Mostafa elshahed objectives learn a brief history of the electrical power systems construction. Before discussing the methods to control the speed of three phase induction motor one should know the basic formulas of speed and torque of three phase. The rotor will constantly be turning to align its magnetic field with that of the stator field. Single phase induction motor double revolving field theory the threephase induction motor starting torque inversely depends on the slip this implies that a small positive slip 0. In the case of three phase ac alternating current operation, the most widely used motor is a 3 phase induction motor, as this type of motor does not require an additional starting device. Threephase induction motor ppt download slideplayer. Induction motors have been traditionally used as constant speed motors supplied by the ac power source. Consider a single phase induction motor whose rotor is at rest. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor. Presentation on induction motor linkedin slideshare.
Differentiate between the various types of generating electric power stations. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor. For this example, refer to the motor equivalent circuit and calculations described above. Ppt threephase induction motor electrical engineering ee. View and download powerpoint presentations on three phase induction motor ppt. These are also called as asynchronous motors because an induction motor always runs at a speed lower than synchronous speed.
Record all nameplate information for the induction motor. The figure shows the connection of external resistance in the rotor of the induction motor. The main purpose of controlling the speed of three phase induction motor is to save unwanted energy. The basic idea of an electric motor is to generate two magnetic fields. Similarly in this post, we will made a powerpoint file accessible for all. A 3phase induction motor has two main parts i stator and ii rotor. An843, speed control of 3phase induction motor using. Understand the principle and the nature of single phase and 3 phase induction machines. Maintenance and troubleshooting three phase induction motor. Lecture 6 three phase induction motors cairo university.
Perform an analysis on induction machines which is the most rugged and the most. Speed control of three phase induction motor electrical4u. A variable frequency drive vfd is used to control the. Three phase induction motor powerpoint ppt presentation. Today we are going to made available a powerpoint presentation file for all. Threephase induction motors are the most common and frequently encountered machines in industry. In this application note, we will generate a third pwm in software, using a general purpose timer and an io pin resource that are readily available on the picmicro microcontroller. Presentation on 3 phase motor free download as powerpoint presentation. Free download induction motor seminar ppt, pdf report. These types of motors are known as selfstarting induction motors. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes.
The 3phase set of currents, each of equal magnitude and with a phase. By default, the block sets the simulation type parameter to continuous to use a continuous sample time during simulation. As previously, we have covered a lot of important topics. Three phase induction motor is a generally selfstarting motor. 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. Similarly in this post, we will made a powerpoint file accessible. Efficiency of induction motor when the induction motor is connected to a 3phase supply, current flows in the primary circuit, heat is produced in the stator conductor as copper loss no load current also flows and further power is lost as iron losses power than flow through the air gap as magnetic field energy, there will be no loss in the air gap further energy is lost in the rotor winding as.
Only the stator winding is fed from the 3phase supply. Home engineering electrical electronics speed control of three phase induction motor ppt. The singlephase induction motor is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth. At the end of the lecture, student should be able to. Testing and inspection of surge protection devices. The stator works as the primary while the rotor works as the secondary. Most industries use squirrel cage induction motor with a starter for starting purpose. Working principle of 3 phase induction motor youtube. Introduction an induction motor im is a type of asynchronous ac motor where power is supplied to the rotating device by means of electromagnetic.
Generally, an ebook can be downloaded in five minutes or less. However, recently, it has been increasingly used as variable speed motors driven by an inverter. Ppt induction motor powerpoint presentation free to download. The threephase induction motor is also called an asynchronous motor and it is the most commonly used type of motor in industrial applications. Download 3 phase induction motor powerpoint presentation today we are going to made available a powerpoint presentation file for all. Resistance tests on resistance temperature detector rtd circuits.
A 3phase, y connected, 460 volt line to line, 25 horsepower, 60 hz, 8 pole induction motor has the following constants, in ohms per phase referred to the stator. Disadvantages of 3 phase induction motor induction motor has low inherent starting torque draw large starting currents, typically 68 x their full load values speeds not easily controlled as dc motors operate with a poor lagging power factor when lightly loaded induction motor components an induction motor has two main parts. Presentation on 3 phase motor electromagnetic induction machines. Contents 1introduction 2 history 3 principle of operation 4 starting of motor 5 speed control 6 types of 3 phase induction motors 7 construction 8 production of rotating magnetic field. Overview in this module, we first discuss about the types and constructional features of 3phase induction motors. Threephase induction motors are the most common and frequently encountered machines in industry it can be. Relative humidity shall be below 95%rh for totallyenclosed types, and below. Electrical machine 3 phase induction motor authorstream. At the instant of starting, a 3phase induction motor is like a transformer whose secondary side is short circuited slip s1.
Three phase induction motors used in explosive atmospheres w60 line squirrel cage rotor horizontal date. Download 3 phase induction motor powerpoint presentation. Principle of operation, development of equivalent circuit, derivation of torque expression are discussed in sequence. Presentation on 3 phase motor electromagnetic induction. One singlephase wattmeter plus miscellaneous apparatus as needed. The rotor is separated from the stator by a small airgap which ranges from 0.
In this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. If the induction motor is operating in the linear magnetic region, the lm is constant. There are two types of rotors which are employed in 3 phase induction motor. Multi phase induction motors types, their working and. Speed control of three phase induction motor ppt play ppt. A 3 phase induction motor has two main parts i stator and ii rotor.
Inverter not only adjusts the speed but also adjusts the voltage to the motor. Construction a 3phase induction motor has two main parts i stator and ii rotor. This application note also covers the basics of induction motors and different types of induction motors. An electrical motor is an electromechanical device which converts electrical energy into mechanical energy.
Induction motor seminar ppt, pdf report study mafia. Specifically, the squirrel cage design is the most extensively used electric motor in industrial applications. Ppt induction motor powerpoint presentation free to. You can download free ppt threephase induction motor electrical engineering ee notes edurev pdf from edurev by using search above. Ppt three phase induction motor powerpoint presentation, free.
You should also make a dc measurement of stator winding linetoline resistance. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. A single phase induction motor is inherently not selfstaring can be shown easily. The induction motor block implements a threephase induction motor. Then, equation 1 can be shown in terms of magnitude as. Threephase induction motors are run at a constant speed from no. The main body of the induction motor comprises of two major parts as shows.
The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor. The major difference between them is that transformer is static in nature i. A three phase induction motor is basically a constant speed motor so its somewhat difficult to control its speed. Induction motors are the most commonly used motors in many applications. Find powerpoint presentations and slides using the power of, find free presentations research about three phase induction motor ppt. Explain starting methods of 3 phase induction motor. The block uses the threephase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed. List and describe the more commonly used equipment in an electric substation. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i.
255 729 1307 1594 1620 341 1562 174 1598 135 1628 1339 1268 504 541 1079 1614 1406 999 55 1041 223 137 940 1311 1687 1311 1072 865 1612 300 60 564 22 1141 777 400 848 59 532 62 1076 19 1254 533 250 516 778