Optimum design of a three phase squirrel-cage induction motor based on efficiency maximization (original) (raw)
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Optimal design of three phase induction motors and their comparison with a typical industrial motor
Computers & Electrical Engineering, 2001
Three optimally designed three-phase squirrel-cage induction motors are compared with an industrial (conventional) motor having the same ratings. The Hooke±Jeeves search routine is used for optimization and three objective functions, namely eciency, eciency±cost and cost, are considered. Comparison of the optimum designs with the initial and industrial design reveals that better than the proposed performance can be obtained by a simple optimization method. It is interesting to note that the industrial design satis®es some performance of the cost optimum design, and eciency optimum design, of course with a lower eciency. The most desirable variation of motor performance with line voltage and output power is due to the eciency optimum design.
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.
European Transactions on Electrical Power, 2007
Two optimization techniques, the simplex and Hooke-Jeeves methods, are employed for optimum design of a 3.75 kW three-phase induction motor. Three different objective functions, eflciency, cost and cost-eficiency are used f o r this study. The obtained results are mainly compared in respect with their objective functions, but other design details have been also pointed out. Effects of stator-and rotor slot numbers and shape and the size of step in the search routine upon the optimum design are examined and discussed.
Efficiency and Cost Optimized Design of an Induction Motor Using Genetic Algorithm
IEEE Transactions on Industrial Electronics, 2017
In the context of electricity shortage and an attempt to save the environment, introduction of energy efficient motors in different fields of application have become a necessity. This paves the way for fusing the conventional machine design procedures with optimization techniques. Unfortunately, the mathematics of electrical machine design involves calculations with highly non-linear equation sets, and hence the conventional analytical optimization techniques do not fit well. In this study, design of an efficiency-optimized squirrel cage induction motor is considered, where Genetic Algorithm is chosen as the tool for optimization. The various constraints considered are selected on the basis of material, mechanical and performance considerations as approved by standards and practices. The influence of change of materials and change of upper limit of customer's budget on different key motor design performance indicators are studied with and without cost constraints. Also, a systematic and statistics-based approach is proposed to achieve an optimized motor design, even at very low cost, provided relaxation of some constraints are allowed by the specific application. The optimized results are validated through tests on laboratory prototypes.
Design of a Three Phase Squirrel Cage Induction Motor for Electric Propulsion System
IFAC Proceedings Volumes, 2014
This paper presents the design of three-phase induction motor (IM) for high speed with torque speed curve suitable for vehicle propulsion applications. First, analysis of induction motor with the classical approach to machine design is presented and this method is verified by a commentary on contemporary design using RMxprt and design optimization techniques. This paper will describe how RMxprt analysis can be utilized to design and model the performance of rotary electrical machines. Maxwell2D Design software is used as finite element analysis tool to design and model the performance of 5 hp, 4-pole, 2400 rpm induction motor.
The induction motor due to its characteristics forms the most common choice of industrial applications worldwide. In this work, with the use of FEM analysis, a specific induction motor is optimized under three different criteria. The geometric features of the rotor compose the designing variables of the optimization process. Three models have been created and studied. These resulting models present optimized electromagnetic characteristics depending on the designer’s restrictions and also on the application requirements. The finite element analysis carried out is AC steady-state and takes into consideration the non-linear characteristic of the stator and rotor iron core.
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).
The attribute of an induction motor vary with the number of parameters and the performance relationship between the parameters also is implicit. In this paper a multiobjective problem is considered in which three phase squirrel cage induction motor (SCIM) has been designed in such a way that the efficiency is maximized while power density to be minimized simultaneously keeping various constraints in mind. Three well-known single objective methods such as tabu search (TS), simulated annealing (SA) and Genetic algorithm (GA) for comparing Pareto solutions has also been applied. Performance comparison carried out in this paper by performing different numerical experiments. The result shows that NSGA-II outperforms other three for the considered test cases.
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.
Improving squirrel cage induction motor efficiency: Technical review
International Journal of the Physical Sciences, 2012
interest not only among the researchers but also the industry, manufacturer and government. However, until today there are still struggles to find the most holistic environment of the SCIM which achieve its efficiency at the most lowest cost and at the same time sustaining the performance of the motor. This paper will focus on the method on improving SCIM efficiency. The first discussion presented the main importance of efficient motors and its drive systems. These are partly conceptual, partly concerning circuit topology and current commutation technique. The second discussion ooptimization of SCIM efficiency using intelligent techniques which are of particular interest. The third discussion describes the energy efficiency of SCIM standards and most effect motor parameters on SCIM efficiency.