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    Open loop phase pre-charge
    1.
    发明授权
    Open loop phase pre-charge 有权

    公开(公告)号：US11984814B2

    公开(公告)日：2024-05-14

    申请号：US17033442

    申请日：2020-09-25

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Lixiang Wei ,  Peizhong Yi ,  Robert W. Reese ,  Brian P. Brown ,  Jatinkumar Patel

    IPC: H02P27/08 ,  H02M1/08 ,  H02M7/217 ,  H02P6/12 ,  H02P27/06 ,  H02M1/00

    CPC classification number: H02M7/2173 ,  H02M1/083 ,  H02P27/06 ,  H02M1/0058 ,  H02P2201/01

    Abstract: For open loop phase pre-charge, an apparatus includes a Switching Mode Power Supply (SMPS) charging diode and a charge generator. The SMPS charging diode pre-charges an SMPS to a regulation set point from at least one phase of an Alternating Current (AC) voltage. The charge generator is powered by the pre-charged SMPS. In response to detecting the regulation set point iteratively, the charge generator detects a specified phase angle of the AC voltage. In response to the specified phase angle, the charge generator iteratively generates a charging voltage during positive voltage interval that charges a Direct Current (DC) bus capacitor to a target DC bus voltage within a charging time interval. At least a portion of the charge generator comprises one or more of hardware and executable code, the executable code stored on one or more computer readable storage media.

    SYSTEM AND METHOD FOR GROUND FAULT DETECTION
    4.
    发明申请
    SYSTEM AND METHOD FOR GROUND FAULT DETECTION 有权

    公开(公告)号：US20210325478A1

    公开(公告)日：2021-10-21

    申请号：US16849230

    申请日：2020-04-15

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Jiangang Hu ,  Brian P. Brown ,  Lixiang Wei ,  Andrew J. Roberts

    IPC: G01R31/52 ,  G01R31/327 ,  G01R31/42

    Abstract: A power conversion system includes a sensing circuit to sense a system voltage of a DC bus circuit with a first DC bus terminal with a first voltage positive relative to a second voltage of a second DC bus terminal. The sensing circuit includes a first capacitor having a first terminal coupled to the second DC bus terminal, and a second terminal; a second capacitor having a first terminal coupled to the second terminal of the first capacitor, and a second terminal coupled to a reference node; and a resistive divider circuit coupled across the first capacitor and having an output terminal that delivers a voltage signal corresponding to a voltage across the first capacitor.

    PRECHARGING APPARATUS AND POWER CONVERTER
    7.
    发明申请
    PRECHARGING APPARATUS AND POWER CONVERTER 有权
    预置装置和功率转换器

    公开(公告)号：US20160204709A1

    公开(公告)日：2016-07-14

    申请号：US14596351

    申请日：2015-01-14

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Yogesh P. Patel ,  Rangarajan Tallam ,  Brian P. Brown ,  Jiangang Hu ,  James J. Campbell

    IPC: H02M5/44

    CPC classification number: H02M5/44 ,  H02H9/001 ,  H02H9/002 ,  H02M7/125 ,  H02M2001/123

    Abstract: Precharging systems and methods are presented for precharging a DC bus circuit in a power conversion system, in which precharging current is connected through a precharging resistance coupled between only a single AC input line and the DC bus circuit when the DC bus voltage is less than a non-zero threshold, and a controller individually activates controllable rectifier switching devices when the DC bus voltages greater than or equal to the threshold using DC gating or pulse width modulation to selectively provide a bypass path around the precharging resistance for normal load currents in the power conversion system.

    Abstract translation: 提出了预充电系统和方法，用于对电力转换系统中的直流总线电路进行预充电，其中当直流母线电压小于一个时，预充电电流通过仅在单个AC输入线和直流总线电路之间耦合的预充电电阻来连接 非零阈值，并且当DC总线电压大于或等于阈值时，控制器单独激活可控整流器开关器件，使用DC门控或脉冲宽度调制，以选择性地为电源中的正常负载电流提供围绕预充电电阻的旁路 转换系统

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