Mod01 lec37 lecture 37starting and braking of dc series motors mod01 lec38 lecture 38speed control and of dc series motors mod01 lec39 lecture 39testing of dc series motors. Dc motor, generators and energy conversion devices lecture. Some notes about ac and dc motors for high power applications. Chapter 1 principles of operation of synchronous machines the synchronous electrical generator also called alternator belongs to the family of electric rotating machines. Tirslk module 12 lecture video part i dc motors physics video. A dc motor is a mechanism that transforms electrical energy to mechanical energy. Mod01 lec40 lecture 40characteristics of compound dc series motors freevideolectures aim to help millions of students across the world acquire knowledge, gain good grades, get jobs. The permanent magnet motor uses a permanent magnet to create field flux. Introduction a series dc motor is a motor whose filed windings consists of a relatively few turns connected in series with the armature circuit. Electrical engineering video lectures from nptel, iit, mit. The course notes are intended to serve as the primary references for this course, and were developed over the years during which the course has been offered.
Dc machine are the electromechanical energy conversion devices which converts either dc power to mechanical power or mechanical power to dc power. 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. This video lecture, part of the series industrial drives. The rotor and stator are each connected from a different power supply, this gives another degree of freedom for controlling the motor over the shunt. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. To find out how to reverse the direction of rotation of a series dc motor. 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.
Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Magnetic circuits quantities and definitions, solving magnetic circuits with electrical analogies, mechanics for motors and generators, electromagnetic induction and magnetic forces, construction of elementary dc generators, induced voltage in practical dc. Video lecture on working principle of a dc motor of chapter dc machine of subject basic electrical engineering for firstyear engineering students. We discuss the construction and working principle of a dc motor. Brushless dc motors page 12 8 determined by the inverter supply to the motor.
Term may also refer to the winding that is on the rotor. Nptel, iit, lectures, courses, video, engineering, online. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control constant slip control fieldoriented control. Whether youre a beginner or an advanced learner looking for refresher courses, youll find them in our informative video series.
Course notes electric machines electrical engineering. These notes has been made by me after watching nptel lectures given by dr. Lets learn the working of an electric motor, which converts electricity into a rotation. Nptel provides elearning through online web and video courses various.
Module 5 dc generators this module describes the types of dc generators and their application in terms of voltage production and load characteristics. Learning objectives identify and define the components of a two pole permanent magnetic dc motor stator, armature, commutator and brushes. Razor scooter wheel motor at first glance, a brushless directcurrent bldc motor might seem more complicated than a permanent magnet brushed dc motor, but the purpose of the following is to emphasize the simple analytical techniques that can be used to understand the operation of a bldc. Gopakumar, does not currently have a detailed description and video lecture title. Using flemings left hand rule, we show you how to determine the direction the winding. This video provides all the important mcq questions from dc motor in detail and also provides some important points to remember for exams and interviews must watch dc motor all other important. 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. Modules may be used by teachers, while students may use the whole package for self instruction or for reference. Sal shows that there will be a net torque on a loop of current in a wire. Introduction in this lecture we consider various forms of rotating electrical machines these. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation.
Subhajit bose03 shuvankar das02 binoy mourya09 sushobhan sarkar06 prosenjit debnath35 3. This video shows the characteristics of a dc motor. Mod01 lec39 lecture 39testing of dc series motors 40. Dc motor introduction, principle and working introduction. Draw the simplified speedtime curve for the main line services and show all necessary periods. Dc generator characteristics and introduction to dc motors dc motors. The notes are organized in chapters, though the chapters may not correspond precisely with the order of the material as discussed in lecture. Dc motors i tutorial of basic electrical technology course by prof l.
Bee basic electric engineering is common to first year branches of ug engineeringexpect bt. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. Must watch it subscribe our electrical engineering related channel electrical academy to get the. Digital communication notes pdf dc lecture notes 4. Experiment 7 series dc motor i objectives to determine the torquespeed characteristic curve. Course home syllabus calendar readings lecture notes lab videos assignments download course materials. Other members of the family are the directcurrent dc motor or generator, the induction motor or generator, and a number. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. Ac induction motors are also the most common motors used in main powered home appliances.
Types of dc motors dc motor are of 3 types they are 1. This is an introductory lab designed to introduce you to the oscilloscope and matlab. Dc motor introduction, principle and working my tech info. Information and entropy, conditional entropy and redundancy, shannon fano coding, mutual information, information loss due to noise, source codings huffman code, variable length coding, source coding to increase average lnfomtation per bit. Motor control rss lecture 3 monday, 7 feb 2011 prof. If the emf in the rotor of an 8 poles induction motor has a frequency of 1. Our free video lectures cover everything from basic electronics to semiconductor technology. Magnetic circuits quantities and definitions, solving magnetic circuits with electrical analogies, mechanics for motors and generators, electromagnetic induction and magnetic forces, construction of elementary dc generators, induced voltage in practical dc machines, power balance and. Electric motors and generators explained using animations, plus stepper motors.
Electric motors and generators introduction a simple ac generator a simple dc generator dc generators or dynamos ac generators or alternators dc motors ac motors universal motors electrical machines a summary chapter 23 introduction. 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. Dc motor, generators and energy conversion devices lecture notes. Using flemings left hand rule, we show you how to determine. The video lectures were generously provided by tim fiegenbaum at north seattle community college. Electrical engineering video lectures tutorials lecture 16 power ports lecture 24 dc machines part 2 lecture 15 power factor lecture 25 dc generators lecture 22 the practical transformer part 3 lecture 18 transformer basic part 2 lecture 27 dc motors lecture 26 dc generators 2 lecture 37 induction motor 2 lecture 20 the. Electrical machines i online course video lectures by. Find materials for this course in the pages linked along the left. A good material for the poles of a pmdc motor should have the apposite of the above. Passive components, sources, krichoffs law, modeling of circuit, analysis using matlab, transfer function and pole zero domain, phasor analysis, the practical transformer, phasor analysis, transformer basics, dc machines, dc generators, dc motors, three phase system, induction motor and synchronous machine.
Some of the slides include animations, which can be seen by viewing the powerpoint file as a slide show. Simple analysis for brushless dc motors case study. You will measure the angular velocity of your homebuilt motor and characterize a dc motor by measuring its motor constant. Its operation is based on the principle that when a current carrying conductor is placed in a. Fundamental in engineering mathematics and physics course objectives. Sal shows that this net torque will cause the loop to rotate.
The threephase induction motor is the extensively used for various kinds of industrial drives. Module 6 dc motors this module describes the types of dc motors and includes discussions of speed control, applications, and load characteristics. Umanand, principal research scientist, power electronics group, cedt, iisc. The induction motor is made up of the stator, or stationary windings, and the rotor. Lecture series on basic electrical technology by prof. In this video, construction of dc machines with all the parts are conceptually explained. Et 332a dc motor, generators and energy conversion devices. Physclips provides multimedia education in introductory physics mechanics at different levels.
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