Q2 a 120 v shunt motor has the following parameters. To have a feeling about the potential position of the synrm in industry a performance. Stepper motors stepper motor an electromagnetic actuator. Single phase induction motors have very high starting torque. Detection of stator winding fault in induction motor using instantaneous power signature analysis ahmet kuc. Fall 2005 ee595s electric drive systems 3 voltsperhertz control. Applications of synchronous motors engineering tutorial. Single phase induction motor, theory of operation double revolving field. Unlike the asynchronous motor, it can work with a power factor equal to one or very close to it. The theory behind this project is based on representing the real motor by a set of equations and values in matlab using the subsystem feature, forming a corresponding idealistic motor in a way where all the physical effects are similar. Differences between synchronous motor and induction motor. The motors response to digital input pulses provides openloop control, making the motor simpler and less costly to control. A synchronous motor is composed of the following parts. Torque speed characteristics of converterfed dc drives week 3.
Single phase induction motors sizes vary from 1400 kw to 125 kw are used in toys, hair dryers, vending machines etc. Oct 29, 2014 modelling and analysis of electric machines by dr. Fig1 block diagram of scalar vf control technique for the speed control of induction motor 3. The motor which runs at synchronous speed is known as the synchronous motor. Stepper motor leaving certificate engineering notes. Advancements of inverter technique have made ac power supply very controllable. Design and performance analysis of high speed switched. They are generally more expensive than induction motor dri ves,but the advantages is that the efficiency is higher,which is tends to lower the life cycle cost.
Nptel video lectures, iit video lectures online, nptel youtube lectures. Record the readings of all the meters connected in the circuit and tabulate observation. Mar 10, 2015 making synchronous motor selfstarting a synchronous motor cannot start by itself. Krishna vasudevan,department of electrical engineering,iit madras. Therefore the life of the motor is simply dependant on the life of the bearing. Bee1101 1 st and 2 nd semester syallabus modulei 10 hours dc networks. Finally, control aspects of some special motors, such as permanent magnet synchronous motor, brushless dc motor, switched reluctance motor, etc. Loganathan umanand, does not currently have a detailed description and video lecture title. Motor contd with further algebraic manipulation and removing the ohmic loss and rate of change of magnetic energy terms, the electromechanical power developed by the motor can be expressed as.
Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. In this method, the starting torque is very low and it is not very. Electrical engineering basic electrical technology nptel. This book places emphasis on practice through the use of extensive modeling, simulation and analysis to. Synchronous motor working principle engineering tutorial. Induction machines guru nanak dev engineering college, ludhiana. Inverted or rotor fed induction motor electrical4u. Simulation of 3ph induction motor in matlab with direct. If you have watched this lecture and know what it is about, particularly what electrical engineering topics are discussed, please help us by commenting on this video with your suggested description and title. Nptel electrical engineering electrical machines ii. The electromagnetic torque of the synchronous motor.
In order to make the motor selfstarting, a squirrel cage winding also called damper winding is provided on the rotor. The present course advanced electric drives focuses on the dynamic control of. Modelling of the threephase induction motor using simulink k. Apr 02, 2008 lecture series on basic electrical technology by prof. Basic electrical technology basic electrical technology.
An induction motor can therefore be made without electrical connections to. In this method the rotor of the synchronous motor is rotated by an external motor and when the speed of the rotor reaches near synchronous speed, the dcfield is switched on and pull in takes place. The previous control strategies good steadystate but poor. The synchronous motor is used for converting the electrical energy into mechanical energy. Dc machine are the electromechanical energy conversion devices which converts either dc power to mechanical power or mechanical power to dc power. Rotating magnetic field, emf equation of an ac machine, torque developed in an induction.
This winding is spatially distributed for polyphase ac current. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more details on nptel visit. The synchronous speed is 1500 rpm and the typical full load speed is 1450 rpm. Weg standard product catalog motors, enclosed motor controls, gears, and. Synchronous and asynchronous electromechanicalsystems dr. Due to this, three phase induction motor is practically said to be constant speed motor as drop in. All we need to do is to keep daxis stator current constant. Chopper controlled dc drives single and multiquadrant converters, motoring and braking operations. The slip is the difference between synchronous and load speed 50 rpm. Threephase induction motor, construction and principle. It can be seen from that the figure that for the stable region of operation, the characteristics is similar to that of d.
Induction machines guru nanak dev engineering college. Starting the induction motor is the most important and dangerous step. Variable voltage variable frequency speed control of. Moduleiv 10 hours single phase induction motor, theory of operation double revolving field theory, equivalent circuit, determination of parameters methods of starting, split phase starting, repulsion starting, shaded pole starting, performance characteristics. Thus, both motor control and learning are seen as key fields of study for. They supply the electric power used by all sectors of modern societies. It supplies an induction motor ich has a full load speed of 144wh 0 rpm. A three phase, 10 pole, 600rpm, star connected alternator has 12 slots per pole with 8 conductors per slot and the windings are short chorded by 2 slots. It will also appeal to advanced students in automatic control, electrical, power systems, mechanical engineering and robotics, as well as mechatronic, process, and. Detection of stator winding fault in induction motor using.
Comparison between synchronous motor and 3phase induction. Vectorcontrolled induction motor drives the previous control strategies good steadystate but poor dynamic response oscillation resulted from the air gap flux vector control fieldoriented control is related to the phasor control of the rotor flux. Modelling of the threephase induction motor using simulink. Speed torque characteristics in three phase induction motor. Speed torque characteristics of separately excited dc motor.
Jason stephenson sleep meditation music recommended for you. All, aicte, cec, ignou, iimb, ncert, nios, nitttr, nptel, ugc. Simulation of speed control of induction motor when subjected to nonlinear variations in motor parameters international journal of power system operation and energy management issn print. This armature creates a rotating magnetic field inside the motor. This video lecture, part of the series basic electrical technology by prof.
It is an incremental drive digital actuator and is driven in fixed angular steps. Jul 30, 2018 another method of starting the synchronous motor drives is by external motor. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control constant slip control fieldoriented control. To obtain the variation of no load power and current and blocked rotor power and current with changes in the applied voltage to the stator. Massachusetts institute of technology department of electrical engineering and computer science 6. As a preliminary guideline, the diagram on the left hand side can be used. The synchronous speed is the constant speed at which motor generates the electromotive force.
An induction motor can therefore be made without electrical connections to the rotor. L umanand department of power electronics group, cedt iisc bangalore. Ensure motor is unloaded and the variac is set at zero position. An induction 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. Very reliable since there are no contact brushes in the motor. A wound rotor rotating field which has the same number of poles as the. Massachusetts institute of technology mit opencourseware. Synchronous reluctance motor synrm rotor geometry design procedure. Instead it is a cylindrical core constructed of steel laminations with conductor bars mounted parallel to the shaft and embedded near the surface of the rotor core. Krishnan electronic control of machines develops a systematic approach to motor drives.
Find the percentage slip and number of poles of the induction motor. Though these machines are useful for small outputs, they are not used for large powers as. The concept of motor learning, regarded as the set of internal processes associated with practice and experience that produce relatively permanent changes in the ability to produce motor activities through a specific skill, is also relevant in the context of neuroscience. Nptel syllabus advanced electric drives video course course outline. Lecture series on basic electrical technology by prof. Anju and rajasekaran design and performance analysis of high speed switched reluctance motor drive for various industrial applications fig.
The synchronous motor therefore has a number of advantages over the asynchronous motor with regard to its ability to be powered via the constant voltagefrequency line supply. The threedimensional model of the stator includes both endwindings and endshields in order to give a realistic picture of the motor. Module 8 threephase induction motor version 2 ee iit, kharagpur lesson 30 construction and principle of operation of im version 2 ee iit, kharagpur in the previous, i. It is available from fractional horsepower ratings to megawatt levels. The main winding of a single phase induction motor produces a magnetic field. May 18, 2008 lecture series on industrial automation and control by prof.
Instead it is a cylindrical core constructed of steel laminations with conductor bars mounted parallel to the shaft. Ac motors are invading into the application areas of motor drive, where dc motors have been predominantly used. Synchronous motor is one of the most efficient motors. In the first course, mainly the dc motor control both steady state and dynamic, and steady state torque and speed control of ac motors are emphasized. Transients in rl, rc and rlc circuits with dc excitation. Synchronous and asynchronous electricmotors the electric motor is an electromechanical continuous energy conversion equipment that converts electrical energy into electrical energy mechanical energy.
The air gap flux per pole contains a fundamental component of 0. The speed of the motor is constant, regardless of the load. Scalar control of the synchronous motor can also be demonstrated via the torque equation of sm, similar to that of an induction motor. Basic electrical technology nptel online videos, courses. Software tool for fast and optimized stator winding design of threephase induction motors 1. Electrical engineering electrical machines ii nptel. The motor becomes underexcited because the voltage is kept constant and the value of stator frequency is higher than the nominal one. Nptel provides elearning through online web and video courses various streams.
Uker, mehmet bayrak department of electricalelectronics engineering, faculty of engineering, sakarya university, sakarya, turkey received. Fall 2005 ee595s electric drive systems 36 the plan continued achieving 14. Firstly threephase induction motor drive system is simulated in various modes using matlabxilinx, then finally closed loop control of induction motor is simulated using vf method. This post will discuss synchronous motor, its construction, working principle, types, characteristics, starting methods, applications, model phasor diagram, advantages and disadvantages.
The ability to control their power factor makes it very demandable especially for low speed drives. A three phase, 12 pole, salient pole alternator is coupled to a diesel engine running at 500 rpm. To start with, 3phase supply is given to the stator winding while the rotor field winding is. Thus the motor is running at rated speed under no load condition. Nptel syllabus electrical machines i video course course outline synchronous machines. Synchronous motors synchronous motors are threephase ac motors which run at synchronous speed, synchronous motors have the following characteristics. To achieve this a suitable theoretical model is essential, thus a simple but complete motor model is developed. These notes has been made by me after watching nptel lectures given by dr. Short description technical report pdf available june 2017 with,556 reads. Kirchhoffs laws, node and mesh analysis, deltastar and stardelta transformations.
An induction motors rotor can be either wound type or squirrelcage type. Difference between synchronous and asynchronous motor. The developed power the output power, and the output torque. Thus, we can say, this kit is the heart of the proposed system. Induction motor im and permanent magnet synchronous motor, but with some special characteristics, the pmsm drives are ready to meet up sophisticated needs such as fast dynamic response, high power factor, and wide operating speed range, as a result, a gradual. A threephase stator similar to that of an induction motor. Right from its inception its ease of manufacture and its robustness have made it a very strong candidate for electromechanical energy conversion. Pdf software tool for fast and optimized stator winding. Nov 10, 2014 relaxing rain and thunder sounds, fall asleep faster, beat insomnia, sleep music, relaxation sounds duration. The speed which is desired is obtained at the output of the proposed system by comparing the reduced speed with reference speed of the induction motor. Speed control of synchronous motor pdf dc motor drive since ac motors were not capable of smoothly varying speed. Mod01 lec17 dynamic equations of induction machines youtube. Difference between synchronous and asynchronous motor the difference between synchronous and asynchronous motor are explained considering factors like its type, slip, requirement of additional power source, requirement of slip ring and brushes, their cost, efficiency, power factor, current supply, speed, self starting, effect in torque because of change in voltage, their operational speed and. Pdf computation of stator vibration of an induction.
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. Induction machines 1 introduction the induction machine was invented by nikola tesla in 1888. Electrical engineering special electromechanical systems nptel. Matlab simulation for speed control of three phase. Search wegsynchronousmotors50019091brochureenglish. The stator is the outer shell of the motor, which carries the armature winding. Wong department of electrical enginedng hong kong polytechnic university, hunghom, kowloon hong kong telephone. This mean that a digital signal is used to drive the motor and every time it receives a digital pulse it rotates a specific number of degrees in rotation. Since majority of modern drives are ac motor drives, the course centers around the control of ac motor drives. Introduction to synchronous motor the engineering projects. The product or represents the real permeability of the material, and is thus the analog of electrical conductivity. Threephase induction motor, rotating magnetic field in threephase induction motor, pdf, 0. Synchronous motor drives, 3 volts per hertz and vector controlled induction. Equivalent circuit number of phases 3 number of pole pairs 3 rms terminal voltage lineline 230 frequency hz 60 stator resistance r1.
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