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    Phase current sampling and regulating apparatus and methods, and electric motor drive systems
    32.
    发明授权
    Phase current sampling and regulating apparatus and methods, and electric motor drive systems 有权
    相电流采样和调节装置及方法以及电动机驱动系统

    公开(公告)号：US07834574B2

    公开(公告)日：2010-11-16

    申请号：US11944781

    申请日：2007-11-26

    申请人： Stephen T. West ,  Brian A. Welchko ,  Steven E. Schulz ,  Silva Hiti

    发明人： Stephen T. West ,  Brian A. Welchko ,  Steven E. Schulz ,  Silva Hiti

    IPC分类号： H02P1/32

    CPC分类号： G01R19/2509 ,  G01R19/2513 ,  G01R31/007 ,  H02P21/00

    摘要： In various embodiments, a phase current sampling apparatus (300, 600, FIGS. 3, 6), an electric motor drive system (100, FIG. 1), and a motor vehicle (1200, FIG. 12) include switching circuitry adapted to receive first and second phase current waveforms. The switching circuitry provides the first phase current waveform during at least two offset sampling instants, and provides the second phase current waveform during a reference sampling instant. An analog-to-digital converter is adapted to sample the first phase current waveform at the offset sampling instants, and to sample the second phase current waveform at the reference sampling instant. An embodiment of a method for regulating phase current waveforms includes an analog-to-digital converter generating samples of a first phase current waveform at sampling instants that occur before and after a reference sampling instant, and generating a sample of a second phase current waveform at the reference sampling instant.

    摘要翻译： 在各种实施例中，相电流采样装置（300,600，图3,6），电动机驱动系统（100，图1）和机动车辆（图12中的1200）包括适于 接收第一和第二相电流波形。 开关电路在至少两个偏移采样时刻提供第一相电流波形，并且在参考采样时刻期间提供第二相电流波形。 模拟 - 数字转换器适于在偏移采样时刻采样第一相电流波形，并在参考采样时刻采样第二相电流波形。 用于调节相电流波形的方法的实施例包括模数转换器，其在采样时刻产生在采样时刻之前和之后的采样时刻产生第一相电流波形的采样，并且产生第二相电流波形的采样 参考采样时刻。

    METHOD AND APPARATUS TO REDUCE PWM VOLTAGE DISTORTION IN ELECTRIC DRIVES
    33.
    发明申请
    METHOD AND APPARATUS TO REDUCE PWM VOLTAGE DISTORTION IN ELECTRIC DRIVES 有权
    降低电动机PWM电压失真的方法和装置

    公开(公告)号：US20080197902A1

    公开(公告)日：2008-08-21

    申请号：US11676574

    申请日：2007-02-20

    申请人： Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz ,  Silva Hiti

    发明人： Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz ,  Silva Hiti

    IPC分类号： H03K3/017

    CPC分类号： H03K3/017 ,  H02M7/5395 ,  H02M2001/0025 ,  H02P27/06

    摘要： Methods and apparatus are provided for reducing voltage distortion effects at low speed operation in electric drives. The method comprises receiving a first signal having a duty cycle with a range between minimum and maximum achievable duty cycles, producing a second duty cycle based on the minimum achievable duty cycle if the duty cycle is within a distortion range and less than a first clipping value, producing a second duty cycle based on the closer of minimum and maximum pulse widths if the duty cycle is within the distortion range and between the first and a second clipping value, producing a second duty cycle based on the maximum achievable duty cycle if the duty cycle is within the distortion range and greater than the second clipping value, and transmitting a second signal to the voltage source inverter having the second duty cycle.

    摘要翻译： 提供了用于在电驱动器中降低低速运行时的电压失真效应的方法和装置。 该方法包括接收具有在最小和最大可实现占空比之间的范围的占空比的第一信号，如果占空比在失真范围内并小于第一限幅值，则基于最小可实现占空比产生第二占空比 如果占空比在失真范围内，并且在第一和第二限幅值之间，则基于更小的最小和最大脉冲宽度产生第二占空比，如果占空比基于最大可实现的占空比，则产生第二占空比 循环处于失真范围内并且大于第二限幅值，并且将第二信号发送到具有第二占空比的电压源逆变器。

    TORQUE ESTIMATOR FOR IPM MOTORS
    34.
    发明申请
    TORQUE ESTIMATOR FOR IPM MOTORS 有权
    IPM电机的扭矩估计

    公开(公告)号：US20080183405A1

    公开(公告)日：2008-07-31

    申请号：US11668830

    申请日：2007-01-30

    申请人： Brian A. Welchko ,  Silva Hiti ,  Steven E. Schulz

    发明人： Brian A. Welchko ,  Silva Hiti ,  Steven E. Schulz

    IPC分类号： G01L3/00

    CPC分类号： H02P23/14

    摘要： In an embodiment of a method, the method includes measuring currents and voltages that are coupled to a motor that includes an internal permanent magnet and determining a reactive power in response to the measured currents and voltages. The method further includes estimating a first flux orthogonal to an axis of the internal permanent motor and estimating a second flux aligned with the axis of the internal permanent motor. Additionally, the method includes estimating a torque in response to the measured currents and the first and second fluxes.

    摘要翻译： 在方法的实施例中，该方法包括测量耦合到包括内部永磁体的电动机的电流和电压，并响应于测量的电流和电压来确定无功功率。 该方法还包括估计与内部永久电动机的轴正交的第一通量，并估计与内部永久电动机的轴线对准的第二通量。 另外，该方法包括响应于测量的电流和第一和第二通量来估计转矩。

    Electric motor drive systems, motor vehicles, and methods of phase current regulation
    36.
    发明授权
    Electric motor drive systems, motor vehicles, and methods of phase current regulation 有权
    电动机驱动系统，机动车辆和相电流调节方法

    公开(公告)号：US07880425B2

    公开(公告)日：2011-02-01

    申请号：US11944793

    申请日：2007-11-26

    申请人： Brian A. Welchko ,  Steven E. Schulz ,  Silva Hiti

    发明人： Brian A. Welchko ,  Steven E. Schulz ,  Silva Hiti

    IPC分类号： H02P27/00

    CPC分类号： B60L9/18 ,  B60L11/18 ,  H02P6/08 ,  H02P21/22 ,  H02P27/06 ,  H02P2205/01 ,  Y02T10/643 ,  Y02T10/7005

    摘要： In various embodiments, an electric motor drive system (400, FIG. 4) and a motor vehicle (1000, FIG. 10) include an inverter (404, FIG. 4) adapted to generate (604, FIG. 6), based on inverter control inputs, a number, N, of phase current waveforms (118, FIG. 1), and a phase current sampling apparatus (408, FIG. 4) having a same number, N, of current sensors (502, 503, 504, FIG. 5). Each of the current sensors is adapted to receive one of the phase current waveforms, and the current sensors are adapted simultaneously to sample the phase current waveforms and to generate digital values representing amplitudes of the phase current waveforms. The system and motor vehicle also include a controller (410, FIG. 4) adapted to receive the digital values, to perform an evaluation of the digital values, and to generate the inverter control inputs (462, FIG. 4) based on the evaluation.

    摘要翻译： 在各种实施例中，电动机驱动系统（400，图4）和机动车辆（图10中的1000）包括适于产生（604，图6）的逆变器（图4），基于 逆变器控制输入，N个相电流波形（图118）和具有相同数量N的电流传感器（502,503,504）的相电流采样装置（408，图4） ，图5）。 每个电流传感器适于接收一个相电流波形，并且电流传感器同时适应于对相电流波形进行采样并产生表示相电流波形幅度的数字值。 系统和机动车辆还包括适于接收数字值的控制器（410，图4），以执行数字值的评估，并且基于评估产生逆变器控制输入（462，图4） 。

    Method and system for operating an electric motor coupled to multiple power supplies
    37.
    发明授权
    Method and system for operating an electric motor coupled to multiple power supplies 有权
    用于操作耦合到多个电源的电动马达的方法和系统

    公开(公告)号：US07800331B2

    公开(公告)日：2010-09-21

    申请号：US11945368

    申请日：2007-11-27

    申请人： Sibaprasad Chakrabarti ,  Brian A. Welchko ,  Silva Hiti

    发明人： Sibaprasad Chakrabarti ,  Brian A. Welchko ,  Silva Hiti

    IPC分类号： H02P1/00

    CPC分类号： H02P27/08 ,  H02P2209/03 ,  Y02T10/7258

    摘要： Methods and systems are provided for operating an electric motor having at least one winding coupled to first and second power supplies. A torque command for the electric motor is received. A present power reserve for the first and second power supplies is determined based at least in part on the torque command. An operating voltage for the second power supply is determined based on the present power reserve. The operating voltage for the second power supply is applied to the at least one winding. The application of the operating voltage allowing the present power reserve to flow between the first and second power supplies and the motor.

    摘要翻译： 提供了用于操作具有耦合到第一和第二电源的至少一个绕组的电动机的方法和系统。 接收到电动机的转矩指令。 至少部分地基于转矩指令来确定用于第一和第二电源的当前功率储备。 基于当前动力储备来确定第二电源的工作电压。 第二电源的工作电压被施加到至少一个绕组。 施加允许当前功率储备在第一和第二电源和电动机之间流动的工作电压。