Modulation Restraint Analysis of Space Vector PWM for Dual Three-Phase Machines Under Vector Space Decomposition

For dual three-phase machines, vector space decomposition allows the control of fundamental and main harmonic components in αβ xy subspaces, respectively. However, modulation voltage references two subspaces using pulsewidth (SVPWM) is not independent but coupled. In that, cannot be modulated simultaneously beyond restraints, thereby distorting regulation causing harmonics or even system misbehavior. Meanwhile, subspace responsible for electromagnetic torque generation should prioritized secured. Thus, this article proposes a systematic analysis restraints three representative SVPWM techniques, i.e., linear range under an assured index voltage. Voltage within can successfully without affecting margin left then acknowledged. This used to limit output current controllers exceed restraint, avoiding failure. Finally, experimental results validate demonstrate behaviors out range.