Hello , I am trying to hardware implementation of direct torque control (DTC) of induction motor in dspace 1103. where i am facing problem in estimation of flux?
Instead of using a pure integrator for the estimation of flux a voltage model and current model flux estimation is chosen. This method works fine for the speeds above 200 rpm but for the speed below the 200rpm motor gives jerks in the rotation and the estimation of the flux is not proper. Is it due to i*r drop that the estimation of flux deviates. How can we compensate the i*r drop ?
Kindly suggest me the paper ?
Thanks in advance
Sure, you can find yan answer on this paper
1- http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1353353&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F63%2F29735%2F01353353.pdf%3Farnumber%3D1353353
and
2-http://bulletin.pan.pl/(54-3)237.pdf
If the inventer functions at constant U/f ratio, for low speed and high torque, so high current and high voltage drop, one should boost the voltage .
the pure integrator suffer from Drift and DC component problem, there are many present how to replace the pure integrator by filters. see the attached file
Conference Paper Implementation of Sensorless Direct Torque Control of Induct...
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