An Adaptive Observer With Online Rotor and Stator Resistance Estimation for Induction Motors With One Phase Current Sensor

An adaptive observer with online estimation of rotor and stator resistances is considered for induction motors, while only one phase current is measured. Generally, an induction motor drive controller needs at least two phase-current sensors. Nevertheless, failure of one current sensor results in de...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on energy conversion 2011-09, Vol.26 (3), p.959-966
Main Authors: Salmasi, F. R., Najafabadi, T. A.
Format: Article
Language:English
Subjects:
Adaptive observer
Argon
Estimation error
fault tolerant
induction motor
Motors
Observers
parameter estimation
Resistance
rotor resistance
Rotors
sensorless control
stator resistance
Stators
Studies
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:An adaptive observer with online estimation of rotor and stator resistances is considered for induction motors, while only one phase current is measured. Generally, an induction motor drive controller needs at least two phase-current sensors. Nevertheless, failure of one current sensor results in degradation of motor drive performance and reliability, and also state and parameter estimation errors. Furthermore, any controller or observer in induction motor drives should be robust to rotor and stator resistance variations. The proposed observer is capable of concurrent estimation of stator currents and rotor fluxes with online tuning of rotor and stator resistances, while rotor speed and only one phase current are available. Stability and convergence of the observer are analytically verified based on the partial stability theory. The observer equations and adaptation laws can be easily implemented, which makes it attractive for industrial development of fault tolerant drives. A complex programmable logic device is implemented for the experimental setup that controls an intelligent power module including insulated gate bipolar transistors. Extensive simulation and experimental tests verify the asymptotic convergence of the proposed observer.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2011.2159007