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13 条记录 (耗时 0.018 秒)

    Two-stage single phase bi-directional PWM power converter with DC link capacitor reduction
    1.
    发明授权
    Two-stage single phase bi-directional PWM power converter with DC link capacitor reduction 有权
    具有直流链路电容的两级单相双向PWM功率转换器

    公开(公告)号：US09071141B2

    公开(公告)日：2015-06-30

    申请号：US13441246

    申请日：2012-04-06

    申请人： Dong Dong ,  Dushan Boroyevich ,  Ruxi Wang ,  Fred Wang

    发明人： Dong Dong ,  Dushan Boroyevich ,  Ruxi Wang ,  Fred Wang

    IPC分类号： H02M7/797 ,  H02M3/158 ,  H02M7/48 ,  H02J1/10 ,  H02J3/32 ,  H02M1/00 ,  H02J3/38

    CPC分类号： H02M3/1582 ,  H02J1/10 ,  H02J3/32 ,  H02J3/383 ,  H02J3/386 ,  H02M7/48 ,  H02M7/797 ,  H02M2001/007 ,  Y02B70/1425 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E10/763

    摘要： DC link capacitance in a bi-directional AC/DC power converter using a full-bridge or H-bridge switching circuit can be greatly reduced and the power density of the power converter correspondingly increased by inclusion of a bi-directional synchronous rectifier (SR) DC/DC converter as a second stage of the power converter and controlling the second stage with a control loop having a transfer function common to both buck and boost modes of operation of the bi-directional SR DC/DC converter and a resonant transfer function to increase gain at the ripple voltage frequency (twice the AC line frequency) to control the duty cycle of the switches of the bi-directional SR DC/DC stage and controlling the duty cycle of the switches of the full-bridge or H-bridge switching circuit using a control loop including a notch filter at the ripple voltage frequency.

    摘要翻译： 使用全桥或H桥开关电路的双向AC / DC电力转换器中的直流链路电容可以大大降低，并且功率转换器的功率密度通过包括双向同步整流器（SR）而相应地增加， DC / DC转换器作为功率转换器的第二级，并且利用具有与双向SR DC / DC转换器的降压和升压工作模式共同的传递函数的控制回路来控制第二级，并且共振传递函数 在纹波电压频率（交流线路频率的两倍）下增加增益，以控制双向SR DC / DC级的开关占空比，并控制全桥或H桥开关开关的占空比 使用包括纹波电压频率的陷波滤波器的控制回路。

    Five level high power motor drive converter and control system
    2.
    发明授权
    Five level high power motor drive converter and control system 失效
    五级大功率电机驱动转换器及控制系统

    公开(公告)号：US6058031A

    公开(公告)日：2000-05-02

    申请号：US108044

    申请日：1998-06-30

    申请人： James Patrick Lyons ,  Vlatko Vlatkovic ,  Paul Martin Espelage ,  Albert Andreas Maria Esser ,  Yifan Zhao ,  Fei Fred Wang, Sr.

    发明人： James Patrick Lyons ,  Vlatko Vlatkovic ,  Paul Martin Espelage ,  Albert Andreas Maria Esser ,  Yifan Zhao ,  Fei Fred Wang, Sr.

    IPC分类号： H02M7/48 ,  H02M7/487 ,  H02M7/217

    CPC分类号： H02M7/487 ,  H02M7/5395 ,  H02P27/14

    摘要： A high power motor drive converter includes: a five level hybrid NPC output power conversion stage including three NPC phase bridges having switches and coupled in a wye configuration through a converter neutral point, each NPC phase bridge receiving power on a respective direct current bus; three isolated split series-connected DC capacitor banks each coupled in parallel to a respective one of the three NPC phase bridges; and a controller for selecting switch positions with active control of neutral voltages. The controller is adapted to select switch positions using feedforward sine-triangle modulation with third harmonic injection, zero sequence injection, and/or discontinuous modulation injection.

    摘要翻译： 大功率电动机驱动转换器包括：五级混合NPC输出功率转换级，包括具有开关的三个NPC相桥，并且通过转换器中性点以叶状配置耦合，每个NPC相桥在相应的直流母线上接收功率; 三个隔离的串联连接的直流电容器组，其分别与三个NPC相桥中的相应一个并联耦合; 以及用于选择具有中性电压的主动控制的开关位置的控制器。 控制器适于使用具有三次谐波注入，零序注入和/或不连续调制注入的前馈正弦三角调制来选择开关位置。

    Multilevel PWM voltage source inverter control at low output frequencies
    3.
    发明授权
    Multilevel PWM voltage source inverter control at low output frequencies 有权
    多电平PWM电压源逆变器控制在低输出频率

    公开(公告)号：US06337804B1

    公开(公告)日：2002-01-08

    申请号：US09669273

    申请日：2000-09-26

    申请人： Eugene F. Kea ,  Fei (Fred) Wang ,  James M. Nowak ,  David Smith

    发明人： Eugene F. Kea ,  Fei (Fred) Wang ,  James M. Nowak ,  David Smith

    IPC分类号： H02M75387

    CPC分类号： H02M7/487

    摘要： A multilevel voltage source inverter and related control scheme in which a VSI controller operates in a low frequency mode of operation below a threshold operating frequency to more evenly distribute the duty cycle and thermal loss of the VSI switches. The technique makes use of multiple alternative switching states which achieve the same output voltage.

    摘要翻译： 一种多电平电压源逆变器及相关控制方案，其中VSI控制器在低于阈值工作频率的低频工作模式下工作，以更均匀地分配VSI开关的占空比和热损耗。 该技术利用实现相同输出电压的多种替代开关状态。

    Use of PLL stability for islanding detection
    4.
    发明授权
    Use of PLL stability for islanding detection 有权
    使用PLL稳定性进行孤岛检测

    公开(公告)号：US08823416B2

    公开(公告)日：2014-09-02

    申请号：US13182978

    申请日：2011-07-14

    申请人： Timothy N. Thacker ,  Dushan Boroyevich ,  Fred Wang ,  Rolando Burgos

    发明人： Timothy N. Thacker ,  Dushan Boroyevich ,  Fred Wang ,  Rolando Burgos

    IPC分类号： H03L7/085 ,  H02J3/38

    CPC分类号： H03L7/085 ,  H02J3/382 ,  H02J3/383 ,  H02J3/386 ,  H02J2003/388 ,  Y02E10/563 ,  Y02E10/763 ,  Y10T307/735

    摘要： A phase detector for a phase-locked loop includes a phase detector that is configured to become unstable, oscillate and drift rapidly in frequency in a predictable manner when a reference frequency signal is not available. When applied, for example, to a power converter connected to a power distribution grid, the predictable oscillatory and rapid frequency drift behavior when the phase detector is unstable allows very rapid and reliable detection of disconnection from the grid, referred to as islanding.

    摘要翻译： 用于锁相环的相位检测器包括相位检测器，其被配置为当参考频率信号不可用时以可预测的方式变得不稳定，振荡和快速漂移。 当应用于例如连接到配电网的功率转换器时，当相位检测器不稳定时，可预测的振荡和快速频率漂移行为允许非常快速和可靠地检测到被称为孤岛的电网断开。

    TWO-STAGE SINGLE PHASE BI-DIRECTIONAL PWM POWER CONVERTER WITH DC LINK CAPACITOR REDUCTION
    5.
    发明申请
    TWO-STAGE SINGLE PHASE BI-DIRECTIONAL PWM POWER CONVERTER WITH DC LINK CAPACITOR REDUCTION 有权
    具有直流链路电容减少的两级单相双向PWM功率转换器

    公开(公告)号：US20120257429A1

    公开(公告)日：2012-10-11

    申请号：US13441246

    申请日：2012-04-06

    申请人： Dong Dong ,  Dushan Boroyevich ,  Ruxi Wang ,  Fred Wang

    发明人： Dong Dong ,  Dushan Boroyevich ,  Ruxi Wang ,  Fred Wang

    IPC分类号： H02M7/217 ,  H02M7/5387

    CPC分类号： H02M3/1582 ,  H02J1/10 ,  H02J3/32 ,  H02J3/383 ,  H02J3/386 ,  H02M7/48 ,  H02M7/797 ,  H02M2001/007 ,  Y02B70/1425 ,  Y02E10/563 ,  Y02E10/566 ,  Y02E10/763

    摘要： DC link capacitance in a bi-directional AC/DC power converter using a full-bridge or H-bridge switching circuit can be greatly reduced and the power density of the power converter correspondingly increased by inclusion of a bi-directional synchronous rectifier (SR) DC/DC converter as a second stage of the power converter and controlling the second stage with a control loop having a transfer function common to both buck and boost modes of operation of the bi-directional SR DC/DC converter and a resonant transfer function to increase gain at the ripple voltage frequency (twice the AC line frequency) to control the duty cycle of the switches of the bi-directional SR DC/DC stage and controlling the duty cycle of the switches of the full-bridge or H-bridge switching circuit using a control loop including a notch filter at the ripple voltage frequency.

    摘要翻译： 使用全桥或H桥开关电路的双向AC / DC电力转换器中的直流链路电容可以大大降低，并且功率转换器的功率密度通过包括双向同步整流器（SR）而相应地增加， DC / DC转换器作为功率转换器的第二级，并且利用具有与双向SR DC / DC转换器的降压和升压工作模式共同的传递函数的控制回路来控制第二级，并且共振传递函数 在纹波电压频率（交流线路频率的两倍）下增加增益，以控制双向SR DC / DC级的开关占空比，并控制全桥或H桥开关开关的占空比 使用包括纹波电压频率的陷波滤波器的控制回路。

    USE OF PLL STABILITY FOR ISLANDING DETECTION
    6.
    发明申请
    USE OF PLL STABILITY FOR ISLANDING DETECTION 有权
    用于岛屿检测的PLL稳定性的使用

    公开(公告)号：US20120013376A1

    公开(公告)日：2012-01-19

    申请号：US13182978

    申请日：2011-07-14

    申请人： Timothy N. Thacker ,  Dusban Boroyevich ,  Fred Wang

    发明人： Timothy N. Thacker ,  Dusban Boroyevich ,  Fred Wang

    IPC分类号： H03L7/06

    CPC分类号： H03L7/085 ,  H02J3/382 ,  H02J3/383 ,  H02J3/386 ,  H02J2003/388 ,  Y02E10/563 ,  Y02E10/763 ,  Y10T307/735

    摘要： A phase detector for a phase-locked loop includes a phase detector that is configured to become unstable, oscillate and drift rapidly in frequency in a predictable manner when a reference frequency signal is not available. When applied, for example, to a power converter connected to a power distribution grid, the predictable oscillatory and rapid frequency drift behavior when the phase detector is unstable allows very rapid and reliable detection of disconnection from the grid, referred to as islanding.

    摘要翻译： 用于锁相环的相位检测器包括相位检测器，其被配置为当参考频率信号不可用时以可预测的方式变得不稳定，振荡和快速漂移。 当应用于例如连接到配电网的功率转换器时，当相位检测器不稳定时，可预测的振荡和快速频率漂移行为允许非常快速和可靠地检测到被称为孤岛的电网断开。

    Method of evaluating and ensuring stability of AC/DC power systems
    8.
    发明授权
    Method of evaluating and ensuring stability of AC/DC power systems 有权
    评估和确保交流/直流电力系统稳定性的方法

    公开(公告)号：US09136773B2

    公开(公告)日：2015-09-15

    申请号：US13608213

    申请日：2012-09-10

    申请人： Rolando Burgos ,  Dushan Boroyevich ,  Fred Wang ,  Kamiar Karimi

    发明人： Rolando Burgos ,  Dushan Boroyevich ,  Fred Wang ,  Kamiar Karimi

    IPC分类号： H02M5/458 ,  H02M7/217 ,  H02M1/00

    CPC分类号： H02M5/4585 ,  H02M7/217 ,  H02M7/219 ,  H02M2001/0012

    摘要： Approximating loci of eigenvalues or characteristic gains of a return ratio matrix of a model of a multi-phase power converter circuit by the loci of the d-d and q-q elements of said synchronous frame of reference applied to said model, allows determination and assessment of stability of the circuit or forbidden operational parameters of the combination of an AC power source and a power converter at an interface thereof by application of a standard Nyquist stability criterion.

    摘要翻译： 通过应用于所述模型的所述同步参考系的dd和qq元素的轨迹，多相功率转换器电路的模型的特征值的近似轨迹或特征增益的特征增益允许确定和评估稳定性 通过应用标准奈奎斯特稳定性标准在其接口处组合AC电源和功率转换器的电路或禁止的操作参数。