...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...
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...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...
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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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...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]...
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...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...
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...(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...
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...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...
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...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...
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...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...
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...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...
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...be found in the movie. What’s more, the lighting in this film is high-key lighting which connotes the meaning of happiness and serenity. Moreover, the mode of address in this film is indirect to the audience which was used the third person angle to encode the meaning to the audience. On the other hand, I choose this movie because of few reasons. Firstly, I love the main character- Zac Efron very much. He has acted in many teenage romance films before, for instance, High School Musical 1, 2 and3. After I watched the High School Musical, I admire his out-looking and his acting skills. Therefore, I choose this film. Besides, the narrative of this movie is very special, which is a non-linear structure and always include some flashback scenes. Firstly, I am going to analyzing the narrative structure of this text. As Todorov mentioned; narrative structure can be divided into 5 parts, which are equilibrium, disequilibrium conflict, recognition of disequilibrium, attempt to...
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...October 31, 2012 Point of View The short story, The Lady with the Pet Dog, written by Anton Chekhov is narrated in the omniscient, third person style. “From this point of view, the narrator can move from place to place and pass back and forth through time” (136). Also, “this narrator can report the characters’ thoughts and feelings aw well as what they say and do” (136). The all knowing speaker of this story tells us, the readers, all about the whirl wind affair of Dmitry Dmitrich Gurov and Anna Sergeyevna in such a way that we can draw our own conclusions about their characters. The narrator, who plays no character part in this story, does seem to know everything about the lovebirds. S/he also explains each character’s personality and quips portions of their conversations. The conversations that we are told about give the reader insight into the feelings of Dmitry and Anna. We learn about their comings and goings from the narrator. In Yalta, the narrator tells us of the many social scenes like the esplanade, confectionery shop and a public garden. The narrator sees into the romantic situations of Dmitry and Anna’s hotel room encounters and the private conversations that also welcome the reader into the relationship. The pain and restraints of each character’s home and life are addresses by the narrator also. Whether ensconced in safe houses and relationships or free to roam while on vacation the reader learns it all from the narrator. The point of view of this...
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...Crash: Of Racial Discrimination and Stereotypes November 3rd, 2011 Crash: Of Racial Discrimination and Stereotypes Directed by Paul Haggis and produced in 2004, Crash was the Oscar Awards winner of Best Picture in 2006. Aside from Best Picture, the movie won only one other award: Best Original Screenplay for Paul Haggis and Robert Moresco. Despite its little recognition, Crash is an important movie to watch. Plot The plot of Crash is not about a typical, narrative story in the usual sense. Instead, it focuses on a theme or message and weaves several linked stories to highlight the theme. The movie is essentially about racial discrimination and the consequences of stereotyping people. Set in LA, the story covers a 24-hour period. The movie depicts the stories of several people whose lives are intertwined by accidental and casual encounters, usually on the streets. The characters in the story are people of varying ethnic groups: a bad and a good cop, a group of police investigators, a couple of teenage robbers, a DA and his wife, an Arab family, a Hispanic locksmith and his family, and an affluent African American movie director and his wife. The story revolves around how all of these people have deeply ingrained prejudices and how they themselves could suffer from discrimination. Theme and depiction Discrimination and stereotyping of people sometimes happen as a result of reinforcement of the behavior of the people being discriminatory...
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...Appendix C Rhetorical Modes Matrix Rhetorical modes are methods for effectively communicating through language and writing. Complete the following chart to identify the purpose and structure of the various rhetorical modes used in academic writing. Provide at least 2 tips for writing each type of rhetorical device. |Rhetorical Mode |Purpose – Explain when or why |Structure – Explain what organizational |Provide 2 tips for writing in | | |each rhetorical mode is used. |method works best with each rhetorical mode. |each rhetorical mode. | |Narration |Anytime you tell what happened |The organizational method that works best |Two tips for narrative writing| | |or tell a story you use |with narrative writing is chronological |are decide if the story is | | |narration. |order. |factual or fictional, and use | | | | |transitional words and | | | | |phrases. | | |The purpose of an illustration |Order of importance is the best way to |One tip is to use transitional| |Illustration |essay is to show or demonstrate |organize an illustration essay. |words...
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...This excerpt from Nabokov's Pnin focuses on the main character Pnin and how he is obsessed about his health and assumes every worst possibilities that could happen to him. In this extract Pnin is in a station waiting to board a bus to Cremona. Due to circumstances he has to leave his bag in the station and board the bus and that's when he starts getting paranoid and anxious that something is happening to him and he thinks to himself that it's because he left his bag in the station and something bad is going to happen to him. So he stops the bus, gets his refund and lands in the middle of a strange town and starts thinking more about why he is feeling the way he is. He manages to pull out all sort of discomfort he is feeling at that moment and questions everything he did the day earlier. It seems like this story was written from the viewpoint of Pnin's Physician and he knows that Pnin has always had the tendency to over think every situation that comes his way and has a way to make it look bad, like it's written in the excerpt, “...That the repulsive automation he lodged had developed consciousness of its own”. Pnin has also kept track of and noted down the date of all those time he got the same anxious feeling and he's very specific about it. He seem like a very fidgety and a nervous person as a whole. The narrators of this story sounds like he is also in the same state of mind as Pnin's because of the way he ponders about life, death and the world. Pnin seems very confused...
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