Pdf modelling of a universal motor with speed control. Pdf automobile engineering lecture notes4 to final year. It differs from conventional dc motor in such that it doesnt contains brushes and the commutation is done using electrically, using a. A commercial universal motor may have a somewhat weaker series field and more armature conductors than a d. The current automotive industry faces numerous challenges, including increased global competition, more stringent environmental and safety requirements, the need for. The wikipedia entry for a universal testing machine utm defines it as. Biological motivation to design intelligent systems and control 2. L umanand department of power electronics group, cedt iisc bangalore. If the motor is stationary and a voltage va is applied, a current ia flows which causes the motor to rotate. Continuous speed control of a universal motor running on dc is very easily accomplished using a. Representation of a motor in terms of an ideal motor. Syllabus of bachelor of technology in electrical engineering 4th semester electrical machinesii. Schrage motor is essentially a combination of wound rotor induction motor and frequency convertor. The ac universal motor drive controls the rotation speed by means of phaseangle partialization.
Engineers in this field can design new vehicles or look for ways to improve existing automotive engineering. Perform an analysis on induction machines which is the most rugged and the most. Induction motor drives with closedloop control are used in similar applications to d. Therefore the universal motor is also known as an ac series motor or an ac commutator motor. Automotive engineering is a combination of mechanical, electrical and materials science. The study of controltheoretic foundations such as stability and robustness in the frame work of intelligent control. Automobile engineering 8th semester mechanical engineering. A brushless dc motor consists of a rotor in form of a permanent magnet and stator in form of polyphase armature windings. General application or uses to transmit power from driver shaft to driven shaft. In this case, the voltage is a function of the firing angle of the triac. Free download engineering ebooks pdf ppt lecture notes.
Schrage motor operation principle and characteristics of. The universal motor is designed for commercial frequencies from 60 cycles down to d. This method consists of changing the rms voltage applied to the motor. Nptel syllabus intelligent systems and control video course course objectives 1. Basic electrical technology basic electrical technology. Electrical motor efficiency is the ratio between shaft output power and electrical input power electrical motor efficiency when shaft output is measured in watt. Furthermore, since linear motion is so often required in machines, leadscrews are fundamentally fantastic machine elements. Lightweight, functional, and novel material authors. The dc motor control experimental setup offers rich possibilities for learning the practical aspects of control systems design and implementation. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy to mechanical energy, and vice versa. The speed is entirely dependent on the load and the supply voltage. Automotive engineering fundamentals sae international. At the end of the lecture, student should be able to. A universal testing machine is used to test the tensile stress and compressive strength of materials.
Electrical machines 3 notes em iii notes this subject is an extension of previous machines courses. Nptel provides elearning through online web and video courses in engineering, science and humanities streams. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. The mission of nptel is to enhance the quality of engineering education in the country by providing free online courseware. Fall 2005 ee595s electric drive systems 3 voltsperhertz control history. It deals with the detailed analysis of synchronous generators and motors which are the prime source of electrical power generation and its utilities. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy. Different types of electric motors and their applications. If the field resistance is increased by 5%, calculate the new steady state armature current and speed of the motor. Massachusetts institute of technology department of electrical engineering and computer science 6. Control systems objective questions and answers pdf free download,mcqs,lab viva,online quiz bits test electrical engineering interview questions. Though these machines are useful for small outputs, they are not used for large powers as.
It is named after the fact that it can perform many standard tensile and compression tests on materials, components, and structures. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. 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. Simple analysis for brushless dc motors case study. Basic electrical technology nptel online videos, courses. This is a special kind of motor and this motor works on single ac supply otherwise dc supply. Unlike induction motor the primary winding of schrage motor is on the rotor. Eee electrical engineering multiple choice questions. In an open loop control system a output is independent of control input b output is dependent on control input. Universal motors are series wound where the field and armature windings are connected in series and thus generates high starting torque.
These motors are generally series wound armature and field winding are in series, and hence produce high starting torque see characteristics of dc motors here. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control constant slip control fieldoriented control. Drives general 4 motor operation with converter supply 6 motor current waveforms 6. These drives are also particularly suited to applications that must operate at very high speeds with a high level of field weakening, for example spindle motors. This article describes what is a coupling, types of couplings, rigid couplings, flexible couplings, universal couplings, hookes coupling, pin bush coupling, flanged coupling etc. Universal motor the universal motor is a rotating machine similar to a dc motor but designed to operate either from dc or singlephase ac. Automotive engineering fundamentals list of chapters preface acknowledgments chapter 1introduction and overview 1. Single phase transformer and applications of single phase transformer. To connect or couple 2 components which are manufactured separately eg. Synchronous motor stepper motor ac servo motor brushless dc servo motor. Universal and ram types bedtype mill planertype mills the largest category tracer profile mill reproduce an irregular part geometry cnc milling. Couplings are used when the shafts are in a straight line and are to be connected end to end to transmit power.
Finally, control aspects of some special motors, such as permanent magnet synchronous motor, brushless dc motor, switched reluctance motor, etc. Types, construction and principle of operation, 3 phase induction motor, general phasor diagram, equivalent circuit, power and torque. It is true that single phase motors are less efficient substitute for 3phase motors but 3phase power is normally. Quanser has a dc motor control kit with a user manual that lists at least 67 experiments1. Three phase supply is given to the primary with the help of 3 slip rings. Special motor control m5l1 universal motor control m5l2 singlephase induction motor control other resources quiz questions quiz 1 section 1. Lecture involves clutch, chasis, springs, shock absorbers, frontback wheel drives, wheels, tyres, battery, dc generatorsregulators of automotive systems for engineering students. A universal motor is a special type of motor which is designed to run on either dc or single phase ac supply. Home tags manufacturing process hajra choudhary pdf download. The speed of a universal motor can be very high, typically in the ra nge of 500020000 rpm 2. Brian cantor, patrick grant, colin johnson publisher. Modelling and simulation of armaturecontrolled direct.
Threephase induction motor, cage and wound slipring rotor, synchronous and rotor speed, slip, induced voltages in stator winding and rotor barwinding. Analysis of learning systems in conjunction with feedback control systems 4. The motor is a permanent magnet type and can be represented in idealized form as in figure 5, where ra is the armature resistance and t1, t2 are the actual motor terminals. The stator and rotor windings of the motor are connected in series through the rotor commutator. That is why, universal motors generally comes built into the device they are meant to drive.
Solution as usual let us begin the solution by drawing the shunt motor. If power output is measured in watt w then efficiency can be expressed as. Introduction to robotics nyu tandon school of engineering. C motor braking lecture 85 introduction to series motor lecture 86 series motor characteristics lecture 87 series motor speed control lecture 88 universal motor lecture 89 swinburne test lecture 90 hopkinson test lecture 91 efficiency calculation lecture 92 field test on d. Pdf design and development of universal motor control. Since majority of modern drives are ac motor drives, the course centers around the control of ac motor drives.
Couplings are mechanical elements that couples two drive elements which enables motion to be transferred from one element to another. Centre for engineering studies recommended for you. Electrical engineering tutorial electric motor control. Single phase induction motors sizes vary from 1400 kw to 125 kw are used in toys, hair dryers, vending machines etc. These motors are mainly designed for operating at highspeed above 3500 rpm. Understand the principle and the nature of single phase and 3 phase induction machines. Nptel video lectures, iit video lectures online, nptel youtube. The aim is to establish relationship between the speed of dc motor and the load torque at different voltages as well as investigating the performance of closedloop systems when different voltages are applied to the. Pdf ac and dc drives play a vital role in each and every industry. Nptel video lecture topics for mechanical engineering new no. Schrage motor can be treated as an inverted poly phase induction motor.