Open AccessNonsingular terminal sliding-mode observer design for interior permanant magnet synchronous motor drive at very low-speed
Author(s) -
Yuan Liu,
Jian Shen,
Fei Xiao,
Mingliang Chen
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.030501
Subject(s) - control theory (sociology) , robustness (evolution) , state observer , observer (physics) , current loop , vector control , rotational speed , computer science , physics , voltage , induction motor , control (management) , quantum mechanics , artificial intelligence , biochemistry , chemistry , nonlinear system , gene
A nonsingular high-order terminal sliding-mode observer of interior permanent magnet synchronous motor (IPMSM) is presented, of which the state variable is the current of rotor-oriented d-q reference frame, to obtain the accurate information about angular speed and rotor position for high-performance vector control system. A nonsingular terminal sliding-mode observer is used to improve dynamic response of the observer speed and robustness of the current observer, and the high-order sliding mode method is adopted to estimate the chattering phenomenon of the conventional sliding-mode. Meanwhile, to obtain the regulator parameters of speed and current loop, an integral-feedback method of estimating the rotor speed is adopted, and the inner current loop is realized using a decoupling and diagonal internal model control algorithm. Experimental results of 2 MW PMSM drive system show that the proposed method can accurately estimate the position and speed of the rotor, and the system has good dynamic and static performances.