Comparison of Torque between Different Diameters of Copper Rotor Bar Slot by Using FEM Software

This paper presents the comparison of different rotor slot diameter which is designed by using FEM software. The parameter is than taken from 0.5HP AC induction motor with a 10 rotor slot by means of hardware experiment. The Parameter is used as the input for FEM for simulation purposes. The 0.5HP three phase induction motor is investigated by the differences of starting torque. This is because the design with smaller rotor slot can produce high starting torque and this is essential for high-inertia loads such as flywheel-equipped punch press, elevators and hoist as required by NEMA design D. Simulation analysis shows that the 4mm diameter of rotor slots have higher starting torque than the rest of the rotor slots which is 3.4Nm.