Optimization of slot permeance coefficient with average differential evolution algorithm for maximum torque values by minimizing reactances in induction machines

Abstract

This study focused, the stator and rotor slot permeance coefficient values of an induction motor with a 3-phase squirrel cage are optimized using the Average Differential Evolution (ADE) algorithm and it is aimed to maximize the torque values (starting, maximum, and nominal) of the motor. In this context, the stator and rotor slot parameters of the motor (slot heights, widths, etc.) are optimized to give the minimum stator / rotor inductance and leakage reactance values. Thanks to obtained the new stator and rotor slot geometries, an improvement of 12.07% at the starting torque, an improvement of 5.40% at maximum torque and an increase of 1.13% at nominal torque value were achieved. In addition, total permeance, inductance and leakage reactance values and convergence curves for different slip conditions are given comparatively.

Keywords

• ADE algorithm
• Stator and rotor slot optimization
• Slot permeance coefficient
• Leakage reactance calculation
• Torque analysis