...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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...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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...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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...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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...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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...INDUCTION (Ask student if anybody has been to a new place either for a job or for social event) Foot and Cook (2008) define Induction “as the process of helping new employees settle quickly into their job so that they soon become an efficient and productive employee”. CIPD factsheet 2014 are of the view that “‘induction’ is generally used in a workplace context to describe the whole process whereby employees adjust to their jobs and working environment”. Stirzaker (2004) found in her research on staff induction in international schools that induction must be a continuous process and not a one off event. The length and nature of the induction process depends on the complexity of the job and the background of the new employee. One size does not fit all - a standardised induction course is unlikely to satisfy anyone. “Induction is best seen as a process that commences before the employee starts work and extends through the first two or three months of employment. In the very best instances the new recruit is deliberately eased into the new job” (Lashley, Conrad, & Warwick 2002) Induction process can be formal or informal. Formal Induction – Normally associated with large organisations, who usually have a laid process of inducting the new recruit into the organisation Informal Induction - Purpose of Induction * CIPD opine that the purpose of induction is to ensure the effective integration of staff into or across the organisation for the benefit of both parties...
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...“A personalised induction will always be more effective” Discuss. Base your answer on theoretical concepts and techniques presented in class Module 2 Nicola Pepper Tutor: Jaswinder Challi Word count:2106 Introduction This paper will discuss methods and techniques used to personalise screeds to suit clients that we are working with. How we decide which modality to use on our clients, how important an initial consultation can be and my argument for using personalised screeds. I will discuss the factors involved in creating personalised screeds, and the benefits of creating a personalised screed for clients. Using different modalities and whether a script should be authoritative or permissive. The more personalised hypnotherapy is the more effective it will be, as whilst all of us appear quite similar, we are different in many ways. We have different likes and dislike; come from different cultural backgrounds; and will have been brought up in environments that have provided us with different outlooks, values and perspectives. If the best possible results are to be obtained in a hypnotherapy session there is a need to work closely with individuals in order to identify their likes and dislikes as well as their personality. In this way we can gain their trust and assist them in reaching a deep state of hypnosis. When we communicate with people we do not only use words but body language, with tone also playing a large part in what...
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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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...(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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...1 The Induction-Deduction Opposition: Ambiguities and Complexities of the Didactic Reality Wilfried Decoo Published in IRAL: International Review of Applied Linguistics, vol. 34, n° 2 (May 1996), 95-118. ("didactic" = pertaining to teaching and learning in a school context) Abstract An analysis of some of the scientific literature reveals that the terms "induction" and "deduction" often point to various concepts. A number of modalities need to be discerned, especially in the realm of "induction". Experimental comparisons of different methodological approaches may also neglect, to some extent, the complexities of what is really taking place in the classroom setting. The purpose of this article is not to take sides in the methodological controversy, but to contribute to a greater awareness of terminology identification and of the tangents, plural forms and crossings between didactic strategies that draw on "induction" or "deduction". Les termes "induction" et "déduction", tels qu'une analyse de la littérature scientifique nous les révèle, renvoient souvent à des concepts différents. Il semble utile de discerner les différentes modalités, en particulier dans le domaine de "l'induction". Les comparaisons expérimentales de différentes approches méthodologiques semblent négliger, du moins en partie, les aspects complexes de la réalité en classe. Cet article ne prend pas position dans la controverse méthodologique, mais désire contribuer à une plus grande prise de conscience d'une part...
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... “A personalised induction will always be more effective” In this essay I will discuss the importance of a personalised induction in relaxation and if it is always more effective. As we know all individuals are different, not just the outward appearance but the inward person to. People have different characters and personalities built on their genes influences through life experiences, friends, school and age. It is important when we first meet the client to get as much information and history as possible. The client must also be made aware of how hypnotherapy works so that mutual realistic expectations can be agreed, for example; if someone wants to lose weight, it is about changing their eating habits and retraining their subconscious mind, not a quick fix. All of the information gathered will give a clearer picture about their likes, dislikes, background, hobbies, fears, allergies and history of any illness’s and medication past and present. This will assist in not only finding out about their preferences and their modalities but will also be a time when anxiety levels can be reduced, a rapport and the trust between client and therapist can be built. Mutual trust, respect, belief and empathy are key to a successful initial meeting. This information also assists the therapist in determining an individual’s personality. A person’s preferences and modalities can change in order to a situation that they find themselves in. So you can see why the induction has to be flexible...
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...Nursing 202: Scheduled Induction Mindy C. Grenade Bucks County Community College Spring, 2014 Ms. Bobbie Table of Contents Abstract 3 Body of paper Introduction 4 History 4 Techniques 6 The Bishop Scoring System 7 Indications 8 Contraindications 10 Risks 12 Nursing 12 Conclusion 15 References Abstract Inducing labor has been occurring since before our time. There are two types of labor inductions, scheduled and elective. For purposes of this paper scheduled inductions will be focused on. A scheduled induction is defined as using artificial methods to start the labor process at a specific time. Inductions are performed for many reasons. In most cases scheduled induction are performed because of medical complications to the baby and/or mother. In healthcare, there has been an increase in incidence regarding scheduled inductions related to convenience for the mother as well as for the doctors. To better understand the complexity of scheduled induction the history has to be addressed. What is the reasoning behind changing the natural birthing process? This paper will explain the methods of induction: pharmacological vs. mechanical, and the indications thereof. Nurse’s play a key role in labor and delivery. They have to be prepared to address and treat their patients’ condition, as well as be knowledgeable on the contraindications of this delicate...
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...Recruitment, selection and training Recruitment is the process of identifying that the organisation needs to employ someone up to the point at which application forms for the post have arrived at the organisation. Selection then consists of the processes involved in choosing from applicants a suitable candidate to fill a post. Training consists of a range of processes involved in making sure that job holders have the right skills, knowledge and attitudes required to help the organisation to achieve its objectives. Recruiting individuals to fill particular posts within a business can be done either internally by recruitment within the firm, or externally by recruiting people from outside. The advantages of internal recruitment are that: 1. Considerable savings can be made. Individuals with inside knowledge of how a business operates will need shorter periods of training and time for 'fitting in'. 2. The organisation is unlikely to be greatly 'disrupted' by someone who is used to working with others in the organisation. 3. Internal promotion acts as an incentive to all staff to work harder within the organisation. 4. From the firm's point of view, the strengths and weaknesses of an insider will have been assessed. There is always a risk attached to employing an outsider who may only be a success 'on paper'. The disadvantages of recruiting from within are that: 1. You will have to replace the person who has been promoted 2. An insider may be less likely to make the essential...
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...February 11, 2014 was the day I was due to have my first child. Every day I went to appointments to see my gynecologist to check my body’s progress and my daughter’s heartbeat. After my due date pasted Dr. Lowden told me I needed to be induced. We scheduled an induction for the eighteenth of February. Suffering from a bleeding disorder made me mortified of having an induction because the risk of an emergency caesarian section increased. Pacing the rooms of my house alone my mother arrived to take me to the hospital for my induction. Being as scared as I was I had procrastinated packing the bags for the stay. I hurried with my bags and we left for Wesley. Sitting in the parking lot, eating what felt like my last meal, I asked my mother if we could just go home instead. She insisted that I must have my unborn daughter, no matter how scared I was. We headed into labor and delivery in the regular hospital, instead of the birth center. Since I was a bleeding risk I had to deliver in the regular hospital so I would be closer to the blood bank....
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