Nptel transformers video lectures, electrical machines lectures, dc machines video, nptel video lectures, nptel online courses, youtube iit videos nptel courses. Analysis of single phase full controlled converterfed separately excited dc motor. Your browser does not currently recognize any of the video formats available. These motors are ideally suited for hightorque applications because the current in both the stator and armature increases under load. The dc can be considered a particular case of the general ac, with frequency equal to zero. Lecture 16 dc motor speed control introduction youtube. 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. Mod01 lec01 introduction to dcdc converter youtube. 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. As well see, there are some caveats and subclassifications. Working or operating principle of dc motor electrical4u.
Dc motor introduction, principle and working introduction. 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. A direct current dc motor is an electric machine that converts electrical energy to mechanical energy. The dc motor or direct current motor works on that principal. Nptel, iit electrical engineering video lectures, courses, classes, tutorials, training iit video courses and video lectures. 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. Dc brush motors, dc permanentmagnet pm motors, and dc universal 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. Dc motor principle a machine that converts dc power into. According to the most common industry naming conventions of today, there are three dc motor subtypes.
Dc motor brochure singles tecowestinghouse motor company. Field control of series motor, motoring and braking of separately excited and series dc motors. Mukhopadhyay, department of electrical engineering, iit kharagpur. Mod01 lec39 lecture39testing of dc series motors 40. Electrical machines for mechatronics laboratory 7 4 speed control of series dc motors unlike with the shunt dc motor, there is only one efficient way to change the speed a series dc motor. Speedtorque characteristics dc shunt, pmdc and series motors b. According to the most common industry naming conventions of today, there are three dc motor. An intro to the four types of dc motors motion control blog. It is outer cover of dc motor also called as frame. Nptel electrical engineering video lecture online study. Shuntwound dc motors serieswound serieswound brushed dc swdc motors have the field coil in series with the armature. Ramanarayanan,department of electrical engineering,iisc bangalore.
Its operation is based on the principle that when a current carrying conductor is placed in a. Electrical machines i online course video lectures by. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. This section gives a very brief introduction to the most prevalent electrical actuators. They get the armature of the motor spinning with just a battery, a few wires, and a permanent magnet. Virtually every factory and shop has one thing in common. Advanced electric drives online course video lectures by. This video lecture, part of the series industrial drives.
Brushed dc motors are widely used in applications ranging from toys to pushbutton adjustable car seats. Mod01 lec30 lecture30characteristics of dc shunt motors. Shwdc motors are typically used in applications that require five or more horsepower. Electrical engineering basic electrical technology nptel. 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. Speed control of separately excited dc motor using controlled rectifiers. 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. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Basics of dc motors for electrical engineers beginners on photo. Dec 07, 2014 dc motor introduction, principle and working introduction. Electrical engineering video lectures from nptel, iit, mit. 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. Nptel syllabus industrial drives power electronics. These applications include ship propulsion, mine hoists and steel rolling mills.
Watch physicists becky thompsonflagg and ted hodapp trade quips as they show how to take apart a small dc motor and find out how it works. Lecture series on industrial automation and control by prof. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. Gopakumar, centre for electronics design and technology, iisc bangalore. First, a look at an incredibly simpli ed motor, a square loop in a magnetic eld, as shown in figure 1. The dc motor is the simplest of the motors discussed here. Motors serieswound serieswound brushed dc swdc motors have the field coil in series with the armature. Dc motor theory mem 639 realtime microcomputer control 1. These courses are based on the curriculum of iits and iisc provided under nptel. Find materials for this course in the pages linked along the left.
There are two terminals, and when you apply direct current to one terminal and ground the other, the motor spins in one direction. Nptel provides elearning through online web and video courses various streams. 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. Dc motors are rarely utilized in normal applications as a result of all electrical supply firms furnish electrical energy but. Watch physicists becky thompsonflagg and ted hodapp trade quips as they show how to take apart a small dc. Brushed dc bdc motors are inexpensive, easy to drive, and are readily available in all. Electrical engineering industrial drives power electronics 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. When a current carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move. An ev with two input sources 1 joint initiative of iits and iisc funded by mhrd page 41 of 55 nptel electrical engineering introduction to hybrid and electric vehicles. This video shows the characteristics of a dc motor. Working principle of a dc motor an electric motor is. The frequency of an alternated circuit is measured by the number of times the currents andor voltages change direction polarity in a unit of time. 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.
Electrical machinesi nptel online videos, courses iit. Brushed dc motors, despite their mechanical complexity, are governed by only a few forces. Apr 01, 2008 lecture series on basic electrical technology by prof. Mod01 lec34 lecture34electronic control of dc shunt motors. The same dc machine can be used as a motor or generator. Nptel electrical engineering video lecture online study material. The permanent magnet motor uses a permanent magnet to create field flux. A dc motor is a mechanism that transforms electrical energy to mechanical energy. Debaprasad kastha, department of electrical engineering, iit kharagpur. Mod01 lec21 lecture21operating principles of dc machines.
Brushed dc motor fundamentals microchip technology. The very basic construction of a dc motor contains a current carrying armature, connected to the supply end through commutator segments and brushes. This type of dc motor provides great starting torque. Gopakumar, does not currently have a detailed description and video lecture title. Mod01 lec22 lecture22constructional features of dc machines. Nptel syllabus industrial drives power electronics video course 1. Electrical machines for mechatronics laboratory 7 4 speed control of series dc motors unlike with the shunt dc motor, there is only one efficient way. Electrical engineering electrical machines i nptel. Loss of magnetism is not an issue in shwdc motors so they are generally more robust than pmdc motors. 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. May 19, 2008 lecture series on industrial automation and control by prof. Brushless dc motors page 12 8 determined by the inverter supply to the motor.
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. Electrical machines i online course video lectures by iit. When current carrying conductor is placed in a magnetic field it experience a force. Basics of dc motors for electrical engineers beginners. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore.
Nptel electrical engineering electrical machines i. Therefore, theoretically, construction of a dc motor is same as that of a dc generator. Nptel provides elearning through online web and video courses various. Dc motor introduction, principle and working my tech info. Basic electrical technology nptel online videos, courses. A drawback to swdc motors is that they do not have precise speed control like pmdc and shwdc motors have. In other words, when a magnetic field and an electric field interact, a mechanical force is produced. That method is to change the terminal voltage of the motor. Nptel video lectures, iit video lectures online, nptel youtube lectures. Comparison of conventional and brushless dc motors although it is said that brushless dc motors and conventional dc motors are similar in their static characteristics, they. It doesnt matter whether its the brain freeze ice cream factory or joes garage.
The frequency of an alternated circuit is measured by the number of. The experiment in this video is the same one described in the dc motor annotated activity handout. Lecture series on basic electrical technology by prof. It provides protection to the rotating and other part of the. An electric motor is an electrical machine which converts electrical energy into mechanical energy. Advanced electric drives online course video lectures by iit.