Hello there
I am new to this forum, so if this thread is posted incorrectly please say so.
Currently i am running a project where we are supposted to control a BLDC motor (to run a skateboard).
Anyway. Our bridge and control is running (supposedly) correct, since we can run the motor in open loop.
Now to control the commutation we are looking at our BEMF signal, which unfortunately is looking incorrect.
I do not have any chance to upload the actual oscilloscope pictures, but I can draw it quite decently.
The picture below shows how each of the A, B or C BEMF looks like. This signal is Not very easy to calculate a zero-cross from.
I can get Scope-pictures tomorrow of everything you might want, to be able to help me.
Hopefully you have an idea of what could be wrong.
I am new to this forum, so if this thread is posted incorrectly please say so.
Currently i am running a project where we are supposted to control a BLDC motor (to run a skateboard).
Anyway. Our bridge and control is running (supposedly) correct, since we can run the motor in open loop.
Now to control the commutation we are looking at our BEMF signal, which unfortunately is looking incorrect.
I do not have any chance to upload the actual oscilloscope pictures, but I can draw it quite decently.
The picture below shows how each of the A, B or C BEMF looks like. This signal is Not very easy to calculate a zero-cross from.
I can get Scope-pictures tomorrow of everything you might want, to be able to help me.
Hopefully you have an idea of what could be wrong.