I am working in speed sensor-less control of induction motor and for estimation of speed i have used sliding mode observer. Using SMO I have estimated alpha-beta axis stator current and alpha-beta axis rotor flux accurately. though I have estimated currents and rotor fluxes accurately, I can not estimated speed. Is there any one who can help me with this issue?
I have also added the images of results that i have obtained.
See the paper. After estimation ealfa and ebeta, it ca be obtain omega =(1/lamda)*sqrt(ealgfa^2+ebeta^2)
Please see the paper. In this paper, a second order sliding mode observer has been implemented to estimate the rotor flux and the motor speed of a linear induction motor.
Marcel Nicola Hussein Obeid
I have designed the SMO for speed estimation of induction motor but the estimated speed signal have very high transients for very small initial time period of 0.002
how to remove such transients?
i have also attached the images of response of SMO
Please you can see our papers on the SMO-based sensorless control of induction motor.
Do You find any solutions for the problem with the estimation of rotor speed?
sir i have reffered your article but my problem is that the observer estimates the speed properly but only during initial 0.02 seconds it gives huge spikes ranging from 4000 to -4000 can you please help me to solve this problem
Mohamed Trabelsi
Yes sir i can estimate the speed but the only problem is that the observer estimates the speed properly but only during initial 0.02 seconds it gives huge spikes ranging from 4000 to -4000 can you please help me to solve this problem ?
Marcin Morawiec
If You divide by square od rotor flux value please limit this to 0.01 from down.
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