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    Method and Apparatus for Controlling Motor Torque
    23.
    发明申请
    Method and Apparatus for Controlling Motor Torque 有权
    用于控制电机扭矩的方法和装置

    公开(公告)号：US20110291596A1

    公开(公告)日：2011-12-01

    申请号：US12788030

    申请日：2010-05-26

    Applicant: Haihui Lu ,  David M. Messersmith

    Inventor： Haihui Lu ,  David M. Messersmith

    IPC: H02P6/10

    CPC classification number: H02P27/16 ,  H02P1/30 ,  H02P21/36

    Abstract: The subject matter disclosed herein describes a system for controlling torque in a soft starter. In particular, torque ripple is reduced when transitioning between two different operating modes of a soft starter. A soft starter may include a first operating mode, designed for improved performance during low-speed operation of a motor, and a second operating mode, designed for improved performance during high-speed operation of the motor. However, transitioning between two different operating modes may result in significant transient currents in the motor, which, in turn, produce torque in the motor. The system described herein reduces this transient torque production in the motor.

    Abstract translation: 本文公开的主题描述了一种用于控制软启动器中的扭矩的系统。 特别地，当在软启动器的两种不同操作模式之间转换时，扭矩波动减小。 软启动器可以包括第一操作模式，其被设计用于在电动机的低速操作期间提高性能，以及第二操作模式，其被设计用于在电动机的高速运行期间提高性能。 然而，在两种不同的操作模式之间的转换可能导致电动机中的显着的瞬态电流，这反过来在电动机中产生转矩。 这里描述的系统减少了马达中的这种瞬态扭矩产生。

    Induction motor analysis and control method
    24.
    发明授权
    Induction motor analysis and control method 有权
    感应电机分析与控制方法

    公开(公告)号：US07868581B2

    公开(公告)日：2011-01-11

    申请号：US12039602

    申请日：2008-02-28

    Applicant: Wei Qian ,  Haihui Lu ,  Thomas A. Nondahl

    Inventor： Wei Qian ,  Haihui Lu ,  Thomas A. Nondahl

    IPC: H02P27/16

    CPC classification number: H02P23/14 ,  H02P27/16 ,  Y10S388/917

    Abstract: An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output on each of the three phase paths, a voltage sensor coupled to two of the phase paths between the solid-state switching device and the power input, a current sensor on one of the phase paths, a processor communicatively coupled to the voltage sensor, the current sensor, and the solid state switching device; and a memory coupled to the processor. The processor may be configured to calculate a motor parameter based on a signal from the voltage sensor and a signal from the current sensor and store the calculated motor parameter in memory.

    Abstract translation: 一种感应电动机控制器，其可以包括从电力输入到功率输出的三相路径，插在电源输入端和三相路径中的每一个上的功率输出端之间的固态开关装置， 固态开关器件和功率输入之间的相位路径，在一个相位路径上的电流传感器，通信地耦合到电压传感器，电流传感器和固态开关器件的处理器; 以及耦合到处理器的存储器。 处理器可以被配置为基于来自电压传感器的信号和来自电流传感器的信号来计算电动机参数，并将计算的电动机参数存储在存储器中。

    Common mode noise reduction in converter systems through modification of single phase switching signal
    25.
    发明授权
    Common mode noise reduction in converter systems through modification of single phase switching signal 有权
    通过修改单相切换信号，转换器系统中的共模噪声降低

    公开(公告)号：US07649756B2

    公开(公告)日：2010-01-19

    申请号：US11435651

    申请日：2006-05-17

    Applicant: Russel J. Kerkman ,  Qiang Yin ,  Haihui Lu

    Inventor： Russel J. Kerkman ,  Qiang Yin ,  Haihui Lu

    IPC: H02M1/14

    CPC classification number: H02M7/5387 ,  H02M1/44 ,  H02M5/458 ,  H02M2001/123

    Abstract: A method and apparatus for reducing common mode noise in a three phase pulse width modulated (PWM) system, the method comprising the steps of receiving the first, second and third modulating waveforms, identifying one of the modulating waveforms that is at least one of instantaneously the maximum and instantaneously the minimum of the modulating waveforms as a first identified waveform, wherein comparison of the first identified waveform to the carrier signal would generate a first on-off pulse sequence associated with a phase corresponding to the first identified waveform, generating switch control signals associated with the phase corresponding to the first identified waveform that cause a modified on-off pulse sequence that is phase shifted from the first pulse sequence, using the second and third modulating waveforms to generate second and third on-off pulse sequences corresponding to the second and third phases and providing the modified pulse sequence and the second and third pulse sequences to the one of the inverter and the converter.

    Abstract translation: 一种用于降低三相脉宽调制（PWM）系统中的共模噪声的方法和装置，该方法包括以下步骤：接收第一，第二和第三调制波形，识别至少一个瞬时调制波形之一 最大和瞬时调制波形的最小值作为第一识别波形，其中第一识别波形与载波信号的比较将产生与对应于第一识别波形的相位相关联的第一开 - 关脉冲序列，产生切换控制 使用第二和第三调制波形产生与对应于第一识别波形的相位相关的信号，该第二和第三调制波形产生与第一脉冲序列对应的第二和第三开关脉冲序列， 第二和第三相，并提供修改的脉冲序列和第二和第三脉冲 序列到逆变器和转换器之一。

    INDUCTION MOTOR CONTROLLER
    26.
    发明申请
    INDUCTION MOTOR CONTROLLER 有权
    感应电动机控制器

    公开(公告)号：US20080067970A1

    公开(公告)日：2008-03-20

    申请号：US11932624

    申请日：2007-10-31

    Applicant: Wei Qian ,  Haihui Lu ,  Thomas Nondahl

    Inventor： Wei Qian ,  Haihui Lu ,  Thomas Nondahl

    IPC: H02P23/14

    CPC classification number: H02P23/14 ,  H02P27/16 ,  Y10S388/917

    Abstract: An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output on each of the three phase paths, a voltage sensor coupled to two of the phase paths between the solid-state switching device and the power output, a current sensor on one of the phase paths, a processor communicatively coupled to the voltage sensor, the current sensor, and the solid state switching device; and a memory coupled to the processor. The processor may be configured to calculate a motor parameter based on a signal from the voltage sensor and a signal from the current sensor and store the calculated motor parameter in memory.

    Abstract translation: 一种感应电动机控制器，其可以包括从电力输入到功率输出的三相路径，插在电源输入端和三相路径中的每一个上的功率输出端之间的固态开关装置， 固态开关器件和功率输出之间的相位路径，一个相位路径上的电流传感器，通信地耦合到电压传感器，电流传感器和固态开关器件的处理器; 以及耦合到处理器的存储器。 处理器可以被配置为基于来自电压传感器的信号和来自电流传感器的信号来计算电动机参数，并将计算的电动机参数存储在存储器中。

    Method and apparatus for controlling motor torque
    29.
    发明授权
    Method and apparatus for controlling motor torque 有权
    用于控制电机转矩的方法和装置

    公开(公告)号：US08519662B2

    公开(公告)日：2013-08-27

    申请号：US12788030

    申请日：2010-05-26

    Applicant: Haihui Lu ,  David M. Messersmith

    Inventor： Haihui Lu ,  David M. Messersmith

    IPC: H02P1/24

    CPC classification number: H02P27/16 ,  H02P1/30 ,  H02P21/36

    Abstract: The subject matter disclosed herein describes a system for controlling torque in a soft starter. In particular, torque ripple is reduced when transitioning between two different operating modes of a soft starter. A soft starter may include a first operating mode, designed for improved performance during low-speed operation of a motor, and a second operating mode, designed for improved performance during high-speed operation of the motor. However, transitioning between two different operating modes may result in significant transient currents in the motor, which, in turn, produce torque in the motor. The system described herein reduces this transient torque production in the motor.

    Abstract translation: 本文公开的主题描述了一种用于控制软启动器中的扭矩的系统。 特别地，当在软启动器的两种不同操作模式之间转换时，扭矩波动减小。 软启动器可以包括第一操作模式，其被设计用于在电动机的低速操作期间提高性能，以及第二操作模式，设计用于在电动机的高速运行期间提高性能。 然而，在两种不同的操作模式之间的转换可能导致电动机中的显着的瞬态电流，这反过来在电动机中产生转矩。 这里描述的系统减少了马达中的这种瞬态扭矩产生。

    Control method and system with feedback indicative of load flux
    30.
    发明授权
    Control method and system with feedback indicative of load flux 有权
    控制方法和系统，反馈指示负载通量

    公开(公告)号：US08203304B2

    公开(公告)日：2012-06-19

    申请号：US11897871

    申请日：2007-08-31

    Applicant: Haihui Lu ,  David M. Messersmith ,  Thomas A. Nondahl

    Inventor： Haihui Lu ,  David M. Messersmith ,  Thomas A. Nondahl

    IPC: H02P1/28 ,  H02M7/155

    CPC classification number: H02P23/0004

    Abstract: Systems, methods, and devices are disclosed, including an induction-motor controller having a phase path; a solid-state switch interposed on the phase path; and a controller coupled to the solid-state switch. In certain embodiments, the controller is configured to switch the solid-state switch so that the solid-state switch is conductive during a conduction angle of a cycle of an incoming AC power waveform conveyed by the phase path, calculate the conduction angle based on a generally sinusoidal reference value that has a frequency lower than a frequency of the incoming AC power waveform, and adjust the generally sinusoidal reference value based on a value indicative of flux in a load coupled to the phase path.

    Abstract translation: 公开了包括具有相位路径的感应电动机控制器的系统，方法和装置; 插在相位路径上的固态开关; 以及耦合到固态开关的控制器。 在某些实施例中，控制器被配置为切换固态开关，使得固态开关在由相位路径传送的输入AC功率波形的周期的导通角期间导通，基于 具有低于输入AC功率波形的频率的频率的大致正弦参考值，并且基于表示耦合到相位路径的负载中的通量的值来调整大致正弦参考值。

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