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    SYSTEMS AND METHODS FOR ADAPTIVE PULSE WIDTH MODULATION
    1.
    发明申请
    SYSTEMS AND METHODS FOR ADAPTIVE PULSE WIDTH MODULATION 有权

    公开(公告)号：US20220216818A1

    公开(公告)日：2022-07-07

    申请号：US17142838

    申请日：2021-01-06

    Applicant: Ford Global Technologies, LLC

    Inventor： Chris Wolf ,  Michael Degner

    IPC: H02P27/08 ,  B60L15/20 ,  B60L15/08 ,  B60L50/61

    Abstract: Methods and systems are provided for adaptive pulse width modulated control of an electrified powertrain of a vehicle. In one example, a method may include perturbing a switching frequency for pulse width modulated control of the electrified powertrain, and, responsive to sound measured in a vehicle cabin indicating a noise improvement after the perturbation, controlling the electrified powertrain with the perturbed switching frequency. In this way, acoustic emissions from an electrified powertrain may be reduced.

    GRAIN BOUNDARY DIFFUSION TECHNOLOGY FOR RARE EARTH MAGNETS
    4.
    发明申请
    GRAIN BOUNDARY DIFFUSION TECHNOLOGY FOR RARE EARTH MAGNETS 审中-公开

    公开(公告)号：US20190131066A1

    公开(公告)日：2019-05-02

    申请号：US15795208

    申请日：2017-10-26

    Applicant: Ford Global Technologies, LLC

    Inventor： C. Bing Rong ,  Feng Liang ,  Michael Degner ,  Wanfeng Li

    IPC: H01F41/02 ,  H01F1/057 ,  B22F1/02

    Abstract: A grain boundary diffusion method for a rare-earth (RE) magnet is provided. The method includes coating particles of the RE magnet with a coating material. Each RE magnet particle includes a plurality of grains. The coated particles are then simultaneously heat treated and compacted. The heat treated, compacted, and coated particles are then formed into a rare earth magnet. In a form of the method, the heat treated, compacted, and coated particles are hot deformed prior to being formed into a rare earth magnet. Another form of the method achieves the grain boundary diffusion without first sintering the rare earth magnet.

    Method of Current Sensor Related Torque Error Estimation for IPMSM Based E-Drive System
    6.
    发明申请
    Method of Current Sensor Related Torque Error Estimation for IPMSM Based E-Drive System 审中-公开
    基于IPMSM的电子驱动系统的电流传感器相关扭矩误差估计方法

    公开(公告)号：US20150025828A1

    公开(公告)日：2015-01-22

    申请号：US13942838

    申请日：2013-07-16

    Applicant: Ford Global Technologies, LLC

    Inventor： Chang-jiang Wang ,  Michael Degner

    IPC: G01R35/00

    CPC classification number: G01R35/00 ,  B60L3/0038 ,  B60L3/0061 ,  B60L3/12 ,  B60L2240/423 ,  B60L2240/429 ,  G01D21/00 ,  G05B15/02 ,  G05D17/00 ,  G06F17/40 ,  G06F19/00 ,  H02P21/20 ,  H02P31/00 ,  Y02T10/643 ,  Y02T10/7258

    Abstract: A method for estimating torque control error at an electric machine considers the effects of current sensor error characteristics. Systems and methods can be practiced to determine the maximum sensor error that can be tolerated without causing unacceptable torque error. An example method uses sensor characteristics and machine characteristics to determine current sensing error, current control error, and torque control error. Determining the lowest sensor accuracy required for a desired torque control accuracy can facilitate the use of lower cost sensors in current-feedback controlled electric drive systems without compromising performance. Other applications can include vehicle diagnostics and torque error compensation.

    Abstract translation: 用于估计电机转矩控制误差的方法考虑了电流传感器误差特性的影响。 可以实施系统和方法以确定可以容忍的最大传感器误差而不引起不可接受的扭矩误差。 一个示例方法使用传感器特性和机器特性来确定电流检测误差，电流控制误差和转矩控制误差。 确定期望转矩控制精度所需的最低传感器精度可以有助于在电流反馈控制的电驱动系统中使用较低成本的传感器，而不会影响性能。 其他应用可以包括车辆诊断和扭矩误差补偿。

    Systems and methods for adaptive pulse width modulation
    8.
    发明授权
    Systems and methods for adaptive pulse width modulation 有权

    公开(公告)号：US11469702B2

    公开(公告)日：2022-10-11

    申请号：US17142838

    申请日：2021-01-06

    Applicant: Ford Global Technologies, LLC

    Inventor： Chris Wolf ,  Michael Degner

    IPC: H02P1/04 ,  H02P27/08 ,  B60L15/20 ,  B60L50/61 ,  B60L15/08

    Abstract: Methods and systems are provided for adaptive pulse width modulated control of an electrified powertrain of a vehicle. In one example, a method may include perturbing a switching frequency for pulse width modulated control of the electrified powertrain, and, responsive to sound measured in a vehicle cabin indicating a noise improvement after the perturbation, controlling the electrified powertrain with the perturbed switching frequency. In this way, acoustic emissions from an electrified powertrain may be reduced.

    Determination of hysteresis controller band for IPMSM-based drive system
    9.
    发明授权
    Determination of hysteresis controller band for IPMSM-based drive system 有权
    确定基于IPMSM的驱动系统的滞后控制器频带

    公开(公告)号：US09065362B2

    公开(公告)日：2015-06-23

    申请号：US13923862

    申请日：2013-06-21

    Applicant: Ford Global Technologies, LLC

    Inventor： Chiang-jiang Wang ,  Michael Degner

    IPC: H02P6/12 ,  H02P7/00

    CPC classification number: H02P7/00 ,  H02P21/30 ,  H02P27/12

    Abstract: Methods of providing a control band for a hysteresis controller are presented. A method can determine a control band analytically to avoid the time and costs associated with manual calibration of a hysteresis controller. By way of example, a method can include modeling a machine output, such as stator flux or machine torque, modeling the variation rate for the machine output, and providing a control band based on the variation rate modeling.

    Abstract translation: 提出了一种为迟滞控制器提供控制带的方法。 一种方法可以分析确定控制带，以避免与滞后控制器的手动校准相关的时间和成本。 作为示例，方法可以包括对机器输出进行建模，例如定子通量或机器扭矩，对机器输出的变化率进行建模，以及基于变化率建模提供控制带。

    Detection Method of Current Sensor Faults in the E-Drive System By Using the Voltage Command Error
    10.
    发明申请
    Detection Method of Current Sensor Faults in the E-Drive System By Using the Voltage Command Error 有权
    使用电压指令误差对电动传动系统中电流传感器故障的检测方法

    公开(公告)号：US20150061708A1

    公开(公告)日：2015-03-05

    申请号：US14011720

    申请日：2013-08-27

    Applicant: Ford Global Technologies, LLC

    Inventor： Chang-jiang Wang ,  Michael Degner ,  Rimma Isayeva ,  Liwen Xu ,  Daniel R. Luedtke

    IPC: G01R31/319

    CPC classification number: G01R31/3191 ,  H02P29/024 ,  H02P29/0241

    Abstract: Systems, apparatus, and methods detect a current sensor error in an FOC electric machine system. A voltage command is monitored to detect the presence of an ac component can indicate that an error has occurred at a current sensor. By way of example, a sensor fault detection module can be configured to determine the deviation between an actual voltage command and an ideal voltage command to provide a complex deviation vector. By transforming the deviation vector to a reference frame rotating at the fundamental frequency of the command voltage, a dc component of the positive and negative sequences can be filtered, and their amplitudes determined. Error detection can be based on the total amplitude of the fundamental component, determined by positive and negative component amplitudes. The invention enables an FOC system to operate with two current sensors, rather than three, and provides a dedicated fault diagnostic for a current sensor.

    Abstract translation: 系统，装置和方法检测FOC电机系统中的电流传感器误差。 监视电压指令以检测交流分量的存在可以指示当前传感器发生错误。 作为示例，传感器故障检测模块可以被配置为确定实际电压命令和理想电压命令之间的偏差以提供复数偏差矢量。 通过将偏差矢量转换为以指令电压的基频旋转的参考帧，可以对正和负序列的直流分量进行滤波，并确定其幅度。 误差检测可以基于由正和负分量幅度确定的基波分量的总振幅。 本发明使得FOC系统能够利用两个电流传感器而不是三个操作，并为电流传感器提供专用故障诊断。

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