I have a project were they remote team is requesting PMAC motors and sinusoidal drive. Theire reason for this over a brushless DC is that there is more power avaialbe because the phases at any given moment, all three phases are connected to Vbus or Gnd. BLDC in Bang-bang mode only appies two phases at a time and watched the third one for BEMF.
The only difference I know of is the torque ripple in BLCD compared to PMAC but in this application that wouldn't matter.
Is there any validity to there being more power being avialable from a PMAC than a BLDC give the same case size and bus voltage?