Paper Info
Title
Improved Rotor Position Estimation in Sensorless Controlled Permanent Magnet Synchronous Machines Having Asymmetric-EMF with Harmonic Compensation
Abstract
This paper investigates the performance of sensorless control of switched-flux permanent magnet synchronous machines (SFPM) with different stator winding topologies, such as all poles wound (double-layer winding) and alternate poles wound (single-layer winding), whose back electromotive force (EMF) exhibit different waveform characteristics, i.e. sinusoidal, asymmetric and non-sinusoidal waves. Most importantly, it is found that the single-layer SFPM machine is with asymmetric back-EMFs, due to which the performance of sensorless control will deteriorate. In order to minimize this influence, a control strategy is developed for the improvement of accuracy of rotor position estimation, which is based on the elimination of back-EMF harmonics and not sensitive to the machine parameters. Besides, it also shows that the developed strategy is easy for implementation and the experimental results confirm that the influence of asymmetric and non-sinusoidal back-EMF can be effectively compensated. Consequently, an improvement in the accuracy of rotor position estimation is achieved at both steady and dynamic states as compared with those conventional methods without compensation.
Year
DOI
Venue
2015
10.1109/TIE.2015.2426671
Industrial Electronics, IEEE Transactions  
Keywords
Field
DocType
asymmetric emf,brushless ac machine,flux-linkage observer,permanent magnet machine,rotor and speed estimation,sensorless control,windings,estimation,harmonic analysis
Control theory,Waveform,Harmonic,Control engineering,Rotor (electric),Harmonics,Harmonic analysis,Electromagnetic coil,Counter-electromotive force,Stator,Engineering
Journal
Volume
Issue
ISSN
PP
99
0278-0046
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Lin, Tzu-Chi100.34
Zhu, Z.Q.2273.79
Liu, J.M.300.34
T. C. Lin411.70