Active filter for power distribution system with selectable harmonic elimination

    公开(公告)号:US06549435B2

    公开(公告)日:2003-04-15

    申请号:US09815141

    申请日:2001-03-21

    IPC分类号: H02M112

    CPC分类号: H02M1/12 H02J3/01 Y02E40/22

    摘要: A power distribution system includes an ac power source; a power bus connected to the ac power source; a capacitor bank shunt-connected to the power bus; and an active filter shunt-connected to the power bus. The active filter includes current sensors, an inverter and an inverter control. Each current sensor senses current flowing through a corresponding capacitor of the capacitor bank. The inverter control, in response to the current sensors, controls the inverter to inject harmonic currents into the power bus.

    Active filter for power distribution system with selectable harmonic elimination
    2.
    发明授权
    Active filter for power distribution system with selectable harmonic elimination 失效
    配电系统有源滤波器,可选择谐波消除

    公开(公告)号:US06882549B2

    公开(公告)日:2005-04-19

    申请号:US09815141

    申请日:2001-03-21

    IPC分类号: H02J3/01 H02M1/12

    CPC分类号: H02M1/12 H02J3/01 Y02E40/22

    摘要: A power distribution system includes an ac power source; a power bus connected to the ac power source; a capacitor bank shunt-connected to the power bus; and an active filter shunt-connected to the power bus. The active filter includes current sensors, an inverter and an inverter control. Each current sensor senses current flowing through a corresponding capacitor of the capacitor bank. The inverter control, in response to the current sensors, controls the inverter to inject harmonic currents into the power bus.

    摘要翻译: 配电系统包括交流电源; 连接到交流电源的电源总线; 电容器组分流连接到电源总线; 以及分流连接到电源总线的有源滤波器。 有源滤波器包括电流传感器,逆变器和逆变器控制。 每个电流传感器感测流过电容器组的相应电容器的电流。 变频器响应于电流传感器控制逆变器将谐波电流注入电源总线。

    AC-to-ac power converter without a dc link capacitor
    3.
    发明授权
    AC-to-ac power converter without a dc link capacitor 失效
    交直流交流电源转换器,无直流链路电容

    公开(公告)号:US06839249B2

    公开(公告)日:2005-01-04

    申请号:US09759054

    申请日:2001-01-10

    IPC分类号: H02M5/458 H02M7/48 H02J3/36

    CPC分类号: H02M7/4826 H02M5/4585

    摘要: An ac-to-ac power converter includes a source-side inverter that is operated in current mode and a drive side inverter that is operated in commutation mode. The source side inverter performs current regulation during a first portion of each modulating cycle and space vector modulation during a second portion of each modulating cycle.

    摘要翻译: 交流电力转换器包括以电流模式工作的源极侧逆变器和在换向模式下工作的驱动侧逆变器。 源侧逆变器在每个调制周期的第一部分期间执行电流调节,并且在每个调制周期的第二部分期间进行空间矢量调制。

    Capacitor-assisted line commutation for induction motor drives
    4.
    发明授权
    Capacitor-assisted line commutation for induction motor drives 失效
    感应电机驱动器的电容辅助线路换向

    公开(公告)号:US5239250A

    公开(公告)日:1993-08-24

    申请号:US520093

    申请日:1983-08-04

    IPC分类号: H02J3/18 H02P27/06

    摘要: A variable speed drive system for an induction motor is disclosed which utilizes power factor correction capacitors to allow an induction motor to be driven by a line-commutated inverter using variable phase angle triggering of the thyristers in the inverter to compensate for frequency-induced changes in the operating point of the system.

    摘要翻译: 公开了一种用于感应电动机的变速驱动系统,其利用功率因数校正电容器来允许感应电动机由线性换向逆变器驱动,该逆变器使用逆变器中的可变相位角触发,以补偿频率引起的变化 系统的运行点。

    Transport-lag compensator
    5.
    发明授权
    Transport-lag compensator 有权
    运输滞后补偿器

    公开(公告)号:US06756702B1

    公开(公告)日:2004-06-29

    申请号:US10323093

    申请日:2002-12-18

    IPC分类号: H01H4700

    摘要: An electrical power system includes an electric power source providing AC power to a load. A wideband voltage controller provides a wideband control signal vector to the electric power source. A fundamental component removal module interfaces to the AC power, receiving a fundamental component Park vector of the AC voltage, and providing a resonant frequency content in Park vector format of the AC current. A narrow band voltage regulator uses a resonant component Park vector of the AC current and the resonant frequency content in Park vector format to provide a narrow band output vector signal. A dead band compensating circuit rotates narrow band output vector signal by a transport lag compensation angle to provide a compensated control signal vector to the electric power source. The wideband control signal vector and compensated control signal vector are used to regulate the AC power so that the resonant frequency content is attenuated.

    摘要翻译: 电力系统包括向负载提供AC电力的电力源。 宽带电压控制器向电源提供宽带控制信号向量。 基本元件去除模块与交流电源接口,接收交流电压的基波分量园矢量,并以交流电流的公园矢量格式提供共振频率内容。 窄带稳压器使用公共矢量格式的交流电流的谐振分量Park向量和谐振频率内容来提供窄带输出矢量信号。 死区补偿电路通过传输滞后补偿角度旋转窄带输出矢量信号,以向电源提供经补偿的控制信号向量。 宽带控制信号矢量和补偿控制信号矢量用于调节交流电源,使谐振频率含量衰减。

    Fault-tolerant variable speed induction motor drive
    6.
    发明授权
    Fault-tolerant variable speed induction motor drive 失效
    容错变速感应电机驱动

    公开(公告)号:US5568034A

    公开(公告)日:1996-10-22

    申请号:US411134

    申请日:1995-03-27

    IPC分类号: H02P21/00 H02P5/34

    CPC分类号: H02P21/00 H02P29/0243

    摘要: A drive arrangement for a fault tolerant variable speed induction motor provides a pair of current (torque and flux) command signals. The current command signals are converted to a three-phase output with sinusoidally varying signals. The three-phase output is modified to enable the motor to operate in the event one of the motor phases is open or disconnected. The modified three-phase output is used to provide first, second and third gate logic signals which are used for driving the motor.

    摘要翻译: 用于容错变速感应电动机的驱动装置提供一对电流(转矩和通量)指令信号。 电流指令信号被转换成具有正弦变化信号的三相输出。 修改三相输出以使电机在电机相位之一断开或断开的情况下运行。 改进的三相输出用于提供用于驱动电机的第一,第二和第三门逻辑信号。

    Power factor control of pulse width modulated inverter supplied
permanent magnet motor
    7.
    发明授权
    Power factor control of pulse width modulated inverter supplied permanent magnet motor 失效
    脉宽调制变频器供电永磁电机的功率因数控制

    公开(公告)号:US5428283A

    公开(公告)日:1995-06-27

    申请号:US250394

    申请日:1994-05-26

    摘要: Power factor control of a pulse width modulated inverter supplied permanent magnet motor is achieved by using Park Vectors for automatically adjusting a pulse width modulating signal for approximately unity power factor, thereby avoiding the heretofore required manual adjustment during operation of the motor for power factor changes in accordance with changes in EMF and motor resistance.

    摘要翻译: 脉冲宽度调制变频器提供的永久磁铁电机的功率因数控制是通过使用公园向量来实现的,用于自动调整脉宽调制信号,使其具有近似的单位功率因数,从而避免了电机运行期间所需的手动调整功率因数变化 符合EMF和电机电阻的变化。

    Active damper for DC generation systems
    9.
    发明授权
    Active damper for DC generation systems 失效
    直流发电系统的主动阻尼器

    公开(公告)号:US06697270B1

    公开(公告)日:2004-02-24

    申请号:US10236900

    申请日:2002-09-05

    IPC分类号: H02H700

    摘要: An electrical power system includes a switched reluctance machine/inverter adapted for providing DC power to a load; a voltage controller, which provides a control angle &thgr;C to the switched reluctance machine/inverter; an extraction module having an interface to the DC power and providing a resonant frequency content in Park vector format of a resonant frequency content at the interface; a phase locked loop, which provides a transformation angle &thgr; from the resonant frequency content in Park vector format; a resonant frequency voltage controller, which uses the resonant frequency content in Park vector format and the transformation angle &thgr; to provide a control angle &Dgr;&thgr; to the switched reluctance machine/inverter so that the control angle &thgr;C and the control angle &Dgr;&thgr; can be used to regulate the DC power and the resonant frequency content is attenuated in regulating the DC power.

    摘要翻译: 电力系统包括适于向负载提供直流电力的开关磁阻电机/逆变器; 电压控制器,其向开关磁阻电机/逆变器提供控制角θC; 提取模块,其具有与所述DC电力的接口,并且在所述接口处提供共振频率内容的Park向量格式的谐振频率内容; 锁相环,其以Park向量格式提供来自共振频率内容的变换角θ; 谐振频率电压控制器,其使用Park矢量格式的谐振频率内容和变换角θ来向开关磁阻电机/逆变器提供控制角Deltatheta,使得控制角θC和控制角Deltatheta可以用于调节 直流电力和谐振频率含量在调节直流电力时衰减。

    Voltage controller for minimizing the utility power provided to a local load site having a local power source
    10.
    发明授权
    Voltage controller for minimizing the utility power provided to a local load site having a local power source 失效
    电压控制器,用于最小化提供给具有本地电源的本地负载现场的公用电力

    公开(公告)号:US06329798B1

    公开(公告)日:2001-12-11

    申请号:US09460188

    申请日:1999-12-11

    IPC分类号: G05F170

    CPC分类号: G05F1/70 H02M1/44

    摘要: A load site voltage regulation control system. The load site receives electrical power from a utility over transmission lines. The load site also receives electrical power from a local generator unit operating with an inverter. The local generator unit and inverter arc coupled to the load by an EMI filter and a transformer. Voltage at the load is controlled by adjusting the inverter voltage using an inverter voltage command. The inverter voltage command is based on load voltage, inverter voltage, EMI filter voltage, utility supplied current, and inverter current. In one embodiment, the inverter voltage is adjusted to minimize utility supplied reactive and real power and to actively dampen EMI filter voltage, with the inverter voltage command being developed though a multi-loop PPI control system.

    摘要翻译: 负载现场电压调节控制系统。 负载现场通过传输线从公用设施接收电力。 负载现场还从使用变频器的本地发电机组接收电力。 本地发电机单元和逆变器通过EMI滤波器和变压器电弧耦合到负载。 通过使用变频器电压指令调节逆变器电压来控制负载电压。 变频器电压指令基于负载电压,逆变器电压,EMI滤波电压,公用事业供电电流和逆变电流。 在一个实施例中,调整逆变器电压以最小化所提供的无功和有功功率,并且通过多回路PPI控制系统开发逆变器电压命令来主动抑制EMI滤波器电压。