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    • 6. 发明授权
    • Adaptive motor drive method and apparatus including inertia estimator
    • 自适应电动机驱动方法及装置,包括惯性估计器
    • US07395124B2
    • 2008-07-01
    • US11271102
    • 2005-11-10
    • Peter B. SchmidtThomas Rehm
    • Peter B. SchmidtThomas Rehm
    • G05B13/02H02P7/00G05B11/42
    • G05B13/042
    • A method and apparatus for use with a plant drive system that receives a reference command signal and generates a torque command to drive a plant, the method for estimating plant inertia and comprising the steps of providing a reference model that models the plant, the model receiving the reference command signal and generating a model output signal as a function thereof, identifying a plant output signal, mathematically combining the reference command signal and the plant output signal to generate a first error value, mathematically combining the plant output signal and the model output signal to generate a second error value, mathematically combining the first and second error values to generate an inertia estimate value and using the inertia estimate value to modify the torque command thereby providing a modified torque command signal to drive the plant.
    • 一种与工厂驱动系统一起使用的方法和装置,其接收参考命令信号并产生用于驱动工厂的扭矩命令,用于估计工厂惯性的方法,包括以下步骤:提供对工厂进行建模的参考模型,模型接收 参考命令信号并产生作为其功能的模型输出信号,识别工厂输出信号,以数学方式组合参考命令信号和工厂输出信号以产生第一误差值,数学地组合工厂输出信号和模型输出信号 以产生第二误差值,以数学方式组合第一误差值和第二误差值以产生惯性估计值,并使用惯性估计值来修改转矩指令,从而提供改进的转矩指令信号来驱动设备。
    • 7. 发明授权
    • Method and apparatus for providing optimal acceleration feedback
    • 提供最佳加速度反馈的方法和装置
    • US07141946B2
    • 2006-11-28
    • US10662556
    • 2003-09-15
    • Thomas J. RehmPeter B. SchmidtJohn Joseph Golownia
    • Thomas J. RehmPeter B. SchmidtJohn Joseph Golownia
    • H02P5/00
    • H02P23/0004
    • A method and apparatus for use with a motor controller that receives a command velocity and that applies voltages to drive a motor at the command velocity, the apparatus comprising a dual inertia lost motion assembly including a motor and a load couplable to the motor, the lost motion assembly characterized by at least some lost motion between the motor and the load, the motor and load together characterized by a total assembly inertia, an acceleration error determiner for generating an acceleration error that is the difference between a derivative of the command velocity and a motor acceleration value and a low pass acceleration error filter filtering the acceleration error and having a gain set as a percentage of the total assembly inertia, the acceleration error filter providing the filtered signal to the controller, the controller using the filtered signal to adjust the applied voltages.
    • 一种与马达控制器一起使用的方法和装置,其接收命令速度并且以指令速度施加电压以驱动马达,所述装置包括双惯性空转组件,其包括马达和可耦合到马达的负载,所述丢失 运动组件,其特征在于电动机和负载之间的至少一些失速运动,电动机和负载联合在一起,其特征在于总组装惯量,用于产生加速度误差的加速度误差确定器,加速度误差是指令速度的导数与 电机加速度值和低通加速度误差滤波器过滤加速度误差,并将增益设置为总装配惯量的百分比,加速度误差滤波器将滤波信号提供给控制器,控制器使用滤波信号调整应用 电压。
    • 8. 发明授权
    • Method and apparatus to compensate for cyclic load disturbances in a control system
    • 用于补偿控制系统中的循环负载扰动的方法和装置
    • US06597146B1
    • 2003-07-22
    • US10072066
    • 2002-02-08
    • Thomas J. RehmPeter B. Schmidt
    • Thomas J. RehmPeter B. Schmidt
    • G05D23275
    • G05B13/021G05B5/01
    • A method and apparatus for essentially eliminating cyclic disturbances in a motor control system, the method including identifying frequencies of undesirable components in a feedback signal that exceed a threshold level and generating a combined signal including sine wave components corresponding to each of the identified frequencies, delaying the combined signal to generate a plurality of identical but phase shifted combined signals, weighting each one of the delayed signals as a function of the magnitude of an instantaneous corrected signal which is the difference between a velocity error signal and a compensation signal and adding each of the weighted signals to generate the compensation signal.
    • 一种用于基本上消除电动机控制系统中的循环干扰的方法和装置,所述方法包括识别超过阈值电平的反馈信号中的不期望分量的频率,并产生包括对应于所识别的每个频率的正弦波分量的组合信号,延迟 所述组合信号用于产生多个相同但相移的组合信号,对作为速度误差信号和补偿信号之间的差的瞬时校正信号的大小的函数对所述延迟信号中的每一个进行加权,并将每个 加权信号产生补偿信号。
    • 10. 发明授权
    • Method and apparatus for increased current stability in a PWM drive
    • 在PWM驱动中提高电流稳定性的方法和装置
    • US08330405B2
    • 2012-12-11
    • US12487012
    • 2009-06-18
    • Semyon RoyakMark M. HarbaughThomas A. NondahlJingbo LiuPeter B. SchmidtRobert J. Breitzmann
    • Semyon RoyakMark M. HarbaughThomas A. NondahlJingbo LiuPeter B. SchmidtRobert J. Breitzmann
    • H03K5/00
    • H03K17/14H02P21/00
    • The present invention provides an improved current regulator for PWM based drives for electric motors. The invention provides compensation for the rotor position signal for delays introduced due to the PWM algorithm and for digital sampling present in such a drive. Current regulator commonly operate in a two-phase reference frame, requiring forward and reverse coordinate transformations between the physical current values and the two-phase reference frame variables. The present invention provides an improved compensation in the forward transformation by determining the phase lag between the commanded voltage reference and the output voltage reference and by further compensating the forward transformation for errors introduced due to sampling the current either at different sampling instances than the rotor position or at multiple sampling instances during a carrier period. Additionally, compensation during the reverse transformation is provided to compensate for errors introduced due to sampling the current and rotor position.
    • 本发明提供一种用于电动机的基于PWM的驱动器的改进的电流调节器。 本发明为由于PWM算法引入的延迟以及在这种驱动中存在的数字采样而为转子位置信号提供补偿。 电流调节器通常在两相参考系中工作,需要在物理电流值和两相参考帧变量之间进行正向和反向坐标变换。 本发明通过确定指令的电压基准和输出电压基准之间的相位滞后来提供正向变换中的改进的补偿,并且通过进一步补偿由于在不同的采样情况下比转子位置采样电流引入的误差的正向变换 或在载波周期期间的多个采样实例。 另外,在逆变换期间的补偿被提供以补偿由于对当前和转子位置的采样引入的误差。