Hi. I am having some difficulty getting my head around direct torque control. What I have understood is that stator voltage and rotor current is measured. Stator voltage gives an estimate of the flux linkage. Then the rotor current combined with the use of flux linkage vector gives a measurement of torque. The flux and torque are then compared with the reference values and PWM waveform changed accordingly.
My questions are
1. How does the flux linkage get estimated from stator voltage?
2. Why does flux need to be compared with a reference value? ( I thought torque is the main thing we are looking at and if it deviates then we can alter the flux which in turn alters the torque)
Any guidance would be great
My questions are
1. How does the flux linkage get estimated from stator voltage?
2. Why does flux need to be compared with a reference value? ( I thought torque is the main thing we are looking at and if it deviates then we can alter the flux which in turn alters the torque)
Any guidance would be great