Hello everyone !
I am Mohamed and I am doing my Automation Engineering. First of all thank you for the post. Currently I am doing a project on CONTROL OF BLDC MOTOR IN SIMULINK .
Now I am able to design the commutation table for the working of three phase H Bridge Inverter based on the signal of hall sensor.
I have a few queries on designing current controller. Usually we need to calculate the error signal which will be fed into the current controller. I need to know how this error signal is calculated because we get the reference signal from the output of speed controller but what about the feedback signal for calculating the error signal since there are 3 phases we will have 3 feedback right? In other words from where the feedback signal is taken to calculate the error for current controller?... From here I have 2 questions
1) Is the voltage which is fed for the 3 phase bridge inverter constant? If not then how should it be supplied from the current controller since the bridge inverter have only one source. But as I asked you earlier we have 3phases so three errors are calculated and how it will be given to the inverter.
2) If it is a constant supply voltage to inverter then what is the purpose of the current controller and how does it work... I mean what will be the output of the current controller? And also if its a constant supply then how there will be change in speed....
If my understanding is wrong about the controller please bare with me and try to clear my doubt... Thank you...
