchi Chen , Michael W. Degner
IPC: B60L11/18 , H03K17/567 , H02P27/08 , H02M1/088
CPC classification number: B60L11/1803 , B60L15/007 , B60L2210/40 , H01L2224/48247 , H01L2224/4903 , H02M1/088 , H02M7/003 , H02M2001/0054 , H02P27/08 , H03K17/08148 , H03K17/162 , H03K17/168 , H03K17/567
Abstract: A vehicle includes an electric machine that provides propulsive force to the vehicle, and a power inverter that supplies power from a traction battery to the electric machine using a first and second switch configured as a half-bridge. The first switch has a first gate, a first gate lead coupled with the first gate and having a first inductance, and a second gate lead coupled with the first gate and having a second inductance greater than the first inductance.
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公开(公告)号：US20170264284A1
公开(公告)日：2017-09-14
申请号：US15067878
申请日：2016-03-11
Applicant: Ford Global Technologies, LLC
Inventor： Zhuxian Xu , Chingchi Chen , Ke Zou , Xi Lu , Michael W. Degner , Jun Kikuchi
IPC: H03K17/16 , H03K17/567 , H02M1/088 , B60L11/18
Abstract: A vehicle includes an electric machine, an IGBT, and a gate driver. The IGBT has a gate, an emitter, and a collector and is configured to flow an electric charge through a phase of the electric machine. The gate driver is configured to flow current onto the gate at a first level, and in response to a time integral of a voltage across the phase exceeding a predetermined level, transition from the first level to a second level less than the first level.
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公开(公告)号：US20170067940A1
公开(公告)日：2017-03-09
申请号：US14846521
申请日：2015-09-04
Applicant: Ford Global Technologies, LLC
Inventor： Chingchi Chen , Richard William Kautz , Zhuxian Xu
CPC classification number: G01R15/183 , G01R17/02 , G01R19/0084 , G01R29/26 , G01R31/001
Abstract: A differential voltage probe for providing accurate measurement of differential voltage with high frequency components is disclosed that is further configured to accurately identify noise sources in EMI/EMC applications. The differential voltage probe is configured to provide the benefits of adequate differential voltage measurement bandwidth, galvanic isolation capability, high CMRR, flexible design to accommodate various requirements on voltage rating, loading effect, and frequency range of interest; and/or easy implementation and low cost. The differential voltage probe is able to achieve these optimized capabilities by implementing unique winding designs for transformer(s) used in the differential voltage probe circuit design.
Abstract translation: 公开了一种差分电压探头，用于提供具有高频分量的差分电压的精确测量，其进一步配置为准确地识别EMI / EMC应用中的噪声源。 差分电压探头配置为提供足够的差分电压测量带宽，电流隔离能力，高CMRR，灵活设计的优点，以适应各种对额定电压，负载效应和感兴趣频率范围的要求; 和/或易于实施和低成本。 差分电压探头通过为差分电压探头电路设计中使用的变压器实现独特的绕组设计，能够实现这些优化的功能。
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