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    DC BUS PRECHARGE SYSTEM
    2.
    发明申请
    DC BUS PRECHARGE SYSTEM 有权

    公开(公告)号：US20210359632A1

    公开(公告)日：2021-11-18

    申请号：US16874017

    申请日：2020-05-14

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： James J. Valasek ,  Nickolay Guskov ,  Gary Skibinski

    IPC: H02P27/04 ,  H02M5/42

    Abstract: A precharge system for precharging a DC bus circuit includes a first input, first and second circuit branches, and a controller, where the first circuit branch includes a first contactor between the first input and an AC to DC converter, the second circuit branch has: a disconnect switch coupled to the first input; a variable frequency drive (VFD) with an AC input coupled to the disconnect switch; an inductor coupled to an AC output of the VFD; and a second contactor coupled to the inductor. The precharge VFD provides precise control of the precharge operation such as charging time, current limiting, short-circuit and ground fault protection, monitoring DC Bus capacitance and verifies the health of the shared DC bus circuit through startup diagnostic. The controller opens the first contactor and closes the second contactor and the disconnect switch in a first mode to precharge the DC bus circuit using the VFD, and in a second mode, the controller closes the first contactor and opens the second contactor and the disconnect switch.

    DC bus precharge system
    4.
    发明授权
    DC bus precharge system 有权

    公开(公告)号：US11233475B2

    公开(公告)日：2022-01-25

    申请号：US16874017

    申请日：2020-05-14

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： James J Valasek ,  Nickolay Guskov ,  Gary Skibinski

    IPC: H02P27/04 ,  H02M5/42

    Abstract: A precharge system for precharging a DC bus circuit includes a first input, first and second circuit branches, and a controller, where the first circuit branch includes a first contactor between the first input and an AC to DC converter, the second circuit branch has: a disconnect switch coupled to the first input; a variable frequency drive (VFD) with an AC input coupled to the disconnect switch; an inductor coupled to an AC output of the VFD; and a second contactor coupled to the inductor. The precharge VFD provides precise control of the precharge operation such as charging time, current limiting, short-circuit and ground fault protection, monitoring DC Bus capacitance and verifies the health of the shared DC bus circuit through startup diagnostic. The controller opens the first contactor and closes the second contactor and the disconnect switch in a first mode to precharge the DC bus circuit using the VFD, and in a second mode, the controller closes the first contactor and opens the second contactor and the disconnect switch.

    Method and Apparatus for Reducing Radiated Emissions in Switching Power Converters
    5.
    发明申请
    Method and Apparatus for Reducing Radiated Emissions in Switching Power Converters 有权
    用于减少开关电源转换器辐射辐射的方法和装置

    公开(公告)号：US20150145463A1

    公开(公告)日：2015-05-28

    申请号：US14614080

    申请日：2015-02-04

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Zoran Vrankovic ,  Craig Winterhalter ,  Gary Skibinski

    IPC: H02P23/00 ,  H02P27/06

    CPC classification number: H02P23/28 ,  H02M1/126 ,  H02M5/458 ,  H02P27/06

    Abstract: A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.

    Abstract translation: 公开了一种用于减少诸如电动机驱动器的开关电力转换器中的辐射发射的滤波器。 开关电源转换器调制直流电压输入以产生所需的交流电压输出。 电容器在每个输出相位和公共连接之间并联连接，公共连接可以是接地连接。 选择电容器的幅度和布局以最小化由电容器传导的电流。 电容器可以是位于开关器件附近的表面贴装技术，或者电容器可以并入安装开关器件的电路板中。 滤波器可以应用于诸如逆变器部分，有源整流器部分或开关模式电源的电动机驱动器中的任何开关元件。

    SYSTEM FOR DETECTION OF A GROUND FAULT IN A HIGH RESISTANCE GROUND NETWORK
    6.
    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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