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    Repetitive servomechanism controller for uninterruptible power supply system
    1.
    发明授权
    Repetitive servomechanism controller for uninterruptible power supply system 有权
    用于不间断电源系统的重复伺服机构控制器

    公开(公告)号：US09270160B2

    公开(公告)日：2016-02-23

    申请号：US14541667

    申请日：2014-11-14

    Applicant: Liebert Corporation

    Inventor： Xian Chen

    IPC: H02M5/45 ,  H02M1/12 ,  H02J9/00 ,  H02M7/537

    CPC classification number: H02M1/12 ,  H02J9/00 ,  H02J9/062 ,  H02M7/537 ,  H02M7/53873 ,  H02M7/53875 ,  H02M2007/53876

    Abstract: A repetitive servomechanism controller for a UPS system has an inner control loop and an outer control loop. The inner control loop regulates inverter current and the outer control loop regulates inverter voltage. The outer control loop includes a repetitive controller in combination with a harmonic servomechanism controller and a feed-forward controller.

    Abstract translation: 用于UPS系统的重复伺服机构控制器具有内部控制回路和外部控制回路。 内部控制回路调节逆变器电流，外部控制回路调节逆变器电压。 外部控制回路包括与谐波伺服机构控制器和前馈控制器组合的重复控制器。

    Method to reduce inrush currents in a transformer-less rectifier uninterruptible power supply system
    2.
    发明授权
    Method to reduce inrush currents in a transformer-less rectifier uninterruptible power supply system 有权

    公开(公告)号：US10439431B2

    公开(公告)日：2019-10-08

    申请号：US15412476

    申请日：2017-01-23

    Applicant: Liebert Corporation

    Inventor： Charles F. Blair ,  Terry D. Bush ,  Xian Chen

    IPC: H02J9/06 ,  H02M1/32 ,  H02M1/36 ,  H02H7/125 ,  H02H9/00 ,  H02M5/458

    Abstract: A method reduces inrush currents in a transformer-less rectifier UPS system when an input circuit breaker of the UPS system is closed from an open position. The circuit breaker is coupled between an AC power input and an AC input of a rectifier of the UPS system and a DC output of the rectifier is coupled to a DC bus of the UPS system. Before the circuit breaker is closed, the DC bus is charged to a DC voltage having a level that is equal to a peak AC voltage level of a line-line AC voltage of AC input power to the UPS system. The rectifier is operated as an inverter to provide an AC output voltage at the AC input of the rectifier that is equal to an AC voltage at the AC power input and when it is equal, the circuit breaker is closed.

    Multiple UPS system having multi-way power tie system and intelligent power sharing control
    3.
    发明授权
    Multiple UPS system having multi-way power tie system and intelligent power sharing control 有权
    多UPS系统具有多路电力联动系统和智能电力共享控制

    公开(公告)号：US09431854B2

    公开(公告)日：2016-08-30

    申请号：US14078790

    申请日：2013-11-13

    Applicant: Liebert Corporation

    Inventor： Xian Chen ,  Brian P. Heber

    IPC: H02J7/00 ,  H02J9/00 ,  H02J9/06

    CPC classification number: H02J9/062 ,  Y10T307/62

    Abstract: A multiple UPS system includes a plurality of multi-module UPS subsystems coupled to a power tie cabinet, each multi-module UPS subsystem having a plurality of UPS modules. The power tie cabinet includes one or more controllers, collectively referred to as PTC (power tie cabinet) controls. The PTC controls periodically determine a power error message for each of the multi-module UPS subsystems and pass it to the respective multi-module UPS subsystem. A controller of the multi-module UPS subsystem uses the power error message to determine error data that is provided to a power average control loop used in control of power sharing among the UPS modules of the multi-module UPS subsystem.

    Abstract translation: 多个UPS系统包括多个耦合到功率连接柜的多模块UPS子系统，每个多模块UPS子系统具有多个UPS模块。 电源柜包括一个或多个控制器，统称为PTC（电源柜）控制器。 PTC控制器周期性地确定每个多模块UPS子系统的功率错误消息，并将其传递到相应的多模块UPS子系统。 多模块UPS子系统的控制器使用功率错误消息来确定提供给用于控制多模块UPS子系统的UPS模块之间的功率共享的功率平均控制回路的误差数据。

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