Nov 27, 2019 thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. Three phase induction motor construction your electrical guide. Understand the principle and the nature of single phase and 3 phase induction machines. The induction motor is a threephase ac motor and is the most widely used machine. Suad ibrahim shahl 26 equivalent circuit model analysis example a 480v, 60 hz, 6pole, three phase, deltaconnected induction motor has the following parameters. Construction, types and principle of operation of 3phase induction motors. Induction motor basics, single phase and three phase. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation. If the motor is not in operation over three months, add grease to each bearing per lubrication nameplate. Pdf construction of three phase linear induction motor.
It is mostly used in industrial drives because it is very reasonable and vigorous, economical and reliable. Other motors that are included are 1phase induction motors, permanent synchronous motors and synchronous reluctance motors. When three phase stator winding of an induction motor is energized from a 3 phase supply, a rotating magnetic field is set up which rotates around the stator at synchronous speed n s. Know about the most popular and almost unbreakable construction of squirrel cage induction motor. We arrange the three phase winding in such a manner in the slots that they produce one rotating magnetic field when we switch on the three phase ac supply source. This paper explores the construction process of a linear induction motor lim, the basic concepts behind key aspects of linear induction machines construction and the testing process of a working. The design of y2 series induction motor absorbed the advanced technology of electric motors around the world. Feb 15, 2017 construction of three phase induction motor magic marks duration. For those watercooling motors or using bearings with watercooling coils, the.
The three phase transformer is constructed in two ways. Other motors that are included are 1 phase induction motors, permanent synchronous motors and synchronous reluctance motors. Threephase squirrelcage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. These are of two types, squirrel cage and slip ring motors. The electric motor has its name derived from the fact that the rotor assemble resembles the wheel of a squirrels cage. The rotor is separated from the stator by a small airgap which ranges from 0. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. A wound rotor, has a 3phase winding similar to the stator winding. The working of the three phase induction motor is based on the principle of electromagnetic induction. Always the stator and rotor is separated with a small air gap ranging from 0.
The stator of the motor consists of overlapping winding offset by an electrical angle of 120o. Be careful it can hurt to tangle with a three phase motor. These motors are selfstarting and use no capacitor, start winding, centrifugal switch or other starting device. Basic construction of 3phase ac induction motors you should. Construction of three phase induction motor electrical4u. Its characteristic features are simple and rugged construction low cost and minimum maintenance high reliability and sufficiently high efficiency no need of extra starting motor and need not be. These motors can be operated either directly from the mains or from adjustable variable frequency drives.
Suad ibrahim shahl 26 equivalent circuit model analysis example a 480v, 60 hz, 6pole, threephase, deltaconnected induction motor has the following parameters. The video highlights details regarding the construction of three phase induction motor. Thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. We will have a look at both stator and rotor one by one below. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy. Third international conference on advances in control and optimization of dynamical systems march 15, 2014. Wound rotor induction motor the engineering projects. Today we are going to made available a powerpoint presentation file for all. 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. The principle of operation of this motor is based on the.
In the wound rotor, an insulated 3phase winding similar to the stator winding. The video tutorial is essentially a part of the basic electrical and electronics engineering. Single phase induction motor the engineering projects. Threephase synchronous motor in this article, we ave covered threephase synchronous motor construction, working principle, starting methods, and applications in details. Like any electric motor, a 3phase induction motor has a stator and a rotor. Basic construction of 3phase ac induction motors you.
The stator carries a 3phase winding called stator winding while the rotor carries a shortcircuited winding called rotor winding only the stator winding is fed from the 3phase supply. So, first of all have a look at the functionality of stator of single phase induction motor. An induction motors rotor can be either wound type or squirrelcage type. Introductionan induction motorim is a type ofasynchronous acmotor where power is supplied to therotating device bymeans ofelectromagneticinduction threephase induction motors 4. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, the absence of commutator and good speed regulation. Threephase transformer construction a three phase transformer is used to transfer a large amount of power. The operating principle of a 3 phase induction motor is based on the production of r. We also discuss the construction of a three phase motor including its stator and rotor. It is also called asynchronous motor because it does not run at a synchronous speed. 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. Design of a three phase squirrel cage induction motor for.
Threephase squirrelcage induction motors are widely used as industrial drives because they are selfstarting, reliable and economical. A rotor and a stator are the two main components of single phase induction motor. Induction motors are maintenance free motors unlike dc motors and synchronous motors. Singlephase induction motors are used extensively for smaller loads, such as. Advantages and disadvantages of 3 phase induction motors. They run at a constant speed from noload to the full load. A single phase induction motor is inherently not selfstaring can be shown easily. The rotor will constantly be turning to align its magnetic field with that of the stator field. An induction motor can therefore be made without electrical connections to the rotor. Historythe induction motor with a wrapped rotor wasinvented by nikola tesla in. Let us discuss on basic information about this motor and its special controlling technique of svpwm.
It is almost same for any given synchronous motor or a generator. Electrical academia learn electrical technology online for free. A three phase induction motor runs on a three phase ac supply. Ac induction motors are also the most common motors used in main powered home appliances. A 3 phase induction motor can be used for different applications with various speed and load requirements. Y2 series three phase induction motor i asynchronous motor y2 series three phase asynchronous motor is a kind of totally enclosed fancooled tefc squirrelcage induction motor. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. The major difference between them is that transformer is static in nature i. Although single phase induction motor is more simple in construction and is cheaper than a 3phase induction motor of the same frame size, it is less efficient and it operates at lower power factor.
Oct 05, 2016 the basic construction of single phase induction motor is similar to all other motors. Enter your email below to receive free informative articles on. Download 3 phase induction motor powerpoint presentation. A wound rotor induction motor is also known as slip ring induction motor. If the speeds become equal, there would be no such relative speed, so no emf induced in the rotor, and no current would be flowing, and therefore no torque would be generated. For industrial and mining applications, 3phase ac induction motors are the prime movers for the vast majority of machines. Parida department of electrical engineering national institute of technology, silchar,assam, india email. The induction motor is made up of the stator, or stationary windings, and the rotor.
The three phase transformer is required to stepup and stepdown the voltages at various stages of a power system network. Nov 27, 2019 the three phase induction motor is the most widely used electrical motor. The three phase ac induction motor is a rotating electric machine that is designed to operate on three phase supply. When the primary winding or stator is connected to a three phase alternating current supply, it. Also appreciate the rugged construction of squirrel cage rotor and know the spectacular reasons for the skewed arrangements of the rotor conductors. A 3 phase induction motor has two main parts i stator and ii rotor. The most common type of three phase induction motor is the squirrel cage type. Parts of an induction motor three phase induction motor.
Today, i am going to tell you about a wound rotor induction motor, which is also a type of 3 phase induction motor. Jan 15, 2014 the video highlights details regarding the construction of three phase induction motor. Although single phase induction motor is more simple in construction and is cheaper than a 3 phase induction motor of the same frame size, it is less efficient and it operates at lower power factor. Nov 04, 2012 introductionan induction motor im is a type ofasynchronous acmotor where power is supplied to therotating device bymeans ofelectromagneticinduction three phase induction motors 4. Free download induction motor seminar ppt, pdf report. Three phase ac induction motors are widely used in industrial and commercial applications.
Induction motor basics, single phase and three phase induction. Perform an analysis on induction machines which is the most rugged and the most. Speed torque characteristics of 3 phase induction motor. A wound rotor has a 3phase winding, similar to the one on the stator. Three phase squirrelcage induction motors are widely used as industrial drives because they are selfstarting, reliable and economical. Construction of squirrel cage induction motor explained. It is made up of number of stampings, which are slotted to receive the windings. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy to mechanical energy, and vice versa. The three phase windings are placed on the slots of laminated core and these windings are electrically spaced 120 degrees apart. Construction of induction motor the three phase induction motor is a preferable type of motor.
Kanpur, india design of a three phase squirrel cage induction motor for electric propulsion system ravi prakash,mohammad junaidakhtar, r. 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. Oct 10, 2016 today, i am going to tell you about a wound rotor induction motor, which is also a type of 3 phase induction motor. Whenever the motor temperature is equal to and below.
Foundations should be strong and free of vibration. At the end of the lecture, student should be able to. An induction motor s rotor can be either wound type or squirrelcage type. The three phase induction motor is the most widely used electrical motor. A simple explanation of how a 3 phase induction motor works. The basic construction of single phase induction motor is similar to all other motors. On this topic, i will explain in details about 3 phase induction motor construction before we talked about parts of the electric motor generally but on this topic, we will go deep for 3 phase induction motor construction only. Like any electric motor, a 3 phase induction motor has a stator and a rotor. The stator of an induction motor consists of a number of overlapping windings offset by an electrical angle of 120. The stator of three phase induction motor is made up of numbers of slots to construct a 3 phase winding circuit which we connect with 3 phase ac source.
The 3phase set of currents, each of equal magnitude and with a phase. The ac induction motor is the most used electrical motor in industrial applications worldwide. As previously, we have covered a lot of important topics. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. The stator carries a 3 phase winding called stator winding while the rotor carries a shortcircuited winding called rotor winding only the stator winding is fed from the 3 phase supply. Construction of three phase induction motor my tech info. Be careful it can hurt to tangle with a threephase motor. I will tell about the construction of a wound rotor later in this article. Y2 series 3phase induction motors are characterized with.
Threephase induction motor common itemsiinstruction manual. Electrical academia learn electrical technology online. This 3 phase motor is also called as an asynchronous motor. The performance over a wide range of applications makes threephase induction motors accountable for 85 percent of the installed capacity of the industrial driving systems. Induction motor seminar ppt, pdf report study mafia. Know about the different winding slots, lamination of the stator and its construction. Historythe induction motor with a wrapped rotor wasinvented by nikola tesla in 1888 in the unitedstates. A website for electrical engineering education on machines,circuits,power systems,measurements,control systems,power electronics with projects online. Construction of three phase induction motor consist of 2 important parts namely stator and rotor. The 3 phase set of currents, each of equal magnitude and with a phase.
995 118 355 761 1233 1062 287 145 525 211 488 669 955 1155 1493 63 903 725 981 650 1395 97 770 177 716 367 1208 679 1149 1493 1378 1377 466 1433 652 109 721 696