Estimated Position Error Suppression Using Quasi-Super-Twisting Observer and Enhanced Quadrature Phase-Locked Loop for PMSM Sensorless Drives

To improve the position estimation performance of the permanent magnet synchronous motor (PMSM) drive system, a novel quasi-super-twisting observer (QSTO) combined with the enhanced quadrature phase-locked loop (Q-PLL) is presented in this brief. Different from the discontinuous signum function used...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2024-08, Vol.71 (8), p.3865-3869
Main Authors: Hou, Qiankang, Ding, Shihong, Dou, Wenhui, Jiang, Leijie
Format: Article
Language:English
Subjects:
Back electromotive force
Electromotive forces
enhanced quadrature phase-locked loop
Harmonic analysis
Harmonics
Harmonics suppression
Observers
Periodic structures
permanent magnet synchronous motor
Permanent magnets
Phase locked loops
Position errors
Position sensing
Quadratures
quasi-super-twisting observer
Rotors
Sensorless control
Synchronous motors
Twisting
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Summary:To improve the position estimation performance of the permanent magnet synchronous motor (PMSM) drive system, a novel quasi-super-twisting observer (QSTO) combined with the enhanced quadrature phase-locked loop (Q-PLL) is presented in this brief. Different from the discontinuous signum function used in conventional sliding mode observer, the proposed QSTO with continuous nonsmooth terms is employed to estimate the back electromotive force (EMF), which significantly reduces the negative impact of the chattering phenomenon. After acquiring the EMF signal from the QSTO, an effective enhanced Q-PLL is utilized to alleviate the low-order harmonic components generated by inverter nonlinearities and flux spatial harmonics. Comparative experimental results demonstrate the satisfactory performance of the proposed sensorless control strategy.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2024.3373024