Some answers, with a bit of delay. First of all this example is not anymore in the product in the form it was. The model was in R2017b but updated overtime. Apart from that:
- For Park transform we need the measurements of two phases if the system is balanced (ia+ib+ic=0). The speed might not be needed but the position is needed for the Park transform.
- Not sure which part of the model are you reffering.
- Park transform has AC inputs but the output is DC. Check this page for more insights: https://mathworks.com/help/sps/ref/parktransform.html
- Not sure which part of the model are you reffering, I don't see it in 17b.
- dq voltages mjust satisfy the quadratinc voltage constraint. that is actually done there computing the magnitude and giving old voltages or unsaturated new command if feasible.
- That is a scalling of the modulation waveform.
- If the d axis current is 0 then the q axis current is the magnitude of the phase currents.
- The Q format does not require a floating point unit but could be done on such a processor. Not sure I understand the question correctly.