This standard specification describes the requirements for the contractor to overhaul ashore in a suitable repair facility an alternating current ac induction or synchronous motor removed from a coast guard vessel. Scalar vf control of 3phase induction motors texas instruments. It comprises an enclosure in steel or plastic, a contactor, start contact, link wires and stop start buttons. These motors are squirrel and slipring type induction motors. For details and the theoretical background of each macro, see the pdf documents in. Start induction motor dynamic and steadystate performance of a. 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. Parida department of electrical engineering national institute of technology, silchar,assam, india email. A singlephase motor is a rotating machine that has both main and auxiliary windings and a squirrelcage rotor. Installation and maintenance three phase induction motors 3 4850 en 2019. This would result in a balanced three phase current.
Threephase or polyphase motors are of mainly two types. The frame of three phase induction motor should be strong and rigid as the air gap length of three phase induction motor is very small. While this is not a severe problem for small motors. This document does not claim any originality and cannot be used as a. Three phase induction motor consists of a stator and a rotor, and there is no electrical connection between these two. The sinusoidal stator phase currents fed in the stator coils create a magnetic field. They are found everywhere from a small workshop to a large manufacturing industry.
Lecture 6 three phase induction motors cairo university. It acts as a covering and provides protection and mechanical strength to all the inner parts of the machine. Simulink model of three phase induction motor file. Windingrotor arrangements for 3 phase induction machine three phase slip ring induction motor. Three phase induction motors authorstream presentation. Single phase induction motor the single phase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth.
The advantages of threephase ac induction motor are listed below. This manual covers squirrel cage rotor motor where the rotor. Design and implementation of three phase induction motor control system in closeloop mode. Be careful it can hurt to tangle with a three phase motor. Mostafa elshahed objectives learn a brief history of the electrical power systems construction.
Documentation of storage, transportation, installation and examination. In the event that such defects are caused by wear, inappropriate operation by the customer, uses that go beyond. Three phase induction motors used in explosive atmospheres w60 line squirrel. Ppt induction motor powerpoint presentation free to. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. Ppt single phase induction powerpoint presentation. Search wegthreephaseinductionmotorstlinesquirrelcage. This article concentrates only on threephase induction motor and its protection. It consists stator winding it is housed on the motor frame. The stator carries a 3phase winding called stator winding while the rotor carries a shortcircuited winding called rotor winding. The stator threephase windings can also be connected in a delta configuration. Scribd is the worlds largest social reading and publishing site. Threephase induction motors authorstream presentation. The induction motor block implements a three phase induction motor.
There are two types of rotors which are employed in 3 phase induction motor. Ppt single phase induction powerpoint presentation free. When the supplied three phase voltage is unbalanced, the startup transients, dynamic performance and steady state characteristics of the three phase induction motor will vary accordingly. The bars forming the conductors along the rotor axis are connected by a thick metal ring at the ends, resulting in a short circuit as shown in figure 1. Nov 07, 2011 it protects the inner part of the machine. These are excited by a balanced three phase voltage supply. The induction motor is made up of the stator, or stationary windings, and the rotor. The framework uses the following modules refer to pdf documents in the 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. Assuming that the stator resistance r1 is measured at dc and that phase power. Synchronous motors are special types of motors used in constant speed applications, whereas most of the motors used in the industrial applications are of induction type. Motor threephase 400v ac induction motor acim power supply specification for mcu 3. List and describe the more commonly used equipment in an electric substation.
Three phase induction motor free download as powerpoint presentation. The most common type of ac motor being used throughout the work today is the induction motor. Insulation resistance test should be performed once every three months. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. A theoretical background on scalar motor control principle. The motor is supplied by balanced threephase voltage at the terminals. Simulink model of three phase induction motor file exchange. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation. Applications of three phase induction motors of size varying from half a kilowatt to thousands of kilowatts are numerous. These symbols appear in this document whenever it is. Installation and maintenance threephase induction motors. The stator carries a 3phase winding called stator winding while the rotor carries a shortcircuited winding.
You should also make a dc measurement of stator winding linetoline resistance. Threephase induction motor simulink mathworks india. Free download induction motor seminar ppt, pdf report. As previously, we have covered a lot of important topics. The induction motor block implements a threephase induction motor. Induction machines guru nanak dev engineering college. The singlephase motor stator has a laminated iron core with two windings arranged perpendicularly. Induction motor seminar ppt, pdf report study mafia. Equations 1 3 represent the currents that ow in the three phase windings. The major difference between them is that transformer is static in nature i. However, for reasons of clarification, the machine will be referred to as a motor. Design of a three phase squirrel cage induction motor for. Brushless dc motor fundamentals application note monolithic.
The three phase induction motor is the most widely used electrical motor. The single phase induction motor resembles, threephase, squirrelcage motor except that, single phase induction motor has no starting torque and some special arrangement have to be made to make it as self starting. The block uses the threephase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed. A free powerpoint ppt presentation displayed as a flash slide show on id. If the motor is not in operation over three months, add grease to each bearing per lubrication nameplate.
Frame provides mechanical support to the stator and rotor. Applications of threephase induction motors of size varying from half a kilowatt to thousands of kilowatts are numerous. Presentation on 3 phase motor electromagnetic induction machines. Search wegthreephaseinductionmotorsmasterline50019089. Supplying of both main and auxiliary windings enables the singlephase machine to be driven as a twophase machine. A wound rotor or slip ring motor has a 3phase winding, similar to the stator winding. The thermal overload is supplied as a separate item. Threephase induction motor common itemsiinstruction manual. Squirrel cage induction motors draw 500% to over % of full load current flc during starting. The single phase motor stator has a laminated iron core with two windings arranged perpendicularly. Three phase induction motor electromagnetic induction.
Pdf on may 21, 2006, walid balid and others published 3phase ac induction motor find, read and cite all the research you. A successful salesman for general electrics motor division once remarked to one of your instructors that, when asked by a customer how a motor. Kanpur, india design of a three phase squirrel cage induction motor for electric propulsion system ravi prakash,mohammad junaidakhtar, r. The single phase induction motor comes with the different starting arrangements.
In the event that defects in working or incorrect assemblyoccur, i. Induction motors ppt transformer electrical engineering. Today we are going to made available a powerpoint presentation file for all. The friction and windage losses are 600 w, the core losses are 1800 w, and the stray losses are negligible. One single phase wattmeter plus miscellaneous apparatus as needed. 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. A theoretical background on field oriented motor control principle. Induction motor fault heading fault causes remedies induction motor a no supply voltage b driven equipment jam c motor shaft jammed. Record all nameplate information for the induction motor. Three phase induction motors used in explosive atmospheres w60 line squirrel cage rotor horizontal date. Like any electric motor, a 3phase induction motor has a stator and a rotor. These stator and rotors are made up of highmagnetic core materials with less hysteresis and eddy current losses. This instruction manual applies to both motors and induction generators. This motor benefits from the experience of one of the largest manufacturers in the world, using stateoftheart technology in automation, specially selected materials and rigorous quality control.
Sensorless field oriented control of 3phase induction motors. Third international conference on advances in control and optimization of dynamical systems march 15, 2014. Directonline dol motor starter description the direct on line motor starter dol is designed to switch a single or three phase induction motor at rated voltage. Threephase and sixphase induction motor electromagnetic. A 3 phase induction motor can be used for different applications with various speed and load requirements. Differentiate between the various types of generating electric power stations. Presentation on 3 phase motor free download as powerpoint presentation. These are excited by a balanced threephase voltage supply. Be careful it can hurt to tangle with a threephase motor. Documentation of storage, transportation, installation and examination, if required, shall be inquired of tecos service center before start and maintenance. This application note provides a general overview of bldc motors.
The stator copper losses are 2 kw, and the rotor copper losses are 700 w. This document was uploaded by user and they confirmed that they have the permission to share it. The rotor winding terminals are connected to three slip rings which turn with the rotor. Threephase induction motor protection systems and its. Installation and maintenance threephase induction motors 3 4850 en 2019. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. Download 3 phase induction motor powerpoint presentation. In this chapter, we shall focus our attention on the construction. The same field is utilized by one of the stator windings to work as an induction motor to meet mechanical load while, a three phase emf is induced in the other two sets of windings. The frame is either made up of diecast or fabricated steel. Pdf induction motors have been the workhorse of industry since decades.
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. Further, in an induction machine, the windings are not all located in the same. The single phase induction motor resembles, three phase, squirrelcage motor except that, single phase induction motor has no starting torque and some special arrangement have to be made to make it as self starting. 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, absence of commutator and good speed regulation.
Only the stator winding is fed from the 3phase supply. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Single phase induction motor speed control this project is designed to control the speed of a singlephase induction motor by using operating knob. It is widely used when compared to the three phase motor for. Dq based modeling of three phase induction motor is presented in this model.
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