公开(公告)号：US11817809B2

公开(公告)日：2023-11-14

申请号：US17992946

申请日：2022-11-23

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zicheng Liu ,  Lanlan Fang ,  She Yan ,  Dong Jiang

IPC: H02P29/028 ,  G01R31/34 ,  G05B23/02

CPC classification number: H02P29/028 ,  G01R31/343 ,  G05B23/0229 ,  G05B23/0254 ,  H02K2213/03

Abstract: The disclosure discloses a motor driving system converter fault diagnosis method based on adaptive sparse filtering, and belongs to the field of driving system fault diagnosis. The disclosure applies an unsupervised learning algorithm to an application scene of converter fault diagnosis. Effective features are automatically extracted from original data, and the problem of manual feature design based on expert knowledge is solved. Meanwhile, in consideration of current fundamental period change caused by different rotation speed working conditions, rotation speed feedback is introduced, secondary sampling is carried out on current sampled at a constant frequency, it is ensured that the length of a signal input into the deep sparse filtering network is one fundamental wave period, redundant information is better removed from original data, the calculation burden is relieved, and the accuracy and rapidity of the diagnosis algorithm are improved to a certain extent.

公开(公告)号：US20230163713A1

公开(公告)日：2023-05-25

申请号：US17992946

申请日：2022-11-23

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zicheng Liu ,  Lanlan Fang ,  She Yan ,  Dong Jiang

IPC: H02P29/028 ,  G01R31/34 ,  G05B23/02

CPC classification number: H02P29/028 ,  G01R31/343 ,  G05B23/0229 ,  G05B23/0254 ,  H02K2213/03

Abstract: The disclosure discloses a motor driving system converter fault diagnosis method based on adaptive sparse filtering, and belongs to the field of driving system fault diagnosis. The disclosure applies an unsupervised learning algorithm to an application scene of converter fault diagnosis. Effective features are automatically extracted from original data, and the problem of manual feature design based on expert knowledge is solved. Meanwhile, in consideration of current fundamental period change caused by different rotation speed working conditions, rotation speed feedback is introduced, secondary sampling is carried out on current sampled at a constant frequency, it is ensured that the length of a signal input into the deep sparse filtering network is one fundamental wave period, redundant information is better removed from original data, the calculation burden is relieved, and the accuracy and rapidity of the diagnosis algorithm are improved to a certain extent.

公开(公告)号：US11342879B2

公开(公告)日：2022-05-24

申请号：US17040553

申请日：2019-03-21

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Dong Jiang ,  An Li ,  Zicheng Liu

IPC: H02P27/12

Abstract: The disclosure provides an N-phase N+1 bridge arm inverter, including: N+1 bridge arms, wherein each of the bridge arms includes an upper bridge arm power switching device and a lower bridge arm power switching device, upper node of the upper bridge arm power switching device in each of the bridge arms is connected to a DC bus voltage, lower node of the lower bridge arm power switching device is connected to a power ground, and lower node of the upper bridge arm power switching device is connected to upper node of the lower bridge arm power switching device as an output node of the bridge arm. N is a total phase number of a motor, N is an odd number, and N is greater than 3.

公开(公告)号：US10608571B2

公开(公告)日：2020-03-31

申请号：US16312750

申请日：2018-02-11

Applicant: Huazhong University of Science and Technology

Inventor： Dong Jiang ,  An Li ,  Ronghai Qu ,  Wubin Kong ,  Zixiang Yu

IPC: H02P27/08 ,  H02P21/22 ,  H02P25/18 ,  H02P25/22

Abstract: The present invention discloses an open-winding motor drive topology and a modulation method thereof. Each bridge arm includes an upper bridge arm power switching device and a lower bridge arm power switching device, an upper node of the upper bridge arm power switching device is connected to a DC bus voltage, a lower node of the lower bridge arm power switching device is connected to a power ground, and a lower node of the upper bridge arm power switching device and an upper node of the lower bridge arm power switching device are connected as an output node of the bridge arm; the output node of the first bridge arm is connected to a left node of a A-phase stator winding of the open-winding motor, the output node of the second bridge arm is connected to a right node of the A-phase stator winding and a left node of a B-phase stator winding of the open-winding motor, the output node of the third bridge arm is connected to a right node of the B-phase stator winding and a left node of a C-phase stator winding of the open-winding motor, and the output node of the fourth bridge arm is connected to a right node of the C-phase stator winding of the open-winding motor. The invention improves the power density of the drive, thereby ensuring the working performance of the motor.