Traditional design of cage rotor induction motors publish. The rotor of an induction motor can be a squirrel cage rotor or wound type rotor. Pdf abstrct induction motors are widely used to control the speed of pumps. Selection of induction motors for industrial applications.
Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields. This tutorial will introduce the user to the fundamental electrical and mechanical principles of ac electric induction motor design and application. The main purpose of designing an induction motor is to obtain the complete physical dimensions of all the parts of the machine as mentioned below to satisfy the customer specifications. As a voltage and a current is applied to the stator winding terminals, a magnetic field is developed in the windings. The lims 3phase coil assembly can be directly connected to the ac line for single speed applications or to an adjustable frequency drive for variable speed control.
A linear induction motor lim is a specific type of alternating current ac motor designed to produce motion in a straight line. The stator consists of a series of wire windings of very low resistance permanently attached to the motor frame. Pdf design of induction motors kibrom gebremedhin academia. There are two types of induction motors, one with wound type rotor, also called slipring motor and another one with squirrelcage rotor. As a result, a majority of the ac machines in service, particularly small to mediumsized motors, belong to the other general category the induction machine. Threephase induction motor showing stator, rotor, and.
An induction motor can therefore be made without electrical connections to the rotor. A 480v, 60 hz, 6pole, threephase, deltaconnected induction motor has the following parameters. Sa l 2w 2 w d d 2w w p 2 b 2 a 2 r r 2 a r rw rw, 3 the punching cost c p is estimated as 20% of. The induction motor is made up of the stator, or stationary windings, and the rotor. Sizes vary from fractional horsepower to several thousand horsepower used for such appli.
Design of a three phase squirrel cage induction motor for electric. Design of stator stator of an induction motor consists of stator core and stator slots. Three phase induction motor model design in ansys rmxprt. Key wordsdesign optimization, induction motor, genetic algorithm. The various possibilities in the design modification, speed control, efficiency, power factor improvement of induction motor and double winding induction motors. It gives the relationship between electrical rating and physical dimensions quantities output of a 3 phase im is. The basic idea of an electric motor is to generate two magnetic fields. Control of motorcharacteristics by squirrelcage rotordesign. By definition, an induction motor converts electrical energy to useful mechanical energy. The rotor will constantly be turning to align its magnetic field with the stator field. Induction motors are the commonest type of motor and account for a very large proportion of heavy duty motors. A successful salesman for general electrics motor division once remarked to one of your instructors that, when asked by a customer how a motor. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. Air gap length is a major part of induction motor design.
But the rotor construction differs with respect to the type of motor. The larger the motor power, the more severe this phenomenon. The traditional approach of modelling the induction motor using the finite element analysis fea is through the equivalent circuit model. Pdf induction motor design process and the effect of output. Slip ring induction motor is made up from wound rotor and squirrel cage induction motor is made up from the squirrel cage rotor. This video content about the information of 24 slot, 4 pole, 1500 rpm, 3 phase induction motor winding design.
The linear induction motor is designed for high speed operation. The motor uses a squirrel cage rotor, which has a laminated iron core with slots. The software is made user friendly as it provides a checklist, an easy design data supply and online design tips in each module. Design and analysis of three phase induction motor using computer program. In this series of videos we are going to see how the construction of the induction motor in ansys rmxprt and 2d 3d design part 2 of 3. Analysis and design of ac induction motors with squirrel cage rotors. Introduction cage rotor induction motor im is widely accepted as the most potential candidate for. Control of motorcharacteristics by squirrelcage rotordesign the reactance x2 in an induction motor equivalent circuit represents the referred form of the rotors leakage reactance. Pdf design of a three phase induction motor based on efficiency. These components complicate the motor construction, add cost to the motor design, and require considerable maintenance. An induction motor or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. The singlephase motor stator has a laminated iron core with two windings arranged perpendicularly. Design of 3 phase induction motor free download as pdf file. By far the most commonly used ac motor is the induction motor.
In this work a conventional three phase squirrelcage type induction motor with specifications 10 hp, 415v, stardelta connected and 4 poles is chosen for comparison with our motor, which is designed for good efficiency. A primary consideration for induction motor designer is the. Harley and yao duan georgia institute of technology november, 2009. This singlephase motors are truly two phase machines. Single phase induction motor the singlephase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth.
An induction motors rotor can be either wound type or squirrelcage type. Nema a, b, c and d electrical motor design nema has established four different designs a, b, c and d for electrical induction motors. Design and stress analysis of a high speed rotor for an. This final thesis will mostly be dedicated to induction motors but also to synchronous permanent magnet and reluctance motors. The stator separate from rotor by small air gap have ranges from 0. The induction machine has two electrically active elements. With rated electrical input the motor will deliver rated output shaft power. This mechanical energy may be used for the pumping of liquid from one place to other by using pumps or even to blow air by blowers or ceiling fans. Design methodology the design process of induction motor is an iterative process. Pdf design and analysis of three phase induction motor. Maxwell2d design software is used as finite element analysis tool to design and model the performance of 5 hp, 4pole, 2400 rpm induction motor. Pdf 3phase induction motors are widely used in industrial applications such as pumps, blowers, compressors, conveyors, etc. There are various methods suggested to improve efficiency and power factor of. The manual design of induction motor is the combination of lengthy calculations and special attention.
Introduction this application note describes the design of a 3phase ac induction motor drive with volts per hertz control in closedloop vhz cl. It is based on freescales 56f800e microcontrollers. Design and analysis of three phase induction motor design specifications can be provided to generate the shown in table 1. The construction of stator of the induction motor is almost the same as other motors. Design and development of three phase induction motor using. Design and stress analysis of a high speed rotor for an advanced induction motor matthew t. There are established standard indicators of how effective the motor does its job, as well as data on the nameplate concerning safety and reliability. It is logical that the least expensive, lowest maintenance type. Hence, an utmost care should be exercised in selection of most appropriate type of motor considering number of technical factors for each application, so that the motor would provide desired and. Induction motor, locked rotor torque, power factor, efficiency, genetic algorithm 1.
The machine designer first assumes the efficiency and power factor at the rated condition. In an induction motor, the electric current in the rotor needed to produce torque is obtained via electromagnetic induction from the rotating magnetic field of the stator winding. An induction motor also known as an asynchronous motor is a commonly used ac electric motor. How an induction motor works by equations and physics introduction. Using the same specifications as in the interface gui of the cad method. A lim operates under the same principles as its ac rotary motor counterpart, typically powered by a threephase voltage scheme with a. Schematic representation of yconnected stator winding. In the design of the induction motor, operational characteristics can be determined through a series of calculations. Traditional design of cage rotor induction motors ronald g. Could you please send me the reference document or book which you have used to design motor model. Designing of three phase squirrel cage induction motor for. Be careful it can hurt to tangle with a threephase motor.
Design of a three phase squirrel cage induction motor for. We all know that an electric motor is used for the conversion of electrical energy into mechanical energy. Pdf this paper presents the primary result of a research project whose aim is to improve efficiency of a three phase induction motor using amorphous. Motor design ltd is delighted to announce the release of motorcad v12 the latest version of our unique software package dedicated to the electromechanical performance of motors and generators and the optimisation of their cooling. Pdf winding design, modeling, and control for polephase. Design of cryogenic induction motor operating submerged in. Experimental results from the prototype inverter fed induction motor drive are presented in chapter 6 to validate the design and conformity to specifications. It is demonstrated that the optimal design produce better efficiency over the entire load range including energy saving which is. Simulink model of three phase induction motor file. These induction motors require special attention during its design process boldeo and nasar. Herbst the university of texas at austin center for electromechanics austin, tx 78712 j. Aluminum bars are molded on the slots and shortcircuited at both ends with a ring. Performing these calculations can help the engineer.
Stator of an induction motor consists of stator core and stator slots. Recall that leakage reactance is the reactance due to the rotor flux lines that do not also couple with the stator windings. A comparison of optimum design with the conventional design for a 2. It enables students to verify their design and analyze the performance of machine by changing relevant parameters in less time. Archana nanoty principal, djmit 3192014 emdii induction motor design viii sem electrical. The ipm ac brushless machines are synchronous motors with high poles the switched reluctance motor is a synchronous machine with high poles the reluctance synchronous motor is sort of in between, although it is a synchronous machine the pole number can be 4, 6 or 8 for traction. This discussion is not so much about induction motors as it is about motor design. How an induction motor works by equations and physics.
897 1038 249 1052 1400 479 1020 706 1472 126 1234 744 896 539 1244 892 1134 156 1436 1448 1475 29 459 37 1019 1183 505 488 1015 1072 300 1233 549 125 328 436 1198 1150 907