flux based sliding mode (SM) observer. Similar to FOC, the proposed PFOC compares stator
current in orthogonal frame with their reference values. The main contribution of PFOC is
that it has the merits of unconstrained bandwidth of inner loop and bypassing the modulation
stage, to guarantee fast dynamic response. More specifically, the tracking error terms of
orthogonal control objectives are optimized in a sequential order, to provide a solution for …