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Speed-sensorless induction motor drive

version (321 KB) by Bartlomiej Ufnalski
A neuroestimator is used to enable speed-sensorless operation of the asynchronous motor drive.


Updated 04 Dec 2015

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This model demonstrates possibility to use a feedforward neural network (static neural network) to estimate (more precisely to approximate) mechanical speed of the induction motor. The main challenge in such a task is to construct an effective approximation base. Here the 6 heuristic signals described in are used. It should be noted that any estimation method that exploits only fundamental excitation (fundamental model) fails at zero stator flux frequency. The induction motor becomes an unobservable system at zero stator frequency. The proposed solution also has this limitation. If control at zero frequency is required, other techniques have to be implemented. For more hints see e.g. . For some details on the analytical controller tuning in this particular drive, please see .

Cite As

Bartlomiej Ufnalski (2020). Speed-sensorless induction motor drive (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (5)

Sam lee

Xiaohua Wang

Bartlomiej Ufnalski

Dear Gao Xiang,
They are, respectively, the modulus of the stator current and voltage space vectors, the real and imaginary instantaneous powers (please see Akagi et al.), and the real and imaginary part of the instantaneous impedance. More info can be found in our papers. Good luck with your experiments!

gao xiang

gao xiang

GOOD .but who can tell me the' 6 heuristic signs 'means? please tell email

MATLAB Release Compatibility
Created with R2013a
Compatible with any release
Platform Compatibility
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