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    Method and apparatus for low speed permanent magnet motor operation
    21.
    发明授权
    Method and apparatus for low speed permanent magnet motor operation 有权
    低速永磁电机运行方法及装置

    公开(公告)号：US08339081B2

    公开(公告)日：2012-12-25

    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: H02P6/18

    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。

    REDUCTION OF SUBHARMONIC OSCILLATION AT HIGH FREQUENCY OPERATION OF A POWER INVERTER
    22.
    发明申请
    REDUCTION OF SUBHARMONIC OSCILLATION AT HIGH FREQUENCY OPERATION OF A POWER INVERTER 有权
    降低功率变换器高频运行时的次谐波振荡

    公开(公告)号：US20080197800A1

    公开(公告)日：2008-08-21

    申请号：US11676527

    申请日：2007-02-20

    Applicant: Bonho Bae ,  Nitinkumar R. Patel ,  Steven E. Schulz ,  Silva Hiti

    Inventor： Bonho Bae ,  Nitinkumar R. Patel ,  Steven E. Schulz ,  Silva Hiti

    IPC: H02P27/04

    CPC classification number: B60L15/025 ,  B60L11/1803 ,  B60L15/20 ,  B60L2210/20 ,  B60L2220/14 ,  H02P21/04 ,  Y02T10/643 ,  Y02T10/7005 ,  Y02T10/725 ,  Y02T10/7275

    Abstract: A control architecture for an electrical inverter includes a synchronous frame current regulator and a stationary frame current regulator. The stationary frame current regulator receives input currents that represent filtered versions of stationary frame currents that correspond to the inverter output currents. The control architecture employs an adaptive filter module that filters the stationary frame currents to remove the fundamental motor frequency component (and its related harmonics), thus extracting any low frequency harmonic components. The stationary frame current regulator processes the low frequency components, while the synchronous frame current regulator processes the fundamental frequency component, resulting in suppression of low frequency oscillations in the inverter output.

    Abstract translation: 用于电力逆变器的控制架构包括同步电流调节器和静止电流调节器。 静态框架电流调节器接收表示对应于逆变器输出电流的静态框电流的滤波版本的输入电流。 控制架构采用自适应滤波器模块，对固定电流进行滤波，去除基波电机频率分量（及其相关谐波），从而提取任何低频谐波分量。 静态电流调节器处理低频分量，而同步电流调节器处理基频分量，从而抑制逆变器输出中的低频振荡。

    Method and system for managing processor execution time utilizing variable frequency switching
    24.
    发明授权
    Method and system for managing processor execution time utilizing variable frequency switching 有权
    使用可变频率切换管理处理器执行时间的方法和系统

    公开(公告)号：US06979968B2

    公开(公告)日：2005-12-27

    申请号：US10676529

    申请日：2003-10-01

    Applicant: James M. Nagashima ,  Thomas P. O'Meara ,  Nitinkumar R. Patel ,  Steven E. Schulz

    Inventor： James M. Nagashima ,  Thomas P. O'Meara ,  Nitinkumar R. Patel ,  Steven E. Schulz

    IPC: H02P3/00 ,  H02P5/00 ,  H02P23/00

    CPC classification number: H02P23/0004

    Abstract: The present invention includes a method for managing processor execution time in a motor controller. The method includes receiving motor speed data, comparing the received motor speed data to predetermined motor speed ranges, determining a motor speed range based on the comparison, and modulating an inverter switching frequency of the motor controller processor based on the motor speed range. The step of receiving motor speed data may include receiving machine terminal information, processing the received machine terminal information utilizing a sensorless control algorithm, and determining motor speed data based on the processed information. The step of modulating the inverter switching frequency may include determining a modified inverter switching frequency value based on the determined motor speed range and providing the modified inverter switching frequency value to a processor control algorithm. In one embodiment, the processor control algorithm modifies the inverter switching frequency based on the modified inverter switching frequency value.

    Abstract translation: 本发明包括一种用于在马达控制器中管理处理器执行时间的方法。 该方法包括接收电动机速度数据，将接收到的电动机速度数据与预定的电动机速度范围进行比较，基于比较确定电动机速度范围，以及基于电动机速度范围来调制电动机控制器处理器的逆变器开关频率。 接收电动机速度数据的步骤可以包括接收机器终端信息，利用无传感器控制算法处理所接收的机器终端信息，以及基于处理的信息确定电动机速度数据。 调制逆变器开关频率的步骤可以包括基于所确定的电动机速度范围确定修正的逆变器开关频率值，并将修改的逆变器开关频率值提供给处理器控制算法。 在一个实施例中，处理器控制算法基于经修改的逆变器开关频率值来修改逆变器开关频率。

    Method and system of reducing inefficiencies in an internal permanent magnet motor using fuzzy logic
    26.
    发明授权
    Method and system of reducing inefficiencies in an internal permanent magnet motor using fuzzy logic 有权
    使用模糊逻辑降低内部永磁电机效率低下的方法和系统

    公开(公告)号：US06760669B2

    公开(公告)日：2004-07-06

    申请号：US09789217

    申请日：2001-02-20

    Applicant: Nitinkumar R. Patel ,  Thomas P. O'Meara

    Inventor： Nitinkumar R. Patel ,  Thomas P. O'Meara

    IPC: G01R1500

    CPC classification number: G05B13/0275 ,  H02P6/28 ,  H02P6/34

    Abstract: A method of reducing loss in an interior permanent magnet drive system is provided. A current input DC link power value is calculated. The current input DC link power value is then compared with a previous input DC link power value. A change in input DC link power value is determined from this comparison. A flux decrement value is calculated. The flux decrement value is based on the change in input DC link power value. A stator current value is generated. The stator current value is based on the flux decrement value. Finally, the stator flux current is reduced, based on the stator current value.

    Abstract translation: 提供一种降低内部永磁体驱动系统的损耗的方法。 计算电流输入DC链路功率值。 然后将当前输入的DC链路功率值与先前的输入DC链路功率值进行比较。 从该比较确定输入DC链路功率值的变化。 计算通量减量值。 通量减量值基于输入直流母线功率值的变化。 产生定子电流值。 定子电流值基于磁通量减量值。 最后，基于定子电流值，定子磁通电流减小。

    Speed control of an electrically-actuated fluid pump
    27.
    发明授权
    Speed control of an electrically-actuated fluid pump 有权
    电动液压泵的速度控制

    公开(公告)号：US08414270B2

    公开(公告)日：2013-04-09

    申请号：US12944800

    申请日：2010-11-12

    Applicant: Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

    Inventor： Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

    IPC: B62D11/02

    CPC classification number: F04B49/06 ,  F04B17/03 ,  F04B2203/0207 ,  F04B2203/0209

    Abstract: A fluid system includes a fluidic device, an electrically-actuated fluid pump having a pump motor, and a control system. The control system controls a speed of the pump using a commanded torque value, and calculates a feedforward torque term as a function of a set of operating values, including a desired fluid line pressure. The control system determines the speed control torque term using pump speed error, and adds the feedforward torque term to the speed control torque term to calculate the commanded torque value. The speed control torque term may be determined using an integral term of a proportional integral derivative (PID) portion of the control system. A method for controlling pump speed includes calculating the feedforward torque term, determining the speed control torque term using a pump speed error, and adding the feedforward torque term to the speed control torque term to calculate the commanded torque value.

    Abstract translation: 流体系统包括流体装置，具有泵电动机的电动致动流体泵和控制系统。 控制系统使用指令的扭矩值来控制泵的速度，并且计算作为包括所需流体管线压力的一组操作值的函数的前馈扭矩项。 控制系统使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。 可以使用控制系统的比例积分微分（PID）部分的积分项来确定速度控制转矩项。 一种用于控制泵速的方法包括计算前馈转矩项，使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。

    SPEED CONTROL OF AN ELECTRICALLY-ACTUATED FLUID PUMP
    29.
    发明申请
    SPEED CONTROL OF AN ELECTRICALLY-ACTUATED FLUID PUMP 有权
    电动液压泵的速度控制

    公开(公告)号：US20120121438A1

    公开(公告)日：2012-05-17

    申请号：US12944800

    申请日：2010-11-12

    Applicant: Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

    Inventor： Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

    IPC: G05D7/06 ,  F04B49/00

    CPC classification number: F04B49/06 ,  F04B17/03 ,  F04B2203/0207 ,  F04B2203/0209

    Abstract: A fluid system includes a fluidic device, an electrically-actuated fluid pump having a pump motor, and a control system. The control system controls a speed of the pump using a commanded torque value, and calculates a feedforward torque term as a function of a set of operating values, including a desired fluid line pressure. The control system determines the speed control torque term using pump speed error, and adds the feedforward torque term to the speed control torque term to calculate the commanded torque value. The speed control torque term may be determined using an integral term of a proportional integral derivative (PID) portion of the control system. A method for controlling pump speed includes calculating the feedforward torque term, determining the speed control torque term using a pump speed error, and adding the feedforward torque term to the speed control torque term to calculate the commanded torque value.

    Abstract translation: 流体系统包括流体装置，具有泵电动机的电动致动流体泵和控制系统。 控制系统使用指令的扭矩值来控制泵的速度，并且计算作为包括所需流体管线压力的一组操作值的函数的前馈扭矩项。 控制系统使用泵速度误差确定速度控制转矩项，并且将前馈转矩项加到速度控制转矩项以计算指令的转矩值。 可以使用控制系统的比例积分微分（PID）部分的积分项来确定速度控制转矩项。 一种用于控制泵速的方法包括计算前馈转矩项，使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。

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