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Nowadays, induction machines can be considered the backbone of various industrial applications due to the many characteristics such as rigidity, simplicity, high reliability, and low maintenance that can be manufactured for a long time. However, poor efficiency and power factor and increased amounts of torque ripple and losses significantly impact the performance and hence its efficiency. Therefore, in order to improve the performance of induction machines, the special design topology for stator and rotor configurations must be investigated and correctly estimated. This paper presents the analysis of the variable geometries of the cage's rotating bars. More specifically, the influence of dimensions and positions, as well as the shapes of the rotor rods, have a significant impact on the dynamic performance (developed torque, starting torque, ripple torque, starting current, power factor, harmonics, output power, and efficiency) are investigated. The Finite Element Method (FEM) is used to create the optimum designs as well as calculations are used to optimize the shapes of rotor slots in order to improve starting performance characteristics such as starting current, initial torque, magnetic flux connection under starting conditions, and efficiency. Furthermore, the characteristic of the manufacturing material of the rotor are examined, and methods to reduce losses for an induction motor to enhance efficiency are examined. This paper focuses on the squirrel cage induction motor (SCIM). [ABSTRACT FROM AUTHOR]

Squirrel cage induction motor (SCIM) plays an important role in industrial applications thanks to its hardness, durability, and ease of design. With all these advantage researches are still being conducted to improve the performance of the induction motor because it suffers from problems such as low power factor as well as ripple torque and low efficiency. the main objective of this paper is to discuss the increasing of the starting torque and decreasing the ripple torque as well as increasing the efficiency of the squirrel cage induction motor based on specific methodologies carried out on the rotor bar by changing its position in the horizontal and vertical direction as well as implementing the skewing effect on rotor bar and analyzing the impact of each of these changes on the performance and efficiency by using finite element method (FEM). [ABSTRACT FROM AUTHOR]