...Background AC induction motors are being applied today to a wider range of applications requiring variable speed as they are the leading elements to convert electrical energy into mechanical energy. They are being used as actuators in various industrial processes, robotics, house hold appliances (generally single phase induction motor) and other similar applications. The reason for its day by day increasing popularity can be primarily attributed to its robust construction, simplicity in design and cost effectiveness. Also, induction motors are proved to be more reliable than DC motor. Generally, variable speed drives for induction motor requires wide operating range of speed and fast torque response, regardless of the load variations. Also, the conventional controllers have to linearize the non-linear system of induction motor in order to calculate the parameters, which is almost impossible to obtain a perfect non-linear model. Hence the values of the parameters that are obtained from it are thereby approximate. This leads us to more advanced control methods to meet the real demand. To overcome the complexities of conventional controllers, fuzzy logic controller have been implemented in many motor applications. A Fuzzy Logic Controller (FLC) is incorporated for combination with Phase Locked Loop (PLL) for precise and robust speed of induction motor. The fuzzy logic controller is used to pull the motor speed into the locking range of PLL. When the speed error is between...
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...The single-phase induction motor can successfully be driven from a variable frequency power supply. Hence, the motor speed can be easily adjusted. The torque performance of the capacitor- connected motors can be enhanced at low frequency range by altering the V/f control law such that the internal power dissipation in the motor is held constant. VFD control provides efficient speed control the speed is controlled by varying the frequency not the stator voltage. The power factor is improved and the harmonic distortions were less. The simulation of a Modified SEPIC PFC converter fed induction motor drive is done using MATLAB. MATLAB is a high performance language for technical computing. It integrates computation, visualization and programming...
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...three-phase induction machine is the most widely used rotating machines. An induction machine offers an almost constant speed within its normal operating range when operated off a constant-voltage, constant-frequency, and electric power source. Economically, the cost of purchasing these machines can be considered very low, and they require little maintenance. However, controlling the speed of this type of machine is difficult and can be considered very expensive. In this paper, several topics related to the squirrel cage rotor, working principles, speed control, as well as simple examples will be discussed. Squirrel Cage Rotor Construction: Squirrel cage rotor is considered as an example of a...
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...the filling process which includes induction motor, encoder and high speed counter. The encoder produces the pulses by counting the rpm of the induction motor and gives its signal to the high speed counter and the high speed counter counts the pulses and compares it with the reference pulses and when the reference pulses and the counter pulses matched...
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...INTRODUCTION This designation presents a universal picture of induction motors and their function in AC drive systems. Induction motors, specially those of the squirrel-cage type, are the most usual sources of mechanical force in the diligence. The main purpose that we use induction motors are they have a high power/weight ratio compared to DC motors and supplied from a three-phase AC line, induction motors are simple, full-bodied, and inexpensive, in contrast the main disadvantage is most motors operate with a fixed frequency resulting in an almost constant speed, adjustable-speed drives are increasingly introduced into a diversity of applications. Such a cause must include a power electronic converter to control the magnitude and frequency...
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...Linear Induction Motor 2 2.2 Double layer Winding 2.3 Electro-magnetic Bearings 6 3 Work Progress 9 4 Results References 1.0 INTRODUCTION The main idea behind this project is to understand the designing and operation of a Linear Levitating Machine and be able to create a successful prototype using the knowledge that we have acquired. Through this project we want to design and develop a machine which is capable of moving with the help of electromagnetic forces produced by the poles made by the stator windings and is lifted up due to the force generated by electromagnetic bearings. A single sided LIM (linear induction motor), with a short primary on the moving structure and a secondary of aluminium with back iron is being used in our project. An Electromagnetic Bearing is a bearing which is used to support a load without any physical contact. Since they are non-contact bearings, the friction losses are eliminated. Furthermore it avoids wear and tear which is normally associated with ball bearings. The operating speed is also improved. Since it is an active system, the bearings can control the levitation of the machine dynamically while it is in operation. 2.0 LITERATURE SURVEY 2.1 Linear Induction Motor – Linear Induction Motor is similar to a rotary poly phase induction motor where the air gap magnetic field in a poly phase LIM is a traveling magnetic field. The air gap field of an LIM, unlike that of a poly phase rotary induction motor...
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...Arab Academy for Science, Technology and Maritime Transport College of Engineering and Technology Department: Electrical and Computer Control Engineering B. Sc. Final Year Project WIND ENERGY Presented By: Ahmed Magdy Ahmed Mokhtar Latifa Ahmed Supervised By: Dr.Amr Magdy DECLARATION I hereby certify that this material, which I now submit for assessment on the programme of study leading to the award of Bachelor of Science in (insert title of degree for which registered) is entirely my own work, that I have exercised reasonable care to ensure that the work is original, and does not to the best of my knowledge breach any law of copyright, and has not been taken from the work of others save and to the extent that such work has been cited and acknowledged within the text of my work. Signed: _____________________________ Registration No.: ___________ Date: 6/7/2013 2 ACKNOWLEDGMENT To my honourable Dr.AMR MAGDY We were honoured and pleased at the same time to work under the supervision of you, you spent a lot of time with us, at the time you definitely had lots of other important occupations. This work would have never been done without your assistance.Very thanking prof.Dr. Yasser Galal on his effort with us the past five years.Thanking engineers Noha Magdy and Ashraf Brdwyli to help us in the project. 3 ABSTRACT Wind energy is fast becoming the most preferable alternative to conventional sources of electric power. wind turbines...
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...Table of Contents Section 1 – Motor and Load Basics.................................................................................................... 9 AC Motors........................................................................................................................................... 11 NEMA Design Types........................................................................................................................ 12 Motor Synchronous Speed............................................................................................................... 12 3-Phase Motor Connections - NEMA ............................................................................................... 13 Rotor Inertia – NEMA....................................................................................................................... 16 3-Phase Motor Connections – IEC Nomenclature............................................................................ 17 Rotor Inertia – IEC ........................................................................................................................... 18 AC Motor Operation above Base Speed .......................................................................................... 19 Synchronous Motors ........................................................................................................................ 20 Wound Rotor........................................................................................
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... 1-8-14 Single Phase AC Motors Single phase AC motors are a type of motor that is what the name implies which is one phase. In a single phase AC motors, a single phase motor has voltage and it splits into two phase currents to create a rotating magnetic field to generate the rotor. There are four different types of single phase AC motors and they are called split phase, capacitor, shaded pole, and repulsion. Capacitor and shaded pole is the most common motors they have. A capacitor run motor is connected between a main and auxiliary winding to create a phase shift in between the windings and a rotating flux. Split phase has main and auxiliary winding a centrifugal switch open and remove the auxiliary winding. It reverses at low speed, relatively cheap cost, and it has rapid acceleration. A single coil of a single phase motor doesn’t produce a rotating magnetic field, but a pulsating field could reach maximum intensity at 0 degrees and 180 degrees electrical. A single phase current and can produce two counter rotating magnetic field phases. Permanent-split capacitor motor have one way to solve a single phase problem is to build a 2- phase motor. It requires a motor with 2 windings spaces away 90 degrees electrical and displace two phases of current with 90 degrees in time. Permanent – split capacitor motor has increased current magnitude and also has a backwards time shift as the motor generates the speed pace. The motor works well up to ¼ horsepower which...
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...Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are used in industries such as Appliances, Automotive, Aerospace, Consumer, Medical, Industrial Automation Equipment and Instrumentation. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. BLDC motors have many advantages over brushed DC motors and induction motors. A few of these are: • Better speed versus torque characteristics • High dynamic response • High efficiency • Long operating life • Noiseless operation • Higher speed ranges In addition, the ratio of torque delivered to the size of the motor is higher, making it useful in...
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...DESIGN OF FUZZY PID CONTROLLER FOR SPEED CONTROL OF BLDC MOTOR PHASE I REPORT Submitted by ARJUN M Register No. 710012428003 in partial fulfilment for the award of the degree of MASTER OF ENGINEERING in CONTROL AND INSTRUMENTATION DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ANNA UNIVERSITY REGIONAL CENTRE, COIMBATORE COIMBATORE-641 047 DECEMBER 2013 ii ANNA UNIVERSITY REGIONAL CENTRE, COIMBATORE COIMBATORE-641 047 DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING PROJECT WORK PHASE I DECEMBER 2013 This is to certify that the project entitled DESIGN OF FUZZY PID CONTROLLER FOR SPEED CONTROL OF BLDC MOTOR is the bonafide record of project work done by ARJUN M Register No: - 710012428003 Of M.E. (CONTROL AND INSTRUMENTATION) during the year 2013-2014 Head of the Department Dr.S.N.DEEPA, M.E., Ph.D., Project Guide Mr.P.HARI KRISHNAN, M.E., Submitted for the Project Viva-Voce examination held on Internal Examiner External Examiner iii DECLARATION I affirm that the project titled DESIGN OF FUZZY PID CONTROLLER FOR SPEED CONTROL OF BLDC MOTOR being submitted in partial fulfilment for the award of Master of Engineering (M.E.) in Control and Instrumentation is the original work carried out by me. It has not formed the part of any other project work submitted for award of any degree or diploma, either in this or any other University. Signature of the Candidate ARJUN M Register No.710012428003 ...
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...Design of Five Phase Induction Motor Sanket M. Bhimgade#1 Swapnil C. Chaudhari#2 Roshan B. Durge#3 Vabeihrohnei Chozah#4 Parag P. Salunke#5 Department of Electrical Engineering Dr. Babasaheb Ambedkar Technological University, Lonere, Raigad (MS - 402 103) sanketbhimgade@gmail.com , 2swapnil.28492@gmail.com , 3roshan.durge16@gmail.com , 4pawhrohnei@gmail.com , 1 Abstract: The conversion of electrical energy into mechanical energy has been and continuous to be a dominant form of power transmission for industrial purposes. The alternating current (AC) electric induction motor has been an industry workhouse for electromechanical conversion for over 100 years. This paper introduces the fundamental electric and mechanical principles of 5 phase AC induction motor. In this paper, a generalized formula is proposed for the selection of number of slots required for 5-phase alternative current (AC) machine design and the criterion for selecting the starting points of each phases. Keywords: Induction motor. Five phase, Stator winding. current. The power per phase is P = VP IP cosϕ and the total power is the sum of the amount of power in each phase. If the currents are equal and the phase angles are the same as in Fig. 1, then the load on the system is balanced, the current in the neutral is zero and the total power is [1], =3 cos ∅ Or Or = √3 = 1.73 cos ∅ cos ∅ I. INTRODUCTION In general, the induction machines having three-phase windings...
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...thermal stability of new motor technology raises spindle productivity and machining quality 3 Conventional motor technology suffers from major drawbacks 3 Benefits of synchronous spindles 4 Thinking out of the box and engineering bespoke solutions can pay beyond expectations 8 Innovation as a powerful mean of differentiation 9 An unprecedented recession Since the downturn in 2008, the machine tools industry, like many other manufacturing industries, has suffered from an unprecedented crisis which has shaken the strongest companies, not only in Europe and the USA but also Asia. Machine tools OEMs (Original Equipment Manufacturers) saw their sales plummet by up to 65% in the wake of the decline of their customer markets, such as automobile manufacturing. The crisis, made worse by the decline in lending, effectively stopped all capital investment over the last couple of years. With such low turnovers, none of the classical cost reduction measures like short time working, inventory reduction and efficiency measures was enough to avoid negative earnings. In contrast, the traditional industry challenges of improved machining quality, reduced machine costs and improved end user operating costs still demand addressing. In such a challenging environment, the panacea could come from innovative solutions devised and developed by ever more creative companies. This paper presents some of those innovations. Improved thermal stability of new motor technology raises spindle...
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...presented in this paper will be of immense benefit to practicing engineers especially in areas of machine design, maintenance, and protection. (Keywords: electrical machines, operation design, maintenance, protection, stator) the stator and alternating currents are induced in the rotor by transformer action. In the synchronous machine, direct current is supplied to the rotor and Alternating Current (A.C.) flows in the stator. On the other hand, a D.C. machine is a machine that is excited from D.C. sources only or that itself acts as a source of D.C. [5]. It is a common practice in industry to employ A.C. motors whenever they are inherently suitable or can be given appropriate characteristics by means of power electronics devices. Yet, the increasing complexity of industrial processes demands greater flexibility from electrical machines in terms of special characteristics and speed control. It is in this field that the D.C. machines, fed from the A.C. supply through rectifiers, are making their mark. In this paper, we shall discuss the various types of electric machines,...
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...systems. Fourier series representation of continuous periodic signals; sampling theorem; Fourier, Laplace and Z transforms. Electrical Machines: Single phase transformer - equivalent circuit, phasor diagram, tests, regulation and efficiency; three phase transformers - connections, parallel operation; auto-transformer; energy conversion principles. DC machines - types, windings, generator characteristics, armature reaction and commutation, starting and speed control of motors; three phase induction motors - principles, types, performance characteristics, starting and speed control; single phase induction motors; synchronous machines - performance, regulation and parallel operation of generators, motor starting, characteristics and applications; servo and stepper motors. Power Systems: Basic power generation concepts; transmission line models and performance; cable performance, insulation; corona and radio interference; distribution systems; per-unit quantities; bus impedance and admittance matrices; load flow; voltage control. Power factor correction; economic operation; symmetrical components; fault analysis; principles of over-current, differential and distance protection; solid state relays and digital...
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