PI and fuzzy estimators for tuning the stator resistance in direct torque control of induction machines

Direct torque control (DTC) of induction machines uses the stator resistance of the machine for estimation of the stator flux. Variations of stator resistance due to changes in temperature or frequency make the operation of DTC difficult at low speeds. A method for the estimation of changes in stato...

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Bibliographic Details
Published in:IEEE transactions on power electronics 1998-03, Vol.13 (2), p.279-287
Main Authors: Mir, S., Elbuluk, M.E., Zinger, D.S.
Format: Article
Language:English
Subjects:
Applied sciences
Electric resistance
Electrical engineering. Electrical power engineering
Electrical machines
Electronics
Exact sciences and technology
Frequency
Fuzzy control
Induction machines
Machinery
Pi control
Regulation and control
Simulation
Sliding mode control
Stators
Temperature
Torque control
Voltage
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Summary:Direct torque control (DTC) of induction machines uses the stator resistance of the machine for estimation of the stator flux. Variations of stator resistance due to changes in temperature or frequency make the operation of DTC difficult at low speeds. A method for the estimation of changes in stator resistance during the operation of the machine is presented. The estimation method is implemented using proportional-integral (PI) control and fuzzy logic control schemes. The estimators observe the machine stator current vector to detect the changes in stator resistance. The performance of the two methods are compared using simulation and experimental results. Results obtained have shown improvement in DTC at low speeds.
ISSN:0885-8993
1941-0107
DOI:10.1109/63.662841