Leidsid 33 sarnast õppematerjali, mis on seotud failiga "Quiz3 vastatud". Need materjalid aitavad sul teemat sügavamalt mõista.
drive, motor, speed, frequency, electrical, torque, stator, field, mechanical, depend, ratio, types, rotor, constant, electromagnetic, slip, flux, characteristics, action, accuracy, know, tell, describe, operation, unit, affect, reference, frames, units, measure, drives, important, machines, components, supply, result, loaded, required, reach, usualTest VIII - cumulative test by Piigli, Mets, Parker, Kauler "Top delusion" question / answers are red. Test I The induction machines are associated with the names of Dolivo - Dobrovolsky, Tesla. The synchronous machines are associated with the name of Ferraris. The DC machines are associated with the names of Jacobi and Henry. The electromagnetic torque is born in air gap. The torque is proportional to the current in dc motor. Which equations are correct? P = sW; oomega = tuletis fii'st The angular frequency is 2*pi()*n / 60 ja 2*pi()f The motor torque is equal to TL + J * oomega tuletis aja järgi The inductor supplies the motor with flux. The leading companies in the world market of electrical drive engineering are: Mitsubishi. The energy balance is described by energy conservation law. The armature supplies the motor with current. The cheapest and the most reliable is induction motor.
Electrical drives and power electronics TESTS · The synchronous machines are associated with the names of Ferraris · Name the scientists who first studied electrical phenomena Coulomb · The DC machines are associated with the names of Jacobi Henry · The leading companies in the world market of electrical drive engineering are Mitsubishi · · The electromagnetic torque is born in air gap · What kind of drives the majority of drive systems present low accuracy · The induction machines are associated with the names of Dolivo-Dobrovolsky Tesla · One of the first eletrical motors has been built by Jacobi · Electromagnetic efficiency is measured in tesla · Time constants are measured by ms s hours · Who is the author of the first electrical motor Henry · Which rectifier cannot be built without a transformer 3-phase midpoint · Call the benefits of 3-phase rectifiers upon the 1-phase ones output voltage
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 1 on General Course of Electrical Drive SENSORLESS DRIVE POWER FLEX (ALLEN BRADLEY) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram 2. Tables of observations Task Operation/Record Observation 1 Reverse the motor speed. How long Time to reverse was 16 does the motor reverse
Microprocessors Real World Design Analog Interfacing to Embedded Microprocessors Real World Design Stuart Ball Boston Oxford Auckland Johannesburg Melbourne New Delhi Newnes is an imprint of Butterworth–Heinemann. Copyright © 2001 by Butterworth–Heinemann A member of the Reed Elsevier group All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Recognizing the importance of preserving what has been written, Butterworth–Heinemann prints its books on acid-free paper whenever possible. Library of Congress Cataloging-in-Publication Data Ball, Stuart R., 1956– Analog interfacing to embedded microprocessors : real world design / Stuart Ball. p. cm. ISBN 0-7506-7339-7 (pbk. : alk. paper) 1
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 3 on General Course of Electrical Drive SERVO DRIVE (FESTO) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Component list: PC with Wmmemoc software SEC-AC-305 controller MTR-AC-55 servo motor with encoder External 24VDC power supply unit Test stand with slide and limit switches 4. Tables of observations
Microcontroller homework for week 12 1. Three different stepper motors (illustrations on page 162-163): · permanent-magnet, · variablereluctance, · hybrid. The VR stepper has a soft iron rotor with teethand a wound stator. As current is applied to two opposing stator coils, the rotor is pulled into alignment with these twocoils. As the next pair of coils is energized, the rotor advances to the next position. The permanent magnet (PM) stepper has a rotor with alternating north and south. As the coils are energized, the rotor is pulled around. This figure shows a single coil to illustrate the concept, but a realstepper would have stator windings surrounding the rotor. The PM stepper has more torque than an equivalent VR stepper.
76 term comes from quantization error in an ideal ADC 4. THD - Total harmonic distortion is the ratio of the root-mean-square (rms) value of the fundamental signal to the mean value of the root-sum-square of its harmonics (generally, only the first 5 harmonics are significant). 5. SFDR- Spurious free dynamic range is the ratio of the rms value of the signal to the rms value of the worst spurious signal (fake signal) regardless of where it falls in the frequency spectrum. 6. Channels relate to the inputs of the ADC can either be multiplexed or individually selected. 7. Linearity relates to how well a ADC follows a linear function. All ADCs are to a certain extend non-linear. 8. All ADC are depended on temperature, operating temperature is defined as the temperature at which the ADC functions correctly. 9. Power dissipation refers to the amount power dissipated when the ADC is operational. Question 2 Output Code = 001111012
electric car powered by sunlight is a solar car, and an electric car powered by a gasoline generator is a form of hybrid car. Thus, an electric car that derives its power from an on-board battery pack is a form of battery electric vehicle (BEV). Most often, the term "electric car" is used to refer to pure battery electric vehicles. What types electric cars we have Usual electric cars have a batterey and elecrtic motor jusr like toy cars. Hybrid vehicle Then we have already hybrid vehicle (HEV) is a type of hybrid vehicle and electric vehicle which combines a conventional internal combustion engine (ICE) propulsion system with an electric propulsion system. The presence of the electric powertrain is intended to achieve either better fuel economy than a conventional vehicle, or better performance. Toyota prius Plug in hybrid
phase? 𝑅𝐶 𝑡𝑢𝑝 = − ∙ 𝑉𝑜𝑢𝑡 = −400𝜇𝑠 𝑉𝑖𝑛 The run-up phase takes 400 μs. b) How long would it take for this ADC to complete the run-down phase? 𝑡𝑑𝑜𝑤𝑛 = (𝑉𝑖𝑛 ∙ 𝑡𝑢𝑝 )/ −𝑉𝑟𝑒𝑓 = 0,001 = 1𝑚𝑠 The run-down phase takes 1 ms. Question 8 What is the typical performance in terms of THD at a frequency of 500 kHz of: a) MAX1200 pipeline ADC. -85dB b) MAX1201 pipeline ADC. -85dB c) MAX1205 pipeline ADC. -84dB Question 9 Name two disadvantages of: a) Flash ADC - expensive, high power consumption b) SAR ADC - speed is limited, needs anti-aliasing filter c) Dual-slope ADC -slow conversion, expensive external components required (high accuary components) a) Sigma Delta ADC -multibit ADC and multibit feedback DAC – higher order Question 10
segregated into various spaces. The engine room is one of these spaces, and is generally the largest physical compartment of the machinery space. The engine room houses the vessel's prime mover, usually some variations of a heat engine - diesel engine, gas or steam turbine. On some ships, the machinery space may comprise more than one engine room, such as forward and aft, or port or starboard engine rooms, or may be simply numbered. 1.1)Main engine The engine room of a motor vessel typically contains several engines for different purposes. Main, or propulsion engines are used to turn the ship's propeller and move the ship through the water. They typically burn diesel oil or heavy fuel oil, and may be able to switch between the two. There are many propulsion arrangements for motor vessels, some including multiple engines, propellers, and gearboxes. Large engines drive electrical generators that provide power for the ship's electrical systems.
LED Photodiode Optocoupler(LED and photo) 2, 3, 4)Varactor. Zener. Bi-directional.Sch.Led. Photodiode. 5)Varactor: U=1-100V, C=10-100 microF. Zener: Zener=-2.4...-200V. Schottky: on state voltage drop=0.3V. LED: conducting current=2-10mA.Voltage drop=2-3V. 6)Varactor: +(higher reverse voltage, smaller capacitance) Bi-direct:+(it operates in either direction to monitr under-voltage dips and over-voltage spikes of the ac input) Schottky:+ (high frequency, very fast) (Very low breakdown) LED:+(Low voltage, long life, fast switching) 7)Zener:designed to operate in the reverse breakdown. They are backbone of voltage regulators.Bi-directional:Used for line filtering. Two Zener diodes connected back-to-back. It is used as a filtering device to protect voltage-sensitive electronic devices from high-energy voltage transients.Schottky: High frequency diode. Based on the fact, that electrons in
oData transparency: In bit and byte oriented protocols, there is a problem if a control character (for ETX (End of Text) ·Same as ETB, only no more blocks will follow. ITB (End of > Differences with HDLC length of protocol field (1B or 2B) byte-oriented protocols) or the start-of-frame flag (for bit-oriented protocols) appears in the actual data. Intermediate Transmission Block) ·Same as ETB, except that the receiving statio Differs from HDLC because of multiaccess MAC that provides · Maximum payload length (default: 1500) This was not likely to happen in ASCII text, but is very likely with binary data. This is known as a data will not acknowledge after the error checking
ADC with 5V reference? 0.01484375V Question 5. A digital multimeter is designed to have a readout with four decimal digits. How many bits will be required in its ADC? 13 Bits Question 6. From Wikipedia Question 7. a) How long would it take for this ADC to complete the run-up phase? 400 µs b) How long would it take for this ADC to complete the run-down phase? 1 ms Question 8. What is the typical performance in terms of THD at a frequency of 500 kHz of: a) MAX1200 pipeline ADC. -85dB b) MAX1201 pipeline ADC. -85dB c) MAX1205 pipeline ADC. -84dB Question 9. Name two disadvantages of: a) Flash ADC Cost, high power demand b) SAR ADC Limited speed, requires anti-aliasing filter c) Dual-slope ADC Slow conversion, expensive components d) Sigma Delta ADC multibit ADC and multibit feedback DAC- higher order Question 10. a) Architecture SAR b) Differential linearity +- 0,4 LSB c) Minimum acquisition time 1,4 ms
Schizophrenics ofthe jump from one idea to another without maintaining firm line of thought. As a result their behavior often appears bizarre. It seems their extremely bizarre and morbid dreams are simply an exaggeration of a condition already present intheir waking life. Task of Psychology: What holds for dreams holds for most other psychological phenomena- they can all be viewed from several perspectives. Each perspective is valid but none is complete without the others, for psychology is a field of many faces and to see it fully, we must see them all. Wilhelm Wundt (Germany) and William James (USA)- founders. General Principles and Unique Individuals: Psychology's main purpose is not to describe the distinctive characteristics of a particular individual. Its main goal is to get at the facts that are general for all of mankind. Psychology hopes to find a route back to understand the individual event. It tries to find explanations to some behaviors and once such explanations are
America is a nation on the move. About 28 percent of the energy we use goes to transporting people and goods from one place to another. Cars, vans, and buses are commonly used to carry people. Trucks, airplanes, and railroads can be used to carry people and freight. Barges and pipelines only carry freight. In 2005, 12 there were almost 239 million vehicles (cars, buses, and trucks) in the United States. That's more than three motor vehicles for every four people! Automobiles, motorcycles, trucks, and buses drove nearly 3.0 trillion miles in 2005. That's almost one-twelfth the distance to the nearest star beyond the solar system. It's like driving to the sun and back 13,440 times. Picture 2.11. Energy use for transportation Gasoline is used mainly by cars, motorcycles, and light trucks; diesel is used mainly by heavier trucks, buses, and trains
Contents Air cleaner element renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Fuel filter renewal - fuel injection engines . . . . . . . . . . . . . . . . . . . .36 Alternator drivebelt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Hinge and lock check and lubrication . . . . . . . . . . . . . . . . . . . . . . .31 Automatic transmission fluid level check . . . . . . . . . . . . . . . . . . . . .27 Idle speed and mixture adjustment . . . . . . . . . . . . . . . . . . . . . . . . .10 Automatic transmission selector mechanism check . . . . . . . . . . . .28 Ignition system components check . . . . . . . . . . . . . . . . . . . . . . . . .11 Battery check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Ignition timing check - models with contact breaker distributor . . .14 Brake components check . . . . . . . . . . . . . . . . . . .
The problem definition section should have the following subsections using the suggested labels for each subsection: Problem Scope A short paragraph explicitly stating the problem to be solved. Technical Review This section describes why the problem is important. It is a long section providing background information of the problem. It contains a state-of-the-art technical review that brings the reader up to speed to the current state of the field which you are working in. Chances are that the reader is not an expert in the field, as you are. Even if the reader is an expert, he or she will appreciate a comprehensive review of the field. The review has two parts. The first part is a more detailed background to the field. For example, if you are developing a medical device, the background would be a tutorial on the medical condition being treated by the device
1.1 History of railguns The earliest electromagnetic gun developed was the coil gun, the development of which reportedly started already in 1845. The first patent was awarded to a professor in Oslo when he accelerated a 500g projectile to 50ms. The first primitive railgun was created in 1918 when French inventor Louis Octave Fauchon'Villeplee created an electric cannon where two parallel busbars were connected by the wings of a projectile and the apparatus surrounded by a magnetic field.When current passes through the busbars and projectile, a force is created which propels the projectile along the busbars into air. 4 The first theoretically viable railgun was proposed in 1944 by Joachim Hänsler of Germany's Ordnance Office. The gun was never built but a 1947 report concluded that while it was feasible in theory, the energy consumption for each gun would be enough to illuminate half of Chicago.
Word Order Table of Contents Types of Sentences ..................................................................................2 Parts of the Sentence ..............................................................................2 Word Order in Affirmative Sentences ...................................................3 Position of Adverbs of Frequency .........................................................5 Word Order in Negative Sentences......................................................6 Word Order in General Questions.........................................................7 Word Order in Special Questions ..........................................................8 Word Order in Subject Questions ..........................................................9 Types of Sentences There are four basic types of sentences in English.
Since the invention of the internal combustion engine, automotive engineers, speed junkies and racecar designers have been searching for ways to boost its power. One way to add power is to build a bigger engine. But bigger engines, which weigh more and cost more to build and maintain, are not always better. Another way to add power is to make a normal-sized engine more efficient. You can accomplish this by forcing more air into the combustion chamber. More air means more fuel can be added, and more fuel means a bigger explosion and greater horsepower
............................................. 42 15 Developed Design Model ................................................................. 42 16 Complex Connection in 2D .............................................................. 43 17 Complex Connection Modeled in Tekla ........................................... 43 18 LPR’s 3D CAD Shore-to-Structure Interface ................................... 44 19 Total Station Surveying Target in the Field ..................................... 45 20 Modeled Targets on a Wide Flange Column .................................... 45 21 Duct Clashing With a Beam ............................................................. 46 22 Upper Level Shores .......................................................................... 48 23 Rigging for a Complex Lift Modeled in 3D ..................................... 49 24 Working Session in the Field Office ........
· putting emphasis on the Q: Will he have been course of an action speaking? Note: we use continuous tenses only for actions and happenings (e.g. they are singing/ it is snowing). Some verbs are not action verbs (e.g. know, like). You cannot use continuous tenses with the following verbs: like love hate want need prefer know realise suppose mean understand believe remember belong contain consist depend seem 4 The following verbs are usually only used in Simple Present (not in the continuous form). state: be, cost, fit, mean, suit Example: We are on holiday. possession: belong, have Example: Sam has a cat. senses: feel, hear, see, smell, taste, touch Example: He feels the cold. feelings: hate, hope, like, love, prefer, regret, want, wish Example: Jane loves pizza.
been learning lots of new things Yesterday I 3) ................ (learn) to milk a cow. I 4) .............. ( sit ) down , 5) ................. ( put ) my the bucket under the cow and 6) ................ (fill) it with milk, then 7)....................( watch ) as the cow 8) ............. (kick) the bucket over. I bet the farmer 9).......................( see ) that happen plenty of times to the students he 10) . .. .... (teach)! Another thing I 11) .......... (learn) to do is drive a tractor , which I 12)..................... ( find ) very easy - it's just like driving a car. This morning I 13) .... (get up) at 6.OO.am and 14)............... (feed) all the animals. I also 15) ............. (collect) fresh eggs from the hen-house. Staying on the farm is a wonderful experience, and I 16)........................( enjoy ) every minute of it, though being a farmer is certainly a much harder job than I 17) .........................( think ) it was
delicious - disappointing - to lend cuisine British Youth (2) Most 18 and 19 year-olds in Britain are quite independent people. English people say that children grow up more quickly now. Relationships within the British family are different now. Children have more freedom to make their own decisions. For example, children aged 13 may be employed part time in Great Britain. Age 15 is legally a "young person" not a "child". Age 16 is a school leaving age. They can leave home, drive a moped, marry with "parents' consent" buy beer. Age 17 can drive a car. Age 18 can vote, get married, drink in pubs. Education is a very important part in the life of British youth. One can't become an independent person without it. When time comes to enter a college a young Englishman chooses one far away from home. It is a necessary part of becoming adult. During the last 30 years there were a lot of different trends in youth movements. All of
External marketing environment is divided into 4 different groups; socio-cultural, economic, technological and political factors. Internal marketing evironment is divided into 6 different groups; which are customers, competitors, suppliers, distributors, employees and stakeholders. Also this assignment is provided with the SWOT analysis, where strengths, weaknesses, opportunities and threats are examined. Mini Mini was at first manufactured by the Austin Motor Company Ltd. In 1957 Alec Issigonis was commissioned to develop a new type of small car. At the same year were the first sketches of Mini made and after that the Mini model is been created from wood and also the most important mechanical parts for Mini has been developed. Four years later the Mini hits the streets. In 1965 the first Mini with an automatic transmission enters the market and in 1969 Mini gets itself an own badge. In 1971 Mini was the best-selling British car in the world. 1994
measurable,2 self-discipline isn't needed. I can give you every popular diet in four lines. Ready? · Eat more greens. · Eat less saturated fat. · Exercise more and burn more calories. · Eat more omega-3 fatty acids. We won't be covering any of this. Not because it doesn't work--it does ... up to a point. But it's not the type of advice that will make friends greet you with "What the #$%& have you been doing?!", whether in the dressing room or on the playing field. That requires an altogether different approach. The Unintentional Dark Horse Let's be clear: I'm neither a doctor nor a PhD. I am a meticulous data cruncher with access to many of the world's best athletes and scientists. This puts me in a rather unusual position. I'm able to pull from disciplines and subcultures that rarely touch one another, and I'm able to test hypotheses using the kind of self-experimentation mainstream practitioners can't
@hD = m The wave length l is the distance between two wave crests. The shorter the wavelength the more of energy (potential) can be transported if wave high and velocity stay constant. @lD = m The period of waves is the time between two following wave crests over a fix point over the ground. @tper D = s The frequency f is the number of oscillating waves per second. It’s reciprocal is the period. 1 1 f= @fD = tper s The velocity v of a wave is defined as the speed over the ground. It is equal to the wavelength divided by the period. l m v= @vD =
Printed circuit board (PCB) - a thin, laminated sheet composed of a series of epoxy resin and copper layers and etched electronic circuits (signal, ground and power) Chipset (or core logic) - two or more integrated circuits which control the interfaces between the system processor, RAM, I/O devises, and adapter cards. Processor slot/socket - the slot or socket used to mount the system processor on the motherboard AGP - Accelerated Graphics Port - a high speed interface for video cards; runs at 1X (66MHz), 2X (133MHz), or 4X (266MHz). PCI - Peripheral Component Interconnect - a high speed interface for video cards, sound cards, network interface cards, and modems; runs at 33MHz. ISA - Industry Standard Architecture - a relatively low speed interface primarily used for sound cards and modems; runs at approx. 8MHz. RAM - Random Access Memory - see System RAM Port (serial, parallel, PS/2, USB, sound, LAN, VGA, SCSI) - interface connectors for the
What are my dreams for the future? What do I intend to do to achieve these dreams? What will I be doing ten years from now? How does this university fit in my plans for the future? You can also brainstorm using the following questions: What might help the evaluating committee in understanding me better? What distinguishes me from other applicants? What are my career aims? What skills do I possess that would improve your chances for success in this field? What has stimulated my interest in this field of study? Why should an admissions committee be interested in me? Why am I interested in this field? 1 Some other topics are suggested below to stimulate your thinking: The most memorable experiences The most influential ideas, people and events in your life Your likes and dislikes Your academic, career and personal goals Your key strengths
Juhendaja: Feliks Kaplanski Kuupäev: 27.04.2012 Tallinn 2012 1. What means vorticity? Derive vorticity transport equation in the plane and in the axisymmetric cases? 1.1 Vorticity is equal to the curl of the flow velocity. Vorticity is the tendency for elements of the fluid to "spin." Mathematically, vorticity is a vector field and is defined as the curl of the velocity field. w = curl (u ) = × u 1.2 Vorticity transport equation on the plane From the Navier-Stokes equation u 1 + u ( u ) = - p + g + v 2 u t We derive equation for two dimentional case on x-y plane (in the absence of gravity). x component: u u u 1 p +u +v =- + v 2 u t x y x (1.21) y component: v v v 1 p +u +v =- + v 2 u
B R I A N T R AC Y JOHN WILEY & SONS, INC. ccc_tracy_fm_i-xviii.qxd 7/7/03 3:22 PM Page iv Copyright © 2003 by Brian Tracy. All rights reserved. Published by John Wiley & Sons, Inc., Hoboken, New Jersey. Published simultaneously in Canada. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 750-4470, or on the web at www.copyright.com
pen. We instead have insatiable brains, with mental appetites. So our goal is to balance the brainwork with hearts and smiles. "Facts served with sauce." Where does common sense fit on? Is it teachable? To a degree, what we mean by common sense is simply learned experience. Something more exists, though. Those who we praise for common sense may be quick-witted, steady-nerved, and efficient at practical decision-making. It is likely some of those traits depend on genetic brain makeup. In any case, for purposes of an essay on education, I propose to say no more about common sense. Similarly, where do concentration, reflection, analysis and criticism enter? Are they best taught individually, or learned wholly as byproducts of studying mathematics, geography, history, etc? It is obvious that such skills are more valuable than any single subject which might be used as the vehicle to develop them. Inequality
any medium-that is, of any extension of ourselves-result from the new scale that is introduced into our affairs by each extension of ourselves, or by any new technology. Thus, with automation, for example, the new patterns of human association tend to eliminate jobs, it is true. That is the negative result. Positively, automation creates roles for people, which is to say depth of involvement in their work and human association that our preceding mechanical technology had destroyed. Many people would be disposed to say that it was not the machine, but what one did with the machine, that was its meaning or message. In terms of the ways in which the machine altered our relations to one another and to ourselves, it mattered not in the least whether it turned out cornflakes or Cadillacs. The restructuring of human work and association was shaped by the technique of fragmentation that is the essence of machine technology
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