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：US11336206B2

公开(公告)日：2022-05-17

申请号：US17029874

申请日：2020-09-23

Applicant: Rockwell Automation Technologies, Inc.

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

IPC: H02M7/5387 ,  H02M1/088 ,  H02M5/458 ,  H02P27/08

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：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.

公开(公告)号：US20240345178A1

公开(公告)日：2024-10-17

申请号：US18299655

申请日：2023-04-12

Applicant: Rockwell Automation Technologies, Inc.

Inventor： John Zhuo Liu ,  Jasper Hao Yang ,  Julie Haihui Lu ,  Yujia Cui ,  Kadir Liano ,  Tim Liu ,  George Cheng ,  Navid Zargari ,  Bijan SayyarRodsari ,  Jiangang Hu

IPC: G01R31/52 ,  G01R31/08

CPC classification number: G01R31/52 ,  G01R31/088

Abstract: For transformer fault detection, a method generates a transition region that separates a health region and a fault region in a two-dimensional feature space of two feature indicators for a plurality of operation conditions using a fault detection model for a power transformer type. The method determines the feature indicators of a given power transformer of the power transformer type. The method determines whether the feature indicators in the transition region satisfy a fault condition. The method predicts an inter-turn short fault for the given power transformer in response to satisfying the fault condition or the feature indicators being in the fault region.

公开(公告)号：US20230400845A1

公开(公告)日：2023-12-14

申请号：US17839004

申请日：2022-06-13

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Yujia Cui ,  Jiangang Hu ,  Rangarajan Tallam ,  Robert J. Miklosovic

IPC: G05B23/02

CPC classification number: G05B23/0283

Abstract: An industrial system and a method including using a processor, estimating a reliability of a component of an industrial system using a prognostic model program, using the processor, updating weighting vector parameters of the prognostic model program based on collected data and a previous reliability estimate using machine learning, and using the processor, selectively generating a warning based on comparison of the reliability with a threshold and/or deviation of weighting vector parameters.