I am asking because I don't know why there is a 30 degree delay of sensorless trapezoidal communication compared to sensored one?
I inferred that is because of it's the backemf, the waveform can't react immediately, but I am not sure.
Please refer to following Youtube link, it's from TI Precision Labs - Motor Drives: Trapezoidal Commutation
As the video, the six segment of sensorless are 30 degree delay than sensored one.
The waveform of sensorless is below, it is located at top left.
The waveform of sensored is below, it is located at bottom left.