A look into the applications of robot arms in industrial factories such as welding, painting, assembly and transportation, etc. You can also get course completion certification for some of the courses. Losses and torque equation, losses and efficiency calculation in d. Pdf be8251 basic electrical and electronics engineering. Just like a dc machine, a same induction machine can be used as an induction motor as well as an induction generator, without any internal modifications. Electric motors and drives fundamentals, types and applications third edition austin hughes senior fellow, school of electronic and electrical engineering, university of leeds amsterdam boston heidelberg london new york oxford paris san diego san francisco singapore sydney tokyo newnes is an imprint of. Electrical machinesi nptel online videos, courses iit. Dc motor introduction, principle and working introduction. Electrical engineering industrial drives power electronics nptel. These motors are ideally suited for hightorque applications because the current in both the stator and armature increases under load. Hence dc motors are always a good ground for advanced control algorithm.
Lecture 05 dc motors electric motor power engineering. Principle of operation of dc motors, types of dc motors. Before starting to explain how an induction asynchronous generator works, i assume that you know the working principle of an induction motor. Then the course will start covering this focusareas one by one such as vehicle dynamics, motors, power electronics, batteries,charging etc. Pdf power electronics and drives used in automotive. Dc machines in dc machines, the field winding is wound onto the stator, while the armature winding is located on the rotor. Pdf basic electrical engineering 1st year ebook, notes. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion.
Induction generators are also called as asynchronous generators. Single phase emf generation, average and effective values of sinusoids, j operations, complex representation of impedance, phasor diagrams, power factor. There are, of course, many ways of building permanent magnet motors, but we will consider only a few in this. The permanent magnet motor uses a permanent magnet to create field flux. Apr 01, 2008 lecture series on basic electrical technology by prof. At latest count, the department has 43 active faculty, 56 staff members, 311 graduate students, 50 postdoctoral associates, research associates and visitors. Electric vehicles part 1 indian institute of technology delhi and nptel via swayam 1 93. The book covers the following topics three phase circuits and power magnetics transformers concept of electrical machiners dc motors three phase windings induction machines. Its operation is based on the principle that when a current carrying conductor is placed in a. Dc machine drives and control of ev using dc machine taught by prof. Kirchhoffs laws, node and mesh analysis, deltastar and stardelta transformations. Electrical machines 1 pdf notes em 1 pdf notes smartzworld. The direction of the lines of force is given by the law of the screwdriver.
Besides perfor ming the propulsion of p evs with induction motors, the dc motors are used in order to m anage the aux iliary sys tems su ch as air conditioning ac com pressor and pum ps 5 7. Basic electrical engineering pdf free download bee notes pdf. Modeling of dc motor the most common device used as an actuator in mechanical control is the dc motor. According to the most common industry naming conventions of today, there are three dc motor subtypes. A rotating armature coil passes through a magnetic field that develops between the north and. These applications include ship propulsion, mine hoists and steel rolling mills. These motors are lesser when compared with ac models. The system structure of a dc motor is depicted in figure22, including the. In this lesson we discuss speed and position control with dc motors. Home mechanical engineering college of science and. Dc motor introduction, principle and working my tech info.
Nptel transformers video lectures, electrical machines lectures, dc machines video, nptel video lectures, nptel online courses, youtube iit videos nptel courses. Other members of the family are the directcurrent dc motor or generator, the induction motor or generator, and a number of derivatives of all these three. As well see, there are some caveats and subclassifications. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore. When a current carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move. Download electric machine by ashfaq husain electric machines, is intended for third and fourth year ug students and first year pg students of electrical engineeringupdated with latest scientific advancements.
The torquespeed characteristics of dc motors are most compatible with most mechanical loads. The principle of operation of a dc generator is similar to that of the ac generator, which was discussed previously. Different types of electric motors and their applications. This document also examines control principles using hall sensors for both singlephase and threephase. Brushless dc motors bldc are used for a wide variety of application requirements such as varying loads, constant loads and positioning applications in the fields of industrial control, automotive, aviation, automation systems, health care equipments, etc. As explained for dc motors in an earlier lesson, switching the supply across the bldc motor makes the current increase. Mod01 lec34 lecture34electronic control of dc shunt motors. As explained for dc motors in an earlier lesson, switching the supply across the bldc motor makes the current increase linearly, since the back emf, being proportional to speed can be assumed to remain constant. Pdf electric machine by ashfaq husain book free download. This type of dc motor provides great starting torque and has good speed regulation, but torque is limited so they are typically found on low horsepower applications. Types of dc motors dc motor are of 3 types they are 1. Jan 07, 2017 in this lesson well examine motor drives, power electronics devices that vary the speed and torque of a motor under its direction by varying the supplied voltage magnitude and frequency. A controller is embedded into the electric motor to facilitate the process within the lack of a commutator and a slip ring.
Bee1101 1 st and 2 nd semester syallabus modulei 10 hours dc networks. Current is supplied to the rotating armature winding through commutator segments. It doesnt matter whether its the brain freeze ice cream factory or joes garage. Debaprasad kastha, department of electrical engineering, iit kharagpur. Introduction to basic notions on electric power 5 electric current conductor lines of force fig. Nptel video lecture topics for electrical engineering new no. Rotating magnetic field in threephase induction motor. Precession, gyroscopes, effect of precession motion on the stability of moving vehicles such as motor car, motor cycle, aero planes and ships, static and dynamic force analysis of planar mechanisms, friction, clutches, friction clutches, brakes and dynamometers, turning moment diagram and fly wheels, governers, balancing, balancing. Jul 11, 2019 working or operating principle of dc motor july 11, 2019 march 20, 20 by electrical4u the dc motor is of vital importance for the industry today and is equally important for engineers to look into the working principle of dc motor in details that we have discussed in this article. Basic electrical technology nptel online videos, courses. Most of these courses consists 40 videos and 1 hour duration each. Nptel provides courseware in the form of video lectures and web courses.
Basic electrical engineering pdf notes bee pdf notes. The brushless dc motors were first developed for achieving superior performance within a lesser space than brushed dc motors. A direct current dc motor is an electric machine that converts electrical energy to mechanical energy. Dec 07, 2014 dc motor introduction, principle and working introduction. The control characteristics of these motors have resulted to their immense use and hence control of their speed are required. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Please find the full notes on electrical machines and drives. Direct current motors have been used since the early 20 th century and was a dominant among all the other motors available at that time. The product or represents the real permeability of the material, and is thus the analog of electrical conductivity. Dc motors are rarely utilized in normal applications as a result of all electrical supply firms furnish electrical energy but, for special applications like in steel mills, mines and electric traction, its advantageous to convert ac into dc so as to use dc motors. Welcome to the department of mechanical engineering, part of the college of science and engineering, serving the state and nation as a leading center of education, research, and innovation. Draw the simplified speedtime curve for the main line services and show all necessary periods. Dc motor brochure singles tecowestinghouse motor company.
In this lesson well examine motor drives, power electronics devices that vary the speed and torque of a motor under its direction by varying the supplied voltage magnitude and frequency. In this lesson aspects of starting and speed control of d. Lecture 05 dc motors free download as powerpoint presentation. Motors serieswound serieswound brushed dc swdc motors have the field coil in series with the armature. Brushless dc motor fundamentals application note monolithic. Subhajit bose03 shuvankar das02 binoy mourya09 sushobhan sarkar06 prosenjit debnath35 3. Access free d c machines nptel includes fundamentals, motors. Electrical engineering basic electrical technology nptel. Find materials for this course in the pages linked along the left. Electrical engineering electrical machines i nptel. Nptel syllabus advanced electric drives video course course outline the first course on electric drives usually introduces the concept of control of electric motors for various types of mechanical loads.
In other words, when a magnetic field and an electric field interact, a mechanical force is produced. Virtually every factory and shop has one thing in common. Brushed dc motor fundamentals microchip technology. Principle of operation of dc machines, types of dc generators. Conversion to mechanical power by motors pumps, fans, hvac, refrigeration compressors, power tools, food processors, escalators, elevators. Basics of dc motors for electrical engineers beginners. Mod01 lec37 lecture37starting and braking of dc series motors. In the first course, mainly the dc motor control both steady state and dynamic, and steady state torque. A set of lectures about navigating mobile platforms or robots that is an extension of the b4 estimation course covering topics such as linear and nonlinear kalman filtering. Dc motors designed for your application dc motor applications tecowestinghouse motor company dc motors are ideally suited to a multitude of industrial and marine applications in which high torque and variable speed are required. For example, the control of a rotary inverted pendulum requires a dc motor to drive the arm and the pendulum as shown in figure 21. The dc motor or direct current motor works on that principal.
Each commutator segment also located on the rotor is connected to an armature winding coil. A drawback to swdc motors is that they do not have precise speed control like pmdc and shwdc motors have. Mod01 lec36 lecture36characteristics of dc series motors. Working or operating principle of dc motor electrical4u. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. Armature reaction, separately excited and self excited generators, load characteristics of shunt, principle of operation, speed control of d. Therefore speed of the 3 types of dc motors shunt, series and compound can be controlled by changing the quantities on the righthand side of the equation above hence the speed can be varied by changing. The changes are made keeping the original flavor of the book intact, that is, indepth coverage of fundamental concepts.
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