PMSG control

As I say background, it is actually a learning background of myself, not necessarily that of the PMSG.

A very brief introcuction For an ideal PMSG: The magnets in the rotor generate a constant magnetic field, $\psi_{m}$ (When the rotor is still). The three-phase AC current in the stator windings generates a rotating magnetic field (RMF), with speed of $60f$ RPM (revolutions per minute). $f$ is the frequency of the three-phase supply, and 60 is from seconds in a minute. (My rough explanation: the stator winding with 3-ph AC current is like a set of magnets revolving outside the rotor, the rotor magnets, therefore, would also revolve, with its north pole locked to the south poles of the equivalent stator magnets....