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    DC pre charge circuit
    53.
    发明授权
    DC pre charge circuit 有权
    直流预充电电路

    公开(公告)号：US09553533B2

    公开(公告)日：2017-01-24

    申请号：US14721814

    申请日：2015-05-26

    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

    Inventor： Bruce W. Weiss ,  Doyle F. Busse ,  Jeremy J. Keegan ,  Lixiang Wei ,  Michael W. Loth ,  Rangarajan M. Tallam ,  Yogesh Patel

    IPC: H02M7/537 ,  H02P6/20 ,  H02H7/09 ,  H02P6/04 ,  H02M7/48

    CPC classification number: H02P6/20 ,  H02H7/09 ,  H02M7/48 ,  H02M7/537 ,  H02P6/04 ,  H02P6/28

    Abstract: Systems and methods are provided for pre-charging the DC bus on a motor drive. Pre-charging techniques involve pre-charge circuitry including a manual switch, an automatic switch, and pre-charge control circuitry to switch the automatic switch between pre-charge and pre-charge bypass modes in response to an initialized pre-charge operation, input voltage sags, and so forth. In some embodiments, the pre-charge operation may be initialized by switching the manual switch closed. In some embodiments, the pre-charge operation may also be initialized by a detected voltage sag on the DC bus. The pre-charge circuitry may also be configured to disconnect to isolate a motor drive from the common DC bus under certain fault conditions.

    Abstract translation: 提供的系统和方法用于在电机驱动器上对DC总线进行预充电。 预充电技术涉及预充电电路，包括手动开关，自动开关和预充电控制电路，以响应于初始化的预充电操作，输入的预充电和预充电旁路模式来切换自动开关 电压骤降​​等。 在一些实施例中，预充电操作可以通过关闭手动开关来初始化。 在一些实施例中，预充电操作也可以由DC总线上的检测到的电压暂降来初始化。 预充电电路还可以被配置为在某些故障条件下将电动机驱动器与公共DC总线隔离。

    OPEN LOOP PHASE PRE-CHARGE
    56.
    发明申请
    OPEN LOOP PHASE PRE-CHARGE 有权

    公开(公告)号：US20220103090A1

    公开(公告)日：2022-03-31

    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: H02M7/217 ,  H02P27/06 ,  H02M1/08

    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.

    Automatic system grounding condition detection
    57.
    发明授权
    Automatic system grounding condition detection 有权

    公开(公告)号：US10725116B2

    公开(公告)日：2020-07-28

    申请号：US15861886

    申请日：2018-01-04

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Lixiang Wei ,  Jiangang Hu ,  Jeffrey D. McGuire

    IPC: H02P29/024 ,  G01R31/50 ,  G06F17/11 ,  H02H7/08

    Abstract: A method and controller to automatically determine a grounding condition of a motor drive, in which an inverter is operated at a predetermined frequency while a load resistor is connected between a single phase of a motor drive inverter output and a reference node, a leakage flux linkage value is computed according to a neutral-ground voltage of the motor drive, and a processor determines whether the motor drive is solid grounded, high-resistance grounded, or floating according to the leakage flux linkage value. In certain examples, the processor automatically turns the inverter off while the load resistor is connected between the single phase of the inverter output and the reference node, and automatically determines whether the motor drive is delta corner grounded according to the neutral-ground voltage.

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