Multiphase drives have been proposed in high power safety-critical applications because of their fault-tolerant advantage without needing any extra hardware. Traditional fault-tolerant control methods mainly are mainly focused on the optimized current control with asymmetrical machine model. To realize precise current control and flux observation, a virtual winding method is firstly proposed to re-build the symmetrical model when one or several phases are absent in fault mode. The machine in fault can be dealt as a normally symmetrical machine with some virtual winding instead of the fault winding. Then the proposed method is verified by simulation model of multiphase machine. Finally, a five-phase induction machine experiment platform is built and experimental results demonstrate that the proposed control algorithm can significantly reduce the torque ripple under an open-phase condition and achieve the smooth transition from pre- to post-fault situations.
Fault-tolerant control of multiphase induction machine drives based on virtual winding method
2017-06-01
2057490 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch