| Abstrakt: |
Multiphase induction machine drives are suitable in the application of electric vehicle due to their advantages over conventional three phase drives: high power under low voltage, less torque pulsation, higher efficiency fault tolerance operation, etc. Strategies for fault-tolerant control of a 5-phase motor were analyzed, based on the principle of maintaining the same magnetic motive force (MMF) after the fault occurrence. And the interaction between 1st and 3rd MMF under fault-tolerance operation was investigated. Proportional resonant regulator was adopted to resolve the passive impact of torque ripple and low efficiency caused by hysteresis control, which can achieve zero steady-state error even in the stationary phase frame, because of its large gain at the target electrical frequency. A five-phase induction motor drive system with low DC link was constructed, and experimental results verify the analysis of the fault tolerance control strategies under open phases. [ABSTRACT FROM AUTHOR] |
