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Electrical engineering What is electrical engineering? Electrical engineering is a field of engineering that generally deals with the study and application of electricity, electronics, and electromagnetism Info about electrical engineering This field first became an identifiable occupation in the later half of the 19th century after commercialization of the electric telegraph, the telephone, and electric power distribution and use Subsequently, broadcasting and recording media made electronics part of daily life. The invention of the transistor, and later the integrated circuit, brought down the cost of electronics to the point they can be used in almost any household object.
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
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Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 2 on General Course of Electrical Drive STEP DRIVE (FESTO) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram 2. Program texts Program parts concenring the tasks of my variant are marked in bold, with an explanation of their meaning marked with // after them.
Tallinn University of Technology Department of Electrical Engineering Report on laboratory work 4 on General Course of Electrical Drive INDUCTION MOTOR DRIVE (LUCAS-NÜLLE) Jüri Lina 666BMW Group M16 Variant 2 Tallinn 2014 1. Functional Diagram Nameplate data: Loading Machine SO3636- VDE 0530 IP:5 Is.KL: 6V 4 F U: 390V I: 4,4 A 4Nm/1.7k cos:
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
11 hinnatud tunnikontrolli/testi; üks variant igast testist
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NEUROBIOLOGY AUXILLARY GLOSSARY ACETYLCHOLINE – A neurotransmitter in both the brain and peripheral nervous system* (PNS). In the brain it helps regulate memory, whilst it controls the actions of skeletal and smooth muscle within the PNS. ACTION POTENTIAL – An electrical phenomenon which occurs when a neurone is activated and temporarily reverses the electrical state of its interior membrane from negative to positive. An electrical charge travels along the axon to the neurone’s ending (terminal) where it triggers the release of a neurotransmitter* and then disappears. ADRENALINE (U.S. - Epinephrine) – A hormone released by the adrenal medulla* and a neurotransmitter acting at the level of the autonomic nervous system and the brain. ADRENAL CORTEX – The outer layer of the adrenal, a small endocrine gland located near the kidney. It produces and secretes several hormones* (corticosteroids) e.g. cortisol
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- 25. If J = 3, = 2, and t = 10, what will be T? -3*2/10=0,6 I*w/t 26. If J = 12 and T = 10, what will be acceleration? -10/12=0,8m/s2 T/J 27. If J = 4 T = 2, and = 5, how long the start-up will continue? -4*5/2=10s I*w/T 28. If J = 1 and T = 5, what speed will be reached at t = 2? -5*2/1=10rad/s t*T/J 29. If J = 12, what torque is required to provide acceleration of 5? -12*5=60Nm 30. If J = 5 and T = 5, what time is needed to reach the speed of 5? -5*5/5=5s I*w/T 2. Quiz on Electrical Drive Characteristics 1. Name the typical kinds of the time response processes. 2. What units are used to measure the drive quick action? 3. What units are used to measure the time constants? 4. What is the usual accuracy range of the accurate drives? 5. Does the mechanical time constant depend on the start-up speed? 6. How can the electromagnetic time constant be calculated? 7. Which time constant is usually the longest and which one is the shortest ? thermal, mechanical, or electromagnetic? 8
Solar power Tanel terras The basics of solar power Solar power is the conversion of sunlight into electricity Photovoltaics Concentrated solar power Concentrated solar power · Electrical power is produced when the concentrated light is converted to heat, which Click to edit Master text styles drives a heat engine connected to an Second level electrical power generator or powers a Third level thermochemical reaction Fourth level Fifth level
tagada tõhus diiselmootor operatsiooni. The EDC replaces the mechanical control governor with an electro-magnetic control device. EDC asendab mehaanilist kontrolli kuberner koos elektromagnetilise juhtseadmega. EDC on jagatud need peamised komponentide rühmade osas. · Electronic sensors for registering operating conditions and changes. Electronic andurid registreerimise käitamistingimuste ja muudatusi. A wide array of physical inputs is converted into electrical signal outputs. Mitmekesised füüsilise sisendite muundub elektrilise signaali väljundid. · Actuators or solenoids which convert the control unit's electrical output signal into mechanical control movement. Actuators või solenoidid , mis muudavad kontrolli üksuse elektri-väljundsignaali mehaaniliseks liikumise kontrollimiseks. · ECM (Electronic Control Module ) or Engine ECU (Electronic Control Unit) with
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. Large ships typically have three or more synchronized generators to ensure smooth operation. The combined output of a ship's generators is well above the actual power requirement to accommodate maintenance or the loss of one generator. 1.1.1)Diesel engine The diesel engine (also known as a compression-ignition engine) is an internal combustion engine that uses the heat of compression to initiate ignition and burn the fuel that has been injected into the combustion chamber
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. The torque production is the result of interaction of current - flux. The mechanical torque as compared to the electromechanical torque is ?? The source of the magnetic flux of the motor is DC or permanent magnet. The most suitable for the speed control is synchronous servo motor.
GENERAL INFO Ø Most widely used welding technique Ø Very flexible in terms of the metal thicknesses Ø The cheapest metal welding technique Ø Comfortable: equipment is easy to carry Shielded metal arc welding OPERATION Ø Flux covered metal electrode to carry an electrical current Ø The current forms an arc Ø Electrode and work base is melted by the heat produced Ø Molten metal from electrode and the metal pool from base metal mix together Ø Molten metal is protected with slag and gases Shielded metal arc welding GAS METAL ARC WELDING Gas metal Arc welding GENERAL INFO
Tesla also worked with Marconi. Others made fortunes with his inventions, but Tesla was penniless and rejected as he failed to protect his commercial interests. He invested all his money into inventions to make men’s life a little easier. Tesla was born at the stroke of midnight between July 9th and 10th 1856. A fierce electrical storm raged that night. His father was an Orthodox priest. His mother accompanied by .one of the oldest Serbian families. In his boyhood he suffered from a peculiar reflection due to the appearance of images often descended from strong flashes of light. He was unable to distinguish whether what he saw was tangible or not. He pictured the Niagara in his imagination as a big wheel run by the Nature. In his room he could hear the ticking of a watch with 3 rooms between him and the timepiece.
87. Gearbox käigukast 88. To turn forwards- pöörlema ettepoole 89. Due to - millegi tõttu 90. Combined movement kombineeritud liikumine 91. To turn backwards pöörlena tagurpidi 92. Gear stick käigukang 93. Reverse gear tagasikäik 94. Approximately ligikaudu, umbkaudu 95. Vaporised fuel aurustatud kütus 96. To inject sisse pritsima 97. Instantly koheselt,silmapilkselt 98. Auxiliary abi-, lisa- eel- 99. Electrical ignition system elektriline süütesüsteem 100. To warm up soojenema 101. Efficiency tööjõudlus, kasutegur, tõhusus 102. (suitable) design (sobiv) konstruktsioon 103. To operate töötama 104. Every other stroke iga teine fakt 105. Aeroplane lennuk 106. Aircraft õhusõiduk 107. To suck sisse imema, tõmbama 108. Combustion chamber põlemiskamber 109
2,09 V 2,09 ∗1 ∗1 = =1000kHz RL 100 k 0,4∗170∗1 f OUT = = = =10 0 0000 R t∗ct 6,8 k∗0,01 μ 68 μ Question 5 Question 6 One of the reasons for using time/frequency based measurements in microcontroller systems is to be able eliminate ground loops. Explain the unwanted ground loop that may occur in an electrical scheme with the help of a figure. Ground loop refers to an unwanted current in an electrical system. This is caused by a conductor that is connecting two points that are supposed to have same potential, but actually have different potentials, often ground. Noise and interference in electronics are mostly caused by falsely installed or created ground loops. Ground loop occurs when there are more than one gorund connection paths between many parts of equipment. Question 7
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report on Exercises 1 on Electronics and Semiconductor Engineering Linear Circuits Student AAVB-41 Tallinn 2008 Exercise 1.1. RL circuit Quantity Calculated Experimental
g) I haven't got …. to cleaning the fish yet. h) Why don't we warm …. last night's leftovers for lunch? i) Keith usually makes …. his recipes as he goes along. j) The waiter seemed a bit put …. when we didn't leave a tip. Task 6. Make a word or compound word to match the description. a) A spoon used for putting sugar in tea teaspoon b) A cloth put on the table at meal times c) A metal device for opening bottles d) A pot in which tea is made e) An electrical appliance for making toast f) A cup specially made for coffee g) An omelette containing mushrooms h) An electrical appliance for mixing food i) A napkin made of paper j) The amount contained in a tablespoon k) An electrical appliance for washing dishes
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report on Exercises 2 on Electronics and Semiconductor Engineering Filters Student AAVB-41 Tallinn 2008 Exercise 2.1. Low-pass filter Circuit diagram
Disappoint Disappointment -------------- Disappoint Disappointed Disappointingly (Disappointing) Donate Donation Donor Donate ----------------- ------------------- Electric Electricity Electrician Electrify Electricity Electrically Electrical Enjoy Enjoyment --------------- Enjoy Enjoyable ------------------ Explain Explanation --------------- Explain Explainable ------------------ Finance Finance Financier Finance Financial Financially Flatter Flattery --------------- Flatter Flattered Flatteringly
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
Hydroelectricity Sander Vidder Kristo London Hydroelectricity Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy. History Hydropower has been used since ancient times to grind flour and perform other tasks. In the mid1770s, French engineer Bernard Forest de Bélidor published Architecture Hydraulique which described vertical and horizontalaxis hydraulic machines. Hydroelectric Dam Generating methods Conventional (dams) Pumpedstorage Runoftheriver Underground Advantages
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report on Electronics and Semiconductor Engineering OP AMPS Student AAAB-41 Tallinn 2011 Exercise 5.1. Non.Inverting Voltage Amplifier Fig . Circuit diagram
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report on Exercises 3 on Electronics and Semiconductor Engineering Diode circuits Student AAVB-41 Tallinn 2008 Exercise 3.1. Diode characteristics Fig. 3.1. Circuit diagram Timing diagram
UNIT 14 (I) 1. Follow the road safety rules 2.Dangers 3.Right speed ... distance 4.Mp3 players ... mobile phones 5.Rd lights ... stop signs 6.Direction as the traffic 7. Any tricks on the road 8. The Pavement 9. A Crash Helmet 10. Brakes ... Wheels (II) 1.Although 2.Because 3.otherwise 4.because 5.Although 6.otherwise 7.Because (III) 1. Switch off all electrical appliances when you leave home 2. It's Dangerous to walk on a dark road without a reflector 3. Children mustn't play with matches because it might cause a fire 4. Have you ever had a car crash 5. It's dangerous to dive into the river in an unknown place 6. Do you always wear a crash helmet when you go cycling (IV) 1. Lives | 9. Realized 2. Was | 10. Stopped 3. Didn't Wear | 11. Was 4. Thinks | 12. understood 5. Noticed | 13. have learned 6
ELECTRIC CARS 2016 Electric car – what is it? • Powered by one or more electric motors, using electrical energy • Energy is stored in rechargeable batteries or another energy storage device • Require charging. Can be charged from home or special station History • First electric cars were produced in 1880s • Were popular in 19th and 20th cebtury •Then ICEs became more advanced Advantages • 3 x more efficient as ICE • Quieter • Do not emit tailpipe pollutants • Instant, strong and smooth acceleration • Lower running costs • Government discounts Disadvantages
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report on Exercises 5 On Electronics and Semiconductor Engineering Op amps AAVB-41 Tallinn 2008 Exercise 5.1. Non-Inverting Voltage Amplifier Fig. 5.2. Diagrams of bandwidth versus gain Data table R1,k Measur
Lühis ja kaitsmed Mis on lühis? Lühiühendus e lühis vooluringi osa otste ühendus juhiga, mille takistus on selle osa tavalise takistusega võrreldes väga väike Lühis Juhtmed kuumenevad üle Voolutugevuse suurenemine Kogutakistus on väga väike Miks tekib lühis? Riknenud isolatsiooniga faasi ja nulljuhtme juhuslikul kokkupuutel Faasijuhtme kokkupuutel elekriseadme Maaga ühendatud metallkerega Elektriohutuse nõuete rikkumisel Kaitse Kaitseb vooluallikaid, elektriseadmeid, juhtmeid Katkestab voolu, kui voolutugevus juhtmetes ületab lubatud väärtuse. Jadamisi elektritarvitiga Elektrivõrkudes, liiklus vahendites jm seadmetes Sulavkaitse sulavast materjalist traat portselanist korgis Traat sulab, katkestab voolu Iga kaitse talub erineva tugevusega voolu Ühekordseks kasutamiseks Kaitsmepesa ja kaitsme voolutugevuse lubatavad väärtused on samad Bimetallkaitse kahest eri metallist kokkuneeditud plaat Plaat soojeneb, kaardub, katkestab ...
power production, include clothing, banking and manufacturing North East Newcastle-upon-Tyne. iron core, lead and Sheep farming, Berwick-upon-Tweed. silver, glass- salmon fisheries. Sunderland. cathedral making, electrical timber producer. city of Durham. machinery and pottery, manufacturing and engineering industries, producer of salt. Yorkshire York, Leeds, Sheffield, Engineering , Cows, sheep.
This includes drift caused by component heating, noise, etc. 4. The output waveform according to input: 5. A) 100 Hz B) 500 Hz C) 1 kHz 6. In an electrical system, a ground loop usually refers to a current, almost always unwanted, in a conductor connecting two points that are supposed to be at the same potential, often ground, but are actually at different potentials. Ground loops created by improperly designed or improperly installed equipment are a major cause of noise and interference in electronics. A ground loop occurs when there is more than one ground connection path between two or more pieces of equipment (see picture below)
Supercells · Single, large storm 20-40 km across · Last for hours Supercell What causes thunder? · Thunder is caused by lightning. When a lightning bold travels from the cloud to the ground it actually opens up a little hole in the air. When the light is gone the air collapses back and creates a sound wave that we hear as thunder What to do during a thunderstorm? · In a forest: seek shelter in a low area under thick growth of trees. · Avoid using electrical appliances, unplug them. · Do not thake baths or showers during storms Some interesting facts · Death rate in the US: 1700 injuries per year. 300 lightening injures. · At any given time approximately 2,000 thunderstorms are occurring on Earth. · About 10% of lightning strike victims are killed; 90% survive However, many survivors suffer from long lasting disablilities.
alternatives to things that you would just throw away. For example: instead of paper cups and plates use ordinary plates. Reuse- Use thing that you have already got or give them to people who need those things. For example: glothes, use newspaper as a wrapping paper. Recycle- recycle thing. It does not take too long and it makes so much differencs Saving energy and your money Save electricity - people use a lot of electricity only because they forget or leave electrical appliances on. How: unplug everything that you do not use and do not forget to turn the light off Save water - Wasting water wastes electricity wich wastes energy. How: repair all leaky water mechanisms and if possible take shorter showers Saving energy and your money Save gasoline- It takes a lot of energy to operate a car. How: use other healthier alternatives like bicyclel or walking, but even using public transport helps reduce gasoline usage
gives tips how to do real handmade bread. · Sheering secrets how to get bread nice and fluffy · Everyone can bake their own bigbread. Day 2 · 09:00 - Breakfast in Guesthouse · 10:15 Nina Lighthouse · 10:45 Kasepää old believer`s Prayer house · 11:30 - Kallaste outcrop · 12:20 Kolkja fish and onion restaurant · 15:30 Tallinn airport Bus · Bus- MB Sprinter 20 seats · Equipment CD stereo, electrical windows, air conditioner, microfon, coffee machine, fridge, woofer Bus from inside and outside Sights Kallaste outcrop Lighthouse Kasepää Old believer`s house Art gallery Calculation 12 persons/ one night satying · 120 EUR workshop · 98 EUR lunch (day 1) · 260EUR bus service · 435 EUR accommodation, includes breakfast · 108 visiting castle · 140EUR dinner · 140 Lunch (day 2) · Total: 1301 EUR · Per person: 109 EUR
a) Vin = 0.0836 V b) Vin = 0.418 V c) Vin = 0.836 V Solution: Determine the output frequency (fOUT). From the chart, Rs = 17 kΩ, RL = 100 kΩ, Rt = 6.8 kΩ, Ct = 0.01 µF. a) For Vin = 0.0836 V, fOUT= 100 Hz b) For Vin = 0.418 V, fOUT= 500 Hz c) For Vin = 0.836 V, fOUT= 1kHz Question 6 (10 marks) One of the reasons for using time/frequency based measurements in microcontroller systems is to be able eliminate ground loops. Explain the unwanted ground loop that may occur in an electrical scheme with the help of a figure. Solution: http://en.wikipedia.org/wiki/Ground_loop_(electricity) In an electrical system, a ground loop usually refers to a current, almost always unwanted, in a conductor connecting two points that are supposed to be at the same potential, often ground, but are actually at different potentials. Ground loops created by improperly designed or improperly installed equipment are a major cause of noise and interference in audio and video systems
1. Ülesanne kuulamine ! 2. Ülesanne , suurte tähtedega on vaja lünkadesse panna . I' ve come here BECAUSE you told me to. warm clothers OTHERWISE you ... ALTHOUGH the weather was .. Helmet BECAUSE it's too tight Let's clean .. OTHERWISE it .. Tom was taken ... ALTHOUGH .. 3. Ülesanne , vastused tõlkimisele . * Switch off all electrical appliances when you leave home * Cildren mustn't play with matches veacause it might cause a fire. * It's dangerous to walk on a dark road without a reflector. * Do you always wear a crash helmet when you go cycling? * It's dangerous to dive into the river in an unknown place * Have you ever had a car crash? 4. Ülesanne õiges ajavormis sõnad Mary LIVES in the North of England. Three years ago she WAS hurt because she
2015 Content What is it? Causes Signs and symptoms AIWS is named by … History Treatment Sources What is it? disorienting neurological condition that affects human perception. most common perceptions at night. micropsia(feeling yourself smaller) macropsia(feeling yourself bigger) pelopsia(objects appear nearer) teleopsia(objects appear further) Causes typical migraines temporal lobe epilepsys brain tumours psychoactive drugs Epstein-barr-virus infection abnormal amounts of electrical activity Exact causes are not known! Signs and symptoms hallmark sign is a migraine experiences of altered body images “lilliputian hallucinations” feeling of giddiness eye redness losing the sense of time memory loss sound sensations AIWS is named after … Can you guess it? :D Lewis Carroll’s famous novel “Alice’s adventures in Wonderland” Lilliputian refers to “Gulliver’s travels” by Jonathan Swift. History Also Todd’s syndrome
Third level Fourth level Fifth level Polytetrefluoroethylene Properities Thermoplastic polymer Hydrophobic Non-stick White solid Melting point - 327 °C Chemical resistance Inert Polytetrefluoroethylene Applications Electrical and electronic industry Metal finishing, paints and coatings Optical devices Automotive uses Cabling materials Food indusrty Polytetrefluoroethylene Safety PTFE is not dangerous in low-temperatures While PTFE is stable and nontoxic, it begins to deteriorate after the temperature of cookware reaches about 260 °C. Polytetrefluoroethylene Conclusion Good material Good properities Unique structure Various applications
records, including most points, wins and podium finishes. Personal information Ø Sébastien Loeb born 26 February 1974 in Haguenau, Alsace Ø He grew up in Oberhoffen-sur-Moder. He competed as gymnast and became a four-time Alsatian champion, once champion of the French Grand East, and fifth in the French championship. Ø He broke off school in 1992 but resumed taking classes in 1994, aiming at a professional formation in electrical engineering. On 12 September 1994, in parallel with his classes, he started working as an electrician at the Socalec company near Haguenau Airport. Ø In 1995, at age 21, he quit his job and classes and definitely turned his attention to racing World Rally Championship record Ø Active years: 1999 present Ø Teams: Citroën, Kronos Citroën Ø Rallies: 161 Ø Championships: 8 (2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011) Ø Rally wins: 74 Ø
engine. In 1897 Diesel finished his first engine. It was more powerful than the fourstroke engine. Cars bodytypes Sedan Universal car body Coupe Cabriolet Nowadays Cars can be sorted by enginetypes. There are gas engines, diesel engines and some cars get their power even from electricity. Nowadays the most popular engines are the internalcombustion engine combined with the electrical engine forming a hybrid car. Hybrid car Marks There are lots of different car marks. Best known are: BMW, Audi, Ford, Volvo, Mazda, Ferrari. People use cars every day.
Tallinn University of Technology Department of Electrical Drives and Power Electronics Report Diodes Tallinn 2011 + A VS RV V D -
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