公开(公告)号：US20250128897A1

公开(公告)日：2025-04-24

申请号：US18492082

申请日：2023-10-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Haihui Lu ,  Zhuo Liu ,  Hao Yang ,  Yuhong Huang ,  Azeddine Choumach ,  Brian M. Perreault ,  Daniel I. Lanier ,  Robert H. Schmidt

IPC: B65G67/22

Abstract: An independent cart system includes multiple track segments, multiple movers, multiple position sensors, and a controller. Each track segment includes multiple coils along a length of the track segment and a segment controller operative to selectively energize the coils to generate an electromagnetic field. Each mover includes a magnet array having multiple magnets, where the magnet array generates a magnetic field that interacts with the electromagnetic field generated by the coils to propel the mover along the track segments. The position sensors are spaced apart along the length of each track segment and generate a position feedback signal with a waveform as a function of the magnetic field generated by the magnet array on each mover. The controller is operative to receive the position feedback signal from each position sensor and to determine a unique identifier for each mover as a function of the waveform of the position feedback signal.

公开(公告)号：US20250128895A1

公开(公告)日：2025-04-24

申请号：US18492131

申请日：2023-10-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhuo Liu ,  Hao Yang ,  Haihui Lu ,  Yuhong Huang ,  Brian M. Perreault ,  Azeddine Choumach ,  Daniel I. Lanier ,  Robert H. Schmidt

IPC: B65G54/02

Abstract: A system for identifying movers in an independent cart system includes movers having at least one magnet and sensors generating a feedback signal responsive to detecting a magnetic field from the magnet as each mover travels past the sensor. A memory stores an identifier and a corresponding digital fingerprint for each mover. The stored digital fingerprint is generated as a function of the magnetic field generated by the magnet on each mover. A controller receives the feedback signal from each sensor and determines a run-time digital fingerprint for each mover corresponding to the magnetic field generated by the magnet on each mover as a function of the feedback signal. The run-time digital fingerprint is matched to one of the stored digital fingerprints, and the identifier, corresponding to the stored digital fingerprint matching the run-time fingerprint, is read from memory.

公开(公告)号：US20210075311A1

公开(公告)日：2021-03-11

申请号：US16951912

申请日：2020-11-18

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lei Jin ,  Haihui Lu ,  Ahmed S. Mohamed Sayed Ahmed ,  Rob J Miklosovic

IPC: H02M1/12 ,  H02J3/01

Abstract: For grid-connected power converter control, a method estimates a d-axis grid voltage from a d-axis reference current modified with a d-axis current and a q-axis current modified with a filter inductive reactance. The method generates a q-axis current error from a direct current (DC) voltage input and a DC bus voltage. The method estimates an observer q-axis grid voltage from a q-axis voltage output. The q-axis grid voltage observer estimates the q-axis grid voltage in a direct/quadrature (dq) reference frame equivalent to an ABC to DQ reference frame transform. The method determines a d-axis voltage output as a function of a d-axis current error and a q-axis current modified with a filter inductive reactance. The method determines a q-axis voltage output as a sum of the q-axis current controller output and the observer q-axis grid voltage.

公开(公告)号：US20170353138A1

公开(公告)日：2017-12-07

申请号：US15173767

申请日：2016-06-06

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Shaofeng Zhang ,  Haihui Lu ,  Yogesh P. Patel ,  Ahmed Mohamed Sayed Ahmed ,  Lixiang Wei ,  Richard Lukaszewski

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

CPC classification number: H02P27/06 ,  H02M1/126 ,  H02M1/32 ,  H02M1/36 ,  H02M5/4585 ,  H02M7/217 ,  H02M7/219 ,  H02M2001/0009 ,  Y02B70/1441

Abstract: Disclosed examples include power conversion systems, computer readable mediums and methods for mitigating input filter resonance, in which a controller operates an active front end (AFE) rectifier in a first mode to turn a single rectifier switching device on and off and measures a filter voltage or current signal while all of the rectifier switches are off. The controller determines a resonant frequency based on a transient response of the measured voltage or current signal, and selectively adjusts a rectifier control parameter to mitigate filter resonance based on the resonant frequency.

公开(公告)号：US09787213B2

公开(公告)日：2017-10-10

申请号：US14978571

申请日：2015-12-22

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lixiang Wei ,  Yuan Xiao ,  Haihui Lu ,  Douglas B. Weber

IPC: H02M5/458 ,  H02M7/49 ,  H02M1/32

CPC classification number: H02M5/458 ,  H02M7/49 ,  H02M2001/325

Abstract: Multilevel inverters, power cells and bypass methods are presented in which a power cell switching circuit is selectively disconnected from the power cell output, and a bypass which is closed to connect first and second cell output terminals to selectively bypass a power stage of a multilevel inverter, with an optional AC input switch to selectively disconnect the AC input from the power cell switching circuit during bypass.

公开(公告)号：US10862332B2

公开(公告)日：2020-12-08

申请号：US16357653

申请日：2019-03-19

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lei Jin ,  Haihui Lu ,  Karthik Palaniappan ,  Ahmed S. Mohamed Sayed Ahmed

IPC: H02J5/00 ,  H02J7/34 ,  G05F1/10 ,  H02J3/38 ,  H02J3/28

Abstract: For grid-connected power converter control, a method estimates a d-axis grid voltage from a d-axis reference current modified with a d-axis current, and a q-axis current modified with a filter inductive reactance. The method generates a q-axis grid voltage from a direct current (DC) voltage input modified with the DC bus voltage modified with a notch filter to balance the voltage input and further reduced with the q-axis current. The method modifies the estimated d-axis grid voltage and the q-axis grid voltage by selectively removing second-order harmonics. The method further determines a d-axis voltage output and a q-axis voltage output as a function of the modified estimated d-axis grid voltage and the modified q-axis grid voltage.

公开(公告)号：US10727772B1

公开(公告)日：2020-07-28

申请号：US16286425

申请日：2019-02-26

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lei Jin ,  Robert J. Miklosovic ,  Zhendong Zhang ,  Timothy M. Rowan ,  Haihui Lu

IPC: H02P23/12 ,  H02P23/14

Abstract: For predicting a load pattern, a method determines a torque error from a torque reference modified by a low pass filter function of the torque reference. The torque reference is one of measured from an induction machine energized by a flux current and a torque current and calculated in an induction machine controller. The method determines a torque increase pulse in response to a torque relative variation calculated from the torque error exceeding an increase threshold. In response to detecting the torque increase pulse, the method determines a change delay time from the torque relative variation and the torque increase pulse. The method further determines a change period from at least two torque increase pulses. The method increases the flux current before a change time that is predicted as a function of the change delay time and the change period.

公开(公告)号：US09998030B2

公开(公告)日：2018-06-12

申请号：US14285497

申请日：2014-05-22

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  Russel J. Kerkman ,  Richard A. Lukaszewski ,  Haihui Lu ,  Zhenhuan Yuan

IPC: H02M7/537 ,  H02P9/00 ,  G05F1/67 ,  H02M1/32 ,  G01B3/52

CPC classification number: H02M7/537 ,  G01B3/52 ,  G05F1/67 ,  H02M1/32 ,  H02P9/007

Abstract: The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.

公开(公告)号：US09880223B2

公开(公告)日：2018-01-30

申请号：US14295123

申请日：2014-06-03

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： David M. Messersmith ,  Douglas J. Bader ,  Haihui Lu ,  Thomas A. Nondahl ,  Zhenhuan Yuan

IPC: G01R31/34 ,  H02P23/14 ,  G01R27/08 ,  G01R27/26

CPC classification number: G01R31/343 ,  G01R27/08 ,  G01R27/2611 ,  H02P23/14

Abstract: A method of estimating stator resistance of an induction motor is provided. The method includes applying voltage pulses through two phase paths of the motor for a plurality of electrical cycles to inject current in the motor, wherein the voltage pulses are applied until rotor flux of the motor is substantially stabilized and measuring stator voltage and stator current in response to the applied voltage pulses for each of the plurality of electrical cycles. The method also includes calculating the stator resistance based upon the measured stator voltages and the stator currents.

公开(公告)号：US09590547B2

公开(公告)日：2017-03-07

申请号：US14696648

申请日：2015-04-27

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Haihui Lu ,  Zhenhuan Yuan ,  Lixiang Wei ,  Russel J. Kerkman ,  Richard Lukaszewski ,  Ahmed Mohamed Sayed Anmed

IPC: F03D9/00 ,  H02P9/00 ,  F03D7/02 ,  F03D7/04 ,  H02J3/38 ,  H02P9/10 ,  H02H7/06 ,  H02H7/12 ,  H02P101/15 ,  H02H9/00 ,  H02J3/00

CPC classification number: H02P9/006 ,  F03D7/0224 ,  F03D7/0284 ,  F03D7/0288 ,  F03D7/04 ,  F03D9/255 ,  H02H7/06 ,  H02H7/12 ,  H02H9/002 ,  H02J3/386 ,  H02J2003/001 ,  H02P9/007 ,  H02P9/102 ,  H02P9/48 ,  H02P2101/15 ,  Y02E10/723 ,  Y02E10/763

Abstract: A double fed induction generator (DFIG) converter, methods and computer readable mediums are presented in which rotor side current spikes are attenuated by selectively activating at least one series damping circuit to conduct current through a series damping circuit resistance coupled in series between one or more DFIG rotor leads and a grid side converter in response to a grid fault occurrence or a grid fault clearance, and selectively bypassing the series damping circuit resistance after activating the series damping circuit.

Abstract translation: 提出了一种双馈感应发电机（DFIG）转换器，方法和计算机可读介质，其中通过选择性地激活至少一个串联阻尼电路来使转子侧电流尖峰衰减，以将电流传导通过串联耦合在一个或多个 DFIG转子引线和电网侧转换器响应于电网故障发生或电网故障间隙，并且在启动串联阻尼电路之后选择性地旁路串联阻尼电路电阻。