Optimization of the Electromagnetic Characteristics of a 3-Phase Squirrel-Cage Induction Motor Using FEM (original) (raw)
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Optimal design of induction motor with multi-parameter by FEM method
2015 9th International Conference on Electrical and Electronics Engineering (ELECO), 2015
There are a lot of parameters to improve the efficiency of squirrel cage induction motors. Most of the studies deal with only one parameter at a time. However, Optimization of all parameters are needed to get the most efficient motor. This paper shows that three phase induction motor parameters including rotor slot type, stator slot type, steel sheet and rotor material optimized by using the module Rmxprt in Maxwell. The Results show that 157% increasing torque and 4.1% increasing efficiency are obtained.
Optimum design of a three phase squirrel-cage induction motor based on efficiency maximization
Computers & Electrical Engineering, 1995
Efficiency maximization of a three phase squirrel-cage induction motor with constraints imposed upon the performance characteristics of the motor is carried out. Initially a computer program, based upon the numerical and analytical design procedures, has been developed for the design of a three phase squirrel-cage induction motor and its calculated performance has been validated against the performance of the squirrel-cage motor of standard commercial design. The output of this program is the input of the optimization program. A non-linear optimization routine for the motor design is used and this optimized design is compared with those obtained using other optimization procedures and a more complicated optimization procedure. The pattern search method of Hooke-Jeeves is used successfully, by direct imposition of constraints, for optimum design of a 5 h.p. motor. The results of the optimization consisting of variations of the performance conditions and relative variations of these characteristics, are then compared with the results of the optimization based upon the Han-Powell procedure, simple and modified Hooke-Jeeves methods. This comparison indicates that, in spite of different optimization variables and routines used, the relative variations of the performance characteristics are similar.
Performance Improvement of squirrel cage induction motor- A review .Paper
Hiba Esam , Abdullah K. Shanshal, 2024
Nowadays, induction machines can be considered as 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 have a significant impact on 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. In this paper, the analysis of the variable geometries of the rotating bars of the cage is presented. More specifically, the influence of dimensions and positions as well as shapes of the rotor rods which 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) are 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 characteristics of the manufacturing material of the rotor are examined and methods to reduce losses for an induction motor to enhance efficiency are examined. The focus of this paper is on the squirrel cage induction motor (SCIM).
Optimal Design of Rotor Slot Geometry of Squirrel-Cage Type Induction Motors
2007 IEEE International Electric Machines & Drives Conference, 2007
This paper deals with the optimal design of squirrelcage rotor slots and copper bars of high power induction motors with respect to the values of starting torque, breakdown torque, rated values of efficiency and power factor as well as rotor heating. Three geometries of rotor slots and of bars cross-section, keeping the same cross-section area, are considered: rectangular shape, stepped shape and step-holed shape. This study is based on the finite element analysis of the induction motor where only the rotor slots and bars cross-section configurations change from an application to another. The comparison of simulation results proves that important increase of starting torque and high values of efficiency of copper squirrel-cage type induction motors can be obtained in case of step-holed shape of rotor bars cross-section, without significant decrease of the breakdown torque. Criteria for evaluation of optimal geometry of rotor bars and of optimal value of bars cross-section area are studied.
Electromagnetics, 2004
The aim of this paper is first calculating the airgap magnetic permeance in a mixed eccentricity condition. This is done by studying the governing geometric conditions of the airgap. A novel and precise distribution of the airgap permeance is introduced and compared with those available in the literature. Moreover, by reviewing and extending the winding function theory for a nonuniform airgap, the general equations for evaluating the inductances of a three-phase squirrel-cage induction motor with a mixed eccentricity condition is presented. Various inductances of the motor are then calculated using the airgap permeance distribution and inductance equations, which lead to precise and closed form analytical expressions. In this calculation, skewing of the rotor bars is taken into account. Finally, the performance of a three-phase squirrel-cage induction motor with a mixed eccentricity is simulated and analyzed.
Electromagnetic and Thermal Analysis/Design of an Induction Motor for Electric Vehicles
International Journal of Mechanical Engineering and Robotics Research, 2018
Induction machines are the most commonly used electrical machines in applications, since they are durable, easy to manufacture and control. Additionally, they require less maintenance and response different loads. In this study, the design of 115kW (continuous 85kW) squirrel cage induction motor is presented for electric vehicle applications. Main design constraints and performance criteria of the motor are determined, and the computer-aided design is performed depending on these values. In the design procedure, initially, an analytical design of the electric vehicle motor is performed depending on specified design criteria. Then, the analytical design is verified by using finite element analyses. Depending on the obtained results in electromagnetic analyses, the squirrel cage induction motor for electric vehicle is modified in order to improve the obtained performance further. The electromagnetic and thermal analyses of the designed motor are performed by using Maxwell and ANSYS software programs, respectively. The insulation class of the designed motor is determined by considering the maximum allowable temperature criterion. The analyses results show that the designed motor satisfies design constraints and performance criteria.
Numerical and Analytical Model of Induction Motor for Computer Aided Design
2017
Paper presents analytical and numerical model of three-phase asynchronous squirrel cage motor suitable for fast computation of motor steady state and transient performance characteristics at various operating modes: no-load, rated load and locked rotor. From the motor analytical model, numerical model for computing transient characteristics and magnetic flux density in motor cross-section is deduced. Accuracy of the analytical model is verified by experiment. Influence of various design parameters on motor torque is studied. Derived computer models allow fast changes in motor design and development of various motor variants with improved performance characteristics.
Electromagnetic and Thermal Design/Analysis of an Induction Motor for Electric Vehicles
International Journal of Mechanical Engineering and Robotics Research, 2019
The most commonly used electrical machine is the induction machine since it is durable, easy to manufacture and control. Additionally, it requires less maintenance, and responses different loads. In this study, the design of 115kW (continuous 85kW) squirrel cage induction motor is presented for electric vehicle applications. Main design constraints and performance criteria of the motor are determined and depending on these values, computer aided design is performed. In the design procedure, initially, an analytical design of the electric vehicle motor is performed depending on specified design criteria. Then, the analytical design is verified by using finite element analysis. Depending on the obtained results in electromagnetic analyses, the squirrel cage induction motor is modified in order to improve the obtained performance further. The electromagnetic and thermal analyses of the designed motor are performed by using Maxwell and ANSYS software programs, respectively. Designed motor will stand maximum allowable temperature based on temperature rise of the used insulation class. The analyses results show that the designed motor satisfies the design criteria. Index Terms-Induction motor, electric vehicle, thermal analysis, electromagnetic analysis I.
Maximizing the Efficiency of 3-Phase Induction Motors (Squirrel Cage Motor
Induction motors are used for many industrial purposes. They can act as electrical drives for many processes in many production processes. This paper will focus on how to improve the efficiency of these motors-3 phase squirrel cage induction motor (SCIM) in order to save electrical energy. This is because it has been experimentally observed that the efficiency of the induction motors is poor with low load conditions, hence more energy is wasted. We will be looking at the various losses in the induction motor. Also the paper will sample some methods like the conventional methods and the fuzzy logic approach as used in maximizing/optimizing the efficiency of the induction motors. We shall also sample results from simulations that prove show how the efficiency is maximized by adjusting the input voltage.
3D FEA Based Squirrel Cage Rotor Model for Design Tradeoffs and Performance Analysis
Applied Power Electronics Conference and Exposition (APEC), 2015
An accurate rotor resistance estimation model of squirrel cage induction motors (SCIMs) is developed in 3D FEA. 2D transient analysis was utilized for excitations in the 3D model to improve its accuracy over previous 2D and analytical methods. Rated and starting performance from the FEA model match with the nominal and locked-rotor performance of a 3-phase, 460 V, 1 hp test machine. A modified ring model has been proposed and machine torque-slip characteristics and nominal performance have been analyzed. The effect of slot opening and 4 classes of SCIM bar geometry have been investigated to analyze their relative performance. Finally, four different ring and bar combinations are suggested, with the modified rotor structure presenting gain in starting and rated performance compared to the test machine. Results present the design tradeoffs and performance analysis, first for a 1 hp SCIM and then extended for a higher power (10 hp) machine.