An Encoderless Predictive Torque Control for an Induction Machine With a Revised Prediction Model and EFOSMO

The finite control state predictive torque control (FCS-PTC) method is known to produce a fast response. However, when compared with the direct torque control (DTC) method, which is inherently encoderless, the FCS-PTC method has a disadvantage because of its speed dependence. An encoderless FCS-PTC...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2014-12, Vol.61 (12), p.6635-6644
Main Authors: Fengxiang Wang, Zhenbin Zhang, Alireza Davari, S., Fotouhi, Reza, Arab Khaburi, Davood, Rodriguez, Jose, Kennel, Ralph
Format: Article
Language:English
Subjects:
Algorithms
Disturbances
Fasteners
Induction machines
Induction motors
Machine tools
Mathematical analysis
Mathematical model
Mathematical models
Observers
Predictive control
Rotor speed
Torque
Torque control
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Summary:The finite control state predictive torque control (FCS-PTC) method is known to produce a fast response. However, when compared with the direct torque control (DTC) method, which is inherently encoderless, the FCS-PTC method has a disadvantage because of its speed dependence. An encoderless FCS-PTC method that is based on a revised prediction model for an induction machine is proposed and experimentally verified in this paper. To observe the unmeasured variables, an encoderless full-order sliding-mode observer (EFOSMO) is applied. Neither the revised prediction model nor the EFOSMO uses the estimated rotor speed value. The disturbance injected by process of speed estimation in the usual encoderless predictive methods is removed from the system. The experimental results show that the proposed algorithm can work well and achieve good performance at a very wide range of speeds.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2014.2317140