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    Method and system for initiating operation of an electric motor
    11.
    发明授权
    Method and system for initiating operation of an electric motor 有权
    电动机启动运行的方法和系统

    公开(公告)号：US08319460B2

    公开(公告)日：2012-11-27

    申请号：US12606839

    申请日：2009-10-27

    Applicant: Yo Chan Son ,  Jihoon Jang ,  Brian A. Welchko ,  Nitinkumar R. Patel ,  Steven E. Schulz

    Inventor： Yo Chan Son ,  Jihoon Jang ,  Brian A. Welchko ,  Nitinkumar R. Patel ,  Steven E. Schulz

    IPC: H02P6/04

    CPC classification number: H02P6/20

    Abstract: Methods and systems for controlling an electric motor are provided. The motor includes a plurality of windings. Each winding is coupled to a respective set of first and second switches. The first switch of each set of switches is simultaneously activated. Current flow through the plurality of windings is measured while the first switch of each set of switches is activated. The electric motor is controlled according to a first motor control method if the measured current is below a predetermined threshold. The electric motor is controlled according to a second motor control method if the measured current is above the predetermined threshold.

    Abstract translation: 提供了用于控制电动机的方法和系统。 马达包括多个绕组。 每个绕组耦合到相应的一组第一和第二开关。 每组开关的第一个开关同时被激活。 当每组开关的第一开关被激活时，测量通过多个绕组的电流。 如果测量电流低于预定阈值，则根据第一电动机控制方法来控制电动机。 如果测量的电流高于预定阈值，则根据第二电动机控制方法来控制电动机。

    Fail-safe controls for electric traction drive systems
    13.
    发明授权
    Fail-safe controls for electric traction drive systems 有权
    电力牵引驱动系统的故障安全控制

    公开(公告)号：US08258736B2

    公开(公告)日：2012-09-04

    申请号：US12582562

    申请日：2009-10-20

    Applicant: Nitinkumar R. Patel ,  Tim M. Grewe ,  Yo Chan Son

    Inventor： Nitinkumar R. Patel ,  Tim M. Grewe ,  Yo Chan Son

    IPC: H02P1/04

    CPC classification number: H02P21/04 ,  B60L3/0038 ,  B60L3/06 ,  H02P21/24 ,  H02P29/032 ,  Y02T10/643

    Abstract: A method for operation of an internal permanent magnet motor having a rotor includes determining whether a neutral point access signal is received from the rotor and operating the internal permanent magnet motor using sensorless signals corresponding to a rotor position and a rotor speed derived by a first sensorless signal estimation method when the neutral point access signal is received, wherein the first sensorless signal estimation method utilizes the neutral point access signal to generate the rotor position and the rotor speed. The method further includes operating the internal permanent magnet motor using sensorless signals corresponding to a rotor position and a rotor speed derived by a second sensorless signal estimation method when the neutral point access signal is not received, wherein the second sensorless signal estimation method does not utilize the neutral point access signal to generate the rotor position and the rotor speed.

    Abstract translation: 一种具有转子的内部永磁电动机的操作方法包括：确定是否从转子接收中性点存取信号，并使用与转子位置相对应的无传感器信号和由第一无传感器导出的转子速度来操作内部永磁电动机 信号估计方法，其中所述第一无传感器信号估计方法利用所述中性点存取信号来产生转子位置和转子速度。 该方法还包括：当没有接收到中性点接收信号时，使用与转子位置相对应的无传感器信号和由第二无传感器信号估计方法导出的转子速度来操作内部永磁电动机，其中第二无传感器信号估计方法不利用 中性点存取信号产生转子位置和转子转速。

    Vector controlled motor drive system implementing pulse width modulated (PWM) waveforms
    14.
    发明授权
    Vector controlled motor drive system implementing pulse width modulated (PWM) waveforms 有权
    实现脉宽调制（PWM）波形的矢量控制电机驱动系统

    公开(公告)号：US08253360B2

    公开(公告)日：2012-08-28

    申请号：US12503591

    申请日：2009-07-15

    Applicant: Steven E. Schulz ,  Yo Chan Son ,  Nitinkumar R. Patel

    Inventor： Steven E. Schulz ,  Yo Chan Son ,  Nitinkumar R. Patel

    IPC: H02P21/00

    CPC classification number: H02P6/182 ,  B60L15/025 ,  B60L15/08 ,  B60L2200/26 ,  B60L2260/44 ,  H02P21/04 ,  H02P21/18 ,  H02P21/24 ,  H02P27/08 ,  Y02T10/643

    Abstract: A vector controlled motor drive system is provided that includes a test vector and duty cycle generator module designed to receive a set of three-phase voltage command signals and designed to generate a set of pulse width modulated (PWM) waveforms. The set of PWM waveforms comprise: a first modified switching vector signal for a first motor phase that comprises at least two test pulses over three consecutive PWM cycles. The first modified switching vector signal has a first amplitude value that changes between a high amplitude value and a low amplitude value during the three consecutive PWM cycles. A number of transitions by the first modified switching vector signal between the low amplitude value and the high amplitude value over the three consecutive PWM cycles is greater than six and less than twelve.

    Abstract translation: 提供了一个矢量控制的电机驱动系统，其包括测试矢量和占空比发生器模块，该模块设计成接收一组三相电压指令信号，并被设计成产生一组脉冲宽度调制（PWM）波形。 所述PWM波形组包括：用于第一电动机相位的第一修改的开关矢量信号，其包括在三个连续的PWM周期上的至少两个测试脉冲。 第一修改开关矢量信号具有在三个连续PWM周期期间在高振幅值和低振幅值之间变化的第一振幅值。 在三个连续PWM周期中，通过第一修改的开关矢量信号在低振幅值和高幅度值之间的转换大于6并小于12。

    METHOD AND APPARATUS FOR LOW SPEED PERMANENT MAGNET MOTOR OPERATION
    16.
    发明申请
    METHOD AND APPARATUS FOR LOW SPEED PERMANENT MAGNET MOTOR OPERATION 有权
    低速永磁电机运行方法与装置

    公开(公告)号：US20110062902A1

    公开(公告)日：2011-03-17

    申请号：US12558291

    申请日：2009-09-11

    Applicant: NITINKUMAR R. PATEL ,  YO CHAN SON

    Inventor： NITINKUMAR R. PATEL ,  YO CHAN SON

    IPC: H02P21/04 ,  H02P6/18 ,  H02P23/04

    CPC classification number: H02P6/185 ,  H02P21/04 ,  H02P21/24

    Abstract: Methods and apparatus are provided for startup of a permanent magnet alternating current (AC) motor. The method comprises the steps of detecting startup of the permanent magnet AC motor; detecting a mechanical oscillation of the permanent magnet AC motor when startup of the permanent magnet AC motor is detected; and, in response to detection of the mechanical oscillation of the permanent magnet AC motor when startup is detected, suppressing the mechanical oscillation of the permanent magnet AC motor.

    Abstract translation: 提供用于启动永磁交流（AC）电动机的方法和装置。 该方法包括以下步骤：检测永磁体AC电动机的启动; 在检测到永久磁铁AC电动机的启动时检测永久磁铁AC电动机的机械振动; 并且响应于检测到启动时永久磁铁AC电动机的机械振动的检测，抑制了永久磁铁AC电动机的机械振动。

    Electric motor stator winding temperature estimation
    17.
    发明授权
    Electric motor stator winding temperature estimation 有权
    电动机定子绕组温度估算

    公开(公告)号：US07839108B2

    公开(公告)日：2010-11-23

    申请号：US12019395

    申请日：2008-01-24

    Applicant: Nitinkumar R. Patel ,  Yo Chan Son ,  Silva Hiti ,  Steven E. Schulz

    Inventor： Nitinkumar R. Patel ,  Yo Chan Son ,  Silva Hiti ,  Steven E. Schulz

    IPC: H02H5/04

    CPC classification number: H02H7/0852

    Abstract: A temperature estimation controller and methods are provided for controlling a torque command to prevent overheating of one or more of a plurality of phases of a permanent magnet motor. The temperature estimation controller includes a low speed temperature estimation module, a transition module and a temperature dependent torque command derater block. The low speed temperature estimation module determines a stator temperature of each of a plurality of phases of the permanent magnet motor in response to first thermal impedances measured for each of the plurality of phases with respect to a thermal neutral. The transition module is coupled to the low speed temperature estimation module and outputs the stator temperature of each of a plurality of phases of the permanent magnet motor as determined by the low speed temperature estimation module when a detected speed of the permanent magnet motor is less than a first predetermined speed. The temperature dependent torque command derater block is coupled to the transition module and derates the torque command in response to the stator temperature of one or more of the plurality of phases.

    Abstract translation: 提供了一种用于控制转矩指令以防止永磁电动机的多相中的一个或多个相的过热的温度估计控制器和方法。 温度估计控制器包括低速温度估计模块，过渡模块和与温度相关的转矩指令减排模块。 低速温度估计模块响应于相对于热中性点对多个相中的每一个测量的第一热阻而确定永磁电动机的多相的每个相的定子温度。 当所述永磁电动机的检测速度小于所述低速温度估计模块时，所述过渡模块耦合到所述低速温度估计模块，并且输出由所述低速温度估计模块确定的所述永磁电动机的多个相中的每一个的定子温度。 第一预定速度。 与温度相关的转矩指令转换器模块耦合到转换模块，并响应于多个相位中的一个或多个的定子温度降低转矩指令。

    Oil pump systems and methods for preventing torque overload in motors of oil pump systems
    19.
    发明授权
    Oil pump systems and methods for preventing torque overload in motors of oil pump systems 有权
    油泵系统和油泵系统电机扭矩过载的方法

    公开(公告)号：US07508149B2

    公开(公告)日：2009-03-24

    申请号：US11759274

    申请日：2007-06-07

    Applicant: Nitinkumar R. Patel

    Inventor： Nitinkumar R. Patel

    IPC: H02P7/00 ,  H02P21/14

    CPC classification number: F04C23/02 ,  F04B17/03 ,  F04B49/06 ,  F04B2203/0207 ,  F04C14/08 ,  F04C2240/808 ,  F04C2240/81 ,  F04C2270/03 ,  F04C2270/70 ,  F04C2270/80 ,  H02P23/14 ,  H02P29/032

    Abstract: Methods and apparatus are provided for preventing a voltage overload condition of an alternating current (“AC”) motor electrically coupled to an inverter. In an embodiment, the system includes an oil pump, a motor in communication with the oil pump, an inverter module in electrical communication with the motor, the inverter module configured to generate a speed command, and a controller module. The controller module is in communication with the inverter module and the motor and is configured to determine an error, based, in part, on an estimated torque value of the motor and a predetermined maximum available torque value, to convert the error into a first value, to limit the first value between a negative value and zero, and to add the first value to the speed command from the inverter to thereby generate a final speed command for the motor.

    Abstract translation: 提供了用于防止与逆变器电耦合的交流（“AC”）电动机的电压过载状态的方法和装置。 在一个实施例中，系统包括油泵，与油泵连通的电动机，与电动机电连通的逆变器模块，被配置为产生速度指令的逆变器模块和控制器模块。 所述控制器模块与所述逆变器模块和所述电动机通信，并且被配置为基于部分地基于所述电动机的估计转矩值和预定的最大可用转矩值来确定误差，以将所述误差转换为第一值 ，将负值和零之间的第一值进行限制，并将来自逆变器的第一值加到速度指令，从而生成电动机的最终速度指令。

    METHOD AND SYSTEM FOR MOTOR CONTROL WITH DELAY COMPENSATION
    20.
    发明申请
    METHOD AND SYSTEM FOR MOTOR CONTROL WITH DELAY COMPENSATION 有权
    具有延迟补偿的电机控制方法与系统

    公开(公告)号：US20080272732A1

    公开(公告)日：2008-11-06

    申请号：US11743718

    申请日：2007-05-03

    Applicant: Steven E. Schulz ,  Nitinkumar R. Patel ,  Bonho Bae ,  Stephen T. West

    Inventor： Steven E. Schulz ,  Nitinkumar R. Patel ,  Bonho Bae ,  Stephen T. West

    IPC: H02P27/04

    CPC classification number: H02P23/0004

    Abstract: Methods and systems are provided for controlling an electric machine via an inverter while compensating for one or more hardware delays. The method includes receiving a control signal, producing a first sampling signal based on the control signal, and adjusting the sampling signal to compensate for a first delay of the one or more hardware delays. The inverter is operable to produce a voltage signal based on the control signal, and the electric machine is operable to produce a current based on the voltage signal. A sampling of the current is performed based on the first sampling signal.

    Abstract translation: 提供了用于通过反相器控制电机的方法和系统，同时补偿一个或多个硬件延迟。 该方法包括接收控制信号，基于控制信号产生第一采样信号，以及调整采样信号以补偿一个或多个硬件延迟的第一延迟。 逆变器可操作以基于控制信号产生电压信号，并且电机可操作以基于电压信号产生电流。 基于第一采样信号执行电流的采样。

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