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Multi-phase motor drive system are increasingly used due to their inherent advantages. Several topologies are investigated in the literature for multi-phase drive system. The most popular among them are five-phase and six-phase. In six-phase system two topologies exist. In one topology, the windings or phases are 60 degrees apart and called symmetrical six-phase system. The second topology has two...
The paper describes the theory of voltage space vector PWM in three-level inverter. The necessary and sufficient conditions for waveforms, such as synchronization, three phase symmetry (TPS), half-wave symmetry (HWS) and quarter-wave symmetry (QWS) are presented. Different strategies and realization methods are introduced. Simulation waveforms of voltage, current and corresponding harmonic spectrum...
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