公开(公告)号：US20220123674A1

公开(公告)日：2022-04-21

申请号：US17298600

申请日：2020-08-27

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Wei XU ,  Qizhe WANG ,  Xiang LI ,  Kaiju LIAO ,  Yirong TANG ,  Yi LIU

IPC: H02P21/00 ,  H02P21/13 ,  H02P25/06

Abstract: The disclosure discloses a linear oscillatory machine control method based on an adaptive full-order displacement observer. The method includes the following steps: a full-order displacement observer is constructed; the system equivalent spring elasticity coefficient and equivalent damping coefficient are used as parameters to be identified, the full-order displacement observer serves as an adjustable model, and the machine itself serves as a reference model; an error state equation is constructed based on the error of the adjustable model and the reference model; Popov's hyperstability theory is adopted to obtain the operation upper critical frequency and the adaptive formula of adjustable parameters that make the error state equation converge; the machine is operated at a frequency lower than the upper critical frequency, the machine current and voltage signals measured during the operation process are input into the full-order displacement observer, thereby realizing frequency tracking and displacement control.

公开(公告)号：US20220060129A1

公开(公告)日：2022-02-24

申请号：US17420144

申请日：2020-04-09

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Wei XU ,  Jianqiao ZOU ,  Dinghao DONG ,  Yi LIU ,  Yirong TANG

IPC: H02P21/14 ,  H02P21/00

Abstract: A multistep finite control set model predictive control method for linear induction machines is provided, and the method belongs to a control technology field for linear induction machines. The method specifically includes the following steps: collecting a primary phase current of a linear induction machine in a three-phase coordinate system; solving a multistep reference voltage vector sequence by iteration according to a current value; keeping only two non-zero voltage vectors and one zero voltage vector that are closest to a reference voltage vector in each predictive step; and further eliminating a voltage vector sequence having a large cost function value through dynamic online comparison with a cost function value.