This is a simple current controller. The desired RMS values of d
and q component of the quasi-static space phasor current in rotor
fixed coordinate system are the inputs id_rms and
iq_rms. Using the given rotor position input
phi, the quasi-static m-phase output
currents i[m] are calculated. The model output can be
used to feed a quasi-static current source with phase input to
supply synchronous machines.