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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.

    Power conversion system and filter therefor
    3.
    发明授权
    Power conversion system and filter therefor 有权

    公开(公告)号：US10476381B1

    公开(公告)日：2019-11-12

    申请号：US16188647

    申请日：2018-11-13

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Christian S. Sartler ,  Jeremy J. Keegan ,  James A. Ulrich ,  Amanda D. Steven ,  Lixiang Wei

    IPC: H02M1/44 ,  H02M5/458 ,  H03H7/01 ,  H02P27/08 ,  H02M7/00

    Abstract: Power conversion systems and filters therefor include conductive busbars, a first low frequency capacitor circuit coupled with the busbars at a first location proximate a filter input, a first inductor circuit with common mode cores extending around the busbars at a second location between the first location and a filter output, a second low frequency capacitor circuit coupled with the busbars at a third location between the second location and the filter output, a second inductor circuit with second common mode cores extending around the busbars at a fourth location between the third location and the filter output, a third low-frequency capacitor circuit coupled with the busbars at a fifth location between the fourth location and the filter output, and a high frequency fourth capacitor circuit, coupled with one of the busbars at the fifth location.

    Compact inductor
    4.
    发明授权
    Compact inductor 有权

    公开(公告)号：US10217555B2

    公开(公告)日：2019-02-26

    申请号：US14972588

    申请日：2015-12-17

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Xikai Sun ,  Wei Qian ,  Shaofeng Zhang ,  Haihui Lu ,  Lixiang Wei ,  Yuan Xiao ,  Jiangang Hu ,  Richard A. Lukaszewski

    IPC: H01F27/28 ,  H01F27/08 ,  H01F3/10 ,  H01F27/30

    Abstract: For reducing volume requirements and magnetic flux leakage, a compact inductor includes a first planar core with a first core thickness along a first axis orthogonal to a plane of the first planar core. In addition, the inductor includes a second planar core disposed parallel to the first planar core with a second core thickness along the first axis. The inductor further includes a plurality of electrical windings disposed between and adjacent to an inside plane of the first planar core and an inside plane of the second planar core. The electrical windings may include insulated electrical wires. No magnetic teeth may be disposed between the first planar core and the second planar core. The first axis is parallel to a magnetic axis of each electrical winding.

    Common voltage reduction for active front end drives
    5.
    发明授权
    Common voltage reduction for active front end drives 有权

    公开(公告)号：US10158299B1

    公开(公告)日：2018-12-18

    申请号：US15956008

    申请日：2018-04-18

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Lixiang Wei ,  Yujia Cui

    IPC: H02M5/45 ,  H02M5/458 ,  H02M1/12

    Abstract: A power conversion system, a non-transitory computer readable medium, and a method of operating a power conversion system, in which inverter switching control signals are generated in a first mode according to an inverter carrier signal having an inverter switching frequency, and according to inverter modulation signals, to operate switches of an inverter to provide an AC output signal, and the inverter modulation signals are shifted in a second mode for low modulation index values to reduce common mode voltage.

    LCL filter resonance mitigation technique for voltage source converters
    7.
    发明授权
    LCL filter resonance mitigation technique for voltage source converters 有权

    公开(公告)号：US09819255B2

    公开(公告)日：2017-11-14

    申请号：US14566752

    申请日：2014-12-11

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Yogesh P. Patel ,  Lixiang Wei

    IPC: H02M1/12 ,  H02M7/04

    CPC classification number: H02M1/126 ,  H02M1/12 ,  H02M7/04

    Abstract: Control apparatus, techniques and computer readable mediums are presented to mitigate LCL filter resonance issue for voltage source converters. Two level voltage source converter with and without passive damping of LCL filter are selected for the comparative study. Control algorithms are presented to estimate the source impedance based on variable carrier PWM. Estimated source impedance is used to tune the control of the VSC to avoid the resonance of LCL filter has been presented. In situations in which LCL resonance cannot be avoided by tuning the control parameters, energy efficient techniques are disclosed to provide selective passive damping to facilitate continued power conversion system operation without significant adverse impact on system performance.

    Systems and methods for testing motor drives
    8.
    发明授权
    Systems and methods for testing motor drives 有权

    公开(公告)号：US09645194B2

    公开(公告)日：2017-05-09

    申请号：US14198157

    申请日：2014-03-05

    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

    Inventor： Yogesh Patel ,  Lixiang Wei

    IPC: G01R31/28 ,  G01R31/42 ,  G01R31/02

    CPC classification number: G01R31/2848 ,  G01R31/02 ,  G01R31/025 ,  G01R31/42

    Abstract: Systems and methods for testing a motor drive are disclosed. The techniques enhance motor drive testing by not using a dyne-unit, thereby reducing the initial installation costs, maintenance costs, and size of the setup. The setup may include a rectifier and an inverter configured to operate in an active-reactive power control mode during testing under a simulated load by generating the corresponding active (P) and reactive (Q) power (e.g., torque and flux, respectively). The active-reactive power control mode may receive a desired P and Q and determine one or more gate drive signals to provide to switches in the rectifier and/or the inverter based on the desired P and Q, where the gate drive signals are configured to operate the rectifier and/or the inverter under a simulated load. The gate drive signals may be transmitted to the rectifier and/or the inverter accordingly.

    ADJUSTABLE PWM METHOD TO INCREASE LOW SPEED STARTING TORQUE AND INVERTER VOLTAGE MEASUREMENT ACCURACY
    10.
    发明申请
    ADJUSTABLE PWM METHOD TO INCREASE LOW SPEED STARTING TORQUE AND INVERTER VOLTAGE MEASUREMENT ACCURACY 有权
    可调PWM方法提高低速启动转矩和逆变器电压测量精度

    公开(公告)号：US20160126861A1

    公开(公告)日：2016-05-05

    申请号：US14527804

    申请日：2014-10-30

    Applicant: Rockwell Automation Technologies, Inc.

    Inventor： Lixiang Wei ,  Jeffrey D. McGuire ,  Timothy M. Rowan

    IPC: H02M7/537

    CPC classification number: H02M7/537 ,  H02M5/4585 ,  H02M7/53875 ,  H02P27/08 ,  H03K3/017

    Abstract: Methods, control apparatus and computer readable mediums are presented for controlling a switching inverter in which a controller selectively suspends PWM carrier signals to provide inverter switching control signals using zero vectors in response to a maximal pulse width value for a present PWM half cycle being greater than a threshold value, and accumulates a present output control value for individual output phases for use in a subsequent PWM half cycle for selective effective reduction in switching frequency for low-speed operation while maintaining high frequency control loop sampling.

    Abstract translation: 提出了用于控制开关逆变器的方法，控制装置和计算机可读介质，其中控制器选择性地暂停PWM载波信号，以响应于当前PWM半周期的最大脉冲宽度值大于0而使用零向量来提供逆变器切换控制信号 并且累积用于各个输出相位的当前输出控制值，以用于随后的PWM半周期，用于在保持高频控制环路采样的同时选择性有效地降低用于低速操作的开关频率。

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