Recent Research Trend on Multi-phase Induction Machines

This paper presents a detailed recent research trend on multi-phase induction machines, which include multiphase induction motor as well as the multiphase induction generator. Electrical power system developed so far was of three phases since the beginning of the last century but research in the field of multi-phase machines have attracted increased interest in recent years due to the several advantages that they offer as compared to the conventional three-phase ones, such as high power handling capability by dividing the required power between multiple phases, reduced torque pulsations and higher reliability. In particular, unlike in a three phase drive, the loss of stator phase does not prevent the machine from starting and running. Increased torque per ampere for the same volume machine due to reduced stator copper losses and reduced rotor harmonic currents have paved its wider acceptability of utilization.