Abstract
In induction motors, the leakage reactance values are obtained from the motor short circuit operation experiment. However, these values do not give clear results for different geometries. For this reason, taking into the parameters of the slot geometry accounts for determining the stator and rotor leakage reactance values that are important in terms of obtaining more accurate results. This paper has investigated the stator slot permeance values of nine different stator slot structures commonly used in industrial type of three-phase squirrel cage induction motors for obtaining the best starting torque. The stator inductance and leakage reactance values were calculated for each stator slot structure. The change of starting torque of the induction motor has been analyzed by using the MATLAB code. As a result of the analysis, the stator slot structure, which gives the best starting torque, has been obtained. It has been also shown that a 16% improvement can be achieved by changing the stator slot structure at the starting torque. This increase in the starting torque will provide a great advantage for the motor's acceleration versus a heavy load.
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