Abstract
This paper investigates the possibilities of controlling five-phase induction machine with three-phase inverter via three-to-five phase transformer. For this purpose, two models of the system formed by the transformer and the machine are proposed, based on the conventional concept of per-phase modeling. The first model represents the system as a three-phase induction machine, the second model represents it as a five-phase induction machine. The dynamic behavior of the system is deduced from the per-phase models, therefore, the dynamic of the system is described either by an equivalent three-phase machine dynamic model or by that of an equivalent five-phase machine. Two indirect oriented flux control schemes corresponding to the dynamic models are proposed. The study is conducted by simulation and experimental tests for the proposed models, and only by simulation for the proposed control schemes. The possibility of controlling the machine via the transformer using conventional variable frequency drive, is tested.
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