Comprehensive Analysis and Design of a Pulsating Signal Injection-Based Position Observer for Sensorless Synchronous Motor Drives

The work focuses on a new mathematical formulation for the transfer function (TF) of a pulsating injection-based position observer, as the key point for its correct design. The proposed analysis exploits the modulation/demodulation control theory to derive the TF of the whole estimator in the Laplac...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2022-04, Vol.10 (2), p.1925-1934
Main Authors: Ortombina, Ludovico, Pasqualotto, Dario, Tinazzi, Fabio, Zigliotto, Mauro
Format: Article
Language:English
Subjects:
Control theory
Couplings
Demodulation
Design analysis
High-frequency injection
interior permanent magnet (IPM)
Internal model principle
Mathematical analysis
Mathematical model
Observers
position observer
Position sensing
Regulators
Rotors
Saturation
sensorless
Signal injection
Stators
Synchronous motors
synchronous reluctance (SynR)
Synthesis
Transfer functions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The work focuses on a new mathematical formulation for the transfer function (TF) of a pulsating injection-based position observer, as the key point for its correct design. The proposed analysis exploits the modulation/demodulation control theory to derive the TF of the whole estimator in the Laplace domain. Magnetic iron saturation effects and cross saturation between the dq -axes are considered in the observer design. To test the effectiveness of the new TF representation of the observer, it is used to synthesize two different regulators, namely by the direct synthesis and the internal model principle. An extensive experimental stage is included pointing to fully verify the accuracy of the proposed model and the theoretical considerations. A comparison with the existing mathematical model of the observer is also reported to show the improvement achievable in the position estimation by the proposed observer synthesis.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2021.3053467