MATLAB SIMULINK: Three Phase Induction Motor (Squirrel Cage Induction Motor) Experiment (Electrical Machines Lab) (original) (raw)
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IRE, 2021
Induction Motors are the most widely used electric motor, due to its reliability, robust nature and low cost. They are mostly used in household and in the industries. Their industrial application is due to their high torque to volume ratio, ruggedness and low maintenance characteristic which they possess. Induction motor draws a high starting current during starting period which effect on electromagnetic torque, speed and current are greater. The traditional methods of starting includes, Direct On-line (DOL), Star Delta (SD) and Autotransformer (AT) starting, which control these parameters up to certain limits. This research work is about comparing the starting methods of three phase squirrel cage induction motor using Direct On-Line, Star Delta and Auto-Transformer starter. Squirrel cage induction motor has a peculiar problem which is a problem associated with its initial inrush of current. The method used in this study was “Experimental Method” were experiment was conducted in the laboratory on the various starting methods which was earlier mentioned and Direct OnLine (DOL), Star Delta (SD) and Auto-Transformer (AT)starters was used as the material and MATLAB Simulink was used to observed their output behaviour. Results was obtained and presented on tables and on bar-charts were various parameters on the respective machine was compared and the values of “voltage, current, speed and torque were observed and presented on bar-chart. Finally, the study carried out shows that induction motors has a high initial starting current, and over coming this problem, a starting controller has been introduced in phase with the stator of the motor at the point of start to reduce that initial inrush of current.
Different mathematical models have been used over the years to examine different problems associated with induction motors. These range from the simple equivalent circuit models to more complex d,q models and abc models which allow the inclusion of various forms of impedance and/or voltage unbalance. This paper presents speed torque characteristics of induction motor which are calculated on the basis of a mathematical model. This technique is in compliance with the IEEE standard test procedure for polyphase induction motors and generators. Induction machines are the major electromechanical conversion devices in industry. There is a mathematical model of induction motor which is designed from the parameters taken from Machine lab. Through this model we can calculate major features of induction motor very easily. This model solves the issue of torque calculation in three phase squirrel cage induction motor of Machine lab. These results checked on a simulink Model for induction motor fed by PWM inverter. The dynamic simulation is done which is an important tool in the validation of the design process of the motor drive systems and also removes resulting error in the prototype construction and testing. The results obtained by Simulink designed model were encouraging when compared to the design made by practical experience.
2010
The history of induction motor started when Hans Christian Oersted discovered the magnetic effects of electric current in 1820. Induction motors are perhaps the most widely used electric motors in industry. They offer reasonable performance, a manageable torque-speed curve, stable operation under load and satisfactory efficiency.The aim of the paper is to investigate the performance characteristic of squirrelcage induction motor.Simulation and experimental results are presented and compared to validate the mathematical model of motor. The purpose of this study has been to devise a mathematical model, which can reliably predict the steady state performance
Transient behaviour of optimum-designed three-phase squirrel-cage induction motors
European Transactions on Electrical Power, 2007
This paper describes the transient behaviour of optimum-designed three-phase squirrel-cage induction motors. These motors have been designed based upon three different objective functions. They are cost, eficiency and combination of eficiency-cost functions. Transient performance of these optimum designs and an industriai motor are compared and a suitable design for a particular fault is then introduced. A symmetrical voltage disturbance, startup and a symmetrical three-phase short circuit are three cases considered in this investigation.
Lecture 1 Review of Three-phase Induction Motor
The three-phase induction motors are the most commonly used type of motor in industrial applications. In particular, the squirrel-cage design is the most widely used. Construction: The main body of the Induction Motor comprises of two major parts: A. Stator: Stator is made up of number of stampings in which different slots are cut to receive 3 phase winding circuit which is connected to 3 phase AC supply. The three-phase windings are arranged in such a manner in the slots that they produce a rotating magnetic field after AC supply is given to them. The windings are wound for a definite number of poles depending upon the speed requirement. B. Rotor: Rotor consists of cylindrical laminated core with parallel slots that carry conductor bars.
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.
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).
EFFICIENCY OPTIMIZATION OF THREE PHASE SQUIRREL CAGE INDUCTION MOTOR USING SIMULINK MODELS
ijetrm journal , 2020
Induction Motor (IM) control is a difficult and complex engineering problem due to multivariable, highly nonlinear, time-varying dynamics and unavailability of measurements. In this paper vector control for speed control of three-phase Squirrel Cage Induction Motor has been developed and analyzed. The present approach avoids use of flux and speed sensors which decreases the mechanical cost and robustness. Vector control has replaced traditional control method such as using the ratio of voltage and frequency as a constant, which improve greatly dynamic control efficiency of motor.