公开(公告)号：US11594991B1

公开(公告)日：2023-02-28

申请号：US17429880

申请日：2021-01-07

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Ximing Sun ,  Jianyi Zhang

IPC: H02P21/00 ,  H02P21/22

Abstract: A robust position control method for a permanent magnet synchronous motor considering current limitation is provided. The method fully considers the influence of current limitation on a closed loop system in controller design, stability analysis and other theoretical analysis phase, can effectively overcome the influence of system disturbances including system parameters uncertainty and unknown load torque, and finally realize a control objective of accurate tracking of the motor position. More importantly, the technology is a continuous control method which can overcome the inherent chattering problem while having strong robustness of sliding mode control. Meanwhile, a controller designed by the present invention also has the advantages of simple structure, etc. The technical solution proposed by the present invention has wide practical application prospect due to the characteristics of excellent anti-disturbance capability, and simple and feasible structure.

公开(公告)号：US12088224B2

公开(公告)日：2024-09-10

申请号：US17640216

申请日：2021-05-06

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Ximing Sun ,  Jianyi Zhang

IPC: H02P6/18 ,  H02P21/00 ,  H02P21/18 ,  H02P25/022

CPC classification number: H02P21/0007 ,  H02P21/18 ,  H02P25/022 ,  H02P2207/05

Abstract: A finite time speed control method for a permanent magnet synchronous motor (PMSM) based on a fast integral terminal sliding mode and disturbance estimation comprises: firstly, determining a mathematical model of a speed loop of the PMSM under the influence of system parameters uncertainty and unknown load torque; secondly, designing an improved fast integral terminal sliding surface on the basis of the idea of terminal sliding mode control; then, proposing a disturbance estimation method based on an adaptive fuzzy system with respect to the disturbance in a PMSM system; designing a PMSM speed controller on this basis; and finally, completing the concrete implementation of the whole technical solution. The present invention designs the fast integral terminal sliding surface and a sliding mode control law to ensure that a motor speed tracking error converges to zero within finite time and enhances the rapidity of a PMSM speed regulating system.

公开(公告)号：US11695358B2

公开(公告)日：2023-07-04

申请号：US17431326

申请日：2020-10-27

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Ximing Sun ,  Jianyi Zhang

IPC: H02P21/00 ,  H02P21/13 ,  H02P21/18 ,  H02P21/22

CPC classification number: H02P21/13 ,  H02P21/18 ,  H02P21/22

Abstract: A speed control method for a permanent magnet synchronous motor considering current saturation and disturbance suppression aims to effectively ensure that a current of the motor is always within a given range to avoid the problem of control performance reduction caused by the fact that the current gets into a saturation state, ensure the safety of a system, do not need to use unavailable state variables such as motor acceleration and the like, effectively estimate and compensate disturbances including parameters uncertainty and unknown load torque disturbance existing in a permanent magnet synchronous motor system, and rapidly and accurately control a speed of the motor finally. There is no need to configure a plurality of sensors in practical industrial application, so system building costs can be reduced on the one hand, and the stability of the system can be improved on the other hand.