An extended observer-based robust nonlinear speed sensorless controller for a PMSM

This work focuses on the problem of observer-based robust speed sensorless control of a 3-phase permanent magnet synchronous motor (PMSM). Nonlinear design techniques are employed for designing robust speed controller and observer that are able to withstand the effects of modelling uncertainties and...

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Bibliographic Details
Published in:International journal of control 2019-09, Vol.92 (9), p.2123-2135
Main Authors: Rizvi, Syed Ali Asad, Memon, Attaullah Y.
Format: Article
Language:English
Subjects:
Boundary layers
cascaded observer
Computer simulation
Control systems design
Controllers
extended high-gain observer
integral sliding mode control
Modelling
Nonlinear control
Permanent magnets
PMSM
Robust control
sensorless
Sliding mode control
sliding mode observer
Speed control
Synchronous motors
Uncertainty
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Summary:This work focuses on the problem of observer-based robust speed sensorless control of a 3-phase permanent magnet synchronous motor (PMSM). Nonlinear design techniques are employed for designing robust speed controller and observer that are able to withstand the effects of modelling uncertainties and load variations. A new cascaded observer scheme is proposed comprising a continuous sliding mode observer (SMO) and an extended high-gain observer (EHGO). The proposed cascaded observer reduces chattering, exhibits reasonable insensitivity to modelling inaccuracies and is capable of withstanding errors due to the finite boundary layer of continuous SMO. For the robust speed control, an integral sliding mode controller is designed that yields fast and accurate speed tracking performance even in the presence of bounded uncertainties and external disturbances. The complete scheme has been evaluated using simulations and experiments.
ISSN:0020-7179
1366-5820
DOI:10.1080/00207179.2018.1428768