Finite Element Analysis of Multi-Phase Squirrel Cage Induction Motor to Develop the Optimum Torque

摘要

Based on 2D finite element analysis (FEA), This paper presents an optimization strategy to get maximum induced torque of squirrel cage three phase induction motor of a constant outer stator diameter. The optimization study includes two main steps. The first step is to obtain the optimum air gap flux density while the second step is to obtain the optimum split ratio(inner to outer stator diameter) of the motor. The stator design of the three phase motor is modified and optimized to operate as a six phase asymmetrical induction motor and average values of full load torque of both motors are compared. For three phase motor, effect of changing design parameters such rotor bars, poles and stack length on the optimum design values is investigated. A real class A three phase squirrel cage four pole induction motor is considered to apply the optimization study. The motor is designed using ANSYS MAXWELL 2D software. All numerical results are analyzed using MATLAB software.