Abstract

In this paper, a multi-phase induction machine drive utilising the brush dc machine operation principle is presented and implemented on a cage rotor multi-phase induction machine. The results from measurements prove that the proposed brush dc control method for multi-phase induction machine drives produces remarkable results in the sub-base and flux weakening speed regions of the drive. It is found that a lower number of number of field phases can be used for better use of the inverter current capability and for better current density distribution. Also, results show that the drive system's efficiency compares well with that of a standard three phase drive system. The method can be used for any high-phase-number cage or wound rotor induction machines.

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