公开(公告)号：US20150253381A1

公开(公告)日：2015-09-10

申请号：US14198157

申请日：2014-03-05

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Yogesh Patel ,  Lixiang Wei

IPC: G01R31/28

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.

Abstract translation: 公开了用于测试电机驱动器的系统和方法。 该技术通过不使用达因单元来增强电机驱动器测试，从而降低初始安装成本，维护成本和设置大小。 该设置可以包括整流器和逆变器，其被配置为在模拟负载下的测试期间通过产生相应的有功（P）和无功（Q）功率（例如，分别为转矩和通量）来在有功无功功率控制模式下工作。 有源无功功率控制模式可以接收期望的P和Q，并且基于期望的P和Q确定一个或多个栅极驱动信号以提供整流器和/或逆变器中的开关，其中栅极驱动信号被配置为 在模拟负载下操作整流器和/或逆变器。 栅极驱动信号可以相应地传输到整流器和/或逆变器。

公开(公告)号：US20220094259A1

公开(公告)日：2022-03-24

申请号：US17029874

申请日：2020-09-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Yujia Cui ,  Garron K. Morris ,  Lixiang Wei

IPC: H02M1/088 ,  H02M5/458

Abstract: Methods, non-transitory computer readable mediums, and power conversion systems with a controller configured to provide modulated inverter switching control signals at a first switching frequency in response to an inverter current being greater than a first threshold and less than a second threshold, the second threshold being greater than the first threshold. The controller is further configured to provide the inverter switching control signals at a second switching frequency in response to the inverter current being greater than the second threshold, and to provide the inverter switching control signals at a third switching frequency in response to the inverter current being less than the first threshold, where the second switching frequency is less than the first switching frequency and the third switching frequency is greater than the first switching frequency.

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.

公开(公告)号：US10541626B1

公开(公告)日：2020-01-21

申请号：US16247634

申请日：2019-01-15

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Jacob M. Lamb ,  Brian J. Seibel ,  Timothy M. Rowan ,  Lixiang Wei

IPC: H02M5/45 ,  H02P27/06 ,  H02M7/5387 ,  H03K3/017 ,  H02P27/08 ,  H02M5/458

Abstract: Power conversion systems and a controller thereof includes a first processing system that computes phase references for respective phase lines of an inverter according to a feedback value, a setpoint value, and a scaling factor to emulate a scaled frequency that is less than a switching frequency, and a second processing system that generates a carrier waveform having the switching frequency, receives the phase reference from the first processing system for each inverter phase line, and compares each phase reference with the carrier waveform to generate pulse width modulated switching control signals for switching devices of the inverter.

公开(公告)号：US20190204374A1

公开(公告)日：2019-07-04

申请号：US15861886

申请日：2018-01-04

Applicant: Rockwell Automation Technologies, Inc.

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

IPC: G01R31/02 ,  H02H7/08 ,  G06F17/11

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.

公开(公告)号：US10008952B1

公开(公告)日：2018-06-26

申请号：US15389670

申请日：2016-12-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Jiangang Hu ,  Lixiang Wei ,  James A. Ulrich

IPC: H02M5/42 ,  H02J7/00 ,  H02J7/34

Abstract: Power conversion systems, discharge circuits and methods are disclosed for discharging a DC bus conditioner capacitor connected between a neutral node and a first reference node in a DC bus circuit of a power conversion system, in which a DC bus voltage of the power conversion system is monitored, and a discharge control DC power supply is activated in response to the DC bus voltage transitioning below a first threshold voltage to activate a switching circuit to connect a discharge resistor between the first reference node and a DC bus terminal of the DC bus circuit to at least partially discharge the conditioner capacitor through the discharge resistor.

公开(公告)号：US20170324333A1

公开(公告)日：2017-11-09

申请号：US15149384

申请日：2016-05-09

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Yuan Xiao ,  Zhongyuan Cheng ,  Lixiang Wei ,  Navid R. Zargari

IPC: H02M3/24 ,  H02M1/36

CPC classification number: H02M3/24 ,  H02M1/12 ,  H02M1/36

Abstract: Disclosed examples include methods, power converters and damping circuits to control damping of an input filter circuit, in which a low-voltage secondary winding is wound around a common core with a primary winding connected between an AC input and a rectifier input of the converter, where the secondary winding is coupled in a series circuit with a damping resistor and a switch, and a controller selectively closes the switch with a controlled on-time at system power up and/or in response to detection of oscillation or transients in the power converter.

公开(公告)号：US09787212B2

公开(公告)日：2017-10-10

申请号：US14698925

申请日：2015-04-29

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Kevin Baumann ,  Richard Lukaszewski ,  Rangarajan Tallam ,  Lixiang Wei ,  Lee Gettelfinger ,  Garron Morris ,  Bruce Weiss ,  Neil Gollhardt ,  Navid R. Zargari ,  William Brumsickle ,  Robert Wright Reese ,  Stephen E. Denning

IPC: H02M5/458 ,  H02P27/06 ,  H02M1/08

CPC classification number: H02M5/458 ,  H02M1/08 ,  H02M5/4585 ,  H02P27/06 ,  Y02B70/1483

Abstract: Motor drive power conversion systems are provided including a rectifier and a switching inverter, wherein the switching devices of the rectifier, the inverter and/or of a DC/DC converter are silicon carbide switches, such as silicon carbide MOSFETs. Driver circuits are provided for providing bipolar gate drive signals to the silicon carbide MOSFETs, including providing negative gate-source voltage for controlling the off state of enhancement mode low side drivers and positive gate-source voltage for controlling the off state of enhancement mode high side drivers.

公开(公告)号：US20170178782A1

公开(公告)日：2017-06-22

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: H01F27/08 ,  H02M7/02 ,  H01F27/28

CPC classification number: H01F27/085 ,  H01F3/10 ,  H01F27/306

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.

公开(公告)号：US09318976B1

公开(公告)日：2016-04-19

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: H02M1/14 ,  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。