Comparison of Amorphous Steel, Supercore, and Soft Iron on 8/6 Switched Reluctance Motor Magnetic Field Distribution and Torque Ripple

This paper discusses the torque and magnetic field characteristics of switched reluctance machine when excited with smoothed trapezoidal current at its winding. Switched reluctance motor observed in this paper is a 450 W, 8/6 type switched reluctance machine commonly used in household applications. To observe the torque ripple electric field distribution in the design of this motor, the finite element method is used. The simulation result suggests an average torque of 3.1 Nm per electric cycle and a ripple of 5 Nm. The maximum magnetic field interaction happens the highest at an angle of 2.75° from its starting point. The duty cycle effect is observed to see the correlation between the cycle and developed torque. 22% duty cycle is chosen as the most suitable choice to drive switched reluctance model due to its optimal torque ripple characteristics. Then, it is concluded that this simulation’s characteristic is valid for further study of this machine.