Debaprasad kastha, department of electrical engineering, iit kharagpur. So here that is 24 to 29 we shall discuss the machine dc generator and the dc motor where the basics are to the understanding of all the machines. Nptel 40 videos play all electrical electrical machinesi nptelhrd construction and working of dc motor electrical duration. Gopakumar, does not currently have a detailed description and video lecture title. Dc machines 1 dc machines transformsmechanicalenergyintoelectric energywithdc voltage and current dc generatoror dynamo, or conversely dc motor. Basic electrical technology nptel online videos, courses. Fall 2005 ee595s electric drive systems 3 voltsperhertz control history. Basic electrical technology lecturer nptel videos description notes by prof. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Introduction architecture of industrial automation systems measurement systems characteristics temperature measurement pressure, force and torque sensors motion sensing flow measurement signal conditioning data acquisition systems introduction to automatic control pid controlpid control tuning feedforward control ratio control time delay systems and. Apr 21, 2020 dc machines nptel notes edurev is made by best teachers of. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. The operation of this type of device dc motor is reversible if the load opposes the rotation movement the load is said to be resistive, the device provides a torque and operates as a motor if the load is such that it tends to make the device rotate the load is said to be driving or it opposes the slowdown.
Field control of series motor, motoring and braking of separately excited and series dc motors. Pittman gm9236s025 dc motor powertorque characteristic pittman what info is in this plot. Gopakumar, centre for electronics design and technology, iisc bangalore. This video shows the characteristics of a dc motor. Reluctance machines, induction machines, synchronous machines, stepper motors, and brushless dc motors. Among these, brushless dc motors bldc feature high efficiency and excellent controllability, and are widely used in many applications. A dc motor is a mechanism that transforms electrical energy to mechanical energy. Lecture 16 dc motor speed control introduction youtube. This document is highly rated by students and has been viewed 851 times. Brushes and commutator unlike other electric motor types i. As soon as we supply direct current in the armature, a mechanical force acts on it due to the electromagnetic effect.
Basics of dc motors for electrical engineers beginners on photo. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. A common actuator in control systems is the dc motor. The very basic construction of a dc motor contains a current carrying armature, connected to the supply end through commutator segments and brushes. Motor property 1 torque is proportional to current question. Electrical machines i online course video lectures by iit. Distributed generation technologies, distributed storage technologies, distribution system protection, circuit breaker coordination, symmetrical component analysis and sequence excitation, modeling of distribution system components, protection components, impact of distributed generation of distribution. Brushed dc motors, despite their mechanical complexity, are governed by only a few forces. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. 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. An emf voltage is induced in a conductor if it moves through a magnetic field.
Find materials for this course in the pages linked along the left. Introduction, characteristics, adjustible speed drives 35. Lecture series on industrial automation and control by prof. Working principle of a dc motor an electric motor is an electrical machine which converts electrical energy into mechanical energy. Figure 2 torquespeed curves for a separate field excitation motor. Lecture series on basic electrical technology by prof. Vf speed control of 3 phase induction motor using space. Electrical machinesi nptel online videos, courses iit video. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore. Spring 2006 process dynamics, operations, and control 10. May 19, 2008 lecture series on industrial automation and control by prof.
Perform an analysis on induction machines which is the most rugged and the most. 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. Use sensor for feedback desired speed actual speed test computation motor encoder measurement. Craig 4 in rotational electromechanical devices other than dc machines, torque is produced as a result of one or more magnetic fields which rotate about the air gap of the device. Dec 07, 2014 dc motor introduction, principle and working introduction. There are three main varieties of dc motors, all of which make use of the relations above. Working or operating principle of dc motor electrical4u. When current carrying conductor is placed in a magnetic field it experience a force. Its operation is based on the principle that when a current carrying conductor is placed in a.
Brushed dc motor fundamentals microchip technology. The same dc machine can be used as a motor or generator. In other words, when a magnetic field and an electric field interact, a mechanical force is produced. 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. Up next mod01 lec02 lecture02operating principles and construction of single phase transformers duration. Electrical machinesi nptel online videos, courses iit.
Another name for a coil or loop of wire inductors oppose the change in current. Nptel, online courses and certification, learn for free. Electrical machines i online course video lectures by. Induced voltage opposes applied voltage and limits current. Massachusetts institute of technology department of electrical engineering and computer science 6. Basics of dc motors for electrical engineers beginners. Dc motor introduction, principle and working introduction. Basic electrical technology is the most common subject and heart core subject to electrical engineers. Lecture 6 dc motor speed control lecture 7 system modelling, analogy. We will stick shaft of the dc gear motor which help of the ir sensor to calculate speed of motor. Mod01 lec21 lecture21operating principles of dc machines. It is outer cover of dc motor also called as frame. These notes has been made by me after watching nptel lectures given by dr.
Mukhopadhyay, department of electrical engineering, iit kharagpur. Mod01 lec40 lecture40characteristics of compound dc series motors freevideolectures aim to help millions of students across the world acquire knowledge, gain good grades, get jobs. Nptel industrial automation and control joshua lamorie. Speed control of the dc motor is primarily through the voltage v, either directly or through pulsewidth modulation, but the stator. Speedtorque characteristics dc shunt, pmdc and series motors b. Learn for free, pay a small fee for exam and get a certificate featured news. Nptel video lecture topic list created by linuxpert systems. Speed control of separately excited dc motor using controlled rectifiers. Autoplay when autoplay is enabled, a suggested video will automatically play next. Modeling of dc motor the most common device used as an actuator in mechanical control is the dc motor.
Nptel syllabus industrial drives power electronics. 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. An905 ds00905bpage 2 2010 microchip technology inc. When a current carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move. Advanced electric drives online course video lectures by iit. 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. Nptel video course electrical engineering nonlinear dynamical systems. Electrical engineering electrical machines i nptel. According to the most common industry naming conventions of today, there are three dc motor subtypes. Most of these courses consists 40 videos and 1 hour duration each. 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. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control constant slip control fieldoriented control. Dc machine are the electromechanical energy conversion devices which converts either dc power to mechanical power or mechanical power to dc power. A motor converts supplied electrical energy into mechanical energy.
The armature is placed in between north pole and south pole of a permanent or an electromagnet as shown in the diagram above. 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. If a company wanted to have reliable production, it should stick with known, proven. Therefore, theoretically, construction of a dc motor is same as that of a dc generator. Motor principles, adjustible speed and servo drives 36. Nptel electrical engineering video lecture online study material. 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. Nptel transformers video lectures, electrical machines lectures, dc machines video, nptel video lectures, nptel online courses, youtube iit videos nptel courses.
In general, a dc motor,s stalling torque is equal to its starting torque. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, timevarying energyprocessing electronic systems with fast dynamics. Cascade and feedforward control schemes to have a feedforward controller that adjusts the set point of a feedback controller. Generalized theory and krons primitive machine model modeling of dc machines modeling of induction machine modeling of synchronous machine reference frame theory and per unit system control of induction motor drive scalar control of induction motor principle of vector control and field orientation sensorless control and flux observers direct torque and flux control. A direct current dc motor is an electric machine that converts electrical energy to mechanical energy. 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. Ill click in the diagram and type in dc voltage source, and then select the component from a list. Nptel video lectures, iit video lectures online, nptel youtube lectures. Analysis of single phase full controlled converterfed separately excited dc motor. Nptel, iit, lectures, courses, video, engineering, online. Nov 30, 2010 nptel provides courseware in the form of video lectures and web courses. Mod01 lec23 lecture23generated emf and torque in dc machines. The dc motor or direct current motor works on that principal. Jul 10, 2012 autoplay when autoplay is enabled, a suggested video will automatically play next.
Nov 10, 2014 40 videos play all electrical advanced electric drives nptelhrd 8. The electric equivalent circuit of the armature and the freebody diagram of the rotor are shown in the following figure. Over 30 years ago, ac drives were considered new technology. A force is induced in a conductor that has a current going through it and placed in a magnetic field any dc machine can act either as a generator or.
Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. Understand the principle and the nature of single phase and 3 phase induction machines. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion. Nptel provides elearning through online web and video courses various streams. Dc motor introduction, principle and working my tech info. What is common to all the members of this family is that the basic.
The bldc motor has powersaving advantages relative to other motor types. Your browser does not currently recognize any of the video formats available. Mod01 lec30 lecture30characteristics of dc shunt motors. Permanent magnet synchronous motor drive, brushless dc motor drive, switched reluctance motor drive, stepper motors. This video lecture, part of the series industrial drives. Power electronics is the application of solidstate electronics to the control and conversion of electric power. May 25, 2016 to model our dc motor, the first thing that well need is a dc voltage source. Introduction, dc dc converters, adjustible speed drives 34.
Dc brush motors, dc permanentmagnet pm motors, and dc universal motors. Industrial drives and power electronics online course video. In such a state a clockwise torque will be produced on the rotor. You can also get course completion certification for some of the courses. Mod01 lec39 lecture39testing of dc series motors 40. As shown in figure 3, when a pulley with radius r is attached to the motor and force of f is applied to the pulley,s circumference, the torque generated, tl. To some, motor speed control is somewhat of a mystical science, a science that causes motors and machines to sometimes operate in unexpected ways.
Electrical engineering video lectures from nptel, iit, mit. 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. Brushless dc motors nyu tandon school of engineering. Industrial automation and control online course video. For this example, we will assume that the input of. Nptel provides elearning through online web and video courses various.