It is logical that the least expensive, lowest maintenance type motor should be used most often. Due to decreased voltage, torque is also reduced resulting in a soft, or easy start. A single phase induction motor is an electric motor that operates on a single waveform of alternating current. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the help of a primary winding. Ppt induction motor powerpoint presentation free to download. An induction motors rotor can be either wound type or squirrelcage. Sep 27, 2016 at full load power factor of an induction motor ranges from 0. At the end of the lecture, student should be able to. Focus on the different types of motors used in industry. Single phase induction motors are used primarily for domestic and lightindustrial applications where threephase supply is generally not available. At full load power factor of an induction motor ranges from 0. Ppt threephase induction motor electrical engineering.
Introduction to induction motor instrumentation and. Induction motors have been ruling the industrial world for many decades. Three phase induction motor faults and their causes. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. There are two types of rotors which are employed in 3 phase induction motor. Perform an analysis on induction machines which is the most rugged and the most. Some of the advantages of induction motors compared to dc motors and synchronous motors. Presentation introduction requirement of speed control type of method to control of induction motor. Types of single phase induction motors single phase. Induction motor drives with closedloop control are used in similar applications to d. Electrical motor electric motor electromagnetic induction. Synchronous speed means the speed of the rotating magnetic field in the stator.
The 3 phase induction motor is usually called according to the type of its rotor to distinguish between the two types wound rotor type. Induction motors are of two types based on the construction. Mechanical methods are impractical and, therefore the motor is started temporarily converting it into two phase motor. A repulsion induction motor is a form of repulsion motor that has a squirrelcage winding in the rotor in addition to the repulsion motor winding. In an induction motor, the electric current in the rotor needed to produce torque is obtained via electromagnetic induction. Chapter 7 threephase induction motor electrical machines. Soft starters are used on all types of ac and dc motors. Different types of fault in three phase induction motor. Soft starters enable the ac induction motor to speed up in smaller, resulting in less current drawn than with a traditional motor starter. Types of electric motors electric motors dc motors other motors h ac motors s unt motor separately excited induction motor stepper motor motor brushlessdc motor series motor hysteresis motor permanent magnet dc pmdc synchronous motor reluctance motor compounded motor universal motor. Induction motors are the most commonly used motors in many applications. An induction motor also known as an asynchronous motor is a commonly used ac electric motor. Generally, two types of induction motors are used in our industry such as wound rotor and squirrel cage rotor, but their faults are almost same. Generally, there are two types of the induction motors known as single phase.
Introduction the threephase induction motor is the extensively used for various kinds of industrial drives. Types of induction basically there are two types of inductions, formal induction and informal induction. When the motor is connected to a singlephase power supply, the main winding carries an alternating current. Formal induction is a planned attempt to introduce new employees to the organization, job and the working environment. Starting methods of a single phase induction motor the single phase motor is not self starting and hence needs an auxiliary means or equipment to start the single phase induction motor. Soft starters applications and types of soft starters. Different types of servo motor and its applications. Dec 29, 2017 apr 07, 2020 ppt threephase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. We hope that you have got a better understanding of this concept. May 05, 2016 focus on the different types of motors used in industry.
Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. A repulsion motor is a type of electric motor which runs on alternating current ac. There are mainly two types of induction motor on the basis of power supply, single phase induction motor and three phase induction motor. Most ac induction motors operate using singlephase ac power lines. Ac induction motors may be twospeed, singlespeed or variablespeed.
Figure 2 illustrates the capacitorstart induction motor. Single phase and three phase are the two types of an ac induction motor. 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. There are two different types of the structure and similar in electrical properties. Induction motor basics, single phase and three phase induction. Based on the construction there are two distinct types of ac servo motors, they are synchronous type ac servo motor and induction type ac servo motor.
Thus, this is all about types of servo motor and its applications. Written for professionals who work in electric motors, this covers updated traction applications, the latest on solidstate motordrive controllers, electrical and mechanical parameters, specifications, shapes, performance, protection, and more. Threephase induction motors authorstream presentation. Starting methods of a single phase induction motor. Ppt induction motor powerpoint presentation free to. Torque control of dc motors contd the field flux f f produced by field current if is orthogonal to the armature flux a a produced by the armature current ia. Induction motor, working with ac supply, consisting of a rotating magnetic field and stationary rotor find about two types single phase and three phase. Based on the rotor construction, these motors are classified into two types namely squirrel cage. Introduction to induction motor the engineering projects. There are two basic reasons for the use of singlephase motors rather than 3phase motors. The rotor composes of concentric strips of magnetic iron isolated from each other. These are also called as asynchronous motors, because an induction motor always runs at a speed lower than synchronous speed.
The rotor of an induction motor can be a squirrel cage. Singlephase induction motors are used in residential applications for ac motor appliances in single, or multiple dwellings. There are three types of single phase induction motors which are the shaded pole, split phased, and capacitor. The singlephase induction motor is not an automatic starter motor that we will discuss later and the threephase induction motor is an automatic starter motor.
May 19, 2018 there are mainly two types of induction motor on the basis of power supply, single phase induction motor and three phase induction motor. This document is highly rated by electrical engineering ee students and has been viewed 2456 times. Speed control of induction motor detailed explanation. Induction motor seminar ppt, pdf report study mafia.
These drives are also particularly suited to applications that must operate at very high speeds with a high level of field weakening, for example spindle motors. Free download induction motor seminar ppt, pdf report. The singlephase induction motor is not selfstarting. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of. For reason of economy, most houses, offices and also rural areas are supplied with single phase a. The stator works as the primary while the rotor works as the secondary. This motor is used in automatic door opening and closing in public places like hospitals, theaters and supermarkets. The singlephase motor stator has a laminated iron core with two windings arranged perpendicularly.
Squirrel cage rotor wound type rotor or slip ring type rotor squirrel cage rotor in this type. Induction motor mainly uses electromagnetic induction for changing the energy from electric to mechanical. Squirrel cage induction motor and slip ring induction motors. Threephase induction motor ppt download slideplayer. The electric motor which runs asynchronous speed is known as induction motor, and an alternate name of this motor is the asynchronous motor. Ac induction motors are also the most common motors used in main powered home appliances. This final thesis will mostly be dedicated to induction motors but also to synchronous permanent magnet and reluctance motors. Squirrel cage induction motors are widely used in motor and drive applications. When purchasing a motor, its often asked which technology is better, ac or dc, but the fact is that it is application and cost dependent. Oct 02, 2009 types of induction basically there are two types of inductions, formal induction and informal induction.
A motor of this type may have either a constantspeed see mg11. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. The rotor will constantly be turning to align its magnetic field with that of the stator field. The stator consists of a cylindrical frame and stator core. As their name suggests, 1 phase ac power supply is extended to single phase induction motor while three phase induction motor is connected to 3 phase ac power supply. An induction motor can therefore be made without electrical connections to the rotor. Ppt presentation on speed control of induction motor nilesh. In the induction motors used in lift and hoists, you will see a type of.
Electrical motor free download as powerpoint presentation. Rotor as the name suggests it is a rotating part of an electrical machine, in which current is induced by transformer action from rotating magnetic field. Apr 07, 2020 ppt threephase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Types of single phase induction motors electronics hub. The method is characterized by less investment, simple equipment and small quantity. Now lets just take a brief look on types of induction motor. Sr class cp and sr class sl electric multiple units but has been superseded by other types of motors. By far the most commonly used ac motor is the induction motor. The threephase induction motor is the extensively used for various kinds of industrial drives.
The basic idea of an electric motor is to generate two magnetic fields. An induction motor is also called asynchronous motor as it runs at a speed other than the synchronous speed. Understand the principle and the nature of single phase and 3 phase induction machines. The 3phase set of currents, each of equal magnitude and with a phase. 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.
It is sized to provide high starting torque, as much as 300% of rated torque. Basically, there are two types of induction motors that depend on the input power. As mentioned above that, due to the rotating magnetic field of the stator, the induction motor becomes self starting. The capacitorstart motor uses a capacitor to produce a phase shift. As we know the speed of induction motor, torque of induction motor, so, the speed of induction motor can be changed by changing synchronous speed or by changing the slip of induction motor and then parameter r2 and x2 are changed then torque remain constant and change in slip is affected in speed control. Learn all about induction motors including the working principle of an induction motor, and the different types of induction motors available. Synchronoustype ac servo motor consist of stator and rotor. Different types of electric motors and their applications. Here we have classified these faults in three types, but these are further sub divided. Differentiate between the various types of generating electric power stations. A 3 phase induction motor can be used for different applications with various speed and load requirements. Ppt threephase induction motor electrical engineering ee.
There are two types of induction motors, one with wound type rotor, also called slipring motor and another one with squirrelcage rotor. Directonline starting this kind of starting mode is the most basic and simplest in the motor starting. The starting methods of three phase induction motor generally are directonline starting, reducedvoltage starting and soft starter. 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. For this reason, they are sometimes referred to as polyphase ac induction motors. It was formerly used as a traction motor for electric trains e. Singlephase induction motor threephase induction motor singlephase induction motor there are probably more singlephase ac induction motors in use today than the total of all the other types put together. Learn what a three phase induction motor is, how it is constructed, and its working principle. The stator separate from rotor by small air gap have ranges from 0. Splitphase induction motor spim circuit wiring diagram and torquespeed curve. The threephase induction motor is the extensively used for various kinds of. Alternating current, or ac, induction motors are one of the major types of elevator motors used today.
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