Performance analysis of three phase induction motor using different magnetic slot wedges

This paper presents the performance of three phase induction motor when magnetic wedges of different permeability are inserted in stator slots. Open slots produces variable reluctance path to the air gap flux and it reduces the output power of the machine and hence efficiency. Performance of motor without wedge and with different magnetic slot wedges i.e. cast iron, Magnoval® having different relative permeability are investigated using FEA-analysis, and the results shows that higher relative permeability materials reduces the output performance of the motor. This also validate the use of magnetic wedges of low permeability is reasonable with improved performance.