Open AccessRotor position estimation scheme with harmonic ripple attenuation for sensorless controlled permanent magnet synchronous motors
Author(s) -
Lu Qing,
Zhu Xiaoyong,
Quan Li,
Zuo Yuefei,
Du Sichen
Publication year - 2018
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2017.0858
Subject(s) - control theory (sociology) , counter electromotive force , rotor (electric) , observer (physics) , harmonics , magnet , harmonic , synchronous motor , torque ripple , ripple , computer science , harmonic analysis , engineering , physics , direct torque control , voltage , induction motor , electronic engineering , acoustics , control (management) , mechanical engineering , quantum mechanics , artificial intelligence , electrical engineering
To achieve high‐performance sensorless control of permanent magnet motors with non‐sinusoidal back electromotive force (EMF), an improved sliding mode observer (SMO) adopting synchronous rotating low‐pass filter (SRLPF) is proposed. The SRLPF is utilised to reduce the back‐EMF harmonics and extract the fundamental component. Different from the traditional rotor position observer, the proposed observer can calculate the rotor position with the back‐EMF fundamental component. Owing to the decrease in the influence of non‐sinusoidal back‐EMF, the estimated rotor position harmonic ripple error can be greatly reduced. Then, the high estimated accuracy and excellent sensorless control performance can be obtained. In addition, the proposed strategy is easy for implementation. With the comparison between the traditional SMO and the proposed observer, the experiments of the system steady‐state error, the speed tracking performance, and the disturbance rejection ability in the speed range from 60 r/min to the rated speed 750 r/min are presented. The validity of the proposed method is conformed.