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    • 5. 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。
    • 6. 发明申请
    • Method and Apparatus for Increased Current Stability in a PWM Drive
    • PWM驱动电流稳定性的提高方法和装置
    • US20100320948A1
    • 2010-12-23
    • 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。
    • 8. 发明授权
    • Methods and apparatus for active front end filter capacitor degradation detection
    • 有源前端滤波电容劣化检测方法与装置
    • US09318944B2
    • 2016-04-19
    • US13872177
    • 2013-04-29
    • Semyon RoyakRobert J. Breitzmann
    • Semyon RoyakRobert J. Breitzmann
    • H02M7/797H02P27/06H02M1/12H02M5/44G01R31/42G01R31/02
    • H02M1/126G01R31/028G01R31/42H02M7/797H02P27/06
    • Apparatus and methods are provided for detecting degradation of delta-connected filter capacitors in an active front end (AFE) power converter, in which delta circuit capacitor leg currents are calculated based on measured branch circuit currents, and filter capacitor impedance values are computed based on the calculated leg currents as well as measured line-to-line voltages and corresponding phase angles for comparison with one or more thresholds to selectively detect degradation of the filter capacitors. Further apparatus and methods are provided for detecting degradation of Y-connected filter capacitors by computation of fundamental frequency RMS impedance values as ratios of RMS capacitor voltages and RMS circuit branch currents, and comparison of the calculated RMS impedance values with one or more thresholds.
    • 提供了用于检测有源前端(AFE)功率转换器中的三角形连接的滤波电容器的劣化的装置和方法,其中基于测量的分支电路电流计算增量电路电容器支路电流,并且基于 所计算的支路电流以及测量的线间电压和相应的相位角,以便与一个或多个阈值进行比较以选择性地检测滤波电容器的退化。 提供了另外的装置和方法,用于通过计算基频RMS阻抗值作为RMS电容电压和RMS电路支路电流的比值,以及计算的RMS阻抗值与一个或多个阈值的比较来检测Y连接的滤波电容器的劣化。
    • 10. 发明申请
    • METHODS AND APPARATUS FOR ACTIVE FRONT END FILTER CAPACITOR DEGRADATION DETECTION
    • 用于主动前端滤波电容降解检测的方法和装置
    • US20140320056A1
    • 2014-10-30
    • US13872177
    • 2013-04-29
    • Semyon RoyakRobert J. Breitzmann
    • Semyon RoyakRobert J. Breitzmann
    • H02M1/12H02P27/06H02M7/797
    • H02M1/126G01R31/028G01R31/42H02M7/797H02P27/06
    • Apparatus and methods are provided for detecting degradation of delta-connected filter capacitors in an active front end (AFE) power converter, in which delta circuit capacitor leg currents are calculated based on measured branch circuit currents, and filter capacitor impedance values are computed based on the calculated leg currents as well as measured line-to-line voltages and corresponding phase angles for comparison with one or more thresholds to selectively detect degradation of the filter capacitors. Further apparatus and methods are provided for detecting degradation of Y-connected filter capacitors by computation of fundamental frequency RMS impedance values as ratios of RMS capacitor voltages and RMS circuit branch currents, and comparison of the calculated RMS impedance values with one or more thresholds.
    • 提供了用于检测有源前端(AFE)功率转换器中的三角形连接的滤波电容器的劣化的装置和方法,其中基于测量的分支电路电流计算增量电路电容器支路电流,并且基于 所计算的支路电流以及测量的线间电压和相应的相位角,以便与一个或多个阈值进行比较以选择性地检测滤波电容器的退化。 提供了进一步的装置和方法,用于通过计算基频RMS阻抗值作为RMS电容电压和RMS电路支路电流的比值,以及计算的RMS阻抗值与一个或多个阈值的比较来检测Y连接的滤波电容器的劣化。