Patent ID: 8283881

Claim:
A method for synchronously regulating current in a vector controlled motor drive system that includes a five-phase AC machine having five phases and a five-phase inverter module that generates five-phase stationary reference frame stator currents for the five-phase AC machine, the method comprising: performing a five phase-to-αβ phase transformation, based on particular phases indicated in a fault signal as being faulting phases, which transforms particular ones of the five-phase stationary reference frame stator currents that correspond to non-faulting phases to αβ-phase stationary reference frame stator currents, and wherein particular ones of the five-phase stationary reference frame stator currents that correspond to faulting phases that are experiencing fault condition(s) are excluded from the five phase-to-αβ phase transformation; generating synchronous reference frame feedback current signals, based on the αβ-phase stationary reference frame feedback stator currents, and a rotor angular position; and generating synchronous reference frame voltage command signals, based on the synchronous reference frame feedback current signals, and synchronous reference frame current commands.