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    Method and apparatus for tracking maximum power point for inverters, for example, in photovoltaic applications
    1.
    发明授权
    Method and apparatus for tracking maximum power point for inverters, for example, in photovoltaic applications 有权
    用于跟踪逆变器的最大功率点的方法和装置，例如在光伏应用中

    公开(公告)号：US07158395B2

    公开(公告)日：2007-01-02

    申请号：US10836631

    申请日：2004-04-30

    申请人： Duo Deng ,  Anil Tuladhar ,  Kenneth J. Farkas ,  Kerry E. Grand

    发明人： Duo Deng ,  Anil Tuladhar ,  Kenneth J. Farkas ,  Kerry E. Grand

    IPC分类号： H02M7/44

    CPC分类号： G05F1/67 ,  Y02E10/58

    摘要： A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a power grid. The outer loop accommodates variations in the output of the power source, for example accommodating anomalies in IV characteristics such as IV droop characteristic associated with photovoltaic cells. The outer loop may employ a first control regime or a second control regime, for example, dependent on whether a DC bus voltage or power is smaller than a value corresponding to measurement resolution or expected noise.

    摘要翻译： 电力系统采用外部电压反馈环路和内部电流反馈环路来控制功率转换器，例如用于在电源（例如光伏阵列）和负载之间传送电力的DC至AC逆变器，例如 电网。 外部回路适应电源输出的变化，例如适应诸如与光伏电池相关联的IV下降特性的IV特性中的异常。 外环可以采用例如取决于DC总线电压或功率是否小于对应于测量分辨率或预期噪声的值的第一控制状态或第二控制状态。

    METHOD AND APPARATUS FOR CYCLE ERROR CORRECTION FOR A POWER CONVERTER DEVICE, SUCH AS AN ELECTRONIC POWER INVERTER
    2.
    发明申请
    METHOD AND APPARATUS FOR CYCLE ERROR CORRECTION FOR A POWER CONVERTER DEVICE, SUCH AS AN ELECTRONIC POWER INVERTER 失效
    用于电力转换器装置的循环错误校正的方法和装置，如电力逆变器

    公开(公告)号：US20080165555A1

    公开(公告)日：2008-07-10

    申请号：US12053783

    申请日：2008-03-24

    申请人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    发明人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    IPC分类号： H02M5/42

    CPC分类号： H02M5/458 ,  H02J9/062 ,  Y10T307/735 ,  Y10T307/852

    摘要： Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system can comprise an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.

    摘要翻译： 在电子电力系统中执行周期误差校正，以补偿AC电网侧频率和AC负载侧频率之间的差异。 电子电力系统可以包括诸如可用于不间断电源的电子功率逆变器。 对表示交流电网功率和交流负载功率的信号周期进行计数和比较，以获得周期误差值。 如果循环误差值超过第一个值以指示交流负载侧频率太高或过低，则执行补偿以将交流负载侧频率更改为更接近交流电网侧频率。 如果循环误差值低于第二值，以表示交流电网侧频率和交流负载侧频率彼此充分接近，则不使能补偿。

    Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter
    3.
    发明授权
    Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter 有权
    电力变换器等功率转换装置的周期误差校正方法和装置

    公开(公告)号：US07362600B2

    公开(公告)日：2008-04-22

    申请号：US10956736

    申请日：2004-10-01

    申请人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    发明人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    IPC分类号： H02M3/24 ,  H02M7/537 ,  H02J1/00

    CPC分类号： H02M5/458 ,  H02J9/062 ,  Y10T307/735 ,  Y10T307/852

    摘要： Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system includes an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.

    摘要翻译： 在电子电力系统中执行周期误差校正，以补偿AC电网侧频率和AC负载侧频率之间的差异。 电子电力系统包括可用于不间断电源的电子功率逆变器。 对表示交流电网功率和交流负载功率的信号周期进行计数和比较，以获得周期误差值。 如果循环误差值超过第一个值以指示交流负载侧频率太高或过低，则执行补偿以将交流负载侧频率更改为更接近交流电网侧频率。 如果循环误差值低于第二值，以表示交流电网侧频率和交流负载侧频率彼此充分接近，则不使能补偿。

    Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter
    4.
    发明授权
    Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter 失效
    电力变换器等功率转换装置的周期误差校正方法和装置

    公开(公告)号：US07545659B2

    公开(公告)日：2009-06-09

    申请号：US12053783

    申请日：2008-03-24

    申请人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    发明人： Duo Deng ,  Kenneth J. Farkas ,  Anil Tuladhar ,  Kerry E. Grand

    IPC分类号： H02J9/04

    CPC分类号： H02M5/458 ,  H02J9/062 ,  Y10T307/735 ,  Y10T307/852

    摘要： Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system can comprise an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.

    摘要翻译： 在电子电力系统中执行周期误差校正，以补偿AC电网侧频率和AC负载侧频率之间的差异。 电子电力系统可以包括诸如可用于不间断电源的电子功率逆变器。 对表示交流电网功率和交流负载功率的信号周期进行计数和比较，以获得周期误差值。 如果循环误差值超过第一个值以指示交流负载侧频率太高或过低，则执行补偿以将交流负载侧频率更改为更接近交流电网侧频率。 如果循环误差值低于第二值，以表示交流电网侧频率和交流负载侧频率彼此充分接近，则不使能补偿。

    Method and apparatus for determining a maximum power point of photovoltaic cells
    5.
    发明授权
    Method and apparatus for determining a maximum power point of photovoltaic cells 有权
    用于确定光伏电池的最大功率点的方法和装置

    公开(公告)号：US07256566B2

    公开(公告)日：2007-08-14

    申请号：US10836121

    申请日：2004-04-30

    申请人： Vijay Bhavaraju ,  Kerry E. Grand ,  Anil Tuladhar

    发明人： Vijay Bhavaraju ,  Kerry E. Grand ,  Anil Tuladhar

    IPC分类号： H01M10/44

    CPC分类号： G05F1/67 ,  Y02E10/58

    摘要： The maximum power point (MPP) of a photovoltaic array that can be coupled to power inverter is determined. A capacitor on a DC-bus side of the inverter is used as a load from which I-V characteristics of the photovoltaic array can be generated. The photovoltaic array is connected to the capacitor, which has been previously discharged by a bleed down resistor. Short circuit current, open circuit voltage, and values of current and voltage as the capacitor charges are determined and used to generate I-V characteristics of the photovoltaic array. From the I-V characteristics, the MPP can be calculated.

    摘要翻译： 确定可耦合到电力逆变器的光伏阵列的最大功率点（MPP）。 逆变器的直流母线侧的电容器被用作能够产生光伏阵列的I-V特性的负载。 光伏阵列连接到先前由泄放电阻器放电的电容器。 短路电流，开路电压以及作为电容器电荷的电流和电压值被确定并用于产生光伏阵列的I-V特性。 从I-V特性可以计算MPP。

    Ride through in electronic power converters
    6.
    发明授权
    Ride through in electronic power converters 有权
    跨越电子电源转换器

    公开(公告)号：US06900643B2

    公开(公告)日：2005-05-31

    申请号：US10637754

    申请日：2003-08-06

    申请人： Duo Deng ,  Kerry E. Grand ,  Steven J. Kowalec

    发明人： Duo Deng ,  Kerry E. Grand ,  Steven J. Kowalec

    IPC分类号： G01R31/02 ,  G01R31/08 ,  G01R31/42 ,  H02M3/00

    CPC分类号： G01R31/025 ,  G01R31/42

    摘要： A system including a current sensor to sense a current provided by an electronic power converter, the current sensor includes an output; an overcurrent detection circuit with an input coupled to an output of the current sensor; and a logic control circuit configurable to maintain the current provided by the electronic power converter in response to the sensed current having a short circuit magnitude, the logic control circuit including an input coupled to an output of the overcurrent detection circuit and at least one output coupled to at least one switch of the electronic power converter.

    摘要翻译： 一种包括用于感测由电子功率转换器提供的电流的电流传感器的系统，所述电流传感器包括输出; 具有耦合到电流传感器的输出的输入的过电流检测电路; 以及逻辑控制电路，可配置为响应于具有短路幅度的感测电流来维持由电子功率转换器提供的电流，逻辑控制电路包括耦合到过电流检测电路的输出的输入和耦合到 至少一个电子功率转换器的开关。

    Systems and methods for electric motor control
    8.
    发明授权
    Systems and methods for electric motor control 有权
    电动机控制的系统和方法

    公开(公告)号：US06815925B2

    公开(公告)日：2004-11-09

    申请号：US10293911

    申请日：2002-11-12

    申请人： Li Chen ,  Xingyi Xu ,  Vinod Reddy ,  Richard J. Hampo ,  Kerry E. Grand

    发明人： Li Chen ,  Xingyi Xu ,  Vinod Reddy ,  Richard J. Hampo ,  Kerry E. Grand

    IPC分类号： H02P124

    CPC分类号： H02P23/03 ,  B60L15/025 ,  B60L2220/12 ,  H02P21/0021 ,  H02P21/141 ,  Y02T10/643

    摘要： Systems and methods for controlling and/or calculating the torque for a field oriented induction motor operating at a given stator frequency. The systems and methods include calculating the torque using a first algorithm when the motor is at or below a first predetermined stator frequency, a second algorithm when the motor is at or above a second predetermined stator frequency, and a third algorithm when the motor is between the first predetermined stator frequency and the second predetermined stator frequency.

    摘要翻译： 用于控制和/或计算在给定定子频率下工作的场定向感应电动机的转矩的系统和方法。 所述系统和方法包括当电动机处于或低于第一预定定子频率时使用第一算法来计算扭矩，当电动机处于或高于第二预定定子频率时的第二算法，以及当电动机在 第一预定定子频率和第二预定定子频率。

    Method and apparatus for improving speed measurement quality in multi-pole machines
    9.
    发明授权
    Method and apparatus for improving speed measurement quality in multi-pole machines 有权
    提高多极机速度测量质量的方法和装置

    公开(公告)号：US07190145B2

    公开(公告)日：2007-03-13

    申请号：US10334198

    申请日：2002-12-30

    申请人： Kerry E. Grand ,  Richard J. Hampo ,  Yifan Zhao

    发明人： Kerry E. Grand ,  Richard J. Hampo ,  Yifan Zhao

    IPC分类号： G01P3/481 ,  G01P3/66 ,  H02P6/08

    CPC分类号： H02P6/17 ,  H02P6/15

    摘要： A method and apparatus for improving speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by computing speed based upon moving average techniques. In one embodiment, a moving average speed averaged over a complete interval of rotation is determined, based upon measurements of one or more magnetic pole position sensors for magnetic pole location. In another embodiment, a time interval between two poles is averaged over one or more rotational periods, and the average time interval is used to determine the moving average speed. Computation of the moving average speed reduces errors in speed measurements due to pole misalignment and may provide for smaller control adjustment times for controlling motor speed variability. In one embodiment, the speed measurement system includes a multi-pole rotor, and a controller having a capture timer and a buffer.

    摘要翻译： 教导了一种用于在具有多极机器的系统中提高速度测量质量的方法和装置。 该方法通过基于移动平均技术的计算速度来补偿极点错位。 在一个实施例中，基于用于磁极位置的一个或多个磁极位置传感器的测量来确定在完整旋转间隔上平均的移动平均速度。 在另一个实施例中，两个极点之间的时间间隔在一个或多个旋转周期上被平均，并且平均时间间隔用于确定移动平均速度。 移动平均速度的计算减少了由于极点对准引起的速度测量误差，并且可以为控制电机速度变化提供较小的控制调节时间。 在一个实施例中，速度测量系统包括多极转子和具有捕获计时器和缓冲器的控制器。