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    METHOD AND APPARATUS TO MITIGATE DC BUS OVER-VOLTAGES ON COMMON AC BUS SYSTEMS UTILIZING DC & AC DRIVES
    1.
    发明申请
    METHOD AND APPARATUS TO MITIGATE DC BUS OVER-VOLTAGES ON COMMON AC BUS SYSTEMS UTILIZING DC & AC DRIVES 有权

    公开(公告)号：US20220216800A1

    公开(公告)日：2022-07-07

    申请号：US17701543

    申请日：2022-03-22

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Gary L. Skibinski ,  Zhijun Liu

    IPC: H02M5/458 ,  H03H7/06 ,  H02P23/00

    Abstract: A line interface filter apparatus to couple a drive or group of drives to a shared multiphase AC bus, including individual phase circuits having an inductor coupled between a respective bus and drive phase lines, a tapped resistor coupled to the respective drive phase line, and a capacitor coupled between the resistor and a common connection of the capacitors of the individual phase circuits, where the capacitance of the capacitors is 5 to 15 times a per-phase equivalent capacitance of the drive or group of drives, and the resistance of the resistors is two times a damping ratio times a square root of a ratio of the filter inductance to the filter capacitance, where the damping ratio ζ is greater than or equal to 1.0 and less than or equal to 2.0.

    METHOD AND APPARATUS TO MITIGATE DC BUS OVER-VOLTAGES ON COMMON AC BUS SYSTEMS UTILIZING DC & AC DRIVES
    2.
    发明申请
    METHOD AND APPARATUS TO MITIGATE DC BUS OVER-VOLTAGES ON COMMON AC BUS SYSTEMS UTILIZING DC & AC DRIVES 有权

    公开(公告)号：US20220103086A1

    公开(公告)日：2022-03-31

    申请号：US17037979

    申请日：2020-09-30

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Zhijun Liu ,  Gary L. Skibinski

    IPC: H02M5/458 ,  H03H7/06 ,  H02P23/00

    Abstract: A method and line interface filter apparatus to couple a drive or group of drives to a shared multiphase AC bus, including individual phase circuits having an inductor coupled between a respective bus and drive phase lines, a resistor coupled to the respective drive phase line, and a capacitor coupled between the resistor and a common connection of the capacitors of the individual phase circuits, where the capacitance of the capacitors is 5 to 15 times a per-phase equivalent capacitance of the drive or group of drives, and the resistance of the resistors is two times a damping ratio times a square root of a ratio of the filter inductance to the filter capacitance, where the damping ratio is greater than or equal to 1.0 and less than or equal to 2.0.

    SYSTEM FOR DETECTION OF A GROUND FAULT IN A HIGH RESISTANCE GROUND NETWORK
    3.
    发明申请
    SYSTEM FOR DETECTION OF A GROUND FAULT IN A HIGH RESISTANCE GROUND NETWORK 审中-公开
    用于在高电压接地网络中检测地面故障的系统

    公开(公告)号：US20140225625A1

    公开(公告)日：2014-08-14

    申请号：US14252556

    申请日：2014-04-14

    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

    Inventor： Lixiang Wei ,  Zhijun Liu ,  Brian Patrick Brown ,  David W. Kirschnik ,  Russ J. Kerkman ,  Richard A. Lukaszewski ,  Gary Skibinski ,  Carlos Daniel Rodriguez-Valdez

    IPC: G01R31/02

    CPC classification number: G01R31/025 ,  H02H3/16 ,  H02H7/08

    Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.

    Abstract translation: 提供一种用于检测电压源电力转换电路中的高电阻网络中的接地故障的方法，该电压源电力转换电路包括将输入AC电力转换为施加到DC总线的DC电力的电力转换器和从DC总线转换DC电力的逆变器 输出交流电源。 该方法包括检测DC总线的低侧与地电位之间的中点到地电压，并且基于检测到的中点到地电压来检测高电阻网络中的接地故障的存在。

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