CURRENT SOURCE CONVERTER-BASED WIND ENERGY SYSTEM
    51.
    发明申请
    CURRENT SOURCE CONVERTER-BASED WIND ENERGY SYSTEM 有权
    基于电流转换器的风力发电系统

    公开(公告)号:US20100025995A1

    公开(公告)日:2010-02-04

    申请号:US12183816

    申请日:2008-07-31

    Abstract: Power conversion apparatus and methods are presented for providing electrical power to a grid or other load in which a synchronous machine is driven by a wind turbine or other prime mover to provide generator power to a switching type current source converter (CSC), with a current source rectifier (CSR) of the CSC being switched to provide d-axis control of the synchronous machine current based on grid power factor feedback, and with a current source inverter (CSI) of the CSC being switched to provide leading firing angle control and selective employment of dumping resists to dissipate excess generator energy in a fault mode when a grid voltage drops below a predetermined level.

    Abstract translation: 提供了电力转换装置和方法,用于向电网或其他负载提供电力,其中同步电机由风力涡轮机或其它原动机驱动以向开关型电流源转换器(CSC)提供发电机功率,电流 CSC的源极整流器(CSR)被切换以提供基于电网功率因数反馈的同步电机的d轴控制,并且CSC的电流源逆变器(CSI)被切换以提供引导触发角控制和选择性 当电网电压下降到预定水平以下时,使用倾倒抵抗在故障模式下散发过量的发电机能量。

    Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction
    54.
    发明申请
    Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction 失效
    使用具有低计算要求的直接占空比算法进行功率因数校正的并联电流模式控制

    公开(公告)号:US20080122422A1

    公开(公告)日:2008-05-29

    申请号:US11951228

    申请日:2007-12-05

    Abstract: A method and apparatus to implement parallel current mode control that is suitable for digital and analog implementation. A duty cycle algorithm is composed of a voltage term and a parallel current term which depends on the inductor current change between the inductor current value at the beginning of a switching cycle and the reference inductor current value at the end of that switching cycle. Parallel current mode control can be applied to all DC-DC converters, including both non-isolated and isolated topologies. It can also be applied to AC-DC converters with power factor correction.

    Abstract translation: 一种适用于数字和模拟实现的并行电流模式控制的方法和装置。 占空比算法由电压项和并联电流项组成,取决于开关周期开始时的电感电流值与开关周期结束时的参考电感电流值之间的电感电流变化。 并联电流模式控制可应用于所有DC-DC转换器,包括非隔离和隔离拓扑。 它也可以应用于具有功率因数校正的AC-DC转换器。

    Power converter with reduced common mode voltage
    55.
    发明授权
    Power converter with reduced common mode voltage 有权
    功率转换器具有降低的共模电压

    公开(公告)号:US07274576B1

    公开(公告)日:2007-09-25

    申请号:US11365234

    申请日:2006-03-01

    CPC classification number: H02M5/4585 H02M1/44

    Abstract: An improved power converter that produces reduced-levels of common-mode voltages, or even entirely eliminates such voltages, is disclosed herein, along with a method of reducing common-mode voltages. In at least some embodiments, the improved power converter is equipped with common-mode filter inductors and a link coupling input and output ports of the power converter with one another to communicate a ground point associated with the input ports of the converter (and the source) to the load. Further, in at least some embodiments, the method includes providing common mode filter inductors as part of the converter, where the inductors are connected at least indirectly to at least one of a rectifier and an inverter of the converter, and communicating a grounded neutral from input ports of the converter to output ports of the converter by way of at least one additional linkage.

    Abstract translation: 本文公开了一种改进的功率转换器,其产生低电平的共模电压,或甚至完全消除了这种电压,以及降低共模电压的方法。 在至少一些实施例中,改进的功率转换器配备有共模滤波电感器和将功率转换器的输入和输出端口彼此相连以将与转换器的输入端口相关联的接地点(和源 )到负载。 此外,在至少一些实施例中,该方法包括提供共模滤波电感器作为转换器的一部分,其中电感器至少间接连接到转换器的整流器和逆变器中的至少一个,并将接地的中性线从 转换器的输入端口通过至少一个额外的连接件输出到转换器的端口。

    Nine device AC-to-AC converter
    56.
    发明申请
    Nine device AC-to-AC converter 有权
    九个设备AC到AC转换器

    公开(公告)号:US20070189044A1

    公开(公告)日:2007-08-16

    申请号:US11354423

    申请日:2006-02-15

    CPC classification number: H02M5/4585 H02M5/297

    Abstract: AC-to-AC power conversion systems and methods are presented, in which a small number of asymmetrical power switching devices are used to convert input AC power to output AC power of constant or variable frequency.

    Abstract translation: 提出了AC到AC电力转换系统和方法,其中使用少量的非对称功率开关装置来将输入AC电力转换成输出恒定或可变频率的AC电力。

    Sensorless control method and apparatus for a motor drive system
    57.
    发明申请
    Sensorless control method and apparatus for a motor drive system 失效
    用于电机驱动系统的无传感器控制方法和装置

    公开(公告)号:US20050007044A1

    公开(公告)日:2005-01-13

    申请号:US10846274

    申请日:2004-05-14

    CPC classification number: H02P21/13 G05B13/048

    Abstract: A method and apparatus provide a state observer control system 600 for a motor 106 that uses an extended Kalman filter 330 to predict initial rotor position and afterwards accurately predict rotor position and/or speed under variable types of loading conditions. A control system model 300 is generated that allows variable setting of an initial rotor position to generate estimated rotor position and speed as outputs. The control system model 300 includes an EKF (extended Kalman filter) estimator 330, speed controller 322, a current controller 324, and a variable load component 310. During operation, EKF estimator 330 estimates rotor speed 327 and position 333 based on reference voltages 402, 404 and currents 1325 generated by speed and current controllers 322, 324 and input from frame transformers 326, 328. Additionally, the reference currents and voltages 402, 404, 1325 are frame-transformed to be used as feedback signals 418, 346 in the system 600 and as drive signals to control power to be applied to a motor load 602.

    Abstract translation: 一种方法和装置为电动机106提供状态观测器控制系统600,该电动机106使用扩展卡尔曼滤波器330来预测初始转子位置,然后在可变类型的负载条件下准确地预测转子位置和/或速度。 产生控制系统模型300,其允许初始转子位置的可变设置以产生估计的转子位置和速度作为输出。 控制系统模型300包括EKF(扩展卡尔曼滤波器)估计器330,速度控制器322,电流控制器324和可变负载组件310.在操作期间,EKF估计器330基于参考电压402估计转子速度327和位置333 ,404和由速度和电流控制器322,324生成的电流1325以及从帧变压器326,328输入的电流133.另外,参考电流和电压402,404,1325被帧变换以被用作反馈信号418,346。 系统600和作为驱动信号以控制施加到电动机负载602的功率。

    Integrated DC link choke and method for suppressing common-mode voltage in a motor drive
    58.
    发明授权
    Integrated DC link choke and method for suppressing common-mode voltage in a motor drive 有权
    集成式直流母线扼流圈及抑制电机驱动中共模电压的方法

    公开(公告)号:US06617814B1

    公开(公告)日:2003-09-09

    申请号:US09832389

    申请日:2001-04-11

    CPC classification number: H02M5/4585 H01F27/34 H01F37/00

    Abstract: A motor drive and a choke therefor are disclosed, wherein the choke comprises a magnetic core with an inner leg and two outer legs, and four coils, which may be connected in DC current paths in the motor drive. First and second differential coils are wound around first and second outer legs, respectively; and first and second common-mode coils are wound around the inner leg of the choke. The first and second differential coils smooth the DC current on a DC bus in the motor drive, and the first and second common-mode coils suppress common-mode voltages in the motor drive. Also disclosed is a method for suppressing common-mode voltages in a motor drive.

    Abstract translation: 公开了一种电动机驱动器和扼流器,其中扼流器包括具有内腿和两个外腿的磁芯,以及四个线圈,其可以连接在电动机驱动器中的直流电流路径中。 第一和第二差动线圈分别绕第一和第二外腿缠绕; 并且第一和第二共模线圈缠绕在扼流器的内腿上。 第一和第二差分线圈平滑电动机驱动器中的直流母线上的直流电流,并且第一和第二共模线圈抑制电动机驱动中的共模电压。 还公开了一种用于抑制电动机驱动中的共模电压的方法。

    Ring architecture for quad port bypass circuits
    59.
    发明授权
    Ring architecture for quad port bypass circuits 失效
    四端口旁路电路的环形架构

    公开(公告)号:US6055225A

    公开(公告)日:2000-04-25

    申请号:US867319

    申请日:1997-06-02

    Applicant: Bin Wu

    Inventor: Bin Wu

    CPC classification number: G06F13/4256 H04L12/42

    Abstract: A floating clock data recovery circuit may be positioned anywhere in a chain of nodes. An N+1 length series of port bypass circuits are connected such that the output port of one is connected to the input of the next port bypass circuit. N is the number of desired nodes. One of the series of port bypass circuits will be used to "control" the positioning of the signal conditioning circuitry. When the control PBC is in operation, the loop is "broken" at that node. As a result, the signal conditioning circuitry may be placed anywhere in the chain of nodes.

    Abstract translation: 浮动时钟数据恢复电路可以位于节点链中的任何位置。 连接N + 1长度的端口旁路电路,使得一个输出端口连接到下一个端口旁路电路的输入。 N是所需节点的数量。 一系列端口旁路电路将用于“控制”信号调理电路的定位。 当控制PBC正在运行时,该循环在该节点处被“断开”。 结果,信号调节电路可以被放置在节点链中的任何地方。

    Pre-booster pumping system for increasing power generation of turbine of thermal power plant

    公开(公告)号:US11280224B2

    公开(公告)日:2022-03-22

    申请号:US16828955

    申请日:2020-03-25

    Abstract: A pre-booster pumping system for increasing power generation of a turbine of a thermal power plant includes a booster pump system including an inlet end, an output end and at least one booster pump; the inlet end of the booster pump system being connected to the air draining end of the turbine through an input tube; each booster pump including an air inlet and an air outlet; the waste gas drained from the air draining end of the turbine being inputted to the booster pump; the vapor pressure being increased in the booster pump and then the vapor being outputted from the output end; and a condenser having an input end; the output end of the booster pump system being connected to the condenser through the output tube; the condenser serving to receive the waste gas from the booster pump system and cool the waste vapor as water.

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