...A Review of Induction Motors Pattinson Hayton California State University, Long Beach College of Engineering 12/03/2015 Thus far in Energy Conversion and Principles, the topics of direct current, or DC, and synchronous motors have been covered and discussed. A direct current exists in the field windings of both of these motors and an alternating current, or AC, exists in the armature windings of both of these motors. Electrical power is delivered right to the armature of a DC motor using a commutator, or the moving part of the rotary, in these motors. Because of this, a DC motor with this type of connection can also be referred to as a conduction motor. Conversely, if a motor receives power by induction, rather than by conduction, the motor is called an induction motor. An induction motor is therefore a type of transformer that possesses a rotary secondary winding. As discussed previously, both DC and synchronous motors are doubly-fed. An induction motor, however, is a singly-fed motor. With these motors being singly-fed, the construction of is different than that of other motors. These motors do not require slip-rings, a commutator, or brushes. With these components absent from induction motors, it is thus seen that there are no moving contacts between the stator and rotors, which is obviously quite different than the structure of DC and synchronous motors. Induction motors are useful due to their efficiency. The absence of brushes in induction motors eliminates...
Words: 3796 - Pages: 16
...Speed Control of Induction Motor using Fuzzy Logic Approach A PROJECT THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Bachelor of Technology In Electrical Engineering By Varuneet Varun (Roll 108EE011) G. Bhargavi (Roll 108EE026) Suneet Nayak (Roll 108EE044) Under Supervision of Prof. Kanungo Barada Mohanty Department of Electrical Engineering National Institute of Technology, Rourkela Rourkela- 769008, Odisha © 2011 - 2012 National Institute of Technology Rourkela Certificate This is to certify that the work contained in this thesis, titled “SPEED CONTROL OF INDUCTION MOTOR USING FUZZY LOGIC APPROACH” submitted by Varuneet Varun, G. Bhargavi and Suneet Nayak is an authentic work that has been carried out by them under my supervision and guidance in partial fulfillment for the requirement for the award of Bachelor of Technology Degree in Electrical Engineering at National Institute of Technology, Rourkela. To the best of my knowledge, the matter embodied in the thesis has not been submitted to any other University/ Institute for the award of any Degree or Diploma. Place: Rourkela Date: 11th May, 2012 Dr. Kanungo Barada Mohanty Associate Professor Department of Electrical Engineering National Institute of Technology Rourkela – 769008 i Acknowledgment We are grateful to The Department of Electrical Engineering for giving us the opportunity to carry out this project, which is an integral...
Words: 17434 - Pages: 70
...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...
Words: 3545 - Pages: 15
...Mathematical induction is a method of mathematical proof typically used to establish that a given statement is true for all natural numbers (positive integers). It is done by proving that the first statement in the infinite sequence of statements is true, and then proving that if any one statement in the infinite sequence of statements is true, then so is the next one. The method can be extended to prove statements about more general well-founded structures, such as trees; this generalization, known as structural induction, is used in mathematical logic and computer science. Mathematical induction in this extended sense is closely related to recursion. Mathematical induction should not be misconstrued as a form of inductive reasoning, which is considered non-rigorous in mathematics (see Problem of induction for more information). In fact, mathematical induction is a form of rigorous deductive reasoning.[1] Contents [hide] 1 History 2 Description 3 Axiom of induction 4 Example 5 Variants 5.1 Starting at some other number 5.2 Building on n = 2 5.2.1 Example: product rule for the derivative 5.2.2 Example: Pólya's proof that there is no "horse of a different color" 5.3 Induction on more than one counter 5.4 Infinite descent 6 Complete induction 6.1 Transfinite induction 7 Proof of mathematical induction 8 See also 9 Notes 10 References [edit]History In 370 BC, Plato's Parmenides may have contained an early example of an implicit inductive proof.[2]...
Words: 1021 - Pages: 5
...CHAPTER I The Problem and Its Setting Introduction Cookers can broadly be divided into two types, namely gas cookers and electric cookers. Electric cookers can also however also be sub-divided into three types, namely radiant coil cookers, solid disc cookers and ceramic top cookers. Gas cookers power is easy to adjust and response is instant, thus providing good temperature control. Consumption of gas varies depending on the size of the burners. This type of cooker is the least efficient of all the cookers. The main advantage of a gas cooker is that gas is relatively inexpensive. The main disadvantage is that these types of cookers are the least safe out of all the cookers. Radiant coil cookers are the most common of all the cookers. They are also the cheapest cookers to purchase initially. These types of cookers are heated by electrical resistance. These cookers are more efficient than solid disc cookers and ceramic top cookers. Solid disc cookers are similar to radiant coil cookers. They are just solid and fixed to the cooker. They do not need to be removed for cleaning. These elements have a greater thermal mass than radiant coil elements and are thus less efficient and have a slower response time. Ceramic top cookers have their elements below heat resistant ceramic glass. This improves appearance and improves cleaning. These types of cookers take longer to heat up than radiant coil and solid disc cookers. Their response is also slower than the above-mentioned cookers...
Words: 2343 - Pages: 10
...(Electronics) Sementer: 5th TOPIC OF THE PROJECT: Wireless energy transfer OBJECTIVE : The main objective of our project is to transfer energy using Electrodynamics induction OR Resonant inductive coupling. Measure output current and voltage across L2 COIL. Working of wireless led lamp on electrodynamics induction. Mobile charger on the principle of electrodynamics induction. METHODOLOGY TO BE USED: Power source transmitting coil receiving coil Ac to Dc converter output Following are the ways which help in incorporating of project: The design of the project is to take energy from the power source and transfer it wirelessly to receiving coil. Hence ac power source resonant inductive is IN PROCES. Induction coil or magnetic coil or tesla coil ARRANGED of proper thickness and amount. Output Ac to Dc converter circuit studied IS COMPLETED. Circuit component with data sheet IS PURCHASED. Coil L1 transmitting coil and coil L2 receiving coil no. of turn study IN PROCESS Input frequency, output exact current and voltage value study The frequencies can be matches by both the transmitting and receiving coils, allowing them to communicate together much more efficiently IN PROCESS. The device operated on output value of coil L2 STUDY IS IN PROCESS. Following component needed:- 1. Induction coil or magnetic coil 2. Capacitor (various value ceramic) 3. Resistance 4. Diode 1n4148 , 4007 5. Voltage regulator 6. Oscilloscope 7. Transistor 2N222A 8. Inductor(various...
Words: 827 - Pages: 4
...Journal of Data Science 2(2004), 231-244 Estimating Vehicle Speed from Traffic Count and Occupancy Data Martin L. Hazelton University of Western Australia Abstract: Automatic vehicle detectors are now common on road systems across the world. Many of these detectors are based on single inductive loops, from which data on traffic volumes (i.e. vehicle counts) and occupancy (i.e. proportion of time during which the loop is occupied) are available for 20 or 30 second observational periods. However, for the purposes of traffic management it is frequently useful to have data on (mean) vehicle speeds, but this is not directly available from single loop detectors. While detector occupancy is related in a simple fashion to vehicle speed and length, the latter variable is not measured on the vehicles that pass. In this paper a new method for speed estimation from traffic count and occupancy data is proposed. By assuming a simple random walk model for successive vehicle speeds an MCMC approach to speed estimation can be applied, in which missing vehicle lengths are sampled from an exogenous data set. Unlike earlier estimation methods, measurement error in occupancy data is explicitly modelled. The proposed methodology is applied to traffic flow data from Interstate 5 near Seattle, during a weekday morning. The efficacy of the estimation scheme is examined by comparing the estimates with independently collected vehicle speed data. The results are encouraging. Key words: Bayesian inference, inductance...
Words: 4518 - Pages: 19
...Induction and mentoring programs are a structured form of support for beginning educators. The two programs are linked together and complement each other for the security of lowering the attrition rate in beginning teachers. These two programs are offered to new teachers for a combination of support, new development and opportunities. Mentoring and induction programs are very similar, but their differences set them apart and each one can offer knowledge and experience for every new teacher. More and more school systems are creating quality induction and mentoring programs for new teachers with great success and this process is invaluable. Across the country the need for more quality teachers has been recognized and the support from successful induction and mentoring programs can make that need a reality. The New Teacher Center reports working with “teachers, administrators, universities, and other educational organizations to build induction and mentoring programs not only designed to support new teachers, but to have a lasting impact on classroom practices and the school communities.”(NTC, 2009) For an induction and mentoring program to have longevity, strategy and constant feedback are two vital components. When an induction and mentoring program are successful, teachers can easily integrate into the culture of the school full of confidence to respond to their own induction and mentoring plans. How does a mentoring program differ from an induction program? The induction...
Words: 1029 - Pages: 5
...1) First hole is played by the golfer Assuming the golfer plays Kth hole. Since he played the kth hole he must also play the k+1th (given) =>Therefore the golfer will play all the holes 2) a) P(1) is the statement 1^3 = ((1(1 + 1)/2)^2 b) Both sides of eqn evaluate to 1. c) Induction hypothesis is P(k) for positive integer k the statement 1^3+ 2^3+· · ·+k^3 = (k(k+ 1)/2)^2 d) Lets assume P(k) holds, we have to show that P(k + 1) is true, we have to derive equation 1^3+2^3+· · ·+k^3+(k+1)^3 = ((k + 1)(k + 2)/2)^2 e) Add (k + 1) ^3 to LHS and RHS of equation in induction hypothesis. Showing that LHS in d) is equal to (k(k + 1)/2) ^2 + (k + 1) ^3. We find this equals ((k + 1)(k + 2)/2)^2. Therefore LHS = RHS f) We did the basis step and the inductive step. Principle of mathematical induction now proves that P(n) is true for all positive integers n. 3) 4) Base Case(s): Notice that we can form 18 cents of postage using 6 3-cent stamps. We can form 19 cents of postage using 1 10-cent stamp and 3 3-cent stamps. We can form 20 cents of postage using2 10-cent stamps. Induction Step: Assume we form any postage i with 18 ≤ i ≤ n, with n ≥ 20.Consider forming n + 1 cents of postage. By strong induction hypothesis, since n ≥ 20, n − 2 ≥ 18, we then have n − 2 cents of postage. Adding single three cent stamp then gives n + 1 cents of postage. Hence proved 5) The assumption in the inductive step is that there always is minimum 1 3-cent stamp or minimum 2 4-cent stamps. Proof is also flawed since...
Words: 351 - Pages: 2
...Induction – Magnet through a Coil Activity P30 Purpose: Electromotive forces can be induced in a coil by changing the magnitude of the magnetic field within the coil, changing the area of the coil, or changing the angle between the magnetic field and the area of the coil. This lab used the first method of changing the magnitude of the magnetic field by dropping a magnet through a coil in order to induce an electromotive force. The EMF was measured as the magnet fell. The integral of EMF versus time gives the magnetic flux according to Faraday’s Law of induction. Faraday’s law of induction essential states that EMF is equal to the rate of change of magnetic flux. Some aspects of Lenz’s law were also investigated. Lenz’s law states that the direction of the current in a coil moves in the direction that causes a magnetic field that opposes the change in the magnetic field of the magnet. Procedure and Materials: The computer was set up by connecting the Voltage Sensor and the interface. A new activity was opened in Data Studio with a graph of Voltage versus Time. Automatic recording was set to begin recording once 0.05 volts was reached and stop at 0.4 seconds of elapsed time. The alligator clips were connected to the circuit board springs next to the induction coil. Data was recorded for three variations of the experiment. First, a single bar magnet was dropped through the coil starting with the south end approximately 2 cm above the coil. Then two magnets were dropped with...
Words: 913 - Pages: 4
... Skeptic: Clayton Spiceland_______________________________________ Researcher Jay Patel______________________________________________ TA Alec Sim_____________________________________________ Role | I | DC | AD | RC | Q1 | Q2 | PI | PG | | | | | | | | | | | | | | | | | | | | | | | | | | | | I introduction DC data and calculation AD analysis and discussion RC results and conclusion Q1/Q2 quiz/prelab PI principal investigator points PG personal grade Introduction: The purpose of the lab is to study the effects due to magnetic fields in motion and also to determine the qualitative features of electromagnetic induction. Procedure: 1. For the Part 1 of the lab, a solenoid was connected to a galvanometer, as shown in the data and calculations. First, the North pole was inserted into the coil, then in the opposite direction, with the South Pole first. Then, the magnitude and sign of the deflection on the galvanometer was recorded in μAmps. Also, an exact sketch is made of the solenoid, the direction of the velocity, the induced magnetic field, the induced current and the magnetic polarity of the solenoid induced in provided in the data and calculations portion of the report. 2. The magnet was inserted again following step 1, but with a faster speed and everything sketched again. Then, The South pole was inserted first and step 1 followed again...
Words: 1942 - Pages: 8
...INVESTIGATORY RESEARCH / PROJECT Dealing with MULTIPLE GENERATOR ______________________________________________________________ In partial fulfilment of the subject requirement In Science & Technology IV, PHYSICS Submitted by: Agra anjeanette clarice a. Santos april E. Submitted to: MS.CHRISTINE DIAZ Physics Teacher / IR / IP Adviser 06 January 2014 Monday CHAPTER I – Preliminaries Abstract The purpose of this project is to determine the types of generator there are two parts of generator its either mechanical or electrical terms. Multiple generators provide power for expensive change over device. in some event that a utility powers supply fails or loss it automatically places . the generators in an emergency power mode. Generator are useful in application such as mini hydro power plants, wind turbines or in reducing high pressure gas streams to lower pressure reducing high pressure gas because they can recover energy with simple controls. The purpose of this investigation is to determine how to operate a generator and to provide the practical tools needed to model an implement new technique for generating energy through isolated or grid connected system and to demonstrate it. T plan to make a sample of a multiple generator out of the 10 materials given to me. At first I prepared a square wooden boards put the old cd then apply glue after that put the strong magnet in 90% and...
Words: 1645 - Pages: 7
...LivePhoto Physics Activity 32 Name: Date: Exploring Faraday’s Law In 1820 Hans Christian Oersted observed that electric currents create magnetic fields. Consequently many scientists made unsuccessful attempts to create current in the presence of magnetic fields. After over 10 years of investigation Michael Faraday and Joseph Henry, working independently on different sides of the Atlantic, made the discovery that if a conducting coil has a changing magnetic flux passing through it an electromotive force is created that causes a current to flow through the coil. The equation describing this phenomenon quantitatively is known as Faraday’s Law. a b c In this activity you will be asked to use Faraday’s Law to explain why the current induced in a coil and thus the voltage across it changes the way it does when the north or south pole of rod shaped magnet is moved into and then back out of the center of a coil of wire at various speeds. No calculations are required in this activity, just thinking! Figure 1: The north pole of a cylindrical magnet is: (a) moving into the center of a coil of wire; (b) reversing direction; and then (c) moving out of the coil. The coil’s voltage vs. time is recorded with a computer interfaced voltage probe. Theoretical Review: According to Faraday’s Law, at any moment the induced emf (denoted ) across a conducting loop with N turns is equal to –N times the rate of change of the magnetic flux passing through the area enclosed...
Words: 1667 - Pages: 7
...Induced Currents Introduction: In this lab we will reverse the situation. That is we will create an electric field from a changing magnetic field. We will be able to detect this electric field by measuring the induced EMF. Equipment Required: • Windows PC • LabPro • Logger Pro • Voltage Probe • Spool of wire • Bar Magnet • Plastic pipe Theory: Faraday’s law of Induction for the induced emf can be written as: emf = −N ΔΦB Δt Where N is the number of turns of a wire loop, which is multiplied by the time rate of change of the magnetic flux. In this experiment, you will make a changing magnetic field by dropping a magnet through a coil of wire. The motion of the magnet will provide the changing magnetic field, which will induce an emf and hence a current in a coil of wire. You will detect that emf with the voltage probe. Setup: 1 2 3 Connect the power cord to the LabPro and connect it to a computer using the USB cable. Be sure to press the ends in firmly. Connect the voltage probe to the LabPro CH1 port. About 40 cm from the end of the plastic pipe wrap at approximately 3 m of wire around the tube, keeping the coils to a narrow band no more than 2 cm across. Be sure to count the number of coils. Use a piece of tape to hold them in place. Leave about 5 cm of wire from each end free. 4 Remove approximately 2 cm of insulation from the ends of the wires, and connect them to the clip leads of the voltage probe. 5 Hold the tube vertically so that you can drop...
Words: 566 - Pages: 3
...Magnetic Induction Lab Complete the lab below. Background – Electricity is vital to our everyday life in the modern in the industrial world. Most electricity is generated by using magnets. Today we will look at what a magnetic field needs to do to create electricity. Learning Goals – The students will: * Develop an understanding of how electricity can be generated using a magnetic field * Develop an understanding of how varying conditions influence the amount of electricity generated. These conditions include: * The number of coils * The area of the coils * The speed of the magnet * The polarity of the magnet * The strength of the magnetic field Procedure – do the following activity using this web site http://www.colorado.edu/physics/phet/simulations/faraday/faraday.jnlp 1. Getting started. Open the website listed above and on the top of the screen select the tab marked Pickup Coil. 2. Make observations & draw conclusions. Add a field meter to the default screen and drag that field meter so it measures the magnetic field in the middle of the pickup coil. Your screen should look something like what you see to the right, on Screen 1. When the light bulb lights up it indicates the electricity has been generated. Grab the magnet and move it around and observe what happens to the strength of the magnetic field and to the light bulb. Based on your observations what conditions must happen for electricity to be...
Words: 537 - Pages: 3
